List of usage examples for org.jfree.chart ChartPanel translateScreenToJava2D
public Point2D translateScreenToJava2D(Point screenPoint)
From source file:net.sf.mzmine.chartbasics.ChartLogics.java
/** * Translates mouse coordinates to chart coordinates (xy-axis) * //from w w w.j av a2 s . c om * @param myChart * @param mouseX * @param mouseY * @return Range as chart coordinates * @throws Exception */ public static Point2D mouseXYToPlotXY(ChartPanel myChart, int mouseX, int mouseY) throws Exception { Point2D p = myChart.translateScreenToJava2D(new Point(mouseX, mouseY)); XYPlot plot = null; // find plot as parent of axis ChartEntity entity = findChartEntity(myChart, mouseX, mouseY); if (entity instanceof AxisEntity) { Axis a = ((AxisEntity) entity).getAxis(); if (a.getPlot() instanceof XYPlot) plot = (XYPlot) a.getPlot(); } ChartRenderingInfo info = myChart.getChartRenderingInfo(); int subplot = info.getPlotInfo().getSubplotIndex(p); Rectangle2D dataArea = info.getPlotInfo().getDataArea(); if (subplot != -1) dataArea = info.getPlotInfo().getSubplotInfo(subplot).getDataArea(); if (plot == null) plot = findXYSubplot(myChart.getChart(), info, p.getX(), p.getY()); // coordinates double cx = 0; double cy = 0; if (plot != null) { // find axis ValueAxis domainAxis = plot.getDomainAxis(); ValueAxis rangeAxis = plot.getRangeAxis(); RectangleEdge domainAxisEdge = plot.getDomainAxisEdge(); RectangleEdge rangeAxisEdge = plot.getRangeAxisEdge(); // parent? if (domainAxis == null && plot.getParent() != null && plot.getParent() instanceof XYPlot) { XYPlot pp = ((XYPlot) plot.getParent()); domainAxis = pp.getDomainAxis(); domainAxisEdge = pp.getDomainAxisEdge(); } if (rangeAxis == null && plot.getParent() != null && plot.getParent() instanceof XYPlot) { XYPlot pp = ((XYPlot) plot.getParent()); rangeAxis = pp.getRangeAxis(); rangeAxisEdge = pp.getRangeAxisEdge(); } if (domainAxis != null) cx = domainAxis.java2DToValue(p.getX(), dataArea, domainAxisEdge); if (rangeAxis != null) cy = rangeAxis.java2DToValue(p.getY(), dataArea, rangeAxisEdge); } else { throw new Exception("no xyplot found"); } return new Point2D.Double(cx, cy); }
From source file:ec.util.chart.swing.Charts.java
@Nullable public static LegendItemEntity getSeriesForPoint(@Nonnull Point pt, @Nonnull ChartPanel cp) { final double chartX; final double chartY; final Rectangle2D plotArea; final XYPlot plot; {/*from ww w .j av a 2s . c om*/ // Let's find the X and Y values of the clicked point Point2D p = cp.translateScreenToJava2D(pt); chartX = p.getX(); chartY = p.getY(); // Let's find plotArea and plot XYPlot tmpPlot = cp.getChart().getXYPlot(); PlotRenderingInfo plotInfo = cp.getChartRenderingInfo().getPlotInfo(); if (tmpPlot instanceof CombinedDomainXYPlot) { int subplotIndex = plotInfo.getSubplotIndex(p); if (subplotIndex == -1) { return null; } plotArea = plotInfo.getSubplotInfo(subplotIndex).getDataArea(); plot = ((CombinedDomainXYPlot) tmpPlot).findSubplot(plotInfo, p); } else { plotArea = plotInfo.getDataArea(); plot = tmpPlot; } } // Let's avoid unnecessary computation final ValueAxis domainAxis = plot.getDomainAxis(); final ValueAxis rangeAxis = plot.getRangeAxis(); final RectangleEdge domainAxisEdge = plot.getDomainAxisEdge(); final RectangleEdge rangeAxisEdge = plot.getRangeAxisEdge(); final double x = domainAxis.java2DToValue(chartX, plotArea, domainAxisEdge); final double sensitivity = TOL; double distanceClickSeries = TOL + 1; Entry<XYDataset, Comparable> result = null; // For each series in each datasets for (XYDataset dataset : asDatasetList(plot)) { for (int series = 0; series < dataset.getSeriesCount(); series++) { // Index of the closest data item of the current series just left to the click int lp = getNearestLeftPoint(x, 0, dataset.getItemCount(series) - 1, series, dataset); try { // X and Y values of data items to