Issue
I’m trying to position my window based on with width and height of the window. On Windows, the window size reported by wm_geometry, winfo_width and winfo_height is the size of the client area, i.e. the window size without the borders. The position of the window, as reported by wm_geometry, winfo_x and winfo_y, and the position set using wm_geometry, is the position of the top left point of the window including the border.
This means that when I try to center the window on the screen, the position is visibly too low on the screen.
I don’t want to hard-code the border thickness since it can vary.
Is it possible to get or infer the size of the window border on Windows using Python/tkinter?
Solution
From http://wiki.tcl.tk/11291:
wm geometry . returns contentsWidthxcontentsHeight+decorationTop+decorationLeftEdge.
and winfo rooty . returns contentsTop
and winfo rootx . returns contentsLeftEdge
From these you can calculate the title bar height and left border width (which generally matches the right and bottom border width). This should work on windows, but will not necessarily work on all platforms. As the linked page also examines, there are also issues in determining the total height and width of the screen area available due to the windows taskbar.
Answered By – Brad Lanam
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