/**
* Handle the case where a plot implements the {@link Zoomable} interface.
*
* @param zoomable the zoomable plot.
* @param e the mouse wheel event.
*/
private void handleZoomable(Zoomable zoomable, MouseWheelEvent e) {
// don't zoom unless the mouse pointer is in the plot's data area
ChartRenderingInfo info = this.chartPanel.getChartRenderingInfo();
PlotRenderingInfo pinfo = info.getPlotInfo();
Point2D p = this.chartPanel.translateScreenToJava2D(e.getPoint());
if (!pinfo.getDataArea().contains(p)) {
return;
}
Plot plot = (Plot) zoomable;
// do not notify while zooming each axis
boolean notifyState = plot.isNotify();
plot.setNotify(false);
int clicks = e.getWheelRotation();
double zf = 1.0 + this.zoomFactor;
if (clicks < 0) {
zf = 1.0 / zf;
}
if (chartPanel.isDomainZoomable()) {
zoomable.zoomDomainAxes(zf, pinfo, p, true);
}
if (chartPanel.isRangeZoomable()) {
zoomable.zoomRangeAxes(zf, pinfo, p, true);
}
plot.setNotify(notifyState); // this generates the change event too
}
/**
* Returns the data area (the area inside the axes) for the plot or subplot.
*
* @param point the selection point (for subplot selection).
* @return The data area.
*/
public Rectangle2D findDataArea(Point2D point) {
PlotRenderingInfo plotInfo = this.info.getPlotInfo();
Rectangle2D result;
if (plotInfo.getSubplotCount() == 0) {
result = plotInfo.getDataArea();
} else {
int subplotIndex = plotInfo.getSubplotIndex(point);
if (subplotIndex == -1) {
return null;
}
result = plotInfo.getSubplotInfo(subplotIndex).getDataArea();
}
return result;
}