qt中的一些对话框(个人备忘录)

一、标准对话框

1.对于颜色对话框

void MyWidget::on_pushButton_clicked()
{
   QColorDialog dialog(Qt::red,this);
   dialog.setOption(QColorDialog::ShowAlphaChannel);//显示alpha选项
   dialog.exec();
   QColor color=dialog.currentColor();//获取颜色
   qDebug()<<"color:"<<color;
}

2.对于文件对话框

void MyWidget::on_pushButton_2_clicked()
{
    QString fileName=QFileDialog::getOpenFileName(this,tr("文件对话框"),"D:",tr("图片文件(*png *jpg"));
    qDebug()<<"fileName:"<<fileName;
}

3.字体对话框

void MyWidget::on_pushButton_3_clicked()
{
    bool ok;
    QFont font=QFontDialog::getFont(&ok,this);
    if(ok)
    {
        ui->pushButton_2->setFont(font);
    }
    else
    {
        qDebug()<<tr("没有你选择的字体");
    }
}

4.对于输入对话框

void MyWidget::on_pushButton_4_clicked()
{
    bool ok;
    QString string=QInputDialog::getText(this,tr("输入字符对话框"),tr("请输入用户名："),QLineEdit::Normal,tr("admin"),&ok);
    if(ok)
    {
        qDebug()<<"string:"<<string;
    }
    int value1=QInputDialog::getInt(this,tr("输入整数对话框"),tr("输入-1000到1000之间的数值"),100,-1000,1000,10,&ok);
    if(ok)
    {
        qDebug()<<"value1:"<<value1;
    }
    int value2=QInputDialog::getDouble(this,tr("输入浮点数对话框"),tr("输入-1000到1000之间的数值"),0.00,-1000,1000,2,&ok);
    if(ok)
    {
        qDebug()<<"value2:"<<value2;
    }
    QStringList items;
    items<<tr("条目1")<<tr("条目2");
    QString item=QInputDialog::getItem(this,tr("输入条目对话框"),tr("请选择或输入一个条目"),items,0,true,&ok);
    if(ok)
    {
        qDebug()<<"item:"<<item;
    }

}

5.消息对话框

void MyWidget::on_pushButton_5_clicked()
{
    int ret1=QMessageBox::question(this,tr("问题对话框"),tr("你了解qt吗"),QMessageBox::Yes,QMessageBox::No);
    if(ret1==QMessageBox::Yes)qDebug()<<tr("问题！");
    int ret2=QMessageBox::information(this,tr("提示对话框"),tr("这是Qt书籍!"),QMessageBox::Ok);
    if(ret2==QMessageBox::Ok) qDebug()<<tr("提示!");
    int ret3=QMessageBox::warning(this,tr("警告对话框"),tr("不能提前结束"),QMessageBox::Abort);
    if(ret3==QMessageBox::Abort)qDebug()<<tr("警告");
    int ret4=QMessageBox::critical(this,tr("严重错误对话框"),tr("发现一个严重的错误！，现在我要关闭所有的文件!"),QMessageBox::YesAll);
     if(ret4==QMessageBox::YesAll) qDebug()<<tr("错误");
     QMessageBox::about(this,tr("关于对话框"),tr("yafeililnux致力于Qt以及QT的普及工作"));

}

6.进度条对话框

void MyWidget::on_pushButton_6_clicked()
{
    QProgressDialog dialog(tr("文件复制框"),tr("取消"),0,50000,this);
    dialog.setWindowTitle(tr("进度对话框"));
    dialog.setWindowModality(Qt::WindowModal);
    dialog.show();
    for(int i=0;i<50000;i++)
    {
        dialog.setValue(i);
        QCoreApplication::processEvents();
        if(dialog.wasCanceled())break;
    }
    dialog.setValue(50000);
    qDebug()<<tr("复制结束");
}

7.错误对话框

8.向导对话框

QWizardPage * MyWidget::createPage1()
{
    QWizardPage * page=new QWizardPage;
    page->setTitle("介绍");
    return page;
}

QWizardPage * MyWidget::createPage2()
{
    QWizardPage * page=new QWizardPage;
    page->setTitle("用户选择信息");
    return page;
}

QWizardPage * MyWidget::createPage3()
{
    QWizardPage * page=new QWizardPage;
    page->setTitle("结束");
    return page;
}

void MyWidget::on_pushButton_8_clicked()
{
    QWizard wizard(this);
    wizard.setWindowTitle(tr("向导对话框"));
    wizard.addPage(createPage1());
    wizard.addPage(createPage2());
    wizard.addPage(createPage3());
    wizard.exec();
}