chart2/source/inc/EventListenerHelper.hxx

   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 #pragma once
  20
  21 #include <com/sun/star/lang/XComponent.hpp>
  22
  23 #include <utility>
  24
  25 namespace com::sun::star::lang { class XEventListener; }
  26
  27 namespace chart
  28 {
  29 namespace EventListenerHelper
  30 {
  31
  32 namespace impl
  33 {
  34
  35 template< class InterfaceRef >
  36 struct addListenerFunctor
  37 {
  38     explicit addListenerFunctor( css::uno::Reference< css::lang::XEventListener > xListener ) :
  39             m_xListener(std::move( xListener ))
  40     {}
  41
  42     void operator() ( const InterfaceRef & xObject )
  43     {
  44         css::uno::Reference< css::lang::XComponent >
  45               xBroadcaster( xObject, css::uno::UNO_QUERY );
  46         if( xBroadcaster.is() && m_xListener.is())
  47             xBroadcaster->addEventListener( m_xListener );
  48     }
  49 private:
  50     css::uno::Reference< css::lang::XEventListener > m_xListener;
  51 };
  52
  53 template< class InterfaceRef >
  54 struct removeListenerFunctor
  55 {
  56     explicit removeListenerFunctor( css::uno::Reference<  css::lang::XEventListener > xListener ) :
  57             m_xListener(std::move( xListener ))
  58     {}
  59
  60     void operator() ( const InterfaceRef & xObject )
  61     {
  62         css::uno::Reference< css::lang::XComponent >
  63               xBroadcaster( xObject, css::uno::UNO_QUERY );
  64         if( xBroadcaster.is() && m_xListener.is())
  65             xBroadcaster->removeEventListener( m_xListener );
  66     }
  67 private:
  68     css::uno::Reference< css::lang::XEventListener > m_xListener;
  69 };
  70
  71 } //  namespace impl
  72
  73 template< class InterfaceRef >
  74 void addListener(
  75     const InterfaceRef & xObject,
  76     const css::uno::Reference< css::lang::XEventListener > & xListener )
  77 {
  78     if( xListener.is())
  79     {
  80         impl::addListenerFunctor< InterfaceRef > aFunctor( xListener );
  81         aFunctor( xObject );
  82     }
  83 }
  84
  85 template< class Container >
  86 void addListenerToAllElements(
  87     const Container & rContainer,
  88     const css::uno::Reference< css::lang::XEventListener > & xListener )
  89 {
  90     if( xListener.is())
  91         std::for_each( rContainer.begin(), rContainer.end(),
  92                          impl::addListenerFunctor< typename Container::value_type >( xListener ));
  93 }
  94
  95 template< class InterfaceRef >
  96 void removeListener(
  97     const InterfaceRef & xObject,
  98     const css::uno::Reference< css::lang::XEventListener > & xListener )
  99 {
 100     if( xListener.is())
 101     {
 102         impl::removeListenerFunctor< InterfaceRef > aFunctor( xListener );
 103         aFunctor( xObject );
 104     }
 105 }
 106
 107 template< class Container >
 108 void removeListenerFromAllElements(
 109     const Container & rContainer,
 110     const css::uno::Reference< css::lang::XEventListener > & xListener )
 111 {
 112     if( xListener.is())
 113         std::for_each( rContainer.begin(), rContainer.end(),
 114                          impl::removeListenerFunctor< typename Container::value_type >( xListener ));
 115 }
 116
 117 } //  namespace EventListenerHelper
 118 } //  namespace chart
 119
 120 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */