-<?php\r
-\r
-/*\r
-Graph Class. PHP Class to draw line, point, bar, and area graphs, including numeric x-axis and double y-axis.\r
-Version: 1.6.3\r
-Copyright (C) 2000 Herman Veluwenkamp\r
-\r
-This library is free software; you can redistribute it and/or\r
-modify it under the terms of the GNU Lesser General Public\r
-License as published by the Free Software Foundation; either\r
-version 2.1 of the License, or (at your option) any later version.\r
-\r
-This library is distributed in the hope that it will be useful,\r
-but WITHOUT ANY WARRANTY; without even the implied warranty of\r
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\r
-Lesser General Public License for more details.\r
-\r
-You should have received a copy of the GNU Lesser General Public\r
-License along with this library; if not, write to the Free Software\r
-Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
-\r
-Copy of GNU Lesser General Public License at: http://www.gnu.org/copyleft/lesser.txt\r
-Contact author at: hermanV@mindless.com\r
-*/\r
-\r
-/* This file contains modifications by Martin Dougiamas\r
- * as part of Moodle (http://moodle.com). Modified lines\r
- * are marked with "Moodle".\r
- */\r
-\r
-\r
-class graph {\r
- var $image;\r
- var $debug = FALSE; // be careful!!\r
- var $calculated = array(); // array of computed values for chart\r
- var $parameter = array( // input parameters\r
- 'width' => 320, // default width of image\r
- 'height' => 240, // default height of image\r
- 'file_name' => 'none', // name of file for file to be saved as.\r
- // NOTE: no suffix required. this is determined from output_format below.\r
- 'output_format' => 'PNG', // image output format. 'GIF', 'PNG', 'JPEG'. default 'PNG'.\r
-\r
- 'seconds_to_live' => 0, // expiry time in seconds (for HTTP header)\r
- 'hours_to_live' => 0, // expiry time in hours (for HTTP header)\r
- 'path_to_fonts' => 'fonts/', // path to fonts folder. don't forget *trailing* slash!!\r
- // for WINDOZE this may need to be the full path, not relative.\r
-\r
- 'title' => 'Graph Title', // text for graph title\r
- 'title_font' => 'default.ttf', // title text font. don't forget to set 'path_to_fonts' above.\r
- 'title_size' => 16, // title text point size\r
- 'title_colour' => 'black', // colour for title text\r
-\r
- 'x_label' => '', // if this is set then this text is printed on bottom axis of graph.\r
- 'y_label_left' => '', // if this is set then this text is printed on left axis of graph.\r
- 'y_label_right' => '', // if this is set then this text is printed on right axis of graph.\r
-\r
- 'label_size' => 12, // label text point size\r
- 'label_font' => 'default.ttf', // label text font. don't forget to set 'path_to_fonts' above.\r
- 'label_colour' => 'gray33', // label text colour\r
- 'y_label_angle' => 90, // rotation of y axis label\r
-\r
- 'x_label_angle' => 90, // rotation of y axis label\r
-\r
- 'outer_padding' => 8, // padding around outer text. i.e. title, y label, and x label.\r
- 'inner_padding' => 6, // padding beteen axis text and graph.\r
- 'outer_border' => 'none', // colour of border aound image, or 'none'.\r
- 'inner_border' => 'black', // colour of border around actual graph, or 'none'.\r
- 'inner_border_type' => 'box', // 'box' for all four sides, 'axis' for x/y axis only,\r
- // 'y' or 'y-left' for y axis only, 'y-right' for right y axis only,\r
- // 'x' for x axis only, 'u' for both left and right y axis and x axis.\r
- 'outer_background' => 'none', // background colour of entire image.\r
- 'inner_background' => 'none', // background colour of plot area.\r
-\r
- 'y_min_left' => 0, // this will be reset to minimum value if there is a value lower than this.\r
- 'y_max_left' => 0, // this will be reset to maximum value if there is a value higher than this.\r
- 'y_min_right' => 0, // this will be reset to minimum value if there is a value lower than this.\r
- 'y_max_right' => 0, // this will be reset to maximum value if there is a value higher than this.\r
- 'x_min' => 0, // only used if x axis is numeric.\r
- 'x_max' => 0, // only used if x axis is numeric.\r
-\r
- 'y_resolution_left' => 1, // scaling for rounding of y axis max value.\r
- // if max y value is 8645 then\r
- // if y_resolution is 0, then y_max becomes 9000.\r
- // if y_resolution is 1, then y_max becomes 8700.\r
- // if y_resolution is 2, then y_max becomes 8650.\r
- // if y_resolution is 3, then y_max becomes 8645.\r
- // get it?\r
- 'y_decimal_left' => 0, // number of decimal places for y_axis text.\r
- 'y_resolution_right' => 2, // ... same for right hand side\r
- 'y_decimal_right' => 0, // ... same for right hand side\r
- 'x_resolution' => 2, // only used if x axis is numeric.\r
- 'x_decimal' => 0, // only used if x axis is numeric.\r
-\r
- 'point_size' => 4, // default point size. use even number for diamond or triangle to get nice look.\r
- 'brush_size' => 4, // default brush size for brush line.\r
- 'brush_type' => 'circle', // type of brush to use to draw line. choose from the following\r
- // 'circle', 'square', 'horizontal', 'vertical', 'slash', 'backslash'\r
- 'bar_size' => 0.8, // size of bar to draw. <1 bars won't touch\r
- // 1 is full width - i.e. bars will touch.\r
- // >1 means bars will overlap.\r
- 'bar_spacing' => 10, // space in pixels between group of bars for each x value.\r
- 'shadow_offset' => 3, // draw shadow at this offset, unless overidden by data parameter.\r
- 'shadow' => 'grayCC', // 'none' or colour of shadow.\r
- 'shadow_below_axis' => true, // whether to draw shadows of bars and areas below the x/zero axis.\r
-\r
-\r
- 'x_axis_gridlines' => 'auto', // if set to a number then x axis is treated as numeric.\r
- 'y_axis_gridlines' => 6, // number of gridlines on y axis.\r
- 'zero_axis' => 'none', // colour to draw zero-axis, or 'none'.\r
-\r
-\r
- 'axis_font' => 'default.ttf', // axis text font. don't forget to set 'path_to_fonts' above.\r
- 'axis_size' => 12, // axis text font size in points\r
- 'axis_colour' => 'gray33', // colour of axis text.\r
- 'y_axis_angle' => 0, // rotation of axis text.\r
- 'x_axis_angle' => 90, // rotation of axis text.\r
-\r
- 'y_axis_text_left' => 1, // whether to print left hand y axis text. if 0 no text, if 1 all ticks have text,\r
- 'x_axis_text' => 1, // if 4 then print every 4th tick and text, etc...\r
- 'y_axis_text_right' => 0, // behaviour same as above for right hand y axis.\r
-\r
- 'x_offset' => 0.5, // x axis tick offset from y axis as fraction of tick spacing.\r
- 'y_ticks_colour' => 'black', // colour to draw y ticks, or 'none'.\r
- 'x_ticks_colour' => 'black', // colour to draw x ticks, or 'none'.\r
- 'y_grid' => 'line', // grid lines. set to 'line' or 'dash'...\r
- 'x_grid' => 'line', // or if set to 'none' print nothing.\r
- 'grid_colour' => 'grayEE', // default grid colour.\r
- 'tick_length' => 4, // length of ticks in pixels. can be negative. i.e. outside data drawing area.\r
-\r
- 'legend' => 'none', // default. no legend.\r
- // otherwise: 'top-left', 'top-right', 'bottom-left', 'bottom-right',\r
- // 'outside-top', 'outside-bottom', 'outside-left', or 'outside-right'.\r
- 'legend_offset' => 10, // offset in pixels from graph or outside border.\r
- 'legend_padding' => 5, // padding around legend text.\r
- 'legend_font' => 'default.ttf', // legend text font. don't forget to set 'path_to_fonts' above.\r
- 'legend_size' => 9, // legend text point size.\r
- 'legend_colour' => 'black', // legend text colour.\r
- 'legend_border' => 'none', // legend border colour, or 'none'.\r
-\r
- 'decimal_point' => '.', // symbol for decimal separation '.' or ',' *european support.\r
- 'thousand_sep' => ',', // symbol for thousand separation ',' or ''\r
-\r
- );\r
-\r
-\r
-\r
-// init all text - title, labels, and axis text.\r
-function init() {\r
-\r
-\r
- /// Moodle mods: overrides the font path\r
- global $CFG;\r
- $currlang = current_language();\r
- $fontpath = $CFG->dirroot."/lang/$currlang/fonts/";\r
- if (!file_exists("$fontpath"."default.ttf")) {\r
- $fontpath = $CFG->dirroot."/lang/en/fonts/";\r
- }\r
- $this->parameter['path_to_fonts'] = $fontpath;\r
-\r
- if (file_exists("$fontpath"."lang_decode.php")) {\r
- $this->parameter['lang_decode'] = "$fontpath"."lang_decode.php";\r
- } else {\r
- $this->parameter['lang_decode'] = "";\r
- }\r
- /// End Moodle mods\r
-\r
-\r
-\r
- $this->calculated['outer_border'] = $this->calculated['boundary_box'];\r
-\r
- // outer padding\r
- $this->calculated['boundary_box']['left'] += $this->parameter['outer_padding'];\r
- $this->calculated['boundary_box']['top'] += $this->parameter['outer_padding'];\r
- $this->calculated['boundary_box']['right'] -= $this->parameter['outer_padding'];\r
- $this->calculated['boundary_box']['bottom'] -= $this->parameter['outer_padding'];\r
-\r
- $this->init_x_axis();\r
- $this->init_y_axis();\r
- $this->init_legend();\r
- $this->init_labels();\r
-\r
- // take into account tick lengths\r
- $this->calculated['bottom_inner_padding'] = $this->parameter['inner_padding'];\r
- if (($this->parameter['x_ticks_colour'] != 'none') && ($this->parameter['tick_length'] < 0))\r
- $this->calculated['bottom_inner_padding'] -= $this->parameter['tick_length'];\r
- $this->calculated['boundary_box']['bottom'] -= $this->calculated['bottom_inner_padding'];\r
-\r
- $this->calculated['left_inner_padding'] = $this->parameter['inner_padding'];\r
- if ($this->parameter['y_axis_text_left']) {\r
- if (($this->parameter['y_ticks_colour'] != 'none') && ($this->parameter['tick_length'] < 0))\r
- $this->calculated['left_inner_padding'] -= $this->parameter['tick_length'];\r
- }\r
- $this->calculated['boundary_box']['left'] += $this->calculated['left_inner_padding'];\r
-\r
- $this->calculated['right_inner_padding'] = $this->parameter['inner_padding'];\r
- if ($this->parameter['y_axis_text_right']) {\r
- if (($this->parameter['y_ticks_colour'] != 'none') && ($this->parameter['tick_length'] < 0))\r
- $this->calculated['right_inner_padding'] -= $this->parameter['tick_length'];\r
- }\r
- $this->calculated['boundary_box']['right'] -= $this->calculated['right_inner_padding'];\r
-\r
- // boundaryBox now has coords for plotting area.\r
- $this->calculated['inner_border'] = $this->calculated['boundary_box'];\r
-\r
- $this->init_data();\r
- $this->init_x_ticks();\r
- $this->init_y_ticks();\r
-}\r
-\r
-function draw_text() {\r
- $colour = $this->parameter['outer_background'];\r
- if ($colour != 'none') $this->draw_rectangle($this->calculated['outer_border'], $colour, 'fill'); // graph background\r
-\r
- // draw border around image\r
- $colour = $this->parameter['outer_border'];\r
- if ($colour != 'none') $this->draw_rectangle($this->calculated['outer_border'], $colour, 'box'); // graph border\r
-\r
- $this->draw_title();\r
- $this->draw_x_label();\r
- $this->draw_y_label_left();\r
- $this->draw_y_label_right();\r
- $this->draw_x_axis();\r
- $this->draw_y_axis();\r
- if ($this->calculated['y_axis_left']['has_data']) $this->draw_zero_axis_left(); // either draw zero axis on left\r
- else if ($this->calculated['y_axis_right']['has_data']) $this->draw_zero_axis_right(); // ... or right.\r
- $this->draw_legend();\r
-\r
- // draw border around plot area\r
- $colour = $this->parameter['inner_background'];\r
- if ($colour != 'none') $this->draw_rectangle($this->calculated['inner_border'], $colour, 'fill'); // graph background\r
-\r
- // draw border around image\r
- $colour = $this->parameter['inner_border'];\r
- if ($colour != 'none') $this->draw_rectangle($this->calculated['inner_border'], $colour, $this->parameter['inner_border_type']); // graph border\r
-}\r
-\r
-function draw_stack() {\r
- $this->init();\r
- $this->draw_text();\r
-\r
- $yOrder = $this->y_order; // save y_order data.\r
- // iterate over each data set. order is very important if you want to see data correctly. remember shadows!!\r
- foreach ($yOrder as $set) {\r
- $this->y_order = array($set);\r
- $this->init_data();\r
- $this->draw_data();\r
- }\r
- $this->y_order = $yOrder; // revert y_order data.\r
-\r
- $this->output();\r
-}\r
-\r
-function draw() {\r
- $this->init();\r
- $this->draw_text();\r
- $this->draw_data();\r
- $this->output();\r
-}\r
-\r
-// draw a data set\r
-function draw_set($order, $set, $offset) {\r
- if ($offset) @$this->init_variable($colour, $this->y_format[$set]['shadow'], $this->parameter['shadow']);\r
- else $colour = $this->y_format[$set]['colour'];\r
- @$this->init_variable($point, $this->y_format[$set]['point'], 'none');\r
- @$this->init_variable($pointSize, $this->y_format[$set]['point_size'], $this->parameter['point_size']);\r
- @$this->init_variable($line, $this->y_format[$set]['line'], 'none');\r
- @$this->init_variable($brushType, $this->y_format[$set]['brush_type'], $this->parameter['brush_type']);\r
- @$this->init_variable($brushSize, $this->y_format[$set]['brush_size'], $this->parameter['brush_size']);\r
- @$this->init_variable($bar, $this->y_format[$set]['bar'], 'none');\r
- @$this->init_variable($barSize, $this->y_format[$set]['bar_size'], $this->parameter['bar_size']);\r
- @$this->init_variable($area, $this->y_format[$set]['area'], 'none');\r
-\r
- $lastX = 0;\r
- $lastY = 'none';\r
- $fromX = 0;\r
- $fromY = 'none';\r
-\r
- //print "set $set<BR>";\r
- //expand_pre($this->calculated['y_plot']);\r
-\r
- foreach ($this->x_data as $index => $x) {\r
- //print "index $index<BR>";\r
- $thisY = $this->calculated['y_plot'][$set][$index];\r
- $thisX = $this->calculated['x_plot'][$index];\r
-\r
- //print "$thisX, $thisY <BR>";\r
-\r
- if (($bar!='none') && (string)$thisY != 'none') {\r
- if ($relatedset = $this->offset_relation[$set]) { // Moodle\r
- $yoffset = $this->calculated['y_plot'][$relatedset][$index]; // Moodle\r
- } else { // Moodle\r
- $yoffset = 0; // Moodle\r
- } // Moodle\r
- //$this->bar($thisX, $thisY, $bar, $barSize, $colour, $offset, $set); // Moodle\r
- $this->bar($thisX, $thisY, $bar, $barSize, $colour, $offset, $set, $yoffset); // Moodle\r
- }\r
-\r
- if (($area!='none') && (((string)$lastY != 'none') && ((string)$thisY != 'none')))\r
- $this->area($lastX, $lastY, $thisX, $thisY, $area, $colour, $offset);\r
-\r
- if (($point!='none') && (string)$thisY != 'none') $this->plot($thisX, $thisY, $point, $pointSize, $colour, $offset);\r
-\r
- if (($line!='none') && ((string)$thisY != 'none')) {\r
- if ((string)$fromY != 'none')\r
- $this->line($fromX, $fromY, $thisX, $thisY, $line, $brushType, $brushSize, $colour, $offset);\r
-\r
- $fromY = $thisY; // start next line from here\r
- $fromX = $thisX; // ...\r
- } else {\r
- $fromY = 'none';\r
- $fromX = 'none';\r
- }\r
-\r
- $lastX = $thisX;\r
- $lastY = $thisY;\r
- }\r
-}\r
-\r
-function draw_data() {\r
- // cycle thru y data to be plotted\r
- // first check for drop shadows...\r
- foreach ($this->y_order as $order => $set) {\r
- @$this->init_variable($offset, $this->y_format[$set]['shadow_offset'], $this->parameter['shadow_offset']);\r
- @$this->init_variable($colour, $this->y_format[$set]['shadow'], $this->parameter['shadow']);\r
- if ($colour != 'none') $this->draw_set($order, $set, $offset);\r
-\r
- }\r
-\r
- // then draw data\r
- foreach ($this->y_order as $order => $set) {\r
- $this->draw_set($order, $set, 0);\r
- }\r
-}\r
-\r
-function draw_legend() {\r
- $position = $this->parameter['legend'];\r
- if ($position == 'none') return; // abort if no border\r
-\r
- $borderColour = $this->parameter['legend_border'];\r
- $offset = $this->parameter['legend_offset'];\r
- $padding = $this->parameter['legend_padding'];\r
- $height = $this->calculated['legend']['boundary_box_all']['height'];\r
- $width = $this->calculated['legend']['boundary_box_all']['width'];\r
- $graphTop = $this->calculated['boundary_box']['top'];\r
- $graphBottom = $this->calculated['boundary_box']['bottom'];\r
- $graphLeft = $this->calculated['boundary_box']['left'];\r
- $graphRight = $this->calculated['boundary_box']['right'];\r
- $outsideRight = $this->calculated['outer_border']['right'];\r
- $outsideBottom = $this->calculated['outer_border']['bottom'];\r
- switch ($position) {\r
- case 'top-left':\r
- $top = $graphTop + $offset;\r
- $bottom = $graphTop + $height + $offset;\r
- $left = $graphLeft + $offset;\r
- $right = $graphLeft + $width + $offset;\r
-\r
- break;\r
- case 'top-right':\r
- $top = $graphTop + $offset;\r
- $bottom = $graphTop + $height + $offset;\r
- $left = $graphRight - $width - $offset;\r
- $right = $graphRight - $offset;\r
-\r
- break;\r
- case 'bottom-left':\r
- $top = $graphBottom - $height - $offset;\r
- $bottom = $graphBottom - $offset;\r
- $left = $graphLeft + $offset;\r
- $right = $graphLeft + $width + $offset;\r
-\r
- break;\r
- case 'bottom-right':\r
- $top = $graphBottom - $height - $offset;\r
- $bottom = $graphBottom - $offset;\r
- $left = $graphRight - $width - $offset;\r
- $right = $graphRight - $offset;\r
- break;\r
-\r
- case 'outside-top' :\r
- $top = $graphTop;\r
- $bottom = $graphTop + $height;\r
- $left = $outsideRight - $width - $offset;\r
- $right = $outsideRight - $offset;\r
- break;\r
-\r
- case 'outside-bottom' :\r
- $top = $graphBottom - $height;\r
- $bottom = $graphBottom;\r
- $left = $outsideRight - $width - $offset;\r
- $right = $outsideRight - $offset;\r
- break;\r
-\r
- case 'outside-left' :\r
- $top = $outsideBottom - $height - $offset;\r
- $bottom = $outsideBottom - $offset;\r
- $left = $graphLeft;\r
- $right = $graphLeft + $width;\r
- break;\r
-\r
- case 'outside-right' :\r
- $top = $outsideBottom - $height - $offset;\r
- $bottom = $outsideBottom - $offset;\r
- $left = $graphRight - $width;\r
- $right = $graphRight;\r
- break;\r
- default: // default is top left. no particular reason.\r
- $top = $this->calculated['boundary_box']['top'];\r
- $bottom = $this->calculated['boundary_box']['top'] + $this->calculated['legend']['boundary_box_all']['height'];\r
- $left = $this->calculated['boundary_box']['left'];\r
- $right = $this->calculated['boundary_box']['right'] + $this->calculated['legend']['boundary_box_all']['width'];\r
-\r
-}\r
- // legend border\r
- if($borderColour!='none') $this->draw_rectangle(array('top' => $top,\r
- 'left' => $left,\r
- 'bottom' => $bottom,\r
- 'right' => $right), $this->parameter['legend_border'], 'box');\r
-\r
- // legend text\r
- $legendText = array('points' => $this->parameter['legend_size'],\r
- 'angle' => 0,\r
- 'font' => $this->parameter['legend_font'],\r
- 'colour' => $this->parameter['legend_colour']);\r
