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