widget.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
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#ifndef GCN_WIDGET_HPP
#define GCN_WIDGET_HPP

#include <list>
#include <string>

#include "guichan/actionlistener.h"
#include "guichan/color.h"
#include "guichan/defaultfont.h"
#include "guichan/font.h"
#include "guichan/graphics.h"
#include "guichan/keyinput.h"
#include "guichan/keylistener.h"
#include "guichan/mouseinput.h"
#include "guichan/mouselistener.h"
#include "guichan/rectangle.h"
#include "guichan/platform.h"

namespace gcn
{
    /*
     * Exists for the widget class to compile.
     */
    class FocusHandler;

    /*
     * Exists for the widget class to compile.
     */
    class BasicContainer;

    /**
     * Widget base class. Contains basic widget functions every widget should
     * have. Widgets should inherit from this class and implements it's
     * functions.
     *
     * NOTE: Functions begining with underscore "_" should not
     *       be overloaded unless you know what you are doing.
     */
    class GCN_CORE_DECLSPEC Widget
    {
    public:
        /**
         * Constructor. Resets member variables. Noteable, a widget is not
         * focusable as default, therefore, Widgets that are supposed to be
         * focusable should overide this default in their own constructor.
         */
        Widget();
    
        /**
         * Default destructor.
         */
        virtual ~Widget();

        /**
         * Draws the Widget. It is called by the parent widget when it is time
         * for the Widget to draw itself. The graphics object is set up so
         * that all drawing is relative to the Widget, i.e coordinate (0,0) is
         * the top-left corner of the Widget. It is not possible to draw
         * outside of a Widgets dimension.
         *
         * @param graphics a Graphics object to draw with.
         */
        virtual void draw(Graphics* graphics) = 0;
        
        /**
         * Draws a the Widget border. A border is drawn around a Widget.
         * The width and height of the border is therefore the Widgets
         * height+2*bordersize. Think of a painting that has a certain size,
         * the border surrounds the painting. 
         *
         * @param graphics a Graphics object to draw with.
         */
        virtual void drawBorder(Graphics* graphics) { }
        
        /**
         * Called for all Widgets in the gui each time Gui::logic is called.
         * You can do logic stuff here like playing an animation.
         *
         * @see Gui
         */
        virtual void logic() { }
    
        /**
         * Gets the Widget parent container.
         *
         * @return the Widget parent container. Returns NULL if the Widget
         *         has no parent.         
         */
        virtual BasicContainer* getParent() const;
    
        /**
         * Sets the width of the Widget in pixels.
         *
         * @param width the Widget width in pixels.
         */
        virtual void setWidth(int width);

        /**
         * Gets the width of the Widget in pixels.
         *
         * @return the Widget with in pixels.
         */
        virtual int getWidth() const;
    
        /**
         * Sets the height of the Widget in pixels.
         *
         * @param height the Widget height in pixels.
         */
        virtual void setHeight(int height);

        /**
         * Gets the height of the Widget in pixels.
         *
         * @return the Widget height in pixels.
         */
        virtual int getHeight() const;

        /**
         * Sets the size of the Widget.
         *
         * @param width the width.
         * @param height the height.
         */
        virtual void setSize(int width, int height);
        
        /**
         * Set the Widget x coordinate. It is relateive to it's parent.
         *
         * @param x the Widget x coordinate.
         */
        virtual void setX(int x);

        /**
         * Gets the Widget x coordinate. It is relative to it's parent.
         *
         * @return the Widget x coordinate.
         */
        virtual int getX() const;

        /**
         * Set the Widget y coordinate. It is relative to it's parent.
         *
         * @param y the Widget y coordinate. 
         */
        virtual void setY(int y);

        /**
         * Gets the Widget y coordinate. It is relative to it's parent.
         *
         * @return the Widget y coordinate.
         */
        virtual int getY() const;

        /**
         * Sets the Widget position. It is relative to it's parent.
         *
         * @param x the Widget x coordinate.
         * @param y the Widgets y coordinate.
         */
        virtual void setPosition(int x, int y);
    
        /**
         * Sets the dimension of the Widget. It is relative to it's parent.
         *
         * @param dimension the Widget dimension.
         */
        virtual void setDimension(const Rectangle& dimension);

        /**
         * Sets the size of the border, or the width if you so like. The size
         * is the number of pixels that the border extends outside the Widget.
         * Border size = 0 means no border.         
         *
         * @param borderSize the size of the border.
         * @see drawBorder         
        */
        virtual void setBorderSize(unsigned int borderSize);

        /**
         * Gets the size of the border, or the width if you so like. The size
         * is the number of pixels that the border extends outside the Widget.
         * Border size = 0 means no border.                      
         *
         * @return the size of the border.
         * @see drawBorder         
         */
        virtual unsigned int getBorderSize() const;
        
        /**
         * Gets the dimension of the Widget. It is relative to it's parent.
         *
         * @return the widget dimension.
         */
        virtual const Rectangle& getDimension() const;

        /**
         * Sets a Widgets focusability.
         *
         * @param focusable true if the Widget should be focusable.
         */
        virtual void setFocusable(bool focusable);

        /**
         * Checks whether the Widget is focusable.
         *
         * @return true if the widget is focusable.
         */
        virtual bool isFocusable() const;
        
        /**
         * Checks if the Widget has focus.
         *
         * @return true if the widget currently has focus.
         */
        virtual bool hasFocus() const;

        /**
         * Sets the Widget to be disabled or enabled. A disabled
         * Widget will never recieve mouse or key input.
         *
         * @param enabled true if Widget is enabled.
         */
        virtual void setEnabled(bool enabled);

        /**
         * Checks if a Widget is disabled or not.
         *
         * @return true if the Widget should be enabled.
         */
        virtual bool isEnabled() const; 
        
        /**
         * Called if the Widget looses focus.
         */
        virtual void lostFocus() { };
    
        /**
         * Called if the Widget recieves focus.       
         */
        virtual void gotFocus() { };
    
        /**
         * Checks if the Widget has the mouse.
         *
         * @return true if the Widget has the mouse.
         */
        virtual bool hasMouse() const;
    
        /**
         * Sets the Widget to be visible.
         *
         * @param visible true if the Widget should be visiable.
         */
        virtual void setVisible(bool visible);

        /**
         * Checks if the Widget is visible.
         *
         * @return true if the Widget is visible.
         */
        virtual bool isVisible() const;

        /**
         * Sets the base color. The base color is the background
         * color for many Widgets like the Button and Contianer Widgets.
         *
         * @param color the baseground Color.
         */
        virtual void setBaseColor(const Color& color);

        /**
         * Gets the base color.
         *
         * @return the foreground Color.
         */
        virtual const Color& getBaseColor() const;
    
        /**
         * Sets the foreground color.
         *
         * @param color the foreground Color.
         */
        virtual void setForegroundColor(const Color& color);

        /**
         * Gets the foreground color.
         *
         * @return the foreground Color.
         */
        virtual const Color& getForegroundColor() const;
    
        /**
         * Sets the background color.
         *
         * @param color the background Color.
         */
        virtual void setBackgroundColor(const Color& color);

        /**
         * Gets the background color.
         *
         * @return the background Color.
         */
        virtual const Color& getBackgroundColor() const;    

        /**
         * Sets the disabled color.
         *
         * @param color the disabled Color.