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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 | <?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/>.
*
*/
/**
* Object representing the bounds of a dataset (its minimal and maximal values) on its vertical axis.
* The bounds are automatically calculated from a XYDataSet or XYSeriesDataSet.
* Default (calculated) bounds can be overriden using the setLowerBound() and setUpperBound() methods.
*
* @author Jean-Marc Tr�meaux (jm.tremeaux at gmail.com)
* Created on 25 july 2007
*/
class Bound {
/**
* Manually set lower bound, overrides the value calculated by computeBound().
*/
private $lowerBound = null;
/**
* Manually set upper bound, overrides the value calculated by computeBound().
*/
private $upperBound = null;
/**
* Computed min bound.
*/
private $yMinValue = null;
/**
* Computed max bound.
*/
private $yMaxValue = null;
/**
* Compute the boundaries on the axis.
*
* @param dataSet The data set
*/
public function computeBound($dataSet) {
// Check if the data set is empty
$dataSetEmpty = true;
$serieList = null;
if ($dataSet instanceof XYDataSet) {
$pointList = $dataSet->getPointList();
$dataSetEmpty = count($pointList) == 0;
if (!$dataSetEmpty) {
// Process it as a serie
$serieList = array();
array_push($serieList, $dataSet);
}
} else if ($dataSet instanceof XYSeriesDataSet) {
$serieList = $dataSet->getSerieList();
if (count($serieList) > 0) {
$serie = current($serieList);
$dataSetEmpty = count($serie) == 0;
}
} else {
die("Error: unknown dataset type");
}
// If the dataset is empty, default some bounds
$yMin = 0;
$yMax = 1;
if (!$dataSetEmpty) {
// Compute lower and upper bound on the value axis
unset($yMin);
unset($yMax);
foreach ($serieList as $serie) {
foreach ($serie->getPointList() as $point) {
$y = $point->getY();
if (!isset($yMin)) {
$yMin = $y;
$yMax = $y;
} else {
if ($y < $yMin) {
$yMin = $y;
}
if ($y > $yMax) {
$yMax = $y;
}
}
}
}
}
$this->yMinValue = isset($this->lowerBound) ? $this->lowerBound : $yMin;
$this->yMaxValue = isset($this->upperBound) ? $this->upperBound : $yMax;
}
/**
* Getter of yMinValue.
*
* @return min bound
*/
public function getYMinValue() {
return $this->yMinValue;
}
/**
* Getter of yMaxValue.
*
* @return max bound
*/
public function getYMaxValue() {
return $this->yMaxValue;
}
/**
* Set manually the lower boundary value (overrides the automatic formatting).
* Typical usage is to set the bars starting from zero.
*
* @param double lower boundary value
*/
public function setLowerBound($lowerBound) {
$this->lowerBound = $lowerBound;
}
/**
* Set manually the upper boundary value (overrides the automatic formatting).
*
* @param double upper boundary value
*/
public function setUpperBound($upperBound) {
$this->upperBound = $upperBound;
}
}
?> |