reserve a space of a list

hey,

I have created a list of qstring pointers without problems. But now, i want to make this list bigger and reseved some positions free.
To get it, i have done this one:

MENU *p1 = new MENU();
TWO *p2 = new TWO();
THREE *p3 = new THREE();
FOUR *p4 = new FOUR();
FIVE *p5 = new FIVE();
SIX *p6 = new SIX();



QList<QWidget*> list;
list.insert(0,p1);
list.insert(1,null);//free
list.insert(2,null);//free
list.insert(3,null);//free
list.insert(4,null);//free
list.insert(5,null);//free
list.insert(6,null);//free
list.insert(7,null);//free
list.insert(8,null);//free
list.insert(9,null);//free

list.insert(10,p2);
list.insert(11,null);//free
list.insert(12,null);//free
list.insert(13,null);//free
list.insert(14,null);//free
list.insert(15,null);//free
list.insert(16,null);//free
list.insert(17,null);//free
list.insert(18,null);//free
list.insert(19,null);//free

list.insert(20,p3);
list.insert(21,null);//free
list.insert(22,null);//free
list.insert(23,null);//free
list.insert(24,null);//free
list.insert(25,null);//free
list.insert(26,null);//free
list.insert(27,null);//free
list.insert(28,null);//free
list.insert(29,null);//free

list.insert(30,p4);
list.insert(31,null);//free
list.insert(32,null);//free
list.insert(33,null);//free
list.insert(34,null);//free
list.insert(35,null);//free
list.insert(35,null);//free
list.insert(37,null);//free
list.insert(38,null);//free
list.insert(39,null);//free

list.insert(40,p5);
list.insert(41,null);//free
list.insert(42,null);//free
list.insert(43,null);//free
list.insert(44,null);//free
list.insert(45,null);//free
list.insert(46,null);//free
list.insert(47,null);//free
list.insert(48,null);//free
list.insert(49,null);//free

list.insert(50,p6);
list.insert(51,null);//free
list.insert(52,null);//free
list.insert(53,null);//free
list.insert(54,null);//free
list.insert(55,null);//free
list.insert(56,null);//free
list.insert(57,null);//free
list.insert(58,null);//free
list.insert(59,null);//free

But it dooesn't work! how can i reserve a space of this list free?

thanks

you dont need to reserve any space... just insert the new items anywhere...
but your code does not work because u are using "null" which i dont think is "0" .. try to insert number 0 or simply use a QWidget* free =0; and insert them.

iT doesn't work!
I have triyed inserting 0 instead of Null and iT doesn't work, and i have trieyed too like this:

QWidget* free =0;


QList<QWidget*> list;
list.insert(0,p1);
list.insert(1,free);//free
list.insert(2,free);//free
list.insert(3,free);//free
list.insert(4,free);//free
list.insert(5,free);//free
list.insert(6,free);//free
list.insert(7,free);//free
list.insert(8,free);//free
list.insert(9,free);//free

list.insert(10,p2);
list.insert(11,free);//free
list.insert(12,free);//free
list.insert(13,free);//free
list.insert(14,free);//free
list.insert(15,free);//free
list.insert(16,free);//free
list.insert(17,free);//free
list.insert(18,free);//free
list.insert(19,free);//free

list.insert(20,p3);
list.insert(21,free);//free
list.insert(22,free);//free
list.insert(23,free);//free
list.insert(24,free);//free
list.insert(25,free);//free
list.insert(26,free);//free
list.insert(27,free);//free
list.insert(28,free);//free
list.insert(29,free);//free

list.insert(30,p4);
list.insert(31,free);//free
list.insert(32,free);//free
list.insert(33,free);//free
list.insert(34,free);//free
list.insert(35,free);//free
list.insert(35,free);//free
list.insert(37,free);//free
list.insert(38,free);//free
list.insert(39,free);//free

list.insert(40,p5);
list.insert(41,free);//free
list.insert(42,free);//free
list.insert(43,free);//free
list.insert(44,free);//free
list.insert(45,free);//free
list.insert(46,free);//free
list.insert(47,free);//free
list.insert(48,free);//free
list.insert(49,free);//free


list.insert(50,p6);
list.insert(51,free);//free
list.insert(52,free);//free
list.insert(53,free);//free
list.insert(54,free);//free
list.insert(55,free);//free
list.insert(56,free);//free
list.insert(57,free);//free
list.insert(58,free);//free
list.insert(59,free);//free

the application run but the list doesn't work

can u tell what exactly does not work? this code compiles?

it compiles,i have set (in my application) that when it runs, it must show the menu screen.
This screen has some buttons to go to two,three... sceens. So when I push in menu screen to go to another screen the aplication hide.

so this is not the problem of list.. this is something where you forgot to call show or even did not connected the signal... please provide a minimal compilable code for u to help you.

So, maybe you could use QStackedWidget for your Porblem.
Or in your case, you can use a QVector instead:

Code:

---

QWidget* free =0;
QVector<QWidget*> vec(60, free);
vec[0] = p1;
vec[10] = p2;
vec[20] = p3;
vec[30] = p4;
vec[40] = p5;
vec[50] = p6;

---

Best Regards
NoRulez