def test_midpoint(self):
self.assertEqual(QPointF(5, 0), midpoint(QPointF(0, 0), QPointF(10,
0)))
self.assertEqual(QPointF(0, 5), midpoint(QPointF(0, 0), QPointF(0,
10)))
self.assertEqual(QPointF(5, 5), midpoint(QPointF(0, 0),
QPointF(10, 10)))
def viewportEvent(self, viewportEvent):
"""
Perform pinch to zoom feature to scale the viewport.
:type viewportEvent: QTouchEvent
"""
if viewportEvent.type() in {QtCore.QEvent.TouchBegin, QtCore.QEvent.TouchUpdate, QtCore.QEvent.TouchEnd}:
if viewportEvent.type() in {QtCore.QEvent.TouchBegin, QtCore.QEvent.TouchEnd}:
self.pinchFactor = 1.0
pts = viewportEvent.touchPoints()
if len(pts) == 2:
p0 = pts[0]
p1 = pts[1]
p2 = midpoint(p0.pos(), p1.pos())
pinchFactor = QtCore.QLineF(p0.pos(), p1.pos()).length() / QtCore.QLineF(p0.startPos(), p1.startPos()).length()
pinchFactor = snapF(pinchFactor, DiagramView.PinchSize)
if pinchFactor < DiagramView.PinchGuard[0] or pinchFactor > DiagramView.PinchGuard[1]:
if pinchFactor != self.pinchFactor:
zoom = self.zoom
zoom += +DiagramView.ZoomStep if pinchFactor > self.pinchFactor else -DiagramView.ZoomStep
zoom = clamp(zoom, DiagramView.ZoomMin, DiagramView.ZoomMax)
self.pinchFactor = pinchFactor
if zoom != self.zoom:
self.scaleViewOnPoint(zoom, p2.toPoint())
return super().viewportEvent(viewportEvent)
def updatePos(self, points):
"""
Update the current text position with respect to the shape.
:type points: T <= tuple | list
"""
if not points:
return
if self.isCentered():
# Here the label should be centered in the edge path.
# In this case we need to handle 2 different situations:
# 1. when the edge path is composed of an even number of points (odd subpaths)
# 2. when the edge path is composed of an odd number of points (even subpaths)
if len(points) % 2 == 0:
# If we have an even number of points, compute the position of the label
# according to the midpoint of the subpath connecting the middle points.
p1 = points[int(len(points) / 2) - 1]
p2 = points[int(len(points) / 2)]
mid = midpoint(p1, p2)
rad = angle(p1, p2)
spaceX = -40
spaceY = -16
self.setPos(
QtCore.QPointF(mid.x() + spaceX * sin(rad),
mid.y() + spaceY * cos(rad)))
else:
# If we have an odd number of points compute the position
# of the label according the point in the middle of the edge.
mid = points[int(len(points) / 2)]
rad1 = angle(points[int(len(points) / 2) - 1], mid)
rad2 = angle(mid, points[int(len(points) / 2) + 1])
diff = rad2 - rad1
spaceX1 = 0
spaceX2 = 0
spaceY = -16
if 0 < diff < M_PI:
spaceX1 = -80 * sin(rad1)
spaceX2 = -80 * sin(rad2)
spaceY += spaceY * sin(diff) * 1.8
self.setPos(
QtCore.QPointF(mid.x() + spaceX1 + spaceX2,
mid.y() + spaceY))
else:
# Here instead we will place the label near the intersection with
# the target shape: this is mostly used for input edges connecting
# role chain nodes and property assertion nodes, so we can inspect
# visually the partecipation order of connected nodes without having
# to scroll the diagram.
rad = angle(points[-2], points[-1])
pos = points[-1] - QtCore.QPointF(
sin(rad + M_PI / 3.0) * 20,
cos(rad + M_PI / 3.0) * 20)
self.setPos(pos)
def updatePos(self, points):
"""
Update the current text position with respect to the shape.
