stackcontainer.cpp

Symbian s60 实现栈图形化功能

/*
* ============================================================================
*  Name     : CStackContainer from StackContainer.h
*  Part of  : Stack
*  Created  : 03.12.2005 by ToBeReplacedByAuthor
*  Implementation notes:
*     Initial content was generated by Series 60 AppWizard.
*  Version  :
*  Copyright: ToBeReplacedByCopyright
* ============================================================================
*/

// INCLUDE FILES
#include "StackContainer.h"
#include <eiklabel.h>  // for example label control
#include <eikedwin.h>  // for CEikEdwin
#include <Stack.rsg>
#include <barsread.h>
#include <aknlists.h>  // for Listbox  
//#include <Stack.rsg>
#include "stack.hrh"

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

// ---------------------------------------------------------
// CStackContainer::ConstructL(const TRect& aRect)
// EPOC two phased constructor
// ---------------------------------------------------------
//
void CStackContainer::ConstructL(const TRect& aRect)
    {
    CreateWindowL();

    iPushTextLabel = new (ELeave) CEikLabel;
    iPushTextLabel->SetContainerWindowL( *this );
    iPushTextLabel->SetTextL( _L("To Push") );

    iPopTextLabel = new (ELeave) CEikLabel;
    iPopTextLabel->SetContainerWindowL( *this );
    iPopTextLabel->SetTextL( _L("Poped") );
    
    iPopContentLabel = new (ELeave) CEikLabel;
    iPopContentLabel->SetContainerWindowL( *this );
    iPopContentLabel->SetTextL( _L("None") );
    
    TResourceReader reader;
    iCoeEnv->CreateResourceReaderLC(reader, R_AKNEXEDITOR_OPERATECONTAINER_EDWIN);
    iPushNumber = new (ELeave) CEikEdwin;
    iPushNumber->SetContainerWindowL(*this);
    iPushNumber->ConstructFromResourceL(reader);
    CleanupStack::PopAndDestroy();  // Resource reader
    iPushNumber->SetBorder(TGulBorder::ESingleBlack);
    iPushNumber->SetFocus(ETrue);
    
    iListBox = new (ELeave) CAknSingleStyleListBox;
    iListBox->SetContainerWindowL(*this);
    iListBox->ConstructL(this, EAknListBoxSelectionList);

    CDesCArrayFlat* array = new (ELeave) CDesCArrayFlat(5);
    CleanupStack::PushL(array);
    array->AppendL(_L("\tBottom of Stack"));
    CleanupStack::Pop();
    iListBox->Model()->SetItemTextArray(array);
    iListBox->Model()->SetOwnershipType(ELbmOwnsItemArray);
    
    iListBox->CreateScrollBarFrameL(ETrue);
    iListBox->ScrollBarFrame()->SetScrollBarVisibilityL(CEikScrollBarFrame::EOn, CEikScrollBarFrame::EAuto);
    iListBox->ActivateL();
    
    SetRect(aRect);
    ActivateL();
    }

// Destructor
CStackContainer::~CStackContainer()
    {
    delete iPushTextLabel;
    delete iPopTextLabel;
    delete iPopContentLabel;
    delete iPushNumber;
    delete iListBox;
    }

#define PUSH_LABEL_POS TPoint(5,5)
#define PUSH_EDIT_POS TPoint(88,5)
#define POP_LABEL_POS TPoint(5,35)
#define POP_CONTENT_POS TPoint(88,35)
#define LIST_POS TPoint(0,60)
#define TEXT_SIZE TSize(60,20)
#define LISTBOX_SIZE TSize(176,80)
// ---------------------------------------------------------
// CStackContainer::SizeChanged()
// Called by framework when the view size is changed
// ---------------------------------------------------------
//
void CStackContainer::SizeChanged()
    {
    iPushTextLabel->SetExtent( PUSH_LABEL_POS, TEXT_SIZE );
    iPushNumber->SetExtent( PUSH_EDIT_POS, TEXT_SIZE );
    iPopTextLabel->SetExtent( POP_LABEL_POS, TEXT_SIZE );
    iPopContentLabel->SetExtent( POP_CONTENT_POS, TEXT_SIZE );
    iListBox->SetExtent( LIST_POS, LISTBOX_SIZE);
    }
 
