Introduce threaded fetchmore example

Added an example of combining QThread and QAbstractItemModel - a feat
that our customers ask every now and then

Task-number: QTBUG-135351
Pick-to: 6.8 6.9
Change-Id: I476e7121361e4d85c2d87eb663f0389a337a3085
Reviewed-by: Fabian Kosmale <[email protected]>

1 files changed, 44 insertions, 0 deletions

diff --git a/examples/quick/models/threadedfetchmore/ContactBookDelegate.qml b/examples/quick/models/threadedfetchmore/ContactBookDelegate.qml
new file mode 100644
index 0000000000..b93cb4aa9c
--- /dev/null
+++ b/examples/quick/models/threadedfetchmore/ContactBookDelegate.qml
@@ -0,0 +1,44 @@
+// Copyright (C) 2025 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+import QtQuick
+import QtQuick.Controls
+import QtQuick.Layouts
+
+Rectangle {
+    color: "white"
+    border.width: model.isLoadingElement ? 0 : 1
+    border.color: "black"
+    implicitHeight: 50
+    RowLayout {
+        anchors.fill: parent
+        spacing: 5
+        BusyIndicator {
+            Layout.alignment: Qt.AlignHCenter
+            implicitHeight: 30
+            implicitWidth: implicitHeight
+            visible: model.isLoadingElement
+        }
+        Label {
+            font.pixelSize: 30
+            font.bold: true
+            text: model.number
+            visible: !model.isLoadingElement
+        }
+        ColumnLayout {
+            implicitHeight: 40
+            Layout.fillWidth: true
+            Layout.fillHeight: true
+            Layout.margins: 3
+            visible: !model.isLoadingElement
+            Label {
+                font.pixelSize: 16
+                text: model.title
+            }
+            Label {
+                font.pixelSize: 14
+                text: model.subtitle
+            }
+        }
+    }
+}