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Diffstat (limited to 'demos/mobile/guitartuner/src/guitartunerui.cpp')
| -rw-r--r-- | demos/mobile/guitartuner/src/guitartunerui.cpp | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/demos/mobile/guitartuner/src/guitartunerui.cpp b/demos/mobile/guitartuner/src/guitartunerui.cpp new file mode 100644 index 0000000..9d59d7c --- /dev/null +++ b/demos/mobile/guitartuner/src/guitartunerui.cpp @@ -0,0 +1,341 @@ +/**************************************************************************** +** +** 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 QtDeclarative module 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 <QTimer> + +#include "guitartunerui.h" +#include "ui_guitartunerui.h" + +GuitarTunerUI::GuitarTunerUI(QWidget *parent) : + QWidget(parent), + ui(new Ui::GuitarTunerUI), + m_maximumPrecision(0) +{ + ui->setupUi(this); + + // Set up the class attributes to proper values. + m_outputActive = false; + m_muted = false; + m_outputVolumeLevel = getVolumeFromSoundSlider(); + m_inputVolumeLevel = 1.0 - m_outputVolumeLevel; + + // Set up the current tone, the frequency, and the name for it. + m_currentToneIndex = 5; + updateFrequencyByToneIndex(m_currentToneIndex); + + // Connect the signals from UI into proper slots. + connect(ui->soundSlider, SIGNAL(valueChanged(int)), + SLOT(changeVolume())); + connect(ui->soundButton, SIGNAL(toggled(bool)), + SLOT(toggleSound(bool))); + connect(ui->modeButton, SIGNAL(clicked()), + SLOT(toggleInputOrOutput())); + connect(ui->buttonNext, SIGNAL(clicked()), SLOT(next())); + connect(ui->buttonPrev, SIGNAL(clicked()), SLOT(prev())); + + // Initialise up the UI by calling toggleInputOrOutput + // for the first time. + toggleInputOrOutput(); +} + +GuitarTunerUI::~GuitarTunerUI() +{ + delete ui; +} + +void GuitarTunerUI::changeEvent(QEvent *e) +{ + QWidget::changeEvent(e); + switch (e->type()) { + case QEvent::LanguageChange: + ui->retranslateUi(this); + break; + default: + break; + } +} + +/** + * Returns a value from 0 to 1, representing the volume. + */ +qreal GuitarTunerUI::getVolumeFromSoundSlider() const +{ + qreal value = ui->soundSlider->value(); + return value/ui->soundSlider->maximum(); +} + +/** + * Updates the m_currentToneFrequency and m_currentToneString, + * according to the given index. Also updates the UI. + */ +void GuitarTunerUI::updateFrequencyByToneIndex(int index) +{ + + switch (index) { + case 0: { + m_currentToneFrequency = FrequencyE; + m_currentToneString = "E"; + break; + } + case 1: { + m_currentToneFrequency = FrequencyA; + m_currentToneString = "A"; + break; + } + case 2: { + m_currentToneFrequency = FrequencyD; + m_currentToneString = "D"; + break; + } + case 3: { + m_currentToneFrequency = FrequencyG; + m_currentToneString = "G"; + break; + } + case 4: { + m_currentToneFrequency = FrequencyB; + m_currentToneString = "B"; + break; + } + case 5: { + m_currentToneFrequency = FrequencyE2; + m_currentToneString = "e"; + break; + } + default: { + qDebug() << "invalid index!" << index; + } + } + // Set the noteLabel text according to the current tone. + ui->noteLabel->setText(m_currentToneString); +} + +/** + * Returns the volume. + */ +qreal GuitarTunerUI::getVolume() const +{ + return m_outputVolumeLevel; +} + +/** + * Returns true if the sound is muted. + */ +bool GuitarTunerUI::getMuteState() const +{ + return m_muted; +} + + +/** + * Returns the microphone sensitivity. + */ +qreal GuitarTunerUI::getMicrophoneSensitivity() const +{ + return m_inputVolumeLevel; +} + +/** + * Returns whether the input mode is active. + */ +bool GuitarTunerUI::isInputModeActive() const +{ + return !m_outputActive; +} + +/** + * Returns the current target frequency. + */ +qreal GuitarTunerUI::getFrequency() const +{ + return