1.QAction void addAction(QAction * action, ActionPosition position) QLineEdit::LeadingPosition//前面 QLineEdit::TrailingPosition//后面 2.自定义 QMargins mar
//重写虚函数 QRectF boundingRect() const;//预计绘制的区域 void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget /* = 0 */);//绘制 QR
MyXmlReader::MyXmlReader(QWidget *parent) : QDialog(parent) { ui.setupUi(this); connect(ui.openBtn, SIGNAL(clicked()), this, SLOT(openFile