Get the Qt Quartz backend working again#679
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jwiggins
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Mar 4, 2021
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| from kiva.api import Font | ||
| from kiva.quartz import get_mac_context, ABCGI | ||
| from kiva.quartz import ABCGI |
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Now that get_mac_context is not needed, we should revisit whether to include it.
aaronayres35
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Mar 4, 2021
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Changes LGTM
I ran ETS_TOOLKIT=qt4.quartz python kiva_explorer.py and things seemed to all be working / look fine.
One question: I noticed in many other files in enable/qt4 in the create_gc method there is a gc.translate_ctm(0.5, 0.5)
Is this because of the ideas on this slide of the LnL:
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I believe there is no half pixel translation because Quartz whole coordinates are already through the center of pixels instead of along the edge. |
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Closes #516
This PR switches the Qt Quartz backend from a Window-based GC to an offscreen GC, because the changes in Qt5 make it very difficult (or impossible?) to reuse the
CGContextReffrom Qt's widget.