Fix initial currentIndex in Tumbler when wrap is set to false

syncCurrentIndex () function assumes that PathView is used as view for,
Tumbler component, and states that actualViewIndex should be 0 while
initialization. This statement is not correct when Tumbler is in
non-wrap mode and uses ListView as view, where currentIndex is set to
-1 by default. Fix actualViewIndex condition according to ListView
logic.

Fixes: QTBUG-84426
Change-Id: I4ef1e7b45399bf748968490f44b8909f3218d9bc
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
(cherry picked from commit 1fe83c1fd3eb9abfd13a7b8c7adb2c2355d8ad4d)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/auto/controls/data/tst_tumbler.qml b/tests/auto/controls/data/tst_tumbler.qml
index c103aefc..3a09bd9f 100644
--- a/tests/auto/controls/data/tst_tumbler.qml
+++ b/tests/auto/controls/data/tst_tumbler.qml
@@ -1257,4 +1257,25 @@ TestCase {
         tumbler.height *= 1.4
         tryCompare(delegate, "displacement", 0)
     }
+
+    //QTBUG-84426
+    Component {
+        id: initialCurrentIndexTumbler
+
+        Tumbler {
+            anchors.centerIn: parent
+            width: 60
+            height: 200
+            delegate: Text {text: modelData}
+            model: 10
+            currentIndex: 4
+        }
+    }
+
+    function test_initialCurrentIndex() {
+        var tumbler = createTemporaryObject(initialCurrentIndexTumbler, testCase, {wrap: true});
+        compare(tumbler.currentIndex, 4);
+        tumbler = createTemporaryObject(initialCurrentIndexTumbler, testCase, {wrap: false});
+        compare(tumbler.currentIndex, 4);
+    }
 }