vclstatuslistener.hxx

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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/.
 */
 
#pragma once
 
#include <cppuhelper/implbase.hxx>
#include <comphelper/processfactory.hxx>
#include <vcl/vclptr.hxx>
 
#include <com/sun/star/frame/Desktop.hpp>
#include <com/sun/star/frame/XStatusListener.hpp>
#include <com/sun/star/frame/XDispatch.hpp>
#include <com/sun/star/frame/XDispatchProvider.hpp>
#include <com/sun/star/util/URL.hpp>
#include <com/sun/star/util/URLTransformer.hpp>
 
template <class T> class VclStatusListener final : public cppu::WeakImplHelper < css::frame::XStatusListener>
{
public:
    VclStatusListener(T* widget, const css::uno::Reference<css::frame::XFrame>& rFrame, const OUString& aCommand);
 
private:
    VclPtr<T> mWidget; 
    css::uno::Reference<css::frame::XDispatch> mxDispatch;
    css::util::URL maCommandURL;
    css::uno::Reference<css::frame::XFrame> mxFrame;
 
public:
    void SAL_CALL statusChanged(const css::frame::FeatureStateEvent& rEvent) override;
 
    void SAL_CALL disposing(const css::lang::EventObject& /*Source*/) override;
 
    void startListening();
 
    void dispose();
};
 
template<class T>
VclStatusListener<T>::VclStatusListener(T* widget, const css::uno::Reference<css::frame::XFrame>& rFrame, const OUString& aCommand) :
    mWidget(widget),
    mxFrame(rFrame)
{
    css::uno::Reference<css::uno::XComponentContext> xContext = ::comphelper::getProcessComponentContext();
    maCommandURL.Complete = aCommand;
    css::uno::Reference<css::util::XURLTransformer> xParser = css::util::URLTransformer::create(xContext);
    xParser->parseStrict(maCommandURL);
}
 
template<class T>
void VclStatusListener<T>::startListening()
{
    css::uno::Reference<css::frame::XDispatchProvider> xDispatchProvider(mxFrame, css::uno::UNO_QUERY);
    if (!xDispatchProvider.is())
        return;
 
    mxDispatch = xDispatchProvider->queryDispatch(maCommandURL, "", 0);
    if (mxDispatch.is())
        mxDispatch->addStatusListener(this, maCommandURL);
}
 
template<class T>
void VclStatusListener<T>::statusChanged(const css::frame::FeatureStateEvent& rEvent)
{
    mWidget->statusChanged(rEvent);
}
 
template<class T>
void VclStatusListener<T>::disposing(const css::lang::EventObject& /*Source*/)
{
    mxDispatch.clear();
}
 
template<class T>
void VclStatusListener<T>::dispose()
{
    if (mxDispatch.is()) {
        mxDispatch->removeStatusListener(this, maCommandURL);
        mxDispatch.clear();
    }
    mxFrame.clear();
    mWidget.clear();
}
 
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