mirror of
https://github.com/f4exb/sdrangel.git
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355 lines
10 KiB
C++
355 lines
10 KiB
C++
/****************************************************************************
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* Copyright (C) 2016 Edouard Griffiths, F4EXB
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* Modifications made to:
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* - use the widget horizontally
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* - differentiate each area with a different color
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* - allow overload by 25% with indication of 100% threshold and overload
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* - make it generic to fit many cases: VU, signal strength ...
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "gui/levelmeter.h"
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#include <math.h>
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#include <QPainter>
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#include <QTimer>
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#include <QDebug>
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// Constants
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const int RedrawInterval = 100; // ms
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const qreal PeakDecayRate = 0.001;
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const int PeakHoldLevelDuration = 2000; // ms
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LevelMeter::LevelMeter(QWidget *parent)
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: QWidget(parent)
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, m_avgLevel(0.0)
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, m_peakLevel(0.0)
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, m_decayedPeakLevel(0.0)
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, m_peakDecayRate(PeakDecayRate)
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, m_peakHoldLevel(0.0)
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, m_redrawTimer(new QTimer(this))
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, m_avgColor(0xff, 0x8b, 0x00, 128) // color mapper foreground
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, m_decayedPeakColor(0x97, 0x54, 0x00, 128) // color mapper 59%
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, m_peakColor(Qt::red) // just red 100% opaque
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, m_backgroundPixmap(0)
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{
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setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
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setMinimumWidth(30);
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connect(m_redrawTimer, SIGNAL(timeout()), this, SLOT(redrawTimerExpired()));
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m_redrawTimer->start(RedrawInterval);
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}
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LevelMeter::~LevelMeter()
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{
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if (m_backgroundPixmap) {
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delete m_backgroundPixmap;
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}
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}
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void LevelMeter::reset()
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{
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m_avgLevel = 0.0;
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m_peakLevel = 0.0;
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update();
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}
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void LevelMeter::levelChanged(qreal avgLevel, qreal peakLevel, int numSamples)
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{
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// Smooth the RMS signal
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const qreal smooth = pow(qreal(0.9), static_cast<qreal>(numSamples) / 256); // TODO: remove this magic number
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m_avgLevel = (m_avgLevel * smooth) + (avgLevel * (1.0 - smooth));
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if (peakLevel > m_decayedPeakLevel) {
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m_peakLevel = peakLevel;
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m_decayedPeakLevel = peakLevel;
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m_peakLevelChanged.start();
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}
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if (peakLevel > m_peakHoldLevel) {
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m_peakHoldLevel = peakLevel;
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m_peakHoldLevelChanged.start();
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}
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update();
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}
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void LevelMeter::redrawTimerExpired()
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{
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// Decay the peak signal
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const int elapsedMs = m_peakLevelChanged.elapsed();
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const qreal decayAmount = m_peakDecayRate * elapsedMs;
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if (decayAmount < m_peakLevel)
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m_decayedPeakLevel = m_peakLevel - decayAmount;
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else
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m_decayedPeakLevel = 0.0;
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// Check whether to clear the peak hold level
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if (m_peakHoldLevelChanged.elapsed() > PeakHoldLevelDuration)
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m_peakHoldLevel = 0.0;
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update();
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}
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void LevelMeter::paintEvent(QPaintEvent *event)
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{
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Q_UNUSED(event)
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QPainter painter(this);
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render(&painter);
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}
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void LevelMeter::resizeEvent(QResizeEvent * event)
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{
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Q_UNUSED(event)
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resized();
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}
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// ====================================================================
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LevelMeterVU::LevelMeterVU(QWidget *parent) :
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LevelMeter(parent)
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{
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m_scaleEngine.setFont(font());
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m_scaleEngine.setOrientation(Qt::Horizontal);
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m_scaleEngine.setRange(Unit::Percent, 0, 100);
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resized();
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}
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LevelMeterVU::~LevelMeterVU()
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{
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}
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void LevelMeterVU::resized()
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{
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if (m_backgroundPixmap)
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{
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delete m_backgroundPixmap;
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}
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m_backgroundPixmap = new QPixmap(rect().width(), rect().height());
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m_backgroundPixmap->fill(QColor(42, 42, 42, 255));
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QPainter painter(m_backgroundPixmap);
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QRect barTop = m_backgroundPixmap->rect();
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barTop.setBottom(0.5 * rect().height() - 2);
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barTop.setTop(2);
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barTop.setLeft(0.75* rect().width());
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painter.fillRect(barTop, Qt::red);
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QRect bar = m_backgroundPixmap->rect();
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// 100% full height white line
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painter.setPen(Qt::white);
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// painter.drawLine(0.75*bar.width(), 0, 0.75*bar.width(), bar.height());
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m_scaleEngine.setSize(0.75*bar.width());
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const ScaleEngine::TickList& scaleTickList = m_scaleEngine.getTickList();
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for (int i = 0; i < scaleTickList.count(); i++)
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{
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// qDebug() << "LevelMeterVU::resized: tick #" << i
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// << " major: " << scaleTickList[i].major
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// << " pos: " << scaleTickList[i].pos
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// << " text: " << scaleTickList[i].text
