From Forum Nokia Wiki

ID	...	Creation date	20 June 2009
Platform	S60 3rd Edition FP1, S60 3rd Edition FP2, S60 5th Edition	Tested on devices	5800 xpress muzic
Category	Qt for Symbian	Subcategory	Application

Keywords (APIs, classes, methods, functions): QGraphicsItem,QGraphicsItemAnimation

Overview

As heading of this article specifies "Animation with Transformation" ,Here the stepping of the Graphics Item and the rotation is observed.

A new coordinates for the graphics item is taken while executing through the loop and the item is shifted to that coordinate as well as rotated to a specific angle.

Name of classes used:

QGraphicsItem-Base class for all graphical items

QGraphicsItemAnimation-Provides simple animation support

Preconditions

• Download and Install latest version Qt for Symbian - Installation packages which has links on how to install the latest version

Property

• Sets the Z-value, or the elevation, of the item, to z. The elevation decides the stacking order of sibling (neighboring) items

text->setZValue(5.0);

• Sets the rotation of the item at the given step value to the angle specified.

animation->setRotationAt(i / 300.0, i);

SourceCode

main.cpp

#include <QtGui/QApplication>
#include "animation.h"
#include<QGraphicsItemAnimation>
#include<QPointF>
#include<QTimeLine>
#include<QGraphicsItem>
#include<QGraphicsSimpleTextItem>
#include<QGraphicsScene>
#include<QGraphicsView>
#include<QHBoxLayout>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
 
    QGraphicsItem *text = new QGraphicsSimpleTextItem("Viral");
    text->setAcceptDrops(1);
    //text->setOpacity(0.0);
    text->setAcceptHoverEvents(true);
    text->setZValue(5.0);
    QHBoxLayout *lay=new QHBoxLayout();
    QTimeLine *timer = new QTimeLine(5000);
    timer->setFrameRange(0, 100);
 
    QGraphicsItemAnimation *animation = new QGraphicsItemAnimation();
    animation->setItem(text);
    animation->setTimeLine(timer);
    int i;
    for (i = 0; i <= 250; ++i)//getting the coordinates
        animation->setPosAt(i/250.0,QPointF(i, i));//positioning the graphicsItem
 
        animation->setRotationAt(i / 300.0, i);//rotation of graphicsItem.
 
 
 
 
    QGraphicsScene *scene = new QGraphicsScene();
    scene->setSceneRect(0, 0, 250, 250);//rectuangular scene built
    scene->addItem(text);
 
    QGraphicsView *view = new QGraphicsView(scene);
    view->show();
 
   timer->start();//start timer to view animation 
 
   return a.exec();
}

ScreenShot