/// <summary>
/// Starts a drag.
/// It creates a bitmap of the view being dragged. That bitmap is what you see moving.
/// The actual view can be repositioned if that is what the onDrop handle chooses to do.
/// </summary>
/// <param name="v"> The view that is being dragged </param>
/// <param name="source"> An object representing where the drag originated </param>
/// <param name="dragInfo"> The data associated with the object that is being dragged </param>
/// <param name="dragAction"> The drag action: either <seealso cref="#DRAG_ACTION_MOVE"/> or
/// <seealso cref="#DRAG_ACTION_COPY"/> </param>
public void StartDrag(View v, IDragSource source, object dragInfo, int dragAction)
{
// Start dragging, but only if the source has something to drag.
bool doDrag = source.AllowDrag();
if (!doDrag)
{
return;
}
mOriginator = v;
Bitmap b = GetViewBitmap(v);
if (b == null)
{
// out of memory?
return;
}
int[] loc = mCoordinatesTemp;
v.GetLocationOnScreen(loc);
int screenX = loc[0];
int screenY = loc[1];
StartDrag(b, screenX, screenY, 0, 0, b.Width, b.Height, source, dragInfo, dragAction);
b.Recycle();
if (dragAction == DRAG_ACTION_MOVE)
{
v.Visibility = ViewStates.Gone;
}
}