[Lazarus] Transparent Container/Panel in LCL?
zeljko at holobit.net
Tue Sep 4 14:51:27 CEST 2012
On Monday 03 of September 2012 16:55:47 Graeme Geldenhuys wrote:
> On 03/09/12 15:19, Felipe Monteiro de Carvalho wrote:
> > Transparency is supported, just use TWinControl.SetShape(Region) or
> > SetShape(Bitmap);
> It seems some people have different definitions of "transparency". Will
> that make the TTransparentContainer clear like glass? Will I see through
> it and see the main form's tiled canvas?
> Anyway, I'm not 100% sure how to your the TRegion, so tried the
> following. Still no luck. The TTransparentContainer doesn't look
> "visually" transparent / see-thru.
> procedure TForm1.FormCreate(Sender: TObject);
> r: TRegion;
> Width := 400;
> r := TRegion.Create;
> FMyContainer := TTransparentContainer.Create(self);
> FMyContainer.Parent := self;
> with FMyContainer do
> Left := 50;
> Top := 50;
> Width := 300;
> Height := 200;
> r.AddRectangle(0, 0, FMyContainer.Width, FMyContainer.Height);
> See attached image for the results.
I don't know for gtk2 atm, but eg. under Qt QPainter have opacity property
which does thing you want. Maybe it's possible under gtk2 (by using cairo) to
do same thing.
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