在主窗口基础之上，添加菜单和工具栏等的动作。
// !!! 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();
}x
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1
// !!! Qt 52
// ========== mainwindow.h3
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class MainWindow : public QMainWindow9
{10
Q_OBJECT11
public:12
MainWindow(QWidget *parent = 0);13
~MainWindow();14
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private:16
void open();17
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QAction *openAction;19
};20
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// MAINWINDOW_H22
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// ========== mainwindow.cpp24
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MainWindow::MainWindow(QWidget *parent) :33
QMainWindow(parent)34
{35
setWindowTitle(tr("Main Window"));36
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openAction = new QAction(QIcon(":/images/doc-open"), tr("&Open..."), this);38
openAction->setShortcuts(QKeySequence::Open);39
openAction->setStatusTip(tr("Open an existing file"));40
connect(openAction, &QAction::triggered, this, &MainWindow::open);41
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QMenu *file = menuBar()->addMenu(tr("&File"));43
file->addAction(openAction);44
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QToolBar *toolBar = addToolBar(tr("&File"));46
toolBar->addAction(openAction);47
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statusBar() ;49
}50
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MainWindow::~MainWindow()52
{53
}54
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void MainWindow::open()56
{57
QMessageBox::information(this, tr("Information"), tr("Open"));58
}59
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int main(int argc, char *argv[])62
{63
QApplication app(argc, argv);64
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MainWindow win;66
win.show();67
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return app.exec();69
}
