qquickstyleitemtreeindicator.cpp

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qquickstyleitemtreeindicator.h"
 
QT_BEGIN_NAMESPACE
 
void QQuickStyleItemTreeIndicator::connectToControl() const
{
    QQuickStyleItem::connectToControl();
    auto delegate = control<QQuickTreeViewDelegate>();
    connect(delegate, &QQuickTreeViewDelegate::expandedChanged, this, &QQuickStyleItem::markImageDirty);
}
 
StyleItemGeometry QQuickStyleItemTreeIndicator::calculateGeometry()
{
    QStyleOptionViewItem styleOption;
    initStyleOption(styleOption);
    StyleItemGeometry geometry;
 
    geometry.minimumSize = QSize(20, 20);
    geometry.implicitSize = geometry.minimumSize;
    styleOption.rect = QRect(QPoint(0, 0), geometry.implicitSize);
 
    return geometry;
}
 
void QQuickStyleItemTreeIndicator::paintEvent(QPainter *painter) const
{
    QStyleOptionViewItem styleOption;
    initStyleOption(styleOption);
    style()->drawPrimitive(QStyle::PE_IndicatorBranch, &styleOption, painter);
}
 
void QQuickStyleItemTreeIndicator::initStyleOption(QStyleOptionViewItem &styleOption) const
{
    initStyleOptionBase(styleOption);
    auto delegate = control<QQuickTreeViewDelegate>();
 
    styleOption.state |= QStyle::State_Children;
 
    if (delegate->expanded())
        styleOption.state |= QStyle::State_Open;
}
 
QT_END_NAMESPACE
 
#include "moc_qquickstyleitemtreeindicator.cpp"