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Merge pull request #978 from glubsy/fix_zoom_scrollbar

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Fix image viewer scrollbar zoom
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Andrew Senetar 2022-03-14 20:43:40 -05:00 committed by GitHub
commit efc99eee96
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1 changed files with 26 additions and 8 deletions
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34
qt/pe/image_viewer.py
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@ -1041,26 +1041,44 @@ class ScrollAreaImageViewer(QScrollArea):
"""After scaling, no mouse position, default to center."""
# scrollBar.setMaximum(scrollBar.maximum() - scrollBar.minimum() + scrollBar.pageStep())
self._horizontalScrollBar.setValue(
int(factor * self._horizontalScrollBar.value() + ((factor - 1) * self._horizontalScrollBar.pageStep() / 2))
int(
factor * self._horizontalScrollBar.value()
+ ((factor - 1) * self._horizontalScrollBar.pageStep() / 2)
)
)
self._verticalScrollBar.setValue(
int(factor * self._verticalScrollBar.value() + ((factor - 1) * self._verticalScrollBar.pageStep() / 2))
int(
factor * self._verticalScrollBar.value()
+ ((factor - 1) * self._verticalScrollBar.pageStep() / 2)
)
)
def adjustScrollBarsScaled(self, delta):
"""After scaling with the mouse, update relative to mouse position."""
self._horizontalScrollBar.setValue(self._horizontalScrollBar.value() + delta.x())
self._verticalScrollBar.setValue(self._verticalScrollBar.value() + delta.y())
self._horizontalScrollBar.setValue(
int(self._horizontalScrollBar.value() + delta.x())
)
self._verticalScrollBar.setValue(
int(self._verticalScrollBar.value() + delta.y())
)
def adjustScrollBarsAuto(self):
"""After panning, update accordingly."""
self.horizontalScrollBar().setValue(self.horizontalScrollBar().value() - self._mousePanningDelta.x())
self.verticalScrollBar().setValue(self.verticalScrollBar().value() - self._mousePanningDelta.y())
self.horizontalScrollBar().setValue(
int(self.horizontalScrollBar().value() - self._mousePanningDelta.x())
)
self.verticalScrollBar().setValue(
int(self.verticalScrollBar().value() - self._mousePanningDelta.y())
)
def adjustScrollBarCentered(self):
"""Just center in the middle."""
self._horizontalScrollBar.setValue(int(self._horizontalScrollBar.maximum() / 2))
self._verticalScrollBar.setValue(int(self._verticalScrollBar.maximum() / 2))
self._horizontalScrollBar.setValue(
int(self._horizontalScrollBar.maximum() / 2)
)
self._verticalScrollBar.setValue(
int(self._verticalScrollBar.maximum() / 2)
)
def resetCenter(self):
"""Resets origin"""