[pygtk] Drawing over a scrolled image

[A.T.Hofkamp]

Fabrice Delente wrote:

> I wasn't specific enough: when I say image, it's in fact a PNG file; I load it in a gtk.Image with load_from_file, and I didn't find any method in gtk.DrawingArea to display a pixbuf (as gtk.Image contains a pixbuf).

Note the first two sentences in the PyGTK DrawingArea reference documentation:

"The gtk.DrawingArea widget is used for creating custom user interface 
elements. It's essentially a blank widget containing a gtk.gdk.Window that you 
can draw on. .... "

In other words, the method you are looking for is in the gtk.gdk.Drawable 
class (base class of gtk.gdk.Window) rather than the gtk.DrawingArea class, eg 
code like will display a pixbuf contained in self.pbuf:

def expose(self, area, event):
     """
     Render the picture to the screen.
     """
     if self.pbuf is None:
         return

     drawable = self.area.window
     gc = drawable.new_gc()
     drawable.draw_pixbuf(gc, self.pbuf, 0, 0, 0, 0)