I did a small example project (in fact an enhancement of the example/messages/uasynccall.pas example in the svn).

Same lets you select to test

- TThread.Synchronize
- TThread.Queue
- PostMessage
- PostThreadMessage
- SendMessage
- TForm.Dispatch
- Application.QueuAsyncCall without parameters and
- Application.QueuAsyncCall with parameters

From
- A thread
- A timer event and
- A button event

If anybody might be inclined to put this project into the examples directory in the svn, I'd be happy to send the code.

-Michael

And where is that example project ?

zeljko

zeljko wrote

And where is that example project ?

I can send it via email, if you want to have it.

-Michael

Some testing results with Lazarus revision 29134 and fpGUI revision as of 20110120:

GTK2 fpGUI
From a Thread ======= =======
Synchronize (*) OK
PostMessage OK no function SendMessage (**) no function Dispatch (**) (***)
QueueAsyncCall (*) (****)

From a Timer
Synchronize impossible
PostMessage OK no function SendMessage OK no function Dispatch OK OK
QueueAsyncCall OK (*****)

(*) The scheduled Events only are handled in the Main Thread when GUI
Events for the Form are handled
(**)    Forbidden but eventually works, The scheduled Events only are
handled in the Main Thread when GUI Events for the Form are handled
(***)   Forbidden; works doe some time, then "SIGABRT"
(****)  The scheduled Events only are handled in the Main Thread when
the worker thread is terminated
(*****)Very funny: The scheduled Events only are handled in the Main
Thread when e.g a completely unrelated worker thread is created and then
terminated

Hope this helps,

-Michael

Hello Lazarus-List,

Thursday, January 20, 2011, 10:47:41 AM, you wrote:

MS> Some testing results with Lazarus revision 29134 and fpGUI revision as MS> of 20110120:
MS> GTK2 fpGUI MS> From a Thread ======= ======= MS> Synchronize (*) OK
MS> PostMessage OK no function MS> SendMessage (**) no function MS> Dispatch (**) (***) MS> QueueAsyncCall (*) (****) MS> From a Timer
MS> Synchronize impossible
MS> PostMessage OK no function MS> SendMessage OK no function MS> Dispatch OK OK
MS> QueueAsyncCall OK (*****)

May you send me the test in order to test PostMessage and SendMessage at least under LCLfpGUI ? As you know it is very alpha :)

Your test invironmen is Linux or Windows ?

Jos? Mejuto wrote

May you send me the test in order to test PostMessage and SendMessage at least under LCLfpGUI ?

Done

As you know it is very alpha :)

Of course I know that, so I'm trying to help to improve it. (But as you see the gtk2 Widget Type does not work perfectly, either ;) )

Your test invironmen is Linux or Windows ?

Linux, but the test program should work with Windows, as well. Here additionally, SendThreadMessage should automatically be enabled.

BTW it's an LCL-fpGUI project :).

-Michael