a error about listbox and a findbox

[billqu]

hi
I coding for a listbox and afindbox.
But a error launch when my program exit.
I debug my program, I find that do the code below, the error should launch.
// Destructor
CLookupContainer::~CLookupContainer()
{

if(iEngine)
{
delete iEngine;
}

if(iFindBox)
delete iFindBox;

if(iListBox)
delete iListBox; // the error launch when step this line.


if(iCnvCharacterSetConverter)
{
delete iCnvCharacterSetConverter;
}

}

My codes about the main program below:
Please see them,
and give me some suggestion.

Thank you very much.

in the .h file
I define the two object.

private: //data

CEikTextListBox * iListBox;

CAknSearchField* iFindBox;

in the .cpp file,
the main codes about the program below;
please see them.

void CLookupContainer::ConstructL(const TRect& aRect)
{
iCnvCharacterSetConverter = CCnvCharacterSetConverter::NewL();
//CCnvCharacterSetConverter::TAvailability avail = CCnvCharacterSetConverter::EAvailable;

CreateWindowL();

if ( iListBox )
{
delete iListBox;
iListBox = NULL;
}
//iListBox = new( ELeave ) CAknSingleStyleListBox ();
iListBox = new( ELeave ) CAknDoubleStyleListBox();

iEngine = CExporterEngine::NewL(CEikonEnv::Static()->FsSession());
iEngine->GetMessagesL(iCallBack);


CAknSearchField::TSearchFieldStyle style(CAknSearchField::EFixed);
//style = CAknSearchField::EFixed;EPopup

if ( iListBox )
{
// Constructs listbox.
iListBox->ConstructL( this, 0 );

iListBox->Model()->SetItemTextArray( iEngine->iTextArray );
iListBox->Model()->SetOwnershipType( ELbmDoesNotOwnItemArray );

}

iFindBox = CreateFindBoxL(iListBox, iListBox->Model(), style);

if ( iFindBox)
{

iFindBox->MakeVisible( ETrue );

}

SetRect(aRect);
SizeChanged();


ActivateL();
}

// Destructor
CLookupContainer::~CLookupContainer()
{

if(iEngine)
{
delete iEngine;
}

if(iFindBox)
delete iFindBox;

if(iListBox)
delete iListBox;





if(iCnvCharacterSetConverter)
{
delete iCnvCharacterSetConverter;
}

}



// ---------------------------------------------------------
// CLookupContainer::SizeChanged()
// Called by framework when the view size is changed
// ---------------------------------------------------------
//
void CLookupContainer::SizeChanged()
{

if ( iListBox )
{
if ( iFindBox )
{
SizeChangedForFindBox(); // Sets rectangle of listbox with findbox.
}
else
{
iListBox->SetRect( Rect() ); // Sets rectangle of listbox.
}
}
}
// ---------------------------------------------------------
// CLookupContainer::CountComponentControls() const
// ---------------------------------------------------------
//
TInt CLookupContainer::CountComponentControls() const
{
return 2; // return nbr of controls inside this container
}

// ---------------------------------------------------------
// CLookupContainer::ComponentControl(TInt aIndex) const
// ---------------------------------------------------------
//
CCoeControl* CLookupContainer::ComponentControl(TInt aIndex) const
{
switch ( aIndex )
{
case 0:
return iListBox;
case 1:
return iFindBox;
default:
return NULL;
}
}

// ---------------------------------------------------------
// CLookupContainer:raw(const TRect& aRect) const
// ---------------------------------------------------------
//
void CLookupContainer:raw(const TRect& aRect) const
{
CWindowGc& gc = SystemGc();
gc.SetPenStyle(CGraphicsContext::ENullPen);
gc.SetBrushColor(KRgbWhite);
gc.SetBrushStyle(CGraphicsContext::ESolidBrush);
gc.DrawRect(aRect);

}

// ---------------------------------------------------------
// CLookupContainer::HandleControlEventL(
// CCoeControl* aControl,TCoeEvent aEventType)
// ---------------------------------------------------------
//
void CLookupContainer::HandleControlEventL(
CCoeControl* /*aControl*/,TCoeEvent /*aEventType*/)
{
// TODO: Add your control event handler code here
}

