include/comphelper/accimplaccess.hxx

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  19
  20 #ifndef INCLUDED_COMPHELPER_ACCIMPLACCESS_HXX
  21 #define INCLUDED_COMPHELPER_ACCIMPLACCESS_HXX
  22
  23 #include <cppuhelper/implbase1.hxx>
  24 #include <com/sun/star/lang/XUnoTunnel.hpp>
  25 #include <comphelper/comphelperdllapi.h>
  26
  27 namespace comphelper
  28 {
  29     //= OAccessibleImplementationAccess
  30
  31     typedef ::cppu::ImplHelper1 <   css::lang::XUnoTunnel
  32                                 >   OAccImpl_Base;
  33
  34     /** This is a helper class which allows accessing several aspects of the implementation
  35         of an AccessibleContext.
  36
  37         <p>For instance, when you want to implement a context which can be re-parented, you:
  38             <ul><li>derive your class from OAccessibleImplementationAccess</li>
  39                 <li>use <code>setAccessibleParent( <em>component</em>, <em>new_parent</em> )</code>
  40             </ul>
  41         </p>
  42
  43         <p>Another aspect which can be controlled from the outside are states. If you have a class which
  44         has only partial control over it's states, you may consider deriving from OAccessibleImplementationAccess.<br/>
  45         For instance, say you have an implementation (say component A) which is <em>unable</em> to know or to
  46         determine if the represented object is selected, but another component (say B) which uses A (and integrates
  47         it into a tree of accessibility components) is.<br/>
  48         In this case, if A is derived from OAccessibleImplementationAccess, B can manipulate this
  49         foreign-controlled state flag "SELECTED" by using the static helper methods on this class.</p>
  50
  51         <p>Please note that the support for foreign controlled states is rather restrictive: You can't have states
  52         which <em>may be</em> controlled by a foreign instances. This is implied by the fact that a derived
  53         class can ask for states which are <em>set</em> only, not for the ones which are <em>reset</em> currently.
  54         </p>
  55     */
  56     class COMPHELPER_DLLPUBLIC OAccessibleImplementationAccess : public OAccImpl_Base
  57     {
  58     protected:
  59         OAccessibleImplementationAccess( );
  60         virtual ~OAccessibleImplementationAccess( );
  61
  62         // XUnoTunnel
  63         virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& _rIdentifier ) override;
  64
  65     public:
  66
  67     private:
  68         COMPHELPER_DLLPRIVATE static css::uno::Sequence< sal_Int8 > getUnoTunnelImplementationId();
  69     };
  70
  71 } // namespace comphelper
  72
  73 #endif // INCLUDED_COMPHELPER_ACCIMPLACCESS_HXX
  74
  75 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */