CODEWITHSUNDEEP
pythontkinterxserver
gboffi
gboffi

Reputation: 25093

Where is Tkinter sourcing info about the screen DPI?

Using X on Linux, Tkinter (Python 3.12) tells me that I have a DPI value of ~96 (wrong), while the X server tells me that my DPI value is ~185 (correct).

In [1]: import tkinter as tk
   ...: root = tk.Tk()
   ...: print(root.winfo_fpixels('1i'))
   ...: root.destroy()
   ...: 
   ...: xrandr_out = ! xrandr
   ...: xy_in = [int(mm[:-2])/25.4 for mm in xrandr_out[1][-13:].split(' x ')]
   ...: xy_pix = [int(pixels) for pixels in xrandr_out[2].split()[0].split('x')]
   ...: dpi_x, dpi_y = [pixels/dimension for pixels, dimension in zip(xy_pix, xy_in)]
   ...: print(dpi_x, dpi_y)
   ...: 
96.08406304728547
185.35135135135135 185.66497461928932

In [2]:

(I'm sorry for the convoluted way of finding the real DPI value, it is possible that you have to adjust my code to make it work on your distribution.)

Where does Tkinter find the incorrect information regarding the DPI value?

Upvotes: 2

Views: 71

Answers (0)

Related Questions