ControlStyle := ControlStyle - [csOpaque]; don't have effect, even in QT 2013/7/24 Vojt?ch ?ih?k : > It works for me but only in Qt. You have to set ControlStyle := ControlStyle > - [csOpaque]; in constructor. csParentBackground seems to have no effect on > it. > > In GTK2 I cannot overlay components anyway. > > > > Vojt?ch > > ______________________________________________________________ >> Od: "Fabio Luis Girardi" >> Komu: Lazarus mailing list >> Datum: 24.07.2013 21:30 >> P?edm?t: [Lazarus] Custom control >> > > Hi!! > > Somebody knows how make a custom control with background transparency > on GTK2/QT? > > My idea is that a control behind of this custom control must be > displayed (if this control is behind of a non painted area) > > > Problem example attached. > > Ideas? > > -- > The best regards, > > Fabio Luis Girardi > PascalSCADA Project > http://sourceforge.net/projects/pascalscada > http://www.pascalscada.com > > > ---------- > > -- > _______________________________________________ > Lazarus mailing list > > http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus -- The best regards, Fabio Luis Girardi PascalSCADA Project http://sourceforge.net/projects/pascalscada http://www.pascalscada.com

I see now. It works here (Qt) but only if Form.Color = clDefault. When I change Form.Color to clYellow it is transparent in design-time but not in run-time. In run-time it looks like on your screenshot. Maybe csParentBackground and csOpaque flags are not implemented for all platforms. Vojt?ch ______________________________________________________________ > Od: "Fabio Luis Girardi" > Komu: "Vojt?ch ?ih?k" > Datum: 24.07.2013 22:54 > P?edm?t: Re: [Lazarus] Custom control > ControlStyle := ControlStyle - [csOpaque]; don't have effect, even in QT