Oh, and note I changed the lines that record the x/y event positions
by subtracting the canvas's x() and y() values.
The global events returned by Fl::event_x()/y() are relative to the
upper left corner of the parent /window/. So to get them to be relative
to the canvas widget (the Fl_Box), you have to subtract off the x() and
y()
positions of the canvas.
So specifically, the code that was changed:
BEFORE:
case FL_PUSH:
XC = Fl::event_x();
YC = Fl::event_y();
AFTER:
case FL_PUSH:
XC = Fl::event_x() - x(); // show events relative to canvas's
coords
YC = Fl::event_y() - y(); // "" ""
_______________________________________________
fltk mailing list
[email protected]
http://lists.easysw.com/mailman/listinfo/fltk
