FIX: deal with negative canvas dimension in Qt #6152
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In some cases Qt may report having a negative height (and presumably width) in the case of minimizing windows / widgets. This causes issues at the Agg layer when the re-size triggers a re-draw which tries to get a renderer with a negative dimension (segfaults or OutOfMemory errors).
jenshnielsen
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Mar 14, 2016
FIX: deal with negative canvas dimension in Qt
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In some cases Qt may report having a negative height (and presumably
width) in the case of minimizing windows / widgets. This causes issues
at the Agg layer when the re-size triggers a re-draw which tries to get
a renderer with a negative dimension (segfaults or OutOfMemory errors).
reported via https://stackoverflow.com/questions/35977326/a-figurecanvasqtagg-nested-in-a-qmdisubwindow-segfaults-when-i-minimize-the-qmdi