QuickPublication Example: fix qmllint warnings

Fix the qmllint warnings in the quickpublication example.

Pick-to: 6.6 6.5
Task-number: QTBUG-110893
Change-Id: If78a908807ee8a5f6f693d159a05a9ee91b1e38d
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

2 files changed, 9 insertions, 5 deletions

diff --git a/examples/mqtt/quickpublication/Main.qml b/examples/mqtt/quickpublication/Main.qml
index 0c5cb00..65ae93b 100644
--- a/examples/mqtt/quickpublication/Main.qml
+++ b/examples/mqtt/quickpublication/Main.qml
@@ -130,7 +130,7 @@ Window {
                         return
                     }
                     client.publish(pubField.text, msgField.text, qosItems.currentText, retain.checked)
-                    addMessage(msgField.text)
+                    root.addMessage(msgField.text)
                 }
             }
         }
@@ -138,19 +138,22 @@ Window {
         ListView {
             id: messageView
             model: messageModel
-            height: 300
-            width: 200
+            implicitHeight: 300
+            implicitWidth: 200
             Layout.fillHeight: true
             Layout.fillWidth: true
             Layout.columnSpan: 2
             clip: true
             delegate: Rectangle {
-                width: messageView.width
+                id: delegatedRectangle
+                required property int index
+                required property string payload
+                width: ListView.view.width
                 height: 30
                 color: index % 2 ? "#DDDDDD" : "#888888"
                 radius: 5
                 Text {
-                    text: payload
+                    text: delegatedRectangle.payload
                     anchors.centerIn: parent
                 }
             }
diff --git a/examples/mqtt/quickpublication/qmlmqttclient.h b/examples/mqtt/quickpublication/qmlmqttclient.h
index bb91761..aac08cd 100644
--- a/examples/mqtt/quickpublication/qmlmqttclient.h
+++ b/examples/mqtt/quickpublication/qmlmqttclient.h
@@ -16,6 +16,7 @@ class QmlMqttClient : public QObject
     Q_PROPERTY(int port READ port WRITE setPort NOTIFY portChanged)
     Q_PROPERTY(QMqttClient::ClientState state READ state WRITE setState NOTIFY stateChanged)
     QML_NAMED_ELEMENT(MqttClient)
+    QML_EXTENDED_NAMESPACE(QMqttClient)
 public:
 
     QmlMqttClient(QObject *parent = nullptr);