def mousePressEvent(self, event):
self.point_edited = self.point_at_cursor(event.pos())
shift_is_pressed = (event.modifiers() == Qt.ShiftModifier)
# Determine if cursor is near to the center
self.moving = (geometry.distance2_qt(self.mass_center, event.pos()) <= 16)
# Determine if cursor is near to a point
if self.point_edited is None:
if self.moving and shift_is_pressed:
# Erase the whole roi
self.scene().ROIs.remove(self)
self.scene().removeItem(self)
# Determine if cursor is near to a segment
add_point_in_segment_n = self.near_segment(event.pos())
if add_point_in_segment_n is not None:
pol = self.polygon()
pol.insert(add_point_in_segment_n, event.pos())
self.setPolygon(pol)
self.set_outer_polygon()
self.update()
self.point_edited = add_point_in_segment_n
self.setCursor(QCursor(Qt.SizeAllCursor))
else:
if shift_is_pressed:
pol = self.polygon()
pol.remove(self.point_edited)
self.setPolygon(pol)
self.set_outer_polygon()
self.update()
self.setCursor(self.DEFAULT_CURSOR)
super(RoiPol, self).mousePressEvent(event)
def mousePressEvent(self, event):
self.point_edited = self.point_at_cursor(event.pos())
shift_is_pressed = (event.modifiers() == Qt.ShiftModifier)
# Determine if cursor is near to the center
self.moving = (geometry.distance2_qt(self.mass_center, event.pos()) <=
16)
# Determine if cursor is near to a point
if self.moving and shift_is_pressed:
# Erase the whole roi
self.scene().ROIs.remove(self)
self.scene().removeItem(self)
super(RoiCirc, self).mousePressEvent(event)
def hoverMoveEvent(self, event):
if self.is_editing() and self.isSelected():
shift_is_pressed = (event.modifiers() == Qt.ShiftModifier)
near_center = (geometry.distance2_qt(self.mass_center, event.pos())
<= 9)
near_vertex = self.point_at_cursor(event.pos())
if near_center or near_vertex:
if near_center and shift_is_pressed:
self.setCursor(QCursor(self.DEL_POINT_CURSOR))
else:
self.setCursor(QCursor(Qt.SizeAllCursor))
else:
self.setCursor(self.DEFAULT_CURSOR)
def point_at_cursor(self, point):
for p in self.polygon():
if geometry.distance2_qt(point, p) <= 16:
return self.polygon().indexOf(p)
return None
def point_at_cursor(self, point):
r = self.boundingRect()
p = r.bottomRight()
return geometry.distance2_qt(point, p) <= 16