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/*
Copyright (C) 2001 Stefan Westerfeld
stefan@space.twc.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "common.h"
#include <qobject.h>
class KArtsFloatWatchPrivate;
namespace Arts { class KFloatWatchProxy_impl; }
/**
* KArtsFloatWatch offers an easy way to watch aRts streams via Qt signals.
* For instance, if you have an object of the following type:
*
* \code
* interface StereoVolumeControl : StereoEffect {
* attribute float scaleFactor;
* readonly attribute float currentVolumeLeft;
* readonly attribute float currentVolumeRight;
* };
* \endcode
*
* and you want to get notified when scaleFactor changes, you could do it
* like this:
*
* \code
* StereoVolumeControl stereoVolumeControl = ...;
* KArtsFloatWatch *w = new KArtsFloatWatch(stereoVolumeControl, "scaleFactor_changed", this);
* connect(w, SIGNAL(valueChanged(float)), this, SLOT(setValue(float)));
* \endcode
*/
class KArtsFloatWatch : public QObject {
Q_OBJECT
private:
KArtsFloatWatchPrivate *d;
friend class Arts::KFloatWatchProxy_impl;
/**
* called by the proxy (internal)
*/
void change(float newValue);
public:
/**
* Constructor.
*
* @param object the aRts object that should be watched
* @param stream the aRts stream that should be watched
* @param parent the parent Qt object
* @param name the Qt object name of this object
*/
KArtsFloatWatch(Arts::Object object, const char *stream, QObject *parent = 0, const char *name = 0);
/**
* Destructor
*/
~KArtsFloatWatch();
signals:
/**
* this signal will be emitted with values of the aRts stream
*/
void valueChanged(float newValue);
};
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