ModifyListenerCallBack.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
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 *   License, Version 2.0 (the "License"); you may not use this file
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#include <ModifyListenerCallBack.hxx>
#include <comphelper/compbase.hxx>
 
using namespace ::com::sun::star;
using ::com::sun::star::uno::Reference;
 
namespace chart {
 
typedef comphelper::WeakComponentImplHelper< css::util::XModifyListener >
    ModifyListenerCallBack_Base;
 
class ModifyListenerCallBack_impl
    : public ModifyListenerCallBack_Base
{
public:
    explicit ModifyListenerCallBack_impl( const Link<void*,void>& rCallBack );
 
    void startListening( const Reference< util::XModifyBroadcaster >& xBroadcaster );
    void stopListening();
 
    //XModifyListener
    virtual void SAL_CALL modified( const lang::EventObject& aEvent ) override;
 
    //XEventListener
    virtual void SAL_CALL disposing( const lang::EventObject& Source ) override;
 
    using ::comphelper::WeakComponentImplHelperBase::disposing;
 
private:
    Link<void*,void> m_aLink;//will be called on modify
    Reference< util::XModifyBroadcaster > m_xBroadcaster;//broadcaster to listen at
};
 
ModifyListenerCallBack_impl::ModifyListenerCallBack_impl( const Link<void*,void>& rCallBack )
                        : m_aLink( rCallBack )
{
}
 
//XModifyListener
void SAL_CALL ModifyListenerCallBack_impl::modified( const lang::EventObject& /*aEvent*/ )
{
    m_aLink.Call(nullptr);
}
 
//XEventListener
void SAL_CALL ModifyListenerCallBack_impl::disposing( const lang::EventObject& /*Source*/ )
{
    m_xBroadcaster.clear();
}
 
void ModifyListenerCallBack_impl::startListening( const ::com::sun::star::uno::Reference< ::com::sun::star::util::XModifyBroadcaster >& xBroadcaster )
{
    if( m_xBroadcaster == xBroadcaster )
        return;
 
    stopListening();
    m_xBroadcaster = xBroadcaster;
    if( m_xBroadcaster.is() )
        m_xBroadcaster->addModifyListener( this );
}
void ModifyListenerCallBack_impl::stopListening()
{
    if( m_xBroadcaster.is() )
    {
        m_xBroadcaster->removeModifyListener( this );
        m_xBroadcaster.clear();
    }
}
 
ModifyListenerCallBack::ModifyListenerCallBack( const Link<void*,void>& rCallBack )
                        : pModifyListener_impl( new ModifyListenerCallBack_impl(rCallBack) )
                        , m_xModifyListener( pModifyListener_impl )
{
}
 
ModifyListenerCallBack::~ModifyListenerCallBack()
{
    stopListening();
}
 
void ModifyListenerCallBack::startListening( const ::com::sun::star::uno::Reference< ::com::sun::star::util::XModifyBroadcaster >& xBroadcaster )
{
    pModifyListener_impl->startListening( xBroadcaster );
}
void ModifyListenerCallBack::stopListening()
{
    pModifyListener_impl->stopListening();
}
 
} // namespace chart
 
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