设计模式之 组合模式

class Graph
{
public:
    Graph(void);
    virtual ~Graph(void);
public:
    virtual void bounds(const Rect&);
    virtual void draw(void);
    virtual void intersects(const Point &point);
    virtual void insert(Graph *graph);
    virtual Graph* getParent(void){ return NULL; }
};

class Rectangle : public Graph
{
public:
    Rectangle(void);
    ~Rectangle(void);
public:
    virtual void bounds(const Rect&);
    virtual void draw(void);
    virtual void intersects(const Point &point);
};

class Composition: public Graph
{
public:
    Composition(void);
    virtual ~Composition(void);

public:
    virtual void draw(void);
    virtual void insert(Graph *graph);

protected:
    vector<Graph*> graphList_;
    vector<Compositor*> compositor_;
};

class Compositor
{
public:
    Compositor(void);
    virtual ~Compositor(void);
public:
    void setComposition(Composition *pCom);
    virtual void compose(void);
};

class TextCompositor: public Compositior
{
public:
    TextCompositor(void);
    ~TextCompositor(void);
public:
    virtual void compose(void);
};