hackedteam/core-symbian

// Splitting long running tasks with active objects
// http://wiki.forum.nokia.com/index.php/Splitting_long_running_tasks_with_active_objects

#ifndef LONGTASKAO_H
#define LONGTASKAO_H

#include <e32base.h>    // For CActive, link against: euser.lib
#include <e32std.h>        


class MLongTaskCallBack 
{
public:
    virtual void DoOneRoundL() = 0;
};


class CLongTaskAO : public CActive
{
public:
    // C++ constructor
    static CLongTaskAO* NewL(MLongTaskCallBack& callBack);
    
    // Cancel and destroy
    ~CLongTaskAO();

    // Function for making the initial request
    void NextRound();

private: // From CActive    
    CLongTaskAO(MLongTaskCallBack& callBack);
    
    // Second-phase constructor
    void ConstructL();
    
    // Handle completion
    void RunL();
    
    // How to cancel me
    void DoCancel();
    
    // Override to handle leaves from RunL(). Default implementation causes
    // the active scheduler to panic.
    //void RunError(TInt aError);

private:
    MLongTaskCallBack& iCallBack;
};

#endif