Embedding QWidget into X11 Window

Question

I want to embed two QWidgets into a window created using XLib. I have written this code:

// Assume all the necessary headers included

int main(int argc, char *argv[])
{
   QApplication app(argc, argv);

   // Create widget 1
   QWidget widget1 ; 
   widget1.setGeometry(44,44,666,666);
   widget1.show();

   // Create widget 2   
   QWidget widget2 ;
   widget2.setGeometry(144,144,666,666);
   widget2.show();      

   Display *display = XOpenDisplay( 0 ); // 0 parameter for default values

   if ( display != NULL )
   {
      // Create the x11 window using XLib
      Window w = XCreateWindow(display, DefaultRootWindow(display), 
      0, 0, 1200, 1100, 0,CopyFromParent, CopyFromParent, CopyFromParent, 0, 0);

      XMapWindow(display, w);
      XFlush(display);

      XReparentWindow(display, widget1.winId(), w, 0, 0);
      XReparentWindow(display, widget2.winId(), w, 1, 10);
  }

  else
      std::cout << "Error: Opening display" << std::endl ;

      return app.exec();
}

I am able to run this program successfully but these widgets are not getting embedded into the X11 window I created. All three things are getting created, but independently. These widgets are not getting embedded into the window.

Answer 1

As alternate solution, you can to use QX11EmbedWidget instead QWidget in qt application and XEmbed protocol in XLib application, such as doing this QX11EmbedContainer. This solution has a plus: you can realise different window in different processes.

Answer 2

the following would indicate that perhaps you need to think about the order of displaying the widgets so that the winId for your widgets gets set to something that can be passed to XReparentWindow .

http://www.qtforum.org/article/16529/xreparent-external-x11-application.html