// ---------------------------------------------------------
// CStackContainer::CountComponentControls() const
// ---------------------------------------------------------
//
TInt CStackContainer::CountComponentControls() const
    {
    return 5; // return nbr of controls inside this container
    }

// ---------------------------------------------------------
// CStackContainer::ComponentControl(TInt aIndex) const
// ---------------------------------------------------------
//
CCoeControl* CStackContainer::ComponentControl(TInt aIndex) const
    {
    switch ( aIndex )
        {
        case 0:
            return iPushTextLabel;
        case 1:
            return iPushNumber;
        case 2:
            return iPopTextLabel;
        case 3:
            return iPopContentLabel;
        case 4:
            return iListBox;
        default:
            return NULL;
        }
    }

// ---------------------------------------------------------
// CStackContainer::Draw(const TRect& aRect) const
// ---------------------------------------------------------
//
void CStackContainer::Draw(const TRect& aRect) const
    {
    CWindowGc& gc = SystemGc();
    gc.SetPenStyle( CGraphicsContext::ENullPen );
    gc.SetBrushColor( KRgbGreen );
    gc.SetBrushStyle( CGraphicsContext::ESolidBrush );
    gc.DrawRect( aRect );
    }

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

// ---------------------------------------------------------
// CStackContainer::OfferKeyEventL(...)
// Notify key events to editor and listbox.
// ---------------------------------------------------------
//
TKeyResponse CStackContainer::OfferKeyEventL(
    const TKeyEvent& aKeyEvent, TEventCode aType)
    {
    if ( aType != EEventKey )
        {
        // 一般只需处理EEventKey事件，而不必处理EEventKeyDown和EEventKeyUp事件
        return EKeyWasNotConsumed;
        }

    if (iPushNumber && iPushNumber->IsFocused())
        {
        // 编辑框在激活状态时的处理
        if(aKeyEvent.iCode == EKeyDownArrow)
            {
            // 如果是方向导航键的下键，激活列表控件
            iPushNumber->SetFocus(EFalse);
            iListBox->SetFocus(ETrue);
            return EKeyWasConsumed;            
            }
        else
            {
            // 将其它按键的处理交给编辑框
            return iPushNumber->OfferKeyEventL(aKeyEvent, aType);
            }
        }
    else if (iListBox && iListBox->IsFocused())
        {
        // 列表在激活状态时的处理
        if (iListBox->CurrentItemIndex()==0 && aKeyEvent.iCode == EKeyUpArrow)
            {
            // 如果列表的当前选项是第1个，而且按键是方向导航键的上键
            // 则激活列表上面的编辑框
            iPushNumber->SetFocus(ETrue);
            iListBox->SetFocus(EFalse);
            return EKeyWasConsumed;
            }
        else
            {
            // 其它情况下的按键交给列表处理
            return iListBox->OfferKeyEventL(aKeyEvent, aType);
            }
        
        }
    // 非以上情况是，说明事件没有被处理，返回EKeyWasNotConsumed
    return EKeyWasNotConsumed;
    }

void CStackContainer::HandleCommandL(TInt aCommand)
    {   
    switch ( aCommand )
        {
        case EStackCmdAppPush:
            {
            TBuf<32> buf;
            buf.Zero();
            iPushNumber->GetText(buf);
            if (buf.Length()==0)
                {
                iEikonEnv->InfoMsg( _L("Can't push empty text") );
                }
            else
                {
                buf.Insert(0, _L("\t"));
                CDesCArray* array = static_cast<CDesCArray*>(iListBox->Model()->ItemTextArray());
                array->InsertL(0,buf);
                iListBox->HandleItemAdditionL();
                buf.Zero();
                iPushNumber->SetTextL(&buf);
                }            
            break;
            }
        case EStackCmdAppPop:
            {
            CDesCArray* array = static_cast<CDesCArray*>(iListBox->Model()->ItemTextArray());
            if (array->Count()==1)
                {
                iEikonEnv->InfoMsg( _L("The stack is empty") );
                }
            else
                {
                TBuf<32> buf;
                TPtrC ptr = (*array)[0];
                buf.Copy(ptr);
                buf.Delete(0,1);
                iEikonEnv->InfoMsg(buf);
                iPopContentLabel->SetTextL(buf);
                array->Delete(0);
                iListBox->HandleItemRemovalL();
                }
            break;
            }
        default:
            {            
            break;
            }
        }
    }

// End of File