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1 parent 067f9b6 commit 419da79Copy full SHA for 419da79
1 file changed
lib/matplotlib/backends/backend_qt5.py
@@ -263,9 +263,16 @@ def leaveEvent(self, event):
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FigureCanvasBase.leave_notify_event(self, guiEvent=event)
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def mouseEventCoords(self, pos):
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- x = pos.x() * self._dpi_ratio
+ """
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+ Calculate mouse coordinates in logical pixels.
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+
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+ Qt5 and Matplotlib use logical pixels, but the figure is scaled to
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+ physical pixels for rendering. Also, the origin is different and needs
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+ to be corrected.
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+ x = pos.x()
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# flip y so y=0 is bottom of canvas
- y = self.figure.bbox.height - pos.y() * self._dpi_ratio
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+ y = self.figure.bbox.height / self._dpi_ratio - pos.y()
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return x, y
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def mousePressEvent(self, event):
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