Tumbler: reduce amount of signal-slot connections and change listeners

Instead of adding change listeners and signal-slot connections for each
attached object, add them once in QQuickTumbler and then notify each
attached object all in one go.

Change-Id: I6c5e76182c026b24922dcddaeb08ae4b1d4c4c38
Reviewed-by: J-P Nurmi <jpnurmi@qt.io>

1 files changed, 1 insertions, 6 deletions

diff --git a/src/quicktemplates2/qquicktumbler_p_p.h b/src/quicktemplates2/qquicktumbler_p_p.h
index 38b0f60d..fc38dfcc 100644
--- a/src/quicktemplates2/qquicktumbler_p_p.h
+++ b/src/quicktemplates2/qquicktumbler_p_p.h
@@ -95,6 +95,7 @@ public:
     void _q_updateItemWidths();
     void _q_onViewCurrentIndexChanged();
     void _q_onViewCountChanged();
+    void _q_calculateAttachedDisplacements();
 
     void disconnectFromView();
     void setupViewData(QQuickItem *newControlContentItem);
@@ -119,15 +120,9 @@ public:
 
     void init(QQuickItem *delegateItem);
 
-    void itemGeometryChanged(QQuickItem *item, QQuickGeometryChange change, const QRectF &diff) override;
-    void itemChildAdded(QQuickItem *, QQuickItem *) override;
-    void itemChildRemoved(QQuickItem *, QQuickItem *) override;
-
     void _q_calculateDisplacement();
     void emitIfDisplacementChanged(qreal oldDisplacement, qreal newDisplacement);
 
-    void viewDataSetUp();
-
     static QQuickTumblerAttachedPrivate *get(QQuickTumblerAttached *attached);
 
     // The Tumbler that contains the delegate. Required to calculated the displacement.