line.h

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#ifndef IIS_LINE_H
#define IIS_LINE_H
#include "value.h"
#include "point.h"
#include "image-dialog.h"

class LineValue: public Value
{
 public:
  PointValue a;
  PointValue b;
  virtual QString toString();
  double dx() {return b.x-a.x;};
  double dy() {return b.y-a.y;};
  LineValue()
    {
    };
  LineValue(Token data) : 
    a((Token)data["a"]),
    b((Token)data["b"])
     {
     }
  virtual Data getSaveDescription(QString prefix) 
    {
      Token r;
      r["type"]=Symbol("line");
      r["a"]=a.getSaveDescription(prefix);
      r["b"]=b.getSaveDescription(prefix);
      return r;
    };
 protected:
  virtual bool equals_same_type(Value * other);
};

class LinePicker: public ImagePicker
{
    LineValue line;
    bool first;
 public:
    LinePicker(ImageValue * I): ImagePicker(I), first(true) {};
    virtual Value * value() {return new LineValue(line);};
    virtual void nextPoint(PointValue point, bool right);
};

#endif

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