/// <summary>
/// Occurs when the left mouse button is released.
/// </summary>
/// <param name="sender">Drag source.</param>
/// <param name="e">MouseButtonEventArgs</param>
private static void DragSourcePreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (s_DragController != null)
{
s_DragController.CancelDrag();
s_DragController = null;
}
}
/// <summary>
/// Occurs when the left mouse button is clicked over a drag source.
/// </summary>
/// <param name="sender">Drag source.</param>
/// <param name="e">MouseButtonEventArgs</param>
private static void DragSourcePreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (s_DragController == null && (Mouse.Captured == null || Mouse.Captured == sender))
{
var element = sender as UIElement;
if (element != null)
{
var dragElement = e.OriginalSource as UIElement;
if (dragElement != null)
{
s_DragController = GetDragController(element) ?? new DragController();
s_DragController.DragSource = element;
s_DragController.StartPosition = element.RealMousePosition();//e.GetPosition (element);
s_DragController.OriginalDragElement = dragElement;
s_DragController.OriginalDragElementType = dragElement.GetType().ToString();
s_DragController.DragCompleted += delegate { s_DragController = null; };
}
}
}
}
/// <summary>
/// Sets the drag controller for a drag and drop operation.
/// </summary>
/// <param name="target">UI Element to set controller for.</param>
/// <param name="value">Drag controller to use.</param>
public static void SetDragController(UIElement target, DragController value)
{
target.SetValue(DragControllerProperty, value);
}