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[detection view] improving zooming under mac

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This commit is contained in:
Jan Grewe 2025-02-10 11:07:08 +01:00
parent 1e86a74549
commit 6244f7fdbe
1 changed files with 18 additions and 10 deletions
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26
fixtracks/widgets/detectionview.py
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@ -92,6 +92,7 @@ class DetectionView(QWidget):
self._view = QGraphicsView()
self._view.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding)
self._view.setMouseTracking(True)
self._mouseEnabled = True
self._zoomFactor = 1.15
self._minZoom = 0.1
self._maxZoom = 10
@ -102,16 +103,23 @@ class DetectionView(QWidget):
self.setLayout(lyt)
def wheelEvent(self, event):
if event.angleDelta().y() > 0: # Zoom in
factor = self._zoomFactor
else: # Zoom out
factor = 1 / self._zoomFactor
newZoom = self._currentZoom * factor
if not self._mouseEnabled:
super().wheelEvent(event)
return
modifiers = event.modifiers()
if modifiers == Qt.ControlModifier:
delta = event.angleDelta().x()
if delta == 0:
delta = event.angleDelta().y()
sc = 1.001 ** delta
self._view.scale(sc, sc)
else:
super().wheelEvent(event)
if self._minZoom < newZoom < self._maxZoom:
self._view.scale(factor, factor)
self._currentZoom = newZoom
# elif modifiers == Qt.ShiftModifier:
# print("Shift key pressed")
# elif modifiers == Qt.AltModifier:
# print("Alt key pressed")
def setImage(self, image: QImage):
self._img = image