Greets. I'm trying to determine if it is possible to pop up a canvas when you press a mouse button, but do so such that the canvas has a transparent background. In other words, if the canvas has no objects on it, pressing a mouse button would have no visible effect (assuming you turned off the window decoration, too).

Why do this? I'd like to create a popup menu that used canvas objects - circles, arcs, buttons, etc. - as virtual menu buttons, such that I can set their position, color, shape, etc. as I see fit. But, I'd like the canvas background to be transparent, such that the canvas objects appear to overlay whatever was on screen before the canvas was put into place.

I'm done some digging around, and, so far as I can tell, what I'm looking for isn't possible. Can one of you learned folk (hopefully) prove me wrong about that, or perhaps suggest another way of achieving the same goal?

I thank you all in advance...

In reply to Perl/Tk and Transparent Canvases by Mikster

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.