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Backport PR #22147 on branch v3.5.x (Fix loading user-defined icons for Tk toolbar) #22153

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Merged
merged 1 commit into from
Jan 8, 2022
Merged

Backport PR #22147 on branch v3.5.x (Fix loading user-defined icons for Tk toolbar) #22153

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10 changes: 8 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 @@ -636,9 +636,15 @@ def _set_image_for_button(self, button):
if button._image_file is None:
return

# Allow _image_file to be relative to Matplotlib's "images" data
# directory.
path_regular = cbook._get_data_path('images', button._image_file)
path_large = path_regular.with_name(
path_regular.name.replace('.png', '_large.png'))
size = button.winfo_pixels('18p')
with Image.open(button._image_file.replace('.png', '_large.png')
if size > 24 else button._image_file) as im:
# Use the high-resolution (48x48 px) icon if it exists and is needed
with Image.open(path_large if (size > 24 and path_large.exists())
else path_regular) as im:
image = ImageTk.PhotoImage(im.resize((size, size)), master=self)
button.configure(image=image, height='18p', width='18p')
button._ntimage = image # Prevent garbage collection.
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