RedCore/cocos2d/cocos/2d/CCTextFieldTTF.h

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2017 Chukong Technologies Inc.

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#ifndef __CC_TEXT_FIELD_H__
#define __CC_TEXT_FIELD_H__

#include "2d/CCLabel.h"
#include "base/CCIMEDelegate.h"

/**
 * @addtogroup ui
 * @{
 */
NS_CC_BEGIN

class TextFieldTTF;


/**
 * A input protocol for TextField.
 */
class CC_DLL TextFieldDelegate
{
public:
    /**
     * Destructor for TextFieldDelegate.
     * @js NA
     */
    virtual ~TextFieldDelegate() {}

    /**
     *@brief    If the sender doesn't want to attach to the IME, return true.
     */
    virtual bool onTextFieldAttachWithIME(TextFieldTTF* sender);
    /**
     *@brief    If the sender doesn't want to detach from the IME, return true.
     */
    virtual bool onTextFieldDetachWithIME(TextFieldTTF* sender);

    /**
     *@brief    If the sender doesn't want to insert the text, return true.
     */
    virtual bool onTextFieldInsertText(TextFieldTTF* sender, const char* text, size_t nLen);

    /**
     *@brief    If the sender doesn't want to delete the delText, return true.
     */
    virtual bool onTextFieldDeleteBackward(TextFieldTTF* sender, const char* delText, size_t nLen);

    /**
     *@brief    If the sender doesn't want to draw, return true.
     * @js NA
     */
    virtual bool onVisit(TextFieldTTF* sender, Renderer* renderer, const Mat4& transform, uint32_t flags);
};

/**
 *@brief    A simple text input field with TTF font.
 */
class CC_DLL TextFieldTTF : public Label, public IMEDelegate
{
public:
    /**
     * Default constructor.
     * @js ctor
     */
    TextFieldTTF();
    
    /**
     * Default destructor.
     * @js NA
     * @lua NA
     */
    virtual ~TextFieldTTF();

    /** Creates a TextFieldTTF from a fontname, alignment, dimension and font size.
    * @js NA
    */
    static TextFieldTTF * textFieldWithPlaceHolder(const std::string& placeholder, const Size& dimensions, TextHAlignment alignment, const std::string& fontName, float fontSize);
    
    /** Creates a TextFieldTTF from a fontname and font size.
    * @js NA
    */
    static TextFieldTTF * textFieldWithPlaceHolder(const std::string& placeholder, const std::string& fontName, float fontSize);
    
    /** Initializes the TextFieldTTF with a font name, alignment, dimension and font size. */
    bool initWithPlaceHolder(const std::string& placeholder, const Size& dimensions, TextHAlignment alignment, const std::string& fontName, float fontSize);
    
    /** Initializes the TextFieldTTF with a font name and font size. */
    bool initWithPlaceHolder(const std::string& placeholder, const std::string& fontName, float fontSize);

    /**
     *@brief    Open keyboard and receive input text.
     */
    virtual bool attachWithIME() override;

    /**
     *@brief    End text input and close keyboard.
     */
    virtual bool detachWithIME() override;

    //////////////////////////////////////////////////////////////////////////
    // properties
    //////////////////////////////////////////////////////////////////////////
    /**
     * @lua NA
     */
    TextFieldDelegate* getDelegate() const { return _delegate; }
    /**
     * @lua NA
     */
    void setDelegate(TextFieldDelegate* delegate) { _delegate = delegate; }

    /**
     * Query the currently inputed character count.
     *@return The total input character count.
     */
    std::size_t getCharCount() const { return _charCount; }
    
    /**
     * Query the color of place holder.
     *@return The place holder color.
     */
    virtual const Color4B& getColorSpaceHolder();

    /**
     *@brief Change input placeholder color.
     *@param color A color value in `Color3B`.
     */
    virtual void setColorSpaceHolder(const Color3B& color);

    /**
     * Change the placeholder color.
     *@param color The placeholder color in Color4B.
     */
    virtual void setColorSpaceHolder(const Color4B& color);

    /**
     * Change the color of input text.
     *@param textColor The text color in Color4B.
     */
    virtual void setTextColor(const Color4B& textColor) override;

    /**
     * Change input text of TextField.
     *@param text The input text of TextField.
     */
    virtual void setString(const std::string& text) override;

    /**
    * Append to input text of TextField.
    *@param text The append text of TextField.
    */
    virtual void appendString(const std::string& text);

    /**
     * Query the input text of TextField.
     *@return Get the input text of TextField.
     */
    virtual const std::string& getString() const override;

    /**
     * Change placeholder text.
     * place holder text displayed when there is no text in the text field.
     *@param text  The placeholder string.
     */
    virtual void setPlaceHolder(const std::string& text);

    /**
     * Query the placeholder string.
     *@return The placeholder string.
     */
    virtual const std::string& getPlaceHolder() const;

    /**
     * Set enable secure text entry representation.
     * If you want to display password in TextField, this option is very helpful.
     *@param value Whether or not to display text with secure text entry.
     * @js NA
     */
    virtual void setSecureTextEntry(bool value);
    virtual void setPasswordTextStyle(const std::string& text);
    const std::string& getPasswordTextStyle() const;

    /**
     * Query whether the currently display mode is secure text entry or not.
     *@return Whether current text is displayed as secure text entry.
     * @js NA
     */
    virtual bool isSecureTextEntry()const;

    virtual void visit(Renderer *renderer, const Mat4 &parentTransform, uint32_t parentFlags) override;

    virtual void update(float delta) override;

    /**
    * Set enable cursor use.
    * @js NA
    */
    void setCursorEnabled(bool enabled);

    /**
    * Set char showing cursor.
    * @js NA
    */
    void setCursorChar(char cursor);

    /**
    * Set cursor position, if enabled
    * @js NA
    */
    void setCursorPosition(std::size_t cursorPosition);

    /**
    * Set cursor position to hit letter, if enabled
    * @js NA
    */
    void setCursorFromPoint(const Vec2 &point, const Camera* camera);

protected:
    //////////////////////////////////////////////////////////////////////////
    // IMEDelegate interface
    //////////////////////////////////////////////////////////////////////////

    virtual bool canAttachWithIME() override;
    virtual bool canDetachWithIME() override;
    virtual void didAttachWithIME() override;
    virtual void didDetachWithIME() override;
    virtual void insertText(const char * text, size_t len) override;
    virtual void deleteBackward() override;
    virtual const std::string& getContentText() override;
    virtual void controlKey(EventKeyboard::KeyCode keyCode) override;

    TextFieldDelegate * _delegate;
    std::size_t _charCount;

    std::string _inputText;

    std::string _placeHolder;
    Color4B _colorSpaceHolder;
    Color4B _colorText;

    bool _secureTextEntry;
    std::string _passwordStyleText;

    // Need use cursor
    bool _cursorEnabled;
    // Current position cursor
    std::size_t _cursorPosition;
    // Char showing cursor
    char _cursorChar;
    // >0 - show, <0 - hide
    float _cursorShowingTime;

    bool _isAttachWithIME;

    void makeStringSupportCursor(std::string& displayText);
    void updateCursorDisplayText();
    void setAttachWithIME(bool isAttachWithIME);

private:
    class LengthStack;
    LengthStack * _lens;
};

NS_CC_END
// end of ui group
/// @}

#endif    // __CC_TEXT_FIELD_H__