Category : Files from Magazines
Archive   : MICROCAD.ZIP
Filename : SHAPELST.HPP

 
Output of file : SHAPELST.HPP contained in archive : MICROCAD.ZIP
// Figure 11 for "A Little CAD with C++"
// Copyright 1988 Bruce Eckel
// Permission required to distribute source

// file: shapelst.hpp
/* Two classes to manage a list of cadshapes.
A shapelist contains a list of (what else)
shapelist_elements, which simply hold
a cadshape and a link to the next
element. The usual linked list stuff:
you can insert, step through, etc. */
#ifndef SHAPELST_HPP
#define SHAPELST_HPP
#include "cadshape.hpp"

// tell the compiler the class exists:
class shapelist;

class shapelist_element {
cadshape * shp;
shapelist_element * next;
public:
// allow shapelist access to the
// private elements of this class:
friend shapelist;
shapelist_element(cadshape * s,
shapelist_element * hd) {
shp = s;
next = hd;
}
};

class shapelist {
shapelist_element * head, * current;
public:
shapelist() { current = head =
new shapelist_element(
(cadshape *)0, (shapelist_element *)0);
} // end of list marked by null pointers
void insert(cadshape * s) {
shapelist_element * p =
new shapelist_element(s, head);
head = p;
}
void reset() { current = head; }
cadshape * next();
void remove(cadshape * s);
// hunt through the list and find the
// nearest element to x,y:
cadshape * nearest(unsigned x, unsigned y);
};

#endif SHAPELST_HPP


  3 Responses to “Category : Files from Magazines
Archive   : MICROCAD.ZIP
Filename : SHAPELST.HPP

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

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