I wrote:
Firstly, when run under Wayland the application has a size slightly greater than its natural size. That is, I am able to reduce its size manually. Under X11 the application appears at its natural size and can only be made bigger manually.
I've looked into this further, new program attached. It appears that under Wayland the natural size of the widget (determined by gtk_widget_get_preferred_size) is 52 pixels larger than under X11: $ ./tester window default size -1 -1 widget min size 802 652 widget natural size 802 652 $ GDK_BACKEND=x11 ./tester window default size -1 -1 widget min size 750 600 widget natural size 750 600 Under Wayland the window is larger when realised but it can be reduced manually to the same size as under X11. Adding an argument to the command changes the default size of the window by calling: gtk_window_set_default_size(GTK_WINDOW(shell), 0, 0); This reports: $ ./tester bodge window default size 1 1 widget min size 802 652 widget natural size 802 652 $ GDK_BACKEND=x11 ./tester bodge window default size 1 1 widget min size 750 600 widget natural size 750 600 The natural sizes are unchanged but, surprisingly, in Wayland the window is now realised at the same size as in X11. Ron
Attachment:
tester2.c
Description: Text document