protected override void CheckItems(System.Collections.IList newItems)
{
foreach (object newItem in newItems)
{
if (!(newItem is DocumentContent))
{
throw new InvalidOperationException("FloatingDocumentPane can contain only DocumentContents!");
}
}
if (Items.Count == 0 && FloatingWindow != null)
{
FloatingWindow.Close(true);
}
}
public void StartDrag(FloatingWindow wnd, Point point, Point offset)
{
Debug.Assert(!IsDragging);
IsDragging = true;
Offset = offset;
_wnd = wnd;
if (Offset.X >= _wnd.Width)
{
Offset.X = _wnd.Width / 2;
}
_wnd.Left = point.X - Offset.X;
_wnd.Top = point.Y - Offset.Y;
_wnd.Show();
int surfaceCount = 0;
restart:
surfaceCount = Surfaces.Count;
foreach (IDropSurface surface in Surfaces)
{
if (surface.SurfaceRectangle.Contains(point))
{
SurfacesWithDragOver.Add(surface);
surface.OnDragEnter(point);
Debug.WriteLine("Enter " + surface.ToString());
if (surfaceCount != Surfaces.Count)
{
//Surfaces list has been changed restart cycle
SurfacesWithDragOver.Clear();
goto restart;
}
}
}
}
