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Diffstat (limited to 'examples/spectrum/app/progressbar.cpp')
-rw-r--r-- | examples/spectrum/app/progressbar.cpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/examples/spectrum/app/progressbar.cpp b/examples/spectrum/app/progressbar.cpp new file mode 100644 index 000000000..46605101f --- /dev/null +++ b/examples/spectrum/app/progressbar.cpp @@ -0,0 +1,140 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "progressbar.h" +#include "spectrum.h" +#include <QPainter> + +ProgressBar::ProgressBar(QWidget *parent) + : QWidget(parent) + , m_bufferLength(0) + , m_recordPosition(0) + , m_playPosition(0) + , m_windowPosition(0) + , m_windowLength(0) +{ + setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed); + setMinimumHeight(30); +#ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM + setAutoFillBackground(false); +#endif +} + +ProgressBar::~ProgressBar() +{ + +} + +void ProgressBar::reset() +{ + m_bufferLength = 0; + m_recordPosition = 0; + m_playPosition = 0; + m_windowPosition = 0; + m_windowLength = 0; + update(); +} + +void ProgressBar::paintEvent(QPaintEvent * /*event*/) +{ + QPainter painter(this); + + QColor bufferColor(0, 0, 255); + QColor windowColor(0, 255, 0); + +#ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM + bufferColor.setAlphaF(0.5); + windowColor.setAlphaF(0.5); +#else + painter.fillRect(rect(), Qt::black); +#endif + + if (m_bufferLength) { + QRect bar = rect(); + const qreal play = qreal(m_playPosition) / m_bufferLength; + bar.setLeft(rect().left() + play * rect().width()); + const qreal record = qreal(m_recordPosition) / m_bufferLength; + bar.setRight(rect().left() + record * rect().width()); + painter.fillRect(bar, bufferColor); + + QRect window = rect(); + const qreal windowLeft = qreal(m_windowPosition) / m_bufferLength; + window.setLeft(rect().left() + windowLeft * rect().width()); + const qreal windowWidth = qreal(m_windowLength) / m_bufferLength; + window.setWidth(windowWidth * rect().width()); + painter.fillRect(window, windowColor); + } +} + +void ProgressBar::bufferLengthChanged(qint64 bufferSize) +{ + m_bufferLength = bufferSize; + m_recordPosition = 0; + m_playPosition = 0; + m_windowPosition = 0; + m_windowLength = 0; + repaint(); +} + +void ProgressBar::recordPositionChanged(qint64 recordPosition) +{ + Q_ASSERT(recordPosition >= 0); + Q_ASSERT(recordPosition <= m_bufferLength); + m_recordPosition = recordPosition; + repaint(); +} + +void ProgressBar::playPositionChanged(qint64 playPosition) +{ + Q_ASSERT(playPosition >= 0); + Q_ASSERT(playPosition <= m_bufferLength); + m_playPosition = playPosition; + repaint(); +} + +void ProgressBar::windowChanged(qint64 position, qint64 length) +{ + Q_ASSERT(position >= 0); + Q_ASSERT(position <= m_bufferLength); + Q_ASSERT(position + length <= m_bufferLength); + m_windowPosition = position; + m_windowLength = length; + repaint(); +} |