public void DoDragDrop(IDataObject dataObject, UIElement dragSource, bool showDragVisual, bool useVisualBrush, DragDropEffects effects)
{
if (!IsDragging)
{
_useDefaultCursor = true;
_dragScope = Application.Current.MainWindow.Content as FrameworkElement;
bool previousDrop = _dragScope.AllowDrop;
_dragScope.AllowDrop = true;
_dragScope.PreviewDragOver += DragScope_PreviewDragOver;
_dragScope.DragOver += DragScope_DragOver;
_dragScope.DragLeave += DragScope_DragLeave;
_dragScope.DragEnter += DragScope_DragEnter;
_dragScope.GiveFeedback += DragSource_GiveFeedback;
_dragScope.QueryContinueDrag += DragScope_QueryContinueDrag;
var _layer = AdornerLayer.GetAdornerLayer(_dragScope);
if (showDragVisual)
{
_dragAdorner = new DragAdorner(_dragScope, dragSource, useVisualBrush);
_layer.Add(_dragAdorner);
}
IsDragging = true;
_dragHasLeftScope = false;
dragSource.CaptureMouse();
DragDropEffects de = System.Windows.DragDrop.DoDragDrop(dragSource, dataObject, effects);
dragSource.ReleaseMouseCapture();
if (_dragAdorner != null)
{
_layer.Remove(_dragAdorner);
_dragAdorner = null;
}
_dragScope.AllowDrop = previousDrop;
_dragScope.GiveFeedback -= DragSource_GiveFeedback;
_dragScope.DragLeave -= DragScope_DragLeave;
_dragScope.DragLeave -= DragScope_DragEnter;
_dragScope.QueryContinueDrag -= DragScope_QueryContinueDrag;
_dragScope.DragOver -= DragScope_DragOver;
_dragScope.PreviewDragOver -= DragScope_PreviewDragOver;
IsDragging = false;
}
}
public void DoDragDropSimulate(IDataObject dataObject, UIElement dragSource, bool showDragVisual, bool useVisualBrush, DragDropEffects effects, Action callback)
{
if (!IsDragging)
{
_dataObject = dataObject;
_callback = callback;
_useDefaultCursor = true;
_dragScope = Application.Current.MainWindow.Content as FrameworkElement;
_previousDrop = _dragScope.AllowDrop;
_dragScope.AllowDrop = true;
_dragScope.PreviewMouseLeftButtonUp += DragScope_PreviewMouseLeftButtonUp;
_dragScope.MouseMove += DragScope_MouseMove;
_dragScope.PreviewKeyDown += DragScope_PreviewKeyDown;
_layer = AdornerLayer.GetAdornerLayer(_dragScope);
if (showDragVisual)
{
_dragAdorner = new DragAdorner(_dragScope, dragSource, useVisualBrush);
_layer.Add(_dragAdorner);
_dragAdorner.UpdatePosition(Mouse.GetPosition(_dragScope), true);
}
_dragSource = dragSource;
IsDragging = true;
_dragHasLeftScope = false;
Mouse.OverrideCursor = Cursors.No;
dragSource.CaptureMouse();
}
}
public void StopDragSimulate(bool cancel)
{
if (IsDragging)
{
if (_callback != null)
_callback();
_dragSource.ReleaseMouseCapture();
if (_dragAdorner != null)
{
_layer.Remove(_dragAdorner);
_dragAdorner = null;
}
_dragScope.PreviewMouseLeftButtonUp -= DragScope_PreviewMouseLeftButtonUp;
_dragScope.MouseMove -= DragScope_MouseMove;
_dragScope.PreviewKeyDown -= DragScope_PreviewKeyDown;
_dragScope.AllowDrop = _previousDrop;
Mouse.OverrideCursor = null;
IsDragging = false;
}
}
