blinklabel.cpp

基于Symbian OS的手机开发与应用实践第12章代码。主要讲各种时钟

/*
* ============================================================================
*  Name     : CBlinkLabel from BlinkLabel.cpp
*  Part of  : Blink
*  Created  : 05.02.2006 by ToBeReplacedByAuthor
*  Implementation notes:
*     Initial content was generated by Series 60 Application Wizard.
*  Version  :
*  Copyright: ToBeReplacedByCopyright
* ============================================================================
*/

// INCLUDE FILES
#include "BlinkLabel.h"


// ================= MEMBER FUNCTIONS =======================
// Destructor
CBlinkLabel::~CBlinkLabel()
    {
    if(iPeriodic!=NULL)
        {
        iPeriodic->Cancel();
        delete iPeriodic;
        }
    }

// ---------------------------------------------------------
// CBlinkLabel::SetBlinkL()
// ---------------------------------------------------------
//
void CBlinkLabel::SetBlinkL(TBool aBlink)
    {
    if(aBlink)
        {
        if(iPeriodic==NULL)
            {
            iPeriodic = CPeriodic::NewL(CActive::EPriorityStandard);
            }

        if(!iPeriodic->IsActive())
            {
            iPeriodic->Start(500000,500000,TCallBack(Tick, this));
            }
        }
    else
        {
        if(iPeriodic!=NULL)
            {
            iPeriodic->Cancel();
            }
        MakeVisible(ETrue);
        DrawDeferred();
        }
    }


// ---------------------------------------------------------
// CBlinkLabel::Blink()
// ---------------------------------------------------------
//
TBool CBlinkLabel::Blink()
    {
    if(iPeriodic==NULL)
        {
        return EFalse;
        }
    return iPeriodic->IsActive();
    }


TInt CBlinkLabel::Tick(TAny* aObject)
    {
    ((CBlinkLabel*)aObject)->DoTick(); // cast, and call non-static function
    return 1;
    }

void CBlinkLabel::DoTick()
    {
    MakeVisible(!IsVisible());
    DrawDeferred();
    }

// End of File