QMessageBox的用法

}
void MessageBox::slotWarning()
{
switch(QMessageBox::warning(this,"Warning",tr("Save changes to document?"),
QMessageBox::Save|QMessageBox::Discard|QMessageBox::Cancel,QMessageBox::Save))
label->setText(" Critical MessageBox ");
return;
}
void MessageBox::slotAbout()
{
QMessageBox::about(this,"About",tr("Message box example!"));
label->setText(" About MessageBox ");
{
case QMessageBox::Ok:
label->setText(" Question button / Ok ");
break;
case QMessageBox::Cancel:
label->setText(wk.baidu.com Question button / Cancel ");
break;
default:
void MessageBox::slotQuestion()
{
switch(QMessageBox::question(this,"Question",tr("It's end of document,search from begin?"),
QMessageBox::Ok|QMessageBox::Cancel,QMessageBox::Ok))
return;
}
void MessageBox::slotAboutQt()
{
QMessageBox::aboutQt(this,"About Qt");
label->setText(" About Qt MessageBox ");
return;
}
label->setText(" Warning button / Cancel ");
break;
default:
break;
}
return;
}
void MessageBox::slotCritical()
{
QMessageBox::critical(this,"Critical",tr("tell user a critical error"));
{
case QMessageBox::Save:
label->setText(" Warning button / Save ");
break;
case QMessageBox::Discard:
label->setText(" Warning button / Discard ");
break;
case QMessageBox::Cancel:
break;
}
return;
}
void MessageBox::slotInformation()
{
QMessageBox::information(this,"Information",tr("anything you want tell user"),QMessageBox::Ok);
return;