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// << " textPos: " << scaleTickList[i].textPos
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// << " textSize: " << scaleTickList[i].textSize;
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const ScaleEngine::Tick tick = scaleTickList[i];
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if(tick.major)
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{
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if ((tick.textSize > 0) && (tick.textPos > 0))
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{
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painter.drawText(QPointF(tick.textPos - (tick.textSize/2) - 2, bar.height()/2), tick.text);
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}
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painter.drawLine(tick.pos, 0, scaleTickList[i].pos, bar.height());
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}
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else
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{
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painter.drawLine(tick.pos, bar.height()/4, scaleTickList[i].pos, bar.height()/2);
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}
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}
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}
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void LevelMeterVU::render(QPainter *painter)
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{
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painter->drawPixmap(rect(), *m_backgroundPixmap);
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QRect bar = rect();
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// Bottom moving gauge
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bar.setTop(0.5 * rect().height() + 2);
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bar.setBottom(rect().height() - 1);
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bar.setRight(rect().right() - (1.0 - 0.75*m_peakHoldLevel) * rect().width());
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bar.setLeft(bar.right() - 2);
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painter->fillRect(bar, m_peakColor);
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bar.setBottom(0.75*rect().height());
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bar.setRight(rect().right() - (1.0 - 0.75*m_avgLevel) * rect().width());
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bar.setLeft(1);
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painter->fillRect(bar, m_avgColor);
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bar.setTop(0.75 * rect().height() + 1);
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bar.setBottom(rect().height() - 1);
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bar.setRight(rect().right() - (1.0 - 0.75*m_decayedPeakLevel) * rect().width());
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painter->fillRect(bar, m_decayedPeakColor);
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}
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// ====================================================================
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const QColor LevelMeterSignalDB::m_avgColor[3] = {
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QColor(0xff, 0x8b, 0x00, 128),
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QColor(0x8c, 0xff, 0x00, 128),
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QColor(0x8c, 0xff, 0x00, 128)
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};
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const QColor LevelMeterSignalDB::m_decayedPeakColor[3] = {
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QColor(0x97, 0x54, 0x00, 128),
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QColor(0x53, 0x96, 0x00, 128),
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QColor(0x00, 0x96, 0x53, 128)
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};
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const QColor LevelMeterSignalDB::m_peakColor[3] = {
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Qt::red,
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Qt::green,
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Qt::green
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};
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LevelMeterSignalDB::LevelMeterSignalDB(QWidget *parent) :
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m_colorTheme(ColorGold),
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LevelMeter(parent)
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{
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m_scaleEngine.setFont(font());
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m_scaleEngine.setOrientation(Qt::Horizontal);
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m_scaleEngine.setRange(Unit::Decibel, -100, 0);
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resized();
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}
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LevelMeterSignalDB::~LevelMeterSignalDB()
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{
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}
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void LevelMeterSignalDB::resized()
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{
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if (m_backgroundPixmap)
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{
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delete m_backgroundPixmap;
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}
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m_backgroundPixmap = new QPixmap(rect().width(), rect().height());
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m_backgroundPixmap->fill(QColor(42, 42, 42, 255));
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QPainter painter(m_backgroundPixmap);
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QRect bar = m_backgroundPixmap->rect();
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// 100% full height white line
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painter.setPen(Qt::white);
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painter.setFont(font());
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m_scaleEngine.setSize(bar.width());
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const ScaleEngine::TickList& scaleTickList = m_scaleEngine.getTickList();
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for (int i = 0; i < scaleTickList.count(); i++)
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{
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// qDebug() << "LevelMeterVU::resized: tick #" << i
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// << " major: " << scaleTickList[i].major
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// << " pos: " << scaleTickList[i].pos
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// << " text: " << scaleTickList[i].text
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// << " textPos: " << scaleTickList[i].textPos
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// << " textSize: " << scaleTickList[i].textSize;
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const ScaleEngine::Tick tick = scaleTickList[i];
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if(tick.major)
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{
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if ((tick.textSize > 0) && (tick.textPos > 0))
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{
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painter.drawText(QPointF(tick.textPos - (tick.textSize/2) - 2, bar.height()/2 - 1), tick.text);
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}
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painter.drawLine(tick.pos, 0, scaleTickList[i].pos, bar.height());
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}
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else
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{
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painter.drawLine(tick.pos, bar.height()/4, scaleTickList[i].pos, bar.height()/2);
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}
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}
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}
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void LevelMeterSignalDB::render(QPainter *painter)
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{
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painter->drawPixmap(rect(), *m_backgroundPixmap);
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QRect bar = rect();
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// Bottom moving gauge
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bar.setTop(0.5 * rect().height() + 2);
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bar.setBottom(0.75*rect().height());
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bar.setRight(rect().right() - (1.0 - m_avgLevel) * rect().width());
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bar.setLeft(1);
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painter->fillRect(bar, m_avgColor[m_colorTheme]);
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bar.setTop(0.75 * rect().height() + 1);
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bar.setBottom(rect().height() - 1);
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bar.setRight(rect().right() - (1.0 - m_decayedPeakLevel) * rect().width());
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painter->fillRect(bar, m_decayedPeakColor[m_colorTheme]);
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bar.setTop(0.5 * rect().height() + 2);
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bar.setBottom(rect().height() - 1);
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bar.setRight(rect().right() - (1.0 - m_peakHoldLevel) * rect().width());
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bar.setLeft(bar.right() - 2);
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painter->fillRect(bar, m_peakColor[m_colorTheme]);
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}
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