/* ARGSUSED */
static void draw_it (
XtPointer client_data,
XtIntervalId *id) /* unused */
{
EyesWidget w = (EyesWidget)client_data;
Window rep_root, rep_child;
int rep_rootx, rep_rooty;
unsigned int rep_mask;
int dx, dy;
TPoint mouse;
Display *dpy = XtDisplay (w);
Window win = XtWindow (w);
TPoint newpupil[2];
XPoint xnewpupil, xpupil;
if (XtIsRealized((Widget)w)) {
XQueryPointer (dpy, win, &rep_root, &rep_child,
&rep_rootx, &rep_rooty, &dx, &dy, &rep_mask);
mouse.x = Tx(dx, dy, &w->eyes.t);
mouse.y = Ty(dx, dy, &w->eyes.t);
if (!TPointEqual (mouse, w->eyes.mouse)) {
computePupils (mouse, newpupil);
xpupil.x = Xx(w->eyes.pupil[0].x, w->eyes.pupil[0].y, &w->eyes.t);
xpupil.y = Xy(w->eyes.pupil[0].x, w->eyes.pupil[0].y, &w->eyes.t);
xnewpupil.x = Xx(newpupil[0].x, newpupil[0].y, &w->eyes.t);
xnewpupil.y = Xy(newpupil[0].x, newpupil[0].y, &w->eyes.t);
if (!XPointEqual (xpupil, xnewpupil)) {
if (w->eyes.pupil[0].x != -1000 || w->eyes.pupil[0].y != -1000)
eyeBall (w, w->eyes.centerGC, 0);
w->eyes.pupil[0] = newpupil[0];
eyeBall (w, w->eyes.pupGC, 0);
}
xpupil.x = Xx(w->eyes.pupil[1].x, w->eyes.pupil[1].y, &w->eyes.t);
xpupil.y = Xy(w->eyes.pupil[1].x, w->eyes.pupil[1].y, &w->eyes.t);
xnewpupil.x = Xx(newpupil[1].x, newpupil[1].y, &w->eyes.t);
xnewpupil.y = Xy(newpupil[1].x, newpupil[1].y, &w->eyes.t);
if (!XPointEqual (xpupil, xnewpupil)) {
if (w->eyes.pupil[1].x != -1 || w->eyes.pupil[1].y != -1)
eyeBall (w, w->eyes.centerGC, 1);
w->eyes.pupil[1] = newpupil[1];
eyeBall (w, w->eyes.pupGC, 1);
}
w->eyes.mouse = mouse;
w->eyes.update = 0;
} else {
if (delays[w->eyes.update + 1] != 0)
++w->eyes.update;
}
}
w->eyes.interval_id =
XtAppAddTimeOut(XtWidgetToApplicationContext((Widget) w),
delays[w->eyes.update], draw_it, (XtPointer)w);
} /* draw_it */
static void
drawEyes(EyesWidget w, TPoint mouse)
{
TPoint newpupil[2];
int num;
if (TPointEqual (mouse, w->eyes.mouse)) {
if (delays[w->eyes.update + 1] != 0)
++w->eyes.update;
return;
}
computePupils (w, mouse, newpupil);
for (num = 0; num < 2; num ++) {
drawEye(w, newpupil[num], num);
}
w->eyes.mouse = mouse;
w->eyes.update = 0;
}
static void
paint_eyes(ModeInfo * mi, Eyes * e, Fly * f, Eyes * eyes, int num_eyes)
{
EyeScrInfo *ep = &eye_info[MI_SCREEN(mi)];
Display *display = MI_DISPLAY(mi);
Window window = MI_WINDOW(mi);
GC gc = ep->eyeGC;
Bool iconic = MI_IS_ICONIC(mi);
int focusx = (f->x + (f->width / 2)) - e->x;
int focusy = (f->y + (f->height / 2)) - e->y;
Pixmap pix = e->pixmap;
TPoint point;
int i;
if (pix == None) {
e->time_to_die = 0; /* "should not happen" */
}
if (ep->time >= e->time_to_die) {
/* Sorry Bud, your time is up */
if (e->painted) {
/* only unpaint it if previously painted */
XSetForeground(display, gc, MI_BLACK_PIXEL(mi));
XFillRectangle(display, window, gc, e->x, e->y, e->width, e->height);
}
/* randomly place the eyes elsewhere */
create_eyes(mi, e, eyes, num_eyes);
pix = e->pixmap; /* pixmap may have changed */
}
/* If the bouncer would intersect this pair of eyes, force the
* eyes to move. This simplifies the code, because we do not
* have to deal with drawing the bouncer on top of the eyes.
* When trying to do so, there was too much annoying flashing
* and ghost images from the undraw. I decided to observe the
* KISS principle and keep it simple. I think the effect is
* better also.
* We must draw the flyer on the eyes when iconic, but that is
* easy because the eyes repaint the whole box each time.
*/
if ((!iconic) && (fly_touches_eye(f, e))) {
e->time_to_die = 0;
}
if (e->time_to_die == 0) {
return; /* collides with something */
}
/* set the point to look at and compute the pupil position */
point.x = Tx(focusx, focusy, &e->transform);
point.y = Ty(focusx, focusy, &e->transform);
computePupil(0, point, &(e->pupil[0]));
computePupil(1, point, &(e->pupil[1]));
if (e->painted) {
/* if still looking at the same point, do nothing further */
if (TPointEqual(e->pupil[0], e->last_pupil[0]) &&
TPointEqual(e->pupil[1], e->last_pupil[1])) {
return;
}
}
for (i = 0; i < 2; i++) {
/* update the eye, calculates the changed rectangle */
make_eye(mi, pix, e, i, False);
/* Only blit the change if the full image has been painted */
if (e->painted) {
/* copy the changed rectangle out to the screen */
XCopyArea(display, pix, window, gc,
e->bbox.x, e->bbox.y,
(int) e->bbox.width, (int) e->bbox.height,
e->x + e->bbox.x, e->y + e->bbox.y);
}
/* remember where we're looking, for the next time around */
e->last_pupil[i] = e->pupil[i];
}
/* always do full paint when iconic, eliminates need to track fly */
if (iconic || (!e->painted)) {
XCopyArea(display, pix, window, gc, 0, 0,
e->width, e->height, e->x, e->y);
}
/* when iconic, pretend to never paint, causes full paint each time */
if (!iconic) {
e->painted++; /* note that a paint has been done */
}
}
