private void treeView_MouseMove(object sender, MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
if (DropAdapter == null)
{
return;
}
if (!(e.Source is BaseTreeView))
{
return;
}
if (treeView.SelectedItem == null)
{
return;
}
TreeNavigationItem selectedTreeNavigationItem = treeView.SelectedItem as TreeNavigationItem;
if (!DropAdapter.DragStart(e, selectedTreeNavigationItem))
{
return;
}
TreeViewItem treeViewItem = GetTreeViewItemAt(e.GetPosition(treeView));
//_dragAdorner = new DragAdorner(treeViewItem, treeViewItem.DesiredSize, e.GetPosition(treeView));
DragDrop.DoDragDrop(treeView, treeView.SelectedItem, DragDropEffects.All);
//_dragAdorner.Detach();
}
}
private void treeView_Drop(object sender, DragEventArgs e)
{
if (DropAdapter == null)
{
return;
}
TreeNavigationItem targetTreeNavigationItem = GetTreeNavigationItemAt(e.GetPosition(treeView));
TreeNavigationItem draggedTreeNavigationItem = GetDataFromDragEventArgs(e);
DropAdapter.Drop(e, draggedTreeNavigationItem, targetTreeNavigationItem);
}
private void treeView_DragOver(object sender, DragEventArgs e)
{
if (DropAdapter == null)
{
return;
}
TreeNavigationItem targetTreeNavigationItem = GetTreeNavigationItemAt(e.GetPosition(treeView));
TreeNavigationItem draggedTreeNavigationItem = GetDataFromDragEventArgs(e);
// _dragAdorner.UpdatePosition(e.GetPosition(treeView));
DropAdapter.DragOver(e, draggedTreeNavigationItem, targetTreeNavigationItem);
e.Handled = true;
}