RedCore/cocos2d/cocos/base/CCIMEDelegate.h

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org
Copyright (c) 2013-2017 Chukong Technologies Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#ifndef __CC_IME_DELEGATE_H__
#define __CC_IME_DELEGATE_H__

#include <string>
#include "math/CCGeometry.h"
#include "base/CCEventKeyboard.h"

/**
 * @addtogroup base
 * @{
 */
NS_CC_BEGIN

/**
 * A static global empty std::string install.
 */
extern const std::string CC_DLL STD_STRING_EMPTY;


/**
 * Keyboard notification event type.
 */
typedef struct
{
    Rect  begin;              // the soft keyboard rectangle when animation begins
    Rect  end;                // the soft keyboard rectangle when animation ends
    float     duration;           // the soft keyboard animation duration
} IMEKeyboardNotificationInfo;

/**
 *@brief    Input method editor delegate.
 */
class CC_DLL IMEDelegate
{
public:
    /**
     * Default constructor.
     * @js NA
     * @lua NA
     */
    virtual ~IMEDelegate();
    
    /**
     * Default destructor.
     * @js NA
     * @lua NA
     */
    virtual bool attachWithIME();
    
    /**
     * Determine whether the IME is detached or not.
     * @js NA
     * @lua NA
     */
    virtual bool detachWithIME();

protected:
    friend class IMEDispatcher;

    /**
    @brief    Decide if the delegate instance is ready to receive an IME message.

    Called by IMEDispatcher.
    * @js NA
    * @lua NA
    */
    virtual bool canAttachWithIME() { return false; }
    /**
    @brief    When the delegate detaches from the IME, this method is called by IMEDispatcher.
    * @js NA
    * @lua NA
    */
    virtual void didAttachWithIME() {}

    /**
    @brief    Decide if the delegate instance can stop receiving IME messages.
    * @js NA
    * @lua NA
    */
    virtual bool canDetachWithIME() { return false; }

    /**
    @brief    When the delegate detaches from the IME, this method is called by IMEDispatcher.
    * @js NA
    * @lua NA
    */
    virtual void didDetachWithIME() {}

    /**
    @brief    Called by IMEDispatcher when text input received from the IME.
    * @js NA
    * @lua NA
    */
    virtual void insertText(const char* /*text*/, size_t /*len*/) {}

    /**
    @brief    Called by IMEDispatcher after the user clicks the backward key.
    * @js NA
    * @lua NA
    */
    virtual void deleteBackward() {}

    /**
    @brief    Called by IMEDispatcher after the user press control key.
    * @js NA
    * @lua NA
    */
    virtual void controlKey(EventKeyboard::KeyCode /*keyCode*/) {}

    /**
    @brief    Called by IMEDispatcher for text stored in delegate.
    * @js NA
    * @lua NA
    */
    virtual const std::string& getContentText() { return STD_STRING_EMPTY; }

    //////////////////////////////////////////////////////////////////////////
    // keyboard show/hide notification
    //////////////////////////////////////////////////////////////////////////
    /**
     * @js NA
     * @lua NA
     */
    virtual void keyboardWillShow(IMEKeyboardNotificationInfo& /*info*/)   {}
    /**
     * @js NA
     * @lua NA
     */
    virtual void keyboardDidShow(IMEKeyboardNotificationInfo& /*info*/)    {}
    /**
     * @js NA
     * @lua NA
     */
    virtual void keyboardWillHide(IMEKeyboardNotificationInfo& /*info*/)   {}
    /**
     * @js NA
     * @lua NA
     */
    virtual void keyboardDidHide(IMEKeyboardNotificationInfo& /*info*/)    {}

protected:
    /**
     * @js NA
     * @lua NA
     */
    IMEDelegate();
};


NS_CC_END
// end of base group
/// @}

#endif    // __CC_IME_DELEGATE_H__