Qt标准对话框之QFileDialog

最新推荐文章于 2024-09-04 22:00:00 发布

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本文介绍如何使用Qt创建菜单栏和工具栏，并通过示例代码展示了如何添加文件操作选项，如打开、保存及另存为等功能，并设置快捷键。

在mainwindow.h MainWindow类添加:

public slots:
    void openDlg();
    void saveDlg();

构造函数添加:

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    resize(600,600);
    QMenu *menu_F = menuBar()->addMenu(tr("文件(&F)"));
    QAction *openAction = new QAction(tr("打开"));
    QIcon icon1(tr(":/image/open.ico"));
    openAction->setIcon(icon1);
    openAction->setShortcut(QKeySequence(tr("Ctrl+O")));
    QAction *saveAction = new QAction(tr("保存"));
    QIcon icon2(tr(":/image/save.ico"));
    saveAction->setIcon(icon2);
    saveAction->setShortcut(QKeySequence(tr("Ctrl+S")));
    QAction *save_asAction = new QAction(tr("另存为"));
    QIcon icon3(tr(":/image/save_as.ico"));
    save_asAction->setIcon(icon3);
    save_asAction->setShortcut(QKeySequence(tr("Ctrl+A")));
    menu_F->addAction(openAction);
    menu_F->addAction(saveAction);
    menu_F->addAction(save_asAction);
    QToolBar *file = addToolBar(tr("文件"));
    file->addAction(openAction);
    file->addAction(saveAction);
    file->addAction(save_asAction);
    file->addSeparator();//增加分隔符
    connect(openAction,&QAction::triggered,this,&MainWindow::openDlg);
    connect(saveAction,&QAction::triggered,this,&MainWindow::saveDlg);
    connect(save_asAction,&QAction::triggered,this,&MainWindow::saveDlg);
}

openDlg

void MainWindow::openDlg()
{
    QString filename = QFileDialog::getOpenFileName(this,tr("打开"),tr("C:"),tr("图片文件(*.png *.jpg);;文本文件(*.txt)"));
    //QStringList filenames = QFileDialog::getOpenFileNames(this,tr("打开"),tr("C:"),tr("图片文件(*.png *.jpg);;文本文件(*.txt)"));
    //....
}

saveDlg

void MainWindow::saveDlg()
{
   QString savefile = QFileDialog::getSaveFileName(this,tr("保存"),tr("未命名"),tr("图片文件(*.png *.jpg);;文本文件(*.txt)"));
   //.....
}