def itemChange(self, change, value):
# Move selected nodes and edges to the front, untill unselected
if change == QGraphicsItem.ItemSelectedChange:
if QGraphicsItem.isSelected(self):
#Unselected (since the flag is not updated yet)
self.setZValue(0)
self.setZValueEdges(1)
else:
#Selected
self.setZValue(4)
self.setZValueEdges(5)
#If the position of the node changes -> calculate position change
#and move edges with the node
newPos = value
if change == QGraphicsItem.ItemPositionChange:
if self.snappingIsOn:
newPos = self.snapToGrid(newPos)
posChange = newPos - self.lastPos
# Due to the grid snapping, only process when node actually moved
if not posChange.isNull():
self.moveEdges(posChange)
self.lastPos = newPos
self.widget.editNodePosition(self.nodeName, newPos)
return super(Node, self).itemChange(change, newPos)
def paintNodeBody(self, painter, lod):
painter.setPen(Qt.black)
#Subtle gradient
if lod > 0.2:
gradient = QLinearGradient(0, 0, self.nodeBodyWidth,
self.nodeBodyHeight)
gradient.setColorAt(0, self.nodeBodyColor)
gradient.setColorAt(1, self.nodeBodyColorGradient)
brush = QBrush(gradient)
else:
brush = QBrush(self.nodeBodyColor)
if self.hover:
brush = QBrush(self.nodeBodyColorHover)
if QGraphicsItem.isSelected(self):
brush = QBrush(self.nodeBodyColorSelected)
painter.setBrush(brush)
if lod > 0.1:
painter.drawRoundedRect(0, 0, self.nodeBodyWidth,
self.nodeBodyHeight, 10, 5)
else:
painter.drawRect(0, 0, self.nodeBodyWidth, self.nodeBodyHeight)
def itemChange(self, change, value):
# Move selected nodes and edges to the front, untill unselected
if change == QGraphicsItem.ItemSelectedChange:
if QGraphicsItem.isSelected(self):
#Unselected (since the flag is not updated yet)
self.setZValue(0)
self.setZValueEdges(1)
else:
#Selected
self.setZValue(4)
self.setZValueEdges(5)
#If the position of the node changes -> calculate position change
#and move edges with the node
newPos = value
if change == QGraphicsItem.ItemPositionChange:
if self.snappingIsOn:
newPos = self.snapToGrid(newPos)
posChange = newPos - self.lastPos
# Due to the grid snapping, only process when node actually moved
if not posChange.isNull():
self.moveEdges(posChange)
self.lastPos = newPos
self.widget.editNodePosition(self.nodeName, newPos)
return super(Node, self).itemChange(change, newPos)
def hoverMoveEvent(self, event):
#Don't execute when the nodeBody is selected in order to prevent unselecting the nodeBody
if not QGraphicsItem.isSelected(self):
self.mouseIsOnIO(event.pos())
super().hoverMoveEvent(event)
self.update()
#Must be done after super().mousePressEvent(event) in order to
#flag the node again after clicking on an input/output
self.setFlag(QGraphicsItem.ItemIsSelectable, True)
self.setFlag(QGraphicsItem.ItemIsMovable, True)
def hoverMoveEvent(self, event):
#Don't execute when the nodeBody is selected in order to prevent unselecting the nodeBody
if not QGraphicsItem.isSelected(self):
self.mouseIsOnIO(event.pos())
super().hoverMoveEvent(event)
self.update()
#Must be done after super().mousePressEvent(event) in order to
#flag the node again after clicking on an input/output
self.setFlag(QGraphicsItem.ItemIsSelectable, True)
self.setFlag(QGraphicsItem.ItemIsMovable, True)
def paintEdge(self, painter, lod):
pen = QPen(Qt.black)
pen.setWidth(1)
pen.setCapStyle(Qt.RoundCap)
brush = QBrush(self.edgeColor)
if self.hover:
#pen.setColor(self.edgeColorHover)
brush.setColor(self.edgeColorHover)
if QGraphicsItem.isSelected(self):
#pen.setColor(self.edgeColorSelected)
brush.setColor(self.edgeColorSelected)
painter.setPen(pen)
painter.setBrush(brush)
edgePath = self.getEdgePath()
edgePath = edgePath.simplified()
painter.drawPath(edgePath)
def paintNodeBody(self, painter, lod):
painter.setPen(schemastyle.NODE_BACKGROUND_COLOR)
brush = QBrush(schemastyle.NODE_BACKGROUND_COLOR)
if self.hover:
brush = QBrush(schemastyle.NODE_BACKGROUND_COLOR)
if QGraphicsItem.isSelected(self):
brush = QBrush(schemastyle.NODE_BACKGROUND_COLOR)
painter.setBrush(brush)
if lod > 0.1:
painter.setPen(schemastyle.NODE_SHADOW_COLOR)
painter.setBrush(QBrush(schemastyle.NODE_SHADOW_COLOR))
painter.drawRoundedRect(3, 3, self.nodeBodyWidth,
self.nodeBodyHeight, 5, 5)
painter.setPen(schemastyle.NODE_BACKGROUND_COLOR)
painter.setBrush(QBrush(schemastyle.NODE_BACKGROUND_COLOR))
painter.drawRoundedRect(0, 0, self.nodeBodyWidth,
self.nodeBodyHeight, 5, 5)
else:
painter.drawRect(0, 0, self.nodeBodyWidth, self.nodeBodyHeight)
def paintNodeBody(self, painter, lod):
painter.setPen(Qt.black)
#Subtle gradient
if lod > 0.2:
gradient = QLinearGradient(0, 0, self.nodeBodyWidth, self.nodeBodyHeight)
gradient.setColorAt(0, self.nodeBodyColor)
gradient.setColorAt(1, self.nodeBodyColorGradient)
brush = QBrush(gradient)
else:
brush = QBrush(self.nodeBodyColor)
if self.hover:
brush = QBrush(self.nodeBodyColorHover)
if QGraphicsItem.isSelected(self):
brush = QBrush(self.nodeBodyColorSelected)
painter.setBrush(brush)
if lod > 0.1:
painter.drawRoundedRect(0, 0, self.nodeBodyWidth, self.nodeBodyHeight, 10, 5)
else:
painter.drawRect(0, 0, self.nodeBodyWidth, self.nodeBodyHeight)
def paintEdge(self, painter, lod):
pen = QPen(Qt.black)
pen.setWidth(1)
pen.setCapStyle(Qt.RoundCap)
brush = QBrush(self.edgeColor)
if self.hover:
#pen.setColor(self.edgeColorHover)
brush.setColor(self.edgeColorHover)
if QGraphicsItem.isSelected(self):
#pen.setColor(self.edgeColorSelected)
brush.setColor(self.edgeColorSelected)
painter.setPen(pen)
painter.setBrush(brush)
edgePath = self.getEdgePath()
edgePath = edgePath.simplified()
painter.drawPath(edgePath)
if lod > 0.4:
self.drawPCRates(painter)
