List box: single selection don't work

[koreson]

Hi,

this code creates an multi selection list box. WHY ?

void CtestAppView::ConstructL( const TRect& aRect )
{
// Create a window for this application view
CreateWindowL();
iListBox = new (ELeave) CAknSingleNumberStyleListBox;
iListBox->ConstructL( this, EAknListBoxSelectionList);
iListBox->SetContainerWindowL(*this);
SetRect(aRect);
iListBox->CreateScrollBarFrameL(ETrue);
iListBox->ScrollBarFrame()->SetScrollBarVisibilityL(CEikScrollBarFrame::EOff, CEikScrollBarFrame::EAuto);
MDesCArray* itemList = iListBox->Model()->ItemTextArray();
CDesCArray* itemArray = (CDesCArray*) itemList;
itemArray->AppendL(_L(" aaa"));
itemArray->AppendL(_L(" bbb"));
itemArray->AppendL(_L(" ccc"));
itemArray->AppendL(_L(" ddd"));
itemArray->AppendL(_L(" aaa"));
iListBox->HandleItemAdditionL();
iListBox->SetRect(aRect.Size());
ActivateL();
}


While scrolling all items stay selected.
New items at the bottom of the list draw its text over the existing items
in the visible area of the list box.
This error appears in all list box types.
Whats wrong ???




best regards

[vasant21]

hi,

Why you call ListBox->HandleItemAdditionL(); while creating your listbox.

You can do it like this :
iItemList = new (ELeave) CAknSingleStyleListBox();

iItemList->SetContainerWindowL(*this);
iItemList->SetMopParent(this);
//EAknListBoxSelectionList();
//iItemList->ConstructFromResourceL(R_ENTRY_SETTINGS_LIST);
iItemList->ConstructL(this,EAknListBoxSelectionList);

array = new (ELeave) CDesCArrayFlat(25);
array->AppendL(_L("\tItem 1"));
array->AppendL(_L("\tItem 2"));
array->AppendL(_L("\tItem 3"));
array->AppendL(_L("\tItem 4"));
iItemList->Model()->SetItemTextArray(array);

iItemList->MakeVisible(true);
iItemList->SetRect(aRect);
iItemList->ActivateL();

iItemList->DrawNow();


Regards,
vasant

[koreson]

@vasant21:
thank you for reply.

I do it in you way - its the same problem.
The first item is selected at start. I scroll down all items stay selected. I want a classic list style where only one item is selected.
Another strange behavior is that the items text "overdraw" each other while scrolling.

Here is an error anywhere. I post the rest of the code now.
I made a new HelloWorld application with Carbide .vs / S60 3rd ed. the list is the only ui element.
It would make me happy we could solve this basic problem.


void CtestAppView::ConstructL( const TRect& aRect )
{
// Create a window for this application view
CreateWindowL();

iListBox = new (ELeave) CAknSingleStyleListBox();

iListBox->SetContainerWindowL(*this);
iListBox->SetMopParent(this);
iListBox->ConstructL(this,EAknListBoxSelectionList);

iAppList = new (ELeave) CDesCArrayFlat(25);
iAppList->AppendL(_L("\tItem 1"));
iAppList->AppendL(_L("\tItem 2"));
iAppList->AppendL(_L("\tItem 3"));
iAppList->AppendL(_L("\tItem 4"));
iAppList->AppendL(_L("\tItem 1"));
iAppList->AppendL(_L("\tItem 2"));
iAppList->AppendL(_L("\tItem 3"));
iAppList->AppendL(_L("\tItem 4"));
iAppList->AppendL(_L("\tItem 1"));
iAppList->AppendL(_L("\tItem 2"));
iAppList->AppendL(_L("\tItem 3"));
iAppList->AppendL(_L("\tItem 4"));
iListBox->Model()->SetItemTextArray(iAppList);

iListBox->MakeVisible(true);
iListBox->SetRect(aRect);
iListBox->ActivateL();

iListBox->DrawNow();

ActivateL();
}


CtestAppView::~CtestAppView()
{
delete iListBox;
iListBox = NULL;
}


void CtestAppView::HandleControlEventL(CCoeControl* /*control*/, TCoeEvent /*eventType*/)
{
}


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


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


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



void CtestAppView::Draw( const TRect& /*aRect*/ ) const
{
}


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


//AppUI

void CtestAppUi::ConstructL()
{
// Initialise app UI with standard value.
BaseConstructL();

// Create view object
iAppView = CtestAppView::NewL( ClientRect() );
iAppView->SetMopParent(this);

iAppView->SetRect(ClientRect());
AddToStackL(iAppView);
}

best regards
Daniel

[wizard_hu_]

You have not mentioned that you are using 3rd edition, but I know ;-)
So: use BaseConstructL(EAknEnableSkin) in the ConstructL of your AppUi.

[koreson]

@wizard_hu_

thank you. This solved my problem.

But why the project wizard doesnt set this flag for me !?!?

Developing for Symbian is time robbery !


best regards
Daniel