I create a LISTBOX control in container, but listbox does not appear!

I write code in my "CTestAppView"(inherit from "CCoeControl") ConstructL() funtion:

[CODE] // Create a window for this application view
CreateWindowL();

iListBox = new ( ELeave ) CAknSingleStyleListBox;
iListBox->SetContainerWindowL( *this );
{
TResourceReader reader;
iEikonEnv->CreateResourceReaderLC( reader, R_MY_LIST_BOX );
iListBox->ConstructFromResourceL( reader );
CleanupStack::PopAndDestroy(); // reader internal state
}
// the listbox owns the items in the list and will free them
iListBox->Model()->SetOwnershipType( ELbmOwnsItemArray );

iListBox->SetFocus( ETrue );

// Set the windows size
SetRect(aRect);

// Activate the window, which makes it ready to be drawn
ActivateL();[/CODE]

Run this program, the UI is blank white, the listbox created but I can't see it.....

Hi Aluzi,

Have you implemented
CountComponentControls() and ComponentControl(TInt aIndex) methods in your container class?

Regards,
Kavit.

Hi please go througth below link,
[U][url]http://wiki.forum.nokia.com/index.php/Listbox_creation_using_resource[/url][/U]

Hi,

Have you implemented virtual functions deriving from CCoeControl SizeChanged(),CountComponentControls() and ComponentControl() properly? Just check the listbox related documents in SDK doc. And lot of examples in forum nokia related to listbox, just go through it.

Regards,
Eswar

Hi,
pls go through the following link..
[url]http://wiki.forum.nokia.com/index.php/Listbox_creation_using_resource[/url]

By,
Chandra.

[QUOTE=aluzi;402272]I write code in my "CTestAppView"(inherit from "CCoeControl") ConstructL() funtion:

[CODE] // Create a window for this application view
CreateWindowL();

iListBox = new ( ELeave ) CAknSingleStyleListBox;
iListBox->SetContainerWindowL( *this );
{
TResourceReader reader;
iEikonEnv->CreateResourceReaderLC( reader, R_MY_LIST_BOX );
iListBox->ConstructFromResourceL( reader );
CleanupStack::PopAndDestroy(); // reader internal state
}
// the listbox owns the items in the list and will free them
iListBox->Model()->SetOwnershipType( ELbmOwnsItemArray );

iListBox->SetFocus( ETrue );

// Set the windows size
SetRect(aRect);

// Activate the window, which makes it ready to be drawn
ActivateL();[/CODE]

Run this program, the UI is blank white, the listbox created but I can't see it.....[/QUOTE]


Hi use this in SizeChanged()
{
iListBox->SetExtent(TPoint(0,0), iListBox->MinimumSize() );
}

May be helpfull for u.

regards
Md.kashif

Hi ,
if you are using SetExtent

[HTML]
iListBox = new(ELeave) CAknSingleNumberStyleListBox();
iListBox->ConstructL(this);
iListBox->SetContainerWindowL(*this);
const TPoint aPoint(0,0);
const TSize aSize(180,160);
iListBox->SetExtent(aPoint,aSize);
[/HTML]

Regards,
Parag Purkar

[QUOTE=parag_purkar;402896]Hi ,
1)Check for Item format of list box.
e.g
[HTML] _LIT(KListItemFormat,"%d\t%s\t\t");[/HTML]

2)if you are using SetExtent

[HTML]
iListBox = new(ELeave) CAknSingleNumberStyleListBox();
iListBox->ConstructL(this);
iListBox->SetContainerWindowL(*this);
const TPoint aPoint(0,0);
const TSize aSize(180,160);
iListBox->SetExtent(aPoint,aSize);
[/HTML]


Regards,
Parag Purkar[/QUOTE]


hi Parag when in this thread use only CAknSingleStyleListBox, why u told format of CAknSingleNumberStyleListBox().Here no need for this format
_LIT(KListItemFormat,"%d\t%s\t\t");

Regards
Md.kashif

Yes Kashif you are correct I made correction in my post