qt 标准对话框

if (QMessageBox::Yes == QMessageBox::question(this, tr("Question"),

                                              tr("Are you OK?"),

                                              QMessageBox::Yes | QMessageBox::No,

                                              QMessageBox::Yes))

{

    QMessageBox::information(this, tr("Hmmm..."), tr("I'm glad to hear that!"));

} else {

    QMessageBox::information(this, tr("Hmmm..."), tr("I'm sorry!"));

}

 

QMessageBox类的 static 函数优点是方便使用，缺点也很明显：非常不灵活。我们只能使用简单的几种形式。为了能够定制QMessageBox细节，我们必须使用QMessageBox的属性设置 API。如果我们希望制作一个询问是否保存的对话框，我们可以使用如下的代码：

QMessageBox msgBox;

msgBox.setText(tr("The document has been modified."));

msgBox.setInformativeText(tr("Do you want to save your changes?"));

msgBox.setDetailedText(tr("Differences here..."));

msgBox.setStandardButtons(QMessageBox::Save

                          | QMessageBox::Discard

                          | QMessageBox::Cancel);

msgBox.setDefaultButton(QMessageBox::Save);

int ret = msgBox.exec();

switch (ret) {

case QMessageBox::Save:

    qDebug() << "Save document!";

    break;

case QMessageBox::Discard:

    qDebug() << "Discard changes!";

    break;

case QMessageBox::Cancel:

    qDebug() << "Close document!";

    break;

}