def wheelEvent(self, event: QWheelEvent) -> None:
scale = 1.25
maxZoom = 2
minZoom = 0.5
transform: QTransform = self.transform()
zoom = transform.m11()
# zoom in and out with the mouse setting origin
if (event.angleDelta().y() > 0) and (zoom < maxZoom):
self.scale(scale, scale)
pos: QPointF = self.mapToScene(event.pos())
self.translate(-(scale - 1) * pos.x(), -(scale - 1) * pos.y())
elif (event.angleDelta().y() < 0) and (zoom > minZoom):
self.scale(1 / scale, 1 / scale)
pos: QPointF = self.mapToScene(event.pos())
self.translate(-(1 / scale - 1) * pos.x(),
-(1 / scale - 1) * pos.y())
event.accept()
def __cloneMouseWheelEvent(self, e: QWheelEvent):
pos = e.pos()
globalPos = e.globalPos()
pixelDelta = e.pixelDelta()
angleDelta = e.angleDelta()
buttons = e.buttons()
modifiers = e.modifiers()
phase = e.phase()
inverted = e.inverted()
clone = QWheelEvent(pos, globalPos, pixelDelta, angleDelta, buttons,
modifiers, phase, inverted)
clone.ignore()
clone.accepted = False
return clone
def wheelEvent(self, event: QtGui.QWheelEvent) -> None:
cpt = QPoint_to_point(event.pos())
if not event.modifiers():
step = event.angleDelta().y() / 120.0
self.zoom(step, cpt)
else:
if self.interactionDelegate:
step = event.angleDelta().y() / 120.0
if step < 0:
step = - step
code = EventID.Mouse_WheelDown
else:
code = EventID.Mouse_WheelUp
w_pt = self.viewState.tfV2W(cpt)
tool_event = ToolActionEvent(code, cpt, w_pt, step)
self.interactionDelegate.tool_event(tool_event)
self.update()