Some problem with painter's fillpath() method

[salmanmanekia]

I wanted to develop an application in which i want a progress bar as in the 1st attachment so that the green bar moves around the grey bar showing the progress,but for now i cannot locate the green bar properly and by writing the below code it shows me the picture in 2nd attachment while for now i want the output as of 1st attachment.

HEADER FILE

#include <QGraphicsItem>
#include <QPainter>
#include <QPainterPath>
 
class ConfirmationScene:public QGraphicsItem
{
public:
	QRectF r1;
 
	QPainterPath path;
 
 
 
	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
	                       QWidget *widget);
	QRectF boundingRect() const;
 
	ConfirmationScene();
	~ConfirmationScene();
};

#include <QGraphicsItem>
#include <QPainter>
#include <QPainterPath>

class ConfirmationScene:public QGraphicsItem
{
public:
	QRectF r1;
	
	QPainterPath path;

	
	
	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
	                       QWidget *widget);
	QRectF boundingRect() const;
	
	ConfirmationScene();
	~ConfirmationScene();
};

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SOURCE FILE

#include "ConfirmationScene.h"
 
ConfirmationScene::ConfirmationScene()
{
	r1.setRect(10,10,50,50);
	path.addEllipse(r1);
 
}
 
void ConfirmationScene::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                       QWidget *widget)
            {
 
				painter->setPen(QPen(QBrush(Qt::gray,Qt::SolidPattern),30,Qt::SolidLine,Qt::FlatCap,Qt::MiterJoin));
                painter->drawEllipse(0, 0, 200, 200);
 
                painter->fillPath(path,QBrush(Qt::green,Qt::SolidPattern));
                painter->drawPath(path);
            }
QRectF ConfirmationScene::boundingRect() const
            {
                qreal penWidth = 150;
                return QRectF(-10 - penWidth / 2, -10 - penWidth / 2,20 + penWidth / 2, 20 + penWidth / 2);
            }
ConfirmationScene::~ConfirmationScene()
{
}

#include "ConfirmationScene.h"

ConfirmationScene::ConfirmationScene()
{
	r1.setRect(10,10,50,50);
	path.addEllipse(r1);

}

void ConfirmationScene::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                       QWidget *widget)
            {
				
				painter->setPen(QPen(QBrush(Qt::gray,Qt::SolidPattern),30,Qt::SolidLine,Qt::FlatCap,Qt::MiterJoin));
                painter->drawEllipse(0, 0, 200, 200);
                
                painter->fillPath(path,QBrush(Qt::green,Qt::SolidPattern));
                painter->drawPath(path);
            }
QRectF ConfirmationScene::boundingRect() const
            {
                qreal penWidth = 150;
                return QRectF(-10 - penWidth / 2, -10 - penWidth / 2,20 + penWidth / 2, 20 + penWidth / 2);
            }
ConfirmationScene::~ConfirmationScene()
{
}

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