opcuaviewer: Wait for the namespaces array

If a server uses the namespace URI for local results in the
browse response, the namespaces array must be available before
the browse results can be used.

Change-Id: I4cd7ca76f9b06089f2b3361ad75eb8077063c60c
Reviewed-by: Frank Meerkoetter <frank.meerkoetter@basyskom.com>

2 files changed, 16 insertions, 2 deletions

diff --git a/examples/opcua/opcuaviewer/mainwindow.cpp b/examples/opcua/opcuaviewer/mainwindow.cpp
index 8c6bf69..c995e1c 100644
--- a/examples/opcua/opcuaviewer/mainwindow.cpp
+++ b/examples/opcua/opcuaviewer/mainwindow.cpp
@@ -324,8 +324,9 @@ void MainWindow::clientConnected()
 {
     mClientConnected = true;
     updateUiState();
-    mOpcUaModel->setOpcUaClient(mOpcUaClient);
-    mTreeView->header()->setSectionResizeMode(1 /* Value column*/, QHeaderView::Interactive);
+
+    connect(mOpcUaClient, &QOpcUaClient::namespaceArrayUpdated, this, &MainWindow::namespacesArrayUpdated);
+    mOpcUaClient->updateNamespaceArray();
 }
 
 void MainWindow::clientDisconnected()
@@ -337,6 +338,18 @@ void MainWindow::clientDisconnected()
     updateUiState();
 }
 
+void MainWindow::namespacesArrayUpdated(const QStringList &namespaceArray)
+{
+    if (namespaceArray.isEmpty()) {
+        qWarning() << "Failed to retrieve the namespaces array";
+        return;
+    }
+
+    disconnect(mOpcUaClient, &QOpcUaClient::namespaceArrayUpdated, this, &MainWindow::namespacesArrayUpdated);
+    mOpcUaModel->setOpcUaClient(mOpcUaClient);
+    mTreeView->header()->setSectionResizeMode(1 /* Value column*/, QHeaderView::Interactive);
+}
+
 void MainWindow::clientError(QOpcUaClient::ClientError error)
 {
     qDebug() << "Client error changed" << error;
diff --git a/examples/opcua/opcuaviewer/mainwindow.h b/examples/opcua/opcuaviewer/mainwindow.h
index 80e7c64..d7056d1 100644
--- a/examples/opcua/opcuaviewer/mainwindow.h
+++ b/examples/opcua/opcuaviewer/mainwindow.h
@@ -80,6 +80,7 @@ private slots:
     void getEndpointsComplete(const QVector<QOpcUa::QEndpointDescription> &endpoints, QOpcUa::UaStatusCode statusCode);
     void clientConnected();
     void clientDisconnected();
+    void namespacesArrayUpdated(const QStringList &namespaceArray);
     void clientError(QOpcUaClient::ClientError);
     void clientState(QOpcUaClient::ClientState);
     void showErrorDialog(QOpcUaErrorState *errorState);