def wheelEvent(self, event: QWheelEvent):
"""
WheelEvent is the callback for wheel events of the operating system.
Dependent on the OS, this can be a trackpad or a mouse wheel
"""
if not (self.imageOpened):
return
# Disable wheel if x position is leaving image compartment
if (event.x() > self.ui.verticalScrollBar.pos().x()):
return
if (event.source() == Qt.MouseEventSynthesizedBySystem):
# touch pad geasture - use direct scrolling, not zooming
# this is usually indicative for Mac OS
subs = np.asarray(
[float(event.pixelDelta().x()),
float(event.pixelDelta().y())]) / 32000.0 * self.getZoomValue()
self.relativeCoords -= subs
if (self.relativeCoords[0] < -0.5):
self.relativeCoords[0] = -0.5
if (self.relativeCoords[1] < -0.5):
self.relativeCoords[1] = -0.5
else: # mouse wheel - use scrolling
inc = 1
if (event.angleDelta().y() > 0):
inc = -1
self.setZoomValue(self.getZoomValue() * np.power(1.25, -inc))
self.showImage()
self.updateScrollbars()
def wheelEvent(self, evt: QtGui.QWheelEvent) -> None:
self.__mouse_pos = evt.pos()
measure_editor = self.track.measureEditorAt(evt.pos())
if isinstance(measure_editor, MeasureEditor):
measure_evt = QtGui.QWheelEvent(
evt.pos() - measure_editor.topLeft(), evt.globalPos(),
evt.pixelDelta(), evt.angleDelta(), 0, Qt.Horizontal,
evt.buttons(), evt.modifiers(), evt.phase(), evt.source())
measure_evt.setAccepted(False)
self.wheelMeasureEvent(measure_editor, measure_evt)
evt.setAccepted(measure_evt.isAccepted())
def eventFilter(self, object, event):
if (event.type() == QEvent.Wheel and not self.__d_ignoreWheelEvent):
we = QWheelEvent(event)
pos = self.wheelRect().center()
wheelEvent = QWheelEvent(pos, QWidget.mapToGlobal(self, pos),
we.pixelDelta(), we.angleDelta(),
we.buttons(), we.modifiers(), we.phase(),
we.inverted(), we.source())
self.__d_ignoreWheelEvent = True
QApplication.sendEvent(self, wheelEvent)
self.__d_ignoreWheelEvent = False
return True
return Qwt.QwtWheel.eventFilter(object, event)
def wheelEvent(self, evt: QtGui.QWheelEvent) -> None:
evt = QtGui.QWheelEvent(evt.pos() + self.offset(), evt.globalPos(),
evt.pixelDelta(), evt.angleDelta(), 0,
Qt.Horizontal, evt.buttons(), evt.modifiers(),
evt.phase(), evt.source())
self.__toolbox.wheelEvent(evt)
