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/*
* File: gtypes.h
* --------------
* This file defines classes for representing points, dimensions, and
* rectangles.
*/
#ifndef _gtypes_h
#define _gtypes_h
#include <iostream>
#include <string>
/*
* Class: GPoint
* -------------
* This class contains real-valued x and y fields. It is used to
* represent a location on the graphics plane.
*/
class GPoint {
public:
/*
* Constructor: GPoint
* Usage: GPoint origin;
* GPoint pt(x, y);
* -----------------------
* Creates a <code>GPoint</code> object with the specified <code>x</code>
* and <code>y</code> coordinates. If the coordinates are not supplied,
* the default constructor sets these fields to 0.
*/
GPoint();
GPoint(double x, double y);
/*
* Method: getX
* Usage: double x = pt.getX();
* ----------------------------
* Returns the x component of the point.
*/
double getX() const;
/*
* Method: getY
* Usage: double y = pt.getY();
* ----------------------------
* Returns the y component of the point.
*/
double getY() const;
/*
* Method: toString
* Usage: string str = pt.toString();
* ----------------------------------
* Converts the <code>GPoint</code> to a string in the form
* <code>"(</code><i>x</i><code>,</code> <i>y</i><code>)"</code>.
*/
std::string toString() const;
/* Private section */
/**********************************************************************/
/* Note: Everything below this point in this class is logically part */
/* of the implementation and should not be of interest to clients. */
/**********************************************************************/
private:
/* Instance variables */
double x; /* The x-coordinate of the point */
double y; /* The y-coordinate of the point */
/* Friend declarations */
friend bool operator==(const GPoint & p1, const GPoint & p2);
friend bool operator!=(const GPoint & p1, const GPoint & p2);
friend int hashCode(const GPoint & pt);
};
/*
* Class: GDimension
* -----------------
* This class contains real-valued width and height fields. It is used
* to indicate the size of a graphical object.
*/
class GDimension {
public:
/*
* Constructor: GDimension
* Usage: GDimension empty;
* GDimension dim(width, height);
* -------------------------------------
* Creates a <code>GDimension</code> object with the specified
* <code>width</code> and <code>height</code> coordinates. If the
* coordinates are not supplied, the default constructor sets these
* fields to 0.
*/
GDimension();
GDimension(double width, double height);
/*
* Method: getWidth
* Usage: double width = dim.getWidth();
* -------------------------------------
* Returns the width component of the <code>GDimension</code> object.
*/
double getWidth() const;
/*
* Method: getHeight
* Usage: double height = dim.getHeight();
* ---------------------------------------
* Returns the height component of the <code>GDimension</code> object.
*/
double getHeight() const;
/*
* Method: toString
* Usage: string str = dim.toString();
* -----------------------------------
* Converts the <code>GDimension</code> to a string in the form
* <code>"(</code><i>width</i><code>,</code> <i>height</i><code>)"</code>.
*/
std::string toString() const;
/* Private section */
/**********************************************************************/
/* Note: Everything below this point in this class is logically part */
/* of the implementation and should not be of interest to clients. */
/**********************************************************************/
private:
/* Instance variables */
double width; /* The width of the GDimension */
double height; /* The height of the GDimension */
/* Friend declarations */
friend bool operator==(const GDimension & d1, const GDimension & d2);
friend bool operator!=(const GDimension & d1, const GDimension & d2);
friend int hashCode(const GDimension & dim);
};
/*
* Class: GRectangle
* -----------------
* This type contains real-valued x, y, width, and height fields. It is
* used to represent the bounding box of a graphical object.
*/
class GRectangle {
public:
/*
* Constructor: GRectangle
* Usage: GRectangle empty;
* GRectangle r(x, y, width, height);
* -----------------------------------------
* Creates a <code>GRectangle</code> object with the specified components.
* If these parameters are not supplied, the default constructor sets
* these fields to 0.
*/
GRectangle();
GRectangle(double x, double y, double width, double height);
/*
* Method: getX
* Usage: double x = r.getX();
* ---------------------------
* Returns the x component of the rectangle.
*/
double getX() const;
/*
* Method: getY
* Usage: double y = pt.getY();
* ----------------------------
* Returns the y component of the rectangle.
*/
double getY() const;
/*
* Method: getWidth
* Usage: double width = r.getWidth();
* -----------------------------------
* Returns the width component of the rectangle.
*/
double getWidth() const;
/*
* Method: getHeight
* Usage: double height = pt.getHeight();
* --------------------------------------
* Returns the height component of the rectangle.
*/
double getHeight() const;
/*
* Method: isEmpty
* Usage: if (r.isEmpty()) ...
* ---------------------------
* Returns <code>true</code> if the rectangle is empty.
*/
bool isEmpty() const;
/*
* Method: contains
* Usage: if (r.contains(pt)) ...
* if (r.contains(x, y)) ...
* --------------------------------
* Returns <code>true</code> if the rectangle contains the given point,
* which may be specified either as a point or as distinct coordinates.
*/
bool contains(GPoint pt) const;
bool contains(double x, double y) const;
/*
* Method: toString
* Usage: string str = r.toString();
* ---------------------------------
* Converts the <code>GRectangle</code> to a string in the form
* <code>"(</code><i>x</i><code>,</code> <i>y</i><code>,</code>
* <i>width</i><code>,</code> <i>height</i><code>)"</code>.
*/
std::string toString() const;
/* Private section */
/**********************************************************************/
/* Note: Everything below this point in this class is logically part */
/* of the implementation and should not be of interest to clients. */
/**********************************************************************/
private:
/* Instance variables */
double x; /* The x-coordinate of the rectangle */
double y; /* The y-coordinate of the rectangle */
double width; /* The width of the rectangle */
double height; /* The height of the rectangle */
/* Friend declarations */
friend bool operator==(const GRectangle & r1, const GRectangle & r2);
friend bool operator!=(const GRectangle & r1, const GRectangle & r2);
friend int hashCode(const GRectangle & r);
};
/*
* Free functions
* --------------
* This section of the interface defines the insertion, comparison,
* and hashCode functions for the geometric types.
*/
std::ostream & operator<<(std::ostream & os, const GPoint & pt);
bool operator==(const GPoint & p1, const GPoint & p2);
bool operator!=(const GPoint & p1, const GPoint & p2);
int hashCode(const GPoint & pt);
std::ostream & operator<<(std::ostream & os, const GDimension & dim);
bool operator==(const GDimension & d1, const GDimension & d2);
bool operator!=(const GDimension & d1, const GDimension & d2);
int hashCode(const GDimension & dim);
std::ostream & operator<<(std::ostream & os, const GRectangle & rect);
bool operator==(const GRectangle & r1, const GRectangle & r2);
bool operator!=(const GRectangle & r1, const GRectangle & r2);
int hashCode(const GRectangle & r);
#endif
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