[Solved] Line drawn is immediately deleted

[nikel]

Hello, I'm trying to draw a line under my radio button. I couldn't make it work. To test, when I draw a line and set the it's parent to form, and run it, the line is immediately deleted. Here's my code so far:

Code: Pascal  [Select][+][-]

1. FPanels[I].Canvas.Pen.Color:=clWhite;
2. FPanels[I].Canvas.Pen.Width:=3;
3. FPanels[I].Canvas.Line(0, 23, 25, 23);

How can I draw a line under my radio button?

[cdbc]

Hi
I told you already!!!
Use the 'OnPaint' event of the 'TPanel' it's concerning, otherwise the painting won't stay!
Hrmpf - /b

edit: Your job is to find a way, to make all the panels use the same event-handler... So you don't need 100 different, but equivalent OnPaint-handlers...

[VisualLab]

I'm not sure if you mean a window with several panels on which radio buttons are placed, but it can be done as in the screenshot. I'm attaching a project made in Lazarus. Of course, what I gave in the example is just one way to solve the task.