private void DragSource_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
this.sourceItemsControl = (ItemsControl)sender;
TreeListView tlv = (TreeListView)this.sourceItemsControl;
this.topWindow = (Window)DranDropUtilities.FindAncestor(typeof(Window), this.sourceItemsControl);
this.initialMousePosition = e.GetPosition(this.topWindow);
Visual visual = e.OriginalSource as Visual;
this.sourceItemContainer = DranDropUtilities.GetItemContainer(this.sourceItemsControl, visual);
if (this.sourceItemContainer != null)
{
this.draggedData = sourceItemContainer.DataContext;
}
}
private void DecideDropTarget(DragEventArgs e)
{
int targetItemsControlCount = this.targetItemsControl.Items.Count;
object draggedItem = e.Data.GetData(this.format.Name);
Visual visual = e.OriginalSource as Visual;
targetOverItem = DranDropUtilities.FindAncestor(typeof(TreeListViewItem), visual) as TreeListViewItem;
if (targetOverItem == null)
{
this.targetItemContainer = null;
this.insertionIndex = -1;
e.Effects = DragDropEffects.None;
return;
}
bool newDragOverNote = false;
OutlinerNote dragOverNote = null;
if (targetOverItem != null)
{
dragOverNote = targetOverItem.DataContext as OutlinerNote;
if (dragOverNote != null)
{
if (__DragOverNote != dragOverNote)
{
if (__DragOverNote != null)
{
__DragOverNote.DragOverNote = false;
}
newDragOverNote = true;
}
}
}
ItemsControl parentItemsControl = targetOverItem.ParentItemsControl;
if (parentItemsControl == null)
{
this.targetItemContainer = null;
this.insertionIndex = -1;
e.Effects = DragDropEffects.None;
return;
}
if (targetItemsControlCount > 0)
{
this.hasVerticalOrientation = DranDropUtilities.HasVerticalOrientation(this.targetItemsControl.ItemContainerGenerator.ContainerFromIndex(0) as FrameworkElement);
this.targetItemContainer = parentItemsControl;
this.insertionIndex = parentItemsControl.ItemContainerGenerator.IndexFromContainer(targetOverItem);
if (this.insertionIndex == -1)
{
this.targetItemContainer = null;
this.insertionIndex = -1;
e.Effects = DragDropEffects.None;
return;
}
if (IsParent(this.targetItemContainer as TreeListViewItem, this.sourceItemContainer))
{
this.targetItemContainer = null;
this.insertionIndex = -1;
e.Effects = DragDropEffects.None;
return;
}
if (newDragOverNote && dragOverNote != null)
{
dragOverNote.DragOverNote = true;
__DragOverNote = dragOverNote;
}
}
else
{
this.targetItemContainer = null;
this.insertionIndex = 0;
}
}
// DragSource
public static MainWindow GetMainWindow(Visual visual)
{
return(DranDropUtilities.FindAncestor(typeof(Window), visual) as MainWindow);
}
