logexampleappui.cpp

Log Engine的使用

/*
* ============================================================================
*  Name     : CLogExampleAppUi from LogExampleAppui.cpp
*  Part of  : LogExample
*  Created  : 26.05.2005 by Forum Nokia 
*  Implementation notes:
*     Initial content was generated by Series 60 Application Wizard.
*  Version  : 1.0
*  Copyright: Nokia Corporation 
* ============================================================================
*/

// INCLUDE FILES
#include "LogExampleAppui.h"
#include "LogExampleView.h"
#include "LogExampleView2.h"
#include "LogExampleLogDatabaseObserver.h"
#include "LogExEngine.h"
#include "LogExample.hrh"

#include <akntitle.h>
#include <eikmenup.h>
#include <AknGlobalNote.h>  //CAknGlobalNote
#include <LogExample.rsg>

#include <avkon.hrh>

//CONSTANTS
_LIT(KRecentEventsTextNote, "Recent events");
_LIT(KEventsTextNote, "Events");

// ================= MEMBER FUNCTIONS =======================
//
// ----------------------------------------------------------
// CLogExampleAppUi::ConstructL()
// Two phased constructor
// ----------------------------------------------------------
//
void CLogExampleAppUi::ConstructL()
    {
    BaseConstructL(EAknEnableSkin);
    
    iLogEngine = CLogExEngine::NewL();

    // Show tabs for main views from resources
    CEikStatusPane* sp = StatusPane();

    // Fetch pointer to the default navi pane control
    iNaviPane = (CAknNavigationControlContainer*)sp->ControlL( 
        TUid::Uid(EEikStatusPaneUidNavi));

    // Tabgroup has been read from resource and it was pushed to the navi pane. 
    // Get pointer to the navigation decorator with the ResourceDecorator() function. 
    // Application owns the decorator and it has responsibility to delete the object.
    iDecoratedTabGroup = iNaviPane->ResourceDecorator();
    
    // If Null, doesn't make sense to continue
    User::LeaveIfNull(iDecoratedTabGroup);
 
    iTabGroup = (CAknTabGroup*) iDecoratedTabGroup->DecoratedControl();
	iTabGroup->SetObserver( this );


    CLogExampleView* view1 = new (ELeave) CLogExampleView;

    CleanupStack::PushL( view1 );
    view1->ConstructL();
    AddViewL( view1 );      // transfer ownership to CAknViewAppUi
    CleanupStack::Pop( view1 );

    CLogExampleView2* view2 = new (ELeave) CLogExampleView2;

    CleanupStack::PushL( view2 );
    view2->ConstructL();
    AddViewL( view2 );      // transfer ownership to CAknViewAppUi
    CleanupStack::Pop( view2 );

	iLogDatabaseObserver = CLogExampleLogDatabaseObserver::NewL(*this);
	iLogDatabaseObserver->NotifyChange();

	iLogEngine->SetObserver(view1->GetObserver());
	iLogEngine->SetRecentObserver(view2->GetObserver());
	
    SetDefaultViewL(*view1);
	SetTitleL(KEventsTextNote);
    }

// ----------------------------------------------------
// CLogExampleAppUi::~CLogExampleAppUi()
// Destructor
// Frees reserved resources
// ----------------------------------------------------
//
CLogExampleAppUi::~CLogExampleAppUi()
    {
    delete iLogDatabaseObserver;
    delete iDecoratedTabGroup;
    delete iLogEngine;
	}

//
// ----------------------------------------------------
// CLogExampleAppUi::Model()
// Returns model
// ----------------------------------------------------
//	
CLogExEngine* CLogExampleAppUi::Model()
	{
	return iLogEngine;		
	}

