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07c3cdd | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | <?php
/* Libchart - PHP chart library
* Copyright (C) 2005-2007 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/>.
*
*/
/**
* Base abstract class for rendering both horizontal and vertical bar charts.
*
* @author Jean-Marc Tr�meaux (jm.tremeaux at gmail.com)
*/
abstract class BarChart extends Chart {
protected $bound;
protected $axis;
protected $hasSeveralSerie;
/**
* Creates a new bar chart.
*
* @param integer width of the image
* @param integer height of the image
*/
protected function BarChart($width, $height) {
parent::Chart($width, $height);
// Initialize the bounds
$this->bound = new Bound();
$this->bound->setLowerBound(0);
}
/**
* Compute the axis.
*/
protected function computeAxis() {
$this->axis = new Axis($this->bound->getYMinValue(), $this->bound->getYMaxValue());
$this->axis->computeBoundaries();
}
/**
* Create the image.
*/
protected function createImage() {
parent::createImage();
// Get graphical obects
$img = $this->plot->getImg();
$palette = $this->plot->getPalette();
$text = $this->plot->getText();
$primitive = $this->plot->getPrimitive();
// Get the graph area
$graphArea = $this->plot->getGraphArea();
// Aqua-like background
for ($i = $graphArea->y1; $i < $graphArea->y2; $i++) {
$color = $palette->aquaColor[($i + 3) % 4];
$primitive->line($graphArea->x1, $i, $graphArea->x2, $i, $color);
}
// Axis
imagerectangle($img, $graphArea->x1 - 1, $graphArea->y1, $graphArea->x1, $graphArea->y2, $palette->axisColor[0]->getColor($img));
imagerectangle($img, $graphArea->x1 - 1, $graphArea->y2, $graphArea->x2, $graphArea->y2 + 1, $palette->axisColor[0]->getColor($img));
}
/**
* Returns true if the data set has some data.
* @param minNumberOfPoint Minimum number of points (1 for bars, 2 for lines).
*
* @return true if data set empty
*/
protected function isEmptyDataSet($minNumberOfPoint) {
if ($this->dataSet instanceof XYDataSet) {
$pointList = $this->dataSet->getPointList();
$pointCount = count($pointList);
return $pointCount < $minNumberOfPoint;
} else if ($this->dataSet instanceof XYSeriesDataSet) {
$serieList = $this->dataSet->getSerieList();
reset($serieList);
if (count($serieList) > 0) {
$serie = current($serieList);
$pointList = $serie->getPointList();
$pointCount = count($pointList);
return $pointCount < $minNumberOfPoint;
}
} else {
die("Error: unknown dataset type");
}
}
/**
* Checks the data model before rendering the graph.
*/
protected function checkDataModel() {
// Check if a dataset was defined
if (!$this->dataSet) {
die("Error: No dataset defined.");
}
// Bar charts accept both XYDataSet and XYSeriesDataSet
if ($this->dataSet instanceof XYDataSet) {
// The dataset contains only one serie
$this->hasSeveralSerie = false;
} else if ($this->dataSet instanceof XYSeriesDataSet) {
// Check if each series has the same number of points
unset($lastPointCount);
$serieList = $this->dataSet->getSerieList();
for ($i = 0; $i < count($serieList); $i++) {
$serie = $serieList[$i];
$pointCount = count($serie->getPointList());
if (isset($lastPointCount) && $pointCount != $lastPointCount) {
die("Error: serie <" . $i . "> doesn't have the same number of points as last serie (last one: <" . $lastPointCount. ">, this one: <" . $pointCount. ">).");
}
$lastPointCount = $pointCount;
}
// The dataset contains several series
$this->hasSeveralSerie = true;
} else {
die("Error: Bar chart accept only XYDataSet and XYSeriesDataSet");
}
}
/**
* Return the data as a series list (for consistency).
*
* @return List of series
*/
protected function getDataAsSerieList() {
// Get the data as a series list
$serieList = null;
if ($this->dataSet instanceof XYSeriesDataSet) {
$serieList = $this->dataSet->getSerieList();
} else if ($this->dataSet instanceof XYDataSet) {
$serieList = array();
array_push($serieList, $this->dataSet);
}
return $serieList;
}
/**
* Return the first serie of the list, or the dataSet itself if there is no serie.
*
* @return XYDataSet
*/
protected function getFirstSerieOfList() {
$pointList = null;
if ($this->dataSet instanceof XYSeriesDataSet) {
// For a series dataset, print the legend from the first serie
$serieList = $this->dataSet->getSerieList();
reset($serieList);
$serie = current($serieList);
$pointList = $serie->getPointList();
} else if ($this->dataSet instanceof XYDataSet) {
$pointList = $this->dataSet->getPointList();
}
return $pointList;
}
}
?> |