Single View-container-Panic

[abhinay.krs]

I m creating a listbox control and has a container class for it.
Then i have the corresponding view class for it.
There is only one view in the application that is for the listbox.
In the AppUI class in InitializeContainersL() i m doing this:

iListBoxView = CBoxView::NewL();
AddViewL( iListBoxView );
SetDefaultViewL( *iListBoxView );

But when i am exiting the application by selecting the softkey exit,
first time selecting it the control again comes to the UI displaying the lisbox data
then again when i am selecting exit it gives a KERN-EXEC 3 panic after the closing brace of the view class destructor:

CListBoxView::~CListBoxView()
{
// [[[ begin generated region: do not modify [Generated Contents]
if(iListBox)
{
AppUi()->RemoveFromViewStack( *this, iListBox );
}
delete iListBox;
iListBox = NULL;
// ]]] end generated region [Generated Contents]

}//Panic raised after here

I am not able to figure out whats the problem?
plz help me.

[symbianyucca]

Gotta admit that I hardly ever use views nowadays, anyway, do check this one: http://wiki.forum.nokia.com/index.ph...with_UI_Design

At least the example is made in a way that I remember it being made, i.e. you would not remove the views from any stack, nor would you delete it, I would suppose the View management of the appui already does that.

[abhinay.krs]

Hi,I am continuing the discussion as i still not got a solution to it.

what My application does is:
It connects to the internet downloads some data like
A-Primary text
b ,c,-secondary text
A
b,c
...
..
parses it(XML parsing)and creates a CAknDoublestyle listbox
and and its each item has the data in the form
A
b ,c
.so the whole app works well.
but when i am exiting the application it has two problems
when i click on exit in the listbox view it again displays
the listbox view.That is when i debug it the view class
HandleCommandL() handles the unhandled command by forwarding it to
the AppUI and the AppUI calls exit().
but after the execution of this line the listbox is displayed again
and again i click on exit from the menu it gives a KERN-EXEC 3 Panic.
It gives this panic after the closing brace of the view destructor that
from where i destroy the container.
It will be very helpful if you guys can tell me what could the problem be in both
the cases for having to click exit twice and second for the panic.

Thank you.

[kamalakshan]

Hi,I am continuing the discussion as i still not got a solution to it.

what My application does is:
It connects to the internet downloads some data like
A-Primary text
b ,c,-secondary text
A
b,c
...
..
parses it(XML parsing)and creates a CAknDoublestyle listbox
and and its each item has the data in the form
A
b ,c
.so the whole app works well.
but when i am exiting the application it has two problems
when i click on exit in the listbox view it again displays
the listbox view.That is when i debug it the view class
HandleCommandL() handles the unhandled command by forwarding it to
the AppUI and the AppUI calls exit().
but after the execution of this line the listbox is displayed again
and again i click on exit from the menu it gives a KERN-EXEC 3 Panic.
It gives this panic after the closing brace of the view destructor that
from where i destroy the container.
It will be very helpful if you guys can tell me what could the problem be in both
the cases for having to click exit twice and second for the panic.

Thank you.

How have you handled your HandleCommandL() function.

[abhinay.krs]

Handling HandleCommandL() means?
If it means has it been implemented in the UI and the view class then yes i have.
In the view class's HandlecommandL() i am forwarding the unhandled command to the AppUI
so i am not handling the exit command there,so when i am selecting the exit command from views menu its forwarded to the UI's HandleCommandL() which handles by checking again for the unhandled command and then if its a softkey exit then call the exit().While debugging it comes here and after that(first click on exit)it againg pops up the same listbox view instead of going to the AppUI destructor where a delete on view is called.It goes there when i am clicking on the exit second time.

[kamalakshan]

Handling HandleCommandL() means?
If it means has it been implemented in the UI and the view class then yes i have.
In the view class's HandlecommandL() i am forwarding the unhandled command to the AppUI
so i am not handling the exit command there,so when i am selecting the exit command from views menu its forwarded to the UI's HandleCommandL() which handles by checking again for the unhandled command and then if its a softkey exit then call the exit().While debugging it comes here and after that(first click on exit)it againg pops up the same listbox view instead of going to the AppUI destructor where a delete on view is called.It goes there when i am clicking on the exit second time.

The application should have exited when you click exit the first time only. How are you able to click on exit a second time.