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Backport PR #22135 on branch v3.5.x (Fix loading user-defined icons for Qt plot window) #22152

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Merged
merged 1 commit into from
Jan 8, 2022
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Merged

Backport PR #22135 on branch v3.5.x (Fix loading user-defined icons for Qt plot window) #22152

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10 changes: 8 additions & 2 deletions lib/matplotlib/backends/backend_qt.py
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Original file line number Diff line number Diff line change
Expand Up @@ -677,8 +677,14 @@ def _icon(self, name):
Construct a `.QIcon` from an image file *name*, including the extension
and relative to Matplotlib's "images" data directory.
"""
name = name.replace('.png', '_large.png')
pm = QtGui.QPixmap(str(cbook._get_data_path('images', name)))
# use a high-resolution icon with suffix '_large' if available
# note: user-provided icons may not have '_large' versions
path_regular = cbook._get_data_path('images', name)
path_large = path_regular.with_name(
path_regular.name.replace('.png', '_large.png'))
filename = str(path_large if path_large.exists() else path_regular)

pm = QtGui.QPixmap(filename)
_setDevicePixelRatio(pm, _devicePixelRatioF(self))
if self.palette().color(self.backgroundRole()).value() < 128:
icon_color = self.palette().color(self.foregroundRole())
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