numericeditorcontainer.cpp

series60 应用程序开发的源代码 series60 应用程序开发的源代码

/**
* 
* @brief Definition of CNumericEditorContainer
*
* Copyright (c) EMCC Software Ltd 2003
* @version 1.0
*/

// INCLUDE FILES

// Class include
#include "NumericEditorContainer.h"

// System includes
#include <aknlists.h> // CAknSingleHeadingStyleListBox
#include <barsread.h> // TResourceReader
#include <NumericEditor.rsg> //R_NUMERICEDITOR_FORM, R_NUMERICEDITOR_EMPLOYEES_LISTBOX


// User includes
#include "NumericEditorForm.h"


// CONSTANTS

// N.B. #define'd as DLL cannot contain writeable static data
#define KListPosition TPoint(0,0) 


// ================= MEMBER FUNCTIONS =======================

/**
* Symbian OS 2nd phase constructor.  Creates a Window for the controls, which it contains.
* Constructs a list and adds it to the window, which it then activates.
* @param aRect The rectangle for this window
*/        
void CNumericEditorContainer::ConstructL(const TRect& aRect)
{
    CreateWindowL();
    
    iEmployeesList = new (ELeave) CAknSingleHeadingStyleListBox;
    iEmployeesList->SetContainerWindowL(*this);
    
    // Second Phase Construction
    TResourceReader reader;
    CEikonEnv::Static()->CreateResourceReaderLC(reader, R_NUMERICEDITOR_EMPLOYEES_LISTBOX);
    iEmployeesList->ConstructFromResourceL(reader);
    CleanupStack::PopAndDestroy(); // reader
    
    iEmployeesList->CreateScrollBarFrameL(ETrue);
    iEmployeesList->ScrollBarFrame()->SetScrollBarVisibilityL(
        CEikScrollBarFrame::EOff, CEikScrollBarFrame::EAuto);
    
    SetRect(aRect);
    ActivateL();
}

/**
* Symbian OS 2 phase constructor.
* Constructs the CNumericEditorContainer using the NewLC method, popping
* the constructed object from the CleanupStack before returning it.
* 
* @param aRect The rectangle for this window
* @return The newly constructed CNumericEditorContainer
*/
CNumericEditorContainer* CNumericEditorContainer::NewL(const TRect& aRect)
{
    CNumericEditorContainer* self = CNumericEditorContainer::NewLC(aRect);
    CleanupStack::Pop(self);
    return self;
}

/**
* Symbian OS 2 phase constructor.
* Constructs the CNumericEditorContainer using the constructor and ConstructL 
* method, leaving the constructed object on the CleanupStack before returning it.
* 
* @param aRect The rectangle for this window
* @return The newly constructed CNumericEditorContainer
*/
CNumericEditorContainer* CNumericEditorContainer::NewLC(const TRect& aRect)
{
    CNumericEditorContainer* self = new (ELeave) CNumericEditorContainer;
    CleanupStack::PushL(self);
    self->ConstructL(aRect);
    return self;
}

/**
* Destructor. Frees up memory for the list and the array of employees.
*/
CNumericEditorContainer::~CNumericEditorContainer()
{
    delete iEmployeesList;
    iEmployees.Close();
}


/**
*    
* Called by framework when the view size is changed.  Resizes the
* iEmployeesList accordingly.
*
*/
void CNumericEditorContainer::SizeChanged()
{
    iEmployeesList->SetExtent (KListPosition, iEmployeesList->MinimumSize());
}

/**
* Called by the framework in compound controls    
* @return The number of controls in this CNumericEditorContainer
*/
TInt CNumericEditorContainer::CountComponentControls() const
{
    return 1; // return number of controls inside this container
}

/**
* Called by the framework in compound controls    
* @param The index of the control to return
* @return The control for aIndex
*/
CCoeControl* CNumericEditorContainer::ComponentControl(TInt aIndex) const
{
    switch (aIndex)
    {
        case 0:
            return iEmployeesList;
        default:
            return NULL;
    }
}

/**
* Called by the framework to draw this control.  Clears the area in 
* aRect.
* @param aRect in which to draw
*/
void CNumericEditorContainer::Draw(const TRect& aRect) const
{
    CWindowGc& gc = SystemGc();
    gc.Clear(aRect);
}

/**
* Called by the framework whenever a key event occurs.    
* Passes the key event to the employees list if it is not null, otherwise returns
* EKeyWasNotConsumed
* @param aKeyEvent the Key event which occured, e.g. select key pressed
* @param aType the type of Key event which occurred, e.g. key up, key down
* @return TKeyResponse EKeyWasNotConsumed if the key was not processed, EKeyWasConsumed if it was
*/
TKeyResponse CNumericEditorContainer::OfferKeyEventL(const TKeyEvent& aKeyEvent,TEventCode aType)
{
    if (iEmployeesList)
        return iEmployeesList->OfferKeyEventL (aKeyEvent, aType);
    else
        return EKeyWasNotConsumed;
}


