protected override void OnPreviewMouseMove(MouseEventArgs e)
{
base.OnPreviewMouseMove(e);
if (!EnableSortByDragAndDrop)
{
return;
}
if (_targetContainer?.DataContext == null)
{
return;
}
var listBoxItem = _targetContainer as ListBoxItem;
if (listBoxItem != null && !listBoxItem.IsSelected)
{
return;
}
// 移動量が十分か検証する
var currentPosition = PointToScreen(e.GetPosition(_targetContainer));
var delta = (_startPosition - currentPosition);
if (!delta.IsEnoughMoveForDrug())
{
return;
}
//Debug.WriteLine("DragDropStart");
_dragAdorner = _dragAdorner ?? (_dragAdorner = DragAdorner.Create(this, _targetContainer, _startPosition));
_dragAdorner.SetOffset(currentPosition.X, currentPosition.Y);
DragDrop.DoDragDrop(this, _targetContainer.DataContext, DragDropEffects.Move);
// 終わったら後始末
ResetDragAndDropParameter();
}
private void ResetDragAndDropParameter()
{
//Debug.WriteLine("ResetParameter");
_targetContainer = null;
_startPosition = new Point();
_dragAdorner?.Dispose();
_dragAdorner = null;
_insertionAdorner?.Dispose();
_insertionAdorner = null;
}
protected override void OnPreviewMouseMove(MouseEventArgs e)
{
base.OnPreviewMouseMove(e);
if (!EnableSortByDragAndDrop) return;
if (_targetContainer?.DataContext == null) return;
var listBoxItem = _targetContainer as ListBoxItem;
if (listBoxItem != null && !listBoxItem.IsSelected)
return;
// 移動量が十分か検証する
var currentPosition = PointToScreen(e.GetPosition(_targetContainer));
var delta = (_startPosition - currentPosition);
if (!delta.IsEnoughMoveForDrug()) return;
//Debug.WriteLine("DragDropStart");
_dragAdorner = _dragAdorner ?? (_dragAdorner = DragAdorner.Create(this, _targetContainer, _startPosition));
_dragAdorner.SetOffset(currentPosition.X, currentPosition.Y);
DragDrop.DoDragDrop(this, _targetContainer.DataContext, DragDropEffects.Move);
// 終わったら後始末
ResetDragAndDropParameter();
}