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implement Tabs;
# pseudo-widget for folder tab selections
#
# Copyright © 1996-1999 Lucent Technologies Inc. All rights reserved.
# Revisions Copyright © 2000-2002 Vita Nuova Holdings Limited. All rights reserved.
#
include "sys.m";
sys: Sys;
include "draw.m";
include "tk.m";
tk: Tk;
include "string.m";
str: String; # could load on demand
include "tabs.m";
TABSXdelta : con 2;
TABSXslant : con 5;
TABSXoff : con 5;
TABSYheight : con 35;
TABSYtop : con 10;
TABSBord : con 1;
init()
{
sys = load Sys Sys->PATH;
tk = load Tk Tk->PATH;
str = load String String->PATH;
}
mktabs(t: ref Tk->Toplevel, dot: string, tabs: array of (string, string), dflt: int): chan of string
{
lab, widg: string;
cmd(t, "canvas "+dot+" -height "+string TABSYheight);
cmd(t, "pack propagate "+dot+" 0");
c := chan of string;
tk->namechan(t, c, dot[1:]);
xpos := 2*TABSXdelta;
ypos := TABSYheight - 3;
back := cmd(t, dot+" cget -background");
dark := "#999999";
light := "#ffffff";
w := 20;
h := 30;
last := "";
for(i := 0; i < len tabs; i++){
(lab, widg) = tabs[i];
tag := "tag" + string i;
sel := "sel" + string i;
xs := xpos;
xpos += TABSXslant + TABSXoff;
v := cmd(t, dot+" create text "+string xpos+" "+string ypos+" -text "+tk->quote(lab)+" -anchor sw -tags "+tag);
bbox := tk->cmd(t, dot+" bbox "+tag);
if(bbox[0] == '!')
break;
(r, nil) := parserect(bbox);
r.max.x += TABSXoff;
x1 := " "+string xs;
x2 := " "+string(xs + TABSXslant);
x3 := " "+string r.max.x;
x4 := " "+string(r.max.x + TABSXslant);
y1 := " "+string(TABSYheight - 2);
y2 := " "+string TABSYtop;
cmd(t, dot+" create polygon " + x1+y1 + x2+y2 + x3+y2 + x4+y1 +
" -fill "+back+" -tags "+tag);
cmd(t, dot+" create line " + x3+y2 + x4+y1 +
" -fill "+dark+" -width 1 -tags "+tag);
cmd(t, dot+" create line " + x1+y1 + x2+y2 + x3+y2 +
" -fill "+light+" -width 1 -tags "+tag);
x1 = " "+string(xs+2);
x4 = " "+string(r.max.x + TABSXslant - 2);
y1 = " "+string(TABSYheight);
cmd(t, dot+" create line " + x1+y1 + x4+y1 +
" -fill "+back+" -width 2 -tags "+sel);
cmd(t, dot+" raise "+v);
cmd(t, dot+" bind "+tag+" <ButtonRelease-1> 'send "+
dot[1:]+" "+string i);
cmd(t, dot+" lower "+tag+" "+last);
last = tag;
xpos = r.max.x;
ww := int cmd(t, widg+" cget -width");
wh := int cmd(t, widg+" cget -height");
if(wh > h)
h = wh;
if(ww > w)
w = ww;
}
xpos += 4*TABSXslant;
if(w < xpos)
w = xpos;
for(i = 0; i < len tabs; i++){
(nil, widg) = tabs[i];
cmd(t, "pack propagate "+widg+" 0");
cmd(t, widg+" configure -width "+string w+" -height "+string h);
}
w += 2*TABSBord;
h += 2*TABSBord + TABSYheight;
cmd(t, dot+" create line 0 "+string TABSYheight+
" "+string w+" "+string TABSYheight+" -width 2 -fill "+light);
cmd(t, dot+" create line 1 "+string TABSYheight+
" 1 "+string(h-1)+" -width 2 -fill "+light);
cmd(t, dot+" create line 0 "+string(h-1)+
" "+string w+" "+string(h-1)+" -width 2 -fill "+dark);
cmd(t, dot+" create line "+string(w-1)+" "+string TABSYheight+
" "+string(w-1)+" "+string(h-1)+" -width 2 -fill "+dark);
cmd(t, dot+" configure -width "+string w+" -height "+string h);
cmd(t, dot+" configure -scrollregion {0 0 "+string w+" "+string h+"}");
tabsctl(t, dot, tabs, -1, string dflt);
return c;
}
tabsctl(t: ref Tk->Toplevel,
dot: string,
tabs: array of (string, string),
id: int,
s: string): int
{
lab, widg: string;
nid := int s;
if(id == nid)
return id;
if(id >= 0){
(lab, widg) = tabs[id];
tag := "tag" + string id;
cmd(t, dot+" lower sel" + string id);
# pos := cmd(t, dot+" coords " + tag);
# if(len pos >= 1 && pos[0] != '!'){
# (p, nil) := parsept(pos);
# cmd(t, dot+" coords "+tag+" "+string(p.x+1)+
# " "+string(p.y+1));
# }
if(id > 0)
cmd(t, dot+" lower "+ tag + " tag"+string (id - 1));
cmd(t, dot+" delete win" + string id);
}
id = nid;
(lab, widg) = tabs[id];
# pos := tk->cmd(t, dot+" coords tag" + string id);
# if(len pos >= 1 && pos[0] != '!'){
# (p, nil) := parsept(pos);
# cmd(t, dot+" coords tag"+string id+" "+string(p.x-1)+" "+string(p.y-1));
# }
cmd(t, dot+" raise tag"+string id);
cmd(t, dot+" raise sel"+string id);
cmd(t, dot+" create window "+string TABSBord+" "+
string(TABSYheight+TABSBord)+" -window "+widg+" -anchor nw -tags win"+string id);
cmd(t, "update");
return id;
}
parsept(s: string): (Draw->Point, string)
{
p: Draw->Point;
(p.x, s) = str->toint(s, 10);
(p.y, s) = str->toint(s, 10);
return (p, s);
}
parserect(s: string): (Draw->Rect, string)
{
r: Draw->Rect;
(r.min, s) = parsept(s);
(r.max, s) = parsept(s);
return (r, s);
}
cmd(top: ref Tk->Toplevel, s: string): string
{
e := tk->cmd(top, s);
if (e != nil && e[0] == '!')
sys->fprint(sys->fildes(2), "%s: tk error %s on [%s]\n", PATH, e, s);
return e;
}
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