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/***************************************************************************
wvumeter.h - description
-------------------
begin : Fri Jul 22 2003
copyright : (C) 2003 by Tue & Ken Haste Andersen
email : haste@diku.dk
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef WVUMETER_H
#define WVUMETER_H
#include <QPixmap>
#include <QString>
#include <QPaintEvent>
#include <QWidget>
#include <QDomNode>
#include "widget/wwidget.h"
#include "widget/wpixmapstore.h"
#include "skin/skincontext.h"
#include "util/performancetimer.h"
class WVuMeter : public WWidget {
Q_OBJECT
public:
WVuMeter(QWidget *parent=0);
virtual ~WVuMeter();
void setup(QDomNode node, const SkinContext& context);
void setPixmapBackground(PixmapSource source, Paintable::DrawMode mode);
void setPixmaps(PixmapSource source,
bool bHorizontal,
Paintable::DrawMode mode);
void onConnectedControlChanged(double dParameter, double dValue);
protected slots:
void updateState(double msecsElapsed);
void maybeUpdate();
private:
void paintEvent(QPaintEvent *);
void setPeak(double parameter);
// Current parameter and peak parameter.
double m_dParameter;
double m_dPeakParameter;
// The last parameter and peak parameter values at the time of
// rendering. Used to check whether the widget state has changed since the
// last render in maybeUpdate.
double m_dLastParameter;
double m_dLastPeakParameter;
// Length of the VU-meter pixmap along the relevant axis.
int m_iPixmapLength;
// Associated pixmaps
PaintablePointer m_pPixmapBack;
PaintablePointer m_pPixmapVu;
// True if it's a horizontal vu meter
bool m_bHorizontal;
int m_iPeakHoldSize;
int m_iPeakFallStep;
int m_iPeakHoldTime;
int m_iPeakFallTime;
// The peak hold time remaining in milliseconds.
double m_dPeakHoldCountdownMs;
PerformanceTimer m_timer;
};
#endif
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