40 lines
1.1 KiB
Raku
40 lines
1.1 KiB
Raku
#!/usr/bin/perl
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# Overwrite a bunch of randomly chosen windows on the screen with
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# random-colored rectangles. You might want to learn about the
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# "xrefresh" program before trying this one.
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# Demonstrates the use of "robust_req"
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use X11::Protocol;
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$X = X11::Protocol->new;
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my $gc = $X->new_rsrc;
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$X->req('CreateGC', $gc, $X->root);
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for (1 .. 2500) {
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my $client = rand(50);
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my $client_id = rand(200);
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my $id = $client << 21 | $client_id;
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printf "XID %x ", $id;
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my($result,) = $X->robust_req('GetGeometry', $id);
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my %geom;
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if (ref $result) {
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print "exists\n";
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%geom = @$result;
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} else {
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print "does not exist\n";
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next;
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}
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# Make sure we've got a Window rather than a Pixmap, since overwriting
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# Pixmaps is more permanent and therefore less amusing.
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next unless ref $X->robust_req('GetWindowAttributes', $id);
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$X->req('ChangeGC', $gc, 'foreground' => rand(2**32));
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my($result,) = $X->robust_req('PolyFillRectangle', $id, $gc,
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[5, 5, $geom{width}-10, $geom{height}-10]);
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if (not ref $result) {
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print "Ignoring $result error\n";
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}
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}
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