--- /dev/null
+<?php
+ /* Libchart - PHP chart library
+ * Copyright (C) 2005-2008 Jean-Marc Tr�meaux (jm.tremeaux at gmail.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+ /**
+ * Pie chart.
+ *
+ * @author Jean-Marc Tr�meaux (jm.tremeaux at gmail.com)
+ */
+ class PieChart extends Chart {
+ protected $pieCenterX;
+ protected $pieCenterY;
+
+ /**
+ * Constructor of a pie chart.
+ *
+ * @param integer width of the image
+ * @param integer height of the image
+ */
+ public function PieChart($width = 600, $height = 250) {
+ parent::Chart($width, $height);
+ $this->plot->setGraphPadding(new Padding(15, 10, 30, 30));
+ }
+
+ /**
+ * Computes the layout.
+ */
+ protected function computeLayout($hasCaption = true) {
+ $this->plot->setHasCaption($hasCaption);
+ $this->plot->computeLayout();
+
+ // Get the graph area
+ $graphArea = $this->plot->getGraphArea();
+
+ // Compute the coordinates of the pie
+ $this->pieCenterX = $graphArea->x1 + ($graphArea->x2 - $graphArea->x1) / 2;
+ $this->pieCenterY = $graphArea->y1 + ($graphArea->y2 - $graphArea->y1) / 2;
+
+ $this->pieWidth = round(($graphArea->x2 - $graphArea->x1) * 4 / 5);
+ $this->pieHeight = round(($graphArea->y2 - $graphArea->y1) * 3.7 / 5);
+ $this->pieDepth = round($this->pieWidth * 0.05);
+ }
+
+ /**
+ * Compare two sampling point values, order from biggest to lowest value.
+ *
+ * @param double first value
+ * @param double second value
+ * @return integer result of the comparison
+ */
+ protected function sortPie($v1, $v2) {
+ return $v1[0] == $v2[0] ? 0 :
+ $v1[0] > $v2[0] ? -1 :
+ 1;
+ }
+
+ /**
+ * Compute pie values in percentage and sort them.
+ */
+ protected function computePercent() {
+ $this->total = 0;
+ $this->percent = array();
+
+ $pointList = $this->dataSet->getPointList();
+ foreach ($pointList as $point) {
+ $this->total += $point->getY();
+ }
+
+ foreach ($pointList as $point) {
+ $percent = $this->total == 0 ? 0 : 100 * $point->getY() / $this->total;
+
+ array_push($this->percent, array($percent, $point));
+ }
+
+ usort($this->percent, array("PieChart", "sortPie"));
+ }
+
+ /**
+ * Creates the pie chart image.
+ */
+ protected function createImage() {
+ parent::createImage();
+
+ // Get graphical obects
+ $img = $this->plot->getImg();
+ $palette = $this->plot->getPalette();
+ $primitive = $this->plot->getPrimitive();
+
+ // Get the graph area
+ $graphArea = $this->plot->getGraphArea();
+
+ // Legend box
+ $primitive->outlinedBox($graphArea->x1, $graphArea->y1, $graphArea->x2, $graphArea->y2, $palette->axisColor[0], $palette->axisColor[1]);
+
+ // Aqua-like background
+ for ($i = $graphArea->y1 + 2; $i < $graphArea->y2 - 1; $i++) {
+ $color = $palette->aquaColor[($i + 3) % 4];
+ $primitive->line($graphArea->x1 + 2, $i, $graphArea->x2 - 2, $i, $color);
+ }
+ }
+
+ /**
+ * Renders the caption.
+ */
+ protected function printCaption() {
+ // Create a list of labels
+ $labelList = array();
+ foreach($this->percent as $percent) {
+ list($percent, $point) = $percent;
+ $label = $point->getX();
+
+ array_push($labelList, $label);
+ }
+
+ // Create the caption
+ $caption = new Caption();
+ $caption->setPlot($this->plot);
+ $caption->setLabelList($labelList);
+
+ $palette = $this->plot->getPalette();
+ $pieColorSet = $palette->pieColorSet;
+ $caption->setColorSet($pieColorSet);
+
+ // Render the caption
+ $caption->render();
+ }
+
+ /**
+ * Draw a 2D disc.
