Multiple inheritance of QGraphicsView and QGraphicsItem

[cookie1909]

I read the Graphics View Framework docs, updated the coordinates like below, but it didn't make any difference in CPU usage I'm running out of ideas of what else to try

LineButton::LineButton(int x, int y)
{
    setPos(x, y);
    mPixmapBlack = new QPixmap("black.png");
    mPixmapYellow = new QPixmap("yellow.png");
    mPic = mPixmapBlack;
}
 
QRectF LineButton::boundingRect() const                                                                                                    
{                                                                                                                                          
    return QRectF(0, 0,  LINE_BUTTON_WIDTH, LINE_BUTTON_HEIGHT); 
}                                                                                                                                          
 
void LineButton::paint( 
    QPainter *painter, 
    const QStyleOptionGraphicsItem *option, 
    QWidget *) 
{                                                                                                                                          
    painter->drawPixmap(0, 0, *mPic); 
}          
 
void LineButton::blink()                                                                                                             
{                                                                                                                                          
    if (mPic == mPixmapBlack)  
        mPic = mPixmapYellow;     
   else 
        mPic = mPixmapBlack;        
   QGraphicsItem::update(boundingRect()); 
}

LineButton::LineButton(int x, int y)
{
    setPos(x, y);
    mPixmapBlack = new QPixmap("black.png");
    mPixmapYellow = new QPixmap("yellow.png");
    mPic = mPixmapBlack;
}

QRectF LineButton::boundingRect() const                                                                                                    
{                                                                                                                                          
    return QRectF(0, 0,  LINE_BUTTON_WIDTH, LINE_BUTTON_HEIGHT); 
}                                                                                                                                          
                                                                                                                                           
void LineButton::paint( 
    QPainter *painter, 
    const QStyleOptionGraphicsItem *option, 
    QWidget *) 
{                                                                                                                                          
    painter->drawPixmap(0, 0, *mPic); 
}          
 
void LineButton::blink()                                                                                                             
{                                                                                                                                          
    if (mPic == mPixmapBlack)  
        mPic = mPixmapYellow;     
   else 
        mPic = mPixmapBlack;        
   QGraphicsItem::update(boundingRect()); 
}

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