Christian Budde wrote:
Ok, just for the records: I tried to do it with
TWinForm.CreateParented(ParentWindow: hwnd), but I get an access
violation. So that does not work.
I think ParentWindow is very widgetset specific (see below). Probably
it will work cross platform very limited.
Ok, thanks for the information. I'm willing to find a cross platform
solution, so I don't necessary need to go that ParentWindow road.
Solution:
It is probably easier to create a wrapper TWinControl / TCustomForm
with the ability to use the foreign Handle.
I just had a look at the wincontrol.inc and I already found this:
{------------------------------------------------------------------------------
TWinControl CreateParentedControl
------------------------------------------------------------------------------}
class function TWinControl.CreateParentedControl(ParentWindow: hwnd):
TWinControl;
begin
// ToDo
Result:=nil;
end;
Is this what you thought of? I mean it's still pretty "ToDo", but I
guess the structure is already there. Now all I need to do is fill it
with live. Any ideas?
The main reason it exists is delphi compatebility. Using this function
instead of using windows.SetParent has the advantage that the VCL/LCL
knows that the parent is not a VCL/LCL control so it can do special things.
I think on win32 for sure and on X or OSX it is doable. However I think
it will take loads of time to debug the LCL prevent it to assume that a
parent always is a LCL control. And the result will always have less
functionality that when it has a real LCL parent. Even in delphi this is
the case.
So it is a lot of effort for something with limited functionality and
limited use. I rather spend my time on other things.
Marc
Christian
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