#ifndef GLUTWIN_H
#define GLUTWIN_H

#include <stdlib.h>
#include <GL/glut.h>
#include <string>

// pick something not in GLUT_LEFT_BUTTON, GLUT_RIGHT_BUTTON, etc
#define GLUTWIN_SUBMENU (13)

class GlutWin;

typedef struct WindowPair_s{
  GlutWin *glutwin;
  int      glWindowNum;
  WindowPair_s *next;
} WindowPair;

class GlutWin 
{

public:  /*private*/
  static WindowPair *windowList;   // A list of all windows open
  static GlutWin *containerWindow; // The parent of the next window,
				   // we open, -1 = root

public:
  std::string windowTitle;
  int glWindowNum;
  int height, width;
  GlutWin *parentWindow; // -1 at root, else this is subwindow
  int leftbuttonstate, middlebuttonstate, rightbuttonstate;
  int keyModifiers;
  int menuID[3]; // Left,middle,right menus if present
  
  long idleInterval;  // interval in milliseconds between idle calls
  long nextIdleTime;  // The time we should get our next call

public:
  GlutWin();
  virtual ~GlutWin();
  
  void setIdleInterval(int interval); // In milliseconds

  // Menu handling routines
  void activateMenu(int whichMenu);
  void deactivateMenu(int whichMenu);
  int  getMenuID(int whichMenu);
  int  addSubMenu(char *name);

  // window management
  virtual void setWindowTitle(char *name);
  
  virtual void idle();
  virtual void display();
  virtual void reshape(int height, int width);
  virtual void mouse(int button, int state, int x, int y);
  virtual void keyboard(unsigned char key, int x, int y);
  virtual void motion(int x, int y);
  virtual void menu(int whichMenu, int value);
};

// Next window constructed is subwindow of default or given window
void glutWinSubWindow(GlutWin * winNum = NULL);

// Next window constructed is at root level
void glutWinMainWindow();


// Private - stubs that figure how to call the right object
void glutWinIdle();
void glutWinTimer(int value);
GlutWin *getGlutWin(int glWindowNum);
void glutWinDisplay();
void glutWinReshape(int height, int width);
void glutWinMouse(int button, int state, int x, int y);
void glutWinKeyboard(unsigned char key, int x, int y);
void glutWinMotion(int x, int y);
void glutWinMenu(int value);
#endif