[Lazarus] Transparent Container/Panel in LCL?

Graeme Geldenhuys graeme at geldenhuys.co.uk
Mon Sep 3 16:55:47 CEST 2012

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.

   - Graeme -

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