qt入門之窗口居中,沒大小化按鈕

總結學習點滴

1、窗口沒有最大化和最小化按鈕

frm->setWindowFlags(Qt::WindowCloseButtonHint);

2、窗口居中顯示

int screenX=qApp->desktop()->width();
int screenY=qApp->desktop()->height()-60;
int wndX=frm->width();
int wndY=frm->height();
QPoint movePoint((screenX-wndX)/2,(screenY-wndY)/2);
frm->move(movePoint);

3、窗口不能改變大小

frm->setFixedSize(frm->width(), frm->height());

4、設置UTF8編碼

 QTextCodec *codec = QTextCodec::codecForName("utf8");
 QTextCodec::setCodecForTr(codec);

5、獲取系統日期時間並動態顯示

getTime = new QTimer();
getTime->start(1000);
connect(getTime, SIGNAL(timeout()), this, SLOT(getDateTime()));

void Dialog::getDateTime()
{
    QDateTime timeNow = QDateTime::currentDateTime();
    ui->timelabel->setText(QString(tr("%1").arg(timeNow.toString("yyyy-MM-dd hh:mm:ss"))));
}