--- /dev/null
+<?php
+ /* Libchart - PHP chart library
+ * Copyright (C) 2005-2008 Jean-Marc Trémeaux (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/>.
+ *
+ */
+
+ /**
+ * Line chart.
+ *
+ * @author Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+ */
+ class LineChart extends BarChart {
+ /**
+ * Creates a new line chart.
+ * Line charts allow for XYDataSet and XYSeriesDataSet in order to plot several lines.
+ *
+ * @param integer width of the image
+ * @param integer height of the image
+ */
+ public function LineChart($width = 600, $height = 250) {
+ parent::BarChart($width, $height);
+
+ $this->plot->setGraphPadding(new Padding(5, 30, 50, 50));
+ }
+
+ /**
+ * Computes the layout.
+ */
+ protected function computeLayout() {
+ if ($this->hasSeveralSerie) {
+ $this->plot->setHasCaption(true);
+ }
+ $this->plot->computeLayout();
+ }
+
+ /**
+ * Print the axis.
+ */
+ protected function printAxis() {
+ $minValue = $this->axis->getLowerBoundary();
+ $maxValue = $this->axis->getUpperBoundary();
+ $stepValue = $this->axis->getTics();
+
+ // Get graphical obects
+ $img = $this->plot->getImg();
+ $palette = $this->plot->getPalette();
+ $text = $this->plot->getText();
+
+ // Get the graph area
+ $graphArea = $this->plot->getGraphArea();
+
+ // Vertical axis
+ for ($value = $minValue; $value <= $maxValue; $value += $stepValue) {
+ $y = $graphArea->y2 - ($value - $minValue) * ($graphArea->y2 - $graphArea->y1) / ($this->axis->displayDelta);
+
+ imagerectangle($img, $graphArea->x1 - 3, $y, $graphArea->x1 - 2, $y + 1, $palette->axisColor[0]->getColor($img));
+ imagerectangle($img, $graphArea->x1 - 1, $y, $graphArea->x1, $y + 1, $palette->axisColor[1]->getColor($img));
+
+ $text->printText($img, $graphArea->x1 - 5, $y, $this->plot->getTextColor(), $value, $text->fontCondensed, $text->HORIZONTAL_RIGHT_ALIGN | $text->VERTICAL_CENTER_ALIGN);
+ }
+
+ // Get first serie of a list
+ $pointList = $this->getFirstSerieOfList();
+
+ // Horizontal Axis
+ $pointCount = count($pointList);
+ reset($pointList);
+ $columnWidth = ($graphArea->x2 - $graphArea->x1) / ($pointCount - 1);
+
+ for ($i = 0; $i < $pointCount; $i++) {
+ $x = $graphArea->x1 + $i * $columnWidth;
+
+ imagerectangle($img, $x - 1, $graphArea->y2 + 2, $x, $graphArea->y2 + 3, $palette->axisColor[0]->getColor($img));
+ imagerectangle($img, $x - 1, $graphArea->y2, $x, $graphArea->y2 + 1, $palette->axisColor[1]->getColor($img));
+
+ $point = current($pointList);
+ next($pointList);
+
+ $label = $point->getX();
+
+ $text->printDiagonal($img, $x - 5, $graphArea->y2 + 10, $this->plot->getTextColor(), $label);
+ }
+ }
+
+ /**
+ * Print the lines.
+ */
+ protected function printLine() {
+ $minValue = $this->axis->getLowerBoundary();
+ $maxValue = $this->axis->getUpperBoundary();
+
+ // Get the data as a list of series for consistency
+ $serieList = $this->getDataAsSerieList();
+
+ // Get graphical obects
+ $img = $this->plot->getImg();
+ $palette = $this->plot->getPalette();
+ $text = $this->plot->getText();
+ $primitive = $this->plot->getPrimitive();
+
+ // Get the graph area
+ $graphArea = $this->plot->getGraphArea();
+
+ $lineColorSet = $palette->lineColorSet;
+ $lineColorSet->reset();
+ for ($j = 0; $j < count($serieList); $j++) {
+ $serie = $serieList[$j];
+ $pointList = $serie->getPointList();
+ $pointCount = count($pointList);
+ reset($pointList);
+
+ $columnWidth = ($graphArea->x2 - $graphArea->x1) / ($pointCount - 1);
+
+ $lineColor = $lineColorSet->currentColor();
+ $lineColorShadow = $lineColorSet->currentShadowColor();
+ $lineColorSet->next();
+ $x1 = null;
+ $y1 = null;
+ for ($i = 0; $i < $pointCount; $i++) {
+ $x2 = $graphArea->x1 + $i * $columnWidth;
+
+ $point = current($pointList);
+ next($pointList);
+
+ $value = $point->getY();
+
+ $y2 = $graphArea->y2 - ($value - $minValue) * ($graphArea->y2 - $graphArea->y1) / ($this->axis->displayDelta);
+
+ // Draw line
+ if ($x1) {
+ $primitive->line($x1, $y1, $x2, $y2, $lineColor, 4);
+ $primitive->line($x1, $y1 - 1, $x2, $y2 - 1, $lineColorShadow, 2);
+ }
+
+ $x1 = $x2;
+ $y1 = $y2;
+ }
+ }
+ }
+
+ /**
+ * Renders the caption.
+ */
+ protected function printCaption() {
+ // Get the list of labels
+ $labelList = $this->dataSet->getTitleList();
+
+ // Create the caption
+ $caption = new Caption();
+ $caption->setPlot($this->plot);
+ $caption->setLabelList($labelList);
+
+ $palette = $this->plot->getPalette();
+ $lineColorSet = $palette->lineColorSet;
+ $caption->setColorSet($lineColorSet);
+
+ // Render the caption
+ $caption->render();
+ }
+
+ /**
+ * Render the chart image.
+ *
+ * @param string name of the file to render the image to (optional)
+ */
+ public function render($fileName = null) {
+ // Check the data model
+ $this->checkDataModel();
+
+ $this->bound->computeBound($this->dataSet);
+ $this->computeAxis();
+ $this->computeLayout();
+ $this->createImage();
+ $this->plot->printLogo();
+ $this->plot->printTitle();
+ if (!$this->isEmptyDataSet(2)) {
+ $this->printAxis();
+ $this->printLine();
+ if ($this->hasSeveralSerie) {
+ $this->printCaption();
+ }
+ }
+
+ $this->plot->render($fileName);
+ }
+ }
+?>
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projects / timetracker.git / blobdiff