1/* 2 * Copyright 2006, Haiku, Inc. All rights reserved. 3 * Distributed under the terms of the MIT License. 4 */ 5#ifndef _LAYOUT_CONTEXT_H 6#define _LAYOUT_CONTEXT_H 7 8#include <List.h> 9 10class BLayoutContext; 11 12 13class BLayoutContextListener { 14public: 15 BLayoutContextListener(); 16 virtual ~BLayoutContextListener(); 17 18 virtual void LayoutContextLeft(BLayoutContext* context) = 0; 19 20private: 21 virtual void _ReservedLayoutContextListener1(); 22 virtual void _ReservedLayoutContextListener2(); 23 virtual void _ReservedLayoutContextListener3(); 24 virtual void _ReservedLayoutContextListener4(); 25 virtual void _ReservedLayoutContextListener5(); 26 27 uint32 _reserved[3]; 28}; 29 30 31class BLayoutContext { 32public: 33 BLayoutContext(); 34 ~BLayoutContext(); 35 36 void AddListener(BLayoutContextListener* listener); 37 void RemoveListener( 38 BLayoutContextListener* listener); 39 40private: 41 BList fListeners; 42 uint32 _reserved[5]; 43}; 44 45#endif // _LAYOUT_CONTEXT_H 46