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MouseWheel Events [message #456648]

Mon, 06 June 2005 14:27

Omry Yadan

Messages: 45
Registered: July 2009

Member

how can I canvas listen to mouse wheel events?

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Re: MouseWheel Events [message #456693 is a reply to message #456648]

Tue, 07 June 2005 07:04

Omry Yadan

Messages: 45
Registered: July 2009

Member

Omry Yadan wrote:
> how can I canvas listen to mouse wheel events?

Figured it out.
addListener(SWT.MouseWheel, new Listener()
{
public void handleEvent(Event event)
{
int c = event.count;
c = (int) Math.ceil(c / 3.0f);
while (c < 0)
{
scrollDown();
c++;
}

while (c > 0)
{
scrollUp();
c--;
}

}
});

This works only if the Canvas has keyboard focus, so this is also needed:

addMouseTrackListener(new MouseTrackAdapter()
{

public void mouseEnter(MouseEvent e)
{
forceFocus();
}
});

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