Реализации на С++

Flyweight

Общая реализация на языке С++

Glyph

class Glyph 
{
public:
    virtual ~Glyph();
    virtual void Draw(Window*, GlyphContext&);
    virtual void SetFont(Font*, GlyphContext&);
    virtual Font* GetFont(GlyphContext&);
    virtual void First(GlyphContext&);
    virtual void Next(GlyphContext&);
    virtual bool IsDone(GlyphContext&);
    virtual Glyph* Current(GlyphContext&);
    virtual void Insert(Glyph*, GlyphContext&);
    virtual void Remove(GlyphContext&);
protected:
    Glyph();
};

Character

class Character : public Glyph 
{
public:
    Character(char);
    virtual void Draw(Window*, GlyphContext&);
private:
    char _charcode;
};

GlyphContext

class GlyphContext 
{
public:
    GlyphContext();
    virtual ~GlyphContext();
    virtual void Next(int step = 1);
    virtual void Insert(int quantity = 1);
    virtual Font* GetFont();
    virtual void SetFont(Font*, int span = 1);
private:
    int _index;
    BTree* _fonts;
};

GlyphFactory

const int NCHARCODES = 128;

class GlyphFactory 
{
public:
    GlyphFactory();
    virtual ~GlyphFactory();
    virtual Character* CreateCharacter(char);
    virtual Row* CreateRow();
    virtual Column* CreateColumn();
private:
    Character* _character[NCHARCODES];
};

GlyphFactory methods

# pragma region Methods
GlyphFactory::GlyphFactory () 
{
    for (int i = 0; i < NCHARCODES; ++i) 
        _character[i] = 0;
}
Character* GlyphFactory::CreateCharacter (char c) 
{
    if (!_character[c]) 
        _character[c] = new Character(c);
    return _character[c];
}
Row* GlyphFactory::CreateRow () 
{
    return new Row;
}
Column* GlyphFactory::CreateColumn () 
{
    return new Column;
}
# pragma endregion