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Correct zoom direction to be analogous to Swing #9

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Correct zoom direction to be analogous to Swing #9

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8 changes: 6 additions & 2 deletions 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 @@ -30,7 +30,11 @@
* (C) Copyright 2014-2021, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
* Contributor(s): Matthias Noebl (for Cropster GmbH);
*
* Changes
* -------
* 03-Aug-2018 : Correct zoom direction to be analogous to Swing (MN);
*
*/

Expand Down Expand Up @@ -124,7 +128,7 @@ private void handleZoomable(ChartCanvas canvas, Zoomable zoomable,
plot.setNotify(false);
int clicks = (int) e.getDeltaY();
double zf = 1.0 + this.zoomFactor;
if (clicks < 0) {
if (clicks > 0) {
zf = 1.0 / zf;
}
if (canvas.isDomainZoomable()) {
Expand Down