-\r
- $box = $this->calculated['legend']['boundary_box_max']['height']; // use max height for legend square size.\r
- $x = $left + $padding;\r
- $x_text = $x + $box * 2;\r
- $y = $top + $padding;\r
-\r
- foreach ($this->y_order as $set) {\r
- $legendText['text'] = $this->calculated['legend']['text'][$set];\r
- if ($legendText['text'] != 'none') {\r
- // if text exists then draw box and text\r
- $boxColour = $this->colour[$this->y_format[$set]['colour']];\r
-\r
- // draw box\r
- ImageFilledRectangle($this->image, $x, $y, $x + $box, $y + $box, $boxColour);\r
-\r
- // draw text\r
- $coords = array('x' => $x + $box * 2, 'y' => $y, 'reference' => 'top-left');\r
- $legendText['boundary_box'] = $this->calculated['legend']['boundary_box'][$set];\r
- $this->update_boundaryBox($legendText['boundary_box'], $coords);\r
- $this->print_TTF($legendText);\r
- $y += $padding + $box;\r
- }\r
- }\r
-\r
-}\r
-\r
-function draw_y_label_right() {\r
- if (!$this->parameter['y_label_right']) return;\r
- $x = $this->calculated['boundary_box']['right'] + $this->parameter['inner_padding'];\r
- if ($this->parameter['y_axis_text_right']) $x += $this->calculated['y_axis_right']['boundary_box_max']['width']\r
- + $this->calculated['right_inner_padding'];\r
- $y = ($this->calculated['boundary_box']['bottom'] + $this->calculated['boundary_box']['top']) / 2;\r
-\r
- $label = $this->calculated['y_label_right'];\r
- $coords = array('x' => $x, 'y' => $y, 'reference' => 'left-center');\r
- $this->update_boundaryBox($label['boundary_box'], $coords);\r
- $this->print_TTF($label);\r
-}\r
-\r
-\r
-function draw_y_label_left() {\r
- if (!$this->parameter['y_label_left']) return;\r
- $x = $this->calculated['boundary_box']['left'] - $this->parameter['inner_padding'];\r
- if ($this->parameter['y_axis_text_left']) $x -= $this->calculated['y_axis_left']['boundary_box_max']['width']\r
- + $this->calculated['left_inner_padding'];\r
- $y = ($this->calculated['boundary_box']['bottom'] + $this->calculated['boundary_box']['top']) / 2;\r
-\r
- $label = $this->calculated['y_label_left'];\r
- $coords = array('x' => $x, 'y' => $y, 'reference' => 'right-center');\r
- $this->update_boundaryBox($label['boundary_box'], $coords);\r
- $this->print_TTF($label);\r
-}\r
-\r
-function draw_title() {\r
- if (!$this->parameter['title']) return;\r
- //$y = $this->calculated['outside_border']['top'] + $this->parameter['outer_padding'];\r
- $y = $this->calculated['boundary_box']['top'] - $this->parameter['outer_padding'];\r
- $x = ($this->calculated['boundary_box']['right'] + $this->calculated['boundary_box']['left']) / 2;\r
- $label = $this->calculated['title'];\r
- $coords = array('x' => $x, 'y' => $y, 'reference' => 'bottom-center');\r
- $this->update_boundaryBox($label['boundary_box'], $coords);\r
- $this->print_TTF($label);\r
-}\r
-\r
-function draw_x_label() {\r
- if (!$this->parameter['x_label']) return;\r
- $y = $this->calculated['boundary_box']['bottom'] + $this->parameter['inner_padding'];\r
- if ($this->parameter['x_axis_text']) $y += $this->calculated['x_axis']['boundary_box_max']['height']\r
- + $this->calculated['bottom_inner_padding'];\r
- $x = ($this->calculated['boundary_box']['right'] + $this->calculated['boundary_box']['left']) / 2;\r
- $label = $this->calculated['x_label'];\r
- $coords = array('x' => $x, 'y' => $y, 'reference' => 'top-center');\r
- $this->update_boundaryBox($label['boundary_box'], $coords);\r
- $this->print_TTF($label);\r
-}\r
-\r
-function draw_zero_axis_left() {\r
- $colour = $this->parameter['zero_axis'];\r
- if ($colour == 'none') return;\r
- // draw zero axis on left hand side\r
- $this->calculated['zero_axis'] = round($this->calculated['boundary_box']['top'] + ($this->calculated['y_axis_left']['max'] * $this->calculated['y_axis_left']['factor']));\r
- ImageLine($this->image, $this->calculated['boundary_box']['left'], $this->calculated['zero_axis'], $this->calculated['boundary_box']['right'], $this->calculated['zero_axis'], $this->colour[$colour]);\r
-}\r
-\r
-function draw_zero_axis_right() {\r
- $colour = $this->parameter['zero_axis'];\r
- if ($colour == 'none') return;\r
- // draw zero axis on right hand side\r
- $this->calculated['zero_axis'] = round($this->calculated['boundary_box']['top'] + ($this->calculated['y_axis_right']['max'] * $this->calculated['y_axis_right']['factor']));\r
- ImageLine($this->image, $this->calculated['boundary_box']['left'], $this->calculated['zero_axis'], $this->calculated['boundary_box']['right'], $this->calculated['zero_axis'], $this->colour[$colour]);\r
-}\r
-\r
-function draw_x_axis() {\r
- $gridColour = $this->colour[$this->parameter['grid_colour']];\r
- $tickColour = $this->colour[$this->parameter['x_ticks_colour']];\r
- $axis_colour = $this->parameter['axis_colour'];\r
- $xGrid = $this->parameter['x_grid'];\r
- $gridTop = $this->calculated['boundary_box']['top'];\r
- $gridBottom = $this->calculated['boundary_box']['bottom'];\r
-\r
- if ($this->parameter['tick_length'] >= 0) {\r
- $tickTop = $this->calculated['boundary_box']['bottom'] - $this->parameter['tick_length'];\r
- $tickBottom = $this->calculated['boundary_box']['bottom'];\r
- $textBottom = $tickBottom + $this->calculated['bottom_inner_padding'];\r
- } else {\r
- $tickTop = $this->calculated['boundary_box']['bottom'];\r
- $tickBottom = $this->calculated['boundary_box']['bottom'] - $this->parameter['tick_length'];\r
- $textBottom = $tickBottom + $this->calculated['bottom_inner_padding'];\r
- }\r
-\r
- $axis_font = $this->parameter['axis_font'];\r
- $axis_size = $this->parameter['axis_size'];\r
- $axis_angle = $this->parameter['x_axis_angle'];\r
-\r
- if ($axis_angle == 0) $reference = 'top-center';\r
- if ($axis_angle > 0) $reference = 'top-right';\r
- if ($axis_angle < 0) $reference = 'top-left';\r
- if ($axis_angle == 90) $reference = 'top-center';\r
-\r
- //generic tag information. applies to all axis text.\r
- $axisTag = array('points' => $axis_size, 'angle' => $axis_angle, 'font' => $axis_font, 'colour' => $axis_colour);\r
-\r
- foreach ($this->calculated['x_axis']['tick_x'] as $set => $tickX) {\r
- // draw x grid if colour specified\r
- if ($xGrid != 'none') {\r
- switch ($xGrid) {\r
- case 'line':\r
- ImageLine($this->image, round($tickX), round($gridTop), round($tickX), round($gridBottom), $gridColour);\r
- break;\r
- case 'dash':\r
- ImageDashedLine($this->image, round($tickX), round($gridTop), round($tickX), round($gridBottom), $gridColour);\r
- break;\r
- }\r
- }\r
-\r
- if ($this->parameter['x_axis_text'] && !($set % $this->parameter['x_axis_text'])) { // test if tick should be displayed\r
- // draw tick\r
- if ($tickColour != 'none')\r
- ImageLine($this->image, round($tickX), round($tickTop), round($tickX), round($tickBottom), $tickColour);\r
-\r
- // draw axis text\r
- $coords = array('x' => $tickX, 'y' => $textBottom, 'reference' => $reference);\r
- $axisTag['text'] = $this->calculated['x_axis']['text'][$set];\r
- $axisTag['boundary_box'] = $this->calculated['x_axis']['boundary_box'][$set];\r
- $this->update_boundaryBox($axisTag['boundary_box'], $coords);\r
- $this->print_TTF($axisTag);\r
- }\r
- }\r
-}\r
-\r
-function draw_y_axis() {\r
- $gridColour = $this->colour[$this->parameter['grid_colour']];\r
- $tickColour = $this->colour[$this->parameter['y_ticks_colour']];\r
- $axis_colour = $this->parameter['axis_colour'];\r
- $yGrid = $this->parameter['y_grid'];\r
- $gridLeft = $this->calculated['boundary_box']['left'];\r
- $gridRight = $this->calculated['boundary_box']['right'];\r
-\r
- // axis font information\r
- $axis_font = $this->parameter['axis_font'];\r
- $axis_size = $this->parameter['axis_size'];\r
- $axis_angle = $this->parameter['y_axis_angle'];\r
- $axisTag = array('points' => $axis_size, 'angle' => $axis_angle, 'font' => $axis_font, 'colour' => $axis_colour);\r
-\r
-\r
- if ($this->calculated['y_axis_left']['has_data']) {\r
- // LEFT HAND SIDE\r
- // left and right coords for ticks\r
- if ($this->parameter['tick_length'] >= 0) {\r
- $tickLeft = $this->calculated['boundary_box']['left'];\r
- $tickRight = $this->calculated['boundary_box']['left'] + $this->parameter['tick_length'];\r
- } else {\r
- $tickLeft = $this->calculated['boundary_box']['left'] + $this->parameter['tick_length'];\r
- $tickRight = $this->calculated['boundary_box']['left'];\r
- }\r
- $textRight = $tickLeft - $this->calculated['left_inner_padding'];\r
-\r
- if ($axis_angle == 0) $reference = 'right-center';\r
- if ($axis_angle > 0) $reference = 'right-top';\r
- if ($axis_angle < 0) $reference = 'right-bottom';\r
- if ($axis_angle == 90) $reference = 'right-center';\r
-\r
- foreach ($this->calculated['y_axis']['tick_y'] as $set => $tickY) {\r
- // draw y grid if colour specified\r
- if ($yGrid != 'none') {\r
- switch ($yGrid) {\r
- case 'line':\r
- ImageLine($this->image, round($gridLeft), round($tickY), round($gridRight), round($tickY), $gridColour);\r
- break;\r
- case 'dash':\r
- ImageDashedLine($this->image, round($gridLeft), round($tickY), round($gridRight), round($tickY), $gridColour);\r
- break;\r
- }\r
- }\r
-\r
- // y axis text\r
- if ($this->parameter['y_axis_text_left'] && !($set % $this->parameter['y_axis_text_left'])) { // test if tick should be displayed\r
- // draw tick\r
- if ($tickColour != 'none')\r
- ImageLine($this->image, round($tickLeft), round($tickY), round($tickRight), round($tickY), $tickColour);\r
-\r
- // draw axis text...\r
- $coords = array('x' => $textRight, 'y' => $tickY, 'reference' => $reference);\r
- $axisTag['text'] = $this->calculated['y_axis_left']['text'][$set];\r
- $axisTag['boundary_box'] = $this->calculated['y_axis_left']['boundary_box'][$set];\r
- $this->update_boundaryBox($axisTag['boundary_box'], $coords);\r
- $this->print_TTF($axisTag);\r
- }\r
- }\r
- }\r
-\r
- if ($this->calculated['y_axis_right']['has_data']) {\r
- // RIGHT HAND SIDE\r
- // left and right coords for ticks\r
- if ($this->parameter['tick_length'] >= 0) {\r
- $tickLeft = $this->calculated['boundary_box']['right'] - $this->parameter['tick_length'];\r
- $tickRight = $this->calculated['boundary_box']['right'];\r
- } else {\r
- $tickLeft = $this->calculated['boundary_box']['right'];\r
- $tickRight = $this->calculated['boundary_box']['right'] - $this->parameter['tick_length'];\r
- }\r
- $textLeft = $tickRight+ $this->calculated['left_inner_padding'];\r
-\r
- if ($axis_angle == 0) $reference = 'left-center';\r
- if ($axis_angle > 0) $reference = 'left-bottom';\r
- if ($axis_angle < 0) $reference = 'left-top';\r
- if ($axis_angle == 90) $reference = 'left-center';\r
-\r
- foreach ($this->calculated['y_axis']['tick_y'] as $set => $tickY) {\r
- if (!$this->calculated['y_axis_left']['has_data'] && $yGrid != 'none') { // draw grid if not drawn already (above)\r
- switch ($yGrid) {\r
- case 'line':\r
- ImageLine($this->image, round($gridLeft), round($tickY), round($gridRight), round($tickY), $gridColour);\r
- break;\r
- case 'dash':\r
- ImageDashedLine($this->image, round($gridLeft), round($tickY), round($gridRight), round($tickY), $gridColour);\r
- break;\r
- }\r
- }\r
-\r
- if ($this->parameter['y_axis_text_right'] && !($set % $this->parameter['y_axis_text_right'])) { // test if tick should be displayed\r
- // draw tick\r
- if ($tickColour != 'none')\r
- ImageLine($this->image, round($tickLeft), round($tickY), round($tickRight), round($tickY), $tickColour);\r
-\r
- // draw axis text...\r
- $coords = array('x' => $textLeft, 'y' => $tickY, 'reference' => $reference);\r
- $axisTag['text'] = $this->calculated['y_axis_right']['text'][$set];\r
- $axisTag['boundary_box'] = $this->calculated['y_axis_left']['boundary_box'][$set];\r
- $this->update_boundaryBox($axisTag['boundary_box'], $coords);\r
- $this->print_TTF($axisTag);\r
- }\r
- }\r
- }\r
-}\r
-\r
-function init_data() {\r
- $this->calculated['y_plot'] = array(); // array to hold pixel plotting coords for y axis\r
- $height = $this->calculated['boundary_box']['bottom'] - $this->calculated['boundary_box']['top'];\r
- $width = $this->calculated['boundary_box']['right'] - $this->calculated['boundary_box']['left'];\r
-\r
- // calculate pixel steps between axis ticks.\r
- $this->calculated['y_axis']['step'] = $height / ($this->parameter['y_axis_gridlines'] - 1);\r
-\r
- // calculate x ticks spacing taking into account x offset for ticks.\r
- $extraTick = 2 * $this->parameter['x_offset']; // extra tick to account for padding\r
- $numTicks = $this->calculated['x_axis']['num_ticks'] - 1; // number of x ticks\r
-\r
- $this->calculated['x_axis']['step'] = $width / ($numTicks + $extraTick);\r
- $widthPlot = $width - ($this->calculated['x_axis']['step'] * $extraTick);\r
- $this->calculated['x_axis']['step'] = $widthPlot / $numTicks;\r
-\r
- //calculate factor for transforming x,y physical coords to logical coords for right hand y_axis.\r
- $y_range = $this->calculated['y_axis_right']['max'] - $this->calculated['y_axis_right']['min'];\r
- $y_range = ($y_range ? $y_range : 1);\r
- $this->calculated['y_axis_right']['factor'] = $height / $y_range;\r
-\r
- //calculate factor for transforming x,y physical coords to logical coords for left hand axis.\r
- $yRange = $this->calculated['y_axis_left']['max'] - $this->calculated['y_axis_left']['min'];\r
- $yRange = ($yRange ? $yRange : 1);\r
- $this->calculated['y_axis_left']['factor'] = $height / $yRange;\r
- if ($this->parameter['x_axis_gridlines'] != 'auto') {\r
- $xRange = $this->calculated['x_axis']['max'] - $this->calculated['x_axis']['min'];\r
- $xRange = ($xRange ? $xRange : 1);\r
- $this->calculated['x_axis']['factor'] = $widthPlot / $xRange;\r
- }\r
-\r
- //expand_pre($this->calculated['boundary_box']);\r
- // cycle thru all data sets...\r
- $this->calculated['num_bars'] = 0;\r
- foreach ($this->y_order as $order => $set) {\r
- // determine how many bars there are\r
- if (isset($this->y_format[$set]['bar']) && ($this->y_format[$set]['bar'] != 'none')) {\r
- $this->calculated['bar_offset_index'][$set] = $this->calculated['num_bars']; // index to relate bar with data set.\r
- $this->calculated['num_bars']++;\r
- }\r
-\r
- // calculate y coords for plotting data\r
- foreach ($this->x_data as $index => $x) {\r
- $this->calculated['y_plot'][$set][$index] = $this->y_data[$set][$index];\r
-\r
- if ((string)$this->y_data[$set][$index] != 'none') {\r
-\r
- if (isset($this->y_format[$set]['y_axis']) && $this->y_format[$set]['y_axis'] == 'right') {\r
- $this->calculated['y_plot'][$set][$index] =\r
- round(($this->y_data[$set][$index] - $this->calculated['y_axis_right']['min'])\r
- * $this->calculated['y_axis_right']['factor']);\r
- } else {\r
- //print "$set $index<BR>";\r
- $this->calculated['y_plot'][$set][$index] =\r
- round(($this->y_data[$set][$index] - $this->calculated['y_axis_left']['min'])\r
- * $this->calculated['y_axis_left']['factor']);\r
- }\r
-\r
- }\r
- }\r
- }\r
- //print "factor ".$this->calculated['x_axis']['factor']."<BR>";\r
- //expand_pre($this->calculated['x_plot']);\r
-\r
- // calculate bar parameters if bars are to be drawn.\r
- if ($this->calculated['num_bars']) {\r
- $xStep = $this->calculated['x_axis']['step'];\r
- $totalWidth = $this->calculated['x_axis']['step'] - $this->parameter['bar_spacing'];\r
- $barWidth = $totalWidth / $this->calculated['num_bars'];\r
-\r
- $barX = ($barWidth - $totalWidth) / 2; // starting x offset\r
- for ($i=0; $i < $this->calculated['num_bars']; $i++) {\r
- $this->calculated['bar_offset_x'][$i] = $barX;\r
- $barX += $barWidth; // add width of bar to x offset.\r
- }\r
- $this->calculated['bar_width'] = $barWidth;\r
- }\r
-\r
-\r
-}\r
-\r
-function init_x_ticks() {\r
- // get coords for x axis ticks and data plots\r
- //$xGrid = $this->parameter['x_grid'];\r
- $xStep = $this->calculated['x_axis']['step'];\r
- $ticksOffset = $this->parameter['x_offset']; // where to start drawing ticks relative to y axis.\r
- $gridLeft = $this->calculated['boundary_box']['left'] + ($xStep * $ticksOffset); // grid x start\r
- $tickX = $gridLeft; // tick x coord\r
-\r
- foreach ($this->calculated['x_axis']['text'] as $set => $value) {\r
- //print "index: $set<BR>";\r
- // x tick value\r
- $this->calculated['x_axis']['tick_x'][$set] = $tickX;\r
- // if num ticks is auto then x plot value is same as x tick\r
- if ($this->parameter['x_axis_gridlines'] == 'auto') $this->calculated['x_plot'][$set] = round($tickX);\r
- //print $this->calculated['x_plot'][$set].'<BR>';\r
- $tickX += $xStep;\r
- }\r
-\r
- //print "xStep: $xStep <BR>";\r
- // if numeric x axis then calculate x coords for each data point. this is seperate from x ticks.\r
- $gridX = $gridLeft;\r
- if (empty($this->calculated['x_axis']['factor'])) {\r
- $this->calculated['x_axis']['factor'] = 0;\r
- }\r
- if (empty($this->calculated['x_axis']['min'])) {\r
- $this->calculated['x_axis']['min'] = 0;\r
- }\r
- $factor = $this->calculated['x_axis']['factor'];\r
- $min = $this->calculated['x_axis']['min'];\r
-\r
- if ($this->parameter['x_axis_gridlines'] != 'auto') {\r
- foreach ($this->x_data as $index => $x) {\r
- //print "index: $index, x: $x<BR>";\r
- $offset = $x - $this->calculated['x_axis']['min'];\r
-\r
- //$gridX = ($offset * $this->calculated['x_axis']['factor']);\r
- //print "offset: $offset <BR>";\r
- //$this->calculated['x_plot'][$set] = $gridLeft + ($offset * $this->calculated['x_axis']['factor']);\r
-\r
- $this->calculated['x_plot'][$index] = $gridLeft + ($x - $min) * $factor;\r
-\r
- //print $this->calculated['x_plot'][$set].'<BR>';\r
- }\r
- }\r
- //expand_pre($this->calculated['boundary_box']);\r
- //print "factor ".$this->calculated['x_axis']['factor']."<BR>";\r
- //expand_pre($this->calculated['x_plot']);\r
-}\r
-\r
-function init_y_ticks() {\r
- // get coords for y axis ticks\r
-\r
- $yStep = $this->calculated['y_axis']['step'];\r
- $gridBottom = $this->calculated['boundary_box']['bottom'];\r
- $tickY = $gridBottom; // tick y coord\r
-\r
- for ($i = 0; $i < $this->parameter['y_axis_gridlines']; $i++) {\r
- $this->calculated['y_axis']['tick_y'][$i] = $tickY;\r
- $tickY -= $yStep;\r
- }\r
-\r
-}\r
-\r
-function init_labels() {\r
- if ($this->parameter['title']) {\r
- $size = $this->get_boundaryBox(\r
- array('points' => $this->parameter['title_size'],\r
- 'angle' => 0,\r
- 'font' => $this->parameter['title_font'],\r
- 'text' => $this->parameter['title']));\r
- $this->calculated['title']['boundary_box'] = $size;\r
- $this->calculated['title']['text'] = $this->parameter['title'];\r
