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Fix AttributeError: 'QPixmap' object has no attribute 'setDevicePixelRatio' #8559

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tacaswell merged 1 commit into from
May 3, 2017
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Fix AttributeError: 'QPixmap' object has no attribute 'setDevicePixelRatio' #8559

tacaswell merged 1 commit into from
May 3, 2017

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@cgohlke
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@cgohlke cgohlke commented May 2, 2017

Re #8440.
Using matplotlib-2.0.1 with PyQt4‑4.11.4, the example embedding_in_qt4_wtoolbar.py fails:

X:\Python36\lib\site-packages\matplotlib\backends\qt4_compat.py:10: MatplotlibDeprecationWarning: This module has been deprecated in 1.4 in favor of matplotlib.backends.qt_compat
This module will be removed in 1.5, please update your imports.
  warnings.warn(_warn_str, mplDeprecation)
Traceback (most recent call last):
  File "embedding_in_qt4_wtoolbar.py", line 74, in <module>
    main()
  File "embedding_in_qt4_wtoolbar.py", line 69, in main
    form = AppForm()
  File "embedding_in_qt4_wtoolbar.py", line 27, in __init__
    self.create_main_frame()
  File "embedding_in_qt4_wtoolbar.py", line 39, in create_main_frame
    self.mpl_toolbar = NavigationToolbar(self.canvas, self.main_frame)
  File "X:\Python36\lib\site-packages\matplotlib\backends\backend_qt5.py", line 585, in __init__
    NavigationToolbar2.__init__(self, canvas)
  File "X:\Python36\lib\site-packages\matplotlib\backend_bases.py", line 2760, in __init__
    self._init_toolbar()
  File "X:\Python36\lib\site-packages\matplotlib\backends\backend_qt5.py", line 601, in _init_toolbar
    a = self.addAction(self._icon(image_file + '.png'),
  File "X:\Python36\lib\site-packages\matplotlib\backends\backend_qt5.py", line 591, in _icon
    pm.setDevicePixelRatio(self.canvas._dpi_ratio)
AttributeError: 'QPixmap' object has no attribute 'setDevicePixelRatio'

@WeatherGod
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WeatherGod commented May 2, 2017

attn: @efiring

efiring
efiring approved these changes May 2, 2017
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This looks right to me, and appears to be the only place where the conditional was missed.

@efiring efiring changed the title Fix AttributeError: 'QPixmap' object has no attribute 'setDevicePixelRatio' [MRG+1] Fix AttributeError: 'QPixmap' object has no attribute 'setDevicePixelRatio' May 2, 2017
@tacaswell tacaswell merged commit f92e79c into matplotlib:v2.0.x May 3, 2017
@QuLogic QuLogic added this to the 2.0.2 (next bug fix release) milestone May 3, 2017
@QuLogic QuLogic changed the title [MRG+1] Fix AttributeError: 'QPixmap' object has no attribute 'setDevicePixelRatio' Fix AttributeError: 'QPixmap' object has no attribute 'setDevicePixelRatio' May 3, 2017
@jenshnielsen jenshnielsen mentioned this pull request May 3, 2017
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@tacaswell tacaswell mentioned this pull request May 3, 2017
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@sciunto sciunto mentioned this pull request May 6, 2017
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@tacaswell tacaswell modified the milestones: 2.0.3 (next bug fix release), 2.0.2 (critical bug fixes from 2.0.1) May 7, 2017
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v2.0.2 (critical bug fixes from 2.0.1)

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@cgohlke @WeatherGod @efiring @tacaswell @QuLogic