Drawing non-rectangular buttons?

[David Faure]

On Tuesday 23 September 2003 23:22, shaheed wrote:
> 
> Hi all,
> 
> Is it possible without major effort to draw non-rectangular buttons in KDE/Qt? 
> Specifically, I want to draw something that approximates a normal keyboard 
> button, in particular odd-shaped stuff like L-shaped "enter" keys.
> 
> I am aware of QWidget::setMask(), but if I understand correctly, it is a bit 
> of a blunt instrument, and it is not clear to me if it would allow, for 
> example, another button to intrude into the angle of the L-shaped "enter" key 
> as on a real keyboard.

Sounds like a question for qt-interest, but here we go:
You want to use setMask (preferrably with a simple hand-assembled QRegion 
than with a QBitmap, for performance reasons). Then you can definitely put
a widget 'on top' of that one, i.e. partially overlapping its rectangular area.
(Obviously you'll have to do your own position to do that, a layout won't do).
And if you want clicks to go to the right button, you'll have to reimplement
QButton::hitButton() (which says yes for the whole rectangle by default).

-- 
David Faure -- faure at kde.org, dfaure at klaralvdalens-datakonsult.se
Qt/KDE/KOffice developer
Klarälvdalens Datakonsult AB, Platform-independent software solutions