- $this->calculated['title']['font'] = $this->parameter['title_font'];\r
- $this->calculated['title']['points'] = $this->parameter['title_size'];\r
- $this->calculated['title']['colour'] = $this->parameter['title_colour'];\r
- $this->calculated['title']['angle'] = 0;\r
-\r
- $this->calculated['boundary_box']['top'] += $size['height'] + $this->parameter['outer_padding'];\r
- //$this->calculated['boundary_box']['top'] += $size['height'];\r
-\r
- } else $this->calculated['title']['boundary_box'] = $this->get_null_size();\r
-\r
- if ($this->parameter['y_label_left']) {\r
- $this->calculated['y_label_left']['text'] = $this->parameter['y_label_left'];\r
- $this->calculated['y_label_left']['angle'] = $this->parameter['y_label_angle'];\r
- $this->calculated['y_label_left']['font'] = $this->parameter['label_font'];\r
- $this->calculated['y_label_left']['points'] = $this->parameter['label_size'];\r
- $this->calculated['y_label_left']['colour'] = $this->parameter['label_colour'];\r
-\r
- $size = $this->get_boundaryBox($this->calculated['y_label_left']);\r
- $this->calculated['y_label_left']['boundary_box'] = $size;\r
- //$this->calculated['boundary_box']['left'] += $size['width'] + $this->parameter['inner_padding'];\r
- $this->calculated['boundary_box']['left'] += $size['width'];\r
-\r
- } else $this->calculated['y_label_left']['boundary_box'] = $this->get_null_size();\r
-\r
- if ($this->parameter['y_label_right']) {\r
- $this->calculated['y_label_right']['text'] = $this->parameter['y_label_right'];\r
- $this->calculated['y_label_right']['angle'] = $this->parameter['y_label_angle'];\r
- $this->calculated['y_label_right']['font'] = $this->parameter['label_font'];\r
- $this->calculated['y_label_right']['points'] = $this->parameter['label_size'];\r
- $this->calculated['y_label_right']['colour'] = $this->parameter['label_colour'];\r
-\r
- $size = $this->get_boundaryBox($this->calculated['y_label_right']);\r
- $this->calculated['y_label_right']['boundary_box'] = $size;\r
- //$this->calculated['boundary_box']['right'] -= $size['width'] + $this->parameter['inner_padding'];\r
- $this->calculated['boundary_box']['right'] -= $size['width'];\r
-\r
- } else $this->calculated['y_label_right']['boundary_box'] = $this->get_null_size();\r
-\r
- if ($this->parameter['x_label']) {\r
- $this->calculated['x_label']['text'] = $this->parameter['x_label'];\r
- $this->calculated['x_label']['angle'] = $this->parameter['x_label_angle'];\r
- $this->calculated['x_label']['font'] = $this->parameter['label_font'];\r
- $this->calculated['x_label']['points'] = $this->parameter['label_size'];\r
- $this->calculated['x_label']['colour'] = $this->parameter['label_colour'];\r
-\r
- $size = $this->get_boundaryBox($this->calculated['x_label']);\r
- $this->calculated['x_label']['boundary_box'] = $size;\r
- //$this->calculated['boundary_box']['bottom'] -= $size['height'] + $this->parameter['inner_padding'];\r
- $this->calculated['boundary_box']['bottom'] -= $size['height'];\r
-\r
- } else $this->calculated['x_label']['boundary_box'] = $this->get_null_size();\r
-\r
-}\r
-\r
-\r
-function init_legend() {\r
- $this->calculated['legend'] = array(); // array to hold calculated values for legend.\r
- //$this->calculated['legend']['boundary_box_max'] = array('height' => 0, 'width' => 0);\r
- $this->calculated['legend']['boundary_box_max'] = $this->get_null_size();\r
- if ($this->parameter['legend'] == 'none') return;\r
-\r
- $position = $this->parameter['legend'];\r
- $numSets = 0; // number of data sets with legends.\r
- $sumTextHeight = 0; // total of height of all legend text items.\r
- $width = 0;\r
- $height = 0;\r
-\r
- foreach ($this->y_order as $set) {\r
- $text = isset($this->y_format[$set]['legend']) ? $this->y_format[$set]['legend'] : 'none';\r
- $size = $this->get_boundaryBox(\r
- array('points' => $this->parameter['legend_size'],\r
- 'angle' => 0,\r
- 'font' => $this->parameter['legend_font'],\r
- 'text' => $text));\r
-\r
- $this->calculated['legend']['boundary_box'][$set] = $size;\r
- $this->calculated['legend']['text'][$set] = $text;\r
- //$this->calculated['legend']['font'][$set] = $this->parameter['legend_font'];\r
- //$this->calculated['legend']['points'][$set] = $this->parameter['legend_size'];\r
- //$this->calculated['legend']['angle'][$set] = 0;\r
-\r
- if ($text && $text!='none') {\r
- $numSets++;\r
- $sumTextHeight += $size['height'];\r
- }\r
-\r
- if ($size['width'] > $this->calculated['legend']['boundary_box_max']['width'])\r
- $this->calculated['legend']['boundary_box_max'] = $size;\r
- }\r
-\r
- $offset = $this->parameter['legend_offset']; // offset in pixels of legend box from graph border.\r
- $padding = $this->parameter['legend_padding']; // padding in pixels around legend text.\r
- $textWidth = $this->calculated['legend']['boundary_box_max']['width']; // width of largest legend item.\r
- $textHeight = $this->calculated['legend']['boundary_box_max']['height']; // use height as size to use for colour square in legend.\r
- $width = $padding * 2 + $textWidth + $textHeight * 2; // left and right padding + maximum text width + space for square\r
- $height = $padding * ($numSets + 1) + $sumTextHeight; // top and bottom padding + padding between text + text.\r
-\r
-\r
- $this->calculated['legend']['boundary_box_all'] = array('width' => $width,\r
- 'height' => $height,\r
- 'offset' => $offset,\r
- 'reference' => $position);\r
-\r
- switch ($position) { // move in right or bottom if legend is outside data plotting area.\r
- case 'outside-top' :\r
- $this->calculated['boundary_box']['right'] -= $offset + $width; // move in right hand side\r
- break;\r
-\r
- case 'outside-bottom' :\r
- $this->calculated['boundary_box']['right'] -= $offset + $width; // move in right hand side\r
- break;\r
-\r
- case 'outside-left' :\r
- $this->calculated['boundary_box']['bottom'] -= $offset + $height; // move in right hand side\r
- break;\r
-\r
- case 'outside-right' :\r
- $this->calculated['boundary_box']['bottom'] -= $offset + $height; // move in right hand side\r
- break;\r
- }\r
-}\r
-\r
-function init_y_axis() {\r
- $this->calculated['y_axis_left'] = array(); // array to hold calculated values for y_axis on left.\r
- $this->calculated['y_axis_left']['boundary_box_max'] = $this->get_null_size();\r
- $this->calculated['y_axis_right'] = array(); // array to hold calculated values for y_axis on right.\r
- $this->calculated['y_axis_right']['boundary_box_max'] = $this->get_null_size();\r
-\r
- $axis_font = $this->parameter['axis_font'];\r
- $axis_size = $this->parameter['axis_size'];\r
- $axis_colour = $this->parameter['axis_colour'];\r
- $axis_angle = $this->parameter['y_axis_angle'];\r
- $y_tick_labels = $this->y_tick_labels;\r
-\r
- $this->calculated['y_axis_left']['has_data'] = FALSE;\r
- $this->calculated['y_axis_right']['has_data'] = FALSE;\r
-\r
- // find min and max y values.\r
- $minLeft = $this->parameter['y_min_left'];\r
- $maxLeft = $this->parameter['y_max_left'];\r
- $minRight = $this->parameter['y_min_right'];\r
- $maxRight = $this->parameter['y_max_right'];\r
- $dataLeft = array();\r
- $dataRight = array();\r
- foreach ($this->y_order as $order => $set) {\r
- if (isset($this->y_format[$set]['y_axis']) && $this->y_format[$set]['y_axis'] == 'right') {\r
- $this->calculated['y_axis_right']['has_data'] = TRUE;\r
- $dataRight = array_merge($dataRight, $this->y_data[$set]);\r
- } else {\r
- $this->calculated['y_axis_left']['has_data'] = TRUE;\r
- $dataLeft = array_merge($dataLeft, $this->y_data[$set]);\r
- }\r
- }\r
- $dataLeftRange = $this->find_range($dataLeft, $minLeft, $maxLeft, $this->parameter['y_resolution_left']);\r
- $dataRightRange = $this->find_range($dataRight, $minRight, $maxRight, $this->parameter['y_resolution_right']);\r
- $minLeft = $dataLeftRange['min'];\r
- $maxLeft = $dataLeftRange['max'];\r
- $minRight = $dataRightRange['min'];\r
- $maxRight = $dataRightRange['max'];\r
-\r
- $this->calculated['y_axis_left']['min'] = $minLeft;\r
- $this->calculated['y_axis_left']['max'] = $maxLeft;\r
- $this->calculated['y_axis_right']['min'] = $minRight;\r
- $this->calculated['y_axis_right']['max'] = $maxRight;\r
-\r
- $stepLeft = ($maxLeft - $minLeft) / ($this->parameter['y_axis_gridlines'] - 1);\r
- $startLeft = $minLeft;\r
- $step_right = ($maxRight - $minRight) / ($this->parameter['y_axis_gridlines'] - 1);\r
- $start_right = $minRight;\r
-\r
- if ($this->parameter['y_axis_text_left']) {\r
- for ($i = 0; $i < $this->parameter['y_axis_gridlines']; $i++) { // calculate y axis text sizes\r
- // left y axis\r
- if ($y_tick_labels) {\r
- $value = $y_tick_labels[$i];\r
- } else {\r
- $value = number_format($startLeft, $this->parameter['y_decimal_left'], $this->parameter['decimal_point'], $this->parameter['thousand_sep']);\r
- }\r
- $this->calculated['y_axis_left']['data'][$i] = $startLeft;\r
- $this->calculated['y_axis_left']['text'][$i] = $value; // text is formatted raw data\r
-\r
- $size = $this->get_boundaryBox(\r
- array('points' => $axis_size,\r
- 'font' => $axis_font,\r
- 'angle' => $axis_angle,\r
- 'colour' => $axis_colour,\r
- 'text' => $value));\r
- $this->calculated['y_axis_left']['boundary_box'][$i] = $size;\r
-\r
- if ($size['height'] > $this->calculated['y_axis_left']['boundary_box_max']['height'])\r
- $this->calculated['y_axis_left']['boundary_box_max']['height'] = $size['height'];\r
- if ($size['width'] > $this->calculated['y_axis_left']['boundary_box_max']['width'])\r
- $this->calculated['y_axis_left']['boundary_box_max']['width'] = $size['width'];\r
-\r
- $startLeft += $stepLeft;\r
- }\r
- $this->calculated['boundary_box']['left'] += $this->calculated['y_axis_left']['boundary_box_max']['width']\r
- + $this->parameter['inner_padding'];\r
- }\r
-\r
- if ($this->parameter['y_axis_text_right']) {\r
- for ($i = 0; $i < $this->parameter['y_axis_gridlines']; $i++) { // calculate y axis text sizes\r
- // right y axis\r
- $value = number_format($start_right, $this->parameter['y_decimal_right'], $this->parameter['decimal_point'], $this->parameter['thousand_sep']);\r
- $this->calculated['y_axis_right']['data'][$i] = $start_right;\r
- $this->calculated['y_axis_right']['text'][$i] = $value; // text is formatted raw data\r
- $size = $this->get_boundaryBox(\r
- array('points' => $axis_size,\r
- 'font' => $axis_font,\r
- 'angle' => $axis_angle,\r
- 'colour' => $axis_colour,\r
- 'text' => $value));\r
- $this->calculated['y_axis_right']['boundary_box'][$i] = $size;\r
-\r
- if ($size['height'] > $this->calculated['y_axis_right']['boundary_box_max']['height'])\r
- $this->calculated['y_axis_right']['boundary_box_max'] = $size;\r
- if ($size['width'] > $this->calculated['y_axis_right']['boundary_box_max']['width'])\r
- $this->calculated['y_axis_right']['boundary_box_max']['width'] = $size['width'];\r
-\r
- $start_right += $step_right;\r
- }\r
- $this->calculated['boundary_box']['right'] -= $this->calculated['y_axis_right']['boundary_box_max']['width']\r
- + $this->parameter['inner_padding'];\r
- }\r
-}\r
-\r
-function init_x_axis() {\r
- $this->calculated['x_axis'] = array(); // array to hold calculated values for x_axis.\r
- $this->calculated['x_axis']['boundary_box_max'] = array('height' => 0, 'width' => 0);\r
-\r
- $axis_font = $this->parameter['axis_font'];\r
- $axis_size = $this->parameter['axis_size'];\r
- $axis_colour = $this->parameter['axis_colour'];\r
- $axis_angle = $this->parameter['x_axis_angle'];\r
-\r
- // check whether to treat x axis as numeric\r
- if ($this->parameter['x_axis_gridlines'] == 'auto') { // auto means text based x_axis, not numeric...\r
- $this->calculated['x_axis']['num_ticks'] = sizeof($this->x_data);\r
- $data = $this->x_data;\r
- for ($i=0; $i < $this->calculated['x_axis']['num_ticks']; $i++) {\r
- $value = array_shift($data); // grab value from begin of array\r
- $this->calculated['x_axis']['data'][$i] = $value;\r
- $this->calculated['x_axis']['text'][$i] = $value; // raw data and text are both the same in this case\r
- $size = $this->get_boundaryBox(\r
- array('points' => $axis_size,\r
- 'font' => $axis_font,\r
- 'angle' => $axis_angle,\r
- 'colour' => $axis_colour,\r
- 'text' => $value));\r
- $this->calculated['x_axis']['boundary_box'][$i] = $size;\r
- if ($size['height'] > $this->calculated['x_axis']['boundary_box_max']['height'])\r
- $this->calculated['x_axis']['boundary_box_max'] = $size;\r
- }\r
-\r
- } else { // x axis is numeric so find max min values...\r
- $this->calculated['x_axis']['num_ticks'] = $this->parameter['x_axis_gridlines'];\r
-\r
- $min = $this->parameter['x_min'];\r
- $max = $this->parameter['x_max'];\r
- $data = array();\r
- $data = $this->find_range($this->x_data, $min, $max, $this->parameter['x_resolution']);\r
- $min = $data['min'];\r
- $max = $data['max'];\r
- $this->calculated['x_axis']['min'] = $min;\r
- $this->calculated['x_axis']['max'] = $max;\r
-\r
- $step = ($max - $min) / ($this->calculated['x_axis']['num_ticks'] - 1);\r
- $start = $min;\r
-\r
- for ($i = 0; $i < $this->calculated['x_axis']['num_ticks']; $i++) { // calculate x axis text sizes\r
- $value = number_format($start, $this->parameter['xDecimal'], $this->parameter['decimal_point'], $this->parameter['thousand_sep']);\r
- $this->calculated['x_axis']['data'][$i] = $start;\r
- $this->calculated['x_axis']['text'][$i] = $value; // text is formatted raw data\r
-\r
- $size = $this->get_boundaryBox(\r
- array('points' => $axis_size,\r
- 'font' => $axis_font,\r
- 'angle' => $axis_angle,\r
- 'colour' => $axis_colour,\r
- 'text' => $value));\r
- $this->calculated['x_axis']['boundary_box'][$i] = $size;\r
-\r
- if ($size['height'] > $this->calculated['x_axis']['boundary_box_max']['height'])\r
- $this->calculated['x_axis']['boundary_box_max'] = $size;\r
-\r
- $start += $step;\r
- }\r
- }\r
- if ($this->parameter['x_axis_text'])\r
- $this->calculated['boundary_box']['bottom'] -= $this->calculated['x_axis']['boundary_box_max']['height']\r
- + $this->parameter['inner_padding'];\r
-}\r
-\r
-// find max and min values for a data array given the resolution.\r
-function find_range($data, $min, $max, $resolution) {\r
- if (sizeof($data) == 0 ) return array('min' => 0, 'max' => 0);\r
- foreach ($data as $key => $value) {\r
- if ($value=='none') continue;\r
- if ($value > $max) $max = $value;\r
- if ($value < $min) $min = $value;\r
- }\r
-\r
- if ($max == 0) {\r
- $factor = 1;\r
- } else {\r
- if ($max < 0) $factor = - pow(10, (floor(log10(abs($max))) + $resolution) );\r
- else $factor = pow(10, (floor(log10(abs($max))) - $resolution) );\r
- }\r
- $factor = round($factor * 1000.0) / 1000.0; // To avoid some wierd rounding errors (Moodle)\r
-\r
- $max = $factor * @ceil($max / $factor);\r
- $min = $factor * @floor($min / $factor);\r
-\r
- //print "max=$max, min=$min<BR>";\r
-\r
- return array('min' => $min, 'max' => $max);\r
-}\r
-\r
-function graph() {\r
- if (func_num_args() == 2) {\r
- $this->parameter['width'] = func_get_arg(0);\r
- $this->parameter['height'] = func_get_arg(1);\r
- }\r
- //$this->boundaryBox = array(\r
- $this->calculated['boundary_box'] = array(\r
- 'left' => 0,\r
- 'top' => 0,\r
- 'right' => $this->parameter['width'] - 1,\r
- 'bottom' => $this->parameter['height'] - 1);\r
-\r
- $this->init_colours();\r
-\r
- //ImageColorTransparent($this->image, $this->colour['white']); // colour for transparency\r
-}\r
-\r
-function print_TTF($message) {\r
- $points = $message['points'];\r
- $angle = $message['angle'];\r
- $text = $message['text'];\r
- $colour = $this->colour[$message['colour']];\r
- $font = $this->parameter['path_to_fonts'].$message['font'];\r
-\r
- $x = $message['boundary_box']['x'];\r
- $y = $message['boundary_box']['y'];\r
- $offsetX = $message['boundary_box']['offsetX'];\r
- $offsetY = $message['boundary_box']['offsetY'];\r
- $height = $message['boundary_box']['height'];\r
- $width = $message['boundary_box']['width'];\r
- $reference = $message['boundary_box']['reference'];\r
-\r
- switch ($reference) {\r
- case 'top-left':\r
- case 'left-top':\r
- $y += $height - $offsetY;\r
- //$y += $offsetY;\r
- $x += $offsetX;\r
- break;\r
- case 'left-center':\r
- $y += ($height / 2) - $offsetY;\r
- $x += $offsetX;\r
- break;\r
- case 'left-bottom':\r
- $y -= $offsetY;\r
- $x += $offsetX;\r
- break;\r
- case 'top-center':\r
- $y += $height - $offsetY;\r
- $x -= ($width / 2) - $offsetX;\r
- break;\r
- case 'top-right':\r
- case 'right-top':\r
- $y += $height - $offsetY;\r
- $x -= $width - $offsetX;\r
- break;\r
- case 'right-center':\r
- $y += ($height / 2) - $offsetY;\r
- $x -= $width - $offsetX;\r
- break;\r
- case 'right-bottom':\r
- $y -= $offsetY;\r
- $x -= $width - $offsetX;\r
- break;\r
- case 'bottom-center':\r
- $y -= $offsetY;\r
- $x -= ($width / 2) - $offsetX;\r
- break;\r
- default:\r
- $y = 0;\r
- $x = 0;\r
- break;\r
- }\r
- if ($this->parameter['lang_decode']) { // Moodle addition\r
- include_once($this->parameter['lang_decode']);\r
- $text = lang_decode($text);\r
- }\r
- ImageTTFText($this->image, $points, $angle, $x, $y, $colour, $font, $text);\r
-}\r
-\r
-// move boundaryBox to coordinates specified\r
-function update_boundaryBox(&$boundaryBox, $coords) {\r
- $width = $boundaryBox['width'];\r
- $height = $boundaryBox['height'];\r
- $x = $coords['x'];\r
- $y = $coords['y'];\r
- $reference = $coords['reference'];\r
- switch ($reference) {\r
- case 'top-left':\r
- case 'left-top':\r
- $top = $y;\r
- $bottom = $y + $height;\r
- $left = $x;\r
- $right = $x + $width;\r
- break;\r
- case 'left-center':\r
- $top = $y - ($height / 2);\r
- $bottom = $y + ($height / 2);\r
- $left = $x;\r
- $right = $x + $width;\r
- break;\r
- case 'left-bottom':\r
- $top = $y - $height;\r
- $bottom = $y;\r
- $left = $x;\r
- $right = $x + $width;\r
- break;\r
- case 'top-center':\r
- $top = $y;\r
- $bottom = $y + $height;\r
- $left = $x - ($width / 2);\r
- $right = $x + ($width / 2);\r
- break;\r
- case 'right-top':\r
- case 'top-right':\r
- $top = $y;\r
- $bottom = $y + $height;\r
- $left = $x - $width;\r
- $right = $x;\r
- break;\r
- case 'right-center':\r
- $top = $y - ($height / 2);\r
- $bottom = $y + ($height / 2);\r
- $left = $x - $width;\r
- $right = $x;\r
- break;\r
- case 'bottom=right':\r
- case 'right-bottom':\r
- $top = $y - $height;\r
- $bottom = $y;\r
- $left = $x - $width;\r
- $right = $x;\r
- break;\r
- default:\r
- $top = 0;\r
- $bottom = $height;\r
- $left = 0;\r
- $right = $width;\r
- break;\r
- }\r
-\r
