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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
#ifndef INCLUDED_CHART2_SOURCE_INC_WEAKLISTENERADAPTER_HXX
#define INCLUDED_CHART2_SOURCE_INC_WEAKLISTENERADAPTER_HXX
#include <com/sun/star/lang/XEventListener.hpp>
#include <com/sun/star/util/XModifyListener.hpp>
#include <com/sun/star/view/XSelectionChangeListener.hpp>
#include <cppuhelper/weakref.hxx>
#include <cppuhelper/implbase.hxx>
namespace chart
{
/** Adapter that enables adding listeners as weak UNO references. Thus, adding
an object as listener to a broadcaster does not increase its reference
count.
<p>The helper class, of course, is held as hard reference at the
broadcaster, but this should never be a problem as the adapter's life time
depends on no other object.</p>
<p>Note that in order to remove an object as listener, you have to remove
the same wrapper that you added, i.e., you should store the adapter as a
member in the adapted class for later use.</p>
*/
template< class Listener >
class WeakListenerAdapter : public
::cppu::WeakImplHelper< Listener >
{
public:
explicit WeakListenerAdapter( const css::uno::Reference< Listener > & xListener ) :
m_xListener( xListener )
{}
explicit WeakListenerAdapter( const css::uno::WeakReference< Listener > & xListener ) :
m_xListener( xListener )
{}
protected:
// ____ XEventListener (base of all listeners) ____
virtual void SAL_CALL disposing(
const css::lang::EventObject& Source ) override
{
css::uno::Reference< css::lang::XEventListener > xEventListener(
css::uno::Reference< Listener >( m_xListener), css::uno::UNO_QUERY );
if( xEventListener.is())
xEventListener->disposing( Source );
}
css::uno::Reference< Listener > getListener() const
{
return m_xListener;
}
private:
css::uno::WeakReference< Listener > m_xListener;
};
class WeakModifyListenerAdapter :
public WeakListenerAdapter< css::util::XModifyListener >
{
public:
explicit WeakModifyListenerAdapter(
const css::uno::WeakReference< css::util::XModifyListener > & xListener );
virtual ~WeakModifyListenerAdapter() override;
protected:
// ____ XModifyListener ____
virtual void SAL_CALL modified( const css::lang::EventObject& aEvent ) override;
};
class WeakSelectionChangeListenerAdapter :
public WeakListenerAdapter< css::view::XSelectionChangeListener >
{
public:
explicit WeakSelectionChangeListenerAdapter(
const css::uno::Reference< css::view::XSelectionChangeListener > & xListener );
virtual ~WeakSelectionChangeListenerAdapter() override;
protected:
// ____ XSelectionChangeListener ____
virtual void SAL_CALL selectionChanged(
const css::lang::EventObject& aEvent ) override;
};
} // namespace chart
// INCLUDED_CHART2_SOURCE_INC_WEAKLISTENERADAPTER_HXX
#endif
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