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implement Popup;
include "sys.m";
sys: Sys;
include "draw.m";
Point: import Draw;
include "tk.m";
tk: Tk;
include "popup.m";
init()
{
sys = load Sys Sys->PATH;
tk = load Tk Tk->PATH;
}
post(win: ref Tk->Toplevel, p: Point, a: array of string, n: int): chan of int
{
rc := chan of int;
spawn postproc(win, p, a, n, rc);
return rc;
}
postproc(win: ref Tk->Toplevel, p: Point, a: array of string, n: int, rc: chan of int)
{
c := chan of string;
tk->namechan(win, c, "c.popup");
mkpopupmenu(win, a);
cmd(win, ".popup entryconfigure " + string n + " -state active");
cmd(win, "bind .popup <Unmap> {send c.popup unmap}");
dy := ypos(win, n) - ypos(win, 0);
p.y -= dy;
cmd(win, ".popup post " + string p.x + " " + string p.y +
";grab set .popup");
n = -1;
while ((e := <-c) != "unmap")
n = int e;
cmd(win, "destroy .popup");
rc <-= n;
}
mkpopupmenu(win: ref Tk->Toplevel, a: array of string)
{
cmd(win, "menu .popup");
for (i := 0; i < len a; i++) {
cmd(win, ".popup add command -command {send c.popup " + string i +
"} -text '" + a[i]);
}
}
Blank: con "-----";
# XXX what should we do about popups containing no items.
mkbutton(win: ref Tk->Toplevel, w: string, a: array of string, n: int): chan of string
{
c := chan of string;
if (len a == 0) {
cmd(win, "label " + w + " -bd 2 -relief raised -text '" + Blank);
return c;
}
tk->namechan(win, c, "c" + w);
mkpopupmenu(win, a);
cmd(win, "label " + w + " -bd 2 -relief raised -width [.popup cget -width] -text '" + a[n]);
cmd(win, "bind " + w + " <Button-1> {send c" + w + " " + w + "}");
cmd(win, "destroy .popup");
return c;
}
changebutton(win: ref Tk->Toplevel, w: string, a: array of string, n: int)
{
if (len a > 0) {
mkpopupmenu(win, a);
cmd(win, w + " configure -width [.popup cget -width] -text '" + a[n]);
cmd(win, "bind " + w + " <Button-1> {send c" + w + " " + w + "}");
cmd(win, "destroy .popup");
} else {
cmd(win, w + " configure -text '" + Blank);
cmd(win, "bind " + w + " <Button-1> {}");
}
}
add(a: array of string, s: string): (array of string, int)
{
for (i := 0; i < len a; i++)
if (s == a[i])
return (a, i);
na := array[len a + 1] of string;
na[0:] = a;
na[len a] = s;
return (na, len a);
}
#event(win: ref Tk->Toplevel, e: string, a: array of string): int
#{
# w := e;
# p := Point(int cmd(win, w + " cget -actx"), int cmd(win, w + " cget -acty"));
# s := cmd(win, w + " cget -text");
# for (i := 0; i < len a; i++)
# if (s == a[i])
# break;
# if (i == len a)
# i = 0;
#
# n := post(win, p, a, i);
# if (n != -1) {
# cmd(win, w + " configure -text '" + a[n]);
# i = n;
# }
# return i;
#}
ypos(win: ref Tk->Toplevel, n: int): int
{
return int cmd(win, ".popup yposition " + string n);
}
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;
}
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