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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
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 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_chart2.hxx"

#include "ModifyListenerCallBack.hxx"
#include "MutexContainer.hxx"
#include <cppuhelper/compbase1.hxx>

using namespace ::com::sun::star;
using ::com::sun::star::uno::Reference;

namespace chart {

typedef ::cppu::WeakComponentImplHelper1<
        ::com::sun::star::util::XModifyListener >
    ModifyListenerCallBack_Base;

class ModifyListenerCallBack_impl
    : public ::chart::MutexContainer
    , public ModifyListenerCallBack_Base
{
public:
    explicit ModifyListenerCallBack_impl( const Link& rCallBack );
    virtual ~ModifyListenerCallBack_impl();

    void startListening( const Reference< util::XModifyBroadcaster >& xBroadcaster );
    void stopListening();

    //XModifyListener
    virtual void SAL_CALL modified( const lang::EventObject& aEvent ) throw (uno::RuntimeException);

    //XEventListener
    virtual void SAL_CALL disposing( const lang::EventObject& Source ) throw (uno::RuntimeException);

    using ::cppu::WeakComponentImplHelperBase::disposing;

private:
    Link m_aLink;//will be callef on modify
    Reference< util::XModifyBroadcaster > m_xBroadcaster;//broadcaster to listen at
};


ModifyListenerCallBack_impl::ModifyListenerCallBack_impl( const Link& rCallBack )
                        : ModifyListenerCallBack_Base( m_aMutex )
                        , m_aLink( rCallBack )
                        , m_xBroadcaster(0)
{
}

ModifyListenerCallBack_impl::~ModifyListenerCallBack_impl()
{
}

//XModifyListener
void SAL_CALL ModifyListenerCallBack_impl::modified( const lang::EventObject& /*aEvent*/ ) throw (uno::RuntimeException)
{
    m_aLink.Call(0);
}

//XEventListener
void SAL_CALL ModifyListenerCallBack_impl::disposing( const lang::EventObject& /*Source*/ ) throw (uno::RuntimeException)
{
    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& 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