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FIX: always eraseRect in Qt widget#13050
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Re-focusing the figure window will call the draw method. If thefacecolor of the figure and axes are transparent and we do noterase the widget we are effectively compositing the figure on to itsself which results in artifacts anywhere there is alpha oranti-aliasing.Closesmatplotlib#13012
anntzer approved these changesDec 29, 2018
timhoffm approved these changesDec 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