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       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      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             : #ifndef INCLUDED_CHART2_SOURCE_INC_WEAKLISTENERADAPTER_HXX
      20             : #define INCLUDED_CHART2_SOURCE_INC_WEAKLISTENERADAPTER_HXX
      21             : 
      22             : #include <com/sun/star/uno/XWeak.hpp>
      23             : #include <com/sun/star/lang/XEventListener.hpp>
      24             : #include <com/sun/star/util/XModifyListener.hpp>
      25             : #include <com/sun/star/view/XSelectionChangeListener.hpp>
      26             : #include <cppuhelper/weakref.hxx>
      27             : #include <cppuhelper/implbase1.hxx>
      28             : 
      29             : namespace chart
      30             : {
      31             : 
      32             : /** Adapter that enables adding listeners as weak UNO references.  Thus, adding
      33             :     an object as listener to a broadcaster does not increase its reference
      34             :     count.
      35             : 
      36             :     <p>The helper class, of course, is held as hard reference at the
      37             :     broadcaster, but this should never be a problem as the adapter's life time
      38             :     depends on no other object.</p>
      39             : 
      40             :     <p>Note that in order to remove an object as listener, you have to remove
      41             :     the same wrapper that you added, i.e., you should store the adapter as a
      42             :     member in the adaptee class for later use.</p>
      43             :  */
      44             : template< class Listener >
      45             :     class WeakListenerAdapter : public
      46             :     ::cppu::WeakImplHelper1< Listener >
      47             : {
      48             : public:
      49           0 :     explicit WeakListenerAdapter( const ::com::sun::star::uno::Reference< Listener > & xListener ) :
      50           0 :             m_xListener( xListener )
      51           0 :     {}
      52       25259 :     explicit WeakListenerAdapter( const ::com::sun::star::uno::WeakReference< Listener > & xListener ) :
      53       25259 :             m_xListener( xListener )
      54       25259 :     {}
      55       24714 :     virtual ~WeakListenerAdapter()
      56       24714 :     {}
      57             : 
      58             : protected:
      59             :     // ____ XEventListener (base of all listeners) ____
      60         932 :     virtual void SAL_CALL disposing(
      61             :         const ::com::sun::star::lang::EventObject& Source )
      62             :         throw (::com::sun::star::uno::RuntimeException)
      63             :     {
      64             :         ::com::sun::star::uno::Reference<
      65             :               ::com::sun::star::lang::XEventListener > xEventListener =
      66             :           ::com::sun::star::uno::Reference<
      67             :               ::com::sun::star::lang::XEventListener >(
      68         932 :                   ::com::sun::star::uno::Reference< Listener >( m_xListener), ::com::sun::star::uno::UNO_QUERY );
      69         932 :         if( xEventListener.is())
      70         810 :             xEventListener->disposing( Source );
      71         932 :     }
      72             : 
      73      128273 :     ::com::sun::star::uno::Reference< Listener > getListener() const
      74             :     {
      75      128273 :         return m_xListener;
      76             :     }
      77             : 
      78             : private:
      79             :     ::com::sun::star::uno::WeakReference< Listener > m_xListener;
      80             : };
      81             : 
      82             : class WeakModifyListenerAdapter :
      83             :         public WeakListenerAdapter< ::com::sun::star::util::XModifyListener >
      84             : {
      85             : public:
      86             :     explicit WeakModifyListenerAdapter(
      87             :         const ::com::sun::star::uno::WeakReference< ::com::sun::star::util::XModifyListener > & xListener );
      88             :     virtual ~WeakModifyListenerAdapter();
      89             : 
      90             : protected:
      91             :     // ____ XModifyListener ____
      92             :     virtual void SAL_CALL modified( const ::com::sun::star::lang::EventObject& aEvent )
      93             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
      94             : };
      95             : 
      96             : class WeakSelectionChangeListenerAdapter :
      97             :         public WeakListenerAdapter< ::com::sun::star::view::XSelectionChangeListener >
      98             : {
      99             : public:
     100             :     explicit WeakSelectionChangeListenerAdapter(
     101             :         const ::com::sun::star::uno::Reference< ::com::sun::star::view::XSelectionChangeListener > & xListener );
     102             :     virtual ~WeakSelectionChangeListenerAdapter();
     103             : 
     104             : protected:
     105             :     // ____ XSelectionChangeListener ____
     106             :     virtual void SAL_CALL selectionChanged(
     107             :         const ::com::sun::star::lang::EventObject& aEvent )
     108             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     109             : };
     110             : 
     111             : } //  namespace chart
     112             : 
     113             : // INCLUDED_CHART2_SOURCE_INC_WEAKLISTENERADAPTER_HXX
     114             : #endif
     115             : 
     116             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */