[news.eclipse.platform.swt] Re: How to make Canvas selectable?

["Carolyn MacLeod" <Carolyn_MacLeod@xxxxxxxxxx>]

In your mouse listener, you can call notifyListeners (SWT.Selection, new 
Event()) to send the selection event to anyone who has added it to your 
"button".
You will also want to:
- add a key listener and if the event character is a space ' ' then call 
notifyListeners
- add a traverse listener and if the event detail is SWT.TRAVERSE_TAB_NEXT 
or _PREVIOUS, set the event doit to true
- you may also want to handle TRAVERSE_RETURN if you want your "button" to 
process carriage returns (i.e. if it can be the "default button" in a 
dialog, for example)
- you may also want to handle TRAVERSE_MNEMONIC if you want your "button" to 
handle mnemonic key selection (Alt+character)
- add a paint listener to do the drawing using the GC contained in the paint 
event. One (good) way to show that your "button" has focus is to use 
event.gc.drawFocus() on the client area of the canvas (only if the canvas 
isFocusControl() ), after you have drawn the rest of your button. This draws 
the platform's focus indicator (i.e. dotted rectangle).
- add a focus listener and redraw() the canvas when focus is gained or lost

Hope this helps,
Carolyn

"Robert B" <oh1226@xxxxxxxxxxx> wrote in message 
news:fr5g3r$qcd$1@xxxxxxxxxxxxxxxxxxxx
>
> "Jan" <ahanys@xxxxxxxxx> wrote in message 
> news:fr59kc$c4a$1@xxxxxxxxxxxxxxxxxxxx
>> Hello,
>>
>> I have a question how to extend a Canvas so it can be selected like a 
>> Button?
>
> Just add a mouse listener and process when mouseClicked()
> or mouseReleased().
>
> You can draw whatever shape you want in the canvas,
> an attractive person!
>
> R.
>