--- /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/>.
+ *
+ */
+
+ /**
+ * 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 Trémeaux (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 = $y;
+ }
+ }
+ }
+ }
+ }
+
+ // If user specified bounds and they are actually greater than computer bounds, override computed bounds
+ if (isset($this->lowerBound) && $this->lowerBound < $yMin) {
+ $this->yMinValue = $this->lowerBound;
+ } else {
+ $this->yMinValue = $yMin;
+ }
+
+ if (isset($this->upperBound) && $this->upperBound > $yMax) {
+ $this->yMaxValue = $this->upperBound;
+ } else {
+ $this->yMaxValue = $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;
+ }
+ }
+?>
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projects / timetracker.git / blobdiff