File indexing completed on 2024-04-21 03:56:01

 /*
  *  SPDX-FileCopyrightText: 2017 Marco Martin <mart@kde.org>
  *  SPDX-FileCopyrightText: 2023 ivan tkachenko <me@ratijas.tk>
  *
  *  SPDX-License-Identifier: LGPL-2.0-or-later
  */
 
 #include "scenepositionattached.h"
 #include <QDebug>
 #include <QQuickItem>
 
 ScenePositionAttached::ScenePositionAttached(QObject *parent)
     : QObject(parent)
 {
     m_item = qobject_cast<QQuickItem *>(parent);
     connectAncestors(m_item);
 }
 
 ScenePositionAttached::~ScenePositionAttached()
 {
 }
 
 qreal ScenePositionAttached::x() const
 {
     qreal x = 0.0;
     QQuickItem *item = m_item;
 
     while (item) {
         x += item->x();
         item = item->parentItem();
     }
 
     return x;
 }
 
 qreal ScenePositionAttached::y() const
 {
     qreal y = 0.0;
     QQuickItem *item = m_item;
 
     while (item) {
         y += item->y();
         item = item->parentItem();
     }
 
     return y;
 }
 
 void ScenePositionAttached::connectAncestors(QQuickItem *item)
 {
     if (!item) {
         return;
     }
 
     QQuickItem *ancestor = item;
     while (ancestor) {
         m_ancestors << ancestor;
 
         connect(ancestor, &QQuickItem::xChanged, this, &ScenePositionAttached::xChanged);
         connect(ancestor, &QQuickItem::yChanged, this, &ScenePositionAttached::yChanged);
         connect(ancestor, &QQuickItem::parentChanged, this, [this, ancestor]() {
             while (!m_ancestors.isEmpty()) {
                 QQuickItem *last = m_ancestors.takeLast();
                 // Disconnect the item which had its parent changed too,
                 // because connectAncestors() would reconnect it next.
                 disconnect(last, nullptr, this, nullptr);
                 if (last == ancestor) {
                     break;
                 }
             }
 
             connectAncestors(ancestor);
 
             Q_EMIT xChanged();
             Q_EMIT yChanged();
         });
 
         ancestor = ancestor->parentItem();
     }
 }
 
 ScenePositionAttached *ScenePositionAttached::qmlAttachedProperties(QObject *object)
 {
     return new ScenePositionAttached(object);
 }
 
 #include "moc_scenepositionattached.cpp"