Qt 5 and OpenCV 4 Computer Vision Projects

Setting up the full user interface

Let's proceed with the development. In the preceding section, we built a blank window and now we are going to add the menu bar, toolbar, image display component, and the status bar to the window.

First, instead of using the QMainWindow class, we will define a class ourselves, named MainWindow, which extends the QMainWindow class. Let's see its declaration in mainwindow.h:

    class MainWindow : public QMainWindow    {        Q_OBJECT    public:        explicit MainWindow(QWidget *parent = nullptr);        ~MainWindow();    private:        void initUI();    private:        QMenu *fileMenu;        QMenu *viewMenu;        QToolBar *fileToolBar;        QToolBar *viewToolBar;        QGraphicsScene *imageScene;        QGraphicsView *imageView;        QStatusBar *mainStatusBar; QLabel *mainStatusLabel; ...