Russian Qt Forum

#define KEY_I Qt::UserRole+1
#define KEY_J Qt::UserRole+2

item->setData(KEY_I, i);
item->setData(KEY_J, j);

int i,j;
i = item->data(KEY_I).toInt();
j = item->data(KEY_J).toInt();

//////////////////////// myitem.h ////////////////////////////////
#ifndef MYITEM_H
#define MYITEM_H
#include <QPainter>
#include <QGraphicsItem>
#include <QDebug>
#include <QMessageBox>

class MyItem : public QGraphicsItem
{
public:
    int i,j;
    MyItem();
    QRectF boundingRect() const;
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);

    void setData(int key, const QVariant &value)   
   {
        i=value.toInt();
    }

    ~MyItem();
protected:
    void mousePressEvent(QGraphicsSceneMouseEvent *event);

private:
    QMessageBox *qb;

};

#endif // MYITEM_H


//////////////////////// myitem.cpp ////////////////////////
MyItem::MyItem()
{
}


void MyItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{

    QRectF rec = boundingRect();
    QBrush brush(Qt::blue);

    painter->fillRect(rec,brush);
    painter->drawRect(rec);
}

void MyItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    QGraphicsItem::mousePressEvent(event);
    qb = new QMessageBox();
 //   qb->setText(QString::number(ik)+" "+QString::number(jk));
    qb->show();
}

MyItem::~MyItem(){}

//////////////////////// dialog.cpp   //////////////////////////
#include "dialog.h"
#include "ui_dialog.h"

#define KEY_I Qt::UserRole+1
#define KEY_J Qt::UserRole+2
   
    int i1,j1;


Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{

    ui->setupUi(this);

    scene = new QGraphicsScene(this);
    ui->graphicsView->setScene(scene);
   square = new MyItem();

    for (j1=0; j1<10; j1++)
        for (i1=0; i1<10; i1++)
 {
         square->setData(KEY_I, i1);
         square->setData(KEY_J, j1);
         scene->addItem(square);
}

}

Dialog::~Dialog()
{
    delete ui;
}

QRectF MyItem::boundingRect() const
{

    return QRectF(i1*5,j1*5,3,3);
}