How would I get a handle to the active gtk.Window in python? (not a window I created, but the currently focused window).
2 Answers
The answer is actually not OS-specific -- you can do it within GTK. You can get a list of all the toplevel windows from the application using gtk.window_list_toplevels(), then iterate through it until you find one where window.is_active() returns True.
If you want to consider other windows than the ones from your application, then you could try gtk.gdk.screen_get_default().get_toplevel_windows() but this will only get you GDK windows and not GTK windows, because you have no way of knowing whether those GDK windows are actually associated with GTK windows.
7 Comments
user494077
This is not what I want - window.is_active() returns whether a given window is active, I need the actual window object. I have a handle to the wnck window or to the gtk.gdk.Window, but I need the gtk.Window object.
user494077
The second paragraph is exactly my problem - I have a list of gdk windows (I can also use wnck and get a similar list of wnck windows) but I need the gtk windows. My real effort is to determine what type of widget inside the window has user focus (e.g. text-edit).
ptomato
There's no way of knowing that - perhaps the focused widget is some custom widget that your program doesn't even know about! I don't think what you want is possible.
pyCthon
gtk.window_list_toplevels() returns as [] for me. I"m on Ubuntu with plenty of windows open,ptomato
Did you read the answer? That won't give you windows from other applications.
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[Note: This answers the question as the OP originally phrased it, which other readers will probably be searching for - not the very different question that they changed it to in comments on the other answer.]
If you have a GtkApplication and have added your GtkWindows to it - which you should probably do, because GtkApplication can do lots of really cool stuff! - then you can use GtkApplication's much simpler API dedicated to this purpose:
Gtk.Application.get_active_window():
Gets the “active” window for the application.
The active window is the one that was most recently focused (within the application). This window may not have the focus at the moment if another application has it — this is just the most recently-focused window within this application.
import subprocess; subprocess.Popen(['/bin/bash', '-c', 'xdotool getactivewindow'])GtkApplication, of which there apparently can be >1 per process, though I'm not sure anyone has ever found any use for that).