Thank you very much for your effort, guys! I've finally got it to work. Ok, it might not be 100% perfect.
To remove the "old" rectangles while moving the mouse I just draw the
rectangle again. This is working because i am using $gc->set_function
('xor') and Gtk2::Gdk::Color->new (65535, 65535, 65535). The drawn
rectangle has now the opposite color of the pixel below. When you redraw
it the color is original color again ;-)
See the attached file...
Cheers,
Mario
Am Dienstag, den 05.08.2008, 08:16 -0400 schrieb zentara:
> On Tue, 05 Aug 2008 10:06:45 +1000
> Kevin Ryde <[EMAIL PROTECTED]> wrote:
>
> >zentara <[EMAIL PROTECTED]> writes:
> >>
> >> I chopped down your model to the point where it would draw a simple
> >> rectangle, without the mouse drag. Then I added a line at a time back in,
> >> until it stopped working.
> >>
> >> The culprit is:
> >>
> >> $gc->set_function ('xor');
> >
> >Yes and no, I suspect there's no pixel values set into the gc. The RGB
> >parts of a GdkColor have no effect at the gc->set_foreground level ...
> >
> I also tried with the dragging rectangles and trying to use clear_area on
> each draw,
> to clear all the interior rectangles. But it seemed you need to adjust
> corners by + or - 1 pixel
> to compute the area to be cleared, and it didn't work right.
> But it may be possible to perfect.
screeny.pl
Description: Perl program
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