TabBarQuick.cpp

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/*
  This file is part of KDDockWidgets.
 
  SPDX-FileCopyrightText: 2019-2022 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
  Author: Sérgio Martins <sergio.martins@kdab.com>
 
  SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
 
  Contact KDAB at <info@kdab.com> for commercial licensing options.
*/
 
#include "TabBarQuick_p.h"
 
#include <QMetaObject>
#include <QMouseEvent>
 
using namespace KDDockWidgets;
 
TabBarQuick::TabBarQuick(TabWidget *parent)
    : QWidgetAdapter(parent->asWidget())
    , TabBar(this, parent)
{
}
 
int TabBarQuick::tabAt(QPoint p) const
{
    // QtQuick's TabBar doesn't provide any API for this.
    // So ask its *internal* ListView instead.
 
    if (!m_tabBarQmlItem) {
        qWarning() << Q_FUNC_INFO << "No visual tab bar item yet";
        return -1;
    }
 
    if (QQuickItem *internalListView = listView()) {
        int index = -1;
        QMetaObject::invokeMethod(internalListView, "indexAt", Q_RETURN_ARG(int, index),
                                  Q_ARG(double, p.x()), Q_ARG(double, p.y()));
 
        return index;
    } else {
        qWarning() << Q_FUNC_INFO << "Couldn't find the internal ListView";
    }
 
    return -1;
}
 
QQuickItem *TabBarQuick::tabBarQmlItem() const
{
    return m_tabBarQmlItem;
}
 
void TabBarQuick::setTabBarQmlItem(QQuickItem *item)
{
    m_tabBarQmlItem = item;
}
 
QString TabBarQuick::text(int index) const
{
    if (QQuickItem *item = tabAt(index))
        return item->property("text").toString();
 
    return {};
}
 
QRect TabBarQuick::rectForTab(int index) const
{
    if (QQuickItem *item = tabAt(index))
        return item->boundingRect().toRect();
 
    return {};
}
 
bool TabBarQuick::event(QEvent *ev)
{
    switch (ev->type()) {
    case QEvent::MouseButtonDblClick:
    case QEvent::MouseButtonPress: {
        if (m_tabBarQmlItem) {
            auto me = static_cast<QMouseEvent *>(ev);
            m_tabBarQmlItem->setProperty("currentIndex", tabAt(me->pos()));
            if (ev->type() == QEvent::MouseButtonPress)
                TabBar::onMousePress(me->pos());
            else
                TabBar::onMouseDoubleClick(me->pos());
        }
 
        break;
    }
    default:
        break;
    }
 
    return QWidgetAdapter::event(ev);
}
 
QQuickItem *TabBarQuick::tabAt(int index) const
{
    QQuickItem *view = listView();
    if (!view)
        return nullptr;
 
    QQuickItem *item = nullptr;
    QMetaObject::invokeMethod(view, "itemAtIndex", Q_RETURN_ARG(QQuickItem*, item),
                              Q_ARG(int, index));
 
    return item;
}
 
QQuickItem *TabBarQuick::listView() const
{
    // Returns the internal ListView of the TabBar
 
    if (!m_tabBarQmlItem)
        return nullptr;
 
    const QList<QQuickItem *> children = m_tabBarQmlItem->childItems();
    for (QQuickItem *child : children) {
        if (qstrcmp(child->metaObject()->className(), "QQuickListView") == 0)
            return child;
    }
 
    return nullptr;
}
 
void TabBarQuick::moveTabTo(int from, int to)
{
    Q_UNUSED(from);
    Q_UNUSED(to);
    // Not implemented yet
}