textfield.h

Linux系统下的《红色警戒》游戏

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 * Copyright (c) 2004, 2005 darkbits                        Js_./
 * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
 * Olof Naess閚 a.k.a jansem/yakslem                _asww7!uY`>  )\a//
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#ifndef GCN_TEXTFIELD_HPP
#define GCN_TEXTFIELD_HPP

#include "guichan/platform.h"
#include "guichan/widget.h"

#include <string>

namespace gcn
{
    /**
     * A text field in which you can write or display a line of text.
     */
    class GCN_CORE_DECLSPEC TextField:
        public Widget,
        public MouseListener,
        public KeyListener
    {
    public:
        /**
         * Default constructor.
         */
        TextField();

        /**
         * Constructor. Initializes the textfield with a given string.
         *
         * @param text the initial text.
         */
        TextField(const std::string& text);

        /**
         * Sets the text.
         *
         * @param text the new text in the TextField.
         */
        virtual void setText(const std::string& text);

        /**
         * Gets the text.
         *
         * @return the text of the TextField.
         */
        virtual const std::string& getText() const;

        /**
         * Draws the caret (the little marker in the text that shows where the
         * letters you type will appear). Easily overloaded if you want to
         * change the style of the caret.
         *
         * @param graphics the Graphics object to draw with.
         * @param x the caret's x-position.
         */
        virtual void drawCaret(Graphics* graphics, int x);

        /**
         * Adjusts the size of the TextField to fit the font size. The
         * constructor taking a string uses this function to initialize the
         * size of the TextField.
         */
        virtual void adjustSize();

        /**
         * Adjusts the height of the text field to fit the font size. The
         * height of the TextField is initialized with this function by the
         * constructors.
         */
        virtual void adjustHeight();

        /**
         * Sets the caret position.
         *
         * @param position the caret position.
         */
        virtual void setCaretPosition(unsigned int position);

        /**
         * Gets the caret position.
         *
         * @return the caret position.
         */
        virtual unsigned int getCaretPosition() const;


        // Inherited from Widget

        virtual void fontChanged();

        virtual void draw(Graphics* graphics);

        virtual void drawBorder(Graphics* graphics);


        // Inherited from MouseListener

        virtual void mousePress(int x, int y, int button);


        // Inherited from KeyListener

        virtual bool keyPress(const Key& key);

    protected:
        /**
         * Scrolls the text horizontally so that the caret shows if needed.
         */
        void fixScroll();

        std::string mText;
        int mCaretPosition;
        int mXScroll;
    };
}

#endif // end GCN_TEXTFIELD_HPP