opcuaviewer: Add a command line parameter for the initial url

Use QCommandLineParser to obtain the parameter.

Change-Id: I770610df7046d7f4bd34ebb4d3fa2706e587439c
Reviewed-by: Rainer Keller <Rainer.Keller@qt.io>

4 files changed, 17 insertions, 6 deletions

diff --git a/examples/opcua/opcuaviewer/main.cpp b/examples/opcua/opcuaviewer/main.cpp
index 56df0c7..b7df303 100644
--- a/examples/opcua/opcuaviewer/main.cpp
+++ b/examples/opcua/opcuaviewer/main.cpp
@@ -50,11 +50,24 @@
 
 #include "mainwindow.h"
 #include <QApplication>
+#include <QCommandLineParser>
+#include <QCommandLineOption>
 
 int main(int argc, char **argv)
 {
     QApplication app(argc, argv);
-    MainWindow mainWindow;
+    QCoreApplication::setApplicationVersion(QLatin1String(QT_VERSION_STR));
+    QCoreApplication::setApplicationName(QLatin1String("Qt OpcUa Viewer"));
+
+    QCommandLineParser parser;
+    parser.addHelpOption();
+    parser.addVersionOption();
+    parser.addPositionalArgument(QLatin1String("url"), QLatin1String("The url to open."));
+    parser.process(app);
+
+    const auto positionalArguments = parser.positionalArguments();
+    const auto initialUrl = positionalArguments.value(0, QLatin1String("opc.tcp://localhost:48010"));
+    MainWindow mainWindow(initialUrl.trimmed());
     mainWindow.show();
     return QCoreApplication::exec();
 }
diff --git a/examples/opcua/opcuaviewer/mainwindow.cpp b/examples/opcua/opcuaviewer/mainwindow.cpp
index 137ffa8..3b47a27 100644
--- a/examples/opcua/opcuaviewer/mainwindow.cpp
+++ b/examples/opcua/opcuaviewer/mainwindow.cpp
@@ -112,12 +112,13 @@ static void messageHandler(QtMsgType type, const QMessageLogContext &context, co
        oldMessageHandler(type, context, msg);
 }
 
-MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
+MainWindow::MainWindow(const QString &initialUrl, QWidget *parent) : QMainWindow(parent)
   , ui(new Ui::MainWindow)
   , mOpcUaModel(new OpcUaModel(this))
   , mOpcUaProvider(new QOpcUaProvider(this))
 {
     ui->setupUi(this);
+    ui->host->setText(initialUrl);
     mainWindowGlobal = this;
 
     connect(ui->quitAction, &QAction::triggered, this, &QWidget::close);
diff --git a/examples/opcua/opcuaviewer/mainwindow.h b/examples/opcua/opcuaviewer/mainwindow.h
index 2f3d23d..346a555 100644
--- a/examples/opcua/opcuaviewer/mainwindow.h
+++ b/examples/opcua/opcuaviewer/mainwindow.h
@@ -67,7 +67,7 @@ class MainWindow : public QMainWindow
 {
     Q_OBJECT
 public:
-    explicit MainWindow(QWidget *parent = nullptr);
+    explicit MainWindow(const QString &initialUrl, QWidget *parent = nullptr);
     ~MainWindow();
     Q_INVOKABLE void log(const QString &text, const QString &context, const QColor &color);
     void log(const QString &text, const QColor &color = Qt::black);
diff --git a/examples/opcua/opcuaviewer/mainwindow.ui b/examples/opcua/opcuaviewer/mainwindow.ui
index 429a4e4..e5be46a 100644
--- a/examples/opcua/opcuaviewer/mainwindow.ui
+++ b/examples/opcua/opcuaviewer/mainwindow.ui
@@ -68,9 +68,6 @@
         </item>
         <item row="1" column="1">
          <widget class="QLineEdit" name="host">
-          <property name="text">
-           <string>opc.tcp://localhost:48010</string>
-          </property>
           <property name="clearButtonEnabled">
            <bool>true</bool>
           </property>