def reset(self):
"""Reset the graphic state to its initial value."""
self.setFlag(_qt.QGraphicsItem.ItemIsMovable)
self.setFlag(_qt.QGraphicsItem.ItemIsSelectable)
self.setFlag(_qt.QGraphicsItem.ItemIsFocusable)
self.resizing = False
self.x = 0
self.y = 0
self.highlighter = _qt.QPainterPathStroker()
self.highlighter.setCapStyle(_qtcore.Qt.RoundCap)
self.resize_handle_size = 10
def compute_path(self):
"""Compute the path of this connection.
The computed path will be drawn between the source_pos and
destination_pos of this connection.
This method requires `BaseConnection.source_pos` and
`BaseConnection.destination_pos` attributes to be set.
Both must be `PySide.QtCore.QPointF` attributes or present
a similar interface (`PySide.QtCore.QPointF.x` and
`PySide.QtCore.QPointF.y` are used in particular).
"""
path = _qt.QPainterPath()
path.moveTo(self.source_pos)
control_x = self.destination_pos.x() - self.source_pos.x()
control_y = self.destination_pos.y() - self.source_pos.y()
control_source = _qtcore.QPointF(
self.source_pos.x() + control_x * .4,
self.source_pos.y() + control_y * 0,
)
control_destination = _qtcore.QPointF(
self.source_pos.x() + control_x * .6,
self.source_pos.y() + control_y * 1,
)
path.cubicTo(
control_source,
control_destination,
self.destination_pos,
)
stroker = _qt.QPainterPathStroker()
stroker.setWidth(UI.connection.thickness)
stroker.setCapStyle(_qtcore.Qt.RoundCap)
self.setPath(stroker.createStroke(path))
