xref: /trunk/main/forms/source/inc/windowstateguard.hxx (revision 7950f2af)

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 * Licensed to the Apache Software Foundation (ASF) under one
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 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
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#ifndef FORMS_WINDOWSTATEGUARD_HXX
#define FORMS_WINDOWSTATEGUARD_HXX

/** === begin UNO includes === **/
#include <com/sun/star/awt/XWindow2.hpp>
#include <com/sun/star/awt/XControlModel.hpp>
/** === end UNO includes === **/
#include <rtl/ref.hxx>

//........................................................................
namespace frm
{
//........................................................................

	//====================================================================
	//= WindowStateGuard
	//====================================================================
    class WindowStateGuard_Impl;

    /** a helper class which monitors certain states of an XWindow2, and ensures
        that they're consistent with respective properties at an XModel.

        For form controls, window states - such as "Enabled" - can be set by various
        means. You can set the respective control model property, you can directly manipulate
        the XWindow2, or the state can change implicitly due to VCL actions. In any case,
        we need to ensure that the state does not contradict the model property "too much".

        As an example, consider a form control which, according to its model's property, is disabled.
        Now when the parent VCL window of the control's VCL window is enabled, then the control's
        window is enabled, too - which contradicts the model property.

        A WindowStateGuard helps you preventing such inconsistent states.

        The class is not threadsafe.
    */
	class WindowStateGuard
	{
    private:
        ::rtl::Reference< WindowStateGuard_Impl >   m_pImpl;

    public:
        WindowStateGuard();
        ~WindowStateGuard();

        void    attach(
            const ::com::sun::star::uno::Reference< ::com::sun::star::awt::XWindow2 >& _rxWindow,
            const ::com::sun::star::uno::Reference< ::com::sun::star::awt::XControlModel >& _rxModel
        );
	};

//........................................................................
} // namespace frm
//........................................................................

#endif // FORMS_WINDOWSTATEGUARD_HXX