Method of determining overlapping canvas items

[srhoads]

I want to be able to drag items on the screen and determine if they overlap. Anybody have any ideas?

 

[ulis]

From the title of your add I suppose that your are speaking about items in a canvas.

I didn't used that, but here are some ideas:
You can get the boxing rectangle of the interesting item by the bbox subcommand:

set bbox [.canvas bbox $interesting]

Then you can ask all overlapping items:

set items [eval .canvas find overlapping $bbox]

$interesting should be in the list.

Not tried, hope this help

ulis

 

[Guest_imported]

Yes, I do want to use canvas items but they have very complex shapes such as an "L", "T", "Y", etc and I need to be very precise. Rectangular bounding boxes does not provide the required precision.