Yes. It's possible, but it's a lot of work. Here's an example of a transparent window with a cyan-colored circle by zentara
. Reverse it and see what you can come up with.
my $width = 100;
my $height = 100;
my $mw = MainWindow->new(-background => 'cyan' );
my $zinc = $mw->Zinc(-width => $width,
-height => $height,
-reshape => 1, #clips zinc
-fullreshape => 1, #clips $mw and xterm
-backcolor => 'blue',
my $petal = $zinc->add('curve',1,[[$width/2,0],
-tags => ['bezier1'],
-filled => 1,
#-fillcolor => 'cyan',
#attempt at semi-transparency
-fillcolor => "=radial 0 0 |yellow;40|black;40 50|cyan;40",
-closed => 1,
-linewidth => 0,
-priority => 1,
-visible => 1,
# using the triangulaire curve to reshape both TkZinc and Mainwindow w
$zinc->itemconfigure(1, -clip => $petal);
See Re: Perl TK
window transparency / opacity
for more information.
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