/**

     * Constructor 

     * @param pointor of state manager

     * @param - previous state

     */

	GlxGridState( GlxStateManager *stateManager, GlxState *preState = NULL );

    /**

     * state() - This funtion return the internal state of a state

     * @return - internal state

     */	

    /** 

     * setState() - This funtion use for set the internal state of a state

     * @param - internal state of the state

     */	

	void setState( int internalState ) { mState = (GridState) internalState; }

    /**

     * eventHandler() - It is event handler of the grid state

     * @param - command or event id

     */	

	void eventHandler( qint32 &id );

    /**

     * setTranstionParameter() - This function set the view transtion effect parameter.

     * These values is use to run the animation during view transition.

     * In the case of forward direction it should call with the next state and in the case of back ward direction

     * it should call with the current state

     * @param View transtion id

     * @param to play the animation on which views

     */

     void setTranstionParameter( NavigationDir dir, GlxEffect &effect, GlxViewEffect &viewEffect );

    /**

     * commandId() - it will return the current runing command id

     * @reutn - command id

     */

     qint32 commandId( ) { return mCommandId; }

    /**

     * defaultEventHandler() - It is a common event handler used for all the internal states.

     * @param - command or event id

     */

    /**

     * allItemEventHandler() - It is a event handler used for All and fetcher internal states.

     * @param - command or event id

     */

    /**

     * albumItemEventHandler() - It is a event handler used for album and fetcher album interanl states.

     * @param - command or event id

     */

private :

	GridState mState; 	            // grid internal state

	GlxStateManager *mStateManager; // state manager

	bool mIsMarkingMode;            // marking mode status

	qint32 mCommandId;              //commandID, save the command before entering into the marking mode for next user interaction