#include <iostream>
#include <string.h>
 
using namespace std;
 
class Icon
{
public:
    Icon(char *fileName)
    {
        strcpy(_name, fileName);
        if (!strcmp(fileName, "go"))
        {
            _width = 20;
            _height = 20;
        }
        if (!strcmp(fileName, "stop"))
        {
            _width = 40;
            _height = 40;
        }
        if (!strcmp(fileName, "select"))
        {
            _width = 60;
            _height = 60;
        }
        if (!strcmp(fileName, "undo"))
        {
            _width = 30;
            _height = 30;
        }
    }
    const char *getName()
    {
        return _name;
    }
    void draw(int x, int y)
    {
        cout << "   drawing " << _name << ": upper left (" << x << "," << y << 
            ") - lower right (" << x + _width << "," << y + _height << ")" <<
            endl;
    }
private:
    char _name[20];
    int _width;
    int _height;
};
 
class FlyweightFactory
{
public:
    static Icon *getIcon(char *name)
    {
        for (int i = 0; i < _numIcons; i++)
            if (!strcmp(name, _icons[i]->getName()))
                return _icons[i];
        _icons[_numIcons] = new Icon(name);
        return _icons[_numIcons++];
    }
    static void reportTheIcons()
    {
        cout << "Active Flyweights: ";
        for (int i = 0; i < _numIcons; i++)
            cout << _icons[i]->getName() << " ";
        cout << endl;
    }
private:
    enum
    {
        MAX_ICONS = 5
    };
    static int _numIcons;
    static Icon *_icons[MAX_ICONS];
};
 
int FlyweightFactory::_numIcons = 0;
Icon *FlyweightFactory::_icons[];
 
class DialogBox
{
public:
    DialogBox(int x, int y, int incr): _iconsOriginX(x), _iconsOriginY(y),
        _iconsXIncrement(incr){}
    virtual void draw() = 0;
protected:
    Icon *_icons[3];
    int _iconsOriginX;
    int _iconsOriginY;
    int _iconsXIncrement;
};
 
class FileSelection: public DialogBox
{
public:
    FileSelection(Icon *first, Icon *second, Icon *third): DialogBox(100, 100,
        100)
    {
        _icons[0] = first;
        _icons[1] = second;
        _icons[2] = third;
    }
    void draw()
    {
        cout << "drawing FileSelection:" << endl;
        for (int i = 0; i < 3; i++)
            _icons[i]->draw(_iconsOriginX + (i *_iconsXIncrement), _iconsOriginY);
    }
};
 
class CommitTransaction: public DialogBox
{
public:
    CommitTransaction(Icon *first, Icon *second, Icon *third): DialogBox(150,
        150, 150)
    {
        _icons[0] = first;
        _icons[1] = second;
        _icons[2] = third;
    }
    void draw()
    {
        cout << "drawing CommitTransaction:" << endl;
        for (int i = 0; i < 3; i++)
            _icons[i]->draw(_iconsOriginX + (i *_iconsXIncrement), _iconsOriginY);
    }
};
 
int main()
{
    DialogBox *dialogs[2];
    dialogs[0] = new FileSelection(FlyweightFactory::getIcon("go"),
        FlyweightFactory::getIcon("stop"), FlyweightFactory::getIcon("select"));
    dialogs[1] = new CommitTransaction(FlyweightFactory::getIcon("select"),
        FlyweightFactory::getIcon("stop"), FlyweightFactory::getIcon("undo"));
 
    for (int i = 0; i < 2; i++)
        dialogs[i]->draw();
 
    FlyweightFactory::reportTheIcons();
}