void
drawline (
int dx,
int dy /* endpoint is (hpos+dx, vpos+dy) */
)
{
/*
*
* Draws a line from (hpos, vpos) to (hpos+dx, vpos+dy), and leaves the current
* position at the endpoint.
*
*/
if ( dx == 0 && dy == 0 )
drawcirc(1, 'c');
else fprintf(tf, "%d %d %d %d Dl\n", hpos + dx, vpos + dy, hpos, vpos);
hgoto(hpos+dx); /* where troff expects to be */
vgoto(vpos+dy);
resetpos(); /* not sure where the printer is */
} /* End of drawline */
int main()
{
int win;
int cnt;
float x_cen = X_CEN;
float y_cen = Y_CEN;
win = gopen(WIDTH,HEIGHT);
puts("Move your mouse cursor on the window :-)");
/* レイヤの設定をする */
layer(win, 0,1);
/* ノンブロックモードにする */
gsetnonblock(ENABLE);
cnt = 0;
while ( 1 ) {
int win_ev; /* イベントのあったウィンドゥ番号 */
int type, b; /* イベントのタイプ，ボタン */
float r, x, y;
win_ev = ggetevent(&type,&b,&x,&y) ;
if ( win_ev == win ) {
if ( type == MotionNotify ){
x_cen = x;
y_cen = y;
}
else if ( type == ButtonPress ) {
break;
}
}
else {
int i;
if ( CNT_MAX <= cnt ) cnt = 0;
gclr(win);
for ( i=0 ; i < 4 ; i++ ) {
r = pow((cnt+i*(CNT_MAX/4)) % CNT_MAX, 2)/DIV;
drawcirc(win,x_cen,y_cen,r,r);
}
copylayer(win, 1,0);
msleep(20);
cnt++;
}
}
gclose(win);
return(0);
}
void
conv(register FILE *fp)
{
register int c, k;
int m, n, n1, m1;
char str[4096], buf[4096];
while ((c = getc(fp)) != EOF) {
switch (c) {
case '\n': /* when input is text */
case ' ':
case 0: /* occasional noise creeps in */
break;
case '{': /* push down current environment */
t_push();
break;
case '}':
t_pop();
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
/* two motion digits plus a character */
hmot((c-'0')*10 + getc(fp)-'0');
put1(getc(fp));
break;
case 'c': /* single ascii character */
put1(getc(fp));
break;
case 'C':
sget(str, sizeof str, fp);
put1s(str);
break;
case 't': /* straight text */
fgets(buf, sizeof(buf), fp);
t_text(buf);
break;
case 'D': /* draw function */
fgets(buf, sizeof(buf), fp);
switch (buf[0]) {
case 'l': /* draw a line */
sscanf(buf+1, "%d %d", &n, &m);
drawline(n, m, ".");
break;
case 'c': /* circle */
sscanf(buf+1, "%d", &n);
drawcirc(n);
break;
case 'e': /* ellipse */
sscanf(buf+1, "%d %d", &m, &n);
drawellip(m, n);
break;
case 'a': /* arc */
sscanf(buf+1, "%d %d %d %d", &n, &m, &n1, &m1);
drawarc(n, m, n1, m1);
break;
case '~': /* wiggly line */
drawwig(buf+1);
break;
default:
error(FATAL, "unknown drawing function %s\n", buf);
break;
}
break;
case 's':
fscanf(fp, "%d", &n);
if (n == -23) {
float f;
fscanf(fp, "%f", &f);
setsize(f);
} else
setsize(t_size(n));/* ignore fractional sizes */
break;
case 'f':
sget(str, sizeof str, fp);
setfont(t_font(str));
break;
case 'H': /* absolute horizontal motion */
/* fscanf(fp, "%d", &n); */
while ((c = getc(fp)) == ' ')
;
k = 0;
do {
k = 10 * k + c - '0';
} while (isdigit(c = getc(fp)));
ungetc(c, fp);
hgoto(k);
break;
case 'h': /* relative horizontal motion */
/* fscanf(fp, "%d", &n); */
while ((c = getc(fp)) == ' ')
;
k = 0;
do {
k = 10 * k + c - '0';
} while (isdigit(c = getc(fp)));
ungetc(c, fp);
hmot(k);
break;
case 'w': /* word space */
putc(' ', stdout);
break;
case 'V':
fscanf(fp, "%d", &n);
vgoto(n);
break;
case 'v':
fscanf(fp, "%d", &n);
vmot(n);
break;
case 'p': /* new page */
fscanf(fp, "%d", &n);
t_page(n);
break;
case 'n': /* end of line */
while (getc(fp) != '\n')
;
t_newline();
break;
case '#': /* comment */
while (getc(fp) != '\n')
;
break;
case 'x': /* device control */
devcntrl(fp);
break;
default:
error(!FATAL, "unknown input character %o %c\n", c, c);
done();
}
}
}