X-Git-Url: http://wagnertech.de/gitweb/gitweb.cgi/timetracker.git/blobdiff_plain/098a79f0819ebb89b7d48df4a6b154af4560f68e..9a23a8c0a51b7ec38a96f525484134f3cb85dc7e:/WEB-INF/lib/libchart/classes/view/axis/Bound.php

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+<?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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