[Lazarus] Getting X Window handle ?

[Michael Van Canneyt]

On Mon, 5 Nov 2012, zeljko wrote:

> On Monday 05 of November 2012 10:35:45 Michael Van Canneyt wrote:
>> Hello,
>>
>> I'm trying to embed the VLC player (using the videolan DLLS) in a LCL
>> application. On Windows, this works fine. On Linux, this does not work.
>>
>> The reason is that the VideoLan library expects the native window handle.
>> On Windows, TWinControl.Handle provides this.
>>
>> On Linux, TWinControl.Handle returns the GTK widget pointer if I'm using
>> GTK. (I imagine it will be something similar when using Qt)
>>
>> How can I get access to the low-level X window handle (id) of a TWinControl
>> on Linux ?
>
> It's not so problematic. Look at qtx11.inc in lcl/widgetset/qt or in
> gtk2widgetset.inc (there's IFDEF X11 or similar) which gets X11 TWindow from
> GdkWindow.

Actually, it is in gtk2proc, FormToX11Window :-)

Thanks.

The function could accept a TWinControl instead of TCustomForm I would think.
Maybe an overloaded version can be added. The code is the same.

I'd even suggest adding a GetNativeHandle : Pointer to TWinControl, 
but I suspect that will encounter some resistance :-)

Michael.