QT-仪表指针-模拟指针旋转-利用QPainter、QLable、QPixmap旋转图片-模拟仪表指针旋转

#ifndef DYNLABLE_H #define DYNLABLE_H #include <QtCore/qglobal.h> #include <QLabel> #if defined(DYNLABLE_LIBRARY) # define DYNLABLE_EXPORT Q_DECL_EXPORT #else # define DYNLABLE_EXPORT Q_DECL_IMPORT #endif class DYNLABLE_EXPORT DynLable : public QLabel { Q_OBJECT public: explicit DynLable(QWidget *parent, QRect rect, QPoint center, QString pic, float value, float initV, float rangeV, float rangeA, float roateA); //V=value,A=angle void changeAngle(float value); private: void paintEvent(QPaintEvent*); QRect m_rect; QPoint m_center; QString m_pic; float m_angel; float m_initValue; float m_rangeValue; float m_rangeAngle; float m_roateAngle; }; #endif // DYNLABLE_H