Allow stickies to be created under Wayland. (#146)

Wayland doesn't support default monitors. Also X11 users may choose not to have a default monitor (not sure why they would).

This manifests in Wayland users not being able to create new stickies at all. For now choose monitor 0 for the display. There are probably better approaches (eg find monitor of manager window), but they are more complex. This clears the bug.

Co-authored-by: Clement Lefebvre <clement.lefebvre@linuxmint.com>

Author: dereified

usr/lib/sticky/sticky.py

@@ -1004,9 +1004,13 @@ def find_note_location(self, x, y, direction):
         return x, y
 
     def get_direction(self, parent=None):
-        workarea_rect = Gdk.Monitor.get_workarea(
-            Gdk.Display.get_primary_monitor(Gdk.Display.get_default())
-        )
+        monitor = Gdk.Display.get_primary_monitor(Gdk.Display.get_default())
+        if monitor == None:
+            # if user has no monitor configured, or uses Wayland, for now guess
+            # monitor 0 (better than a crash)
+            monitor = Gdk.Display.get_monitor(Gdk.Display.get_default(),0)
+
+        workarea_rect = Gdk.Monitor.get_workarea(monitor)
         direction = [1, 1]
         if parent:
             if parent.x > (workarea_rect.width / 2):