Dear Everyone!

I am animating text using QTimeline & QGraphicsItem Class. I am facing problem of varing velocity (speed of text) of text if text size is not equal for multiple animation. I want to constant velocity (animation speed constant) for variable length text. What can I do for this.

I am putting the code for that....
Qt Code: 
  1. QGraphicsTextItem *scrItem = new QGraphicsTextItem(txtScrollEdit->toPlainText());
  2. 	QDir::setCurrent(QDir::currentPath ()+"/media");
  4.  
  5. 	scrItem->setDefaultTextColor(Qt::red);
  6. 	scene->setBackgroundBrush(Qt::yellow);
  7.  
  8.  
  10.  
  11.     animation->setItem(scrItem);
  12.  
  13.  
  14. 	float n;
  15. 	view=new QGraphicsView(scene,btgScrollText);
  16. 	view->setWindowFlags (Qt::FramelessWindowHint);
  17.  
  18. 	scene->addItem(scrItem);
  19.  
  20. 	view->setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
  21. 	view->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
  22. 	view->setCacheMode(QGraphicsView::CacheBackground);
  23.  
  24. 	n=355;	/*Width of txtScrollEdit TextEdit*/
  25.  
  26. 	qreal h=scene->height()/2-scrItem->boundingRect().height()/2;
  27.  
  28.  
  29.     register int velocity=40;
  30. 	register int tl=n*velocity;
  31.  
  32. 	timer = new QTimeLine(tl);
  33.  
  34.  
  35. 	timer->setCurveShape(QTimeLine::LinearCurve);
  36. 	timer->setLoopCount(0);
  37. 	animation->setTimeLine(timer);
  38. 	animation1->setTimeLine(timer);
  39.  
  40.  
  41. 	register int scrItembrw=scrItem->boundingRect().width();
  42. 	for (register int i=0; i<(n+scrItembrw); i=i+1)
  43. 	{
  44. 		register QPointF p(0,h); //sets the position of scrItem
  45. 		p.setX(n-i);
  46. 		p.setY(h);
  47. 		animation->setPosAt(i/(n+scrItembrw),p);
  48.  
  49. 	 }//end for
  50.  
  51. 	view->show();
  52. 	timer->start();
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Thanks in Advance!