[josm-dev] MapMode - MouseWheelListener and KeyListener?

[Paul Hartmann]

On 09/19/2012 03:55 PM, Russell Edwards wrote:
> Hello,
>
> Apologies for asking a beginner's question.
>
> I am writing a plugin which has its own MapMode. I need to catch mouse
> wheel and key press events. How can I do this?
>
> I have tried
>
> ... extends MapMode implements MouseWheelListener, KeyListener
>
> ... enterMode() {
> ...
>          Main.map.mapView.addMouseWheelListener(this);
>          Main.map.mapView.addKeyListener(this);
>   ...
> }
>
> but the listeners never seem to get called. Moreover the map still zooms
> in and out when the wheel is moved.
>
> Thanks in advance for your help and patience,

I put your code in SelectAction and MouseWheelListener worked directly.
Not sure if you can easily suppress zoom, though. What is your mapmode 
about?

Other plugins have a similar similar setup, e.g. alignways has a mapmode 
with MouseListener. In order to catch keystrokes, you should try 
AWTEventListener.

Paul




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