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- // Borland C++ - (C) Copyright 1991 by Borland International
-
- // figures.h contains three classes.
- //
- // Class Location describes screen locations in X and Y
- // coordinates.
- //
- // Class Point describes whether a point is hidden or visible.
- //
- // Class Circle describes the radius of a circle around a point.
- //
- // To use this module, put #include <figures.h> in your main
- // source file and compile the source file FIGURES.CPP together
- // with your main source file.
-
- enum Boolean {false, true};
-
- class Location {
- protected:
- int X;
- int Y;
- public:
- Location(int InitX, int InitY) {X = InitX; Y = InitY;}
- int GetX() {return X;}
- int GetY() {return Y;}
- };
-
- class Point : public Location {
- protected:
- Boolean Visible;
- public:
- Point(int InitX, int InitY);
- virtual void Show(); // Show and Hide are virtual
- virtual void Hide();
- virtual void Drag(int DragBy); // new virtual drag function
- Boolean IsVisible() {return Visible;}
- void MoveTo(int NewX, int NewY);
- };
-
- class Circle : public Point { // Derived from class Point and
- // ultimately from class Location
- protected:
- int Radius;
- public:
- Circle(int InitX, int InitY, int InitRadius);
- void Show();
- void Hide();
- void Expand(int ExpandBy);
- void Contract(int ContractBy);
- };
-
- // prototype of general-purpose, non-member function
- // defined in FIGURES.CPP
-
- Boolean GetDelta(int& DeltaX, int& DeltaY);
-