Calculate initial GTK window size using logical DPI

QuLogic · QuLogic · commit f53c28d84e1f · 2021-09-15T15:18:43.000-04:00
Otherwise, if the pixel ratio is changed before the window is created,
the window will be scaled up an extra time. This occurs on GTK3, but not
GTK4, due to some different order of events, but I changed the GTK4
backend to do the same for consistency.
diff --git a/lib/matplotlib/backends/backend_gtk3.py b/lib/matplotlib/backends/backend_gtk3.py
@@ -340,8 +340,7 @@ def __init__(self, canvas, num):
 
         self.vbox.pack_start(self.canvas, True, True, 0)
         # calculate size for window
-        w = int(self.canvas.figure.bbox.width)
-        h = int(self.canvas.figure.bbox.height)
+        w, h = self.canvas.get_width_height()
 
         self.toolbar = self._get_toolbar()
 
diff --git a/lib/matplotlib/backends/backend_gtk4.py b/lib/matplotlib/backends/backend_gtk4.py
@@ -287,8 +287,7 @@ def __init__(self, canvas, num):
 
         self.vbox.prepend(self.canvas)
         # calculate size for window
-        w = int(self.canvas.figure.bbox.width)
-        h = int(self.canvas.figure.bbox.height)
+        w, h = self.canvas.get_width_height()
 
         self.toolbar = self._get_toolbar()
 
