Move QQuickPopupPositioner out of qquickpopup.*

qquickpopup.cpp has grown massive.

Change-Id: Ibbc83331b642d854d4f7dc2aebe8b3fc46ec7bee
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

1 files changed, 148 insertions, 0 deletions

diff --git a/src/quicktemplates2/qquickpopuppositioner.cpp b/src/quicktemplates2/qquickpopuppositioner.cpp
new file mode 100644
index 00000000..f9d12865
--- /dev/null
+++ b/src/quicktemplates2/qquickpopuppositioner.cpp
@@ -0,0 +1,148 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Templates 2 module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://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.LGPLv3 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.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 later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickpopuppositioner_p_p.h"
+#include "qquickpopup_p_p.h"
+
+#include <QtQuick/private/qquickitem_p.h>
+
+QT_BEGIN_NAMESPACE
+
+static const QQuickItemPrivate::ChangeTypes AncestorChangeTypes = QQuickItemPrivate::Geometry
+                                                                  | QQuickItemPrivate::Parent
+                                                                  | QQuickItemPrivate::Children;
+
+static const QQuickItemPrivate::ChangeTypes ItemChangeTypes = QQuickItemPrivate::Geometry
+                                                             | QQuickItemPrivate::Parent;
+
+QQuickPopupPositioner::QQuickPopupPositioner(QQuickPopupPrivate *popup) :
+    m_parentItem(nullptr),
+    m_popup(popup)
+{
+}
+
+QQuickPopupPositioner::~QQuickPopupPositioner()
+{
+    if (m_parentItem) {
+        QQuickItemPrivate::get(m_parentItem)->removeItemChangeListener(this, ItemChangeTypes);
+        removeAncestorListeners(m_parentItem->parentItem());
+    }
+}
+
+QQuickItem *QQuickPopupPositioner::parentItem() const
+{
+    return m_parentItem;
+}
+
+void QQuickPopupPositioner::setParentItem(QQuickItem *parent)
+{
+    if (m_parentItem == parent)
+        return;
+
+    if (m_parentItem) {
+        QQuickItemPrivate::get(m_parentItem)->removeItemChangeListener(this, ItemChangeTypes);
+        removeAncestorListeners(m_parentItem->parentItem());
+    }
+
+    m_parentItem = parent;
+
+    if (!parent)
+        return;
+
+    QQuickItemPrivate::get(parent)->addItemChangeListener(this, ItemChangeTypes);
+    addAncestorListeners(parent->parentItem());
+
+    if (m_popup->popupItem->isVisible())
+        m_popup->reposition();
+}
+
+void QQuickPopupPositioner::itemGeometryChanged(QQuickItem *, QQuickGeometryChange, const QRectF &)
+{
+    if (m_parentItem && m_popup->popupItem->isVisible())
+        m_popup->reposition();
+}
+
+void QQuickPopupPositioner::itemParentChanged(QQuickItem *, QQuickItem *parent)
+{
+    addAncestorListeners(parent);
+}
+
+void QQuickPopupPositioner::itemChildRemoved(QQuickItem *item, QQuickItem *child)
+{
+    if (isAncestor(child))
+        removeAncestorListeners(item);
+}
+
+void QQuickPopupPositioner::removeAncestorListeners(QQuickItem *item)
+{
+    if (item == m_parentItem)
+        return;
+
+    QQuickItem *p = item;
+    while (p) {
+        QQuickItemPrivate::get(p)->removeItemChangeListener(this, AncestorChangeTypes);
+        p = p->parentItem();
+    }
+}
+
+void QQuickPopupPositioner::addAncestorListeners(QQuickItem *item)
+{
+    if (item == m_parentItem)
+        return;
+
+    QQuickItem *p = item;
+    while (p) {
+        QQuickItemPrivate::get(p)->addItemChangeListener(this, AncestorChangeTypes);
+        p = p->parentItem();
+    }
+}
+
+// TODO: use QQuickItem::isAncestorOf() in dev/5.7
+bool QQuickPopupPositioner::isAncestor(QQuickItem *item) const
+{
+    if (!m_parentItem)
+        return false;
+
+    QQuickItem *parent = m_parentItem;
+    while (parent) {
+        if (parent == item)
+            return true;
+        parent = parent->parentItem();
+    }
+    return false;
+}
+
+QT_END_NAMESPACE