> 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 ?
Derive a widget from Fl_Box to draw your graph, and have its handle method do the actual drawing etc. Set the boxtype of your derived widget to a BOX rather than a FRAME type (and certainly NOT to "NO_BOX") and then the background should be handled automatically. FL_FLAT_BOX is probably favourite for this sort of thing. Deriving from group is probably a Bad Thing here, since IIRC the default boxtype for a group is NO_BOX, which probably explains the behaviour you are seeing? Indeed, simply setting the boxtype of your group might actually help... Selex ES Ltd Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 3EL A company registered in England & Wales. Company no. 02426132 ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** _______________________________________________ fltk mailing list fltk@easysw.com http://lists.easysw.com/mailman/listinfo/fltk