- $boundaryBox = array_merge($boundaryBox, array('top' => $top,\r
- 'bottom' => $bottom,\r
- 'left' => $left,\r
- 'right' => $right,\r
- 'x' => $x,\r
- 'y' => $y,\r
- 'reference' => $reference));\r
-}\r
-\r
-function get_null_size() {\r
- return array('width' => 0,\r
- 'height' => 0,\r
- 'offsetX' => 0,\r
- 'offsetY' => 0,\r
- //'fontHeight' => 0\r
- );\r
-}\r
-\r
-function get_boundaryBox($message) {\r
- $points = $message['points'];\r
- $angle = $message['angle'];\r
- $font = $this->parameter['path_to_fonts'].$message['font'];\r
- $text = $message['text'];\r
-\r
- //print ('get_boundaryBox');\r
- //expandPre($message);\r
-\r
- // get font size\r
- $bounds = ImageTTFBBox($points, $angle, $font, "W");\r
- if ($angle < 0) {\r
- $fontHeight = abs($bounds[7]-$bounds[1]);\r
- } else if ($angle > 0) {\r
- $fontHeight = abs($bounds[1]-$bounds[7]);\r
- } else {\r
- $fontHeight = abs($bounds[7]-$bounds[1]);\r
- }\r
-\r
- // get boundary box and offsets for printing at an angle\r
- if ($this->parameter['lang_decode']) { // Moodle addition\r
- include_once($this->parameter['lang_decode']);\r
- $text = lang_decode($text);\r
- }\r
- $bounds = ImageTTFBBox($points, $angle, $font, $text);\r
-\r
- if ($angle < 0) {\r
- $width = abs($bounds[4]-$bounds[0]);\r
- $height = abs($bounds[3]-$bounds[7]);\r
- $offsetY = abs($bounds[3]-$bounds[1]);\r
- $offsetX = 0;\r
-\r
- } else if ($angle > 0) {\r
- $width = abs($bounds[2]-$bounds[6]);\r
- $height = abs($bounds[1]-$bounds[5]);\r
- $offsetY = 0;\r
- $offsetX = abs($bounds[0]-$bounds[6]);\r
-\r
- } else {\r
- $width = abs($bounds[4]-$bounds[6]);\r
- $height = abs($bounds[7]-$bounds[1]);\r
- $offsetY = 0;\r
- $offsetX = 0;\r
- }\r
-\r
- //return values\r
- return array('width' => $width,\r
- 'height' => $height,\r
- 'offsetX' => $offsetX,\r
- 'offsetY' => $offsetY,\r
- //'fontHeight' => $fontHeight\r
- );\r
-}\r
-\r
-function draw_rectangle($border, $colour, $type) {\r
- $colour = $this->colour[$colour];\r
- switch ($type) {\r
- case 'fill': // fill the rectangle\r
- ImageFilledRectangle($this->image, $border['left'], $border['top'], $border['right'], $border['bottom'], $colour);\r
- break;\r
- case 'box': // all sides\r
- ImageRectangle($this->image, $border['left'], $border['top'], $border['right'], $border['bottom'], $colour);\r
- break;\r
- case 'axis': // bottom x axis and left y axis\r
- ImageLine($this->image, $border['left'], $border['top'], $border['left'], $border['bottom'], $colour);\r
- ImageLine($this->image, $border['left'], $border['bottom'], $border['right'], $border['bottom'], $colour);\r
- break;\r
- case 'y': // left y axis only\r
- case 'y-left':\r
- ImageLine($this->image, $border['left'], $border['top'], $border['left'], $border['bottom'], $colour);\r
- break;\r
- case 'y-right': // right y axis only\r
- ImageLine($this->image, $border['right'], $border['top'], $border['right'], $border['bottom'], $colour);\r
- break;\r
- case 'x': // bottom x axis only\r
- ImageLine($this->image, $border['left'], $border['bottom'], $border['right'], $border['bottom'], $colour);\r
- break;\r
- case 'u': // u shaped. bottom x axis and both left and right y axis.\r
- ImageLine($this->image, $border['left'], $border['top'], $border['left'], $border['bottom'], $colour);\r
- ImageLine($this->image, $border['right'], $border['top'], $border['right'], $border['bottom'], $colour);\r
- ImageLine($this->image, $border['left'], $border['bottom'], $border['right'], $border['bottom'], $colour);\r
- break;\r
-\r
- }\r
-}\r
-\r
-function init_colours() {\r
- $this->image = ImageCreate($this->parameter['width'], $this->parameter['height']);\r
- // standard colours\r
- $this->colour['white'] = ImageColorAllocate ($this->image, 0xFF, 0xFF, 0xFF); // first colour is background colour.\r
- $this->colour['black'] = ImageColorAllocate ($this->image, 0x00, 0x00, 0x00);\r
- $this->colour['maroon'] = ImageColorAllocate ($this->image, 0x80, 0x00, 0x00);\r
- $this->colour['green'] = ImageColorAllocate ($this->image, 0x00, 0x80, 0x00);\r
- $this->colour['ltgreen'] = ImageColorAllocate ($this->image, 0x52, 0xF1, 0x7F);\r
- $this->colour['ltltgreen']= ImageColorAllocate ($this->image, 0x99, 0xFF, 0x99);\r
- $this->colour['olive'] = ImageColorAllocate ($this->image, 0x80, 0x80, 0x00);\r
- $this->colour['navy'] = ImageColorAllocate ($this->image, 0x00, 0x00, 0x80);\r
- $this->colour['purple'] = ImageColorAllocate ($this->image, 0x80, 0x00, 0x80);\r
- $this->colour['gray'] = ImageColorAllocate ($this->image, 0x80, 0x80, 0x80);\r
- $this->colour['red'] = ImageColorAllocate ($this->image, 0xFF, 0x00, 0x00);\r
- $this->colour['ltred'] = ImageColorAllocate ($this->image, 0xFF, 0x99, 0x99);\r
- $this->colour['ltltred'] = ImageColorAllocate ($this->image, 0xFF, 0xCC, 0xCC);\r
- $this->colour['orange'] = ImageColorAllocate ($this->image, 0xFF, 0x66, 0x00);\r
- $this->colour['ltorange'] = ImageColorAllocate ($this->image, 0xFF, 0x99, 0x66);\r
- $this->colour['ltltorange'] = ImageColorAllocate ($this->image, 0xFF, 0xcc, 0x99);\r
- $this->colour['lime'] = ImageColorAllocate ($this->image, 0x00, 0xFF, 0x00);\r
- $this->colour['yellow'] = ImageColorAllocate ($this->image, 0xFF, 0xFF, 0x00);\r
- $this->colour['blue'] = ImageColorAllocate ($this->image, 0x00, 0x00, 0xFF);\r
- $this->colour['ltblue'] = ImageColorAllocate ($this->image, 0x00, 0xCC, 0xFF);\r
- $this->colour['ltltblue'] = ImageColorAllocate ($this->image, 0x99, 0xFF, 0xFF);\r
- $this->colour['fuchsia'] = ImageColorAllocate ($this->image, 0xFF, 0x00, 0xFF);\r
- $this->colour['aqua'] = ImageColorAllocate ($this->image, 0x00, 0xFF, 0xFF);\r
- //$this->colour['white'] = ImageColorAllocate ($this->image, 0xFF, 0xFF, 0xFF);\r
- // shades of gray\r
- $this->colour['grayF0'] = ImageColorAllocate ($this->image, 0xF0, 0xF0, 0xF0);\r
- $this->colour['grayEE'] = ImageColorAllocate ($this->image, 0xEE, 0xEE, 0xEE);\r
- $this->colour['grayDD'] = ImageColorAllocate ($this->image, 0xDD, 0xDD, 0xDD);\r
- $this->colour['grayCC'] = ImageColorAllocate ($this->image, 0xCC, 0xCC, 0xCC);\r
- $this->colour['gray33'] = ImageColorAllocate ($this->image, 0x33, 0x33, 0x33);\r
- $this->colour['gray66'] = ImageColorAllocate ($this->image, 0x66, 0x66, 0x66);\r
- $this->colour['gray99'] = ImageColorAllocate ($this->image, 0x99, 0x99, 0x99);\r
-\r
- $this->colour['none'] = 'none';\r
- return true;\r
-}\r
-\r
-function output() {\r
- if ($this->debug) { // for debugging purposes.\r
- //expandPre($this->graph);\r
- //expandPre($this->y_data);\r
- //expandPre($this->x_data);\r
- //expandPre($this->parameter);\r
- } else {\r
-\r
- $expiresSeconds = $this->parameter['seconds_to_live'];\r
- $expiresHours = $this->parameter['hours_to_live'];\r
-\r
- if ($expiresHours || $expiresSeconds) {\r
- $now = mktime (date("H"),date("i"),date("s"),date("m"),date("d"),date("Y"));\r
- $expires = mktime (date("H")+$expiresHours,date("i"),date("s")+$expiresSeconds,date("m"),date("d"),date("Y"));\r
- $expiresGMT = gmdate('D, d M Y H:i:s', $expires).' GMT';\r
- $lastModifiedGMT = gmdate('D, d M Y H:i:s', $now).' GMT';\r
-\r
- Header('Last-modified: '.$lastModifiedGMT);\r
- Header('Expires: '.$expiresGMT);\r
- }\r
-\r
- if ($this->parameter['file_name'] == 'none') {\r
- switch ($this->parameter['output_format']) {\r
- case 'GIF':\r
- Header("Content-type: image/gif"); // GIF??. switch to PNG guys!!\r
- ImageGIF($this->image);\r
- break;\r
- case 'JPEG':\r
- Header("Content-type: image/jpeg"); // JPEG for line art??. included for completeness.\r
- ImageJPEG($this->image);\r
- break;\r
- default:\r
- Header("Content-type: image/png"); // preferred output format\r
- ImagePNG($this->image);\r
- break;\r
- }\r
- } else {\r
- switch ($this->parameter['output_format']) {\r
- case 'GIF':\r
- ImageGIF($this->image, $this->parameter['file_name'].'.gif');\r
- break;\r
- case 'JPEG':\r
- ImageJPEG($this->image, $this->parameter['file_name'].'.jpg');\r
- break;\r
- default:\r
- ImagePNG($this->image, $this->parameter['file_name'].'.png');\r
- break;\r
- }\r
- }\r
-\r
- ImageDestroy($this->image);\r
- }\r
-} // function output\r
-\r
-function init_variable(&$variable, $value, $default) {\r
- if (!empty($value)) $variable = $value;\r
- else if (isset($default)) $variable = $default;\r
- else unset($variable);\r
-}\r
-\r
-// plot a point. options include square, circle, diamond, triangle, and dot. offset is used for drawing shadows.\r
-// for diamonds and triangles the size should be an even number to get nice look. if odd the points are crooked.\r
-function plot($x, $y, $type, $size, $colour, $offset) {\r
- //print("drawing point of type: $type, at offset: $offset");\r
- $u = $x + $offset;\r
- $v = $this->calculated['inner_border']['bottom'] - $y + $offset;\r
- $half = $size / 2;\r
-\r
- switch ($type) {\r
- case 'square':\r
- ImageFilledRectangle($this->image, $u-$half, $v-$half, $u+$half, $v+$half, $this->colour[$colour]);\r
- break;\r
- case 'square-open':\r
- ImageRectangle($this->image, $u-$half, $v-$half, $u+$half, $v+$half, $this->colour[$colour]);\r
- break;\r
- case 'circle':\r
- ImageArc($this->image, $u, $v, $size, $size, 0, 360, $this->colour[$colour]);\r
- ImageFillToBorder($this->image, $u, $v, $this->colour[$colour], $this->colour[$colour]);\r
- break;\r
- case 'circle-open':\r
- ImageArc($this->image, $u, $v, $size, $size, 0, 360, $this->colour[$colour]);\r
- break;\r
- case 'diamond':\r
- ImageFilledPolygon($this->image, array($u, $v-$half, $u+$half, $v, $u, $v+$half, $u-$half, $v), 4, $this->colour[$colour]);\r
- break;\r
- case 'diamond-open':\r
- ImagePolygon($this->image, array($u, $v-$half, $u+$half, $v, $u, $v+$half, $u-$half, $v), 4, $this->colour[$colour]);\r
- break;\r
- case 'triangle':\r
- ImageFilledPolygon($this->image, array($u, $v-$half, $u+$half, $v+$half, $u-$half, $v+$half), 3, $this->colour[$colour]);\r
- break;\r
- case 'triangle-open':\r
- ImagePolygon($this->image, array($u, $v-$half, $u+$half, $v+$half, $u-$half, $v+$half), 3, $this->colour[$colour]);\r
- break;\r
- case 'dot':\r
- ImageSetPixel($this->image, $u, $v, $this->colour[$colour]);\r
- break;\r
- }\r
-}\r
-\r
-function bar($x, $y, $type, $size, $colour, $offset, $index, $yoffset) {\r
- $index_offset = $this->calculated['bar_offset_index'][$index];\r
- if ( $yoffset ) {\r
- $bar_offsetx = 0;\r
- } else {\r
- $bar_offsetx = $this->calculated['bar_offset_x'][$index_offset];\r
- }\r
- //$this->dbug("drawing bar at offset = $offset : index = $index: bar_offsetx = $bar_offsetx");\r
-\r
- $span = ($this->calculated['bar_width'] * $size) / 2;\r
- $x_left = $x + $bar_offsetx - $span;\r
- $x_right = $x + $bar_offsetx + $span;\r
-\r
- if ($this->parameter['zero_axis'] != 'none') {\r
- $zero = $this->calculated['zero_axis'];\r
- if ($this->parameter['shadow_below_axis'] ) $zero += $offset;\r
- $u_left = $x_left + $offset;\r
- $u_right = $x_right + $offset - 1;\r
- $v = $this->calculated['boundary_box']['bottom'] - $y + $offset;\r
-\r
- if ($v > $zero) {\r
- $top = $zero +1;\r
- $bottom = $v;\r
- } else {\r
- $top = $v;\r
- $bottom = $zero - 1;\r
- }\r
-\r
- switch ($type) {\r
- case 'open':\r
- //ImageRectangle($this->image, round($u_left), $top, round($u_right), $bottom, $this->colour[$colour]);\r
- if ($v > $zero)\r
- ImageRectangle($this->image, round($u_left), $bottom, round($u_right), $bottom, $this->colour[$colour]);\r
- else\r
- ImageRectangle($this->image, round($u_left), $top, round($u_right), $top, $this->colour[$colour]);\r
- ImageRectangle($this->image, round($u_left), $top, round($u_left), $bottom, $this->colour[$colour]);\r
- ImageRectangle($this->image, round($u_right), $top, round($u_right), $bottom, $this->colour[$colour]);\r
- break;\r
- case 'fill':\r
- ImageFilledRectangle($this->image, round($u_left), $top, round($u_right), $bottom, $this->colour[$colour]);\r
- break;\r
- }\r
-\r
- } else {\r
-\r
- $bottom = $this->calculated['boundary_box']['bottom'];\r
- if ($this->parameter['shadow_below_axis'] ) $bottom += $offset;\r
- if ($this->parameter['inner_border'] != 'none') $bottom -= 1; // 1 pixel above bottom if border is to be drawn.\r
- $u_left = $x_left + $offset;\r
- $u_right = $x_right + $offset - 1;\r
- $v = $this->calculated['boundary_box']['bottom'] - $y + $offset;\r
-\r
- // Moodle addition, plus the function parameter yoffset\r
- if ($yoffset) { // Moodle\r
- $yoffset = $yoffset - round(($bottom - $v) / 2.0); // Moodle\r
- $bottom -= $yoffset; // Moodle\r
- $v -= $yoffset; // Moodle\r
- } // Moodle\r
-\r
- switch ($type) {\r
- case 'open':\r
- ImageRectangle($this->image, round($u_left), $v, round($u_right), $bottom, $this->colour[$colour]);\r
- break;\r
- case 'fill':\r
- ImageFilledRectangle($this->image, round($u_left), $v, round($u_right), $bottom, $this->colour[$colour]);\r
- break;\r
- }\r
- }\r
-}\r
-\r
-function area($x_start, $y_start, $x_end, $y_end, $type, $colour, $offset) {\r
- //dbug("drawing area type: $type, at offset: $offset");\r
- if ($this->parameter['zero_axis'] != 'none') {\r
- $bottom = $this->calculated['boundary_box']['bottom'];\r
- $zero = $this->calculated['zero_axis'];\r
- if ($this->parameter['shadow_below_axis'] ) $zero += $offset;\r
- $u_start = $x_start + $offset;\r
- $u_end = $x_end + $offset;\r
- $v_start = $bottom - $y_start + $offset;\r
- $v_end = $bottom - $y_end + $offset;\r
- switch ($type) {\r
- case 'fill':\r
- // draw it this way 'cos the FilledPolygon routine seems a bit buggy.\r
- ImageFilledPolygon($this->image, array($u_start, $v_start, $u_end, $v_end, $u_end, $zero, $u_start, $zero), 4, $this->colour[$colour]);\r
- ImagePolygon($this->image, array($u_start, $v_start, $u_end, $v_end, $u_end, $zero, $u_start, $zero), 4, $this->colour[$colour]);\r
- break;\r
- case 'open':\r
- //ImagePolygon($this->image, array($u_start, $v_start, $u_end, $v_end, $u_end, $zero, $u_start, $zero), 4, $this->colour[$colour]);\r
- ImageLine($this->image, $u_start, $v_start, $u_end, $v_end, $this->colour[$colour]);\r
- ImageLine($this->image, $u_start, $v_start, $u_start, $zero, $this->colour[$colour]);\r
- ImageLine($this->image, $u_end, $v_end, $u_end, $zero, $this->colour[$colour]);\r
- break;\r
- }\r
- } else {\r
- $bottom = $this->calculated['boundary_box']['bottom'];\r
- $u_start = $x_start + $offset;\r
- $u_end = $x_end + $offset;\r
- $v_start = $bottom - $y_start + $offset;\r
- $v_end = $bottom - $y_end + $offset;\r
-\r
- if ($this->parameter['shadow_below_axis'] ) $bottom += $offset;\r
- if ($this->parameter['inner_border'] != 'none') $bottom -= 1; // 1 pixel above bottom if border is to be drawn.\r
- switch ($type) {\r
- case 'fill':\r
- ImageFilledPolygon($this->image, array($u_start, $v_start, $u_end, $v_end, $u_end, $bottom, $u_start, $bottom), 4, $this->colour[$colour]);\r
- break;\r
- case 'open':\r
- ImagePolygon($this->image, array($u_start, $v_start, $u_end, $v_end, $u_end, $bottom, $u_start, $bottom), 4, $this->colour[$colour]);\r
- break;\r
- }\r
- }\r
-}\r
-\r
-function line($x_start, $y_start, $x_end, $y_end, $type, $brush_type, $brush_size, $colour, $offset) {\r
- //dbug("drawing line of type: $type, at offset: $offset");\r
- $u_start = $x_start + $offset;\r
- $v_start = $this->calculated['boundary_box']['bottom'] - $y_start + $offset;\r
- $u_end = $x_end + $offset;\r
- $v_end = $this->calculated['boundary_box']['bottom'] - $y_end + $offset;\r
-\r
- switch ($type) {\r
- case 'brush':\r
- $this->draw_brush_line($u_start, $v_start, $u_end, $v_end, $brush_size, $brush_type, $colour);\r
- break;\r
- case 'line' :\r
- ImageLine($this->image, $u_start, $v_start, $u_end, $v_end, $this->colour[$colour]);\r
- break;\r
- case 'dash':\r
- ImageDashedLine($this->image, $u_start, $v_start, $u_end, $v_end, $this->colour[$colour]);\r
- break;\r
- }\r
-}\r
-\r
-// function to draw line. would prefer to use gdBrush but this is not supported yet.\r
-function draw_brush_line($x0, $y0, $x1, $y1, $size, $type, $colour) {\r
- //$this->dbug("line: $x0, $y0, $x1, $y1");\r
- $dy = $y1 - $y0;\r
- $dx = $x1 - $x0;\r
- $t = 0;\r
- $watchdog = 1024; // precaution to prevent infinite loops.\r
-\r
- $this->draw_brush($x0, $y0, $size, $type, $colour);\r
- if (abs($dx) > abs($dy)) { // slope < 1\r
- //$this->dbug("slope < 1");\r
- $m = $dy / $dx; // compute slope\r
- $t += $y0;\r
- $dx = ($dx < 0) ? -1 : 1;\r
- $m *= $dx;\r
- while (round($x0) != round($x1)) {\r
- if (!$watchdog--) break;\r
- $x0 += $dx; // step to next x value\r
- $t += $m; // add slope to y value\r
- $y = round($t);\r
- //$this->dbug("x0=$x0, x1=$x1, y=$y watchdog=$watchdog");\r
- $this->draw_brush($x0, $y, $size, $type, $colour);\r
-\r
- }\r
- } else { // slope >= 1\r
- //$this->dbug("slope >= 1");\r
- $m = $dx / $dy; // compute slope\r
- $t += $x0;\r
- $dy = ($dy < 0) ? -1 : 1;\r
- $m *= $dy;\r
- while (round($y0) != round($y1)) {\r
- if (!$watchdog--) break;\r
- $y0 += $dy; // step to next y value\r
- $t += $m; // add slope to x value\r
- $x = round($t);\r
- //$this->dbug("x=$x, y0=$y0, y1=$y1 watchdog=$watchdog");\r
- $this->draw_brush($x, $y0, $size, $type, $colour);\r
-\r
- }\r
- }\r
-}\r
-\r
-function draw_brush($x, $y, $size, $type, $colour) {\r
- $x = round($x);\r
- $y = round($y);\r
- $half = round($size / 2);\r
- switch ($type) {\r
- case 'circle':\r
- ImageArc($this->image, $x, $y, $size, $size, 0, 360, $this->colour[$colour]);\r
- ImageFillToBorder($this->image, $x, $y, $this->colour[$colour], $this->colour[$colour]);\r
- break;\r
- case 'square':\r
- ImageFilledRectangle($this->image, $x-$half, $y-$half, $x+$half, $y+$half, $this->colour[$colour]);\r
- break;\r
- case 'vertical':\r
- ImageFilledRectangle($this->image, $x, $y-$half, $x+1, $y+$half, $this->colour[$colour]);\r
- break;\r
- case 'horizontal':\r
- ImageFilledRectangle($this->image, $x-$half, $y, $x+$half, $y+1, $this->colour[$colour]);\r
- break;\r
- case 'slash':\r
- ImageFilledPolygon($this->image, array($x+$half, $y-$half,\r
- $x+$half+1, $y-$half,\r
- $x-$half+1, $y+$half,\r
- $x-$half, $y+$half\r
- ), 4, $this->colour[$colour]);\r
- break;\r
- case 'backslash':\r
- ImageFilledPolygon($this->image, array($x-$half, $y-$half,\r
- $x-$half+1, $y-$half,\r
- $x+$half+1, $y+$half,\r
- $x+$half, $y+$half\r
- ), 4, $this->colour[$colour]);\r
- break;\r
- default:\r
- @eval($type); // user can create own brush script.\r
- }\r
-}\r
-\r
-} // class graph\r
-\r
-\r
-?>\r
+<?php
+
+/*
+Graph Class. PHP Class to draw line, point, bar, and area graphs, including numeric x-axis and double y-axis.