//
// ----------------------------------------------------
// CLogExampleAppUi::NotifyChangeL()
// Shows notify of change in database
// ----------------------------------------------------
//
void CLogExampleAppUi::NotifyChangeL()
	{
	TInt index = iTabGroup->ActiveTabIndex();
	switch (index)
		{
		//Update events tab
		case 0:
			{
			CLogExampleView* view = static_cast<CLogExampleView*>(View(TUid::Uid(iTabGroup->TabIdFromIndex(index))));
			view->RefreshL();
			break;
			}
		//Update recent event tab
		case 1:
			{
			CLogExampleView2* view = static_cast<CLogExampleView2*>(View(TUid::Uid(iTabGroup->TabIdFromIndex(index))));
			view->ResetEventList();

		    iLogEngine->ClearEventFilter();
		    
		    // Start reading recent events from the log database
        	iLogEngine->ReadRecentEventsL(); 
			break;
			}
		
		default:
		break;
		}
	}
	
// ------------------------------------------------------------------------------
// CLogExampleAppUi::DynInitMenuPaneL(TInt aResourceId,CEikMenuPane* aMenuPane)
//  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 CLogExampleAppUi::DynInitMenuPaneL(
    TInt /*aResourceId*/,CEikMenuPane* /*aMenuPane*/)
    {
    }

// ----------------------------------------------------
// CLogExampleAppUi::HandleKeyEventL(
//     const TKeyEvent& aKeyEvent,TEventCode aType)
// takes care of key event handling
// ----------------------------------------------------
//
TKeyResponse CLogExampleAppUi::HandleKeyEventL(
    const TKeyEvent& aKeyEvent,TEventCode aType)
    {
	if ( iTabGroup == NULL )
        {
        return EKeyWasNotConsumed;
        }

    if ( aKeyEvent.iCode == EKeyLeftArrow || aKeyEvent.iCode == EKeyRightArrow )
        {
        return iTabGroup->OfferKeyEventL( aKeyEvent, aType );
        }
    else
        {
        return EKeyWasNotConsumed;
        }
    }

// ----------------------------------------------------
// CLogExampleAppUi::SetTitleL(const TDesC& aTitle)
// Sets the title of the title pane
// ----------------------------------------------------
//

void CLogExampleAppUi::SetTitleL(const TDesC& aTitle)
	{
		
    TUid tPaneUid;
    tPaneUid.iUid = EEikStatusPaneUidTitle;
	CEikStatusPane* sPane = StatusPane();
   	CEikStatusPaneBase::TPaneCapabilities subPane = sPane->PaneCapabilities(tPaneUid);
   	
    // Check if title pane can be accessed
	if (subPane.IsPresent() && subPane.IsAppOwned())
		{
    	CAknTitlePane* tPane = (CAknTitlePane*) sPane->ControlL(tPaneUid);
    	tPane->SetTextL(aTitle);
        }
	}


// ----------------------------------------------------
// CLogExampleAppUi::HandleCommandL(TInt aCommand)
// takes care of command handling
// ----------------------------------------------------
//
void CLogExampleAppUi::HandleCommandL(TInt aCommand)
    {
    switch ( aCommand )
        {
        case EEikCmdExit:
        case EAknSoftkeyExit:
            {
            Exit();
            break;
            }
       
        default:
            break;      
        }
    }


 // ----------------------------------------------------
 // CLogExampleAppUi::TabChangedL(TInt aIndex)
 // This method gets called when CAknTabGroup active 
 // tab has changed.
 // ----------------------------------------------------
 //
 void CLogExampleAppUi::TabChangedL(TInt aIndex)
     {
     switch (aIndex)
	     {
	     case 0:
		    {
		    SetTitleL(KEventsTextNote);
		    break;	
		    }	     
	     case 1:
		    {
		    iLogEngine->ClearEventFilter();
		    
		    // Start reading recent events from the log database
        	iLogEngine->ReadRecentEventsL(); 
		    SetTitleL(KRecentEventsTextNote);
		    break;		
		    }
	     default:
	     	break;
	     }
     ActivateLocalViewL(TUid::Uid(iTabGroup->TabIdFromIndex(aIndex)));
     }

// End of File