qt-everywhere-src-5.14.1/qtmultimedia/src/imports/multimedia/qdeclarativecameraviewfinder.cpp

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#include "qdeclarativecamera_p.h"
#include "qdeclarativecameraviewfinder_p.h"

#include <QtMultimedia/qcameraviewfindersettingscontrol.h>


QT_BEGIN_NAMESPACE

QDeclarativeCameraViewfinder::QDeclarativeCameraViewfinder(QCamera *camera, QObject *parent)
    : QObject(parent)
    , m_camera(camera)
{
    connect(m_camera, &QCamera::statusChanged,
            this, &QDeclarativeCameraViewfinder::_q_cameraStatusChanged);
}

QDeclarativeCameraViewfinder::~QDeclarativeCameraViewfinder()
{
}

QSize QDeclarativeCameraViewfinder::resolution() const
{
    return m_settings.resolution();
}

void QDeclarativeCameraViewfinder::setResolution(const QSize &res)
{
    if (res != m_settings.resolution()) {
        m_settings = m_camera->viewfinderSettings();
        m_settings.setResolution(res);
        m_camera->setViewfinderSettings(m_settings);
        emit resolutionChanged();
    }
}

qreal QDeclarativeCameraViewfinder::minimumFrameRate() const
{
    return m_settings.minimumFrameRate();
}

void QDeclarativeCameraViewfinder::setMinimumFrameRate(qreal frameRate)
{
    if (frameRate != minimumFrameRate()) {
        m_settings = m_camera->viewfinderSettings();
        m_settings.setMinimumFrameRate(frameRate);
        m_camera->setViewfinderSettings(m_settings);
        emit minimumFrameRateChanged();
    }
}

qreal QDeclarativeCameraViewfinder::maximumFrameRate() const
{
    return m_settings.maximumFrameRate();
}

void QDeclarativeCameraViewfinder::setMaximumFrameRate(qreal frameRate)
{
    if (frameRate != maximumFrameRate()) {
        m_settings = m_camera->viewfinderSettings();
        m_settings.setMaximumFrameRate(frameRate);
        m_camera->setViewfinderSettings(m_settings);
        emit maximumFrameRateChanged();
    }
}

void QDeclarativeCameraViewfinder::_q_cameraStatusChanged(QCamera::Status status)
{
    // Settings values might change when the camera starts, for example if the settings are
    // undefined, if unsupported values were set or if the settings conflict with capture settings.
    // They might also change on LoadedStatus, for example reverting to values that were set by the
    // user.
    if (status == QCamera::ActiveStatus || status == QCamera::LoadedStatus) {
        QCameraViewfinderSettings oldSettings = m_settings;
        m_settings = m_camera->viewfinderSettings();
        if (oldSettings.resolution() != m_settings.resolution())
            emit resolutionChanged();
        if (oldSettings.minimumFrameRate() != m_settings.minimumFrameRate())
            emit minimumFrameRateChanged();
        if (oldSettings.maximumFrameRate() != m_settings.maximumFrameRate())
            emit maximumFrameRateChanged();
    }
}

QT_END_NAMESPACE

#include "moc_qdeclarativecameraviewfinder_p.cpp"