+Version: 1.6.3
+Copyright (C) 2000 Herman Veluwenkamp
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+Copy of GNU Lesser General Public License at: http://www.gnu.org/copyleft/lesser.txt
+Contact author at: hermanV@mindless.com
+*/
+
+/* This file contains modifications by Martin Dougiamas
+ * as part of Moodle (http://moodle.com). Modified lines
+ * are marked with "Moodle".
+ */
+
+
+class graph {
+ var $image;
+ var $debug = FALSE; // be careful!!
+ var $calculated = array(); // array of computed values for chart
+ var $parameter = array( // input parameters
+ 'width' => 320, // default width of image
+ 'height' => 240, // default height of image
+ 'file_name' => 'none', // name of file for file to be saved as.
+ // NOTE: no suffix required. this is determined from output_format below.
+ 'output_format' => 'PNG', // image output format. 'GIF', 'PNG', 'JPEG'. default 'PNG'.
+
+ 'seconds_to_live' => 0, // expiry time in seconds (for HTTP header)
+ 'hours_to_live' => 0, // expiry time in hours (for HTTP header)
+ 'path_to_fonts' => 'fonts/', // path to fonts folder. don't forget *trailing* slash!!
+ // for WINDOZE this may need to be the full path, not relative.
+
+ 'title' => 'Graph Title', // text for graph title
+ 'title_font' => 'default.ttf', // title text font. don't forget to set 'path_to_fonts' above.
+ 'title_size' => 16, // title text point size
+ 'title_colour' => 'black', // colour for title text
+
+ 'x_label' => '', // if this is set then this text is printed on bottom axis of graph.
+ 'y_label_left' => '', // if this is set then this text is printed on left axis of graph.
+ 'y_label_right' => '', // if this is set then this text is printed on right axis of graph.
+
+ 'label_size' => 12, // label text point size
+ 'label_font' => 'default.ttf', // label text font. don't forget to set 'path_to_fonts' above.
+ 'label_colour' => 'gray33', // label text colour
+ 'y_label_angle' => 90, // rotation of y axis label
+
+ 'x_label_angle' => 90, // rotation of y axis label
+
+ 'outer_padding' => 8, // padding around outer text. i.e. title, y label, and x label.
+ 'inner_padding' => 6, // padding beteen axis text and graph.
+ 'outer_border' => 'none', // colour of border aound image, or 'none'.
+ 'inner_border' => 'black', // colour of border around actual graph, or 'none'.
+ 'inner_border_type' => 'box', // 'box' for all four sides, 'axis' for x/y axis only,
+ // 'y' or 'y-left' for y axis only, 'y-right' for right y axis only,
+ // 'x' for x axis only, 'u' for both left and right y axis and x axis.
+ 'outer_background' => 'none', // background colour of entire image.
+ 'inner_background' => 'none', // background colour of plot area.
+
+ 'y_min_left' => 0, // this will be reset to minimum value if there is a value lower than this.
+ 'y_max_left' => 0, // this will be reset to maximum value if there is a value higher than this.
+ 'y_min_right' => 0, // this will be reset to minimum value if there is a value lower than this.
+ 'y_max_right' => 0, // this will be reset to maximum value if there is a value higher than this.
+ 'x_min' => 0, // only used if x axis is numeric.
+ 'x_max' => 0, // only used if x axis is numeric.
+
+ 'y_resolution_left' => 1, // scaling for rounding of y axis max value.
+ // if max y value is 8645 then
+ // if y_resolution is 0, then y_max becomes 9000.
+ // if y_resolution is 1, then y_max becomes 8700.
+ // if y_resolution is 2, then y_max becomes 8650.
+ // if y_resolution is 3, then y_max becomes 8645.
+ // get it?
+ 'y_decimal_left' => 0, // number of decimal places for y_axis text.
+ 'y_resolution_right' => 2, // ... same for right hand side
+ 'y_decimal_right' => 0, // ... same for right hand side
+ 'x_resolution' => 2, // only used if x axis is numeric.
+ 'x_decimal' => 0, // only used if x axis is numeric.
+
+ 'point_size' => 4, // default point size. use even number for diamond or triangle to get nice look.
+ 'brush_size' => 4, // default brush size for brush line.
+ 'brush_type' => 'circle', // type of brush to use to draw line. choose from the following
+ // 'circle', 'square', 'horizontal', 'vertical', 'slash', 'backslash'
+ 'bar_size' => 0.8, // size of bar to draw. <1 bars won't touch
+ // 1 is full width - i.e. bars will touch.
+ // >1 means bars will overlap.
+ 'bar_spacing' => 10, // space in pixels between group of bars for each x value.
+ 'shadow_offset' => 3, // draw shadow at this offset, unless overidden by data parameter.
+ 'shadow' => 'grayCC', // 'none' or colour of shadow.
+ 'shadow_below_axis' => true, // whether to draw shadows of bars and areas below the x/zero axis.
+
+
+ 'x_axis_gridlines' => 'auto', // if set to a number then x axis is treated as numeric.
+ 'y_axis_gridlines' => 6, // number of gridlines on y axis.
+ 'zero_axis' => 'none', // colour to draw zero-axis, or 'none'.
+
+
+ 'axis_font' => 'default.ttf', // axis text font. don't forget to set 'path_to_fonts' above.
+ 'axis_size' => 12, // axis text font size in points
+ 'axis_colour' => 'gray33', // colour of axis text.
+ 'y_axis_angle' => 0, // rotation of axis text.
+ 'x_axis_angle' => 90, // rotation of axis text.
+
+ 'y_axis_text_left' => 1, // whether to print left hand y axis text. if 0 no text, if 1 all ticks have text,
+ 'x_axis_text' => 1, // if 4 then print every 4th tick and text, etc...
+ 'y_axis_text_right' => 0, // behaviour same as above for right hand y axis.
+
+ 'x_offset' => 0.5, // x axis tick offset from y axis as fraction of tick spacing.
+ 'y_ticks_colour' => 'black', // colour to draw y ticks, or 'none'
+ 'x_ticks_colour' => 'black', // colour to draw x ticks, or 'none'
+ 'y_grid' => 'line', // grid lines. set to 'line' or 'dash'...
+ 'x_grid' => 'line', // or if set to 'none' print nothing.
+ 'grid_colour' => 'grayEE', // default grid colour.
+ 'tick_length' => 4, // length of ticks in pixels. can be negative. i.e. outside data drawing area.
+
+ 'legend' => 'none', // default. no legend.
+ // otherwise: 'top-left', 'top-right', 'bottom-left', 'bottom-right',
+ // 'outside-top', 'outside-bottom', 'outside-left', or 'outside-right'.
+ 'legend_offset' => 10, // offset in pixels from graph or outside border.
+ 'legend_padding' => 5, // padding around legend text.
+ 'legend_font' => 'default.ttf', // legend text font. don't forget to set 'path_to_fonts' above.
+ 'legend_size' => 9, // legend text point size.
+ 'legend_colour' => 'black', // legend text colour.
+ 'legend_border' => 'none', // legend border colour, or 'none'.
+
+ 'decimal_point' => '.', // symbol for decimal separation '.' or ',' *european support.
+ 'thousand_sep' => ',', // symbol for thousand separation ',' or ''
+
+ );
+
+
+
+// init all text - title, labels, and axis text.
+function init() {
+
+
+ /// Moodle mods: overrides the font path
+ global $CFG;
+ $currlang = current_language();
+ $fontpath = $CFG->dirroot."/lang/$currlang/fonts/";
+ if (!file_exists("$fontpath"."default.ttf")) {
+ $fontpath = $CFG->dirroot."/lang/en/fonts/";
+ }
+ $this->parameter['path_to_fonts'] = $fontpath;
+
+ if (file_exists("$fontpath"."lang_decode.php")) {
+ $this->parameter['lang_decode'] = "$fontpath"."lang_decode.php";
+ } else {
+ $this->parameter['lang_decode'] = "";
+ }
+ /// End Moodle mods
+
+
+
+ $this->calculated['outer_border'] = $this->calculated['boundary_box'];
+
+ // outer padding
+ $this->calculated['boundary_box']['left'] += $this->parameter['outer_padding'];
+ $this->calculated['boundary_box']['top'] += $this->parameter['outer_padding'];
+ $this->calculated['boundary_box']['right'] -= $this->parameter['outer_padding'];
+ $this->calculated['boundary_box']['bottom'] -= $this->parameter['outer_padding'];
+
+ $this->init_x_axis();
+ $this->init_y_axis();
+ $this->init_legend();
+ $this->init_labels();
+
+ // take into account tick lengths
+ $this->calculated['bottom_inner_padding'] = $this->parameter['inner_padding'];
+ if (($this->parameter['x_ticks_colour'] != 'none') && ($this->parameter['tick_length'] < 0))
+ $this->calculated['bottom_inner_padding'] -= $this->parameter['tick_length'];
+ $this->calculated['boundary_box']['bottom'] -= $this->calculated['bottom_inner_padding'];
+
+ $this->calculated['left_inner_padding'] = $this->parameter['inner_padding'];
+ if ($this->parameter['y_axis_text_left']) {
+ if (($this->parameter['y_ticks_colour'] != 'none') && ($this->parameter['tick_length'] < 0))
+ $this->calculated['left_inner_padding'] -= $this->parameter['tick_length'];
+ }
+ $this->calculated['boundary_box']['left'] += $this->calculated['left_inner_padding'];
+
+ $this->calculated['right_inner_padding'] = $this->parameter['inner_padding'];
+ if ($this->parameter['y_axis_text_right']) {
+ if (($this->parameter['y_ticks_colour'] != 'none') && ($this->parameter['tick_length'] < 0))
+ $this->calculated['right_inner_padding'] -= $this->parameter['tick_length'];
+ }
+ $this->calculated['boundary_box']['right'] -= $this->calculated['right_inner_padding'];
+
+ // boundaryBox now has coords for plotting area.
+ $this->calculated['inner_border'] = $this->calculated['boundary_box'];
+
+ $this->init_data();
+ $this->init_x_ticks();
+ $this->init_y_ticks();
+}
+
+function draw_text() {
+ $colour = $this->parameter['outer_background'];
+ if ($colour != 'none') $this->draw_rectangle($this->calculated['outer_border'], $colour, 'fill'); // graph background
+
+ // draw border around image
+ $colour = $this->parameter['outer_border'];
+ if ($colour != 'none') $this->draw_rectangle($this->calculated['outer_border'], $colour, 'box'); // graph border
+
+ $this->draw_title();
+ $this->draw_x_label();
+ $this->draw_y_label_left();
+ $this->draw_y_label_right();
+ $this->draw_x_axis();
+ $this->draw_y_axis();
+ if ($this->calculated['y_axis_left']['has_data']) $this->draw_zero_axis_left(); // either draw zero axis on left
+ else if ($this->calculated['y_axis_right']['has_data']) $this->draw_zero_axis_right(); // ... or right.
+ $this->draw_legend();
+
+ // draw border around plot area
+ $colour = $this->parameter['inner_background'];
+ if ($colour != 'none') $this->draw_rectangle($this->calculated['inner_border'], $colour, 'fill'); // graph background
+
+ // draw border around image
+ $colour = $this->parameter['inner_border'];
+ if ($colour != 'none') $this->draw_rectangle($this->calculated['inner_border'], $colour, $this->parameter['inner_border_type']); // graph border
+}
+
+function draw_stack() {
+ $this->init();
+ $this->draw_text();
+
+ $yOrder = $this->y_order; // save y_order data.
+ // iterate over each data set. order is very important if you want to see data correctly. remember shadows!!
+ foreach ($yOrder as $set) {
+ $this->y_order = array($set);
+ $this->init_data();
+ $this->draw_data();
+ }
+ $this->y_order = $yOrder; // revert y_order data.
+
+ $this->output();
+}
+
+function draw() {
+ $this->init();
+ $this->draw_text();
+ $this->draw_data();
+ $this->output();
+}
+
+// draw a data set
+function draw_set($order, $set, $offset) {
+ if ($offset) @$this->init_variable($colour, $this->y_format[$set]['shadow'], $this->parameter['shadow']);
+ else $colour = $this->y_format[$set]['colour'];
+ @$this->init_variable($point, $this->y_format[$set]['point'], 'none');
+ @$this->init_variable($pointSize, $this->y_format[$set]['point_size'], $this->parameter['point_size']);
+ @$this->init_variable($line, $this->y_format[$set]['line'], 'none');
+ @$this->init_variable($brushType, $this->y_format[$set]['brush_type'], $this->parameter['brush_type']);
+ @$this->init_variable($brushSize, $this->y_format[$set]['brush_size'], $this->parameter['brush_size']);
+ @$this->init_variable($bar, $this->y_format[$set]['bar'], 'none');
+ @$this->init_variable($barSize, $this->y_format[$set]['bar_size'], $this->parameter['bar_size']);
+ @$this->init_variable($area, $this->y_format[$set]['area'], 'none');
+
+ $lastX = 0;
+ $lastY = 'none';
+ $fromX = 0;
+ $fromY = 'none';
+
+ //print "set $set<BR>";
+ //expand_pre($this->calculated['y_plot']);
+
+ foreach ($this->x_data as $index => $x) {
+ //print "index $index<BR>";
+ $thisY = $this->calculated['y_plot'][$set][$index];
+ $thisX = $this->calculated['x_plot'][$index];
+
+ //print "$thisX, $thisY <BR>";
+
+ if (($bar!='none') && (string)$thisY != 'none') {
+ if ($relatedset = $this->offset_relation[$set]) { // Moodle
+ $yoffset = $this->calculated['y_plot'][$relatedset][$index]; // Moodle
+ } else { // Moodle
+ $yoffset = 0; // Moodle
+ } // Moodle
+ //$this->bar($thisX, $thisY, $bar, $barSize, $colour, $offset, $set); // Moodle
+ $this->bar($thisX, $thisY, $bar, $barSize, $colour, $offset, $set, $yoffset); // Moodle
+ }
+
+ if (($area!='none') && (((string)$lastY != 'none') && ((string)$thisY != 'none')))
+ $this->area($lastX, $lastY, $thisX, $thisY, $area, $colour, $offset);
+
+ if (($point!='none') && (string)$thisY != 'none') $this->plot($thisX, $thisY, $point, $pointSize, $colour, $offset);
+
+ if (($line!='none') && ((string)$thisY != 'none')) {
+ if ((string)$fromY != 'none')
+ $this->line($fromX, $fromY, $thisX, $thisY, $line, $brushType, $brushSize, $colour, $offset);
+
+ $fromY = $thisY; // start next line from here
+ $fromX = $thisX; // ...
+ } else {
+ $fromY = 'none';
+ $fromX = 'none';
+ }
+
+ $lastX = $thisX;
+ $lastY = $thisY;
+ }
+}
+
+function draw_data() {
+ // cycle thru y data to be plotted
+ // first check for drop shadows...
+ foreach ($this->y_order as $order => $set) {
+ @$this->init_variable($offset, $this->y_format[$set]['shadow_offset'], $this->parameter['shadow_offset']);
+ @$this->init_variable($colour, $this->y_format[$set]['shadow'], $this->parameter['shadow']);
+ if ($colour != 'none') $this->draw_set($order, $set, $offset);
+
+ }
+
+ // then draw data
+ foreach ($this->y_order as $order => $set) {
+ $this->draw_set($order, $set, 0);
+ }
+}
+
+function draw_legend() {
+ $position = $this->parameter['legend'];
+ if ($position == 'none') return; // abort if no border
+
+ $borderColour = $this->parameter['legend_border'];
+ $offset = $this->parameter['legend_offset'];
+ $padding = $this->parameter['legend_padding'];
+ $height = $this->calculated['legend']['boundary_box_all']['height'];
+ $width = $this->calculated['legend']['boundary_box_all']['width'];
+ $graphTop = $this->calculated['boundary_box']['top'];
+ $graphBottom = $this->calculated['boundary_box']['bottom'];
+ $graphLeft = $this->calculated['boundary_box']['left'];
+ $graphRight = $this->calculated['boundary_box']['right'];
+ $outsideRight = $this->calculated['outer_border']['right'];
+ $outsideBottom = $this->calculated['outer_border']['bottom'];
+ switch ($position) {
+ case 'top-left':
+ $top = $graphTop + $offset;
+ $bottom = $graphTop + $height + $offset;
+ $left = $graphLeft + $offset;
+ $right = $graphLeft + $width + $offset;
+
+ break;
+ case 'top-right':
+ $top = $graphTop + $offset;
+ $bottom = $graphTop + $height + $offset;
+ $left = $graphRight - $width - $offset;
+ $right = $graphRight - $offset;
+
+ break;
+ case 'bottom-left':
+ $top = $graphBottom - $height - $offset;
+ $bottom = $graphBottom - $offset;
+ $left = $graphLeft + $offset;
+ $right = $graphLeft + $width + $offset;
+
+ break;
+ case 'bottom-right':
+ $top = $graphBottom - $height - $offset;
+ $bottom = $graphBottom - $offset;
+ $left = $graphRight - $width - $offset;
+ $right = $graphRight - $offset;
+ break;
+
+ case 'outside-top' :
+ $top = $graphTop;
+ $bottom = $graphTop + $height;
+ $left = $outsideRight - $width - $offset;
+ $right = $outsideRight - $offset;
+ break;
+
+ case 'outside-bottom' :
+ $top = $graphBottom - $height;
+ $bottom = $graphBottom;
+ $left = $outsideRight - $width - $offset;
+ $right = $outsideRight - $offset;
+ break;
+
+ case 'outside-left' :
+ $top = $outsideBottom - $height - $offset;
+ $bottom = $outsideBottom - $offset;
+ $left = $graphLeft;
+ $right = $graphLeft + $width;
+ break;
+
+ case 'outside-right' :
+ $top = $outsideBottom - $height - $offset;
+ $bottom = $outsideBottom - $offset;
+ $left = $graphRight - $width;
+ $right = $graphRight;
+ break;
+ default: // default is top left. no particular reason.
