opcuaviewer: Implement connectError callback and add error dialog

Change-Id: I20c34cf47db2f0ea5873616436e045fb6c093448
Reviewed-by: Rainer Keller <Rainer.Keller@qt.io>

2 files changed, 44 insertions, 0 deletions

diff --git a/examples/opcua/opcuaviewer/mainwindow.cpp b/examples/opcua/opcuaviewer/mainwindow.cpp
index 654243f..8c6bf69 100644
--- a/examples/opcua/opcuaviewer/mainwindow.cpp
+++ b/examples/opcua/opcuaviewer/mainwindow.cpp
@@ -67,6 +67,7 @@
 #include <QHeaderView>
 #include <QOpcUaProvider>
 #include <QOpcUaAuthenticationInformation>
+#include <QOpcUaErrorState>
 
 QT_BEGIN_NAMESPACE
 
@@ -214,6 +215,7 @@ void MainWindow::createClient()
             return;
         }
 
+        connect(mOpcUaClient, &QOpcUaClient::connectError, this, &MainWindow::showErrorDialog);
         mOpcUaClient->setIdentity(m_identity);
         mOpcUaClient->setPkiConfiguration(m_pkiConfig);
 
@@ -432,4 +434,45 @@ bool MainWindow::createPkiFolders()
     return result;
 }
 
+void MainWindow::showErrorDialog(QOpcUaErrorState *errorState)
+{
+    QString msg;
+    QMessageBox::StandardButtons buttons     = QMessageBox::Ok;
+    QMessageBox::StandardButton  defaultButton = QMessageBox::Ok;
+
+    const QString statuscode = QOpcUa::statusToString(errorState->errorCode());
+
+    if (errorState->isClientSideError())
+        msg = tr("The client reported: ");
+    else
+        msg = tr("The server reported: ");
+
+    switch (errorState->connectionStep()) {
+    case QOpcUaErrorState::ConnectionStep::CertificateValidation:
+        msg += tr("Server certificate validation failed with error 0x%1 (%2).\nClick 'Abort' to abort the connect, or 'Ignore' to continue connecting.")
+                 .arg(static_cast<ulong>(errorState->errorCode()), 8, 16, QLatin1Char('0')).arg(statuscode);
+        buttons = QMessageBox::Ignore | QMessageBox::Abort;
+        defaultButton = QMessageBox::Abort;
+        break;
+    case QOpcUaErrorState::ConnectionStep::OpenSecureChannel:
+        msg += tr("OpenSecureChannel failed with error 0x%1 (%2).").arg(errorState->errorCode(), 8, 16, QLatin1Char('0')).arg(statuscode);
+        break;
+    case QOpcUaErrorState::ConnectionStep::CreateSession:
+        msg += tr("CreateSession failed with error 0x%1 (%2).").arg(errorState->errorCode(), 8, 16, QLatin1Char('0')).arg(statuscode);
+        break;
+    case QOpcUaErrorState::ConnectionStep::ActivateSession:
+        msg += tr("ActivateSession failed with error 0x%1 (%2).").arg(errorState->errorCode(), 8, 16, QLatin1Char('0')).arg(statuscode);
+        break;
+    }
+
+    QMessageBox::StandardButton result = QMessageBox::warning(
+            this,
+            tr("Connect Error"),
+            msg,
+            buttons,
+            defaultButton);
+
+    errorState->setIgnoreError(result == QMessageBox::Ignore);
+}
+
 QT_END_NAMESPACE
diff --git a/examples/opcua/opcuaviewer/mainwindow.h b/examples/opcua/opcuaviewer/mainwindow.h
index ac776d2..80e7c64 100644
--- a/examples/opcua/opcuaviewer/mainwindow.h
+++ b/examples/opcua/opcuaviewer/mainwindow.h
@@ -82,6 +82,7 @@ private slots:
     void clientDisconnected();
     void clientError(QOpcUaClient::ClientError);
     void clientState(QOpcUaClient::ClientState);
+    void showErrorDialog(QOpcUaErrorState *errorState);
 
 private:
     void createClient();