ref: 42dfac6916ebbdac65cbec8b3e1a80c3ee41423c
dir: /appl/wm/coffee.b/
implement Coffee;
include "sys.m";
sys: Sys;
include "draw.m";
draw: Draw;
Context, Display, Point, Rect, Image, Screen: import draw;
include "tk.m";
tk: Tk;
Toplevel: import tk;
include "tkclient.m";
tkclient: Tkclient;
Coffee: module
{
init: fn(ctxt: ref Context, argv: list of string);
};
display: ref Display;
t: ref Toplevel;
NC: con 6;
task_cfg := array[] of {
"frame .f",
"frame .b",
"button .b.Stop -text Stop -command {send cmd stop}",
"scale .b.Rate -from 1 -to 10 -orient horizontal"+
" -showvalue 0 -command {send cmd rate}",
"scale .b.Jitter -from 0 -to 5 -orient horizontal"+
" -showvalue 0 -command {send cmd jitter}",
"scale .b.Skip -from 0 -to 25 -orient horizontal"+
" -showvalue 0 -command {send cmd skip}",
".b.Rate set 3",
".b.Jitter set 2",
".b.Skip set 5",
"pack .b.Stop .b.Rate .b.Jitter .b.Skip -side left",
"pack .b -anchor w",
"pack .f -side bottom -fill both -expand 1",
};
init(ctxt: ref Context, nil: list of string)
{
sys = load Sys Sys->PATH;
draw = load Draw Draw->PATH;
tk = load Tk Tk->PATH;
tkclient = load Tkclient Tkclient->PATH;
sys->pctl(Sys->NEWPGRP, nil);
tkclient->init();
if(ctxt == nil)
ctxt = tkclient->makedrawcontext();
display = ctxt.display;
menubut: chan of string;
(t, menubut) = tkclient->toplevel(ctxt, "", "Infernal Coffee", 0);
cmdch := chan of string;
tk->namechan(t, cmdch, "cmd");
for (i := 0; i < len task_cfg; i++)
cmd(t, task_cfg[i]);
tk->cmd(t, "update");
tkclient->startinput(t, "ptr"::"kbd"::nil);
tkclient->onscreen(t, nil);
ctl := chan of (string, int, int);
spawn animate(ctl);
for(;;) alt {
s := <-t.ctxt.kbd =>
tk->keyboard(t, s);
s := <-t.ctxt.ptr =>
tk->pointer(t, *s);
s := <-t.ctxt.ctl or
s = <-t.wreq or
s = <-menubut =>
tkclient->wmctl(t, s);
press := <-cmdch =>
(nil, word) := sys->tokenize(press, " ");
case hd word {
"stop" or "go" =>
ctl <-= (hd word, 0, 0);
"rate" or "jitter" or "skip" =>
ctl <-= (hd word, int hd tl word, 0);
}
}
}
animate(ctl: chan of (string, int, int))
{
stopped := 0;
fill := display.open("/icons/bigdelight.bit");
if (fill == nil) {
sys->fprint(sys->fildes(2), "coffee: failed to allocate image\n");
exit;
}
c := array[NC] of ref Image;
m := array[NC] of ref Image;
for(i:=0; i<NC; i++){
c[i] = display.open("/icons/coffee"+string i+".bit");
m[i] = display.open("/icons/coffee"+string i+".mask");
if (c[i] == nil || m[i] == nil) {
sys->fprint(sys->fildes(2), "coffee: failed to allocate image\n");
exit;
}
}
r := Rect((0, 0), (400, 300));
buffer := display.newimage(r, t.image.chans, 0, Draw->Black);
if (buffer == nil) {
sys->fprint(sys->fildes(2), "coffee: failed to allocate image\n");
exit;
}
cmd(t, "panel .f.p -bd 3 -relief flat");
cmd(t, "pack .f.p -fill both -expand 1");
cmd(t, "update");
# org := buffer.r.min;
tk->putimage(t, ".f.p", buffer, nil);
rate := 3;
jitter := 2;
skip := 5;
i = 0;
for(k:=0; ; k++){
sys->sleep(1);
if(k%25 > 25-skip)
i -= rate;
else
i += rate;
buffer.draw(buffer.clipr, fill, nil, fill.r.min);
center := buffer.r.max.div(2);
for(j:=0; j<NC; j++){
(sin, cos) := sincos(i+j*(360/NC));
x := (sin*150)/1000 + jitter*(k%5);
y := (cos*100)/1000 + jitter*(k%5);
p0 := center.add((x-c[j].r.dx()/2, y-c[j].r.dy()/2));
buffer.draw(c[j].r.addpt(p0), c[j], m[j], (0,0));
if(j & 1) # be nice from time to time
sys->sleep(0);
}
tk->cmd(t, ".f.p dirty; update");
sys->sleep(5);
alt{
(cmd, i0, i1) := <-ctl =>
Pause:
for(;;){
case cmd{
"go" =>
if(stopped){
tk->cmd(t, ".b.Stop configure -text Stop -command {send cmd stop}");
tk->cmd(t, "update");
stopped = 0;
}
break Pause;
"stop" =>
if(!stopped){
tk->cmd(t, ".b.Stop configure -text { Go } -command {send cmd go}");
tk->cmd(t, "update");
stopped = 1;
}
"rate" =>
rate = i0;
if(stopped == 0)
break Pause;
"jitter" =>
jitter = i0;
if(stopped == 0)
break Pause;
"skip" =>
skip = i0;
if(stopped == 0)
break Pause;
}
(cmd, i0, i1) = <-ctl;
}
* =>
;
}
}
}
sintab := array[] of {
0000, 0017, 0035, 0052, 0070, 0087, 0105, 0122, 0139, 0156,
0174, 0191, 0208, 0225, 0242, 0259, 0276, 0292, 0309, 0326,
0342, 0358, 0375, 0391, 0407, 0423, 0438, 0454, 0469, 0485,
0500, 0515, 0530, 0545, 0559, 0574, 0588, 0602, 0616, 0629,
0643, 0656, 0669, 0682, 0695, 0707, 0719, 0731, 0743, 0755,
0766, 0777, 0788, 0799, 0809, 0819, 0829, 0839, 0848, 0857,
0866, 0875, 0883, 0891, 0899, 0906, 0914, 0921, 0927, 0934,
0940, 0946, 0951, 0956, 0961, 0966, 0970, 0974, 0978, 0982,
0985, 0988, 0990, 0993, 0995, 0996, 0998, 0999, 0999, 1000,
1000, };
sincos(a: int): (int, int)
{
a %= 360;
if(a < 0)
a += 360;
if(a <= 90)
return (sintab[a], sintab[90-a]);
if(a <= 180)
return (sintab[180-a], -sintab[a-90]);
if(a <= 270)
return (-sintab[a-180], -sintab[270-a]);
return (-sintab[360-a], sintab[a-270]);
}
cmd(win: ref Tk->Toplevel, s: string): string
{
r := tk->cmd(win, s);
if (len r > 0 && r[0] == '!') {
sys->print("error executing '%s': %s\n", s, r[1:]);
}
return r;
}