Add itemAtIndex to quick views

This patch adds itemAtIndex method to ItemView-derived views and
to PathView.

[ChangeLog][QtQuick][QQuickItemView] Added itemAtIndex() to
GridView, ListView and PathView to fetch a visible delegate by index.

Change-Id: Id8475d06c1481036984fe5109bb52cf2729b1c21
Fixes: QTBUG-72961
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

3 files changed, 40 insertions, 0 deletions

diff --git a/tests/auto/quick/qquicklistview/data/listview-itematindex.qml b/tests/auto/quick/qquicklistview/data/listview-itematindex.qml
new file mode 100644
index 0000000000..fba8b11933
--- /dev/null
+++ b/tests/auto/quick/qquicklistview/data/listview-itematindex.qml
@@ -0,0 +1,15 @@
+import QtQuick 2.0
+
+ListView {
+    width: 400
+    height: 400
+    focus: true
+    model: 3
+
+    delegate: Text {
+        width: parent.width
+        height: 10
+        property int idx: index
+        text: index
+    }
+}
diff --git a/tests/auto/quick/qquicklistview/qquicklistview.pro b/tests/auto/quick/qquicklistview/qquicklistview.pro
index b1031e3bb7..fd96c269a2 100644
--- a/tests/auto/quick/qquicklistview/qquicklistview.pro
+++ b/tests/auto/quick/qquicklistview/qquicklistview.pro
@@ -16,6 +16,7 @@ include (../../shared/util.pri)
 include (../shared/util.pri)
 
 TESTDATA = data/*
+DISTFILES += data/*
 
 QT += core-private gui-private qml-private quick-private testlib qmltest
 
diff --git a/tests/auto/quick/qquicklistview/tst_qquicklistview.cpp b/tests/auto/quick/qquicklistview/tst_qquicklistview.cpp
index 03422c5b14..d96590bdae 100644
--- a/tests/auto/quick/qquicklistview/tst_qquicklistview.cpp
+++ b/tests/auto/quick/qquicklistview/tst_qquicklistview.cpp
@@ -166,6 +166,7 @@ private slots:
     void QTBUG_16037();
     void indexAt_itemAt_data();
     void indexAt_itemAt();
+    void itemAtIndex();
     void incrementalModel();
     void onAdd();
     void onAdd_data();
@@ -4782,6 +4783,29 @@ void tst_QQuickListView::indexAt_itemAt()
     delete testObject;
 }
 
+void tst_QQuickListView::itemAtIndex()
+{
+    QScopedPointer<QQuickView> window(createView());
+    window->setSource(testFileUrl("listview-itematindex.qml"));
+    window->show();
+    QVERIFY(QTest::qWaitForWindowExposed(window.data()));
+
+    QQuickListView *listview = qobject_cast<QQuickListView*>(window->rootObject());
+    QVERIFY(listview != nullptr);
+
+    QCOMPARE(listview->itemAtIndex(-1), nullptr);
+    QCOMPARE(listview->itemAtIndex(3), nullptr);
+    QQuickItem *item = listview->itemAtIndex(0);
+    QVERIFY(item);
+    QCOMPARE(item->property("idx"), 0);
+    item = listview->itemAtIndex(1);
+    QVERIFY(item);
+    QCOMPARE(item->property("idx"), 1);
+    item = listview->itemAtIndex(2);
+    QVERIFY(item);
+    QCOMPARE(item->property("idx"), 2);
+}
+
 void tst_QQuickListView::incrementalModel()
 {
     QScopedPointer<QQuickView> window(createView());