Is it good idea TForm to have AfterShow event

[daniel_sap]

Hi, in my projects I often send message after main form show.
This way I can show splash form or do other activities,
like opening the files passed in ParamStr(1)

Is it good idea TForm to have AfterShow event
What do you think

[speter]

I generally set a boolean in form.create then use the form.activate event (checking the boolean to make sure the code only gets run once).

cheers
S.

[Bart]

Mostly I have an Application.QueueAsyncCall() in OnFormShow event to achieve this.

Bart

[Xenno]

PostMessage at the end of onShow is enough. Not necessary, though.

[zeljko]

PostMessage at the end of onShow is enough. Not necessary, though.

Application.QueueAsyncCall() works on all platforms and widgetsets, not sure that PostMessage works with all widgetsets.

[jcmontherock]

I found such routine:

Code: Pascal  [Select][+][-]

1. procedure TForm1.AfterShow(Sender: TObject; var Done: Boolean);
2. var
3.   Start: Double;
4. begin
5.   Start := GetTickCount64;
6.   Application.OnIdle := FOldOnIdle;                 // Restore catched OnIdle.
7.   Label1.Caption:=Format('Sleep: %.3f', [GetTickCount64-Start]);
8.   Application.ProcessMessages;
9.  
10.   Start:=GetTickCount64;
11.   Sleep(3000);  // loading data
12.   Memo1.Lines.Add(Format('Waited %f ticks', [GetTickCount64-Start]));
13.   Memo1.ScrollBy(0, Memo1.Lines.Count);
14.   Label1.Caption:=Format('Slept(%f)', [GetTickCount64-Start]);
15.   Done := True;
16. end;
17.  
18. procedure TForm1.FormShow(Sender: TObject);
19. begin
20.   FOldOnIdle := Application.OnIdle; // Save current OnIdle.
21.   Application.OnIdle:=@AfterShow;
22. end;
23.  

[cdbc]

Hi
from/@ zeljko:

not sure that PostMessage works with all widgetsets.

I would think so, as it's implemented in the LCL, so if the underlying widgetset, doesn't directly support it, the developer has to provide an implementation for it or similar...
I've just played around with fpGUI 1.5.0 and the first thing I checked was comms with multithreading and 'fpgPostMessage();' as it happens to be called in fpGUI... It works great. 
I think only winders is natively born with that exact system 
Regards Benny