QT菜单项里面的子菜单做工具栏切换

 

#include "mainwindow.h"
#include <QMenu>
#include <QMenuBar>
#include <QToolBar>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QMenuBar *mBar = this->menuBar();//菜单栏

    QMenu *menu = mBar->addMenu("文件");//菜单
    QMenu *edit = mBar->addMenu("编辑");
    QMenu *window = mBar->addMenu("窗体");

    QAction *toolbartoggles_ = new QAction("工具栏切换") ;//工具栏切换菜单项

    QAction *new_ = new QAction("新建");
    QAction *open_ = new QAction("打开");
    QAction *save_ = new QAction("保存");

    menu->addAction(new_);
    menu->addAction(open_);
    menu->addAction(save_);

    QAction *brushtool_ = new QAction("画刷");
    QAction *erase_ = new QAction("橡皮");
    QAction *line_ = new QAction("线条");

    edit->addAction(brushtool_);
    edit->addAction(erase_);
    edit->addAction(line_);

    QMenu *togglemenu = new QMenu(this);//切换菜单 用来做子菜单

    //文件工具栏
    QToolBar *filetools = new QToolBar(tr("文件工具栏"));
    filetools->setObjectName("filetoolsbar");
    filetools->addAction(new_);//工具栏增加菜单项
    filetools->addAction(open_);
    filetools->addAction(save_);
    togglemenu->addAction(filetools->toggleViewAction());//把文件工具栏增加到切换菜单里面
    addToolBar(Qt::TopToolBarArea, filetools);//工具栏显示到顶部工具栏区域

    //绘画工具栏
    QToolBar *drawtools = new QToolBar("绘图工具栏");
    drawtools->setObjectName("drawtoolsbar");
    drawtools->addAction(brushtool_);
    drawtools->addAction(erase_);
    drawtools->addAction(line_);
    togglemenu->addAction(drawtools->toggleViewAction());
    addToolBar(Qt::LeftToolBarArea, drawtools);

    toolbartoggles_->setMenu(togglemenu);

    window->addAction(toolbartoggles_);
}

MainWindow::~MainWindow()
{
}