001/* ================================================
002 * JFreeChart-FX : JavaFX extensions for JFreeChart
003 * ================================================
004 *
005 * (C) Copyright 2017, by Object Refinery Limited and Contributors.
006 *
007 * Project Info:  https://github.com/jfree/jfreechart-fx
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
022 * USA.
023 *
024 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
025 * Other names may be trademarks of their respective owners.]
026 *
027 * -----------------------
028 * CrosshairOverlayFX.java
029 * -----------------------
030 * (C) Copyright 2016, 2017 by Object Refinery Limited and Contributors.
031 *
032 * Original Author:  David Gilbert (for Object Refinery Limited);
033 * Contributor(s):   -;
034 *
035 */
036
037package org.jfree.chart.fx.overlay;
038
039import java.awt.Graphics2D;
040import java.awt.Shape;
041import java.awt.geom.Rectangle2D;
042import java.util.Iterator;
043import org.jfree.chart.JFreeChart;
044import org.jfree.chart.axis.ValueAxis;
045import org.jfree.chart.fx.ChartCanvas;
046import org.jfree.chart.fx.ChartViewer;
047import org.jfree.chart.panel.CrosshairOverlay;
048import org.jfree.chart.plot.Crosshair;
049import org.jfree.chart.plot.PlotOrientation;
050import org.jfree.chart.plot.XYPlot;
051import org.jfree.chart.ui.RectangleEdge;
052
053/**
054 * An overlay for a {@link ChartViewer} that draws crosshairs on a plot.
055 */
056public class CrosshairOverlayFX extends CrosshairOverlay implements OverlayFX {
057
058    @Override
059    public void paintOverlay(Graphics2D g2, ChartCanvas chartCanvas) {
060        if (chartCanvas.getRenderingInfo() == null) {
061            return;
062        }
063        Shape savedClip = g2.getClip();
064        Rectangle2D dataArea = chartCanvas.getRenderingInfo().getPlotInfo().getDataArea();
065        g2.clip(dataArea);
066        JFreeChart chart = chartCanvas.getChart();
067        XYPlot plot = (XYPlot) chart.getPlot();
068        ValueAxis xAxis = plot.getDomainAxis();
069        RectangleEdge xAxisEdge = plot.getDomainAxisEdge();
070        Iterator iterator = getDomainCrosshairs().iterator();
071        while (iterator.hasNext()) {
072            Crosshair ch = (Crosshair) iterator.next();
073            if (ch.isVisible()) {
074                double x = ch.getValue();
075                double xx = xAxis.valueToJava2D(x, dataArea, xAxisEdge);
076                if (plot.getOrientation() == PlotOrientation.VERTICAL) {
077                    drawVerticalCrosshair(g2, dataArea, xx, ch);
078                } else {
079                    drawHorizontalCrosshair(g2, dataArea, xx, ch);
080                }
081            }
082        }
083        ValueAxis yAxis = plot.getRangeAxis();
084        RectangleEdge yAxisEdge = plot.getRangeAxisEdge();
085        iterator = getRangeCrosshairs().iterator();
086        while (iterator.hasNext()) {
087            Crosshair ch = (Crosshair) iterator.next();
088            if (ch.isVisible()) {
089                double y = ch.getValue();
090                double yy = yAxis.valueToJava2D(y, dataArea, yAxisEdge);
091                if (plot.getOrientation() == PlotOrientation.VERTICAL) {
092                    drawHorizontalCrosshair(g2, dataArea, yy, ch);
093                } else {
094                    drawVerticalCrosshair(g2, dataArea, yy, ch);
095                }
096            }
097        }
098        g2.setClip(savedClip);
099    }
100    
101}