+ $top = $this->calculated['boundary_box']['top'];
+ $bottom = $this->calculated['boundary_box']['top'] + $this->calculated['legend']['boundary_box_all']['height'];
+ $left = $this->calculated['boundary_box']['left'];
+ $right = $this->calculated['boundary_box']['right'] + $this->calculated['legend']['boundary_box_all']['width'];
+
+}
+ // legend border
+ if($borderColour!='none') $this->draw_rectangle(array('top' => $top,
+ 'left' => $left,
+ 'bottom' => $bottom,
+ 'right' => $right), $this->parameter['legend_border'], 'box');
+
+ // legend text
+ $legendText = array('points' => $this->parameter['legend_size'],
+ 'angle' => 0,
+ 'font' => $this->parameter['legend_font'],
+ 'colour' => $this->parameter['legend_colour']);
+
+ $box = $this->calculated['legend']['boundary_box_max']['height']; // use max height for legend square size.
+ $x = $left + $padding;
+ $x_text = $x + $box * 2;
+ $y = $top + $padding;
+
+ foreach ($this->y_order as $set) {
+ $legendText['text'] = $this->calculated['legend']['text'][$set];
+ if ($legendText['text'] != 'none') {
+ // if text exists then draw box and text
+ $boxColour = $this->colour[$this->y_format[$set]['colour']];
+
+ // draw box
+ ImageFilledRectangle($this->image, $x, $y, $x + $box, $y + $box, $boxColour);
+
+ // draw text
+ $coords = array('x' => $x + $box * 2, 'y' => $y, 'reference' => 'top-left');
+ $legendText['boundary_box'] = $this->calculated['legend']['boundary_box'][$set];
+ $this->update_boundaryBox($legendText['boundary_box'], $coords);
+ $this->print_TTF($legendText);
+ $y += $padding + $box;
+ }
+ }
+
+}
+
+function draw_y_label_right() {
+ if (!$this->parameter['y_label_right']) return;
+ $x = $this->calculated['boundary_box']['right'] + $this->parameter['inner_padding'];
+ if ($this->parameter['y_axis_text_right']) $x += $this->calculated['y_axis_right']['boundary_box_max']['width']
+ + $this->calculated['right_inner_padding'];
+ $y = ($this->calculated['boundary_box']['bottom'] + $this->calculated['boundary_box']['top']) / 2;
+
+ $label = $this->calculated['y_label_right'];
+ $coords = array('x' => $x, 'y' => $y, 'reference' => 'left-center');
+ $this->update_boundaryBox($label['boundary_box'], $coords);
+ $this->print_TTF($label);
+}
+
+
+function draw_y_label_left() {
+ if (!$this->parameter['y_label_left']) return;
+ $x = $this->calculated['boundary_box']['left'] - $this->parameter['inner_padding'];
+ if ($this->parameter['y_axis_text_left']) $x -= $this->calculated['y_axis_left']['boundary_box_max']['width']
+ + $this->calculated['left_inner_padding'];
+ $y = ($this->calculated['boundary_box']['bottom'] + $this->calculated['boundary_box']['top']) / 2;
+
+ $label = $this->calculated['y_label_left'];
+ $coords = array('x' => $x, 'y' => $y, 'reference' => 'right-center');
+ $this->update_boundaryBox($label['boundary_box'], $coords);
+ $this->print_TTF($label);
+}
+
+function draw_title() {
+ if (!$this->parameter['title']) return;
+ //$y = $this->calculated['outside_border']['top'] + $this->parameter['outer_padding'];
+ $y = $this->calculated['boundary_box']['top'] - $this->parameter['outer_padding'];
+ $x = ($this->calculated['boundary_box']['right'] + $this->calculated['boundary_box']['left']) / 2;
+ $label = $this->calculated['title'];
+ $coords = array('x' => $x, 'y' => $y, 'reference' => 'bottom-center');
+ $this->update_boundaryBox($label['boundary_box'], $coords);
+ $this->print_TTF($label);
+}
+
+function draw_x_label() {
+ if (!$this->parameter['x_label']) return;
+ $y = $this->calculated['boundary_box']['bottom'] + $this->parameter['inner_padding'];
+ if ($this->parameter['x_axis_text']) $y += $this->calculated['x_axis']['boundary_box_max']['height']
+ + $this->calculated['bottom_inner_padding'];
+ $x = ($this->calculated['boundary_box']['right'] + $this->calculated['boundary_box']['left']) / 2;
+ $label = $this->calculated['x_label'];
+ $coords = array('x' => $x, 'y' => $y, 'reference' => 'top-center');
+ $this->update_boundaryBox($label['boundary_box'], $coords);
+ $this->print_TTF($label);
+}
+
+function draw_zero_axis_left() {
+ $colour = $this->parameter['zero_axis'];
+ if ($colour == 'none') return;
+ // draw zero axis on left hand side
+ $this->calculated['zero_axis'] = round($this->calculated['boundary_box']['top'] + ($this->calculated['y_axis_left']['max'] * $this->calculated['y_axis_left']['factor']));
+ ImageLine($this->image, $this->calculated['boundary_box']['left'], $this->calculated['zero_axis'], $this->calculated['boundary_box']['right'], $this->calculated['zero_axis'], $this->colour[$colour]);
+}
+
+function draw_zero_axis_right() {
+ $colour = $this->parameter['zero_axis'];
+ if ($colour == 'none') return;
+ // draw zero axis on right hand side
+ $this->calculated['zero_axis'] = round($this->calculated['boundary_box']['top'] + ($this->calculated['y_axis_right']['max'] * $this->calculated['y_axis_right']['factor']));
+ ImageLine($this->image, $this->calculated['boundary_box']['left'], $this->calculated['zero_axis'], $this->calculated['boundary_box']['right'], $this->calculated['zero_axis'], $this->colour[$colour]);
+}
+
+function draw_x_axis() {
+ $gridColour = $this->colour[$this->parameter['grid_colour']];
+ $tickColour = $this->colour[$this->parameter['x_ticks_colour']];
+ $axis_colour = $this->parameter['axis_colour'];
+ $xGrid = $this->parameter['x_grid'];
+ $gridTop = $this->calculated['boundary_box']['top'];
+ $gridBottom = $this->calculated['boundary_box']['bottom'];
+
+ if ($this->parameter['tick_length'] >= 0) {
+ $tickTop = $this->calculated['boundary_box']['bottom'] - $this->parameter['tick_length'];
+ $tickBottom = $this->calculated['boundary_box']['bottom'];
+ $textBottom = $tickBottom + $this->calculated['bottom_inner_padding'];
+ } else {
+ $tickTop = $this->calculated['boundary_box']['bottom'];
+ $tickBottom = $this->calculated['boundary_box']['bottom'] - $this->parameter['tick_length'];
+ $textBottom = $tickBottom + $this->calculated['bottom_inner_padding'];
+ }
+
+ $axis_font = $this->parameter['axis_font'];
+ $axis_size = $this->parameter['axis_size'];
+ $axis_angle = $this->parameter['x_axis_angle'];
+
+ if ($axis_angle == 0) $reference = 'top-center';
+ if ($axis_angle > 0) $reference = 'top-right';
+ if ($axis_angle < 0) $reference = 'top-left';
+ if ($axis_angle == 90) $reference = 'top-center';
+
+ //generic tag information. applies to all axis text.
+ $axisTag = array('points' => $axis_size, 'angle' => $axis_angle, 'font' => $axis_font, 'colour' => $axis_colour);
+
+ foreach ($this->calculated['x_axis']['tick_x'] as $set => $tickX) {
+ // draw x grid if colour specified
+ if ($xGrid != 'none') {
+ switch ($xGrid) {
+ case 'line':
+ ImageLine($this->image, round($tickX), round($gridTop), round($tickX), round($gridBottom), $gridColour);
+ break;
+ case 'dash':
+ ImageDashedLine($this->image, round($tickX), round($gridTop), round($tickX), round($gridBottom), $gridColour);
+ break;
+ }
+ }
+
+ if ($this->parameter['x_axis_text'] && !($set % $this->parameter['x_axis_text'])) { // test if tick should be displayed
+ // draw tick
+ if ($tickColour != 'none')
+ ImageLine($this->image, round($tickX), round($tickTop), round($tickX), round($tickBottom), $tickColour);
+
+ // draw axis text
+ $coords = array('x' => $tickX, 'y' => $textBottom, 'reference' => $reference);
+ $axisTag['text'] = $this->calculated['x_axis']['text'][$set];
+ $axisTag['boundary_box'] = $this->calculated['x_axis']['boundary_box'][$set];
+ $this->update_boundaryBox($axisTag['boundary_box'], $coords);
+ $this->print_TTF($axisTag);
+ }
+ }
+}
+
+function draw_y_axis() {
+ $gridColour = $this->colour[$this->parameter['grid_colour']];
+ $tickColour = $this->colour[$this->parameter['y_ticks_colour']];
+ $axis_colour = $this->parameter['axis_colour'];
+ $yGrid = $this->parameter['y_grid'];
+ $gridLeft = $this->calculated['boundary_box']['left'];
+ $gridRight = $this->calculated['boundary_box']['right'];
+
+ // axis font information
+ $axis_font = $this->parameter['axis_font'];
+ $axis_size = $this->parameter['axis_size'];
+ $axis_angle = $this->parameter['y_axis_angle'];
+ $axisTag = array('points' => $axis_size, 'angle' => $axis_angle, 'font' => $axis_font, 'colour' => $axis_colour);
+
+
+ if ($this->calculated['y_axis_left']['has_data']) {
+ // LEFT HAND SIDE
+ // left and right coords for ticks
+ if ($this->parameter['tick_length'] >= 0) {
+ $tickLeft = $this->calculated['boundary_box']['left'];
+ $tickRight = $this->calculated['boundary_box']['left'] + $this->parameter['tick_length'];
+ } else {
+ $tickLeft = $this->calculated['boundary_box']['left'] + $this->parameter['tick_length'];
+ $tickRight = $this->calculated['boundary_box']['left'];
+ }
+ $textRight = $tickLeft - $this->calculated['left_inner_padding'];
+
+ if ($axis_angle == 0) $reference = 'right-center';
+ if ($axis_angle > 0) $reference = 'right-top';
+ if ($axis_angle < 0) $reference = 'right-bottom';
+ if ($axis_angle == 90) $reference = 'right-center';
+
+ foreach ($this->calculated['y_axis']['tick_y'] as $set => $tickY) {
+ // draw y grid if colour specified
+ if ($yGrid != 'none') {
+ switch ($yGrid) {
+ case 'line':
+ ImageLine($this->image, round($gridLeft), round($tickY), round($gridRight), round($tickY), $gridColour);
+ break;
+ case 'dash':
+ ImageDashedLine($this->image, round($gridLeft), round($tickY), round($gridRight), round($tickY), $gridColour);
+ break;
+ }
+ }
+
+ // y axis text
+ if ($this->parameter['y_axis_text_left'] && !($set % $this->parameter['y_axis_text_left'])) { // test if tick should be displayed
+ // draw tick
+ if ($tickColour != 'none')
+ ImageLine($this->image, round($tickLeft), round($tickY), round($tickRight), round($tickY), $tickColour);
+
+ // draw axis text...
+ $coords = array('x' => $textRight, 'y' => $tickY, 'reference' => $reference);
+ $axisTag['text'] = $this->calculated['y_axis_left']['text'][$set];
+ $axisTag['boundary_box'] = $this->calculated['y_axis_left']['boundary_box'][$set];
+ $this->update_boundaryBox($axisTag['boundary_box'], $coords);
+ $this->print_TTF($axisTag);
+ }
+ }
+ }
+
+ if ($this->calculated['y_axis_right']['has_data']) {
+ // RIGHT HAND SIDE
+ // left and right coords for ticks
+ if ($this->parameter['tick_length'] >= 0) {
+ $tickLeft = $this->calculated['boundary_box']['right'] - $this->parameter['tick_length'];
+ $tickRight = $this->calculated['boundary_box']['right'];
+ } else {
+ $tickLeft = $this->calculated['boundary_box']['right'];
+ $tickRight = $this->calculated['boundary_box']['right'] - $this->parameter['tick_length'];
+ }
+ $textLeft = $tickRight+ $this->calculated['left_inner_padding'];
+
+ if ($axis_angle == 0) $reference = 'left-center';
+ if ($axis_angle > 0) $reference = 'left-bottom';
+ if ($axis_angle < 0) $reference = 'left-top';
+ if ($axis_angle == 90) $reference = 'left-center';
+
+ foreach ($this->calculated['y_axis']['tick_y'] as $set => $tickY) {
+ if (!$this->calculated['y_axis_left']['has_data'] && $yGrid != 'none') { // draw grid if not drawn already (above)
+ switch ($yGrid) {
+ case 'line':
+ ImageLine($this->image, round($gridLeft), round($tickY), round($gridRight), round($tickY), $gridColour);
+ break;
+ case 'dash':
+ ImageDashedLine($this->image, round($gridLeft), round($tickY), round($gridRight), round($tickY), $gridColour);
+ break;
+ }
+ }
+
+ if ($this->parameter['y_axis_text_right'] && !($set % $this->parameter['y_axis_text_right'])) { // test if tick should be displayed
+ // draw tick
+ if ($tickColour != 'none')
+ ImageLine($this->image, round($tickLeft), round($tickY), round($tickRight), round($tickY), $tickColour);
+
+ // draw axis text...
+ $coords = array('x' => $textLeft, 'y' => $tickY, 'reference' => $reference);
+ $axisTag['text'] = $this->calculated['y_axis_right']['text'][$set];
+ $axisTag['boundary_box'] = $this->calculated['y_axis_left']['boundary_box'][$set];
+ $this->update_boundaryBox($axisTag['boundary_box'], $coords);
+ $this->print_TTF($axisTag);
+ }
+ }
+ }
+}
+
+function init_data() {
+ $this->calculated['y_plot'] = array(); // array to hold pixel plotting coords for y axis
+ $height = $this->calculated['boundary_box']['bottom'] - $this->calculated['boundary_box']['top'];
+ $width = $this->calculated['boundary_box']['right'] - $this->calculated['boundary_box']['left'];
+
+ // calculate pixel steps between axis ticks.
+ $this->calculated['y_axis']['step'] = $height / ($this->parameter['y_axis_gridlines'] - 1);
+
+ // calculate x ticks spacing taking into account x offset for ticks.
+ $extraTick = 2 * $this->parameter['x_offset']; // extra tick to account for padding
+ $numTicks = $this->calculated['x_axis']['num_ticks'] - 1; // number of x ticks
+
+ $this->calculated['x_axis']['step'] = $width / ($numTicks + $extraTick);
+ $widthPlot = $width - ($this->calculated['x_axis']['step'] * $extraTick);
+ $this->calculated['x_axis']['step'] = $widthPlot / $numTicks;
+
+ //calculate factor for transforming x,y physical coords to logical coords for right hand y_axis.
+ $y_range = $this->calculated['y_axis_right']['max'] - $this->calculated['y_axis_right']['min'];
+ $y_range = ($y_range ? $y_range : 1);
+ $this->calculated['y_axis_right']['factor'] = $height / $y_range;
+
+ //calculate factor for transforming x,y physical coords to logical coords for left hand axis.
+ $yRange = $this->calculated['y_axis_left']['max'] - $this->calculated['y_axis_left']['min'];
+ $yRange = ($yRange ? $yRange : 1);
+ $this->calculated['y_axis_left']['factor'] = $height / $yRange;
+ if ($this->parameter['x_axis_gridlines'] != 'auto') {
+ $xRange = $this->calculated['x_axis']['max'] - $this->calculated['x_axis']['min'];
+ $xRange = ($xRange ? $xRange : 1);
+ $this->calculated['x_axis']['factor'] = $widthPlot / $xRange;
+ }
+
+ //expand_pre($this->calculated['boundary_box']);
+ // cycle thru all data sets...
+ $this->calculated['num_bars'] = 0;
+ foreach ($this->y_order as $order => $set) {
+ // determine how many bars there are
+ if (isset($this->y_format[$set]['bar']) && ($this->y_format[$set]['bar'] != 'none')) {
+ $this->calculated['bar_offset_index'][$set] = $this->calculated['num_bars']; // index to relate bar with data set.
+ $this->calculated['num_bars']++;
+ }
+
+ // calculate y coords for plotting data
+ foreach ($this->x_data as $index => $x) {
+ $this->calculated['y_plot'][$set][$index] = $this->y_data[$set][$index];
+
+ if ((string)$this->y_data[$set][$index] != 'none') {
+
+ if (isset($this->y_format[$set]['y_axis']) && $this->y_format[$set]['y_axis'] == 'right') {
+ $this->calculated['y_plot'][$set][$index] =
+ round(($this->y_data[$set][$index] - $this->calculated['y_axis_right']['min'])
+ * $this->calculated['y_axis_right']['factor']);
+ } else {
+ //print "$set $index<BR>";
+ $this->calculated['y_plot'][$set][$index] =
+ round(($this->y_data[$set][$index] - $this->calculated['y_axis_left']['min'])
+ * $this->calculated['y_axis_left']['factor']);
+ }
+
+ }
+ }
+ }
+ //print "factor ".$this->calculated['x_axis']['factor']."<BR>";
+ //expand_pre($this->calculated['x_plot']);
+
+ // calculate bar parameters if bars are to be drawn.
+ if ($this->calculated['num_bars']) {
+ $xStep = $this->calculated['x_axis']['step'];
+ $totalWidth = $this->calculated['x_axis']['step'] - $this->parameter['bar_spacing'];
+ $barWidth = $totalWidth / $this->calculated['num_bars'];
+
+ $barX = ($barWidth - $totalWidth) / 2; // starting x offset
+ for ($i=0; $i < $this->calculated['num_bars']; $i++) {
+ $this->calculated['bar_offset_x'][$i] = $barX;
+ $barX += $barWidth; // add width of bar to x offset.
+ }
+ $this->calculated['bar_width'] = $barWidth;
+ }
+
+
+}
+
+function init_x_ticks() {
+ // get coords for x axis ticks and data plots
+ //$xGrid = $this->parameter['x_grid'];
+ $xStep = $this->calculated['x_axis']['step'];
+ $ticksOffset = $this->parameter['x_offset']; // where to start drawing ticks relative to y axis.
+ $gridLeft = $this->calculated['boundary_box']['left'] + ($xStep * $ticksOffset); // grid x start
+ $tickX = $gridLeft; // tick x coord
+
+ foreach ($this->calculated['x_axis']['text'] as $set => $value) {
+ //print "index: $set<BR>";
+ // x tick value
+ $this->calculated['x_axis']['tick_x'][$set] = $tickX;
+ // if num ticks is auto then x plot value is same as x tick
+ if ($this->parameter['x_axis_gridlines'] == 'auto') $this->calculated['x_plot'][$set] = round($tickX);
+ //print $this->calculated['x_plot'][$set].'<BR>';
+ $tickX += $xStep;
+ }
+
+ //print "xStep: $xStep <BR>";
+ // if numeric x axis then calculate x coords for each data point. this is seperate from x ticks.
