1 files changed, 33 insertions, 0 deletions
diff --git a/test/fixratio.py b/test/fixratio.py
new file mode 100644
index 0000000..a9393cd
--- /dev/null
+++ b/test/fixratio.py
@@ -0,0 +1,33 @@
+import tkinter as tk
+WIDTH, HEIGHT = 400, 300  # Defines aspect ratio of window.
+
+def maintain_aspect_ratio(event, aspect_ratio):
+    """ Event handler to override root window resize events to maintain the
+        specified width to height aspect ratio.
+    """
+    if event.widget.master:  # Not root window?
+        return  # Ignore.
+
+    # <Configure> events contain the widget's new width and height in pixels.
+    new_aspect_ratio = event.width / event.height
+
+    # Decide which dimension controls.
+    if new_aspect_ratio > aspect_ratio:
+        # Use width as the controlling dimension.
+        desired_width = event.width
+        desired_height = int(event.width / aspect_ratio)
+    else:
+        # Use height as the controlling dimension.
+        desired_height = event.height
+        desired_width = int(event.height * aspect_ratio)
+
+    # Override if necessary.
+    if event.width != desired_width or event.height != desired_height:
+        # Manually give it the proper dimensions.
+        event.widget.geometry(f'{desired_width}x{desired_height}')
+        return "break"  # Block further processing of this event.
+
+root = tk.Tk()
+root.geometry(f'{WIDTH}x{HEIGHT}')
+root.bind('<Configure>', lambda event: maintain_aspect_ratio(event, WIDTH/HEIGHT))
+root.mainloop()