Gdk::Toplevel or Gdk::Surface?

Applications
1

Hi, I’m migrating my application to gtkmm4, I used to have a ApplicationWindow as my main window, I am wondering if I should switch to using Gdk::Toplevel or Gdk::Surface. My app needs to be fullscreen and always toplevel.
Any reference to gtkmm4 examples? The book examples in gtkmm3 were very useful.

2

You should not use any of that.

GtkWindow has the API for being full screen. If by “top level” you mean “always on top”: window stacking order manipulations are not portable across windowing systems, so they are not available through the API. A full screen window will likely be places above all other windows by any compliant window manager.

3

So when should I use Gdk::Toplevel?

4

You shouldn’t. :slightly_smiling_face:

GdkToplevel is an API for top level surfaces managed by the window manager; it’s the result of splitting GdkSurface (formerly GdkWindow) into:

  • generic windowing system surface API
  • top level surface API
  • pop up surface API

In general, you should not be messing around with the GDK API if you already have a GtkWindow.

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