TKeyResponse CLookupContainer::OfferKeyEventL(
const TKeyEvent& aKeyEvent,
TEventCode aType )
{
if ( aType != EEventKey ) // Is not key event?
{
return EKeyWasNotConsumed;
}


if ( iListBox )
{
if ( iFindBox )
{
TBool needRefresh( EFalse );
TBool flagsOfPopup( EFalse );


// Offers the key event to find box.


if ( AknFind::HandleFindOfferKeyEventL( aKeyEvent, aType, this,
iListBox, iFindBox,
flagsOfPopup,
needRefresh ) ==
EKeyWasConsumed )
{

if ( needRefresh )
{
iListBox->SetCurrentItemIndex(0);
iListBox->HandleItemAdditionL();
SizeChanged();
DrawNow();
}
return EKeyWasConsumed;
}

}

return iListBox->OfferKeyEventL( aKeyEvent, aType );
}
else
{
return EKeyWasNotConsumed;
}

}

// ----------------------------------------------------------------------------
// CAknExListColumnContainer::SizeChangedForFindBox()
// Called by framework when the view size is changed for creating listbox with
// findbox.
// ----------------------------------------------------------------------------
//
void CLookupContainer::SizeChangedForFindBox()
{
if ( iListBox && iFindBox )
{

TInt findWindowResourceId( R_AVKON_FIND_PANE );
TInt listAreaResourceId( R_AVKON_LIST_GEN_PANE_X );
TInt findWindowParentId( R_AVKON_MAIN_PANE_PARENT_NONE );
TBool flagsOfPopup( EFalse ); // Flag for find popup.


/*
TInt findWindowResourceId( R_AVKON_POPUP_FIND_WINDOW_COVER );
TInt listAreaResourceId( R_AVKON_LIST_GEN_PANE ); //R_AVKON_LIST_GEN_PANE
TInt findWindowParentId( R_AVKON_MAIN_PANE_PARENT_NONE );
TBool flagsOfPopup( EFalse ); // Flag for find popup.
*/


AknFind::HandleFindSizeChanged(
this, iListBox, iFindBox, flagsOfPopup, findWindowResourceId,
listAreaResourceId, R_AVKON_LIST_GEN_PANE_WITH_FIND_POPUP,
findWindowParentId );

//AknFind::HandleFindSizeChanged(this, iListBox, iFindBox);
}
}


CAknSearchField* CLookupContainer::CreateFindBoxL(
CEikListBox* aListBox,
CTextListBoxModel* aModel,
CAknSearchField::TSearchFieldStyle aStyle )
{
CAknSearchField* findbox = NULL;

if ( aListBox && aModel )
{
// Gets pointer of CAknFilteredTextListBoxModel. CTextListBoxModel
model = STATIC_CAST( CAknFilteredTextListBoxModel*, aModel );
// Creates FindBox.
findbox = CAknSearchField::NewL( *this,
aStyle,
NULL,
20 );
CleanupStack::PushL(findbox);
// Creates CAknListBoxFilterItems class.
model->CreateFilterL( aListBox, findbox );
//Filter can get by model->Filter();
CleanupStack::Pop(findbox); // findbox
}

return findbox;
}

[billqu]

I have search the sdk help the function HandleFindSizeChanged,
it donot explain the function's arg.
just like
flagsOfPopup, findWindowResourceId,
listAreaResourceId, R_AVKON_LIST_GEN_PANE_WITH_FIND_POPUP,
findWindowParentId
Please tell me what to do about the codes below:
AknFind::HandleFindSizeChanged(
this, iListBox, iFindBox, flagsOfPopup, findWindowResourceId,
listAreaResourceId, R_AVKON_LIST_GEN_PANE_WITH_FIND_POPUP,
findWindowParentId );

[billqu]

did everyone know it ?

