public static void OnDragOver(TreeViewItemEx tvItem, DragEventArgs e)
{
//System.Diagnostics.Debug.WriteLine($"DragOver: {tvItem.Item}");
if (dropInfo != null && dropInfo.CouldHadleDrop(e))
{
dropInfo.UpdateInsertPosition(e);
dropInfo.UpdateTargetCollectionAndIndex();
if (dropInfo.CanAcceptData(DropInfo.ExtractDropData(dragInfo, e)))
{
if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
{
e.Effects = DragDropEffects.Copy;
}
else
{
e.Effects = DragDropEffects.Move;
}
}
else
{
e.Effects = DragDropEffects.None;
}
dropInfo.Effects = e.Effects;
e.Handled = true;
}
}
public static void HandleDropForTarget(DragDropEffects result, DragEventArgs e = null)
{
System.Diagnostics.Debug.WriteLine($"HandleDropForTarget: {dropInfo.TargetItem.Item}");
IEnumerable <CmdBase> data = DropInfo.ExtractDropData(dragInfo, e);
if (dropInfo.CanAcceptData(data) &&
(result.HasFlag(DragDropEffects.Move) || result.HasFlag(DragDropEffects.Copy)))
{
var idx = dropInfo.InsertIndex;
if (result.HasFlag(DragDropEffects.Copy))
{
data = data.Select(cmd => cmd.Copy());
}
var dataList = data.ToList();
var souldDeselctItem = dropInfo.InsertPosition.HasFlag(DropInfo.RelativInsertPosition.IntoTargetItem) &&
dropInfo.TargetItem.Item is CmdContainer con &&
!con.IsExpanded;
if (dataList.Count > 0)
{
ToolWindowHistory.SaveState();
}
foreach (var sourceItem in dataList)
{
if (souldDeselctItem)
{
sourceItem.IsSelected = false;
}
dropInfo.TargetContainer.Insert(idx++, sourceItem);
}
var focusItem = dragInfo?.DirectSourceItem ?? dataList.FirstOrDefault();
var selectItemCommand = dropInfo.TargetItem.ParentTreeView.SelectItemCommand;
if (souldDeselctItem)
{
selectItemCommand.SafeExecute(dropInfo.TargetItem.Item);
}
else if (selectItemCommand.SafeExecute(focusItem))
{
foreach (var sourceItem in dataList)
{
sourceItem.IsSelected = true;
}
}
}
else
{
if (e != null)
{
e.Effects = DragDropEffects.None;
}
}
dropInfo?.DropTargetAdorner?.Detach();
dropInfo = null;
}
public static void OnDragOver(TreeViewItemEx tvItem, DragEventArgs e)
{
//System.Diagnostics.Debug.WriteLine($"DragOver: {tvItem.Item}");
if (dropInfo == null)
{
dropInfo = new DropInfo();
}
if (dropInfo.CouldHadleDrop(e))
{
// set the target item, this also initializes the DropTargetAdorner
dropInfo.TargetItem = tvItem;
// update data related to the current mouse position and the target item
dropInfo.UpdateInsertPosition(e);
dropInfo.UpdateTargetContainerAndIndex();
// set the drop mode Copy|Move|None
if (dropInfo.CanAcceptData(DropInfo.ExtractDropData(dragInfo, e)))
{
if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
{
e.Effects = DragDropEffects.Copy;
}
else
{
e.Effects = DragDropEffects.Move;
}
}
else
{
e.Effects = DragDropEffects.None;
}
// this controls the adorner
dropInfo.Effects = e.Effects;
e.Handled = true;
}
}