public void RemoveListener(View targetView, DragAndDropEventHandler callback)
{
if (!targetEventDictionary.ContainsKey(targetView))
{
throw new InvalidOperationException("Fail to RemoveListener");
}
InternalDragAndDropEventHandler cb = targetEventDictionary[targetView];
targetEventDictionary.Remove(targetView);
if (!Interop.DragAndDrop.RemoveListener(SwigCPtr, View.getCPtr(targetView),
new global::System.Runtime.InteropServices.HandleRef(this, Marshal.GetFunctionPointerForDelegate <Delegate>(cb))))
{
throw new InvalidOperationException("Fail to RemoveListener");
}
}
public void AddListener(View targetView, DragAndDropEventHandler callback)
{
InternalDragAndDropEventHandler cb = (dragEvent) =>
{
DragType type = (DragType)Interop.DragAndDrop.GetAction(dragEvent);
DragEvent ev = new DragEvent();
global::System.IntPtr cPtr = Interop.DragAndDrop.GetPosition(dragEvent);
ev.Position = (cPtr == global::System.IntPtr.Zero) ? null : new Position(cPtr, false);
if (type == DragType.Enter)
{
ev.DragType = type;
callback(targetView, ev);
}
else if (type == DragType.Leave)
{
ev.DragType = type;
callback(targetView, ev);
}
else if (type == DragType.Move)
{
ev.DragType = type;
callback(targetView, ev);
}
else if (type == DragType.Drop)
{
ev.DragType = type;
ev.MimeType = Interop.DragAndDrop.GetMimeType(dragEvent);
ev.Data = Interop.DragAndDrop.GetData(dragEvent);
callback(targetView, ev);
}
};
targetEventDictionary.Add(targetView, cb);
if (!Interop.DragAndDrop.AddListener(SwigCPtr, View.getCPtr(targetView),
new global::System.Runtime.InteropServices.HandleRef(this, Marshal.GetFunctionPointerForDelegate <Delegate>(cb))))
{
throw new InvalidOperationException("Fail to AddListener");
}
}