[Gambas-user] check pixel in drawingarea

[wally]

On Tuesday, May 10, 2011 14:14:11 Benoît Minisini wrote:
> > Question on Gambas 3
> > 
> > I need to find pixelcolor from a drawingarea painted with the draw event.
> > I tried already several variants of drawingarea.grab but always fail.
> > 
> > the help for Grab is weak and typeof(drawingarea.grab) gives 13
> > (function)
> > 
> > goal is to select pixel (drawn object as lines is not possible i gues)
> > when on mouse.move over drawingarea.
> > 
> > wally
> 
> You can't, because the DrawingArea contents is stored inside the X server
> (or the graphic card). This is a X11 thing.
> 
> You have to use an intermediate Image object in memory.
> 
> Regards,


that's what i tried using grab(). no idea how this works
just a an example  line  for gb3, is highly welcome :)
thx