GnomeCanvas

["Chris Garrett" <garrett91 hotmail com>]

Hi,

I am coding a program using GTK2.0.  Up until now, I have been using a 
GtkDrawingArea, with a pixbuf on it.

I am considering changing to the use of a GnomeCanvas, since it appears to 
allow relatively easy scaling.  I have the API reference, but it does not 
really explain how the whole thing hangs together.  Can I do the following?

1. Display a GdkPixbuf on a GnomeCanvas, whilst still retaining the ability 
to poke directly at the pixel data within the pixbuf.

2. Zoom the canvas with gnome_canvas_set_pixels_per_unit(), and see the 
pixbuf on the canvas scale as a result (This would simply scale the rendered 
view of the pixbuf.  The pixbuf data itself would be unchanged)

I would also like to know how to actually add a pixbuf to the gnomecanvas in 
the first place.  For instance, do I have to use a GnomeCanvasGroup? Is 
there a code sample I can look at or a tutorial for the GTK2.0 GnomeCanvas I 
can follow?  The scribble app in the GTK tutorial uses the drawing area.

Alternatively, if anyone can tell me how to scale a drawingarea and its 
contents I can stick with my current code base.  I cant see anything about 
this in the drawingarea documentation.

Best regards,

Chris.

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