def paint_clip(self, painter, option, widget):
# Clip the node to make it round.
clip = _qt.QPainterPath()
clip.addRoundedRect(
self.x,
self.y,
UI.node.width,
self.height,
UI.node.roundness,
UI.node.roundness,
)
painter.setClipping(True)
painter.setClipPath(clip)
painter.setPen(_qtcore.Qt.NoPen)
def paint_highlight(self, painter, option, widget):
"""Highlight the node.
Called when the node is selected.
"""
path = _qt.QPainterPath()
path.addRoundedRect(
self.x,
self.y,
UI.node.width,
self.height,
UI.node.roundness,
UI.node.roundness,
)
self.highlighter.setWidth(UI.node.highlight.padding * 2)
outline = self.highlighter.createStroke(path)
color = _qt.QColor(*UI.node.highlight.brush)
painter.fillPath(outline, _qt.QBrush(color))
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))