Qt+Cef integration on Linux

antofik

Actually, I've managed to make it work.
Just in case, if someone will need it in future:

  GtkWidget* gtkWin = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  GtkWidget* parentView = gtk_vbox_new(FALSE, 0);
  GtkContainer* container = (GTK_CONTAINER(gtkWin));
  gtk_container_add(container, parentView);
  gtk_window_set_position(GTK_WINDOW(gtkWin), GTK_WIN_POS_CENTER);
  gtk_widget_show_all(GTK_WIDGET(gtkWin));

  GdkWindow* w = gtk_widget_get_window(parentView);
  XID t = gdk_x11_drawable_get_xid(w);

  WId wid = (WId) t;
  QWindow* win = QWindow::fromWinId(wid);
  setLayout(new QGridLayout());
  QWidget* widget = QWidget::createWindowContainer(win);
  this->layout()->addWidget(widget);

  info.SetAsChild(parentView);

Basically, I've created my own GTK window, passed the reference on this window to CEF, and placed it into Qt widget using QWindow::fromWinId().

mrjj

So would it be fair to conclude that it really
wants a gtk windows handle and not what ever comes out of
winId() ?

antofik

Yes @mrjj, Cef is built on Gtk2, so it requires gtk handle, not the winId().

Anyhow, it is possible to integrate Cef with Qt on linux, and that is what matters :-)

gepgep

is there somewhere a more complete example of mixing qt/gtk/cef?

mrjj

@gepgep
Not that i have stumbled upon.
Have you asked on the forum ?
http://magpcss.org/ceforum/

You cannot use http://doc.qt.io/qt-5/qtwebengine-index.html
or webkit ?

gepgep

@mrjj i am wondering if it can be done with cef due to (my) project restrictions ..
I have found several git repos with qt+cef, but only for windows. Also i managed to combine gtk with cef successfully, but i cant find anything about qt+cef@linux (maybe because qt+gtk is not a happy combination?). The code snippet from @antofik does not build (gtkwidget with qwidget is it even possible) or i am missing something?

mrjj

@gepgep
Well mixing Gtk and Qt is pretty rare use case as far as I know. Both being Widgets libraries.
And there is always the issue of the event loop.
So as far as integration it will not be funny.

@antofik sample wraps a gtk window using native Gtk calls +Qt and is apparently supported by
createWindowContainer so in this case it works.

I have not seen much info about this. sorry.

gepgep

@mrjj thanks for your time+replies

mrjj

@gepgep
Hi
Just as a note.
Webkit been revived
https://forum.qt.io/topic/76739/webkit-status-2017

So you might be able to use that?

Tomato Page

@antofik
Dear antofix,
Could you send me a complete example. I'm try the method but still not working with qt 5.5

thanks