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21 
22 
23 
24 #ifndef FORMS_WINDOWSTATEGUARD_HXX
25 #define FORMS_WINDOWSTATEGUARD_HXX
26 
27 /** === begin UNO includes === **/
28 #include <com/sun/star/awt/XWindow2.hpp>
29 #include <com/sun/star/awt/XControlModel.hpp>
30 /** === end UNO includes === **/
31 #include <rtl/ref.hxx>
32 
33 //........................................................................
34 namespace frm
35 {
36 //........................................................................
37 
38 	//====================================================================
39 	//= WindowStateGuard
40 	//====================================================================
41     class WindowStateGuard_Impl;
42 
43     /** a helper class which monitors certain states of an XWindow2, and ensures
44         that they're consistent with respective properties at an XModel.
45 
46         For form controls, window states - such as "Enabled" - can be set by various
47         means. You can set the respective control model property, you can directly manipulate
48         the XWindow2, or the state can change implicitly due to VCL actions. In any case,
49         we need to ensure that the state does not contradict the model property "too much".
50 
51         As an example, consider a form control which, according to its model's property, is disabled.
52         Now when the parent VCL window of the control's VCL window is enabled, then the the control's
53         window is enabled, too - which contradicts the model property.
54 
55         A WindowStateGuard helps you preventing such inconsistent states.
56 
57         The class is not threadsafe.
58     */
59 	class WindowStateGuard
60 	{
61     private:
62         ::rtl::Reference< WindowStateGuard_Impl >   m_pImpl;
63 
64     public:
65         WindowStateGuard();
66         ~WindowStateGuard();
67 
68         void    attach(
69             const ::com::sun::star::uno::Reference< ::com::sun::star::awt::XWindow2 >& _rxWindow,
70             const ::com::sun::star::uno::Reference< ::com::sun::star::awt::XControlModel >& _rxModel
71         );
72 	};
73 
74 //........................................................................
75 } // namespace frm
76 //........................................................................
77 
78 #endif // FORMS_WINDOWSTATEGUARD_HXX
79 
80