internal override void OnMouseMove(MouseEventArgs e)
{
if (CheckOverScrollBar(e.GetPosition(TreeView)))
{
CleanUpAdorners();
return;
}
if (dragPosition.HasValue)
{
var dragDiff = dragPosition.Value - e.GetPosition(TreeView);
if (TreeView.DragCommand != null && (Math.Abs(dragDiff.X) > SystemParameters.MinimumHorizontalDragDistance || Math.Abs(dragDiff.Y) > SystemParameters.MinimumVerticalDragDistance))
{
// begin Drag
var draggableItems = GetDraggableItems(dragPosition.Value);
var canDragParameters = new CanDragParameters(draggableItems, dragPosition.Value, dragButton);
dragPosition = null;
var canDrag = TreeView.DragCommand.CanExecute(canDragParameters);
if (canDrag && draggableItems.Count > 0)
{
var dragParameters = new DragParameters(draggableItems, canDragParameters.Position, canDragParameters.Button);
TreeView.DragCommand.Execute(dragParameters);
DragStart();
DragDrop.DoDragDrop(TreeView, dragParameters.Data, dragParameters.AllowedEffects);
DragEnd();
e.Handled = true;
}
}
}
}
internal override void OnMouseMove(MouseEventArgs e)
{
IsDragging = false;
if (!IsLeftButtonDown || CheckOverScrollBar(e.GetPosition(TreeView)))
{
CleanUpAdorners();
return;
}
if (!CanDrag)
{
return;
}
//drag actually starting?
Point mousePos = e.GetPosition(null);
Vector diff = dragStartPoint - mousePos;
if (e.LeftButton == MouseButtonState.Pressed &&
(Math.Abs(diff.X) > SystemParameters.MinimumHorizontalDragDistance || Math.Abs(diff.Y) > SystemParameters.MinimumVerticalDragDistance))
{
IsDragging = true;
DragContent dragData = new DragContent();
foreach (var item in draggableItems)
{
DragParameters dragParameters = new DragParameters(item);
TreeView.DragCommand.Execute(dragParameters);
dragData.Add(dragParameters.DraggedObject);
}
DragStart(dragData);
DragDo(dragData);
DragEnd();
e.Handled = true;
}
}
