?? cannon.h
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#ifndef CANNON_H#define CANNON_H#include <qwidget.h>class QTimer;class CannonField : public QWidget{ Q_OBJECT; public: CannonField( QWidget *parent=0, const char *name=0 ); int angle() const {return ang;} QSizePolicy sizePolicy( ) const; public slots: void setAngle( int degrees ); void paintSet( ); void simulate( ); private slots: void timerTest(); signals: void angleChanged( int ); protected: void paintEvent( QPaintEvent * ); private: int ang; int timerCount; QTimer * autoShootTimer; };#endif?? 快捷鍵說明
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