Java tutorial
/* * Copyright (C) 2000 - 2008 TagServlet Ltd * * This file is part of Open BlueDragon (OpenBD) CFML Server Engine. * * OpenBD is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * Free Software Foundation,version 3. * * OpenBD 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 OpenBD. If not, see http://www.gnu.org/licenses/ * * Additional permission under GNU GPL version 3 section 7 * * If you modify this Program, or any covered work, by linking or combining * it with any of the JARS listed in the README.txt (or a modified version of * (that library), containing parts covered by the terms of that JAR, the * licensors of this Program grant you additional permission to convey the * resulting work. * README.txt @ http://www.openbluedragon.org/license/README.txt * * http://www.openbluedragon.org/ */ package com.newatlanta.bluedragon; import java.awt.Graphics2D; import java.awt.geom.Rectangle2D; import java.io.Serializable; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.labels.XYToolTipGenerator; import org.jfree.chart.plot.CrosshairState; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.PlotRenderingInfo; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYAreaRenderer; import org.jfree.chart.renderer.xy.XYItemRendererState; import org.jfree.chart.urls.XYURLGenerator; import org.jfree.data.xy.XYDataset; import org.jfree.util.PublicCloneable; /** * Area item renderer for an {@link XYPlot}. This class can draw (a) shapes at * each point, or (b) lines between points, or (c) both shapes and lines, or (d) * filled areas, or (e) filled areas and shapes. */ public class CustomXYAreaRenderer extends XYAreaRenderer implements Cloneable, PublicCloneable, Serializable { /** For serialization. */ private static final long serialVersionUID = -4481971353973876747L; /** * Constructs a new renderer. */ public CustomXYAreaRenderer() { super(); } /** * Constructs a new renderer. * * @param type * the type of the renderer. */ public CustomXYAreaRenderer(int type) { super(type, null, null); } /** * Constructs a new renderer. * <p> * To specify the type of renderer, use one of the constants: SHAPES, LINES, * SHAPES_AND_LINES, AREA or AREA_AND_SHAPES. * * @param type * the type of renderer. * @param toolTipGenerator * the tool tip generator to use (<code>null</code> permitted). * @param urlGenerator * the URL generator (<code>null</code> permitted). */ public CustomXYAreaRenderer(int type, XYToolTipGenerator toolTipGenerator, XYURLGenerator urlGenerator) { super(type, toolTipGenerator, urlGenerator); } public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item, CrosshairState crosshairState, int pass) { super.drawItem(g2, state, dataArea, info, plot, domainAxis, rangeAxis, dataset, series, item, crosshairState, pass); // The complete area chart is drawn when drawItem() is called for the last // item // so we need to draw all of the item labels after the last item so they'll // be // visible if they overlap the area chart. int itemCount = dataset.getItemCount(series); if (getPlotArea() && item > 0 && item == (itemCount - 1)) { // this is the last item so draw the item labels PlotOrientation orientation = plot.getOrientation(); for (int i = 0; i < itemCount; i++) { if (isItemLabelVisible(series, i)) { double xValue = dataset.getXValue(series, i); double yValue = dataset.getYValue(series, i); if (Double.isNaN(yValue)) { yValue = 0.0; } double transXValue = domainAxis.valueToJava2D(xValue, dataArea, plot.getDomainAxisEdge()); double transYValue = rangeAxis.valueToJava2D(yValue, dataArea, plot.getRangeAxisEdge()); double xx = transXValue; double yy = transYValue; if (orientation == PlotOrientation.HORIZONTAL) { xx = transYValue; yy = transXValue; } drawItemLabel(g2, orientation, dataset, series, i, xx, yy, (yValue < 0.0)); } } } } }