cc65/samples/mousedemo.c

/*
 * Demo program for mouse usage. Will work for the C64/C128/CBM510/Atari/Apple2
 *
 * Ullrich von Bassewitz, 13.09.2001
 *
 */



#include <stdlib.h>
#include <string.h>
#include <mouse.h>
#include <conio.h>
#include <ctype.h>
#include <dbg.h>



#if defined(__C64__) || defined(__C128__)

/* Address of data for sprite 0 */
#if defined(__C64__)
#  define SPRITE0_DATA  0x0340
#  define SPRITE0_PTR   0x07F8
#elif defined(__C128__)
#  define SPRITE0_DATA  0x0E00
#  define SPRITE0_PTR   0x07F8
#endif

/* The mouse sprite (an arrow) */
static const unsigned char MouseSprite[64] = {
    0x00, 0x00, 0x00,
    0x00, 0x00, 0x00,
    0x00, 0x00, 0x00,
    0x0F, 0xE0, 0x00,
    0x0F, 0xC0, 0x00,
    0x0F, 0x80, 0x00,
    0x0F, 0xC0, 0x00,
    0x0D, 0xE0, 0x00,
    0x08, 0xF0, 0x00,
    0x00, 0x78, 0x00,
    0x00, 0x3C, 0x00,
    0x00, 0x1E, 0x00,
    0x00, 0x0F, 0x00,
    0x00, 0x07, 0x80,
    0x00, 0x03, 0x80,
    0x00, 0x00, 0x00,
    0x00, 0x00, 0x00,
    0x00, 0x00, 0x00,
    0x00, 0x00, 0x00,
    0x00, 0x00, 0x00,
    0x00, 0x00, 0x00,
    0x00
};

#endif  /* __C64__ or __C128__ */


/* Dynamically loaded driver by default */
#ifndef DYN_DRV
#  define DYN_DRV       1
#endif


#define max(a,b)  (((a) > (b)) ? (a) : (b))
#define min(a,b)  (((a) < (b)) ? (a) : (b))



static void CheckError (const char* S, unsigned char Error)
{
    if (Error != MOUSE_ERR_OK) {
        cprintf ("%s: %s(%d)\r\n", S, mouse_geterrormsg (Error), Error);
        exit (EXIT_FAILURE);
    }
}



static void DoWarning (void)
/* Warn the user that a mouse driver is needed for this program */
{
    cprintf ("Warning: This program needs the mouse\r\n"
             "driver with the name\r\n"
             "    %s\r\n"
             "on disk! Press 'y' if you have it or\r\n"
             "any other key to exit.\r\n", mouse_stddrv);
    if (tolower (cgetc ()) != 'y') {
        exit (EXIT_SUCCESS);
    }
    cprintf ("Ok. Please wait patiently...\r\n");
}



static void ShowState (unsigned char Jailed, unsigned char Invisible)
/* Display jail and cursor state */
{
    gotoxy (0, 6);
    cclear (40);
    gotoxy (0, 6);
    cprintf ("Mouse cursor %svisible%s", Invisible? "in" : "", Jailed? ", jailed" : "");
}



int main (void)
{
    struct mouse_info info;
    struct mouse_box full_box;
    struct mouse_box small_box;
    unsigned char Invisible;
    unsigned char Done;
    unsigned char Jailed;

    /* Initialize the debugger */
    DbgInit (0);

    /* Clear the screen, set white on black */
    (void) bordercolor (COLOR_BLACK);
    (void) bgcolor (COLOR_BLACK);
    (void) textcolor (COLOR_GRAY3);
    cursor (0);
    clrscr ();

#if defined(__C64__) || defined(__C128__) || defined(__CBM510__)
    /* Copy the sprite data */
    memcpy ((void*) SPRITE0_DATA, MouseSprite, sizeof (MouseSprite));

    /* Set the VIC sprite pointer */
    *(unsigned char*)SPRITE0_PTR = SPRITE0_DATA / 64;

    /* Set the color of sprite 0 */
#ifdef __CBM510__
    pokebsys ((unsigned) &VIC.spr0_color, COLOR_WHITE);
#else
    VIC.spr0_color = COLOR_WHITE;
#endif

#endif

#if DYN_DRV
    /* Output a warning about the driver that is needed */
    DoWarning ();

    /* Load and install the mouse driver */
    CheckError ("mouse_load_driver",
                mouse_load_driver (&mouse_def_callbacks, mouse_stddrv));
#else
    /* Install the mouse driver */
    CheckError ("mouse_install",
                mouse_install (&mouse_def_callbacks, mouse_static_stddrv));
#endif

    /* Get the initial mouse bounding box */
    mouse_getbox (&full_box);

    /* Print a help line */
    clrscr ();
    revers (1);
    cputsxy (0, 0, "d)ebug  h)ide   q)uit   s)how   j)ail   ");
    revers (0);

    /* Test loop */
    Done = 0;
    Jailed = 0;
    Invisible = 1;
    ShowState (Jailed, Invisible);
    while (!Done) {

        /* Get the current mouse coordinates and button states and print them */
        mouse_info (&info);
        gotoxy (0, 2);
        cprintf ("X  = %3d", info.pos.x);
        gotoxy (0, 3);
        cprintf ("Y  = %3d", info.pos.y);
        gotoxy (0, 4);
        cprintf ("LB = %c", (info.buttons & MOUSE_BTN_LEFT)? '1' : '0');
        gotoxy (0, 5);
        cprintf ("RB = %c", (info.buttons & MOUSE_BTN_RIGHT)? '1' : '0');

        /* Handle user input */
        if (kbhit ()) {
            switch (tolower (cgetc ())) {

                case 'd':
                    BREAK();
                    break;

                case 'h':
                    ShowState (Jailed, ++Invisible);
                    mouse_hide ();
                    break;

                case 'j':
                    if (Jailed) {
                        Jailed = 0;
                        mouse_setbox (&full_box);
                    } else {
                        Jailed = 1;
                        small_box.minx = max (info.pos.x - 10, full_box.minx);
                        small_box.miny = max (info.pos.y - 10, full_box.miny);
                        small_box.maxx = min (info.pos.x + 10, full_box.maxx);
                        small_box.maxy = min (info.pos.y + 10, full_box.maxy);
                        mouse_setbox (&small_box);
                    }
                    ShowState (Jailed, Invisible);
                    break;

                case 's':
                    if (Invisible) {
                        ShowState (Jailed, --Invisible);
                        mouse_show ();
                    }
                    break;

                case 'q':
                    Done = 1;
                    break;
            }
        }

    }

#if DYN_DRV
    /* Uninstall and unload the mouse driver */
    CheckError ("mouse_unload", mouse_unload ());
#else
    /* Uninstall the mouse driver */
    CheckError ("mouse_uninstall", mouse_uninstall ());
#endif

    /* Say goodbye */
    clrscr ();
    cputs ("Goodbye!\r\n");

    return EXIT_SUCCESS;
}