AOO410/main/svx/inc/svx/shapepropertynotifier.hxx

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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
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 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * "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
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 *************************************************************/



#ifndef SVX_PROPERTYCHANGENOTIFIER_HXX
#define SVX_PROPERTYCHANGENOTIFIER_HXX

#include "svx/svxdllapi.h"
#include "svx/shapeproperty.hxx"

/** === begin UNO includes === **/
#include <com/sun/star/beans/PropertyChangeEvent.hpp>
#include <com/sun/star/beans/XPropertyChangeListener.hpp>
/** === end UNO includes === **/

#include <boost/noncopyable.hpp>
#include <boost/shared_ptr.hpp>
#include <memory>

namespace cppu
{
    class OWeakObject;
}

//........................................................................
namespace svx
{
//........................................................................

	//====================================================================
	//= IPropertyValueProvider
	//====================================================================
    /** a provider for a property value
    */
    class SVX_DLLPUBLIC IPropertyValueProvider
    {
    public:
        /** returns the name of the property which this provider is responsible for
        */
        virtual ::rtl::OUString getPropertyName() const = 0;

        /** returns the current value of the property which the provider is responsible for
        */
        virtual void getCurrentValue( ::com::sun::star::uno::Any& _out_rValue ) const = 0;

        virtual ~IPropertyValueProvider();
    };
    typedef ::boost::shared_ptr< IPropertyValueProvider >  PPropertyValueProvider;

	//====================================================================
	//= PropertyValueProvider
	//====================================================================
    /** default implementation of a IPropertyValueProvider

        This default implementation queries the object which it is constructed with for the XPropertySet interface,
        and calls the getPropertyValue method.
    */
    class SVX_DLLPUBLIC PropertyValueProvider   :public IPropertyValueProvider
                                                ,public ::boost::noncopyable
    {
    public:
        PropertyValueProvider( ::cppu::OWeakObject& _rContext, const sal_Char* _pAsciiPropertyName )
            :m_rContext( _rContext )
            ,m_sPropertyName( ::rtl::OUString::createFromAscii( _pAsciiPropertyName ) )
        {
        }

        virtual ::rtl::OUString getPropertyName() const;
        virtual void getCurrentValue( ::com::sun::star::uno::Any& _out_rValue ) const;

    protected:
        ::cppu::OWeakObject&    getContext() const { return m_rContext; }
    private:
        ::cppu::OWeakObject&    m_rContext;
        const ::rtl::OUString   m_sPropertyName;
    };

	//====================================================================
	//= PropertyChangeNotifier
	//====================================================================
    struct PropertyChangeNotifier_Data;

    /** helper class for notifying XPropertyChangeListeners

        The class is intended to be held as member of the class which does the property change broadcasting.
    */
    class SVX_DLLPUBLIC PropertyChangeNotifier : public ::boost::noncopyable
	{
    public:
        /** constructs a notifier instance

            @param _rOwner
                the owner instance of the notifier. Will be used as css.lang.EventObject.Source when
                notifying events.
        */
        PropertyChangeNotifier( ::cppu::OWeakObject& _rOwner, ::osl::Mutex& _rMutex );
        ~PropertyChangeNotifier();

        // listener maintanance
        void addPropertyChangeListener( const ::rtl::OUString& _rPropertyName, const ::com::sun::star::uno::Reference< ::com::sun::star::beans::XPropertyChangeListener >& _rxListener );
        void removePropertyChangeListener( const ::rtl::OUString& _rPropertyName, const ::com::sun::star::uno::Reference< ::com::sun::star::beans::XPropertyChangeListener >& _rxListener );

        /** registers a IPropertyValueProvider
        */
        void    registerProvider( const ShapeProperty _eProperty, const PPropertyValueProvider _pProvider );

        /** notifies changes in the given property to all registered listeners

            If no property value provider for the given property ID is registered, this is worth an assertion in a
            non-product build, and otherwise ignored.
        */
        void    notifyPropertyChange( const ShapeProperty _eProperty ) const;

        /** is called to dispose the instance
        */
        void    disposing();

    private:
        ::std::auto_ptr< PropertyChangeNotifier_Data >  m_pData;
	};

//........................................................................
} // namespace svx
//........................................................................

#endif // SVX_PROPERTYCHANGENOTIFIER_HXX