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**
** Copyright (C) 2017 The Qt Company Ltd.
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** This file is part of the Qt Quick Templates 2 module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
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****************************************************************************/

#include "qquickroundbutton_p.h"

#include <QtQuickTemplates2/private/qquickbutton_p_p.h>

QT_BEGIN_NAMESPACE

/*!
    \qmltype RoundButton
    \inherits Button
    \instantiates QQuickRoundButton
    \inqmlmodule QtQuick.Controls
    \since 5.8
    \ingroup qtquickcontrols2-buttons
    \brief A push-button control with rounded corners that can be clicked by the user.

    \image qtquickcontrols2-roundbutton.png

    RoundButton is identical to \l Button, except that it has a \l radius property
    which allows the corners to be rounded without having to customize the
    \l background.

    \snippet qtquickcontrols2-roundbutton.qml 1

    \sa {Customizing RoundButton}, {Button Controls}
*/

class QQuickRoundButtonPrivate : public QQuickButtonPrivate
{
    Q_DECLARE_PUBLIC(QQuickRoundButton)

public:
    QQuickRoundButtonPrivate();

    qreal radius;
    bool explicitRadius;

    void setRadius(qreal newRadius = -1.0);
};

QQuickRoundButtonPrivate::QQuickRoundButtonPrivate() :
    radius(0),
    explicitRadius(false)
{
}

void QQuickRoundButtonPrivate::setRadius(qreal newRadius)
{
    Q_Q(QQuickRoundButton);
    const qreal oldRadius = radius;
    if (newRadius < 0)
        radius = qMax<qreal>(0, qMin(width, height) / 2);
    else
        radius = newRadius;

    if (!qFuzzyCompare(radius, oldRadius))
        emit q->radiusChanged();
}

QQuickRoundButton::QQuickRoundButton(QQuickItem *parent) :
    QQuickButton(*(new QQuickRoundButtonPrivate), parent)
{
}

/*!
    \qmlproperty real QtQuick.Controls::RoundButton::radius

    This property holds the radius of the button.

    To create a relatively square button that has slightly rounded corners,
    use a small value, such as \c 3.

    To create a completely circular button (the default), use a value that is
    equal to half of the width or height of the button, and make the button's
    width and height identical.

    To reset this property back to the default value, set its value to
    \c undefined.
*/
qreal QQuickRoundButton::radius() const
{
    Q_D(const QQuickRoundButton);
    return d->radius;
}

void QQuickRoundButton::setRadius(qreal radius)
{
    Q_D(QQuickRoundButton);
    d->explicitRadius = true;
    d->setRadius(radius);
}

void QQuickRoundButton::resetRadius()
{
    Q_D(QQuickRoundButton);
    d->explicitRadius = false;
    d->setRadius();
}

void QQuickRoundButton::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)
{
    Q_D(QQuickRoundButton);
    QQuickControl::geometryChanged(newGeometry, oldGeometry);
    if (!d->explicitRadius)
        d->setRadius();
}

QT_END_NAMESPACE