6.添加动作

// !!! Qt 5
// ========== mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();
 
private:
    void open();
 
    QAction *openAction;
};
 
#endif // MAINWINDOW_H
 
// ========== mainwindow.cpp
#include <QAction>
#include <QMenuBar>
#include <QMessageBox>
#include <QStatusBar>
#include <QToolBar>
 
#include "mainwindow.h"
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent)
{
    setWindowTitle(tr("Main Window"));
 
    openAction = new QAction(QIcon(":/images/doc-open"), tr("&Open..."), this);
    openAction->setShortcuts(QKeySequence::Open);
    openAction->setStatusTip(tr("Open an existing file"));
    connect(openAction, &QAction::triggered, this, &MainWindow::open);
 
    QMenu *file = menuBar()->addMenu(tr("&File"));
    file->addAction(openAction);
 
    QToolBar *toolBar = addToolBar(tr("&File"));
    toolBar->addAction(openAction);
 
    statusBar() ;
}
 
MainWindow::~MainWindow()
{
}
 
void MainWindow::open()
{
    QMessageBox::information(this, tr("Information"), tr("Open"));
}


int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    MainWindow win;
    win.show();
 
    return app.exec();
}

// !!! Qt 5

// ========== mainwindow.h

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

class MainWindow : public QMainWindow

{

    Q_OBJECT

public:

    MainWindow(QWidget *parent = 0);

    ~MainWindow();

private:

    void open();

    QAction *openAction;

};

#endif // MAINWINDOW_H

// ========== mainwindow.cpp

#include <QAction>

#include <QMenuBar>

#include <QMessageBox>

#include <QStatusBar>

#include <QToolBar>

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent)

{

    setWindowTitle(tr("Main Window"));

    openAction = new QAction(QIcon(":/images/doc-open"), tr("&Open..."), this);

    openAction->setShortcuts(QKeySequence::Open);

    openAction->setStatusTip(tr("Open an existing file"));

    connect(openAction, &QAction::triggered, this, &MainWindow::open);

    QMenu *file = menuBar()->addMenu(tr("&File"));

    file->addAction(openAction);

    QToolBar *toolBar = addToolBar(tr("&File"));

    toolBar->addAction(openAction);

    statusBar() ;

}

MainWindow::~MainWindow()

{

}

void MainWindow::open()

{

    QMessageBox::information(this, tr("Information"), tr("Open"));

}

int main(int argc, char *argv[])

{

    QApplication app(argc, argv);

    MainWindow win;

    win.show();

    return app.exec();

}

附件列表

• MainWindow添加动作.jpg