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**
** Copyright (C) 2015 The Qt Company Ltd.
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** This file is part of the Qt Quick Controls module of the Qt Toolkit.
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****************************************************************************/

#include "qquickbusyindicator_p.h"
#include "qquickcontrol_p_p.h"

QT_BEGIN_NAMESPACE

/*!
    \qmltype BusyIndicator
    \inherits Control
    \instantiates QQuickBusyIndicator
    \inqmlmodule QtQuick.Controls
    \ingroup indicators
    \brief A busy indicator.

    \image qtquickcontrols2-busyindicator.gif

    The busy indicator should be used to indicate activity while content is
    being loaded or the UI is blocked waiting for a resource to become available.

    The following snippet shows how to use the BusyIndicator:

    \qml
    BusyIndicator {
        running: image.status === Image.Loading
    }
    \endqml

    You can create a custom appearance for a Busy Indicator by
    assigning an item to the \l indicator property.

    The default implementation uses this QML item as indicator:
    \snippet BusyIndicator.qml indicator
*/

class QQuickBusyIndicatorPrivate : public QQuickControlPrivate
{
public:
    QQuickBusyIndicatorPrivate() : running(true), indicator(Q_NULLPTR) { }

    bool running;
    QQuickItem *indicator;
};

QQuickBusyIndicator::QQuickBusyIndicator(QQuickItem *parent) :
    QQuickControl(*(new QQuickBusyIndicatorPrivate), parent)
{
    setAccessibleRole(0x00000027); //QAccessible::Indicator
}

/*!
    \qmlproperty bool QtQuickControls2::BusyIndicator::running

    This property holds whether the busy indicator is currently indicating
    activity.

    \note The indicator is only visible when this property is set to \c true.

    The default value is \c true.

*/
bool QQuickBusyIndicator::isRunning() const
{
    Q_D(const QQuickBusyIndicator);
    return d->running;
}

void QQuickBusyIndicator::setRunning(bool running)
{
    Q_D(QQuickBusyIndicator);
    if (d->running != running) {
        d->running = running;
        emit runningChanged();
    }
}

/*!
    \qmlproperty Item QtQuickControls2::BusyIndicator::indicator

    This property holds the \l[QML]{Item}, which graphically implements the busy indicator.
*/
QQuickItem *QQuickBusyIndicator::indicator() const
{
    Q_D(const QQuickBusyIndicator);
    return d->indicator;
}

void QQuickBusyIndicator::setIndicator(QQuickItem *indicator)
{
    Q_D(QQuickBusyIndicator);
    if (d->indicator != indicator) {
        delete d->indicator;
        d->indicator = indicator;
        if (indicator && !indicator->parentItem())
            indicator->setParentItem(this);
        emit indicatorChanged();
    }
}

QT_END_NAMESPACE