include/comphelper/SelectionMultiplex.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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   9  * This file incorporates work covered by the following license notice:
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  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_COMPHELPER_SELECTIONMULTIPLEX_HXX
  21 #define INCLUDED_COMPHELPER_SELECTIONMULTIPLEX_HXX
  22
  23 #include <com/sun/star/view/XSelectionChangeListener.hpp>
  24 #include <com/sun/star/lang/EventObject.hpp>
  25 #include <cppuhelper/implbase.hxx>
  26 #include <comphelper/comphelperdllapi.h>
  27
  28 namespace com::sun::star::view { class XSelectionSupplier; }
  29
  30 //= selection helper classes
  31
  32
  33 namespace comphelper
  34 {
  35
  36
  37     //= OSelectionChangeListener
  38
  39     /// simple listener adapter for selections
  40     class COMPHELPER_DLLPUBLIC OSelectionChangeListener
  41     {
  42         friend class OSelectionChangeMultiplexer;
  43
  44     public:
  45         OSelectionChangeListener() {}
  46         virtual ~OSelectionChangeListener();
  47
  48         /// @throws css::uno::RuntimeException
  49         virtual void _selectionChanged( const css::lang::EventObject& aEvent ) = 0;
  50         /// @throws css::uno::RuntimeException
  51         virtual void _disposing(const css::lang::EventObject& _rSource);
  52     };
  53
  54
  55     //= OSelectionChangeMultiplexer
  56
  57     /// multiplexer for selection changes
  58     class COMPHELPER_DLLPUBLIC OSelectionChangeMultiplexer  :public cppu::WeakImplHelper< css::view::XSelectionChangeListener>
  59     {
  60         friend class OSelectionChangeListener;
  61         css::uno::Reference< css::view::XSelectionSupplier>  m_xSet;
  62         OSelectionChangeListener*                            m_pListener;
  63         sal_Int32                                            m_nLockCount;
  64
  65         OSelectionChangeMultiplexer(const OSelectionChangeMultiplexer&) = delete;
  66         OSelectionChangeMultiplexer& operator=(const OSelectionChangeMultiplexer&) = delete;
  67     protected:
  68         virtual ~OSelectionChangeMultiplexer() override;
  69     public:
  70         OSelectionChangeMultiplexer(OSelectionChangeListener* _pListener, const  css::uno::Reference< css::view::XSelectionSupplier>& _rxSet);
  71
  72     // XEventListener
  73         virtual void SAL_CALL disposing( const  css::lang::EventObject& Source ) override;
  74
  75     // XSelectionChangeListener
  76         virtual void SAL_CALL selectionChanged( const css::lang::EventObject& aEvent ) override;
  77
  78         /// incremental lock
  79         void        lock();
  80         /// incremental unlock
  81         void        unlock();
  82         /// get the lock count
  83         sal_Int32   locked() const { return m_nLockCount; }
  84     };
  85
  86
  87 }   // namespace comphelper
  88
  89
  90 #endif // INCLUDED_COMPHELPER_SELECTIONMULTIPLEX_HXX
  91
  92 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */