Can't get positions of QGraphicsItems in scene - qt

Question

I am trying to get the positions of the graphicsitems in the scene.
But their QPointF value always remains (0,0).
I am painting when mouse-click event occurs. On debugging scene->items(), I get
(QGraphicsItem(this =0x22edff0, parent =0x0, pos =QPointF(0, 0) , z = 0 , flags = ( ) ) )
for each graphics item in scene but with different memory address.
This is my mainwindow.cpp code:
#include "mainwindow.h"
#include <QDebug>
MainWindow::MainWindow()
{
scene = new QGraphicsScene;
view = new QGraphicsView;
view->setScene(scene);
button = new QPushButton("Item");
QGridLayout *layout = new QGridLayout;
layout->addWidget(button);
layout->addWidget(view);
setLayout(layout);
connect(button, SIGNAL(clicked()), this, SLOT(createItem()));
}
void MainWindow::createItem()
{
myEntity = new Item;
scene->addItem(myEntity);
count_items();
}
void MainWindow::count_items()
{
qDebug() << scene->items().count();
qDebug() << scene->items();
}
MainWindow::~MainWindow()
{}
This is my item.cpp code:
#include "item.h"
Item::Item()
{
ClickFlag = true;
PaintFlag = false;
}
Item::~Item(){}
QRectF Item::boundingRect() const
{
// outer most edges
return QRectF(0,0,1450,1400);
}
void Item::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
if(event->button()==Qt::LeftButton){
if(ClickFlag){
x = event->pos().x();
y = event->pos().y();
PaintFlag = true;
ClickFlag = false;
}
}
}
void Item::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
if(PaintFlag){
QPen paintPen;
paintPen.setWidth(4);
pt.setX(x);
pt.setY(y);
painter->setPen(paintPen);
painter->drawPoint(x,y);
update();
}
}
I can't seem to find the position of these items correctly.

Answer 1

This task is supposed to be implemented in another way. For example:
Use QGraphicsScene::addEllipse to add small ellipse (which will look like a point) to the scene. Save the pointer to it in a class variable. The ellipse itself should be at the center, e.g. (-1, -1, 2, 2).
Reimplement QGraphicsScene::mousePressEvent, detect mouse clicks and call setPos for the ellipse item (or add new ellipse each time and immediately call setPos if you need multiple points).
Use QGraphicsItem::pos to get previously set positions.
Reimplementing QGraphicsItem::paint is usually an over-complication. Qt have plenty of item classes for all common needs. Just build your scene from geometric primitives, pixmaps, etc.