1 files changed, 35 insertions, 2 deletions
diff --git a/src/quicktemplates2/qquicktumbler_p_p.h b/src/quicktemplates2/qquicktumbler_p_p.h
index 0dcae762..fe8a4ad2 100644
--- a/src/quicktemplates2/qquicktumbler_p_p.h
+++ b/src/quicktemplates2/qquicktumbler_p_p.h
@@ -50,11 +50,10 @@
 
 #include <QtQuick/private/qquickitemchangelistener_p.h>
 #include <QtQuickTemplates2/private/qquickcontrol_p_p.h>
+#include <QtQuickTemplates2/private/qquicktumbler_p.h>
 
 QT_BEGIN_NAMESPACE
 
-class QQuickTumbler;
-
 class Q_QUICKTEMPLATES2_PRIVATE_EXPORT QQuickTumblerPrivate : public QQuickControlPrivate, public QQuickItemChangeListener
 {
     Q_DECLARE_PUBLIC(QQuickTumbler)
@@ -84,6 +83,10 @@ public:
     QQuickItem *view;
     QQuickItem *viewContentItem;
     ContentItemType viewContentItemType;
+    union {
+        qreal viewOffset; // PathView
+        qreal viewContentY; // ListView
+    };
     int currentIndex;
     int pendingCurrentIndex;
     bool ignoreCurrentIndexChanges;
@@ -94,6 +97,10 @@ public:
     void _q_updateItemWidths();
     void _q_onViewCurrentIndexChanged();
     void _q_onViewCountChanged();
+    void _q_onViewOffsetChanged();
+    void _q_onViewContentYChanged();
+
+    void calculateDisplacements();
 
     void disconnectFromView();
     void setupViewData(QQuickItem *newControlContentItem);
@@ -107,6 +114,32 @@ public:
 
     void itemChildAdded(QQuickItem *, QQuickItem *) override;
     void itemChildRemoved(QQuickItem *, QQuickItem *) override;
+    void itemGeometryChanged(QQuickItem *, QQuickGeometryChange , const QRectF &) override;
+};
+
+class QQuickTumblerAttachedPrivate : public QObjectPrivate
+{
+    Q_DECLARE_PUBLIC(QQuickTumblerAttached)
+
+public:
+    QQuickTumblerAttachedPrivate();
+
+    static QQuickTumblerAttachedPrivate *get(QQuickTumblerAttached *attached)
+    {
+        return attached->d_func();
+    }
+
+    void init(QQuickItem *delegateItem);
+
+    void calculateDisplacement();
+    void emitIfDisplacementChanged(qreal oldDisplacement, qreal newDisplacement);
+
+    // The Tumbler that contains the delegate. Required to calculated the displacement.
+    QPointer<QQuickTumbler> tumbler;
+    // The index of the delegate. Used to calculate the displacement.
+    int index;
+    // The displacement for our delegate.
+    qreal displacement;
 };
 
 QT_END_NAMESPACE