/****************************************************************************
**
** 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.
**
** $QT_BEGIN_LICENSE:LGPL3$
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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 "qquickstyleitemslider.h"

QFont QQuickStyleItemSlider::styleFont(QQuickItem *control)
{
    return style()->font(QStyle::CE_ProgressBarLabel, controlSize(control));
}

void QQuickStyleItemSlider::connectToControl()
{
    QQuickStyleItem::connectToControl();
    auto slider = control<QQuickSlider>();
    connect(slider, &QQuickSlider::fromChanged, this, &QQuickStyleItem::markImageDirty);
    connect(slider, &QQuickSlider::toChanged, this, &QQuickStyleItem::markImageDirty);
    connect(slider, &QQuickSlider::positionChanged, this, &QQuickStyleItem::markImageDirty);
    connect(slider, &QQuickSlider::valueChanged, this, &QQuickStyleItem::markImageDirty);
    connect(slider, &QQuickSlider::stepSizeChanged, this, &QQuickStyleItem::markImageDirty);
    connect(slider, &QQuickSlider::pressedChanged, this, &QQuickStyleItem::markImageDirty);
    connect(slider, &QQuickSlider::orientationChanged, this, &QQuickStyleItem::markImageDirty);
}

StyleItemGeometry QQuickStyleItemSlider::calculateGeometry()
{
    QStyleOptionSlider styleOption;
    initStyleOption(styleOption);

    StyleItemGeometry geometry;
    geometry.minimumSize = style()->sizeFromContents(QStyle::CT_Slider, &styleOption, QSize(0, 0));
    geometry.implicitSize = geometry.minimumSize;
    styleOption.rect = QRect(QPoint(0, 0), geometry.implicitSize);
    geometry.layoutRect = style()->subElementRect(QStyle::SE_SliderLayoutItem, &styleOption);
    geometry.ninePatchMargins = style()->ninePatchMargins(QStyle::CC_Slider, &styleOption, geometry.minimumSize);
    geometry.focusFrameRadius = style()->pixelMetric(QStyle::PM_SliderFocusFrameRadius, &styleOption);

    return geometry;
}

void QQuickStyleItemSlider::paintEvent(QPainter *painter)
{
    QStyleOptionSlider styleOption;
    initStyleOption(styleOption);
    style()->drawComplexControl(QStyle::CC_Slider, &styleOption, painter);
}

void QQuickStyleItemSlider::initStyleOption(QStyleOptionSlider &styleOption)
{
    initStyleOptionBase(styleOption);
    auto slider = control<QQuickSlider>();

    styleOption.subControls = m_subControl == Groove ? QStyle::SC_SliderGroove : QStyle::SC_SliderHandle;
    styleOption.activeSubControls = QStyle::SC_None;
    styleOption.orientation = slider->orientation();
    styleOption.tickInterval = slider->stepSize();

    if (slider->isPressed())
        styleOption.state |= QStyle::State_Sunken;

    if (slider->stepSize() == 0) {
        styleOption.minimum = 0;
        styleOption.maximum = 10000;
        styleOption.sliderPosition = slider->position() * styleOption.maximum;
    } else {
        styleOption.minimum = slider->from();
        styleOption.maximum = slider->to();
        styleOption.sliderPosition = slider->value();

        // TODO: add proper API for tickmarks
        const int index = slider->metaObject()->indexOfProperty("qqc2_style_tickPosition");
        if (index != -1) {
            const int tickPosition = slider->metaObject()->property(index).read(slider).toInt();
            styleOption.tickPosition = QStyleOptionSlider::TickPosition(tickPosition);
            if (styleOption.tickPosition != QStyleOptionSlider::NoTicks)
                styleOption.subControls |= QStyle::SC_SliderTickmarks;
        }
    }
}