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

["Jan" <ahanys@xxxxxxxxx>]

Hi,

thank you for very nice explanation.

BR,
Jan

"Carolyn MacLeod" <Carolyn_MacLeod@xxxxxxxxxx> pí¹e v diskusním pøíspìvku 
news:fr6lhr$dso$1@xxxxxxxxxxxxxxxxxxxx
> In your mouse listener, you can call notifyListeners (SWT.Selection, new 
> Event()) to send the selection event to anyone who has added it to your 
> "button".
> You will also want to:
> - add a key listener and if the event character is a space ' ' then call 
> notifyListeners
> - add a traverse listener and if the event detail is SWT.TRAVERSE_TAB_NEXT 
> or _PREVIOUS, set the event doit to true
> - you may also want to handle TRAVERSE_RETURN if you want your "button" to 
> process carriage returns (i.e. if it can be the "default button" in a 
> dialog, for example)
> - you may also want to handle TRAVERSE_MNEMONIC if you want your "button" 
> to handle mnemonic key selection (Alt+character)
> - add a paint listener to do the drawing using the GC contained in the 
> paint event. One (good) way to show that your "button" has focus is to use 
> event.gc.drawFocus() on the client area of the canvas (only if the canvas 
> isFocusControl() ), after you have drawn the rest of your button. This 
> draws the platform's focus indicator (i.e. dotted rectangle).
> - add a focus listener and redraw() the canvas when focus is gained or 
> lost
>
> Hope this helps,
> Carolyn
>
> "Robert B" <oh1226@xxxxxxxxxxx> wrote in message 
> news:fr5g3r$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.
>>
>
>