Ok, ok, it's Friday, need more sleep. Simply forced redraw() of the parent solved the problem. It's a bit inefficient, because if the parent is a "big" window with many objects I have to redraw everything. Masked by redrawing only when the bargraph value changes, for now.
Any way to "invalidate" to the parent only the bargraph area ? Thanks, regards Lucio ----Messaggio originale---- Da: memoryl...@tin.it Data: 15-mar-2013 10.34 A: <email@example.com> Ogg: Bargraph object with Fl_Group Hi all, I am trying to create a simple object representing a "bargraph". It is a simple filled rectangle, derived in a Fl_Group ; the draw method simply draw two rectangles, one with "fill" color, the other with "background" color. All is ok ; now I want to add a "transparent" background option. I cannot draw the "background" rectangle, so when the rectangle is growing all is right, but when the bargraph value goes down... How can I force the erasing of the filled rectangle before redrawing it with the new dimension ? Any suggestion is welcome. Thanks all, regards Lucio Dona' _______________________________________________ fltk mailing list firstname.lastname@example.org http://lists.easysw.com/mailman/listinfo/fltk