main.cpp

汽车的虚拟仪表盘 采样QT编程 linux下运行

#include <qdatetime.h>
#include <qpainter.h>
#include <qwidget.h>
#include <qapplication.h>
class carpanel : public QWidget
{
	public :
		carpanel( QWidget *parent =0 ,const char *name =0 );
	protected :
		void panelevent ( QTimerEvent *event );
		void paintevent ( QPaintEvent *event );

};

carpanel :: carpanel ( QWidget *parent ,const char *name ):QWidget ( parent ,name )
{
	startTimer (1000);
	resize(100,100);
}

void carpanel :: panelevent ( QTimerEvent *event)
{
	update( ) ;
}

void carpanel :: paintevent ( QPaintEvent *event )
{
	QCOORD point[8]={2,0,0,2,-2,0,0,-25};
	QPainter painter(this);
	painter.setWindow ( 0 ,0,100,100 );
//	painter.setBush(black);
	for(int i=0;i<12;i++)
	{
		painter.drawLine(44,0,46,0);
		painter.rotate(double(30));
	}
	painter.save( );
	painter.rotate(double(10));
	painter.save( );
	painter.drawPolygon(QPointArray(4,point));
	painter.restore( );
}

int main(int argc,char **argv)
{
	QApplication a(argc,argv);
	carpanel car ;
	a.setMainWidget(&car);
	car.show( );
	return a.exec( );
}