+ *
+ * @param integer Center coordinate (y)
+ * @param array Colors for each portion
+ * @param bitfield Drawing mode
+ */
+ protected function drawDisc($cy, $colorArray, $mode) {
+ // Get graphical obects
+ $img = $this->plot->getImg();
+
+ $i = 0;
+ $angle1 = 0;
+ $percentTotal = 0;
+
+ foreach ($this->percent as $a) {
+ list ($percent, $point) = $a;
+
+ // If value is null, don't draw this arc
+ if ($percent <= 0) {
+ continue;
+ }
+
+ $color = $colorArray[$i % count($colorArray)];
+ $percentTotal += $percent;
+ $angle2 = (int)($percentTotal * 360 / 100);
+
+ if ($angle2 - $angle1 <= 0)
+ $angle2 = $angle1 + 1;
+ imagefilledarc($img, $this->pieCenterX, $cy, $this->pieWidth, $this->pieHeight, $angle1, $angle2, $color->getColor($img), $mode);
+
+ $angle1 = $angle2;
+
+ $i++;
+ }
+ }
+
+ /**
+ * Print the percentage text.
+ */
+ protected function drawPercent() {
+ // Get graphical obects
+ $img = $this->plot->getImg();
+ $palette = $this->plot->getPalette();
+ $text = $this->plot->getText();
+ $primitive = $this->plot->getPrimitive();
+
+ $angle1 = 0;
+ $percentTotal = 0;
+
+ foreach ($this->percent as $a) {
+ list ($percent, $point) = $a;
+
+ // If value is null, don't print percentage
+ if ($percent <= 0) {
+ continue;
+ }
+
+ $percentTotal += $percent;
+ $angle2 = $percentTotal * 2 * M_PI / 100;
+
+ $angle = $angle1 + ($angle2 - $angle1) / 2;
+ $label = number_format($percent) . "%";
+
+ $x = cos($angle) * ($this->pieWidth + 35) / 2 + $this->pieCenterX;
+ $y = sin($angle) * ($this->pieHeight + 35) / 2 + $this->pieCenterY;
+
+ $text->printText($img, $x, $y, $this->plot->getTextColor(), $label, $text->fontCondensed, $text->HORIZONTAL_CENTER_ALIGN | $text->VERTICAL_CENTER_ALIGN);
+
+ $angle1 = $angle2;
+ }
+ }
+
+ /**
+ * Print the pie chart.
+ */
+ protected function printPie() {
+ // Get graphical obects
+ $img = $this->plot->getImg();
+ $palette = $this->plot->getPalette();
+ $text = $this->plot->getText();
+ $primitive = $this->plot->getPrimitive();
+
+ // Get the pie color set
+ $pieColorSet = $palette->pieColorSet;
+ $pieColorSet->reset();
+
+ // Silhouette
+ for ($cy = $this->pieCenterY + $this->pieDepth / 2; $cy >= $this->pieCenterY - $this->pieDepth / 2; $cy--) {
+ $this->drawDisc($cy, $palette->pieColorSet->shadowColorList, IMG_ARC_EDGED);
+ }
+
+ // Top
+ $this->drawDisc($this->pieCenterY - $this->pieDepth / 2, $palette->pieColorSet->colorList, IMG_ARC_PIE);
+
+ // Top Outline
+ $this->drawPercent();
+ }
+
+ /**
+ * Render the chart image.
+ *
+ * @param string name of the file to render the image to (optional)
+ */
+ public function render($fileName = null) {
+ $this->computePercent();
+ $this->computeLayout();
+ $this->createImage();
+ $this->plot->printLogo();
+ $this->plot->printTitle();
+ $this->printPie();
+ $this->printCaption();
+
+ $this->plot->render($fileName);
+ }
+ }
+?>
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projects / timetracker.git / blobdiff