Listbox creation

[vglaiju]

Can anyone let me know the procedure for creating a Simple text list box in UIQ2.1.source code is preferred..

[stenlik]

Hi,
it is very simple and additionally if it will be good programmed it could be used on both UIQ and Avkon ( and Crystal possible:). Remember that the UIQ additionally needs processing pointer events - but is is much nore simply than keyboard.

You must do 3 steps
a) provide model - means implement mixin MListBoxModel
b) programm drawer - derived from CListItemDrawer
c) program listbox class - derived from CEikListBox

It is really simply, I cannot put source code here, so look at least on this header file and implement all methods:



// ---------------------------------------------------------
// MODEL
// Encapsulates the data items for the listbox
// It just wraps access to the view's list of objects
// ---------------------------------------------------------
class CExampleListBoxModel: public MListBoxModel
{
public:

///
/// C++ constructor.
///
CExampleListBoxModel();

///
/// Destructor.
///
~CExampleListBoxModel();

///
/// 2nd stage constructor.
///
void ConstructL();

///
/// MListBoxModel - Gets the number of items in the list box.
///
TInt NumberOfItems() const;

///
/// MListBoxModel - Gets an array of strings used by the list box
///
const MDesCArray* MatchableTextArray() const;

///
/// MListBoxModel - Returns pointer to text item array from model
///
MDesCArray* ItemTextArray() const;

///
/// set new MListBoxModel
///
void SetItemTextArrayL( MDesCArray* aItems );
private:

///
/// Defined as pure virtual for future use - must have blank
/// implementation...
///
virtual TAny* Reserved_1() { return NULL; };

private:

/// text description storage
CDesCArray* iTexts;
};

// ---------------------------------------------------------
// DRAWER
// draws images in listbox
// ---------------------------------------------------------
class CExampleListBoxItemDrawer: public CListItemDrawer
{
public:
///
/// C++ constructor.
///
CExampleListBoxItemDrawer();

///
/// Destructor.
///
~CExampleListBoxItemDrawer();

///
/// 2nd stage constructor.
///
void ConstructL(const CEikListBox& aOwner);

///
/// CListItemDrawer Draws individual list box items.
///
void DrawActualItem(TInt aItemIndex, const TRect& aActualItemRect,
TBool aItemIsCurrent, TBool aViewIsEmphasized,
TBool aViewIsDimmed, TBool aItemIsSelected) const;
///
/// Returns pointer to icon array.
///
CArrayPtr<CGulIcon>* IconArray() const;

///
/// Set icons.
///
void SetIconArrayL(CArrayPtr<CGulIcon>* aIcons);

///
/// Set model.
///
void SetModel(CExampleListBoxModel* aModel);

private:

/// icons storage
CArrayPtr<CGulIcon>* iIcons;

/// text color
TRgb iTextColor;

/// highlight text color
TRgb iHighlightedTextColor;

/// highlight background
TRgb iHighligtedBackground;

/// model with texts to draw
CExampleListBoxModel* iModel;

/// small font
const CFont* iFont;

// owner
const CEikListBox* iOwner;
};

// ---------------------------------------------------------
// LISTBOX
// ---------------------------------------------------------
class CExampleListBox: public CEikListBox
{
public:

///
/// Epoc way...
///
static CExampleListBox* NewL(const CCoeControl& aParent);

///
/// Returns pointer to item drawer.
///
CExampleListBoxItemDrawer* ItemDrawer() const;

///
/// Returns pointer to model
///
CExampleListBoxModel* Model() const;

protected:

///
///
///
virtual void SizeChanged();

private:

///
/// object construction methods
///
CExampleListBox();

///
/// 2nd constructor.
///
void ConstructL(const CCoeControl& aParent);

private:

/// List box has a model (the data)
CExampleListBoxModel* iGraphicsListBoxModel;

/// Drawer that does the actual drawing of items.
CExampleListBoxItemDrawer* iGraphicsListItemDrawer;
};
Bye
STeN

[vglaiju]

Thank you for ur reply..
Ill try ur method and post my feedback