:type points: T <= tuple | list
"""
if not points:
return
if self.isCentered():
# Here the label should be centered in the edge path.
# In this case we need to handle 2 different situations:
# 1. when the edge path is composed of an even number of points (odd subpaths)
# 2. when the edge path is composed of an odd number of points (even subpaths)
if len(points) % 2 == 0:
# If we have an even number of points, compute the position of the label
# according to the midpoint of the subpath connecting the middle points.
p1 = points[int(len(points) / 2) - 1]
p2 = points[int(len(points) / 2)]
mid = midpoint(p1, p2)
rad = angle(p1, p2)
spaceX = -40
spaceY = -16
self.setPos(QtCore.QPointF(mid.x() + spaceX * sin(rad), mid.y() + spaceY * cos(rad)))
else:
# If we have an odd number of points compute the position
# of the label according the point in the middle of the edge.
mid = points[int(len(points) / 2)]
rad1 = angle(points[int(len(points) / 2) - 1], mid)
rad2 = angle(mid, points[int(len(points) / 2) + 1])
diff = rad2 - rad1
spaceX1 = 0
spaceX2 = 0
spaceY = -16
if 0 < diff < M_PI:
spaceX1 = -80 * sin(rad1)
spaceX2 = -80 * sin(rad2)
spaceY += spaceY * sin(diff) * 1.8
self.setPos(QtCore.QPointF(mid.x() + spaceX1 + spaceX2, mid.y() + spaceY))
else:
# Here instead we will place the label near the intersection with
# the target shape: this is mostly used for input edges connecting
# role chain nodes and property assertion nodes, so we can inspect
# visually the partecipation order of connected nodes without having
# to scroll the diagram.
rad = angle(points[-2], points[-1])
pos = points[-1] - QtCore.QPointF(sin(rad + M_PI / 3.0) * 20, cos(rad + M_PI / 3.0) * 20)
self.setPos(pos)
def viewportEvent(self, viewportEvent):
"""
Perform pinch to zoom feature to scale the viewport.
:type viewportEvent: QTouchEvent
"""
if viewportEvent.type() in {
QtCore.QEvent.TouchBegin, QtCore.QEvent.TouchUpdate,
QtCore.QEvent.TouchEnd
}:
if viewportEvent.type() in {
QtCore.QEvent.TouchBegin, QtCore.QEvent.TouchEnd
}:
self.pinchFactor = 1.0
pts = viewportEvent.touchPoints()
if len(pts) == 2:
p0 = pts[0]
p1 = pts[1]
p2 = midpoint(p0.pos(), p1.pos())
pinchFactor = QtCore.QLineF(
p0.pos(), p1.pos()).length() / QtCore.QLineF(
p0.startPos(), p1.startPos()).length()
pinchFactor = snapF(pinchFactor, DiagramView.PinchSize)
if pinchFactor < DiagramView.PinchGuard[
0] or pinchFactor > DiagramView.PinchGuard[1]:
if pinchFactor != self.pinchFactor:
zoom = self.zoom
zoom += +DiagramView.ZoomStep if pinchFactor > self.pinchFactor else -DiagramView.ZoomStep
zoom = clamp(zoom, DiagramView.ZoomMin,
DiagramView.ZoomMax)
self.pinchFactor = pinchFactor
if zoom != self.zoom:
self.scaleViewOnPoint(zoom, p2.toPoint())
return super().viewportEvent(viewportEvent)
def test_midpoint(self):
self.assertEqual(QtCore.QPointF(5, 0), midpoint(QtCore.QPointF(0, 0), QtCore.QPointF(10, 0)))
self.assertEqual(QtCore.QPointF(0, 5), midpoint(QtCore.QPointF(0, 0), QtCore.QPointF(0, 10)))
self.assertEqual(QtCore.QPointF(5, 5), midpoint(QtCore.QPointF(0, 0), QtCore.QPointF(10, 10)))
def test_midpoint():
assert QtCore.QPointF(5, 0) == midpoint(QtCore.QPointF(0, 0), QtCore.QPointF(10, 0))
assert QtCore.QPointF(0, 5) == midpoint(QtCore.QPointF(0, 0), QtCore.QPointF(0, 10))
assert QtCore.QPointF(5, 5) == midpoint(QtCore.QPointF(0, 0), QtCore.QPointF(10, 10))
