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Re^6: Question about embedded Tk::Canvas

by emilbarton (Scribe)
on Nov 20, 2013 at 14:39 UTC ( #1063585=note: print w/replies, xml ) Need Help??

in reply to Re^5: Question about embedded Tk::Canvas
in thread Question about embedded Tk::Canvas

Ok, it seems quite a bit of a modification on my script. I don't understand why retrieving a reference aftewards should disturb but I'll apply this solution.

Thank you very much for your help.
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Re^7: Question about embedded Tk::Canvas
by kschwab (Priest) on Nov 20, 2013 at 14:54 UTC
    Looking at your code on github, it's because of this:
    my $canvas = $Mainwin->Scrolled('Canvas')->grid; my $real = $canvas->Subwidget("canvas");
    Based on your choice of the variable name $real, you seem to already know what the issue is here :) $canvas isn't a 'Canvas'.
      Hey, I always wondered was real meant in this way.. I think I just copied from TextUndo tricks I had to use somewhere else. Maybe it's not of any use here.
      No I'm sorry, removing this workaround doesn't change anything, and I'll have to try your first proposal... In the meantime I found where this comes from: I had experienced key-binding problems in Scrolled TextUndo widgets and could apply with success Zentara's tip given here Re^3: Tk hidden binding, so to be on the safe side, as my canvas is scrolled too, I just applied the same here in prevision of possible key-bindings and problems. Anyway, I must acknowledge I often copy and paste bits of code without always being sure they're appropriate, when it works no further verification is made (shame on me!).

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