Hi; On 20 December 2015 at 18:01, Richard Shann <rich...@rshann.plus.com> wrote: > I would like to know which of the top-level windows in my application is > on top. Is there a way of doing this? I see that
You can only see if your window has focus or contains the pointer — i.e. it's the one that the user is interacting with at this very moment. That usually implies that the window is at the top of the stack maintained by the window manager. You could also check if the "always-on-top" bit is set, but obviously that does not guarantee that the user is interacting with the window. Any other information about the window stack is maintained by the window manager itself, and you'll have to ask that component, using window manager and platform specific API, if an API is even exposed. > ------------------------------------------------------------------------ > GdkEventVisibility has been deprecated since version 3.12 and should not > be used in newly-written code. > > Modern composited windowing systems with pervasive transparency make it > impossible to track the visibility of a window reliably, so this event > can not be guaranteed to provide useful information. > ------------------------------------------------------------------------- > but is there an alternative for my (simpler) question? There is, sadly, nothing "simple" about your question. It truly depends on the platform, and on top of that, it depends on how your windows are managed. For instance, in a tiled window management policy, windows are not stacked — hence, there is no conventional "on top". Compositing window managers on X11, such as Mutter or Compiz, may re-arrange the windows as displayed to the user, even if the user cannot interact with them outside of the existing stacking order; again, "on top" is not something that can be conveyed to an API, when your windows are in "exposé" or laid out on the faces of a 3D solid. Finally, on Wayland, each surface has no knowledge of anything outside its own coordinate space; there is no way to access the windows stacking, and for all intent and purposes, your window manager may put the application's window on Mars. The only reliable way thing you can know is if the user is currently interacting with a window you're presenting, via pointer, touch, or keyboard events; either because the pointer or a finger entered the window, or because the window has key focus. GTK+ provides you with events to let you know when any of those things happens. Ciao, Emmanuele. -- https://www.bassi.io [@] ebassi [@gmail.com] _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
