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 10 class BLayoutContext; 11 12 13 class BLayoutContextListener { 14 public: 15 BLayoutContextListener(); 16 virtual ~BLayoutContextListener(); 17 18 virtual void LayoutContextLeft(BLayoutContext* context) = 0; 19 }; 20 21 22 class BLayoutContext { 23 public: 24 BLayoutContext(); 25 ~BLayoutContext(); 26 27 void AddListener(BLayoutContextListener* listener); 28 void RemoveListener( 29 BLayoutContextListener* listener); 30 31 private: 32 BList fListeners; 33 }; 34 35 #endif // _LAYOUT_CONTEXT_H 36