Hello all,

it's the first time I am trying something with Linux and GTK2 and these two things do not work at all:
1.

  PostMessage(currentEdit.Handle, LM_CHAR, Ord('a'), 0); // trying to

post msg to some TEdit

2.
  UTF8Key := 'a';
  currentEdit.IntfUTF8KeyPress(UTF8Key, 1, false);

Should these code snippets do something, or it is OK that they have no effect? I am using FPC 2.5.1 [2010/06/09] and todays SVN Lazarus on Ubuntu 9.X .

Regards
?ilvinas

Well, at least they don't emulate key presses if you needed that but they must call the appropriate handlers in the edit component.

Best regards,
Paul Ishenin.

Yes, I needed some kind of emulation :) and I expected it would be so as the message queue is "emulated".
Thanks for answer. I'll try to investigate other possibilities. Or maybe someone can point me to the right direction?

Thanks
?ilvinas

By the way, none of KeyPress() KeyUp() dUTF8KeyPress() hanlers are called when PostMessage(currentEdit.Handle, LM_CHAR, Ord('a'), 0); is sent. Is this intended behaviour?

Regards
?ilvinas

Yes. LM_CHAR normally triggers OnKeyPress, but TCustomEdit eats that.

Mattias

?ilvinas Ledas wrote

PostMessage(currentEdit.Handle, LM_CHAR, Ord('a'), 0); // trying to post msg to some TEdit

AFAIK, Controls that react on messages is a windows specific way to manage controls.

In Linux, messages can be used to have a thread notify the main thread (that receives the message via the "procedure ...message" construct, but not for managing controls or to send messages to other processes.

-Michael

Yes, thanks, I understand that. I just was HOPING it will do what I want :) I have some kind of "virtual keyboard" but it is only for my own app (it does send "keys" to 3 TEdit's), so I was hoping such PostMessage() will work as I expect. As it is not - I will manage to go without it.

Regards
?ilvinas

?ilvinas Ledas wrote

Yes, thanks, I understand that. I just was HOPING it will do what I want :) I have some kind of "virtual keyboard" but it is only for my own app (it does send "keys" to 3 TEdit's), so I was hoping such PostMessage() will work as I expect. As it is not - I will manage to go without it.

During the last year I already heard 3 times about virtual keyboards in Lazarus applications. All the 3 times developers are trying to emulate the real keyboard event. There is no cross-platform way to do this in Lazarus. I know some devels found the way to emulate keyboard events in linux but personaly I would probably choose to manage the controls content in the program instead if there are not too much different control types.

Best regards,
Paul Ishenin.

Ok, thanks for info.
I solved (at least partly now) this issue just as you proposed - I am manupulating content directly.

Thanks for your opinion
?ilvinas