QT 随笔



1. 设置窗体属性，无边框 | 置顶

setWindowFlags(Qt::FramelessWindowHint);

setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);

2. 槽-信号机制中用到自己定义数据类型:

class MyTest

{

};

class MyThread: public QThread

{

 Q_OBJECT

signals:

 void thesignal(bool noerror, const MyTest& MyTest);

 

public:

 virtual void run(); 

};

除Q_OBJECT。须要加:

qRegisterMetaType<MyTest>("MyTest");

3. 槽函数中通过“QObject::sender()”获取谁发送的信号

QCheckBox* Chb = dynamic_cast<QCheckBox*>(QObject::sender());

4. Radio button 状态以图片方式显示

QString style = "QRadioButton { spacing: 5px; } QRadioButton::indicator{ width: 24px;height: 24px;}QRadioButton::indicator:unchecked{    image:url(:/radiobutton_off);}QRadioButton::indicator:checked{  image:url(:/radiobutton_on);} ";

ui.onceRadioBtn->setStyleSheet(style);

对checkbox控件也适用

5. 改变字体，能够直接使用windows下字体

Application theApp(argc, argv); 

theApp.setFont(QFont("simsun", 11));

6. 获取mac，ip

/* Get all interface (IP / Mask / MAC) */

QNetworkInterface InterfaceEth0 = QNetworkInterface::interfaceFromName("eth0");

QString mac = InterfaceEth0.hardwareAddress();

foreach(QNetworkAddressEntry addressE , InterfaceEth0.addressEntries()) {

 if(addressE.ip().protocol() == QAbstractSocket::IPv4Protocol &&

  addressE.broadcast() != QHostAddress::Null) {

   QString IP = addressE.ip().toString();

   QString Mask = addressE.netmask().toString();

   break;

 }

}

/* 获取全部网络接口 */

QList<QNetworkInterface> InterfaceEthList = QNetworkInterface::allInterfaces();