How do I create a 2 dimensional array of QGraphicsRectItems?

I need to display a dynamic amount of QGraphicsRectItems in a QGraphicsView in rows and columns, so I decided to create a 2D array, but I always get an error. This is my header:

Code:

---

#ifndef MAINWINDOW_H
    #define MAINWINDOW_H
 
    #include <QGraphicsRectItem>
    #include <QMainWindow>
    #include <QGraphicsScene>
 
    namespace Ui{
        class MainWindow;
    }
 
    class MainWindow : public QMainWindow{
        Q_OBJECT        
 
        public:
            explicit MainWindow(QWidget *parent = 0);
            ~MainWindow();
 
        private:
            Ui::MainWindow *ui;
            QGraphicsRectItem*** objRect; //This would be my 2D array
    };
 
    #endif // MAINWINDOW_H

---

This is how I instance it:

Code:

---

objRect = new QGraphicsRectItem**[x];
        for(int i = 0; i < x; i++){
            objRect[i] = new QGraphicsRectItem*[x];
        }

---

The code above runs perfectly with no errors. But whenever I try to do something with it, like establishing the size of one of the rectangles, it throws me an error message:

Code:

---

objRect[0][0]->setRect(0,0,100,100);

---

If I run the program normally, no error message appears, but the window doesn't even appear. I can only see the error message if I run the project in Debug mode.

This is the error message:

Attachment 12543

"The inferior stopped because it received a message from the operating system"

Signal name: SIGSEGV

Signal meaning: Segmentation fault

I've tried a lot of different ways of instancing it, but nothing seems to work.

Hi, think it would be easier to use a standard container like QVector or QList instead of creating the array by yourself.

Ginsengelf

So far good, but where are you allocating the object, that is only thing missing.

Here is a generic example

Code:

---

template <typename T>
T *** New2DArray(int rows, int cols)
{
    T *** array = new T**[rows];
 
    for(int r = 0; r < rows; ++r)
    {
        array[r] = new T*[cols];
 
        for(int c = 0; c < cols; ++c)
            array[r][c] = new T;
    }
 
    return array;
}
 
template <typename T>
void Delete2DArray(T *** array, int rows, int cols)
{
    for(int r = 0; r < rows; ++r)
    {
        for(int c = 0; c < cols; ++c)
            delete array[r][c];
 
        delete[] array[r];
    }
 
    delete[] array;
}
 
...
QGraphicsRectItem *** objRect = New2DArray<QGraphicsRectItem>(rows, cols);
...
Delete2DArray(array, rows, cols);
...

---