public void SetMouseCursor(uint nodeId, NodePart nodePart, int index, ModifierKeys modifiers, bool isMouseButtonDown, double x, double y)
{
if (0 == nodeId)
{
// When the UI calls this method, we are only expecting two possible
// value ranges for 'nodeId': a "uint.MaxValue" when the 'nodeId' is
// invalid, or a positive number. This should not be zero, if it is,
// do let me know. - Ben.
throw new ArgumentException("121B20BE: Invalid argument!", "nodeId");
}
if (currentDragState == DragState.NodeRepositioning)
{
if (!isMouseButtonDown)
{
return;
}
foreach (DraggedNode draggedNode in dragSet)
{
if (visualHost != null)
{
VisualNode node = (VisualNode)draggedNode.node;
DrawingVisual visual = visualHost.GetDrawingVisualForNode(node.NodeId);
TranslateTransform transform = visual.Transform as TranslateTransform;
transform.X = x - draggedNode.DeltaX;
transform.Y = y - draggedNode.DeltaY;
node.X = transform.X;
node.Y = transform.Y;
this.TransformBubble(node, transform);
}
}
edgeController.UpdateSelectedEdges();
selectionBox.UpdateSelectionBox(x, y);
}
else if ((currentDragState == DragState.CurveDrawing) || (currentDragState == DragState.EdgeReconnection))
{
if (nodePart != NodePart.None && nodeId == uint.MaxValue)
{
throw new InvalidOperationException("Nodepard and NodeId are not in consistent (914C54A64BFD)");
}
VisualNode node = null;
edgeConnection = EdgeConnectionFlag.None;
if (nodePart != NodePart.None)
{
node = GetVisualNode(nodeId);
}
else
{
if (lastHoveredNodeId != uint.MaxValue && lastHoveredNodeId != edgeController.GetCurrentlySelectedNodeId())
{
node = GetVisualNode(lastHoveredNodeId);
node.PreviewSelected = node.Selected;//reset the original state of the node
RearrangeNodeAndBubbleVisual(node, false);
}
}
//verification
List <IVisualNode> nodeToModify;
edgeConnection = edgeController.AttemptConnectEdge(node, nodePart, index, out nodeToModify);
if (nodePart != NodePart.None)
{
if ((edgeConnection == EdgeConnectionFlag.NewEdge || edgeConnection == EdgeConnectionFlag.ReconnectEdge) &&
(nodePart == NodePart.InputSlot || nodePart == NodePart.InputLabel || nodePart == NodePart.ReplicationGuide))
{
node.SetHoveredIndex(index);
}
node.PreviewSelected = true;
RearrangeNodeAndBubbleVisual(node, true);
}
if (edgeConnection != EdgeConnectionFlag.None && edgeConnection != EdgeConnectionFlag.Illegal)
{
edgeController.DrawConnectingEdgeTo();
}
else
{
edgeController.DrawConnectingEdgeTo(new Point(x, y));
}
lastHoveredNodeId = nodeId;
if (null != node)
{
node.Compose(); // Optionally redraw the node.
}
}
}