[mateen_maldar]

hi,

try this

void CMyContainer::SizeChangedForFindBox()
{
if ( iListBox && iFindBox )
{

TInt findWindowResourceId( R_AVKON_POPUP_FIND_WINDOW );
TInt listAreaResourceId( R_AVKON_LIST_GEN_PANE );
TInt findWindowParentId( R_AVKON_MAIN_PANE_WITH_STATUS_PANE );

AknFind::HandleFindSizeChanged(
this, iListBox, iFindBox, ETrue, findWindowResourceId,
listAreaResourceId, R_AVKON_LIST_GEN_PANE_WITH_FIND_POPUP,
findWindowParentId );


}
}


Regards,

Mateen Maldar

[billqu]

Dear Mateen Maldar
Thank you very much.
I test your codes, the error is not launched when delete ifindbox in ~CLookupContainer().
But the ifindbox can not show at the CLookupContainer.

Why it is not shown?

Maybe change some other arg,

Please tell me,


Thank you very much.

your bill qu

[mateen_maldar]

hi,

May i know in which paltform of symbian ur working in? and plz detail me exactly wht is happening in ur code.. i Didn't got much info from ur post..

Regards,
Mateen Maldar

[billqu]

dear Mateen Maldar
There are the .h file's codes as below


#ifndef LOOKUPCONTAINER_H
#define LOOKUPCONTAINER_H

// INCLUDES
#include <coecntrl.h>
#include <eiktxlbx.h>
#include <eiklbi.h>
#include <eiklbv.h>
#include <eiktxlbm.h>
#include <eiktxlbx.h>
#include <aknsfld.h>
#include <aknutils.h>
#include <aknlists.h>
#include <badesca.h>
#include <cntdb.h>
#include <cntfield.h>
#include <cntitem.h>
#include <cntfldst.h>


#include <akntabgrp.h>

#include <charconv.h> // charconv.lib

#include "exporter.h"

//#include <aknexlist.rsg>
//#include <aknexlist.mbg>

// CLASS DECLARATION

/**
* CLookupContainer container control class.
*
*/
class CLookupContainer : public CCoeControl, MCoeControlObserver
{
public: // Constructors and destructor

/**
* EPOC default constructor.
* @param aRect Frame rectangle for container.
*/
void ConstructL(const TRect& aRect);


TKeyResponse OfferKeyEventL(
const TKeyEvent& aKeyEvent,
TEventCode aType );

/**
* Destructor.
*/
~CLookupContainer();

public: // New functions

public: // Functions from base classes
TPtrC GetCurItem();
CAknFilteredTextListBoxModel* model;
private: // Functions from base classes

CAknSearchField* CreateFindBoxL(CEikListBox* aListBox,CTextListBoxModel* aModel,CAknSearchField::TSearchFieldStyle aStyle );

/**
* From CoeControl,SizeChanged.
*/
void SizeChanged();
void SizeChangedForFindBox();

/**
* From CoeControl,CountComponentControls.
*/
TInt CountComponentControls() const;

/**
* From CCoeControl,ComponentControl.
*/
CCoeControl* ComponentControl(TInt aIndex) const;

/**
* From CCoeControl,Draw.
*/
void Draw(const TRect& aRect) const;

/**
* From ?base_class ?member_description
*/
// event handling section
// e.g Listbox events
void HandleControlEventL(CCoeControl* aControl,TCoeEvent aEventType);


private: //data

CEikTextListBox * iListBox;
//CEikListBox CEikTextListBox CEikFormattedCellListBox

CAknSearchField* iFindBox;

CExporterEngine* iEngine;

TCallBack iCallBack;

// for encoding the text file
CCnvCharacterSetConverter* iCnvCharacterSetConverter;

};

#endif

// End of File

[billqu]

There are the .cpp codes as below:

// INCLUDE FILES
#include "LookupContainer.h"
#include <eiklabel.h> // for example label control
#include <f32file.h>
#include <s32file.h>
#include <libc\sys\unistd.h>
#include <charconv.h>

CAknSearchField* CLookupContainer::CreateFindBoxL(
CEikListBox* aListBox,
CTextListBoxModel* aModel,
CAknSearchField::TSearchFieldStyle aStyle )
{
CAknSearchField* findbox = NULL;

if ( aListBox && aModel )
{
// Gets pointer of CAknFilteredTextListBoxModel. CTextListBoxModel
model = STATIC_CAST( CAknFilteredTextListBoxModel*, aModel );
// Creates FindBox.
findbox = CAknSearchField::NewL( *this,
aStyle,
NULL,
20 );
CleanupStack::PushL(findbox);
// Creates CAknListBoxFilterItems class.
model->CreateFilterL( aListBox, findbox );
//Filter can get by model->Filter();
CleanupStack::Pop(findbox); // findbox
}

return findbox;
}


TPtrC CLookupContainer::GetCurItem()
{

CAknListBoxFilterItems *pFilterItems = model->Filter();

