def _wheel_event_wrapper(self, orig_func, ev):
# scrolling on the border is simply annoying, pop in a couple of pixels to make sure
d = QtCore.QPoint(-2, 0)
ev = QtGui.QWheelEvent(ev.pos() + d,
ev.globalPos() + d, ev.pixelDelta(),
ev.angleDelta(),
ev.angleDelta().y(), QtCore.Qt.Vertical,
ev.buttons(), ev.modifiers())
orig_func(self, ev)
def update(self, *args, **kwargs):
super().update(*args, **kwargs)
if self.widget:
origin = QtCore.QPoint(self.values['origin x'],
self.values['origin y'])
self.roi.setPos(origin.x(), origin.y(), finish=False)
self.roi.setSize(
(self.values['extent x'], self.values['extent y']),
finish=False)
def set_values(self, *args, **kwargs):
# need to block signals to the stateGroup otherwise stateGroup.sigChanged
# will be emmitted by setValue causing update to be called
self.stateGroup.blockSignals(True)
roi = args[0]
extent, _, origin = roi.getAffineSliceParams(
self.widget.imageItem.image, self.widget.imageItem)
origin = QtCore.QPoint(*origin) * self.widget.transform
extent = QtCore.QPoint(*extent)
self.values['origin x'] = origin.x()
self.values['origin y'] = origin.y()
self.values['extent x'] = extent.x()
self.values['extent y'] = extent.y()
self.ctrls['origin x'].setValue(self.values['origin x'])
self.ctrls['extent x'].setValue(self.values['extent x'])
self.ctrls['origin y'].setValue(self.values['origin y'])
self.ctrls['extent y'].setValue(self.values['extent y'])
self.stateGroup.blockSignals(False)
self.sigStateChanged.emit(self)
def readSettings(self):
settings = QtCore.QSettings('dataviz', 'dataviz')
self.lastDir = settings.value('lastDir', '.', str)
pos = settings.value('pos', QtCore.QPoint(200, 200))
if isinstance(pos, QtCore.QVariant):
pos = pos.toPyObject()
self.move(pos)
size = settings.value('size', QtCore.QSize(400, 400))
if isinstance(size, QtCore.QVariant):
size = size.toPyObject()
self.resize(size)
