From 8e53b4913946801f5ba51807feda21778f264bf0 Mon Sep 17 00:00:00 2001
From: Paolo Angelelli <paolo.angelelli.qt@gmail.com>
Date: Thu, 26 Dec 2019 21:24:29 +0100
Subject: Add parent property to QParametrizableObject

Also emitting signals when the parent is changed internally
(e.g., in a MapObjectView).
Not revisioning it since it is used both in QtLocation
and in Qt.labs.location, and setting it to 15 would break
the property in map objects.

Change-Id: Ib11b18b7fcc507b5a11481f84f2bf0bd8c9f558e
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>
---
 .../declarativemaps/qparameterizableobject.cpp     | 41 +++++++++++++++++++---
 .../declarativemaps/qparameterizableobject_p.h     |  4 +++
 2 files changed, 41 insertions(+), 4 deletions(-)

diff --git a/src/location/declarativemaps/qparameterizableobject.cpp b/src/location/declarativemaps/qparameterizableobject.cpp
index 0e138b86..26d9a11e 100644
--- a/src/location/declarativemaps/qparameterizableobject.cpp
+++ b/src/location/declarativemaps/qparameterizableobject.cpp
@@ -37,13 +37,10 @@
 #include "qparameterizableobject_p.h"
 #include "qdeclarativegeomapparameter_p.h"
 #include <QtLocation/private/qgeomapparameter_p.h>
+#include <private/qobject_p.h>
 
 QT_BEGIN_NAMESPACE
 
-QParameterizableObject::QParameterizableObject(QObject *parent)
-    : QObject(parent)
-{}
-
 void QParameterizableObject::appendChild(QObject *v)
 {
     m_children.append(v);
@@ -85,4 +82,40 @@ void QParameterizableObject::clear(QQmlListProperty<QObject> *p)
     object->clearChildren();
 }
 
+class QParameterizableObjectData: public QAbstractDeclarativeData
+{
+public:
+    QParameterizableObjectData()
+    {
+        init();
+    }
+
+    static inline void init() {
+        static bool initialized = false;
+        if (!initialized) {
+            initialized = true;
+            QAbstractDeclarativeData::parentChanged = parentChanged;
+        }
+    }
+
+    static void parentChanged(QAbstractDeclarativeData *d, QObject *o, QObject *p);
+};
+
+Q_GLOBAL_STATIC(QParameterizableObjectData, parametrizableObjectData)
+
+QParameterizableObject::QParameterizableObject(QObject *parent)
+    : QObject(parent)
+{
+    QObjectPrivate::get(this)->declarativeData = parametrizableObjectData;
+}
+
+void QParameterizableObjectData::parentChanged(QAbstractDeclarativeData *d, QObject *o, QObject *p)
+{
+    Q_UNUSED(p)
+    Q_UNUSED(d)
+    QParameterizableObject *po = qobject_cast<QParameterizableObject *>(o);
+    if (po)
+        po->parentChanged();
+}
+
 QT_END_NAMESPACE
diff --git a/src/location/declarativemaps/qparameterizableobject_p.h b/src/location/declarativemaps/qparameterizableobject_p.h
index e450c6ec..cf393aee 100644
--- a/src/location/declarativemaps/qparameterizableobject_p.h
+++ b/src/location/declarativemaps/qparameterizableobject_p.h
@@ -58,6 +58,7 @@ class QGeoMapParameter;
 class Q_LOCATION_PRIVATE_EXPORT QParameterizableObject : public QObject
 {
     Q_OBJECT
+    Q_PROPERTY(QObject *parent READ parent NOTIFY parentChanged DESIGNABLE false FINAL)
     Q_PROPERTY(QQmlListProperty<QObject> quickChildren READ declarativeChildren DESIGNABLE false)
     Q_CLASSINFO("DefaultProperty", "quickChildren")
 
@@ -76,6 +77,9 @@ public:
         return res;
     }
 
+Q_SIGNALS:
+    void parentChanged();
+
 protected:
     virtual void appendChild(QObject *v);
     virtual void clearChildren();
-- 
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