Problem with ListBox

[VictoriaY]

Hello,
I need dynamic ListBox. This is my test code (I am trying just build List with one item "Item 1"):

TBuf<32> iText;
CAknTextSettingItem* item;
CAknSettingItemList* iList;
iList = new (ELeave) CAknSettingItemList;
iList->SetMopParent(this);

_LIT(KItem1, "Item 1");
iText = KItem1;

item = new (ELeave) CAknTextSettingItem(1, iText);
CleanupStack::PushL(item);
iList->SettingItemArray()->AppendL(item);
CleanupStack::Pop(item);

I can compile it, but then emulator gives error "kern-exec 3", What I do wrong?

Thanks,
Victoria

[KevinD]

Hi Victoria,

Can't be certain without knowing where your KERN-EXEC 3 occurred, but it seems most likely that this is happening because you haven't completed construction of the setting item list. new (ELeave) and SetMopParent() are not enough - You will need to also call ConstructL() to complete construction, or better still ConstructFromResourceL().

Kevin
www.symsource.com

[wizard_hu_]

Note that setting lists are not exactly lists, they are more like a special kind of a form, and in practice their API is one of the worst on Symbian.
For having a simple list, start with some simple text-mode listbox such as CAknDoubleStyleListbox:

void CSampleContainer::ConstructL(const TRect& aRect)
    {
    CreateWindowL();

    iListBox = new (ELeave) CAknDoubleStyleListBox;
    iListBox->ConstructL(this, EAknListBoxSelectionList);
    iListBox->SetContainerWindowL(*this);
    iListBox->CreateScrollBarFrameL(ETrue);
    iListBox->ScrollBarFrame()->SetScrollBarVisibilityL( CEikScrollBarFrame::EOff, CEikScrollBarFrame::EAuto);
    FillListBoxL();

    SetRect(aRect);
    ActivateL();
    }

CSampleContainer::~CSampleContainer()
    {
    delete iListBox;
    }

void CSampleContainer::SizeChanged()
    {
    iListBox->SetRect(Rect());    
    }

TInt CSampleContainer::CountComponentControls() const
    {
    return 1;
    }

CCoeControl* CSampleContainer::ComponentControl(TInt aIndex) const
    {
    switch ( aIndex )
        {
        case 0:
            return iListBox;
        default:
            return NULL;
        }
    }

void CSampleContainer::FillListBoxL()
{
    CDesCArray* array = static_cast<CDesCArray*> (iListBox->Model()->ItemTextArray());
    _LIT(KFormat, "\tItem\t%d");
    TBuf<30> string;
	
    for (int i=1; i<11; i++) {
        string.Format(KFormat, i*100);
        array->AppendL(string);
	}
    iListBox->HandleItemAdditionL();

}

TKeyResponse CSampleContainer::OfferKeyEventL(const TKeyEvent &aKeyEvent, TEventCode aType)
{
    return iListBox->OfferKeyEventL(aKeyEvent, aType);
}

Where CSampeContainer is a CCoeControl, and iListBox is a CAknDoubleStyleListBox.

[VictoriaY]

Thaks a lot for a wondefull example!

[roman.ahmed]

hi,
i just done as you coded....but still i'm facing application problem....& when i'm going Tools-->Preference......"Cannot start ECMT manager" this warning occuring ...how i can solve this problem ...plz guide me...

[roman.ahmed]

hi,
i've solved Cannot "start ECMT manager" message showing problem....now i can see the panic code....

[wizard_hu_]

And how do your posts relate to the fact that Victoria asked for and got an example almost a year ago?

[roman.ahmed]

hu,
what are you asking about...?...how i've solved "Cannot start ECMT manager" this message showing...?

[sohilr]

hi wizard_hu,

thanks for the example...
Initially i was trying with the following code...

	CDesC16Array *itemList = new (ELeave) CDesC16ArrayFlat(1);
         //formating the string 
//        setting the ItenTextArray property...


	iContactListBox->Model()->SetItemTextArray(itemList);
	iContactListBox->Model()->SetOwnershipType(ELbmOwnsItemArray);

So is it that there is no need to do the same...
directly i can get the pointer

CDesCArray* array = static_cast<CDesCArray*> (iListBox->Model()->ItemTextArray());

and keep appending to array...
no need to allocate memory CDesC16Array *itemList ?

Thanks for you reply...

void CSampleContainer::FillListBoxL()
{
    CDesCArray* array = static_cast<CDesCArray*> (iListBox->Model()->ItemTextArray());
    _LIT(KFormat, "\tItem\t%d");
    TBuf<30> string;
	
    for (int i=1; i<11; i++) {
        string.Format(KFormat, i*100);
        array->AppendL(string);
	}
    iListBox->HandleItemAdditionL();

}

Where CSampeContainer is a CCoeControl, and iListBox is a CAknDoubleStyleListBox.

[sohilr]

hi ,
i tried implemeting the below suggested method..
however its giving me following error

EIKCTL 25
that is

Index out of range in CColumnListBoxData


has anyone come across this error ?

[sohilr]

hi i solved the below problem ..
what mistake i was making was using different class of listbox and having different format string..

[vis_siv]

hi
i have implemented the code given this thread, its wroking fine in the emulator but when i am opening the application in mobile it gets closed , can anyone tell me what is wrong .

thx
vis

[parag_purkar]

check the error code :

See http://www.newlc.com/Symbian-OS-Error-Codes.html

Regards,
Parag Purkar

[vis_siv]

parag I am not getting any errors the application just closes down when trying to open.

vis

[parag_purkar]

hi
i have implemented the code given this thread, its wroking fine in the emulator but when i am opening the application in mobile it gets closed , can anyone tell me what is wrong .

thx
vis

It is working on emulator


did u checked ur resources ..check ur images any another resource...check ur .pkg file details .. specially .rsg ,.mif,_reg.rsc are properly mensioned and as they are present on the same location

which device ur using ?