Add a very basic menu system at the moment.

Add a menu programatically as I intend to make it auto populate from p[lugins later.
Add some simple icons to although this is subject to change later.

src/mainwindow.cpp

@@ -6,9 +6,44 @@ MainWindow::MainWindow(QWidget *parent)
     , ui(new Ui::MainWindow)
 {
     ui->setupUi(this);
+    createActions();
+    createMenus();
+    this->setWindowIcon(QIcon::fromTheme(QIcon::ThemeIcon::Computer));
 }
 
 MainWindow::~MainWindow()
 {
     delete ui;
 }
+
+void MainWindow::createActions()
+{
+    exitAct = new QAction(QIcon::fromTheme(QIcon::ThemeIcon::ApplicationExit),
+                          tr("E&xit"), this);
+    exitAct->setShortcuts(QKeySequence::Quit);
+    connect(exitAct, &QAction::triggered, this, &QWidget::close);
+
+    aboutAct = new QAction(QIcon::fromTheme(QIcon::ThemeIcon::HelpAbout),
+                           tr("&About"), this);
+    connect(aboutAct, &QAction::triggered, this, &MainWindow::about);
+
+    aboutQtAct = new QAction(QIcon::fromTheme(QIcon::ThemeIcon::HelpAbout),
+                          tr("About &Qt"), this);
+    connect(aboutQtAct, &QAction::triggered, qApp, &QApplication::aboutQt);
+}
+
+void MainWindow::createMenus()
+{
+    fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(exitAct);
+
+    helpMenu = menuBar()->addMenu(tr("&Help"));
+    helpMenu->addAction(aboutAct);
+    helpMenu->addAction(aboutQtAct);
+}
+
+void MainWindow::about()
+{
+    QMessageBox::about(this, tr("About SOM"),
+                       tr("<b>SOM</b> is a tool to manage and organise Sparkleverse OS building."));
+}

src/mainwindow.h

@@ -2,11 +2,15 @@
 #define MAINWINDOW_H
 
 #include <QMainWindow>
+#include <QtWidgets>
 
 QT_BEGIN_NAMESPACE
 namespace Ui {
 class MainWindow;
 }
+class QAction;
+class QLabel;
+class QMenu;
 QT_END_NAMESPACE
 
 class MainWindow : public QMainWindow
@@ -19,5 +23,17 @@ public:
 
 private:
     Ui::MainWindow *ui;
+    void createActions();
+    void createMenus();
+    QMenu *fileMenu;
+    QMenu *editMenu;
+    QMenu *helpMenu;
+    QAction *exitAct;
+    QAction *aboutAct;
+    QAction *aboutQtAct;
+
+private slots:
+    void about();
+
 };
 #endif // MAINWINDOW_H