private static void UpdateHoveredControl(Base control, int x, int y) { // // We use this global variable to represent our hovered control // That way, if the new hovered control gets deleted in one of the // Hover callbacks, we won't be left with a hanging pointer. // This isn't ideal - but it's minimal. // m_NewHoveredControl = control; // Nothing to change.. if (HoveredControl == m_NewHoveredControl) return; // We changed - tell the old hovered control that it's no longer hovered. if (HoveredControl != null && HoveredControl != m_NewHoveredControl) HoveredControl.DragAndDrop_HoverLeave(CurrentPackage); // If we're hovering where the control came from, just forget it. // By changing it to null here we're not going to show any error cursors // it will just do nothing if you drop it. if (m_NewHoveredControl == SourceControl) m_NewHoveredControl = null; // Check to see if the new potential control can accept this type of package. // If not, ignore it and show an error cursor. while (m_NewHoveredControl != null && !m_NewHoveredControl.DragAndDrop_CanAcceptPackage(CurrentPackage)) { // We can't drop on this control, so lets try to drop // onto its parent.. m_NewHoveredControl = m_NewHoveredControl.Parent; // Its parents are dead. We can't drop it here. // Show the NO WAY cursor. if (m_NewHoveredControl == null) { Platform.Neutral.SetCursor(Cursors.No); } } // Become out new hovered control HoveredControl = m_NewHoveredControl; // If we exist, tell us that we've started hovering. if (HoveredControl != null) { HoveredControl.DragAndDrop_HoverEnter(CurrentPackage, x, y); } m_NewHoveredControl = null; }