Transparent background color in TGroupBox - DELPHI

Question

How can i set transparent background color in TGroupBox?

In my Delphi's form I have a GroupBox and a Panel (graphically overlaid).
I wrote a procedure to draw a gradient fill on the Panel using Rect. It works!
Now I have another problem: GroupBox backgound color descends from the Form but I wish it was the same of Panel. I can't put GroupBox into Panel because draw procedure fill the entire Panel area (also GroupBox).
Is there a way (by code) to set trasparent background color of GroupBox?

Did you consider using FireMonkey? There you'd only have to set the `opacity` property — Wouter van Nifterick, Nov 09 '12 at 10:12
Yes, I consider it but for different reasons I decide to use a simple VCL Application. — stacker, Nov 09 '12 at 10:33
I solved setting at runtime the Parent property of the GroupBox. — stacker, Nov 09 '12 at 10:38
@stacker: If that **is** the answer than **post** it as answer and accept it. — Uli Gerhardt, Nov 09 '12 at 12:01
@stacker: Why don't you make the relationship at design-time? — Uli Gerhardt, Nov 09 '12 at 12:04
@Uli Gerhardt: If I make the relationship at design time when the draw procedure is performed the entire area of the Panel (included the GroupBox) will filled by the gradient and becomes invisible. So, at first i'm going to perform the draw procedure and then i set the Parent property of the GroupBox to Panel. — stacker, Nov 09 '12 at 13:46
@stacker - You're performing the draw procedure in OnPaint of the form, right? — Sertac Akyuz, Nov 09 '12 at 14:29

score 0 · Answer 1 · answered Nov 09 '12 at 11:00

0

set parentcolor of the groupbox to true

answered Nov 09 '12 at 11:00

Ravaut123

2,764
31
46

ParentColor property is already set to True. But as I said the parent of the GroupBox is the Form not the Panel. I solved setting at runtime the Parent property of the GroupBox. So GroupBox take the background color of Panel. – stacker Nov 09 '12 at 11:18

score 0 · Accepted Answer · answered Nov 12 '12 at 08:14

0

I solved setting at runtime the Parent property of the GroupBox.

answered Nov 12 '12 at 08:14

stacker

603
4
10
15

Transparent background color in TGroupBox - DELPHI

2 Answers2

Linked