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Diffstat (limited to 'examples/multimedia/audiorecorder/qaudiolevel.cpp')
-rw-r--r-- | examples/multimedia/audiorecorder/qaudiolevel.cpp | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/examples/multimedia/audiorecorder/qaudiolevel.cpp b/examples/multimedia/audiorecorder/qaudiolevel.cpp new file mode 100644 index 000000000..1ae034628 --- /dev/null +++ b/examples/multimedia/audiorecorder/qaudiolevel.cpp @@ -0,0 +1,68 @@ +/**************************************************************************** +** +** 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." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qaudiolevel.h" +#include <QPainter> + +QAudioLevel::QAudioLevel(QWidget *parent) + : QWidget(parent) + , m_level(0.0) +{ +} + +void QAudioLevel::setLevel(qreal level) +{ + if (m_level != level) { + m_level = level; + update(); + } +} + +void QAudioLevel::paintEvent(QPaintEvent *event) +{ + Q_UNUSED(event); + + QPainter painter(this); + // draw level + qreal widthLevel = m_level * width(); + painter.fillRect(0, 0, widthLevel, height(), Qt::red); + // clear the rest of the control + painter.fillRect(widthLevel, 0, width(), height(), Qt::black); +} |