JavaFX: How to make a ScrollPane pan only on middle button? -


javafx's scrollpane panes on mouse events when allowed pan: 

scrollpane.setpannable(true);

how limit scrollpane pan on middle mouse events, while still allowing events stackpane's content?

you should consume events except middle button events inside content's event handler: 

// let scrollpane.viewrect pan on middle button. imagelayer.addeventhandler(mouseevent.any, event -> {     if(event.getbutton() != mousebutton.middle) event.consume(); });

this works because scrollpane pans via event handler too, , event handlers invoked bottom-up. if consume event via child, won't scrollpane viewrect panning.


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