void DiagramsListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
ObservableDiagramLibraryNode selectedNode = VM.SelectedNode;
if (null != selectedNode)
{
foreach (object item in e.AddedItems)
{
ObservableDiagram od = item as ObservableDiagram;
selectedNode.SelectedDiagrams.Add(od);
}
foreach (object item in e.RemovedItems)
{
ObservableDiagram od = item as ObservableDiagram;
selectedNode.SelectedDiagrams.Remove(od);
}
}
}
public static void DiagramLibraryNodeToDragDrop(DependencyObject dragSource, ObservableDiagramLibraryNode diagramLibraryNode, bool useSelectedDiagrams)
{
if (null == dragSource)
{
throw new ArgumentNullException(nameof(dragSource));
}
if (null == diagramLibraryNode)
{
throw new ArgumentNullException(nameof(diagramLibraryNode));
}
DataObject data = new DataObject();
data.SetData(typeof(ObservableDiagramLibraryNode), diagramLibraryNode);
data.SetData(UseSelectedDiagramsFormat, useSelectedDiagrams);
if (useSelectedDiagrams && diagramLibraryNode.SelectedDiagrams.Count > 0)
{
AddImageFormats(data, diagramLibraryNode.SelectedDiagrams[0], 1.0f);
}
DragDrop.DoDragDrop(dragSource, data, DragDropEffects.Copy | DragDropEffects.Move);
}
public static void DragDropToDiagramLibraryNode(IDataObject data, ObservableDiagramLibraryNode destinationNode, DiagramLibraryNodeDragDropAction dragDropAction)
{
if (null == data)
{
throw new ArgumentNullException(nameof(data));
}
if (data.GetDataPresent(typeof(ObservableDiagramLibraryNode)) && data.GetData(typeof(ObservableDiagramLibraryNode)) is ObservableDiagramLibraryNode sourceNode)
{
bool useSelectedDiagrams = data.GetData(UseSelectedDiagramsFormat) as bool? ?? false;
if (sourceNode == destinationNode)
{
if (dragDropAction == DiagramLibraryNodeDragDropAction.Copy)
{
if (useSelectedDiagrams)
{
// Cloning diagrams within the same collection
if (useSelectedDiagrams && sourceNode.CloneSelected.CanExecute(null))
{
sourceNode.CloneSelected.Execute(null);
}
}
}
}
else
{
if (dragDropAction == DiagramLibraryNodeDragDropAction.Copy)
{
if (useSelectedDiagrams)
{
// Copy selected diagrams into the destination
if (sourceNode.CopySelected.CanExecute(destinationNode?.Name))
{
sourceNode.CopySelected.Execute(destinationNode?.Name);
}
}
else
{
// Copy all diagrams into the destination
if (sourceNode.CopyNode.CanExecute(null))
{
sourceNode.CopyNode.Execute(destinationNode?.Name);
}
}
}
else if (dragDropAction == DiagramLibraryNodeDragDropAction.Move)
{
if (useSelectedDiagrams)
{
// Move all selected diagrams into the destination
if (sourceNode.MoveSelected.CanExecute(destinationNode?.Name))
{
sourceNode.MoveSelected.Execute(destinationNode?.Name);
}
}
else
{
// Move all diagrams into the destination (merge)
if (sourceNode.MergeNode.CanExecute(null))
{
sourceNode.MergeNode.Execute(destinationNode?.Name);
}
}
}
}
}
}