+ $gridX = $gridLeft;
+ if (empty($this->calculated['x_axis']['factor'])) {
+ $this->calculated['x_axis']['factor'] = 0;
+ }
+ if (empty($this->calculated['x_axis']['min'])) {
+ $this->calculated['x_axis']['min'] = 0;
+ }
+ $factor = $this->calculated['x_axis']['factor'];
+ $min = $this->calculated['x_axis']['min'];
+
+ if ($this->parameter['x_axis_gridlines'] != 'auto') {
+ foreach ($this->x_data as $index => $x) {
+ //print "index: $index, x: $x<BR>";
+ $offset = $x - $this->calculated['x_axis']['min'];
+
+ //$gridX = ($offset * $this->calculated['x_axis']['factor']);
+ //print "offset: $offset <BR>";
+ //$this->calculated['x_plot'][$set] = $gridLeft + ($offset * $this->calculated['x_axis']['factor']);
+
+ $this->calculated['x_plot'][$index] = $gridLeft + ($x - $min) * $factor;
+
+ //print $this->calculated['x_plot'][$set].'<BR>';
+ }
+ }
+ //expand_pre($this->calculated['boundary_box']);
+ //print "factor ".$this->calculated['x_axis']['factor']."<BR>";
+ //expand_pre($this->calculated['x_plot']);
+}
+
+function init_y_ticks() {
+ // get coords for y axis ticks
+
+ $yStep = $this->calculated['y_axis']['step'];
+ $gridBottom = $this->calculated['boundary_box']['bottom'];
+ $tickY = $gridBottom; // tick y coord
+
+ for ($i = 0; $i < $this->parameter['y_axis_gridlines']; $i++) {
+ $this->calculated['y_axis']['tick_y'][$i] = $tickY;
+ $tickY -= $yStep;
+ }
+
+}
+
+function init_labels() {
+ if ($this->parameter['title']) {
+ $size = $this->get_boundaryBox(
+ array('points' => $this->parameter['title_size'],
+ 'angle' => 0,
+ 'font' => $this->parameter['title_font'],
+ 'text' => $this->parameter['title']));
+ $this->calculated['title']['boundary_box'] = $size;
+ $this->calculated['title']['text'] = $this->parameter['title'];
+ $this->calculated['title']['font'] = $this->parameter['title_font'];
+ $this->calculated['title']['points'] = $this->parameter['title_size'];
+ $this->calculated['title']['colour'] = $this->parameter['title_colour'];
+ $this->calculated['title']['angle'] = 0;
+
+ $this->calculated['boundary_box']['top'] += $size['height'] + $this->parameter['outer_padding'];
+ //$this->calculated['boundary_box']['top'] += $size['height'];
+
+ } else $this->calculated['title']['boundary_box'] = $this->get_null_size();
+
+ if ($this->parameter['y_label_left']) {
+ $this->calculated['y_label_left']['text'] = $this->parameter['y_label_left'];
+ $this->calculated['y_label_left']['angle'] = $this->parameter['y_label_angle'];
+ $this->calculated['y_label_left']['font'] = $this->parameter['label_font'];
+ $this->calculated['y_label_left']['points'] = $this->parameter['label_size'];
+ $this->calculated['y_label_left']['colour'] = $this->parameter['label_colour'];
+
+ $size = $this->get_boundaryBox($this->calculated['y_label_left']);
+ $this->calculated['y_label_left']['boundary_box'] = $size;
+ //$this->calculated['boundary_box']['left'] += $size['width'] + $this->parameter['inner_padding'];
+ $this->calculated['boundary_box']['left'] += $size['width'];
+
+ } else $this->calculated['y_label_left']['boundary_box'] = $this->get_null_size();
+
+ if ($this->parameter['y_label_right']) {
+ $this->calculated['y_label_right']['text'] = $this->parameter['y_label_right'];
+ $this->calculated['y_label_right']['angle'] = $this->parameter['y_label_angle'];
+ $this->calculated['y_label_right']['font'] = $this->parameter['label_font'];
+ $this->calculated['y_label_right']['points'] = $this->parameter['label_size'];
+ $this->calculated['y_label_right']['colour'] = $this->parameter['label_colour'];
+
+ $size = $this->get_boundaryBox($this->calculated['y_label_right']);
+ $this->calculated['y_label_right']['boundary_box'] = $size;
+ //$this->calculated['boundary_box']['right'] -= $size['width'] + $this->parameter['inner_padding'];
+ $this->calculated['boundary_box']['right'] -= $size['width'];
+
+ } else $this->calculated['y_label_right']['boundary_box'] = $this->get_null_size();
+
+ if ($this->parameter['x_label']) {
+ $this->calculated['x_label']['text'] = $this->parameter['x_label'];
+ $this->calculated['x_label']['angle'] = $this->parameter['x_label_angle'];
+ $this->calculated['x_label']['font'] = $this->parameter['label_font'];
+ $this->calculated['x_label']['points'] = $this->parameter['label_size'];
+ $this->calculated['x_label']['colour'] = $this->parameter['label_colour'];
+
+ $size = $this->get_boundaryBox($this->calculated['x_label']);
+ $this->calculated['x_label']['boundary_box'] = $size;
+ //$this->calculated['boundary_box']['bottom'] -= $size['height'] + $this->parameter['inner_padding'];
+ $this->calculated['boundary_box']['bottom'] -= $size['height'];
+
+ } else $this->calculated['x_label']['boundary_box'] = $this->get_null_size();
+
+}
+
+
+function init_legend() {
+ $this->calculated['legend'] = array(); // array to hold calculated values for legend.
+ //$this->calculated['legend']['boundary_box_max'] = array('height' => 0, 'width' => 0);
+ $this->calculated['legend']['boundary_box_max'] = $this->get_null_size();
+ if ($this->parameter['legend'] == 'none') return;
+
+ $position = $this->parameter['legend'];
+ $numSets = 0; // number of data sets with legends.
+ $sumTextHeight = 0; // total of height of all legend text items.
+ $width = 0;
+ $height = 0;
+
+ foreach ($this->y_order as $set) {
+ $text = isset($this->y_format[$set]['legend']) ? $this->y_format[$set]['legend'] : 'none';
+ $size = $this->get_boundaryBox(
+ array('points' => $this->parameter['legend_size'],
+ 'angle' => 0,
+ 'font' => $this->parameter['legend_font'],
+ 'text' => $text));
+
+ $this->calculated['legend']['boundary_box'][$set] = $size;
+ $this->calculated['legend']['text'][$set] = $text;
+ //$this->calculated['legend']['font'][$set] = $this->parameter['legend_font'];
+ //$this->calculated['legend']['points'][$set] = $this->parameter['legend_size'];
+ //$this->calculated['legend']['angle'][$set] = 0;
+
+ if ($text && $text!='none') {
+ $numSets++;
+ $sumTextHeight += $size['height'];
+ }
+
+ if ($size['width'] > $this->calculated['legend']['boundary_box_max']['width'])
+ $this->calculated['legend']['boundary_box_max'] = $size;
+ }
+
+ $offset = $this->parameter['legend_offset']; // offset in pixels of legend box from graph border.
+ $padding = $this->parameter['legend_padding']; // padding in pixels around legend text.
+ $textWidth = $this->calculated['legend']['boundary_box_max']['width']; // width of largest legend item.
+ $textHeight = $this->calculated['legend']['boundary_box_max']['height']; // use height as size to use for colour square in legend.
+ $width = $padding * 2 + $textWidth + $textHeight * 2; // left and right padding + maximum text width + space for square
+ $height = $padding * ($numSets + 1) + $sumTextHeight; // top and bottom padding + padding between text + text.
+
+
+ $this->calculated['legend']['boundary_box_all'] = array('width' => $width,
+ 'height' => $height,
+ 'offset' => $offset,
+ 'reference' => $position);
+
+ switch ($position) { // move in right or bottom if legend is outside data plotting area.
+ case 'outside-top' :
+ $this->calculated['boundary_box']['right'] -= $offset + $width; // move in right hand side
+ break;
+
+ case 'outside-bottom' :
+ $this->calculated['boundary_box']['right'] -= $offset + $width; // move in right hand side
+ break;
+
+ case 'outside-left' :
+ $this->calculated['boundary_box']['bottom'] -= $offset + $height; // move in right hand side
+ break;
+
+ case 'outside-right' :
+ $this->calculated['boundary_box']['bottom'] -= $offset + $height; // move in right hand side
+ break;
+ }
+}
+
+function init_y_axis() {
+ $this->calculated['y_axis_left'] = array(); // array to hold calculated values for y_axis on left.
+ $this->calculated['y_axis_left']['boundary_box_max'] = $this->get_null_size();
+ $this->calculated['y_axis_right'] = array(); // array to hold calculated values for y_axis on right.
+ $this->calculated['y_axis_right']['boundary_box_max'] = $this->get_null_size();
+
+ $axis_font = $this->parameter['axis_font'];
+ $axis_size = $this->parameter['axis_size'];
+ $axis_colour = $this->parameter['axis_colour'];
+ $axis_angle = $this->parameter['y_axis_angle'];
+ $y_tick_labels = $this->y_tick_labels;
+
+ $this->calculated['y_axis_left']['has_data'] = FALSE;
+ $this->calculated['y_axis_right']['has_data'] = FALSE;
+
+ // find min and max y values.
+ $minLeft = $this->parameter['y_min_left'];
+ $maxLeft = $this->parameter['y_max_left'];
+ $minRight = $this->parameter['y_min_right'];
+ $maxRight = $this->parameter['y_max_right'];
+ $dataLeft = array();
+ $dataRight = array();
+ foreach ($this->y_order as $order => $set) {
+ if (isset($this->y_format[$set]['y_axis']) && $this->y_format[$set]['y_axis'] == 'right') {
+ $this->calculated['y_axis_right']['has_data'] = TRUE;
+ $dataRight = array_merge($dataRight, $this->y_data[$set]);
+ } else {
+ $this->calculated['y_axis_left']['has_data'] = TRUE;
+ $dataLeft = array_merge($dataLeft, $this->y_data[$set]);
+ }
+ }
+ $dataLeftRange = $this->find_range($dataLeft, $minLeft, $maxLeft, $this->parameter['y_resolution_left']);
+ $dataRightRange = $this->find_range($dataRight, $minRight, $maxRight, $this->parameter['y_resolution_right']);
+ $minLeft = $dataLeftRange['min'];
+ $maxLeft = $dataLeftRange['max'];
+ $minRight = $dataRightRange['min'];
+ $maxRight = $dataRightRange['max'];
+
+ $this->calculated['y_axis_left']['min'] = $minLeft;
+ $this->calculated['y_axis_left']['max'] = $maxLeft;
+ $this->calculated['y_axis_right']['min'] = $minRight;
+ $this->calculated['y_axis_right']['max'] = $maxRight;
+
+ $stepLeft = ($maxLeft - $minLeft) / ($this->parameter['y_axis_gridlines'] - 1);
+ $startLeft = $minLeft;
+ $step_right = ($maxRight - $minRight) / ($this->parameter['y_axis_gridlines'] - 1);
+ $start_right = $minRight;
+
+ if ($this->parameter['y_axis_text_left']) {
+ for ($i = 0; $i < $this->parameter['y_axis_gridlines']; $i++) { // calculate y axis text sizes
+ // left y axis
+ if ($y_tick_labels) {
+ $value = $y_tick_labels[$i];
+ } else {
+ $value = number_format($startLeft, $this->parameter['y_decimal_left'], $this->parameter['decimal_point'], $this->parameter['thousand_sep']);
+ }
+ $this->calculated['y_axis_left']['data'][$i] = $startLeft;
+ $this->calculated['y_axis_left']['text'][$i] = $value; // text is formatted raw data
+
+ $size = $this->get_boundaryBox(
+ array('points' => $axis_size,
+ 'font' => $axis_font,
+ 'angle' => $axis_angle,
+ 'colour' => $axis_colour,
+ 'text' => $value));
+ $this->calculated['y_axis_left']['boundary_box'][$i] = $size;
+
+ if ($size['height'] > $this->calculated['y_axis_left']['boundary_box_max']['height'])
+ $this->calculated['y_axis_left']['boundary_box_max']['height'] = $size['height'];
+ if ($size['width'] > $this->calculated['y_axis_left']['boundary_box_max']['width'])
+ $this->calculated['y_axis_left']['boundary_box_max']['width'] = $size['width'];
+
+ $startLeft += $stepLeft;
+ }
+ $this->calculated['boundary_box']['left'] += $this->calculated['y_axis_left']['boundary_box_max']['width']
+ + $this->parameter['inner_padding'];
+ }
+
+ if ($this->parameter['y_axis_text_right']) {
+ for ($i = 0; $i < $this->parameter['y_axis_gridlines']; $i++) { // calculate y axis text sizes
+ // right y axis
+ $value = number_format($start_right, $this->parameter['y_decimal_right'], $this->parameter['decimal_point'], $this->parameter['thousand_sep']);
+ $this->calculated['y_axis_right']['data'][$i] = $start_right;
+ $this->calculated['y_axis_right']['text'][$i] = $value; // text is formatted raw data
+ $size = $this->get_boundaryBox(
+ array('points' => $axis_size,
+ 'font' => $axis_font,
+ 'angle' => $axis_angle,
+ 'colour' => $axis_colour,
+ 'text' => $value));
+ $this->calculated['y_axis_right']['boundary_box'][$i] = $size;
+
+ if ($size['height'] > $this->calculated['y_axis_right']['boundary_box_max']['height'])
+ $this->calculated['y_axis_right']['boundary_box_max'] = $size;
+ if ($size['width'] > $this->calculated['y_axis_right']['boundary_box_max']['width'])
+ $this->calculated['y_axis_right']['boundary_box_max']['width'] = $size['width'];
+
+ $start_right += $step_right;
+ }
+ $this->calculated['boundary_box']['right'] -= $this->calculated['y_axis_right']['boundary_box_max']['width']
+ + $this->parameter['inner_padding'];
+ }
+}
+
+function init_x_axis() {
+ $this->calculated['x_axis'] = array(); // array to hold calculated values for x_axis.
+ $this->calculated['x_axis']['boundary_box_max'] = array('height' => 0, 'width' => 0);
+
+ $axis_font = $this->parameter['axis_font'];
+ $axis_size = $this->parameter['axis_size'];
+ $axis_colour = $this->parameter['axis_colour'];
+ $axis_angle = $this->parameter['x_axis_angle'];
+
+ // check whether to treat x axis as numeric
+ if ($this->parameter['x_axis_gridlines'] == 'auto') { // auto means text based x_axis, not numeric...
+ $this->calculated['x_axis']['num_ticks'] = sizeof($this->x_data);
+ $data = $this->x_data;
+ for ($i=0; $i < $this->calculated['x_axis']['num_ticks']; $i++) {
+ $value = array_shift($data); // grab value from begin of array
+ $this->calculated['x_axis']['data'][$i] = $value;
+ $this->calculated['x_axis']['text'][$i] = $value; // raw data and text are both the same in this case
+ $size = $this->get_boundaryBox(
+ array('points' => $axis_size,
+ 'font' => $axis_font,
+ 'angle' => $axis_angle,
+ 'colour' => $axis_colour,
+ 'text' => $value));
+ $this->calculated['x_axis']['boundary_box'][$i] = $size;
+ if ($size['height'] > $this->calculated['x_axis']['boundary_box_max']['height'])
+ $this->calculated['x_axis']['boundary_box_max'] = $size;
+ }
+
+ } else { // x axis is numeric so find max min values...
+ $this->calculated['x_axis']['num_ticks'] = $this->parameter['x_axis_gridlines'];
+
+ $min = $this->parameter['x_min'];
+ $max = $this->parameter['x_max'];
+ $data = array();
+ $data = $this->find_range($this->x_data, $min, $max, $this->parameter['x_resolution']);
+ $min = $data['min'];
+ $max = $data['max'];
+ $this->calculated['x_axis']['min'] = $min;
+ $this->calculated['x_axis']['max'] = $max;
+
+ $step = ($max - $min) / ($this->calculated['x_axis']['num_ticks'] - 1);
+ $start = $min;
+
+ for ($i = 0; $i < $this->calculated['x_axis']['num_ticks']; $i++) { // calculate x axis text sizes
+ $value = number_format($start, $this->parameter['xDecimal'], $this->parameter['decimal_point'], $this->parameter['thousand_sep']);
+ $this->calculated['x_axis']['data'][$i] = $start;
+ $this->calculated['x_axis']['text'][$i] = $value; // text is formatted raw data
+
+ $size = $this->get_boundaryBox(
+ array('points' => $axis_size,
+ 'font' => $axis_font,
+ 'angle' => $axis_angle,
+ 'colour' => $axis_colour,
+ 'text' => $value));
+ $this->calculated['x_axis']['boundary_box'][$i] = $size;
+
+ if ($size['height'] > $this->calculated['x_axis']['boundary_box_max']['height'])
+ $this->calculated['x_axis']['boundary_box_max'] = $size;
+
+ $start += $step;
+ }
+ }
+ if ($this->parameter['x_axis_text'])
+ $this->calculated['boundary_box']['bottom'] -= $this->calculated['x_axis']['boundary_box_max']['height']
+ + $this->parameter['inner_padding'];
+}
+
+// find max and min values for a data array given the resolution.
+function find_range($data, $min, $max, $resolution) {
+ if (sizeof($data) == 0 ) return array('min' => 0, 'max' => 0);
+ foreach ($data as $key => $value) {
+ if ($value=='none') continue;
+ if ($value > $max) $max = $value;
+ if ($value < $min) $min = $value;
+ }
+
+ if ($max == 0) {
+ $factor = 1;
+ } else {
+ if ($max < 0) $factor = - pow(10, (floor(log10(abs($max))) + $resolution) );
+ else $factor = pow(10, (floor(log10(abs($max))) - $resolution) );
+ }
+ $factor = round($factor * 1000.0) / 1000.0; // To avoid some wierd rounding errors (Moodle)
+
+ $max = $factor * @ceil($max / $factor);
+ $min = $factor * @floor($min / $factor);
+
+ //print "max=$max, min=$min<BR>";
+
+ return array('min' => $min, 'max' => $max);
+}
+
+function graph() {
+ if (func_num_args() == 2) {
+ $this->parameter['width'] = func_get_arg(0);
+ $this->parameter['height'] = func_get_arg(1);
+ }
+ //$this->boundaryBox = array(
+ $this->calculated['boundary_box'] = array(
+ 'left' => 0,
+ 'top' => 0,
+ 'right' => $this->parameter['width'] - 1,
+ 'bottom' => $this->parameter['height'] - 1);
+
+ $this->init_colours();
+
+ //ImageColorTransparent($this->image, $this->colour['white']); // colour for transparency
+}
+
+function print_TTF($message) {
+ $points = $message['points'];
+ $angle = $message['angle'];
+ $text = $message['text'];
+ $colour = $this->colour[$message['colour']];
+ $font = $this->parameter['path_to_fonts'].$message['font'];
+
+ $x = $message['boundary_box']['x'];
+ $y = $message['boundary_box']['y'];
+ $offsetX = $message['boundary_box']['offsetX'];
+ $offsetY = $message['boundary_box']['offsetY'];
+ $height = $message['boundary_box']['height'];
+ $width = $message['boundary_box']['width'];
+ $reference = $message['boundary_box']['reference'];
+
+ switch ($reference) {
+ case 'top-left':
+ case 'left-top':
+ $y += $height - $offsetY;
+ //$y += $offsetY;
+ $x += $offsetX;
+ break;
+ case 'left-center':
+ $y += ($height / 2) - $offsetY;
+ $x += $offsetX;
+ break;
+ case 'left-bottom':
+ $y -= $offsetY;
+ $x += $offsetX;
+ break;
+ case 'top-center':
+ $y += $height - $offsetY;
+ $x -= ($width / 2) - $offsetX;
+ break;
+ case 'top-right':
+ case 'right-top':
+ $y += $height - $offsetY;
+ $x -= $width - $offsetX;
+ break;
+ case 'right-center':
+ $y += ($height / 2) - $offsetY;
+ $x -= $width - $offsetX;
+ break;
+ case 'right-bottom':
+ $y -= $offsetY;
+ $x -= $width - $offsetX;
+ break;
+ case 'bottom-center':
+ $y -= $offsetY;
+ $x -= ($width / 2) - $offsetX;
+ break;
+ default:
+ $y = 0;
+ $x = 0;
+ break;
+ }
+ if ($this->parameter['lang_decode']) { // Moodle addition
+ include_once($this->parameter['lang_decode']);
+ $text = lang_decode($text);
+ }
+ ImageTTFText($this->image, $points, $angle, $x, $y, $colour, $font, $text);
+}
+
+// move boundaryBox to coordinates specified
+function update_boundaryBox(&$boundaryBox, $coords) {
+ $width = $boundaryBox['width'];
+ $height = $boundaryBox['height'];
+ $x = $coords['x'];
+ $y = $coords['y'];
+ $reference = $coords['reference'];
+ switch ($reference) {
+ case 'top-left':
+ case 'left-top':
+ $top = $y;
+ $bottom = $y + $height;
+ $left = $x;
+ $right = $x + $width;
+ break;
+ case 'left-center':
+ $top = $y - ($height / 2);
+ $bottom = $y + ($height / 2);
+ $left = $x;
+ $right = $x + $width;
+ break;
+ case 'left-bottom':
+ $top = $y - $height;
+ $bottom = $y;
+ $left = $x;
+ $right = $x + $width;
+ break;
+ case 'top-center':
+ $top = $y;
+ $bottom = $y + $height;
+ $left = $x - ($width / 2);
+ $right = $x + ($width / 2);
+ break;
+ case 'right-top':
+ case 'top-right':
+ $top = $y;
+ $bottom = $y + $height;
+ $left = $x - $width;
+ $right = $x;
+ break;
+ case 'right-center':
+ $top = $y - ($height / 2);
+ $bottom = $y + ($height / 2);
+ $left = $x - $width;
+ $right = $x;
+ break;
+ case 'bottom=right':
+ case 'right-bottom':
+ $top = $y - $height;
+ $bottom = $y;
+ $left = $x - $width;
+ $right = $x;
+ break;
+ default:
+ $top = 0;
+ $bottom = $height;
+ $left = 0;
+ $right = $width;
+ break;
+ }
+
+ $boundaryBox = array_merge($boundaryBox, array('top' => $top,
+ 'bottom' => $bottom,
+ 'left' => $left,
+ 'right' => $right,
+ 'x' => $x,
+ 'y' => $y,
+ 'reference' => $reference));
+}
+
+function get_null_size() {
+ return array('width' => 0,
+ 'height' => 0,
+ 'offsetX' => 0,
+ 'offsetY' => 0,
+ //'fontHeight' => 0
+ );
+}
+
+function get_boundaryBox($message) {
+ $points = $message['points'];
+ $angle = $message['angle'];
+ $font = $this->parameter['path_to_fonts'].$message['font'];
+ $text = $message['text'];
+
+ //print ('get_boundaryBox');
+ //expandPre($message);
+
+ // get font size
+ $bounds = ImageTTFBBox($points, $angle, $font, "W");
+ if ($angle < 0) {
+ $fontHeight = abs($bounds[7]-$bounds[1]);
+ } else if ($angle > 0) {
+ $fontHeight = abs($bounds[1]-$bounds[7]);
+ } else {
+ $fontHeight = abs($bounds[7]-$bounds[1]);
+ }
+
+ // get boundary box and offsets for printing at an angle
+ if ($this->parameter['lang_decode']) { // Moodle addition
+ include_once($this->parameter['lang_decode']);
+ $text = lang_decode($text);
+ }
+ $bounds = ImageTTFBBox($points, $angle, $font, $text);
+
+ if ($angle < 0) {
+ $width = abs($bounds[4]-$bounds[0]);
+ $height = abs($bounds[3]-$bounds[7]);
+ $offsetY = abs($bounds[3]-$bounds[1]);
+ $offsetX = 0;
+
+ } else if ($angle > 0) {
+ $width = abs($bounds[2]-$bounds[6]);
+ $height = abs($bounds[1]-$bounds[5]);
+ $offsetY = 0;
+ $offsetX = abs($bounds[0]-$bounds[6]);
+
+ } else {
+ $width = abs($bounds[4]-$bounds[6]);
+ $height = abs($bounds[7]-$bounds[1]);
+ $offsetY = 0;
+ $offsetX = 0;
+ }
+
+ //return values
+ return array('width' => $width,
+ 'height' => $height,
+ 'offsetX' => $offsetX,
+ 'offsetY' => $offsetY,
+ //'fontHeight' => $fontHeight
+ );
+}
+
+function draw_rectangle($border, $colour, $type) {
+ $colour = $this->colour[$colour];
+ switch ($type) {
+ case 'fill': // fill the rectangle
+ ImageFilledRectangle($this->image, $border['left'], $border['top'], $border['right'], $border['bottom'], $colour);
+ break;
+ case 'box': // all sides
+ ImageRectangle($this->image, $border['left'], $border['top'], $border['right'], $border['bottom'], $colour);
+ break;
+ case 'axis': // bottom x axis and left y axis
+ ImageLine($this->image, $border['left'], $border['top'], $border['left'], $border['bottom'], $colour);
+ ImageLine($this->image, $border['left'], $border['bottom'], $border['right'], $border['bottom'], $colour);
+ break;
+ case 'y': // left y axis only
+ case 'y-left':
+ ImageLine($this->image, $border['left'], $border['top'], $border['left'], $border['bottom'], $colour);
+ break;
+ case 'y-right': // right y axis only
+ ImageLine($this->image, $border['right'], $border['top'], $border['right'], $border['bottom'], $colour);
+ break;
+ case 'x': // bottom x axis only
+ ImageLine($this->image, $border['left'], $border['bottom'], $border['right'], $border['bottom'], $colour);
+ break;
+ case 'u': // u shaped. bottom x axis and both left and right y axis.
