diff options
author | Joerg Bornemann <joerg.bornemann@digia.com> | 2012-12-05 13:03:09 +0100 |
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committer | The Qt Project <gerrit-noreply@qt-project.org> | 2012-12-05 18:20:35 +0100 |
commit | 6b4994c265889db2058b7d5850b51ddfc5478754 (patch) | |
tree | 623e53eb8004b6b8ecdb7e2867ab489dde606fac /examples/multimedia/spectrum/app/spectrograph.h | |
parent | 90c8ba233b77ed74012de3b5598a7617672e9d31 (diff) |
centralize and fixup example sources install targets
This follows suit with aeb036e in qtbase.
Change-Id: Ie8580d0a1f38ab9858b0e44c9f99bdc552a1752a
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: hjk <qthjk@ovi.com>
Diffstat (limited to 'examples/multimedia/spectrum/app/spectrograph.h')
-rw-r--r-- | examples/multimedia/spectrum/app/spectrograph.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/examples/multimedia/spectrum/app/spectrograph.h b/examples/multimedia/spectrum/app/spectrograph.h new file mode 100644 index 000000000..470d4e5e2 --- /dev/null +++ b/examples/multimedia/spectrum/app/spectrograph.h @@ -0,0 +1,98 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** 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 Digia Plc 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." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef SPECTROGRAPH_H +#define SPECTROGRAPH_H + +#include "frequencyspectrum.h" + +#include <QWidget> + +/** + * Widget which displays a spectrograph showing the frequency spectrum + * of the window of audio samples most recently analyzed by the Engine. + */ +class Spectrograph : public QWidget +{ + Q_OBJECT + +public: + explicit Spectrograph(QWidget *parent = 0); + ~Spectrograph(); + + void setParams(int numBars, qreal lowFreq, qreal highFreq); + + // QObject + void timerEvent(QTimerEvent *event); + + // QWidget + void paintEvent(QPaintEvent *event); + void mousePressEvent(QMouseEvent *event); + +signals: + void infoMessage(const QString &message, int intervalMs); + +public slots: + void reset(); + void spectrumChanged(const FrequencySpectrum &spectrum); + +private: + int barIndex(qreal frequency) const; + QPair<qreal, qreal> barRange(int barIndex) const; + void updateBars(); + + void selectBar(int index); + +private: + struct Bar { + Bar() : value(0.0), clipped(false) { } + qreal value; + bool clipped; + }; + + QVector<Bar> m_bars; + int m_barSelected; + int m_timerId; + qreal m_lowFreq; + qreal m_highFreq; + FrequencySpectrum m_spectrum; +}; + +#endif // SPECTROGRAPH_H |