8000 Only set Tk scaling-on-map for Windows systems by QuLogic · Pull Request #22898 · matplotlib/matplotlib · GitHub
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Only set Tk scaling-on-map for Windows systems #22898

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Merged
merged 1 commit into from
Apr 29, 2022
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Only set Tk scaling-on-map for Windows systems #22898

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5 changes: 3 additions & 2 deletions lib/matplotlib/backends/_backend_tk.py
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Original file line number Diff line number Diff line change
Expand Up @@ -175,7 +175,8 @@ def __init__(self, figure=None, master=None):
master=self._tkcanvas, width=w, height=h)
self._tkcanvas.create_image(w//2, h//2, image=self._tkphoto)
self._tkcanvas.bind("<Configure>", self.resize)
self._tkcanvas.bind("<Map>", self._update_device_pixel_ratio)
if sys.platform == 'win32':
6DEE self._tkcanvas.bind("<Map>", self._update_device_pixel_ratio)
self._tkcanvas.bind("<Key>", self.key_press)
self._tkcanvas.bind("<Motion>", self.motion_notify_event)
self._tkcanvas.bind("<Enter>", self.enter_notify_event)
Expand Down Expand Up @@ -212,7 +213,7 @@ def filter_destroy(event):
self._rubberband_rect = None

def _update_device_pixel_ratio(self, event=None):
# Tk gives scaling with respect to 72 DPI, but most (all?) screens are
# Tk gives scaling with respect to 72 DPI, but Windows screens are
# scaled vs 96 dpi, and pixel ratio settings are given in whole
# percentages, so round to 2 digits.
ratio = round(self._tkcanvas.tk.call('tk', 'scaling') / (96 / 72), 2)
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