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FIX: always eraseRect in Qt widget #13050

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Merged
merged 1 commit into from
Dec 30, 2018

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Re-focusing the figure window will call the draw method. If the
facecolor of the figure and axes are transparent and we do not
erase the widget we are effectively compositing the figure on to its
self which results in artifacts anywhere there is alpha or
anti-aliasing.

Closes #13012

@tacaswell tacaswell requested a review from anntzer December 25, 2018 18:28
@tacaswell tacaswell added this to the v3.1 milestone Dec 25, 2018
Re-focusing the figure window will call the draw method.  If the
facecolor of the figure and axes are transparent and we do not
erase the widget we are effectively compositing the figure on to its
self which results in artifacts anywhere there is alpha or
anti-aliasing.

Closes matplotlib#13012
@timhoffm timhoffm merged commit 879b7f0 into matplotlib:master Dec 30, 2018
@tacaswell tacaswell deleted the fix_qtagg_alpha branch December 30, 2018 17:07
pelson added a commit to pelson/matplotlib that referenced this pull request Mar 13, 2024
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3 participants