the left and to the right double leftX = dataset.getXValue(series, lp); double leftY = dataset.getYValue(series, lp); double rightX = dataset.getXValue(series, lp + 1); double rightY = dataset.getYValue(series, lp + 1); double lx = domainAxis.valueToJava2D(leftX, plotArea, domainAxisEdge); double ly = rangeAxis.valueToJava2D(leftY, plotArea, rangeAxisEdge); double rx = domainAxis.valueToJava2D(rightX, plotArea, domainAxisEdge); double ry = rangeAxis.valueToJava2D(rightY, plotArea, rangeAxisEdge); // Distance to left point double distL = Point2D.distance(lx, ly, chartX, chartY); // Distance to right point double distR = Point2D.distance(rx, ry, chartX, chartY); // Average of both distances double distLRavg = (distL + distR) / 2d; // Distance to the segment between L and R //double distSeg = Line2D.ptSegDist(leftX, leftY, rightX, rightY, chartX, chartY); double distSeg = ptSegDist(lx, ly, rx, ry, chartX, chartY); // With a line renderer, this is probably a bit of overkill as // distSeg would be enough, but it becomes more reliable to check all these // if using splines double tmp = Math.min(Math.min(distSeg, Math.min(distL, distR)), distLRavg); // Are we closer than the previous series? if (tmp < sensitivity && tmp < distanceClickSeries) { distanceClickSeries = tmp; result = new SimpleEntry<>(dataset, dataset.getSeriesKey(series)); } } catch (Exception ex) { /* * An exception might happen when some series have less data * than others, catching the the exception here will simply rule * them out from the detection on this click */ } } } return result != null ? createFakeLegendItemEntity(result.getKey(), result.getValue()) : null; }
From source file:net.bioclipse.model.ScatterPlotMouseHandler.java
public void mouseClicked(MouseEvent me) { Point2D p = null;//w w w . j a va 2s . co m ChartDescriptor cd = null; int[] indices = null; JFreeChart selectedChart = null; ChartPanel chartPanel = getChartPanel(me); p = chartPanel.translateScreenToJava2D(new Point(me.getX(), me.getY())); selectedChart = chartPanel.getChart(); cd = ChartUtils.getChartDescriptor(selectedChart); indices = cd.getSourceIndices(); XYPlot plot = (XYPlot) chartPanel.getChart().getPlot(); XYItemRenderer plotRenderer = plot.getRenderer(); if (!(plotRenderer instanceof ScatterPlotRenderer)) { throw new IllegalStateException( "Charts using ScatterPlotMouseHandler must use ScatterPlotRenderer as their renderer"); } renderer = (ScatterPlotRenderer) plot.getRenderer(); // now convert the Java2D coordinate to axis coordinates... Number xx = getDomainX(chartPanel, plot, p); Number yy = getRangeY(chartPanel, plot, p); //Find the selected point in the dataset //If shift is down, save old selections if (!me.isShiftDown() || currentSelection == null) { currentSelection = new ChartSelection(); } for (int j = 0; j < plot.getDataset().getItemCount(plot.getDataset().getSeriesCount() - 1); j++) { for (int i = 0; i < plot.getDataset().getSeriesCount(); i++) { Number xK = plot.getDataset().getX(i, j); Number yK = plot.getDataset().getY(i, j); Number xKCheck = xK.doubleValue() - xx.doubleValue(); Number yKCheck = yK.doubleValue() - yy.doubleValue(); Number xxCheck = xKCheck.doubleValue() * xKCheck.doubleValue(); Number yyCheck = yKCheck.doubleValue() * yKCheck.doubleValue(); //Check distance from click and point, don't want to mark points that are too far from the click if (Math.sqrt(xxCheck.doubleValue()) <= 0.1 && Math.sqrt(yyCheck.doubleValue()) <= 0.1) { //Create a new selection PlotPointData cp = new PlotPointData(indices[j], cd.getXLabel(), cd.getYLabel()); cp.setDataPoint(j, i); currentSelection.addPoint(cp); if (!me.isShiftDown()) renderer.clearMarkedPoints(); renderer.addMarkedPoint(j, i); selectedChart.plotChanged(new PlotChangeEvent(plot)); } } } currentSelection.setDescriptor(cd); ChartUtils.updateSelection(currentSelection); }