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27 
28 #ifndef _CHART2_CHANGINGRESOURCE_HXX
29 #define _CHART2_CHANGINGRESOURCE_HXX
30 
31 //.............................................................................
32 namespace chart
33 {
34 //.............................................................................
35 
36 //-----------------------------------------------------------------------------
37 /**
38 */
39 
40 class ChangingResource;
41 class ResourceChangeListener
42 {
43 public:
44     virtual void stateChanged( ChangingResource* pResource ) = 0;
45     virtual ~ResourceChangeListener();
46 };
47 
48 class ChangingResource
49 {
50 public:
51     ChangingResource();
52     virtual ~ChangingResource();
53 
54     virtual void setChangeListener( ResourceChangeListener* pListener );
55 
56 protected:
57     ResourceChangeListener* m_pChangeListener;
58 };
59 
60 //.............................................................................
61 } //namespace chart
62 //.............................................................................
63 #endif
64