Get screen size with tkinter instead

screeninfo caused a bouncing python rocket in the dock on mac, and didn't work.

README.md

@@ -224,6 +224,8 @@ GNOME Terminal works best, with crisp triangles used for icons in dialogs, emoji
 
 ### macOS
 
+For **Set As Wallpaper**, it works better if you install tkinter, with `brew install python-tk`, so it can use your monitor's resolution. (This dependency could be removed in the future.)
+
 Tested on OSX 10.14 (Mojave), with iTerm2, and VS Code's integrated terminal.
 
 iTerm2 mostly works, but two tool icons are missing (Free-Form Select and Fill With Color).

cspell.json

@@ -109,6 +109,7 @@
 		"textconv",
 		"thumbnailer",
 		"Thunar",
+		"tkinter",
 		"tlaplus",
 		"truecolor",
 		"tspan",

requirements.txt

@@ -5,7 +5,6 @@ pyfiglet==0.8.post1
 # PyGObject==3.42.1 # gi.repository module, used for setting the wallpaper on gnome, unity, and cinnamon; optional, falls back to gsettings CLI
 pyperclip==1.8.2
 pyxdg==0.28 # xdg module, used for wallpaper setting; optional, falls back to ~/.config
-screeninfo==0.8.1 # used for wallpaper setting
 rich==13.3.5
 stransi==0.3.0
 textual[dev]==0.27.0

src/textual_paint/paint.py

@@ -3590,17 +3590,25 @@ Columns: {len(palette) // 2}
     def get_screen_size(self) -> tuple[int, int]:
         """Get the screen size."""
         # TODO: test DPI scaling
-        from screeninfo import get_monitors
-        largest_area = 0
-        largest_monitor = None
-        for m in get_monitors():
-            area = m.width * m.height
-            if area > largest_area:
-                largest_area = area
-                largest_monitor = m
-        assert largest_monitor is not None, "No monitors found."
-        return largest_monitor.width, largest_monitor.height
+        try:
+            # from screeninfo import get_monitors
+            # largest_area = 0
+            # largest_monitor = None
+            # for m in get_monitors():
+            #     area = m.width * m.height
+            #     if area > largest_area:
+            #         largest_area = area
+            #         largest_monitor = m
+            # assert largest_monitor is not None, "No monitors found."
+            # return largest_monitor.width, largest_monitor.height
 
+            import tkinter
+            root = tkinter.Tk()
+            root.withdraw()
+            return root.winfo_screenwidth(), root.winfo_screenheight()
+        except Exception as e:
+            print("Failed to get screen size:", e)
+            return 1920, 1080
 
     def action_recent_file(self) -> None:
         self.message_box(_("Paint"), "Not implemented.", "ok")