path: root/src/imports/multimedia/qdeclarativecamerafocus.cpp

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#include "qdeclarativecamera_p.h"
#include "qdeclarativecamerafocus_p.h"

QT_BEGIN_NAMESPACE

/*!
    \qmlclass CameraFocus QDeclarativeCameraFocus
    \since 4.0
    \brief The CameraFocus element provides interface for focus related camera settings.
    \ingroup qml-multimedia

    This element is part of the \bold{QtMultimedia 4.0} module.

    It should not be constructed separately but provided by Camera.focus.

    \qml
    import QtQuick 2.0
    import QtMultimedia 4.0

    Camera {
        id: camera

        focus {
            focusMode: Camera.FocusMacro
            focusPointMode: Camera.FocusPointCustom
            customFocusPoint: Qt.point(0.2, 0.2) //focus to top-left corner
        }
    }

    \endqml
*/

/*!
    \class QDeclarativeCameraFocus
    \brief The CameraFocus element provides interface for focus related camera settings.
*/

/*!
    Construct a declarative camera focus object using \a parent object.
 */

QDeclarativeCameraFocus::QDeclarativeCameraFocus(QCamera *camera, QObject *parent) :
    QObject(parent)
{
    m_focus = camera->focus();
    m_focusZones = new FocusZonesModel(this);

    updateFocusZones();

    connect(m_focus, SIGNAL(focusZonesChanged()), SLOT(updateFocusZones()));
}

QDeclarativeCameraFocus::~QDeclarativeCameraFocus()
{
}


/*!
    \qmlproperty Camera::FocusModes CameraFocus::focusMode
    \property QDeclarativeCameraFocus::focusMode

    The current camera focus mode.

    It's possible to combine multiple Camera::FocusMode values,
    for example Camera.FocusMacro + Camera.FocusContinuous.
*/
QDeclarativeCamera::FocusModes QDeclarativeCameraFocus::focusMode() const
{
    return QDeclarativeCamera::FocusModes(m_focus->focusMode());
}

bool QDeclarativeCameraFocus::isFocusModeSupported(QDeclarativeCamera::FocusModes mode) const
{
    return m_focus->isFocusModeSupported(QCameraFocus::FocusMode(int(mode)));
}

void QDeclarativeCameraFocus::setFocusMode(QDeclarativeCamera::FocusModes mode)
{
    m_focus->setFocusMode(QCameraFocus::FocusMode(int(mode)));
}

/*!
    \qmlproperty CameraFocus::FocusPointMode CameraFocus::focusPointMode
    \property QDeclarativeCameraFocus::focusPointMode

    The current camera focus point mode.
*/
QDeclarativeCamera::FocusPointMode QDeclarativeCameraFocus::focusPointMode() const
{
    return QDeclarativeCamera::FocusPointMode(m_focus->focusPointMode());
}

void QDeclarativeCameraFocus::setFocusPointMode(QDeclarativeCamera::FocusPointMode mode)
{
    if (mode != focusPointMode()) {
        m_focus->setFocusPointMode(QCameraFocus::FocusPointMode(mode));
        emit focusPointModeChanged(focusPointMode());
    }
}

bool QDeclarativeCameraFocus::isFocusPointModeSupported(QDeclarativeCamera::FocusPointMode mode) const
{
    return m_focus->isFocusPointModeSupported(QCameraFocus::FocusPointMode(mode));
}

/*!
  \qmlproperty QPointF CameraFocus::customFocusPoint
  \property QDeclarativeCameraFocus::customFocusPoint

  Position of custom focus point, in relative frame coordinates:
  QPointF(0,0) points to the left top frame point, QPointF(0.5,0.5) points to the frame center.

  Custom focus point is used only in FocusPointCustom focus mode.
*/

QPointF QDeclarativeCameraFocus::customFocusPoint() const
{
    return m_focus->customFocusPoint();
}

void QDeclarativeCameraFocus::setCustomFocusPoint(const QPointF &point)
{
    if (point != customFocusPoint()) {
        m_focus->setCustomFocusPoint(point);
        emit customFocusPointChanged(customFocusPoint());
    }
}

/*!
  \qmlproperty QPointF CameraFocus::focusZones
  \property QDeclarativeCameraFocus::focusZones

  List of current camera focus zones,
  each including area specified in the same coordinates as \l customFocusPoint
  and zone status.

  \qml

  VideoOutput {
      id: viewfinder
      source: camera

      //display focus areas on camera viewfinder:
      Repeater {
            model: camera.focus.focusZones

            Rectangle {
                border {
                    width: 2
                    color: status == CameraFocus.Focused ? "green" : "white"
                }
                color: "transparent"

                x: area.x * viewfinder.width
                y: area.y * viewfinder.height
                width: area.width * viewfinder.width
                height: area.height * viewfinder.height
            }
      }
  }
  \endqml
*/

QAbstractListModel *QDeclarativeCameraFocus::focusZones() const
{
    return m_focusZones;
}

/*! \internal */
void QDeclarativeCameraFocus::updateFocusZones()
{
    m_focusZones->setFocusZones(m_focus->focusZones());
}


FocusZonesModel::FocusZonesModel(QObject *parent)
    :QAbstractListModel(parent)
{
    QHash<int, QByteArray> roles;
    roles[StatusRole] = "status";
    roles[AreaRole] = "area";
    setRoleNames(roles);
}

int FocusZonesModel::rowCount(const QModelIndex &parent) const
{
    if (parent == QModelIndex())
        return m_focusZones.count();

    return 0;
}

QVariant FocusZonesModel::data(const QModelIndex &index, int role) const
{
    if (index.row() < 0 || index.row() > m_focusZones.count())
        return QVariant();

    QCameraFocusZone zone = m_focusZones.value(index.row());

    if (role == StatusRole)
        return zone.status();

    if (role == AreaRole)
        return zone.area();

    return QVariant();
}

void FocusZonesModel::setFocusZones(const QCameraFocusZoneList &zones)
{
    beginResetModel();
    m_focusZones = zones;
    endResetModel();
}

QT_END_NAMESPACE

#include "moc_qdeclarativecamerafocus_p.cpp"