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