canvas, movable objects, selection

[Michael T. <myso77 seznam cz>]

Hi,
 I need to create a "canvas" within a window. 2D square.
On this canvas I want to be able to place objects - circles, squares (possibly small jpeg files).
I also want to be able to select these objects with a standard mouse selection method (multiple objects at 
once).
What's the best way to do this with gtk+?

Thanks in advance for your direction.

Michael