Java tutorial
// ============================================================================ // // Copyright (C) 2006-2017 Talend Inc. - www.talend.com // // This source code is available under agreement available at // %InstallDIR%\features\org.talend.rcp.branding.%PRODUCTNAME%\%PRODUCTNAME%license.txt // // You should have received a copy of the agreement // along with this program; if not, write to Talend SA // 9 rue Pages 92150 Suresnes, France // // ============================================================================ package org.talend.dataprofiler.chart.util; import java.awt.Point; import java.awt.geom.Point2D; import java.awt.geom.Rectangle2D; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.widgets.Composite; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.labels.HighLowItemLabelGenerator; import org.jfree.chart.labels.StandardXYToolTipGenerator; import org.jfree.chart.plot.CombinedDomainXYPlot; import org.jfree.chart.plot.Plot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.PlotRenderingInfo; import org.jfree.chart.plot.XYPlot; import org.jfree.data.xy.OHLCDataset; import org.jfree.data.xy.XYDataset; import org.jfree.experimental.chart.swt.ChartComposite; import org.jfree.ui.RectangleEdge; /** * DOC bzhou class global comment. Detailled comment */ public class ToolTipChartComposite extends ChartComposite { public ToolTipChartComposite(Composite comp, int style, JFreeChart chart, boolean useBuffer) { super(comp, style, chart, useBuffer); // TODO Auto-generated constructor stub } /** * Returns a string for the tooltip. * * @param e the mouse event. * * @return A tool tip or <code>null</code> if no tooltip is available. */ @Override public String getToolTipText(org.eclipse.swt.events.MouseEvent e) { // OK, we're using an SWT MouseEvent here, not much difference... String result = getTooltipAtPoint(new Point(e.x, e.y)); if (result != null) { return result; } return super.getToolTipText(); } private static int hotspontsize = 5; private HighLowItemLabelGenerator hiLoTips = new HighLowItemLabelGenerator(); private StandardXYToolTipGenerator xyTips = new StandardXYToolTipGenerator(); /** * This method attempts to get a tooltip by converting the screen X,Y into Chart Area X,Y and then looking for a * data point in a data set that lies inside a hotspot around that value. * * @param point The Java 2D point * @return A string for the data at the point or null if no data is found. */ protected String getTooltipAtPoint(Point point) { String result = null; Point2D translatedPoint = this.translateScreenToJava2D(point); Plot plot = this.getChart().getPlot(); PlotRenderingInfo info = this.getChartRenderingInfo().getPlotInfo(); if (plot instanceof CombinedDomainXYPlot) { int index = info.getSubplotIndex(translatedPoint); if (index < 0) { index = 0; } plot = (Plot) ((CombinedDomainXYPlot) plot).getSubplots().get(index); info = this.getChartRenderingInfo().getPlotInfo().getSubplotInfo(index); } if (plot != null && plot instanceof XYPlot) { XYPlot xyPlot = (XYPlot) plot; ValueAxis domainAxis = xyPlot.getDomainAxis(); ValueAxis rangeAxis = xyPlot.getRangeAxis(); // had to switch to SWT's rectangle here. Rectangle screenArea = this.scale(info.getDataArea()); double hotspotSizeX = hotspontsize * this.getScaleX(); double hotspotSizeY = hotspontsize * this.getScaleY(); double x0 = point.getX(); double y0 = point.getY(); double x1 = x0 - hotspotSizeX; double y1 = y0 + hotspotSizeY; double x2 = x0 + hotspotSizeX; double y2 = y0 - hotspotSizeY; RectangleEdge xEdge = RectangleEdge.BOTTOM; RectangleEdge yEdge = RectangleEdge.LEFT; // Switch everything for horizontal charts if (xyPlot.getOrientation() == PlotOrientation.HORIZONTAL) { hotspotSizeX = hotspontsize * this.getScaleY(); hotspotSizeY = hotspontsize * this.getScaleX(); x0 = point.getY(); y0 = point.getX(); x1 = x0 + hotspotSizeX; y1 = y0 - hotspotSizeY; x2 = x0 - hotspotSizeX; y2 = y0 + hotspotSizeY; xEdge = RectangleEdge.LEFT; yEdge = RectangleEdge.BOTTOM; } // OK, here we have to get ourselves back into AWT land... Rectangle2D r2d = new Rectangle2D.Double(); r2d.setRect(screenArea.x, screenArea.y, screenArea.width, screenArea.height); double ty0 = rangeAxis.java2DToValue(y0, r2d, yEdge); double tx1 = domainAxis.java2DToValue(x1, r2d, xEdge); double ty1 = rangeAxis.java2DToValue(y1, r2d, yEdge); double tx2 = domainAxis.java2DToValue(x2, r2d, xEdge); double ty2 = rangeAxis.java2DToValue(y2, r2d, yEdge); int datasetCount = xyPlot.getDatasetCount(); for (int datasetIndex = 0; datasetIndex < datasetCount; datasetIndex++) { XYDataset dataset = xyPlot.getDataset(datasetIndex); int seriesCount = dataset.getSeriesCount(); for (int series = 0; series < seriesCount; series++) { int itemCount = dataset.getItemCount(series); if (dataset instanceof OHLCDataset) { // This could be optimized to use a binary search for x first for (int item = 0; item < itemCount; item++) { double xValue = dataset.getXValue(series, item); double yValueHi = ((OHLCDataset) dataset).getHighValue(series, item); double yValueLo = ((OHLCDataset) dataset).getLowValue(series, item); // Check hi lo and swap if needed if (yValueHi < yValueLo) { double temp = yValueHi; yValueHi = yValueLo; yValueLo = temp; } // Check if the dataset 'X' value lies between the hotspot (tx1 < xValue < tx2) if (tx1 < xValue && xValue < tx2) { // Check if the cursor 'y' value lies between the high and low (low < ty0 < high) if (yValueLo < ty0 && ty0 < yValueHi) { return hiLoTips.generateToolTip(dataset, series, item); } } } } else { // This could be optimized to use a binary search for x first for (int item = 0; item < itemCount; item++) { double xValue = dataset.getXValue(series, item); double yValue = dataset.getYValue(series, item); // Check if the dataset 'X' value lies between the hotspot (tx1< xValue < tx2) if (tx1 < xValue && xValue < tx2) { // Check if the dataset 'Y' value lies between the hotspot (ty1 < yValue < ty2) if (ty1 < yValue && yValue < ty2) { return xyTips.generateToolTip(dataset, series, item); } } } } } } } return result; } public HighLowItemLabelGenerator getHiLoTips() { return this.hiLoTips; } public void setHiLoTips(HighLowItemLabelGenerator hiLoTips) { this.hiLoTips = hiLoTips; } public StandardXYToolTipGenerator getXyTips() { return this.xyTips; } public void setXyTips(StandardXYToolTipGenerator xyTips) { this.xyTips = xyTips; } }