StackView: fix initialization of items

Only items that were created from pushed components were initialized.
This change fixes item initialization for StackView::initialItem and
pushed items.

Change-Id: I6fe1afa233e63320180dfe8eac3874fed69cbb3b
Task-number: QTBUG-47318
Reviewed-by: Mitch Curtis <mitch.curtis@theqtcompany.com>

3 files changed, 27 insertions, 27 deletions

diff --git a/src/controls/qquickstackview_p.cpp b/src/controls/qquickstackview_p.cpp
index c0969199..67cdde59 100644
--- a/src/controls/qquickstackview_p.cpp
+++ b/src/controls/qquickstackview_p.cpp
@@ -58,14 +58,14 @@ public:
     QQuickStackIncubator(QQuickStackElement *element) : QQmlIncubator(Synchronous), element(element) { }
 
 protected:
-    void setInitialState(QObject *object) Q_DECL_OVERRIDE { element->initItem(object); }
+    void setInitialState(QObject *object) Q_DECL_OVERRIDE { element->incubate(object); }
 
 private:
     QQuickStackElement *element;
 };
 
 QQuickStackElement::QQuickStackElement() : QQuickItemViewTransitionableItem(Q_NULLPTR),
-    index(-1), removal(false), ownItem(false), ownComponent(false),
+    index(-1), init(false), removal(false), ownItem(false), ownComponent(false),
     context(Q_NULLPTR), component(Q_NULLPTR), incubator(Q_NULLPTR), view(Q_NULLPTR),
     status(QQuickStackView::Inactive)
 {
@@ -114,11 +114,8 @@ QQuickStackElement *QQuickStackElement::fromObject(QObject *object, QQuickStackV
         element->ownComponent = true;
     }
     element->item = qobject_cast<QQuickItem *>(object);
-    if (element->item) {
+    if (element->item)
         element->originalParent = element->item->parentItem();
-        element->item->setParentItem(view);
-        QQuickItemPrivate::get(element->item)->addItemChangeListener(element, QQuickItemPrivate::Destroyed);
-    }
     return element;
 }
 
@@ -138,32 +135,34 @@ bool QQuickStackElement::load(QQuickStackView *parent)
         incubator = new QQuickStackIncubator(this);
         component->create(*incubator, context);
     }
-    initProperties();
+    initialize();
     return item;
 }
 
-void QQuickStackElement::initItem(QObject *object)
+void QQuickStackElement::incubate(QObject *object)
 {
     item = qmlobject_cast<QQuickItem *>(object);
-    if (item) {
+    if (item)
         QQmlEngine::setObjectOwnership(item, QQmlEngine::CppOwnership);
-        QQuickItemPrivate *p = QQuickItemPrivate::get(item);
-        if (!p->widthValid) {
-            item->setWidth(view->width());
-            p->widthValid = true;
-        }
-        if (!p->heightValid) {
-            item->setHeight(view->height());
-            p->heightValid = true;
-        }
-        item->setParentItem(view);
-        p->addItemChangeListener(this, QQuickItemPrivate::Destroyed);
-    }
-    initProperties();
 }
 
-void QQuickStackElement::initProperties()
+void QQuickStackElement::initialize()
 {
+    if (!item || init)
+        return;
+
+    QQuickItemPrivate *p = QQuickItemPrivate::get(item);
+    if (!p->widthValid) {
+        item->setWidth(view->width());
+        p->widthValid = false;
+    }
+    if (!p->heightValid) {
+        item->setHeight(view->height());
+        p->heightValid = false;
+    }
+    item->setParentItem(view);
+    p->addItemChangeListener(this, QQuickItemPrivate::Destroyed);
+
     if (!properties.isUndefined()) {
         QQmlComponentPrivate *d = QQmlComponentPrivate::get(component);
         Q_ASSERT(d && d->engine);
@@ -174,6 +173,8 @@ void QQuickStackElement::initProperties()
         d->initializeObjectWithInitialProperties(ipv, item);
         properties.clear();
     }
+
+    init = true;
 }
 
 void QQuickStackElement::setIndex(int value)
diff --git a/src/controls/qquickstackview_p_p.h b/src/controls/qquickstackview_p_p.h
index 063ce17e..84ed9f35 100644
--- a/src/controls/qquickstackview_p_p.h
+++ b/src/controls/qquickstackview_p_p.h
@@ -71,8 +71,8 @@ public:
     static QQuickStackElement *fromObject(QObject *object, QQuickStackView *view);
 
     bool load(QQuickStackView *parent);
-    void initItem(QObject *object);
-    void initProperties();
+    void incubate(QObject *object);
+    void initialize();
 
     void setIndex(int index);
     void setView(QQuickStackView *view);
@@ -85,6 +85,7 @@ public:
     void itemDestroyed(QQuickItem *item) Q_DECL_OVERRIDE;
 
     int index;
+    bool init;
     bool removal;
     bool ownItem;
     bool ownComponent;
diff --git a/tests/auto/applicationwindow/tst_applicationwindow.cpp b/tests/auto/applicationwindow/tst_applicationwindow.cpp
index 4d53c8cf..bdb55ce7 100644
--- a/tests/auto/applicationwindow/tst_applicationwindow.cpp
+++ b/tests/auto/applicationwindow/tst_applicationwindow.cpp
@@ -247,9 +247,7 @@ void tst_applicationwindow::implicitFill()
     QVERIFY(nextItem);
 
     QVERIFY(QMetaObject::invokeMethod(window, "pushNextItem"));
-    QEXPECT_FAIL("", "QTBUG-47318", Continue);
     QCOMPARE(nextItem->width(), 400.0);
-    QEXPECT_FAIL("", "QTBUG-47318", Continue);
     QCOMPARE(nextItem->height(), 400.0);
 }