whitebox.h

ALGAE是一个快速创建算法演示的框架。目前支持的算法实现语言包括java和c

#ifndef WHITEBOX_H
#define WHITEBOX_H

#include <algae/visible.h>

#include <algorithm>
#include <strstream>
#include <vector>


//
//  A WhiteBox is simply a white (and therefore invisible) container
//  of other Visible items.   It forms a convenient way to gather a
//  a group of small visible items into a row or column so that they
//  don't scatter all around the screen.  It can also represent a programming
//  convenience, since by showing/hiding the whitebox, the visibility of all 
//  of the elements added to it can be altered at once.
//  


class WhiteBox : public Visible
{
public:
  WhiteBox (bool vertical = false);

  void add (const Visible* newComponent);
  void add (const Visible& newComponent);
  void remove (Visible* oldComponent);
  
  // 
  //  The usual Visible overrides:
  virtual void touchAllComponents() const;

  virtual void writeText (STD ostream &) const  {}

private:
  vector<const Visible*> contents;

  struct WBsearch 
  {
    const Visible* lookFor;
    
    WBsearch (const Visible* lf): lookFor(lf) {}
    
    bool operator() (const Visible* v) {return v->id() == lookFor->id();}
  };

};


inline WhiteBox::WhiteBox (bool vertical)
  : Visible(AlgAE::White, vertical)
{
}


inline void WhiteBox::add (const Visible* newComponent)
{
  contents.push_back (newComponent);
}

inline void WhiteBox::add (const Visible& newComponent)
{
  contents.push_back (&newComponent);
}



inline void WhiteBox::remove (Visible* oldComponent)
{
  vector<const Visible*>::iterator p
    = find_if(contents.begin(),
	      contents.end(),
	      WBsearch(oldComponent));
  
  if (p != contents.end())
    contents.erase (p);
}

inline void WhiteBox::touchAllComponents() const
{
  for (int i = 0; i < contents.size(); ++i)
    touch (contents[i]);
}

#endif