private static void DragStart(UIElement source)
{
_isDragging = true;
FrameworkElement sourceElement = _dragSource.SourceElement;
sourceElement.PreviewDragEnter += _dragSource.PreviewDragEnterHandler;
sourceElement.PreviewDragOver += _dragSource.PreviewDragOverHandler;
sourceElement.PreviewDragLeave += _dragSource.PreviewDragLeaveHandler;
DragInitializeEventArgs args = new DragInitializeEventArgs
{
DragStartPosition = DragStartPosition
};
OnDragInitialize(source, args);
if (args.Data != null)
{
DragDropEffects effects = System.Windows.DragDrop.DoDragDrop(source, args.Data, DragDropEffects.All);
DropCompletedEventArgs dropCompletedArgs = new DropCompletedEventArgs(DragDrop.DropCompletedEvent, effects, args.Data);
OnDropCompleted(source, dropCompletedArgs);
}
sourceElement.PreviewDragEnter -= _dragSource.PreviewDragEnterHandler;
sourceElement.PreviewDragOver -= _dragSource.PreviewDragOverHandler;
sourceElement.PreviewDragLeave -= _dragSource.PreviewDragLeaveHandler;
FinalizeDrag();
}
private void AssociatedObject_DropCompleted(object sender, DropCompletedEventArgs e)
{
if (_dragVisual != null)
{
_dragVisual.Destroy();
_dragVisual = null;
}
}
private static void OnDropCompleted(UIElement element, DropCompletedEventArgs e)
{
element.RaiseEvent(e);
if (_dragSource != null)
{
_dragSource.DropCompletedHandler?.Invoke(element, e);
}
if (_dragContextInfo != null)
{
_dragContextInfo.DropCompletedHandler?.Invoke(element, e);
}
}
private void OnDropComplete(object sender, DropCompletedEventArgs e)
{
}
private void AssociatedObject_OnDropComplete(object sender, DropCompletedEventArgs e)
{
_isMouseDown = false;
}
