C++博客-yaoyaozii-随笔分类-Design Patternhttp://www.cppblog.com/proyao/category/15087.html基础不牢，地动山摇... 急不得...zh-cnMon, 04 Oct 2010 04:37:15 GMTMon, 04 Oct 2010 04:37:15 GMT605.9 Strategyhttp://www.cppblog.com/proyao/archive/2010/10/04/128560.htmlAcaini.yaoyaoziiAcaini.yaoyaoziiMon, 04 Oct 2010 04:27:00 GMThttp://www.cppblog.com/proyao/archive/2010/10/04/128560.htmlhttp://www.cppblog.com/proyao/comments/128560.htmlhttp://www.cppblog.com/proyao/archive/2010/10/04/128560.html#Feedback0http://www.cppblog.com/proyao/comments/commentRss/128560.htmlhttp://www.cppblog.com/proyao/services/trackbacks/128560.html/*
 * 5_9_Strategy.cpp
 *  
 *  Created on: 2010-9-25
 *      Author: wyiu
 */

class Compositor
{
public:
    virtual int compose(Coord natural[], Coord stretch[], Coord shrink[],
                    int componentCount, int lineWidth, int breaks) = 0;

protected:
    Compositor();

};

//------------------------------------------------------------------------
class Composition
{
public:
    Composition(Compositor *);
    void repair();

private:
    Compositor *_compositor;
    Component *_components;
    int _componentCount;
    int _lineWidth;
    int *_lineBreaks;
    int _lineCount;
};

void Composition::repair()
{
    Coord *natural;
    Coord *stretchability;
    Coord *shrinkability;
    int componentCount;
    int *breaks;

    //prepare the arrays with the desired component sizes
    //

    //determine where the breaks are:
    int breakCount;
    breakCount = _compositor->compose(natural, stretchability, shrinkability,
                                        componentCount, _lineWidth, breaks);

    //lay out components according to breaks
    //
}

//--------------------------------------------------------------------
//subclass of Compositor
class SimpleCompositor : public Compositor
{
public:
    SimpleCompositor();

    virtual int compose(Coord natural[], Coord stretch[], Coord shrink[],
                    int componentCount, int lineWidth, int breaks);

    //
};

class TeXCompositor : public Compositor
{
public:
    TeXCompositor();

    virtual int compose(Coord natural[], Coord stretch[], Coord shrink[],
                    int componentCount, int lineWidth, int breaks);

    //
};

class ArrayCompositor : public Compositor
{
public:
    ArrayCompositor();

    virtual int compose(Coord natural[], Coord stretch[], Coord shrink[],
                    int componentCount, int lineWidth, int breaks);

    //
};

//-----------------------------------------
//using example
int main()
{
    //

    Composition *quick = new Composition(new SimpleCompositor);
    Composition *slick = new Composition(new TeXCompositor);
    Composition *iconic = new Composition(new ArrayCompositor);

    //.

    return 0;
}


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