Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
141 lines
4.4 KiB
C++
141 lines
4.4 KiB
C++
/****************************************************************************
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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 "progressbar.h"
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#include "spectrum.h"
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#include <QPainter>
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ProgressBar::ProgressBar(QWidget *parent)
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: QWidget(parent)
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, m_bufferLength(0)
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, m_recordPosition(0)
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, m_playPosition(0)
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, m_windowPosition(0)
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, m_windowLength(0)
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{
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setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
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setMinimumHeight(30);
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#ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM
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setAutoFillBackground(false);
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#endif
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}
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ProgressBar::~ProgressBar()
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{
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}
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void ProgressBar::reset()
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{
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m_bufferLength = 0;
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m_recordPosition = 0;
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m_playPosition = 0;
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m_windowPosition = 0;
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m_windowLength = 0;
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update();
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}
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void ProgressBar::paintEvent(QPaintEvent * /*event*/)
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{
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QPainter painter(this);
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QColor bufferColor(0, 0, 255);
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QColor windowColor(0, 255, 0);
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#ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM
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bufferColor.setAlphaF(0.5);
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windowColor.setAlphaF(0.5);
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#else
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painter.fillRect(rect(), Qt::black);
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#endif
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if (m_bufferLength) {
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QRect bar = rect();
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const qreal play = qreal(m_playPosition) / m_bufferLength;
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bar.setLeft(rect().left() + play * rect().width());
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const qreal record = qreal(m_recordPosition) / m_bufferLength;
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bar.setRight(rect().left() + record * rect().width());
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painter.fillRect(bar, bufferColor);
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QRect window = rect();
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const qreal windowLeft = qreal(m_windowPosition) / m_bufferLength;
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window.setLeft(rect().left() + windowLeft * rect().width());
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const qreal windowWidth = qreal(m_windowLength) / m_bufferLength;
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window.setWidth(windowWidth * rect().width());
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painter.fillRect(window, windowColor);
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}
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}
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void ProgressBar::bufferLengthChanged(qint64 bufferSize)
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{
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m_bufferLength = bufferSize;
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m_recordPosition = 0;
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m_playPosition = 0;
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m_windowPosition = 0;
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m_windowLength = 0;
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repaint();
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}
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void ProgressBar::recordPositionChanged(qint64 recordPosition)
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{
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Q_ASSERT(recordPosition >= 0);
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Q_ASSERT(recordPosition <= m_bufferLength);
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m_recordPosition = recordPosition;
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repaint();
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}
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void ProgressBar::playPositionChanged(qint64 playPosition)
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{
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Q_ASSERT(playPosition >= 0);
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Q_ASSERT(playPosition <= m_bufferLength);
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m_playPosition = playPosition;
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repaint();
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}
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void ProgressBar::windowChanged(qint64 position, qint64 length)
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{
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Q_ASSERT(position >= 0);
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Q_ASSERT(position <= m_bufferLength);
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Q_ASSERT(position + length <= m_bufferLength);
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m_windowPosition = position;
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m_windowLength = length;
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repaint();
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}
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