[SOLVED] Lazarus Show/Hide multiple frames from a form

[jex]

Hello,

Started to learn pascal/lazarus and I'm struggling to create a form that has buttons and for each button it shows a specific frame.
I've seen and used the example code from the wiki but it's creating problems for me:

1. When switching between frames, unhandled exception shows that 'frame1 already exists', and sometimes shows error SIGSEGV. I've made several attempts and searched but no help.
2. I reached a somewhat working stage but unwanted behavior appears: say Frame1 is already showing, when i click the button that shows it, it reloads, how to avoid that?
3. I don't want to Free a frame to show the other or FreeAndNil everything, is there a way to just Show/Hide each frame? or is that a bad practice and can lead to memory leaks?

I've attached a sample project of what I'm trying to do. Any help is greatly appreciated

[eljo]

Code: Pascal  [Select][+][-]

1. procedure TForm1.Button1Click(Sender: TObject);
2. begin
3.   if Assigned(Frame) then begin
4.     Frame.Free;
5.   end;
6.   Frame := TFrame1.Create(Panel1);
7.   Frame.Parent := Panel1;
8. end;
9.  
10. procedure TForm1.Button2Click(Sender: TObject);
11. begin
12.   if Assigned(Frame) then begin
13.     Frame.Free;
14.   end;
15.   Frame := TFrame2.Create(Panel1);
16.   Frame.Parent := Panel1;
17. end;
18.  
19. procedure TForm1.Button3Click(Sender: TObject);
20. begin
21.   if Assigned(Frame) then begin
22.     Frame.Free;
23.   end;
24.   Frame := TFrame3.Create(Panel1);
25.   Frame.Parent := Panel1;
26. end;
27.  

[jex]

eljo, many thanks! that works perfectly.