diff options
Diffstat (limited to 'examples/multimedia/spectrum/spectrograph.cpp')
| -rw-r--r-- | examples/multimedia/spectrum/spectrograph.cpp | 91 |
1 files changed, 22 insertions, 69 deletions
diff --git a/examples/multimedia/spectrum/spectrograph.cpp b/examples/multimedia/spectrum/spectrograph.cpp index 2ab1127d7..96274b50b 100644 --- a/examples/multimedia/spectrum/spectrograph.cpp +++ b/examples/multimedia/spectrum/spectrograph.cpp @@ -1,54 +1,8 @@ -/**************************************************************************** -** -** Copyright (C) 2017 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** BSD License Usage -** Alternatively, 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 The Qt Company Ltd 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." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2017 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #include "spectrograph.h" + #include <QDebug> #include <QMouseEvent> #include <QPainter> @@ -59,17 +13,16 @@ const int NullIndex = -1; const int BarSelectionInterval = 2000; Spectrograph::Spectrograph(QWidget *parent) - : QWidget(parent) - , m_barSelected(NullIndex) - , m_timerId(NullTimerId) - , m_lowFreq(0.0) - , m_highFreq(0.0) + : QWidget(parent), + m_barSelected(NullIndex), + m_timerId(NullTimerId), + m_lowFreq(0.0), + m_highFreq(0.0) { setMinimumHeight(100); } -Spectrograph::~Spectrograph() -= default; +Spectrograph::~Spectrograph() = default; void Spectrograph::setParams(int numBars, qreal lowFreq, qreal highFreq) { @@ -132,8 +85,8 @@ void Spectrograph::paintEvent(QPaintEvent *event) if (numBars) { const int numHorizontalSections = numBars; QLine line(rect().topLeft(), rect().bottomLeft()); - for (int i=1; i<numHorizontalSections; ++i) { - line.translate(rect().width()/numHorizontalSections, 0); + for (int i = 1; i < numHorizontalSections; ++i) { + line.translate(rect().width() / numHorizontalSections, 0); painter.drawLine(line); } } @@ -141,8 +94,8 @@ void Spectrograph::paintEvent(QPaintEvent *event) // Draw horizontal lines const int numVerticalSections = 10; QLine line(rect().topLeft(), rect().topRight()); - for (int i=1; i<numVerticalSections; ++i) { - line.translate(0, rect().height()/numVerticalSections); + for (int i = 1; i < numVerticalSections; ++i) { + line.translate(0, rect().height() / numVerticalSections); painter.drawLine(line); } @@ -161,7 +114,7 @@ void Spectrograph::paintEvent(QPaintEvent *event) const int leftPaddingWidth = (paddingWidth + gapWidth) / 2; const int barHeight = rect().height() - 2 * gapWidth; - for (int i=0; i<numBars; ++i) { + for (int i = 0; i < numBars; ++i) { const qreal value = m_bars[i].value; Q_ASSERT(value >= 0.0 && value <= 1.0); QRect bar = rect(); @@ -203,7 +156,7 @@ int Spectrograph::barIndex(qreal frequency) const Q_ASSERT(frequency >= m_lowFreq && frequency < m_highFreq); const qreal bandWidth = (m_highFreq - m_lowFreq) / m_bars.count(); const int index = (frequency - m_lowFreq) / bandWidth; - if (index <0 || index >= m_bars.count()) + if (index < 0 || index >= m_bars.count()) Q_ASSERT(false); return index; } @@ -212,7 +165,7 @@ QPair<qreal, qreal> Spectrograph::barRange(int index) const { Q_ASSERT(index >= 0 && index < m_bars.count()); const qreal bandWidth = (m_highFreq - m_lowFreq) / m_bars.count(); - return QPair<qreal, qreal>(index * bandWidth, (index+1) * bandWidth); + return QPair<qreal, qreal>(index * bandWidth, (index + 1) * bandWidth); } void Spectrograph::updateBars() @@ -220,7 +173,7 @@ void Spectrograph::updateBars() m_bars.fill(Bar()); FrequencySpectrum::const_iterator i = m_spectrum.begin(); const FrequencySpectrum::const_iterator end = m_spectrum.end(); - for ( ; i != end; ++i) { + for (; i != end; ++i) { const FrequencySpectrum::Element e = *i; if (e.frequency >= m_lowFreq && e.frequency < m_highFreq) { Bar &bar = m_bars[barIndex(e.frequency)]; @@ -231,11 +184,11 @@ void Spectrograph::updateBars() update(); } -void Spectrograph::selectBar(int index) { +void Spectrograph::selectBar(int index) +{ const QPair<qreal, qreal> frequencyRange = barRange(index); - const QString message = QString("%1 - %2 Hz") - .arg(frequencyRange.first) - .arg(frequencyRange.second); + const QString message = + QStringLiteral("%1 - %2 Hz").arg(frequencyRange.first).arg(frequencyRange.second); emit infoMessage(message, BarSelectionInterval); if (NullTimerId != m_timerId) @@ -246,4 +199,4 @@ void Spectrograph::selectBar(int index) { update(); } - +#include "moc_spectrograph.cpp" |