/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
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** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL3$
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
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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
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
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****************************************************************************/

#include "qquickstyleitemgroupbox.h"

QT_BEGIN_NAMESPACE

QFont QQuickStyleItemGroupBox::styleFont(QQuickItem *control) const
{
    return style()->font(QStyle::CE_HeaderLabel, controlSize(control));
}

StyleItemGeometry QQuickStyleItemGroupBox::calculateGeometry()
{
    QStyleOptionGroupBox styleOption;
    initStyleOption(styleOption);

    StyleItemGeometry geometry;
    geometry.minimumSize = style()->sizeFromContents(QStyle::CT_GroupBox, &styleOption, QSize(0, 0));

    if (!control<QQuickGroupBox>()->title().isEmpty()) {
        // We don't draw the title, but we need to take
        // it into calculation for the control size
        styleOption.text = QStringLiteral(" ");
        styleOption.subControls |= QStyle::SC_GroupBoxLabel;
    }

    geometry.implicitSize = style()->sizeFromContents(QStyle::CT_GroupBox, &styleOption, contentSize());
    styleOption.rect.setSize(geometry.implicitSize);
    geometry.contentRect = style()->subControlRect(QStyle::CC_GroupBox, &styleOption, QStyle::SC_GroupBoxContents);
    geometry.layoutRect = style()->subElementRect(QStyle::SE_GroupBoxLayoutItem, &styleOption);
    geometry.ninePatchMargins = style()->ninePatchMargins(QStyle::CC_GroupBox, &styleOption, geometry.minimumSize);

    const QQuickStyleMargins oldGroupBoxPadding = m_groupBoxPadding;
    const QRect frame = style()->subControlRect(QStyle::CC_GroupBox, &styleOption, QStyle::SC_GroupBoxFrame);
    m_groupBoxPadding = QQuickStyleMargins(QRect(QPoint(), geometry.implicitSize), frame);
    if (m_groupBoxPadding != oldGroupBoxPadding)
        emit groupBoxPaddingChanged();

    const QPointF oldLabelPos = m_labelPos;
    m_labelPos = style()->subControlRect(QStyle::CC_GroupBox, &styleOption, QStyle::SC_GroupBoxLabel).topLeft();
    if (m_labelPos != oldLabelPos)
        emit labelPosChanged();
    return geometry;
}

void QQuickStyleItemGroupBox::paintEvent(QPainter *painter) const
{
    QStyleOptionGroupBox styleOption;
    initStyleOption(styleOption);
    style()->drawComplexControl(QStyle::CC_GroupBox, &styleOption, painter);
}

void QQuickStyleItemGroupBox::initStyleOption(QStyleOptionGroupBox &styleOption) const
{
    initStyleOptionBase(styleOption);
    styleOption.subControls = QStyle::SC_GroupBoxFrame;
    styleOption.lineWidth = 1;
}

QQuickStyleMargins QQuickStyleItemGroupBox::groupBoxPadding() const
{
    return m_groupBoxPadding;
}

QPointF QQuickStyleItemGroupBox::labelPos() const
{
    return m_labelPos;
}

QT_END_NAMESPACE
