axmol/cocos2dx/include/CCIMEDispatcher.h

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

http://www.cocos2d-x.org

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****************************************************************************/

#ifndef __CC_IME_DISPATCHER_H__
#define __CC_IME_DISPATCHER_H__

#include "CCIMEDelegate.h"

NS_CC_BEGIN

/**
@brief    Input Method Edit Message Dispatcher.
*/
class CC_DLL CCIMEDispatcher
{
public:
    ~CCIMEDispatcher();

    /**
    @brief Returns the shared CCIMEDispatcher object for the system.
    */
    static CCIMEDispatcher* sharedDispatcher();

//     /**
//     @brief Release all CCIMEDelegates from shared dispatcher.
//     */
//     static void purgeSharedDispatcher();

    /**
    @brief dispatch the input text from ime
    */
    void dispatchInsertText(const char * pText, int nLen);

    /**
    @brief    dispatch the delete backward operation
    */
    void dispatchDeleteBackward();

    /**
    @brief    get the content text, which current CCIMEDelegate which attached with IME has.
    */
    const char * getContentText();

    //////////////////////////////////////////////////////////////////////////
    // dispatch keyboard notification
    //////////////////////////////////////////////////////////////////////////
    void dispatchKeyboardWillShow(CCIMEKeyboardNotificationInfo& info);
    void dispatchKeyboardDidShow(CCIMEKeyboardNotificationInfo& info);
    void dispatchKeyboardWillHide(CCIMEKeyboardNotificationInfo& info);
    void dispatchKeyboardDidHide(CCIMEKeyboardNotificationInfo& info);

protected:
    friend class CCIMEDelegate;

    /**
    @brief add delegate to concern ime msg
    */
    void addDelegate(CCIMEDelegate * pDelegate);

    /**
    @brief    attach the pDeleate with ime.
    @return If the old delegate can detattach with ime and the new delegate 
            can attach with ime, return true, otherwise return false.
    */
    bool attachDelegateWithIME(CCIMEDelegate * pDelegate);
    bool detachDelegateWithIME(CCIMEDelegate * pDelegate);

    /**
    @brief remove the delegate from the delegates who concern ime msg
    */
    void removeDelegate(CCIMEDelegate * pDelegate);

private:
    CCIMEDispatcher();
    
    class Impl;
    Impl * m_pImpl;
};

NS_CC_END

#endif    // __CC_IME_DISPATCHER_H__