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implement Colors;
include "sys.m";
sys: Sys;
include "draw.m";
draw: Draw;
Display, Point, Rect, Image: import draw;
include "tk.m";
tk: Tk;
include "tkclient.m";
tkclient: Tkclient;
Colors: module {
init: fn(ctxt: ref Draw->Context, argv: list of string);
};
display: ref Display;
top: ref Tk->Toplevel;
tmpi: ref Image;
task_cfg := array[] of {
"panel .c",
"label .l -anchor w -text {col:}",
"pack .l -fill x",
"pack .c -fill both -expand 1",
"bind .c <Button-1> {grab set .c; send cmd %X %Y}",
"bind .c <ButtonRelease-1> {grab release .c}",
};
init(ctxt: ref Draw->Context, nil: list of string)
{
spawn init1(ctxt);
}
init1(ctxt: ref Draw->Context)
{
sys = load Sys Sys->PATH;
draw = load Draw Draw->PATH;
tk = load Tk Tk->PATH;
tkclient = load Tkclient Tkclient->PATH;
tkclient->init();
display = ctxt.display;
tmpi = display.newimage(((0,0), (1, 1)), Draw->RGB24, 0, 0);
titlectl: chan of string;
(top, titlectl) = tkclient->toplevel(ctxt, "", "Colors", Tkclient->Appl);
cmdch := chan of string;
tk->namechan(top, cmdch, "cmd");
for (i := 0; i < len task_cfg; i++)
cmd(top, task_cfg[i]);
tk->putimage(top, ".c", cmap((256, 256)), nil);
cmd(top, "pack propagate . 0");
cmd(top, "update");
tkclient->onscreen(top, nil);
tkclient->startinput(top, "kbd"::"ptr"::nil);
for(;;) alt {
s := <-top.ctxt.kbd =>
tk->keyboard(top, s);
s := <-top.ctxt.ptr =>
tk->pointer(top, *s);
c := <-top.ctxt.ctl or
c = <-top.wreq or
c = <-titlectl =>
if(c == "exit")
return;
e := tkclient->wmctl(top, c);
if(e == nil && c[0] == '!'){
tk->putimage(top, ".c", cmap(actr(".c").size()), nil);
cmd(top, "update");
}
press := <-cmdch =>
(nil, toks) := sys->tokenize(press, " ");
color((int hd toks, int hd tl toks));
}
}
color(p: Point)
{
r, g, b: int;
col: string;
cr := actr(".c");
if(p.in(cr)){
p = p.sub(cr.min);
p.x = (16*p.x)/cr.dx();
p.y = (16*p.y)/cr.dy();
(r, g, b) = display.cmap2rgb(16*p.y+p.x);
col = string (16*p.y+p.x);
}else{
tmpi.draw(tmpi.r, display.image, nil, p);
data := array[3] of byte;
ok := tmpi.readpixels(tmpi.r, data);
if(ok != len data)
return;
(r, g, b) = (int data[2], int data[1], int data[0]);
c := display.rgb2cmap(r, g, b);
(r1, g1, b1) := display.cmap2rgb(c);
if (r == r1 && g == g1 && b == b1)
col = string c;
else
col = "~" + string c;
}
cmd(top, ".l configure -text " +
sys->sprint("{col:%s #%.6X r%d g%d b%d}", col, (r<<16)|(g<<8)|b, r, g, b));
cmd(top, "update");
}
cmap(size: Point): ref Image
{
# use writepixels because it's much faster than allocating all those colors.
img := display.newimage(((0, 0), size), Draw->CMAP8, 0, 0);
if (img == nil){
sys->print("colors: cannot make new image: %r\n");
return nil;
}
dy := (size.y / 16 + 1);
buf := array[size.x * dy] of byte;
for(y:=0; y<16; y++){
for (i := 0; i < size.x; i++)
buf[i] = byte (16*y + (16*i)/size.x);
for (i = 1; i < dy; i++)
buf[size.x*i:] = buf[0:size.x];
img.writepixels(((0, (y*size.y)/16), (size.x, ((y+1)*size.y) / 16)), buf);
}
return img;
}
actr(w: string): Rect
{
r: Rect;
bd := int cmd(top, w + " cget -bd");
r.min.x = int cmd(top, w + " cget -actx") + bd;
r.min.y = int cmd(top, w + " cget -acty") + bd;
r.max.x = r.min.x + int cmd(top, w + " cget -actwidth");
r.max.y = r.min.y + int cmd(top, w + " cget -actheight");
return r;
}
cmd(top: ref Tk->Toplevel, cmd: string): string
{
e := tk->cmd(top, cmd);
if (e != nil && e[0] == '!')
sys->print("colors: tk error on '%s': %s\n", cmd, e);
return e;
}
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