/// <summary>
/// Event raised while the user is dragging a node.
/// </summary>
private void NodeItem_Dragging(object source, NodeDraggingEventArgs e)
{
e.Handled = true;
//
// Cache the NodeItem for each selected node whilst dragging is in progress.
//
if (this.cachedSelectedNodeItems == null)
{
this.cachedSelectedNodeItems = new List<NodeItem>();
foreach (var selectedNode in this.SelectedNodes)
{
NodeItem nodeItem = FindAssociatedNodeItem(selectedNode);
if (nodeItem == null)
{
throw new ApplicationException("Unexpected code path!");
}
this.cachedSelectedNodeItems.Add(nodeItem);
}
}
//
// Update the position of the node within the Canvas.
//
foreach (var nodeItem in this.cachedSelectedNodeItems)
{
nodeItem.X += e.HorizontalChange;
nodeItem.Y += e.VerticalChange;
}
var eventArgs = new NodeDraggingEventArgs(NodeDraggingEvent, this, this.SelectedNodes, e.HorizontalChange, e.VerticalChange);
RaiseEvent(eventArgs);
}
/// <summary>
/// Event raised while the user is dragging a node.
/// </summary>
private void NodeItem_Dragging(object source, NodeDraggingEventArgs e)
{
e.Handled = true;
//
// Cache the NodeItem for each selected node whilst dragging is in progress.
//
if (this.cachedSelectedNodeItems == null)
{
this.cachedSelectedNodeItems = new List <NodeItem>();
foreach (var selectedNode in this.SelectedNodes)
{
NodeItem nodeItem = FindAssociatedNodeItem(selectedNode);
if (nodeItem == null)
{
throw new ApplicationException("Unexpected code path!");
}
this.cachedSelectedNodeItems.Add(nodeItem);
}
}
//
// Update the position of the node within the Canvas.
//
foreach (var nodeItem in this.cachedSelectedNodeItems)
{
nodeItem.X += e.HorizontalChange;
nodeItem.Y += e.VerticalChange;
}
var eventArgs = new NodeDraggingEventArgs(NodeDraggingEvent, this, this.SelectedNodes, e.HorizontalChange, e.VerticalChange);
RaiseEvent(eventArgs);
}