TInt tiTureCurIndex;
TInt tiCurIndex;
tiCurIndex = iListBox->CurrentItemIndex();
tiTureCurIndex = pFilterItems->FilteredItemIndex(tiCurIndex);


CTextListBoxModel* pModel = iListBox->Model();



CDesCArrayFlat *pText = (CDesCArrayFlat*)pModel->ItemTextArray();
TInt nCurSel = iListBox->CurrentItemIndex();
if(nCurSel != -1)
{
TPtrC aContent = pText->MdcaPoint(tiTureCurIndex);
return aContent;
}
else
{
_LIT(KText1,"No data ");
TPtrC aContent1(KText1);
return aContent1;
}

}

void CLookupContainer::ConstructL(const TRect& aRect)
{
iCnvCharacterSetConverter = CCnvCharacterSetConverter::NewL();
//CCnvCharacterSetConverter::TAvailability avail = CCnvCharacterSetConverter::EAvailable;

CreateWindowL();

if ( iListBox )
{
delete iListBox;
iListBox = NULL;
}
//iListBox = new( ELeave ) CAknSingleStyleListBox ();
iListBox = new( ELeave ) CAknDoubleStyleListBox();

iEngine = CExporterEngine::NewL(CEikonEnv::Static()->FsSession());
iEngine->GetMessagesL(iCallBack);


CAknSearchField::TSearchFieldStyle style(CAknSearchField::ESearch);
//style = CAknSearchField::EFixed;EPopup ESearch

if ( iListBox )
{
// Constructs listbox.
iListBox->ConstructL( this, 0 );

iListBox->Model()->SetItemTextArray( iEngine->iTextArray );
iListBox->Model()->SetOwnershipType( ELbmDoesNotOwnItemArray );

}

iFindBox = CreateFindBoxL(iListBox, iListBox->Model(), style);

if ( iFindBox)
{

iFindBox->MakeVisible( ETrue );

}

SetRect(aRect);
SizeChanged();


ActivateL();
}

// Destructor
CLookupContainer::~CLookupContainer()
{

if(iEngine)
{
delete iEngine;
}

if(iFindBox)
delete iFindBox;

if(iListBox)
delete iListBox;

if(iCnvCharacterSetConverter)
{
delete iCnvCharacterSetConverter;
}

}

// ---------------------------------------------------------
// CLookupContainer::SizeChanged()
// Called by framework when the view size is changed
// ---------------------------------------------------------
//
void CLookupContainer::SizeChanged()
{

if ( iListBox )
{
if ( iFindBox )
{
SizeChangedForFindBox(); // Sets rectangle of listbox with findbox.
}
else
{
iListBox->SetRect( Rect() ); // Sets rectangle of listbox.
}
}
}
// ---------------------------------------------------------
// CLookupContainer::CountComponentControls() const
// ---------------------------------------------------------
//
TInt CLookupContainer::CountComponentControls() const
{
return 2; // return nbr of controls inside this container
}

// ---------------------------------------------------------
// CLookupContainer::ComponentControl(TInt aIndex) const
// ---------------------------------------------------------
//
CCoeControl* CLookupContainer::ComponentControl(TInt aIndex) const
{
switch ( aIndex )
{
case 0:
return iListBox;
case 1:
return iFindBox;
default:
return NULL;
}
}

void CLookupContainer:raw(const TRect& aRect) const
{
CWindowGc& gc = SystemGc();
gc.SetPenStyle(CGraphicsContext::ENullPen);
gc.SetBrushColor(KRgbWhite);
gc.SetBrushStyle(CGraphicsContext::ESolidBrush);
gc.DrawRect(aRect);

}

void CLookupContainer::HandleControlEventL(
CCoeControl* /*aControl*/,TCoeEvent /*aEventType*/)
{
// TODO: Add your control event handler code here
}



