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from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QGraphicsView
class customView(QGraphicsView):
def __init__(self, scene = None, parent=None):
if scene is not None:
super(customView, self).__init__(scene, parent)
else:
super(customView, self).__init__(parent)
self._zoom = 1
self.setDragMode(True)
def wheelEvent(self, QWheelEvent):
if Qt.ControlModifier:
if QWheelEvent.source() == Qt.MouseEventNotSynthesized:
if self.zoom + QWheelEvent.angleDelta().y()/2880 > 0.1:
self.zoom += QWheelEvent.angleDelta().y()/2880
else:
if self.zoom + QWheelEvent.pixelDelta().y() > 0.1:
self.zoom += QWheelEvent.angleDelta().y()
QWheelEvent.accept()
else:
return super().wheelEvent(self, QWheelEvent)
@property
def zoom(self):
return self._zoom
@zoom.setter
def zoom(self, value):
temp = self.zoom
self._zoom = value
self.scale(self.zoom / temp, self.zoom / temp)
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