chart2/source/tools/ModifyListenerCallBack.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   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
  20 #include <ModifyListenerCallBack.hxx>
  21 #include <comphelper/compbase.hxx>
  22
  23 using namespace ::com::sun::star;
  24 using ::com::sun::star::uno::Reference;
  25
  26 namespace chart {
  27
  28 typedef comphelper::WeakComponentImplHelper< css::util::XModifyListener >
  29     ModifyListenerCallBack_Base;
  30
  31 class ModifyListenerCallBack_impl
  32     : public ModifyListenerCallBack_Base
  33 {
  34 public:
  35     explicit ModifyListenerCallBack_impl( const Link<void*,void>& rCallBack );
  36
  37     void startListening( const Reference< util::XModifyBroadcaster >& xBroadcaster );
  38     void stopListening();
  39
  40     //XModifyListener
  41     virtual void SAL_CALL modified( const lang::EventObject& aEvent ) override;
  42
  43     //XEventListener
  44     virtual void SAL_CALL disposing( const lang::EventObject& Source ) override;
  45
  46     using ::comphelper::WeakComponentImplHelperBase::disposing;
  47
  48 private:
  49     Link<void*,void> m_aLink;//will be called on modify
  50     Reference< util::XModifyBroadcaster > m_xBroadcaster;//broadcaster to listen at
  51 };
  52
  53 ModifyListenerCallBack_impl::ModifyListenerCallBack_impl( const Link<void*,void>& rCallBack )
  54                         : m_aLink( rCallBack )
  55 {
  56 }
  57
  58 //XModifyListener
  59 void SAL_CALL ModifyListenerCallBack_impl::modified( const lang::EventObject& /*aEvent*/ )
  60 {
  61     m_aLink.Call(nullptr);
  62 }
  63
  64 //XEventListener
  65 void SAL_CALL ModifyListenerCallBack_impl::disposing( const lang::EventObject& /*Source*/ )
  66 {
  67     m_xBroadcaster.clear();
  68 }
  69
  70 void ModifyListenerCallBack_impl::startListening( const css::uno::Reference< css::util::XModifyBroadcaster >& xBroadcaster )
  71 {
  72     if( m_xBroadcaster == xBroadcaster )
  73         return;
  74
  75     stopListening();
  76     m_xBroadcaster = xBroadcaster;
  77     if( m_xBroadcaster.is() )
  78         m_xBroadcaster->addModifyListener( this );
  79 }
  80 void ModifyListenerCallBack_impl::stopListening()
  81 {
  82     if( m_xBroadcaster.is() )
  83     {
  84         m_xBroadcaster->removeModifyListener( this );
  85         m_xBroadcaster.clear();
  86     }
  87 }
  88
  89 ModifyListenerCallBack::ModifyListenerCallBack( const Link<void*,void>& rCallBack )
  90                         : pModifyListener_impl( new ModifyListenerCallBack_impl(rCallBack) )
  91                         , m_xModifyListener( pModifyListener_impl )
  92 {
  93 }
  94
  95 ModifyListenerCallBack::~ModifyListenerCallBack()
  96 {
  97     stopListening();
  98 }
  99
 100 void ModifyListenerCallBack::startListening( const css::uno::Reference< css::util::XModifyBroadcaster >& xBroadcaster )
 101 {
 102     pModifyListener_impl->startListening( xBroadcaster );
 103 }
 104 void ModifyListenerCallBack::stopListening()
 105 {
 106     pModifyListener_impl->stopListening();
 107 }
 108
 109 } // namespace chart
 110
 111 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */