Crosshair X,Y location on Panel

[m3stevep]

Is there a way to get the X and Y values for the XYPlot's crosshair location? Read carefully before you answer.

plot.getDomainCrosshairValue() gives the value for X in the Dataset, but I'd like to know the X value on the panel to position some text relative to the crosshair location.

It'd be nice if there was a method like plot.getDomainCrosshairLocation or something like that.

If there is already something like this, I'd really love to learn about it.

Thanks in advance!!

SteveP

[david.gilbert]

The ScatterPlotDemo3.java source file contains code (in the chartMouseClicked() method) for converting from Java2D coordinates to data values, and from data values to Java2D coordinates.

[m3stevep]

Worked great! Thanks!

btw... This is how I implemented it... where mouseX & mouseY are used in the main panel.

private void evaluateScreenMouseXY(XYPlot plot, XYDataItem di) {

ChartRenderingInfo info = this.chartPanel.getChartRenderingInfo();
Rectangle2D dataArea = info.getPlotInfo().getDataArea();
ValueAxis domainAxis = plot.getDomainAxis();
ValueAxis rangeAxis = plot.getRangeAxis();

double xxx = domainAxis.valueToJava2D(di.getX().doubleValue(), dataArea, plot.getDomainAxisEdge());
double yyy = rangeAxis.valueToJava2D(di.getY().doubleValue(), dataArea, plot.getRangeAxisEdge());

Point2D p2 = this.chartPanel.translateJava2DToScreen(new Point2D.Double(xxx, yyy));
mouseX = new Double(p2.getX()).intValue();
mouseY = new Double(p2.getY()).intValue();
}