: QMainWindow(parent)

, ui(new Ui::MainWindow)

{

ui->setupUi(this);

/* ³õʼ»¯Action²Ëµ¥ */

QMenu* actionMenu = new QMenu("Action");

QAction* leftAction = new QAction("Left", this);

QAction* rightAction = new QAction("Right", this);

QAction* centerAction = new QAction("Center", this);

QAction* justifyAction = new QAction("Justify", this);

QActionGroup* actionGroup = new QActionGroup(this);

actionMenu->addAction(actionGroup->addAction(leftAction));

actionMenu->addAction(actionGroup->addAction(rightAction));

actionMenu->addAction(actionGroup->addAction(centerAction));

actionMenu->addAction(actionGroup->addAction(justifyAction));

ui->menubar->addMenu(actionMenu);

QAction* leftAlignAct = new QAction("leftAlignAct", this);

QAction* rightAlignAct = new QAction("rightAlignAct", this);

QAction* justifyAct = new QAction("justifyAct", this);

QAction* centerAct = new QAction("centerAct", this);

QActionGroup* alignmentGroup = new QActionGroup(this);

alignmentGroup->addAction(leftAlignAct);

alignmentGroup->addAction(rightAlignAct);

alignmentGroup->addAction(justifyAct);

alignmentGroup->addAction(centerAct);

leftAlignAct->setChecked(true);

ui->menubar->addActions(alignmentGroup->actions());