+ ImageLine($this->image, $border['left'], $border['top'], $border['left'], $border['bottom'], $colour);
+ ImageLine($this->image, $border['right'], $border['top'], $border['right'], $border['bottom'], $colour);
+ ImageLine($this->image, $border['left'], $border['bottom'], $border['right'], $border['bottom'], $colour);
+ break;
+
+ }
+}
+
+function init_colours() {
+ $this->image = ImageCreate($this->parameter['width'], $this->parameter['height']);
+ // standard colours
+ $this->colour['white'] = ImageColorAllocate ($this->image, 0xFF, 0xFF, 0xFF); // first colour is background colour.
+ $this->colour['black'] = ImageColorAllocate ($this->image, 0x00, 0x00, 0x00);
+ $this->colour['maroon'] = ImageColorAllocate ($this->image, 0x80, 0x00, 0x00);
+ $this->colour['green'] = ImageColorAllocate ($this->image, 0x00, 0x80, 0x00);
+ $this->colour['ltgreen'] = ImageColorAllocate ($this->image, 0x52, 0xF1, 0x7F);
+ $this->colour['ltltgreen']= ImageColorAllocate ($this->image, 0x99, 0xFF, 0x99);
+ $this->colour['olive'] = ImageColorAllocate ($this->image, 0x80, 0x80, 0x00);
+ $this->colour['navy'] = ImageColorAllocate ($this->image, 0x00, 0x00, 0x80);
+ $this->colour['purple'] = ImageColorAllocate ($this->image, 0x80, 0x00, 0x80);
+ $this->colour['gray'] = ImageColorAllocate ($this->image, 0x80, 0x80, 0x80);
+ $this->colour['red'] = ImageColorAllocate ($this->image, 0xFF, 0x00, 0x00);
+ $this->colour['ltred'] = ImageColorAllocate ($this->image, 0xFF, 0x99, 0x99);
+ $this->colour['ltltred'] = ImageColorAllocate ($this->image, 0xFF, 0xCC, 0xCC);
+ $this->colour['orange'] = ImageColorAllocate ($this->image, 0xFF, 0x66, 0x00);
+ $this->colour['ltorange'] = ImageColorAllocate ($this->image, 0xFF, 0x99, 0x66);
+ $this->colour['ltltorange'] = ImageColorAllocate ($this->image, 0xFF, 0xcc, 0x99);
+ $this->colour['lime'] = ImageColorAllocate ($this->image, 0x00, 0xFF, 0x00);
+ $this->colour['yellow'] = ImageColorAllocate ($this->image, 0xFF, 0xFF, 0x00);
+ $this->colour['blue'] = ImageColorAllocate ($this->image, 0x00, 0x00, 0xFF);
+ $this->colour['ltblue'] = ImageColorAllocate ($this->image, 0x00, 0xCC, 0xFF);
+ $this->colour['ltltblue'] = ImageColorAllocate ($this->image, 0x99, 0xFF, 0xFF);
+ $this->colour['fuchsia'] = ImageColorAllocate ($this->image, 0xFF, 0x00, 0xFF);
+ $this->colour['aqua'] = ImageColorAllocate ($this->image, 0x00, 0xFF, 0xFF);
+ //$this->colour['white'] = ImageColorAllocate ($this->image, 0xFF, 0xFF, 0xFF);
+ // shades of gray
+ $this->colour['grayF0'] = ImageColorAllocate ($this->image, 0xF0, 0xF0, 0xF0);
+ $this->colour['grayEE'] = ImageColorAllocate ($this->image, 0xEE, 0xEE, 0xEE);
+ $this->colour['grayDD'] = ImageColorAllocate ($this->image, 0xDD, 0xDD, 0xDD);
+ $this->colour['grayCC'] = ImageColorAllocate ($this->image, 0xCC, 0xCC, 0xCC);
+ $this->colour['gray33'] = ImageColorAllocate ($this->image, 0x33, 0x33, 0x33);
+ $this->colour['gray66'] = ImageColorAllocate ($this->image, 0x66, 0x66, 0x66);
+ $this->colour['gray99'] = ImageColorAllocate ($this->image, 0x99, 0x99, 0x99);
+
+ $this->colour['none'] = 'none';
+ return true;
+}
+
+function output() {
+ if ($this->debug) { // for debugging purposes.
+ //expandPre($this->graph);
+ //expandPre($this->y_data);
+ //expandPre($this->x_data);
+ //expandPre($this->parameter);
+ } else {
+
+ $expiresSeconds = $this->parameter['seconds_to_live'];
+ $expiresHours = $this->parameter['hours_to_live'];
+
+ if ($expiresHours || $expiresSeconds) {
+ $now = mktime (date("H"),date("i"),date("s"),date("m"),date("d"),date("Y"));
+ $expires = mktime (date("H")+$expiresHours,date("i"),date("s")+$expiresSeconds,date("m"),date("d"),date("Y"));
+ $expiresGMT = gmdate('D, d M Y H:i:s', $expires).' GMT';
+ $lastModifiedGMT = gmdate('D, d M Y H:i:s', $now).' GMT';
+
+ Header('Last-modified: '.$lastModifiedGMT);
+ Header('Expires: '.$expiresGMT);
+ }
+
+ if ($this->parameter['file_name'] == 'none') {
+ switch ($this->parameter['output_format']) {
+ case 'GIF':
+ Header("Content-type: image/gif"); // GIF??. switch to PNG guys!!
+ ImageGIF($this->image);
+ break;
+ case 'JPEG':
+ Header("Content-type: image/jpeg"); // JPEG for line art??. included for completeness.
+ ImageJPEG($this->image);
+ break;
+ default:
+ Header("Content-type: image/png"); // preferred output format
+ ImagePNG($this->image);
+ break;
+ }
+ } else {
+ switch ($this->parameter['output_format']) {
+ case 'GIF':
+ ImageGIF($this->image, $this->parameter['file_name'].'.gif');
+ break;
+ case 'JPEG':
+ ImageJPEG($this->image, $this->parameter['file_name'].'.jpg');
+ break;
+ default:
+ ImagePNG($this->image, $this->parameter['file_name'].'.png');
+ break;
+ }
+ }
+
+ ImageDestroy($this->image);
+ }
+} // function output
+
+function init_variable(&$variable, $value, $default) {
+ if (!empty($value)) $variable = $value;
+ else if (isset($default)) $variable = $default;
+ else unset($variable);
+}
+
+// plot a point. options include square, circle, diamond, triangle, and dot. offset is used for drawing shadows.
+// for diamonds and triangles the size should be an even number to get nice look. if odd the points are crooked.
+function plot($x, $y, $type, $size, $colour, $offset) {
+ //print("drawing point of type: $type, at offset: $offset");
+ $u = $x + $offset;
+ $v = $this->calculated['inner_border']['bottom'] - $y + $offset;
+ $half = $size / 2;
+
+ switch ($type) {
+ case 'square':
+ ImageFilledRectangle($this->image, $u-$half, $v-$half, $u+$half, $v+$half, $this->colour[$colour]);
+ break;
+ case 'square-open':
+ ImageRectangle($this->image, $u-$half, $v-$half, $u+$half, $v+$half, $this->colour[$colour]);
+ break;
+ case 'circle':
+ ImageArc($this->image, $u, $v, $size, $size, 0, 360, $this->colour[$colour]);
+ ImageFillToBorder($this->image, $u, $v, $this->colour[$colour], $this->colour[$colour]);
+ break;
+ case 'circle-open':
+ ImageArc($this->image, $u, $v, $size, $size, 0, 360, $this->colour[$colour]);
+ break;
+ case 'diamond':
+ ImageFilledPolygon($this->image, array($u, $v-$half, $u+$half, $v, $u, $v+$half, $u-$half, $v), 4, $this->colour[$colour]);
+ break;
+ case 'diamond-open':
+ ImagePolygon($this->image, array($u, $v-$half, $u+$half, $v, $u, $v+$half, $u-$half, $v), 4, $this->colour[$colour]);
+ break;
+ case 'triangle':
+ ImageFilledPolygon($this->image, array($u, $v-$half, $u+$half, $v+$half, $u-$half, $v+$half), 3, $this->colour[$colour]);
+ break;
+ case 'triangle-open':
+ ImagePolygon($this->image, array($u, $v-$half, $u+$half, $v+$half, $u-$half, $v+$half), 3, $this->colour[$colour]);
+ break;
+ case 'dot':
+ ImageSetPixel($this->image, $u, $v, $this->colour[$colour]);
+ break;
+ }
+}
+
+function bar($x, $y, $type, $size, $colour, $offset, $index, $yoffset) {
+ $index_offset = $this->calculated['bar_offset_index'][$index];
+ if ( $yoffset ) {
+ $bar_offsetx = 0;
+ } else {
+ $bar_offsetx = $this->calculated['bar_offset_x'][$index_offset];
+ }
+ //$this->dbug("drawing bar at offset = $offset : index = $index: bar_offsetx = $bar_offsetx");
+
+ $span = ($this->calculated['bar_width'] * $size) / 2;
+ $x_left = $x + $bar_offsetx - $span;
+ $x_right = $x + $bar_offsetx + $span;
+
+ if ($this->parameter['zero_axis'] != 'none') {
+ $zero = $this->calculated['zero_axis'];
+ if ($this->parameter['shadow_below_axis'] ) $zero += $offset;
+ $u_left = $x_left + $offset;
+ $u_right = $x_right + $offset - 1;
+ $v = $this->calculated['boundary_box']['bottom'] - $y + $offset;
+
+ if ($v > $zero) {
+ $top = $zero +1;
+ $bottom = $v;
+ } else {
+ $top = $v;
+ $bottom = $zero - 1;
+ }
+
+ switch ($type) {
+ case 'open':
+ //ImageRectangle($this->image, round($u_left), $top, round($u_right), $bottom, $this->colour[$colour]);
+ if ($v > $zero)
+ ImageRectangle($this->image, round($u_left), $bottom, round($u_right), $bottom, $this->colour[$colour]);
+ else
+ ImageRectangle($this->image, round($u_left), $top, round($u_right), $top, $this->colour[$colour]);
+ ImageRectangle($this->image, round($u_left), $top, round($u_left), $bottom, $this->colour[$colour]);
+ ImageRectangle($this->image, round($u_right), $top, round($u_right), $bottom, $this->colour[$colour]);
+ break;
+ case 'fill':
+ ImageFilledRectangle($this->image, round($u_left), $top, round($u_right), $bottom, $this->colour[$colour]);
+ break;
+ }
+
+ } else {
+
+ $bottom = $this->calculated['boundary_box']['bottom'];
+ if ($this->parameter['shadow_below_axis'] ) $bottom += $offset;
+ if ($this->parameter['inner_border'] != 'none') $bottom -= 1; // 1 pixel above bottom if border is to be drawn.
+ $u_left = $x_left + $offset;
+ $u_right = $x_right + $offset - 1;
+ $v = $this->calculated['boundary_box']['bottom'] - $y + $offset;
+
+ // Moodle addition, plus the function parameter yoffset
+ if ($yoffset) { // Moodle
+ $yoffset = $yoffset - round(($bottom - $v) / 2.0); // Moodle
+ $bottom -= $yoffset; // Moodle
+ $v -= $yoffset; // Moodle
+ } // Moodle
+
+ switch ($type) {
+ case 'open':
+ ImageRectangle($this->image, round($u_left), $v, round($u_right), $bottom, $this->colour[$colour]);
+ break;
+ case 'fill':
+ ImageFilledRectangle($this->image, round($u_left), $v, round($u_right), $bottom, $this->colour[$colour]);
+ break;
+ }
+ }
+}
+
+function area($x_start, $y_start, $x_end, $y_end, $type, $colour, $offset) {
+ //dbug("drawing area type: $type, at offset: $offset");
+ if ($this->parameter['zero_axis'] != 'none') {
+ $bottom = $this->calculated['boundary_box']['bottom'];
+ $zero = $this->calculated['zero_axis'];
+ if ($this->parameter['shadow_below_axis'] ) $zero += $offset;
+ $u_start = $x_start + $offset;
+ $u_end = $x_end + $offset;
+ $v_start = $bottom - $y_start + $offset;
+ $v_end = $bottom - $y_end + $offset;
+ switch ($type) {
+ case 'fill':
+ // draw it this way 'cos the FilledPolygon routine seems a bit buggy.
+ ImageFilledPolygon($this->image, array($u_start, $v_start, $u_end, $v_end, $u_end, $zero, $u_start, $zero), 4, $this->colour[$colour]);
+ ImagePolygon($this->image, array($u_start, $v_start, $u_end, $v_end, $u_end, $zero, $u_start, $zero), 4, $this->colour[$colour]);
+ break;
+ case 'open':
+ //ImagePolygon($this->image, array($u_start, $v_start, $u_end, $v_end, $u_end, $zero, $u_start, $zero), 4, $this->colour[$colour]);
+ ImageLine($this->image, $u_start, $v_start, $u_end, $v_end, $this->colour[$colour]);
+ ImageLine($this->image, $u_start, $v_start, $u_start, $zero, $this->colour[$colour]);
+ ImageLine($this->image, $u_end, $v_end, $u_end, $zero, $this->colour[$colour]);
+ break;
+ }
+ } else {
+ $bottom = $this->calculated['boundary_box']['bottom'];
+ $u_start = $x_start + $offset;
+ $u_end = $x_end + $offset;
+ $v_start = $bottom - $y_start + $offset;
+ $v_end = $bottom - $y_end + $offset;
+
+ if ($this->parameter['shadow_below_axis'] ) $bottom += $offset;
+ if ($this->parameter['inner_border'] != 'none') $bottom -= 1; // 1 pixel above bottom if border is to be drawn.
+ switch ($type) {
+ case 'fill':
+ ImageFilledPolygon($this->image, array($u_start, $v_start, $u_end, $v_end, $u_end, $bottom, $u_start, $bottom), 4, $this->colour[$colour]);
+ break;
+ case 'open':
+ ImagePolygon($this->image, array($u_start, $v_start, $u_end, $v_end, $u_end, $bottom, $u_start, $bottom), 4, $this->colour[$colour]);
+ break;
+ }
+ }
+}
+
+function line($x_start, $y_start, $x_end, $y_end, $type, $brush_type, $brush_size, $colour, $offset) {
+ //dbug("drawing line of type: $type, at offset: $offset");
+ $u_start = $x_start + $offset;
+ $v_start = $this->calculated['boundary_box']['bottom'] - $y_start + $offset;
+ $u_end = $x_end + $offset;
+ $v_end = $this->calculated['boundary_box']['bottom'] - $y_end + $offset;
+
+ switch ($type) {
+ case 'brush':
+ $this->draw_brush_line($u_start, $v_start, $u_end, $v_end, $brush_size, $brush_type, $colour);
+ break;
+ case 'line' :
+ ImageLine($this->image, $u_start, $v_start, $u_end, $v_end, $this->colour[$colour]);
+ break;
+ case 'dash':
+ ImageDashedLine($this->image, $u_start, $v_start, $u_end, $v_end, $this->colour[$colour]);
+ break;
+ }
+}
+
+// function to draw line. would prefer to use gdBrush but this is not supported yet.
+function draw_brush_line($x0, $y0, $x1, $y1, $size, $type, $colour) {
+ //$this->dbug("line: $x0, $y0, $x1, $y1");
+ $dy = $y1 - $y0;
+ $dx = $x1 - $x0;
+ $t = 0;
+ $watchdog = 1024; // precaution to prevent infinite loops.
+
+ $this->draw_brush($x0, $y0, $size, $type, $colour);
+ if (abs($dx) > abs($dy)) { // slope < 1
+ //$this->dbug("slope < 1");
+ $m = $dy / $dx; // compute slope
+ $t += $y0;
+ $dx = ($dx < 0) ? -1 : 1;
+ $m *= $dx;
+ while (round($x0) != round($x1)) {
+ if (!$watchdog--) break;
+ $x0 += $dx; // step to next x value
+ $t += $m; // add slope to y value
+ $y = round($t);
+ //$this->dbug("x0=$x0, x1=$x1, y=$y watchdog=$watchdog");
+ $this->draw_brush($x0, $y, $size, $type, $colour);
+
+ }
+ } else { // slope >= 1
+ //$this->dbug("slope >= 1");
+ $m = $dx / $dy; // compute slope
+ $t += $x0;
+ $dy = ($dy < 0) ? -1 : 1;
+ $m *= $dy;
+ while (round($y0) != round($y1)) {
+ if (!$watchdog--) break;
+ $y0 += $dy; // step to next y value
+ $t += $m; // add slope to x value
+ $x = round($t);
+ //$this->dbug("x=$x, y0=$y0, y1=$y1 watchdog=$watchdog");
+ $this->draw_brush($x, $y0, $size, $type, $colour);
+
+ }
+ }
+}
+
+function draw_brush($x, $y, $size, $type, $colour) {
+ $x = round($x);
+ $y = round($y);
+ $half = round($size / 2);
+ switch ($type) {
+ case 'circle':
+ ImageArc($this->image, $x, $y, $size, $size, 0, 360, $this->colour[$colour]);
+ ImageFillToBorder($this->image, $x, $y, $this->colour[$colour], $this->colour[$colour]);
+ break;
+ case 'square':
+ ImageFilledRectangle($this->image, $x-$half, $y-$half, $x+$half, $y+$half, $this->colour[$colour]);
+ break;
+ case 'vertical':
+ ImageFilledRectangle($this->image, $x, $y-$half, $x+1, $y+$half, $this->colour[$colour]);
+ break;
+ case 'horizontal':
+ ImageFilledRectangle($this->image, $x-$half, $y, $x+$half, $y+1, $this->colour[$colour]);
+ break;
+ case 'slash':
+ ImageFilledPolygon($this->image, array($x+$half, $y-$half,
+ $x+$half+1, $y-$half,
+ $x-$half+1, $y+$half,
+ $x-$half, $y+$half
+ ), 4, $this->colour[$colour]);
+ break;
+ case 'backslash':
+ ImageFilledPolygon($this->image, array($x-$half, $y-$half,
+ $x-$half+1, $y-$half,
+ $x+$half+1, $y+$half,
+ $x+$half, $y+$half
+ ), 4, $this->colour[$colour]);
+ break;
+ default:
+ @eval($type); // user can create own brush script.
+ }
+}
+
+} // class graph
+
+
+?>
projects / moodle.git / commitdiff