1 files changed, 11 insertions, 4 deletions
diff --git a/src/quicklayouts/qquickstacklayout.cpp b/src/quicklayouts/qquickstacklayout.cpp
index 5b2b0dcbcd..c81b0b5acc 100644
--- a/src/quicklayouts/qquickstacklayout.cpp
+++ b/src/quicklayouts/qquickstacklayout.cpp
@@ -190,10 +190,8 @@ QSizeF QQuickStackLayout::sizeHint(Qt::SizeHint whichSizeHint) const
         maxS = QSizeF(std::numeric_limits<qreal>::infinity(), std::numeric_limits<qreal>::infinity());
 
         const int count = itemCount();
-        m_cachedItemSizeHints.resize(count);
         for (int i = 0; i < count; ++i) {
-            SizeHints &hints = m_cachedItemSizeHints[i];
-            QQuickStackLayout::collectItemSizeHints(itemAt(i), hints.array);
+            SizeHints &hints = cachedItemSizeHints(i);
             minS = minS.expandedTo(hints.min());
             prefS = prefS.expandedTo(hints.pref());
             //maxS = maxS.boundedTo(hints.max());       // Can be resized to be larger than any of its items.
@@ -287,6 +285,7 @@ void QQuickStackLayout::childItemsChanged()
     if (count != d->count) {
         d->count = count;
         emit countChanged();
+        m_cachedItemSizeHints.resize(count);
     }
     for (int i = 0; i < count; ++i) {
         QQuickItem *child = itemAt(i);
@@ -302,6 +301,14 @@ void QQuickStackLayout::childItemsChanged()
     }
 }
 
+QQuickStackLayout::SizeHints &QQuickStackLayout::cachedItemSizeHints(int index) const {
+    SizeHints &hints = m_cachedItemSizeHints[index];
+    if (!hints.min().isValid())
+        QQuickStackLayout::collectItemSizeHints(itemAt(index), hints.array);
+    return hints;
+}
+
+
 void QQuickStackLayout::rearrange(const QSizeF &newSize)
 {
     Q_D(QQuickStackLayout);
@@ -312,7 +319,7 @@ void QQuickStackLayout::rearrange(const QSizeF &newSize)
 
     if (d->currentIndex == -1 || d->currentIndex >= m_cachedItemSizeHints.count())
         return;
-    QQuickStackLayout::SizeHints &hints = m_cachedItemSizeHints[d->currentIndex];
+    QQuickStackLayout::SizeHints &hints = cachedItemSizeHints(d->currentIndex);
     QQuickItem *item = itemAt(d->currentIndex);
     Q_ASSERT(item);
     item->setPosition(QPointF(0,0));    // ### respect alignment?