private void TreeViewExplorer_MouseMove(object sender, MouseEventArgs e)
{
TreeViewItem item = TreeViewExtensions.GetNearestContainer(e.OriginalSource as UIElement);
if ((e.LeftButton == MouseButtonState.Pressed) && (item != null))
{
var mousePos = e.GetPosition(null);
var diff = startPoint - mousePos;
if (Math.Abs(diff.X) > SystemParameters.MinimumHorizontalDragDistance ||
Math.Abs(diff.Y) > SystemParameters.MinimumVerticalDragDistance)
{
if (selectedItems.Count != 0)
{
List <ProjectElementBase> elements = new List <ProjectElementBase>();
foreach (TreeViewItem i in selectedItems)
{
if (i != null)
{
ProjectElementBase elem = i.Tag as ProjectElementBase;
elements.Add(elem);
}
}
if (ClipboardBufferData.CheckGroupValid(elements) != GroupType.IllegalGroup)
{
var dragData = new DataObject(new ClipboardBufferData(ClipboardOperationType.Cut, elements));
DragDrop.DoDragDrop(TreeViewExplorer, dragData, DragDropEffects.Move | DragDropEffects.None);
}
}
}
}
}
private void Copy_CanExecute(object sender, CanExecuteRoutedEventArgs e)
{
if (selectedItems.Count != 0)
{
List <ProjectElementBase> elements = new List <ProjectElementBase>();
foreach (TreeViewItem i in selectedItems)
{
if (i != null)
{
ProjectElementBase elem = i.Tag as ProjectElementBase;
elements.Add(elem);
}
}
e.CanExecute = (ClipboardBufferData.CheckGroupValid(elements) != GroupType.IllegalGroup);
foreach (TreeViewItem i in selectedItems)
{
if (i != null)
{
ProjectElementBase elem = i.Tag as ProjectElementBase;
elem.Copy_CanExecute(sender, e);
}
}
}
}