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Listener For Mouse Over On Chart Element #520

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Listener For Mouse Over On Chart Element #520

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16 changes: 16 additions & 0 deletions xchart/src/main/java/org/knowm/xchart/internal/chartpart/ToolTips.java
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Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,7 @@ public void mouseDragged(MouseEvent e) {
// ignore
}


@Override
public void mouseMoved(MouseEvent e) {

Expand Down Expand Up @@ -89,6 +90,21 @@ else if (dataPoint != null) {
dataPoint = null;
e.getComponent().repaint(); // repaint the entire XChartPanel
}

/*This loop checks the X position of the mouse in the chart, and runs through
* the datapoints to determine if the user is hovering over anything. If so,
* a datapoints information can be displayed however a user sees fit.
* This could be built on in the future with a custom UI for the info
*
* chart.getStyler().setToolTipsEnabled(true); must be enabled in your chart. */
for (DataPoint dataPoint : dataPointList) {
Integer result = Integer.compare((int) dataPoint.x, e.getX());
if (result == 0) {
System.out.println(dataPoint.label);
//This is an execution point for when the mouse is over a datapoint.
}
}

}

void prepare(Graphics2D g) {
Expand Down