/*
 *                 GRAPH, Version 1.00 - 4 August 1989
 *
 *            Copyright 1989, David Gay. All Rights Reserved.
 *            This software is freely redistrubatable.
 */

/* User interface routines (windows, menus, requesters, etc) */
#ifndef UIO_H
#define UIO_H

#include "list.h"

#define FONTLEN 30 /* font name length */
#define NBLEN 25
#define INTLEN 11

/* A gadget handler routine, called for every gadget event when a requester is
present */
typedef int gadgevent(struct Gadget *gadg, ULONG class, struct Requester *req,
struct graph *g);

/* All possible commands */
enum commands {none, reqgone, /* internal */
               close, /* window closed */
               /* menu functions */
               _new_graph, _load_graph, _save_graph, print_graph, iff_graph, lo
ad_vars, save_vars, quit,
               limits, axes, zoom, zoom_out, center,
               add_function, add_label,
               edit, improve, del_object, edit_vars
              };

/* Description of selected command, union depends on command */
struct cmd {
    enum commands command;
    struct graph *g;
    union {
        struct function *f;
        struct object *o;
        double zoom_out;
        struct {
            double x0, y0, x1, y1;
        } zoom_in;
        struct {
            double x, y;
        } pt;
    } data;
};

extern tlist flist;                 /* List of available font names */

int make_font_list(void);           /* (Re)make flist */
char *addfont(char *fname);         /* Add/Remove ".font" from font names */
char *remfont(char *fname);

/* Display requester(in graph g), wait for it to leave */
/* handle will be called for every gadget event */
int DoRequest(struct Requester *r, struct graph *g, gadgevent *handle);
/* The default gadget handler (switches between text gadgets) */
int std_ghandler(struct Gadget *gg, ULONG class, struct Requester *req, struct
graph *g);
int getfile(char *file, char *msg);                          /* File requester
*/
struct Requester *abort_request(struct graph *g, char *msg); /* Setup an abort
requester */
void set_abort_msg(struct Requester *req, char *msg);        /* Change abort ms
g */
void end_abort_request(struct Requester *req);               /* Clear abort req
 */
int aborted(struct Requester *req);                          /* Did user abort
? */
void message(struct graph *g, ...);                          /* Display a messa
ge (in a graph) */
void alert(struct Window *win, char *msg1, char *msg2);      /* Use when no gra
ph available */
void nomem(struct Window *win);                              /* Standard no mem
ory alert */

struct cmd next_command(void);      /* Return next selected command */

/* String utility functions, convert numbers to strings */
char *double2str(char *to, double x);
double str2double(char *from);
char *int2str(char *to, int x);
int str2int(char *from);
char *strip(char *name);            /* Strip leading & trailing blanks */

/* Enable/Disable various menus */
void disable_rect_menus(struct graph *g);   /* Menus for 'pos' object */
void enable_rect_menus(struct graph *g);
void disable_object_menus(struct graph *g); /* For selected objects */
void enable_object_menus(struct graph *g);

int init_user(void);
void cleanup_user(void);
int init_uio(struct graph *g);      /* Setup/Cleanup interface for each graph *
/
void cleanup_uio(struct graph *g);

#endif