TKeyResponse CLookupContainer::OfferKeyEventL(
const TKeyEvent& aKeyEvent,
TEventCode aType )
{
if ( aType != EEventKey ) // Is not key event?
{
return EKeyWasNotConsumed;
}
if ( iListBox )
{
if ( iFindBox )
{
TBool needRefresh( EFalse );
TBool flagsOfPopup( EFalse );


// Offers the key event to find box.


if ( AknFind::HandleFindOfferKeyEventL( aKeyEvent, aType, this,
iListBox, iFindBox,
flagsOfPopup,
needRefresh ) ==
EKeyWasConsumed )
{

if ( needRefresh )
{
iListBox->SetCurrentItemIndex(0);
iListBox->HandleItemAdditionL();
SizeChanged();
DrawNow();
}
return EKeyWasConsumed;
}

}

return iListBox->OfferKeyEventL( aKeyEvent, aType );
}
else
{
return EKeyWasNotConsumed;
}

}

// ----------------------------------------------------------------------------
// CAknExListColumnContainer::SizeChangedForFindBox()
// Called by framework when the view size is changed for creating listbox with
// findbox.
// ----------------------------------------------------------------------------
//
void CLookupContainer::SizeChangedForFindBox()
{
if ( iListBox && iFindBox )
{
TInt findWindowResourceId( R_AVKON_POPUP_FIND_WINDOW );
TInt listAreaResourceId( R_AVKON_LIST_GEN_PANE );
TInt findWindowParentId( R_AVKON_MAIN_PANE_WITH_STATUS_PANE );


AknFind::HandleFindSizeChanged(
this, iListBox, iFindBox, ETrue, findWindowResourceId,
listAreaResourceId, R_AVKON_LIST_GEN_PANE_WITH_FIND_POPUP,
findWindowParentId );

}
}

// End of File

[billqu]

if I change the CLookupContainer::SizeChangedForFindBox()
change AknFind::HandleFindSizeChanged's arg
ETrue to EFalse
the codes as below:
void CLookupContainer::SizeChangedForFindBox()
{
if ( iListBox && iFindBox )
{
TInt findWindowResourceId( R_AVKON_POPUP_FIND_WINDOW );
TInt listAreaResourceId( R_AVKON_LIST_GEN_PANE );
TInt findWindowParentId( R_AVKON_MAIN_PANE_WITH_STATUS_PANE );


AknFind::HandleFindSizeChanged(
this, iListBox, iFindBox, EFalse, findWindowResourceId,
listAreaResourceId, R_AVKON_LIST_GEN_PANE_WITH_FIND_POPUP,
findWindowParentId );

}
}



The ifindbox can be shown,

but the error launch at delete ifindbox at ::~CLookupContainer()

why?

Please tell me.

Thank you very much.

!!!

[billqu]

my sdk is s60 2nd edition sdk fp2.

[mateen_maldar]

hi,

try this in ur ConstructL

CAknSearchField::TSearchFieldStyle style(CAknSearchField::ESearch );
style = CAknSearchField::EPopup;

Regards,
Mateen Maldar

[billqu]

hi mateen
if style = CAknSearchField::EPopup;
the program can not error when disconstructl.
But the ifindbox is number only when I click key,
I hope the ifindbox is text, not only number.
How to change it?

Thank you very much.

[billqu]

I have seen a sample at symbian website, which name is lookup.
http://www.symbian.com/developer/tec...ps/lookup.html
The Lookup application populates a CEikFormattedCellListBox that displays the entries matching the telephone number entered by the user.
I hope my listbox can matching text, not only number.
So I change CEikFormattedCellListBox to CEikTextListBox
and change CAknSearchField::EPopup to ESearch.

But error which launch I have said.

How should I change the lookup program for listbox can enter text?

Thank you very much.

[mateen_maldar]

hi,

use
SetFocus(ETrue);

In the constructL for the findbox

which will take both alphabets and numeric.

sorry i'm in my native place for a week hoilday. sorry for the delay

regards,
Mateen Maldar

[billqu]

Dear mateen
Thank for your suggestion.
I will try it.
I am very exciting.
I feel that it can solve the problem.
Thank you very much.