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Work around zoom issues on Linux. #22

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Work around zoom issues on Linux. #22

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6 changes: 5 additions & 1 deletion src/main/java/org/jfree/chart/fx/interaction/ScrollHandlerFX.java
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Original file line number Diff line number Diff line change
Expand Up @@ -113,6 +113,11 @@ private void handleZoomable(ChartCanvas canvas, Zoomable zoomable,
if (canvas.getChart() == null) {
return;
}
int clicks = (int) e.getDeltaY();
if (clicks == 0) {
// don't zoom on events with no wheel movement (occurs on Linux)
return;
}
// don't zoom unless the mouse pointer is in the plot's data area
ChartRenderingInfo info = canvas.getRenderingInfo();
PlotRenderingInfo pinfo = info.getPlotInfo();
Expand All @@ -122,7 +127,6 @@ private void handleZoomable(ChartCanvas canvas, Zoomable zoomable,
// do not notify while zooming each axis
boolean notifyState = plot.isNotify();
plot.setNotify(false);
int clicks = (int) e.getDeltaY();
double zf = 1.0 + this.zoomFactor;
if (clicks < 0) {
zf = 1.0 / zf;
Expand Down