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Cairo rendering for Qt5 #8771

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2abdcea
Qt5Cairo backend.
anntzer Jun 15, 2017
d4957ec
Qt4Cairo backend.
anntzer Jun 18, 2017
d2f2bc0
Update backends docs.
anntzer Jun 18, 2017
f884ffa
Update backends API docs.
anntzer Jun 18, 2017
bcb08e9
Let cairo track surface size; fix Pyside refcnt bug.
anntzer Jun 19, 2017
2eac3fa
Fix mandelbrot example.
anntzer Jun 20, 2017
138ba58
Make sure only one cairo binding is ever used; fix docs.
anntzer Jun 20, 2017
d96d104
No need to process_updates in gtk3.
anntzer Jul 23, 2017
5087c05
Qt dpi handling should be renderer-agnostic.
anntzer Aug 1, 2017
89a87d0
Fix vector output from cairo.
anntzer Aug 3, 2017
56854ae
In QtCairo, also save figures using cairo.
anntzer Aug 3, 2017
ab61783
Fix doc builds.
anntzer Aug 26, 2017
8946c38
Fix hidpi in qt5cairo.
anntzer Dec 29, 2017
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Fix hidpi in qt5cairo.
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@anntzer
anntzer committed Jan 9, 2018
commit 8946c385940e83b44bc80738a2dd1a66b4afc555
8 changes: 6 additions & 2 deletions lib/matplotlib/backends/backend_qt5cairo.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,8 +10,9 @@ def __init__(self, figure):

def paintEvent(self, event):
self._update_dpi()
width = self.width()
height = self.height()
dpi_ratio = self._dpi_ratio
width = dpi_ratio * self.width()
height = dpi_ratio * self.height()
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
self._renderer.set_ctx_from_surface(surface)
self._renderer.set_width_height(width, height)
Expand All @@ -23,6 +24,9 @@ def paintEvent(self, event):
# QImage under PySide on Python 3.
if QT_API == 'PySide' and six.PY3:
ctypes.c_long.from_address(id(buf)).value = 1
if hasattr(qimage, 'setDevicePixelRatio'):
# Not available on Qt4 or some older Qt5.
qimage.setDevicePixelRatio(dpi_ratio)
painter = QtGui.QPainter(self)
painter.drawImage(0, 0, qimage)
self._draw_rect_callback(painter)
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