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Diffstat (limited to 'chicken-wranglers/src/control/sensormovement.cpp')
| -rw-r--r-- | chicken-wranglers/src/control/sensormovement.cpp | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/chicken-wranglers/src/control/sensormovement.cpp b/chicken-wranglers/src/control/sensormovement.cpp new file mode 100644 index 0000000..4b032a1 --- /dev/null +++ b/chicken-wranglers/src/control/sensormovement.cpp @@ -0,0 +1,192 @@ +/**************************************************************************** +** +** This file is a part of QtChickenWranglers. +** +** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).* +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** 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." +** +****************************************************************************/ + + +#include "sensormovement.h" + +SensorMovement::SensorMovement(QObject *parent) + : QObject(parent), m_direction(Global::DirectionStop), m_startX(0), + m_startY(0), m_minimumRotation(0), + m_threshold(0), m_directionTimeout(0), m_enabled(false) +{ + m_sensor.addFilter(this); + m_sensor.start(); + + setEnabled(true); + + timer.setSingleShot(true); + + connect(&timer, SIGNAL(timeout()), this, SLOT(notifyDirectionChanged())); +} + +void SensorMovement::setEnabled(bool enabled) +{ + if (!m_sensor.isActive()) + return; + + m_enabled = enabled; + + emit enabledChanged(); +} + +void SensorMovement::setMinimumRotation(qreal minimumRotation) +{ + m_minimumRotation = minimumRotation; + + emit minimumRotationChanged(); +} + +void SensorMovement::setThreshold(qreal threshold) +{ + m_threshold = threshold; + + emit thresholdChanged(); +} + +void SensorMovement::setDirectionTimeout(int directionTimeout) +{ + m_directionTimeout = directionTimeout; + + emit directionTimeoutChanged(); +} + +void SensorMovement::resetStartPosition() +{ + QAccelerometerReading *reading = m_sensor.reading(); + + if (!reading) + return; + + m_startX = reading->x(); + m_startY = reading->y(); +} + +bool SensorMovement::filter(QAccelerometerReading *reading) +{ + if (!m_enabled) + return true; + + Global::Direction nextDirection; + // XXX: Axis are inverted on N900, thanks to the fact that + // is a landscape device by definition. + if (Global::environment() == Global::Maemo) + nextDirection = calculateDirectionMaemo5(reading->x(), reading->y()); + else + nextDirection = calculateDirection(reading->x(), reading->y()); + + if (nextDirection != m_direction) { + m_direction = nextDirection; + + timer.stop(); + timer.start(m_directionTimeout); + } + + return true; +} + +Global::Direction SensorMovement::calculateDirection(qreal x, qreal y) +{ + m_actualY = y - m_startY; + m_actualX = x - m_startX; + + if (qAbs(m_actualX) > qAbs(m_actualY)) { + if (m_actualX > 0) { + if (m_actualX > m_minimumRotation + m_threshold) + return Global::DirectionDown; + else if (m_actualX < m_minimumRotation - m_threshold && m_actualX > m_threshold) + return Global::DirectionStop; + } else { + if (m_actualX < -m_minimumRotation - m_threshold) + return Global::DirectionUp; + else if (m_actualX > -m_minimumRotation + m_threshold && m_actualX < -m_threshold) + return Global::DirectionStop; + } + } else if (m_actualY > 0) { + if (m_actualY > m_minimumRotation + m_threshold) + return Global::DirectionRight; + else if (m_actualY < m_minimumRotation - m_threshold && m_actualY > m_threshold) + return Global::DirectionStop; + } else { + if (m_actualY < -m_minimumRotation - m_threshold) + return Global::DirectionLeft; + else if (m_actualY > -m_minimumRotation + m_threshold && m_actualY < -m_threshold) + return Global::DirectionStop; + } + + return m_direction; +} + +Global::Direction SensorMovement::calculateDirectionMaemo5(qreal x, qreal y) +{ + m_actualY = y - m_startY; + m_actualX = x - m_startX; + + if (qAbs(m_actualX) > qAbs(m_actualY)) { + if (m_actualX > 0) { + if (m_actualX > m_minimumRotation + m_threshold) + return Global::DirectionLeft; + else if (m_actualX < m_minimumRotation - m_threshold && m_actualX > m_threshold) + return Global::DirectionStop; + } else { + if (m_actualX < -m_minimumRotation - m_threshold) + return Global::DirectionRight; + else if (m_actualX > -m_minimumRotation + m_threshold && m_actualX < -m_threshold) + return Global::DirectionStop; + } + } else if (m_actualY > 0) { + if (m_actualY > m_minimumRotation + m_threshold) + return Global::DirectionDown; + else if (m_actualY < m_minimumRotation - m_threshold && m_actualY > m_threshold) + return Global::DirectionStop; + } else { + if (m_actualY < -m_minimumRotation - m_threshold) + return Global::DirectionUp; + else if (m_actualY > -m_minimumRotation + m_threshold && m_actualY < -m_threshold) + return Global::DirectionStop; + } + + return m_direction; +} + +void SensorMovement::notifyDirectionChanged() +{ + emit directionChanged(m_direction); +} |