QT中菜单Menu与工具栏Toolbar中各个Action的动态添加删除

来源：互联网发布：淄博seo公司哪家好编辑：程序博客网时间：2024/06/06 09:46

就像Swing里面的Action一样，Qt里面也有一个类似的类，叫做QAction。顾名思义，QAction类保存有关于这个动作，也就是action的信息，比如它的文本描述、图标、快捷键、回调函数(也就是信号槽)，等等。神奇的是，QAction能够根据添加的位置来改变自己的样子——如果添加到菜单中，就会显示成一个菜单项；如果添加到工具条，就会显示成一个按钮。

代码如下：

//MainWindow.h#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>namespace Ui {class MainWindow;}class MainWindow : public QMainWindow{    Q_OBJECT    public:    explicit MainWindow(QWidget *parent = 0);    ~MainWindow();public slots:    void openFile();    void add();    void remove();private:    Ui::MainWindow *ui;    //QAction *openAcition;    QMenu *file;    QAction *addscess;    QToolBar *toolbar;    QToolBar *toolbar1;};#endif // MAINWINDOW_H

//MainWindow.cpp#include "mainwindow.h"#include "ui_mainwindow.h"#include <QDebug>MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);    QAction *openAcition = new QAction(tr("&Open"),this);    QAction *openAction = new QAction(tr("&apen"),this);    QAction *add = new QAction(tr("&add"),this);    QAction *remove = new QAction(tr("&remove"),this);    file = menuBar()->addMenu(tr("&File"));    file->addAction(openAcition);    file->addAction(add);    file->addAction(remove);    toolbar = addToolBar(tr("&File"));    toolbar->addAction(openAcition);    toolbar->addAction(openAction);    toolbar1 = addToolBar(tr("&File"));    //toolbar1->addAction(openAcition);    toolbar1->addAction(openAction);    connect(openAcition,SIGNAL(triggered()),this,SLOT(openFile()));    connect(add,SIGNAL(triggered()),this,SLOT(add()));    connect(remove,SIGNAL(triggered()),this,SLOT(remove()));}MainWindow::~MainWindow(){    delete ui;}void MainWindow::openFile(){    qDebug()<<"I did that!!";}void MainWindow::add(){    addscess = new QAction(tr("&addscess"),this);    file->addAction(addscess);    toolbar->addAction(addscess);}void MainWindow::remove(){    file->removeAction(addscess);    toolbar->removeAction(addscess);}