xref: /aoo42x/main/comphelper/inc/comphelper/SelectionMultiplex.hxx (revision 9877b273)

/**************************************************************
 *
 * 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.
 *
 *************************************************************/



#ifndef INCLUDED_COMPHELPER_SELECTION_MULTIPLEX_HXX
#define INCLUDED_COMPHELPER_SELECTION_MULTIPLEX_HXX

#include <com/sun/star/view/XSelectionChangeListener.hpp>
#include <com/sun/star/view/XSelectionSupplier.hpp>
#include <cppuhelper/implbase1.hxx>
#include "comphelper/comphelperdllapi.h"

//=========================================================================
//= selection helper classes
//=========================================================================

//.........................................................................
namespace comphelper
{
//.........................................................................

	class OSelectionChangeMultiplexer;

	//==================================================================
	//= OSelectionChangeListener
	//==================================================================
	/// simple listener adapter for selections
	class COMPHELPER_DLLPUBLIC OSelectionChangeListener
	{
		friend class OSelectionChangeMultiplexer;

		OSelectionChangeMultiplexer*    m_pAdapter;
		::osl::Mutex&				    m_rMutex;

	public:
		OSelectionChangeListener(::osl::Mutex& _rMutex)
			: m_pAdapter(NULL), m_rMutex(_rMutex) { }
		virtual ~OSelectionChangeListener();

        virtual void _selectionChanged( const ::com::sun::star::lang::EventObject& aEvent ) throw (::com::sun::star::uno::RuntimeException) = 0;
		virtual void _disposing(const ::com::sun::star::lang::EventObject& _rSource) throw( ::com::sun::star::uno::RuntimeException);

	protected:
        /** If the derivee also owns the mutex which we know as reference, then call this within your
            derivee's dtor.
        */
        void    disposeAdapter();

        // pseudo-private. Making it private now could break compatibility
		void    setAdapter( OSelectionChangeMultiplexer* _pAdapter );
	};

	//==================================================================
	//= OSelectionChangeMultiplexer
	//==================================================================
	/// multiplexer for selection changes
	class COMPHELPER_DLLPUBLIC OSelectionChangeMultiplexer	:public cppu::WeakImplHelper1< ::com::sun::star::view::XSelectionChangeListener>
	{
		friend class OSelectionChangeListener;
		 ::com::sun::star::uno::Reference< ::com::sun::star::view::XSelectionSupplier>	m_xSet;
		OSelectionChangeListener*					m_pListener;
		sal_Int32									m_nLockCount;
		sal_Bool									m_bListening		: 1;
		sal_Bool									m_bAutoSetRelease	: 1;

        OSelectionChangeMultiplexer(const OSelectionChangeMultiplexer&);
		OSelectionChangeMultiplexer& operator=(const OSelectionChangeMultiplexer&);
    protected:
		virtual ~OSelectionChangeMultiplexer();
	public:
		OSelectionChangeMultiplexer(OSelectionChangeListener* _pListener, const  ::com::sun::star::uno::Reference< ::com::sun::star::view::XSelectionSupplier>& _rxSet, sal_Bool _bAutoReleaseSet = sal_True);

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

	// XSelectionChangeListener
        virtual void SAL_CALL selectionChanged( const ::com::sun::star::lang::EventObject& aEvent ) throw (::com::sun::star::uno::RuntimeException);

		/// incremental lock
		void		lock();
		/// incremental unlock
		void		unlock();
		/// get the lock count
		sal_Int32	locked() const { return m_nLockCount; }

		void dispose();
	};

//.........................................................................
}	// namespace comphelper
//.........................................................................

#endif // INCLUDED_COMPHELPER_SELECTION_MULTIPLEX_HXX