m_currentToneFrequency; +} + +/** + * Toggles the sound according to the parameter. + * Has no effect if output is not active. + */ +void GuitarTunerUI::toggleSound(bool noSound) +{ + if (!m_outputActive) { + return; + } + m_muted = noSound; + emit muteChanged(m_muted); +} + +/** + * Changes the volume or microphone sensitivity. + */ +void GuitarTunerUI::changeVolume() +{ + qreal resultingAmplitude = getVolumeFromSoundSlider(); + qDebug() << "resultingAmplitude" << resultingAmplitude; + if (m_outputActive) { + m_outputVolumeLevel = resultingAmplitude; + emit volumeChanged(resultingAmplitude); + } + else { + m_inputVolumeLevel = resultingAmplitude; + emit microphoneSensitivityChanged(1.0-resultingAmplitude); + } +} + +/** + * Toggles input or output, depending of the current state. + */ +void GuitarTunerUI::toggleInputOrOutput() +{ + // If output mode is active: + if (m_outputActive) { + // Change UI to correspond to the input mode. + m_outputActive = false; + ui->soundSlider->setValue(m_inputVolumeLevel*100); + ui->soundButton->setDisabled(true); + ui->soundButton->hide(); + ui->micSensitivityLabel->show(); + emit modeChanged(true); + ui->modeButton->setText("To tone mode"); + } + // Else: + else { + // Change UI to correspond to the output mode. + m_outputActive = true; + ui->soundSlider->setValue(m_outputVolumeLevel*100); + ui->soundButton->setDisabled(false); + ui->micSensitivityLabel->hide(); + ui->soundButton->show(); + emit modeChanged(false); + ui->modeButton->setText("To listen mode"); + } +} + +/** + * Receives the low voice signal. + */ +void GuitarTunerUI::lowVoice() +{ + if (ui->noteLabel->font().bold()) { + QFont font; + font.setBold(false); + font.setUnderline(false); + ui->noteLabel->setFont(font); + } +} + +/** + * Receives the voice difference signal. + * The difference is qreal, where increase of 1 corresponds + * to increase of 1 tone to the target frequency. + */ +void GuitarTunerUI::voiceDifference(qreal difference) +{ + if (ui->noteLabel->font().bold()) { + QFont font; + font.setBold(false); + font.setUnderline(false); + ui->noteLabel->setFont(font); + } + ui->correctSoundSlider->setValue(difference*m_maximumPrecision); +} + +/** + * Receives the correct frequency signal. + * Makes the UI to visualize correct frequency event. + */ +void GuitarTunerUI::correctFrequencyObtained() +{ + qDebug() << "CORRECT FREQUENCY"; + QFont font; + font.setBold(true); + font.setUnderline(true); + ui->noteLabel->setFont(font); +} + +/** + * Sets up the maximum voice difference. + */ +void GuitarTunerUI::setMaximumVoiceDifference(int max) +{ + // Assert that the maximum precision is known. + Q_ASSERT(m_maximumPrecision != 0); + // Set the maximum and minimum values of the correctSoundSlider + // to the +- max*m_maximumPrecision, and set the tick interval + // to be m_maximumPrecision. + ui->correctSoundSlider->setMaximum(max*m_maximumPrecision); + ui->correctSoundSlider->setMinimum(-max*m_maximumPrecision); + ui->correctSoundSlider->setTickInterval(max*m_maximumPrecision); +} + +/** + * Stores the maximum precision per note. Used to setup the + * correct sound slider. + */ +void GuitarTunerUI::setMaximumPrecisionPerNote(int max) +{ + m_maximumPrecision = max; +} + +/** + * Changes the tone to the next value. + */ +void GuitarTunerUI::next() +{ + changeTone((m_currentToneIndex + 1) % 6); +} + +/** + * Changes the tone to the previous value. + */ +void GuitarTunerUI::prev() +{ + changeTone((m_currentToneIndex + 5) % 6); +} + +/** + * Changes the tone according to the new index. + */ +void GuitarTunerUI::changeTone(int newIndex) +{ + m_currentToneIndex = newIndex; + updateFrequencyByToneIndex(m_currentToneIndex); + qDebug() << "targetFrequencyChanged" << m_currentToneFrequency; + emit targetFrequencyChanged(m_currentToneFrequency); +} |