/**
* Invokes the form in editable state, with a new opponenet, so that the details can be entered.
* Adds the Employee to the array of iEmployees and the list
*/
void CNumericEditorContainer::NewEmployeeL()
{
    TNumericEditorEmployee Employee;
    TBool saveState = EFalse;
    CNumericEditorForm* form = CNumericEditorForm::NewL(Employee, saveState);
    form->ExecuteLD(R_NUMERICEDITOR_FORM_DIALOG);
    if (saveState)
    {
        AddEmployeeToListL(Employee);
    }
    else
    {
        iEmployeesList->DrawNow();
    }
}

/**
* Invokes the form in the view state, with the currently selected Employee so that the details 
* can be viewed and edited.
* Updates the Employee in the array of iEmployees and the list
*/
void CNumericEditorContainer::OpenEmployeeL()
{
    TNumericEditorEmployee& Employee = iEmployees[iEmployeesList->CurrentItemIndex()];
    TBool saveState = EFalse;
    CNumericEditorForm* form = CNumericEditorForm::NewL(Employee, saveState);
    form->ExecuteLD(R_NUMERICEDITOR_FORM_DIALOG);
    if (saveState)
    {
        UpdateEmployeeInListL (Employee);
    }
    else
    {
        iEmployeesList->DrawNow();
    }
}



/**
* If the Employee is valid, adds it to the array of iEmployees and updates the list
* of employees
* @param aEmployee reference to the Employee which should be added
*/
void CNumericEditorContainer::AddEmployeeToListL (const TNumericEditorEmployee& aEmployee)
{
        iEmployees.Append(aEmployee);
        
        CTextListBoxModel* model = iEmployeesList->Model();  // not taking ownership
        model->SetOwnershipType (ELbmOwnsItemArray);
        CDesCArray* itemArray = STATIC_CAST(CDesCArray*, model->ItemTextArray());
        itemArray->AppendL (ListStringFromEmployeeL(aEmployee));
        iEmployeesList->HandleItemAdditionL();
    
}

/**
* Extracts the information from aEmployee, for display in the list.
* @param aEmployee the Employee to get the information from
*/
TBuf<50> CNumericEditorContainer::ListStringFromEmployeeL (const TNumericEditorEmployee& aEmployee) const
{
    TBuf<50> string; 
    _LIT (KStringHeader, "%d\t%S");
    HBufC* name = aEmployee.Name().AllocLC();        
    string.Format(KStringHeader(), aEmployee.Age(),name);
    CleanupStack::PopAndDestroy(name);
    return string;
}


/**
* Updates the Employee in the array of iEmployees and updates the list
* of employees
* @param aEmployee reference to the employee which should be updated
*/
void CNumericEditorContainer::UpdateEmployeeInListL (TNumericEditorEmployee& aEmployee)
{
    CTextListBoxModel* model = iEmployeesList->Model();  // not taking ownership
    model->SetOwnershipType (ELbmOwnsItemArray);
    CDesCArray* itemArray = STATIC_CAST(CDesCArray*, model->ItemTextArray());
    
    TInt index = iEmployeesList->CurrentItemIndex();
    TPtrC item = (*itemArray)[index];
    item.Set (ListStringFromEmployeeL(aEmployee));
    
    itemArray->Delete(index);
    itemArray->InsertL(index, item);
    iEmployeesList->DrawNow();
}

/**
* Deletes the currently selected Employee in the array of iEmployees and updates the list of employees
*/
void CNumericEditorContainer::DeleteEmployeeL()
{
    
    CTextListBoxModel* model = iEmployeesList->Model();  // not taking ownership
    model->SetOwnershipType (ELbmOwnsItemArray);
    CDesCArray* itemArray = STATIC_CAST(CDesCArray*, model->ItemTextArray());
    
    TInt index = iEmployeesList->CurrentItemIndex();
    
    iEmployees.Remove(index);
    itemArray->Delete(index);
    iEmployeesList->SetCurrentItemIndex(iEmployeesList->TopItemIndex());
    iEmployeesList->DrawNow();
}

/**
* Returns the number of employees currently in the list
*/
TInt CNumericEditorContainer::NumberOfEmployees()
{
    TInt numberOfEmployees = 0;
    
    if (iEmployeesList)
        numberOfEmployees = iEmployees.Count();
    
    return numberOfEmployees;
}



// End of File