QT5（6）对话框

比眉伴天荒 2021-06-10 20:42 447阅读 0赞

![这里写图片描述][20161007183635328]

## **一、文件对话框QFileDialog** ##

void Dialog::showFile()
    {
        QString s = QFileDialog::getOpenFileName(this,"open file dialog","/","C++ files(*.cpp)::C files(*.c)::Head files(*.h)");
        fileLineEdit->setText(s);
    }

## **二、颜色对话框QColorDialog** ##

void Dialog::showColor()
    {
        QColor c = QColorDialog::getColor(Qt::blue);
        if(c.isValid())
        {
            colorFrame->setPalette(QPalette(c));
        }
    }

## **三、字体对话框QFontDialog** ##

void Dialog::showFont()
    {
        bool ok;
        QFont f = QFontDialog::getFont(&ok);
        if (ok)
        {
            fontLineEdit->setFont(f);
        }
    }

## **四、输入对话框QInputDialog** ##

//标准字符串输入
    void InputDlg::ChangeName()
    {
        bool ok;
        QString text=QInputDialog::getText(this,tr("标准字符串输入对话框"),tr("请输入姓名："), QLineEdit::Normal,nameLabel2->text(),&ok);
        if (ok && !text.isEmpty())
            nameLabel2->setText(text);
    }
    //标准int类型输入
    void InputDlg::ChangeAge()
    {
        bool ok;
        int age = QInputDialog::getInt(this, tr("标准int类型输入对话框"),
         tr("请输入年龄："), ageLabel2->text().toInt(&ok), 0, 100, 1, &ok);
        if (ok)
            ageLabel2->setText(QString(tr("%1")).arg(age));
    }
    //标准double输入
    void InputDlg::ChangeScore()
    {
        bool ok;
        double score = QInputDialog::getDouble(this, tr("标准double类型输入对话框"),
         tr("请输入成绩："),scoreLabel2->text().toDouble(&ok), 0, 100, 1, &ok);
        if(ok)
            scoreLabel2->setText(QString(tr("%1")).arg(score));
    }

## **六、消息对话框MsgBoxDlg** ##

void Dialog::showMsgDlg()
    {
        msgDlg =new MsgBoxDlg();
        msgDlg->show();
    }
    //Question消息对话框
    void MsgBoxDlg::showQuestionMsg()
    {
        label->setText(tr("Question Message Box"));
        switch(QMessageBox::question(this,tr("Question消息框"),
              tr("您现在已经修改完成，是否要结束程序？"),
              QMessageBox::Ok|QMessageBox::Cancel,QMessageBox::Ok))
        {
        case QMessageBox::Ok:
            label->setText("Question button/Ok");
            break;
        case QMessageBox::Cancel:
            label->setText("Question button/Cancel");
            break;
        default:
            break;
        }
        return;
    }
    //Information消息对话框
    void MsgBoxDlg::showInformationMsg()
    {
        label->setText(tr("Information Message Box"));
        QMessageBox::information(this,tr("Information消息框"),
                                 tr("这是Information消息框测试，欢迎您！"));
        return;
    }
    //Warning消息对话框
    void MsgBoxDlg::showWarningMsg()
    {
        label->setText(tr("Warning Message Box"));
        switch(QMessageBox::warning(this,tr("Warning消息框"),
             tr("您修改的内容还未保存，是否要保存对文档的修改？"),
             QMessageBox::Save|QMessageBox::Discard|QMessageBox::Cancel,
             QMessageBox::Save))
        {
        case QMessageBox::Save:
            label->setText(tr("Warning button/Save"));
            break;
        case QMessageBox::Discard:
            label->setText(tr("Warning button/Discard"));
            break;
        case QMessageBox::Cancel:
            label->setText(tr("Warning button/Cancel"));
            break;
        default:
            break;
        }
        return;
    }
    //Critical消息对话框
    void MsgBoxDlg::showCriticalMsg()
    {
        label->setText(tr("Critical Message Box"));
        QMessageBox::critical(this,tr("Critical消息框"),tr("这是一个Critical消息框测试！"));
        return;
    }
    //About消息对话框
    void MsgBoxDlg::showAboutMsg()
    {
        label->setText(tr("About Message Box"));
        QMessageBox::about(this,tr("About消息框"),tr("这是一个About消息框测试！"));
        return;
    }
    //AboutQt消息对话框
    void MsgBoxDlg::showAboutQtMsg()
    {
        label->setText(tr("About Qt Message Box"));
        QMessageBox::aboutQt(this,tr("About Qt消息框"));
        return;
    }

[20161007183635328]: /images/20210520/6f085fb269754442acf96bc19c1cd479.png