aknexmenusubview.cpp

symbian ui的 例子 初学者可以 好好看看,这个是培训的资料,应该比较宝贵

/* Copyright (c) 2005, Nokia. All rights reserved */


// INCLUDE FILES
#include <eikmenub.h>
#include <aknviewappui.h>
#include <avkon.hrh>
#include <AknExMenu.rsg>

#include "AknExMenuSubView.h"
#include "AknExMenuSubContainer.h" 
#include "AknExMenu.hrh"
#include "AknExMenuappui.h"

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

// -----------------------------------------------------------------------------
// CAknExMenuSubView::ConstructL()
// Symbian 2nd phase constructor can leave.
// -----------------------------------------------------------------------------
//
void CAknExMenuSubView::ConstructL( TInt aResId )
    {
    BaseConstructL( aResId );
    iState = EAknExMenuStateLast;
    iCoeEnv->ReadResource( iUpperMsg, R_AKNEXMENU_SUB_UP_TEXT );
    iCoeEnv->ReadResource( iLowerMsg, R_AKNEXMENU_SUB_LOW_TEXT );
    iCoeEnv->ReadResource( iTitleMsg, R_AKNEXMENU_SUB_TITLE );
    }

// -----------------------------------------------------------------------------
// CAknExMenuSubView::~CAknExMenuSubView()
// Destructor.
// -----------------------------------------------------------------------------
//
CAknExMenuSubView::~CAknExMenuSubView()
    {
    if ( iContainer )
        {
        AppUi()->RemoveFromStack( iContainer );
        }

    delete iContainer;
    }

// -----------------------------------------------------------------------------
// TUid CAknExMenuSubView::Id()
// returns SubView's Uid
// -----------------------------------------------------------------------------
//
TUid CAknExMenuSubView::Id() const
    {
    return KSubViewId;
    }

// -----------------------------------------------------------------------------
// CAknExMenuSubView::HandleCommandL()
// Takes care of command handling.
// -----------------------------------------------------------------------------
//
void CAknExMenuSubView::HandleCommandL( TInt aCommand )
    {   
    TBuf<KLengthOfMsgStringInSubView> msgFormat;
    TBuf<KLengthOfMsgStringInSubView> msgString;

    iCoeEnv->ReadResource(  msgFormat, R_AKNEXMENU_MESSAGE_FORMAT  );
    msgString.Format( msgFormat, aCommand );
    iEikonEnv->AlertWin( msgString );

    switch ( aCommand )
        {
         case EEikCmdExit:
         case EAknSoftkeyBack:
            {
            AppUi()->HandleCommandL( EAknCmdExit );
            break;
            }

        case EAknExMenuCmdSubMoreItems:
            {
            iState = EAknExMenuStateMoreItems;
            break;
            }
        case EAknExMenuCmdSubLessItems:
            {
            iState = EAknExMenuStateLessItems;
            break;
            }
       
        default:
            {
            AppUi()->HandleCommandL( aCommand );
            break;
            }
        }
    }

// -----------------------------------------------------------------------------
// CAknExMenuSubView::DynInitMenuPaneL()
// This function is called by the EIKON framework just before it displays
// a menu pane. Its default implementation is empty, and by overriding it,
// the application can set the state of menu items dynamically according
// to the state of application data.
// -----------------------------------------------------------------------------
//
void CAknExMenuSubView::DynInitMenuPaneL( TInt aResourceId,
                                          CEikMenuPane* aMenuPane )
    {

    if ( R_AKNEXMENU_TEST_SUB_MENU1 == aResourceId )
        {
        if ( EAknExMenuStateMoreItems == iState )
            {
            TBuf< KLengthOfMsgStringInSubView > format;
            CEikMenuPaneItem::SData item;

            // Read out then new menu text string
            iCoeEnv->ReadResource(  format, R_AKNEXMENU_NEW_ITEM  );
            
            item.iCommandId = EAknExMenuCmdSub1;
            item.iFlags = 0;
            item.iCascadeId = 0;
            for ( TInt i = 1; i <=100; i++ )
                {
                // add 100 items to submenu pane
                item.iText.Format( format, i );
                aMenuPane->AddMenuItemL( item,EAknExMenuCmdSubMoreItems );
                }
            }
        }

    if ( EAknExMenuStateLessItems == iState )
        {
        iState = EAknExMenuStateLast;
        }

    if ( EAknExMenuStateLast == iState )
        {
        return;
        }

    }
// -----------------------------------------------------------------------------
// CAknExMenuSubView::DoActivateL()
// Activate an AknView
// -----------------------------------------------------------------------------
//
void CAknExMenuSubView::DoActivateL( const TVwsViewId& /*aPrevViewId*/,
                                     TUid /*aCustomMessageId*/,
                                     const TDesC8& /*aCustomMessage*/ )
    {
    
    iContainer = new( ELeave ) CAknExMenuSubContainer;
    iContainer->SetMopParent( this );
    iContainer->ConstructL( ClientRect(), this );
    static_cast <CAknExMenuAppUi*> ( AppUi() )->iTitlePane->SetTextL( iTitleMsg );
    AppUi()->AddToStackL( *this, iContainer );
   }

// -----------------------------------------------------------------------------
// CAknExMenuSubView::DoDeactivate()
// Deactivate an AknView
// -----------------------------------------------------------------------------
//
void CAknExMenuSubView::DoDeactivate()
    {
    if ( iContainer )
        {
        AppUi()->RemoveFromStack( iContainer );
        }
    
    delete iContainer;
    iContainer = NULL;
    }

// End of File