def initDirectionGraphicsView(self):
'''
Draw the coordinate-axes in the QGraphicsView that is responsible
for visualization of the gradient direction for a single selected
timestep
'''
view = self.graphicsView_direction
scene = QtGui.QGraphicsScene()
scene.setSceneRect(
-40, -40, 80,
80) #set scene to be 100x100 with 0, 0 beeing the center point
view.setScene(scene)
view.scale(
1, -1
) #reverse positive directions to match those in a common mathematical x/y plane
xAxes = myArrow(QtCore.QPointF(0, -40),
QtCore.QPointF(0, 40),
arrowHeadSize=5,
lineWidth=0.5)
yAxes = myArrow(QtCore.QPointF(-40, 0),
QtCore.QPointF(40, 0),
arrowHeadSize=5,
lineWidth=0.5)
scene.addItem(xAxes)
scene.addItem(yAxes)
self._arrow = None #pointer to the arrow object that will be created later
def on_singleGradientChanged(self, magnitude, direction):
""" Update QGraphicsView with the gradient data"""
self.clearSingleGradientDirectionArrow()
angle = angle2bearing(direction)[0]
self._arrow = myArrow(QtCore.QPointF(0, 0), None, angle=angle, length=40, lineWidth=1.5, arrowHeadSize=8, color=QtCore.Qt.blue)
#print 'adding item', self._arrow, ' >>> ',
self.graphicsView_direction.scene().addItem(self._arrow)
def initDirectionGraphicsView(self):
'''
Draw the coordinate-axes in the QGraphicsView that is responsible
for visualization of the gradient direction for a single selected
timestep
'''
view = self.graphicsView_direction
scene = QtGui.QGraphicsScene()
scene.setSceneRect(-40, -40, 80, 80) #set scene to be 100x100 with 0, 0 beeing the center point
view.setScene(scene)
view.scale(1, -1) #reverse positive directions to match those in a common mathematical x/y plane
xAxes = myArrow(QtCore.QPointF(0, -40), QtCore.QPointF(0, 40), arrowHeadSize=5, lineWidth=0.5)
yAxes = myArrow(QtCore.QPointF(-40, 0), QtCore.QPointF(40, 0), arrowHeadSize=5, lineWidth=0.5)
scene.addItem(xAxes)
scene.addItem(yAxes)
self._arrow = None #pointer to the arrow object that will be created later
def on_singleGradientChanged(self, magnitude, direction):
""" Update QGraphicsView with the gradient data"""
self.clearSingleGradientDirectionArrow()
angle = angle2bearing(direction)[0]
self._arrow = myArrow(QtCore.QPointF(0, 0),
None,
angle=angle,
length=40,
lineWidth=1.5,
arrowHeadSize=8,
color=QtCore.Qt.blue)
#print 'adding item', self._arrow, ' >>> ',
self.graphicsView_direction.scene().addItem(self._arrow)