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diff --git a/src/plugins/qmltooling/qmldbg_inspector/qquickwindowinspector.cpp b/src/plugins/qmltooling/qmldbg_inspector/qquickwindowinspector.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickwindowinspector.h"
+#include "inspecttool.h"
+
+#include <private/qquickitem_p.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace QmlJSDebugger {
+
+/*
+ * Returns the first visible item at the given position, or 0 when no such
+ * child exists.
+ */
+static QQuickItem *itemAt(QQuickItem *item, const QPointF &pos,
+ QQuickItem *overlay)
+{
+ if (item == overlay)
+ return 0;
+
+ if (!item->isVisible() || item->opacity() == 0.0)
+ return 0;
+
+ if (item->flags() & QQuickItem::ItemClipsChildrenToShape) {
+ if (!QRectF(0, 0, item->width(), item->height()).contains(pos))
+ return 0;
+ }
+
+ QList<QQuickItem *> children = QQuickItemPrivate::get(item)->paintOrderChildItems();
+ for (int i = children.count() - 1; i >= 0; --i) {
+ QQuickItem *child = children.at(i);
+ if (QQuickItem *betterCandidate = itemAt(child, item->mapToItem(child, pos),
+ overlay))
+ return betterCandidate;
+ }
+
+ if (!(item->flags() & QQuickItem::ItemHasContents))
+ return 0;
+
+ if (!QRectF(0, 0, item->width(), item->height()).contains(pos))
+ return 0;
+
+ return item;
+}
+
+/*
+ * Collects all the items at the given position, from top to bottom.
+ */
+static void collectItemsAt(QQuickItem *item, const QPointF &pos,
+ QQuickItem *overlay, QList<QQuickItem *> &resultList)
+{
+ if (item == overlay)
+ return;
+
+ if (item->flags() & QQuickItem::ItemClipsChildrenToShape) {
+ if (!QRectF(0, 0, item->width(), item->height()).contains(pos))
+ return;
+ }
+
+ QList<QQuickItem *> children = QQuickItemPrivate::get(item)->paintOrderChildItems();
+ for (int i = children.count() - 1; i >= 0; --i) {
+ QQuickItem *child = children.at(i);
+ collectItemsAt(child, item->mapToItem(child, pos), overlay, resultList);
+ }
+
+ if (!QRectF(0, 0, item->width(), item->height()).contains(pos))
+ return;
+
+ resultList.append(item);
+}
+
+QQuickWindowInspector::QQuickWindowInspector(QQuickWindow *quickWindow, QObject *parent) :
+ QObject(parent),
+ m_overlay(new QQuickItem),
+ m_window(quickWindow),
+ m_parentWindow(0),
+ m_tool(0)
+{
+ setParentWindow(quickWindow);
+
+ // Try to make sure the overlay is always on top
+ m_overlay->setZ(FLT_MAX);
+
+ if (QQuickItem *root = m_window->contentItem())
+ m_overlay->setParentItem(root);
+
+ m_window->installEventFilter(this);
+}
+
+bool QQuickWindowInspector::eventFilter(QObject *obj, QEvent *event)
+{
+ if (!m_tool || obj != m_window)
+ return QObject::eventFilter(obj, event);
+
+ switch (event->type()) {
+ case QEvent::Enter:
+ m_tool->enterEvent(event);
+ return true;
+ case QEvent::Leave:
+ m_tool->leaveEvent(event);
+ return true;
+ case QEvent::MouseButtonPress:
+ m_tool->mousePressEvent(static_cast<QMouseEvent*>(event));
+ return true;
+ case QEvent::MouseMove:
+ m_tool->mouseMoveEvent(static_cast<QMouseEvent*>(event));
+ return true;
+ case QEvent::MouseButtonRelease:
+ return true;
+ case QEvent::KeyPress:
+ m_tool->keyPressEvent(static_cast<QKeyEvent*>(event));
+ return true;
+ case QEvent::KeyRelease:
+ return true;
+ case QEvent::MouseButtonDblClick:
+ m_tool->mouseDoubleClickEvent(static_cast<QMouseEvent*>(event));
+ return true;
+#ifndef QT_NO_WHEELEVENT
+ case QEvent::Wheel:
+ return true;
+#endif
+ case QEvent::TouchBegin:
+ case QEvent::TouchUpdate:
+ case QEvent::TouchEnd:
+ m_tool->touchEvent(static_cast<QTouchEvent*>(event));
+ return true;
+ default:
+ break;
+ }
+
+ return QObject::eventFilter(obj, event);
+}
+
+void QQuickWindowInspector::setShowAppOnTop(bool appOnTop)
+{
+ if (!m_parentWindow)
+ return;
+
+ Qt::WindowFlags flags = m_parentWindow->flags();
+ Qt::WindowFlags newFlags = appOnTop ? (flags | Qt::WindowStaysOnTopHint) :
+ (flags & ~Qt::WindowStaysOnTopHint);
+ if (newFlags != flags)
+ m_parentWindow->setFlags(newFlags);
+}
+
+bool QQuickWindowInspector::isEnabled() const
+{
+ return m_tool != 0;
+}
+
+void QQuickWindowInspector::setEnabled(bool enabled)
+{
+ if (enabled) {
+ m_tool = new InspectTool(this, m_window);
+ } else {
+ delete m_tool;
+ m_tool = 0;
+ }
+}
+
+QQuickWindow *QQuickWindowInspector::quickWindow() const
+{
+ return m_window;
+}
+
+void QQuickWindowInspector::setParentWindow(QWindow *parentWindow)
+{
+ if (parentWindow) {
+ while (QWindow *w = parentWindow->parent())
+ parentWindow = w;
+ }
+
+ m_parentWindow = parentWindow;
+}
+
+QList<QQuickItem *> QQuickWindowInspector::itemsAt(const QPointF &pos) const
+{
+ QList<QQuickItem *> resultList;
+ QQuickItem *root = m_window->contentItem();
+ collectItemsAt(root, root->mapFromScene(pos), m_overlay,
+ resultList);
+ return resultList;
+}
+
+QQuickItem *QQuickWindowInspector::topVisibleItemAt(const QPointF &pos) const
+{
+ QQuickItem *root = m_window->contentItem();
+ return itemAt(root, root->mapFromScene(pos), m_overlay);
+}
+
+
+} // namespace QmlJSDebugger
+
+QT_END_NAMESPACE
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