Re: gtkdrawing x gtkpixmap

["Gustavo J. A. M. " Carneiro <gjc inescporto pt>]

On Qua, 2003-03-12 at 01:30, Brandon wrote:
> I'm glad you asked this question. I've asked similar questions at least
> 2 times and never got any help on it. ALl I want to do is draw points
> onto a drawing area without relying on widget events occurring first
> (ie. not relying on signal callbacks that contain drawing functions) and
> no one seems to want to respond. Maybe you will have better luck.

  No one seems to respond because it is not possible :-)

  To do as you want you would need a new widget, a simplified version of
GtkDrawingArea.

  If all you want is to draw points, a possible approach would be:
        1. Create a GdkPixbuf;
        2. Create a GtkImage, instructing it to use the pixbuf you created, but
you keep your own reference to the pixbuf;
        3. Draw directly to the pixbuf;
        4. Each time you draw into the pixbuf, instruct the widget to update
itself, with gtk_widget_queue_draw(image).

  I think this should work in theory...

> Samir Bonho wrote:
> > Hi folks ,
> >
> > I read almost everything about GTKDrawing and GTKPixmap. I compiled an
> > example (scribble-simple) to understand this functions.For my life in
> > earth  be peacefull I need to know :
> >
> > What is the biggest difference of a Drawing area and a Pixmap ???
> > I draw stuff in the pixmap or in the drawing area ????
> > For example : I want to draw a point. I set all events that I want. But
> > this events has to belong to a DrawingArea or to the Pixmap ??
> >
> > Thanks for your patience...
> >
> > Samir "the dumbiest man ever" Bonho
> >
> >
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-- 
Gustavo João Alves Marques Carneiro
<gjc inescporto pt> <gustavo users sourceforge net>