用例实现

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
{
    QWidget* w = new QWidget(this);

    QHBoxLayout* hbox = new QHBoxLayout();

    QVBoxLayout* vBox = new QVBoxLayout();
    menuA = new MainMenuListView(w, "Images");
    menuB = new MainMenuListView(w, "Videos");
    menuC = new MainMenuListView(w, "Devices");
    vBox->addWidget(menuA);
    vBox->addWidget(menuB);
    vBox->addWidget(menuC);
    vBox->setSpacing(0);
    hbox->addLayout(vBox);

    QPlainTextEdit* textEdit = new QPlainTextEdit(w);
    hbox->addWidget(textEdit);

    w->setLayout(hbox);
    setCentralWidget(w);

    move((QApplication::desktop()->screenGeometry().width() / 2) - (size().width() / 2),
         (QApplication::desktop()->screenGeometry().height() / 2) - (size().height() / 2));

}

MainWindow::~MainWindow() {}