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;

}

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;

}

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");

    }

}

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;

    }

}

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"));

}

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");

}

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();

}