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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 2007-2010 - INRIA - Serge Steer <serge.steer@inria.fr>
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
function c=legend(varargin)
if size(varargin)<1 then
error(msprintf(gettext("%s: Wrong number of input argument(s): At least %d expected.\n"), "legend", 1));
end
options_names=["in_upper_right";"in_upper_left";"in_lower_left";
"in_lower_right";"by_coordinates";"out_upper_right";
"out_upper_left";"out_lower_left";"out_lower_right";
"upper_caption";"lower_caption"];
options_codes=[1;2;3;
4;5;-1;
-2;-3;-4;
-5;-6];
f = gcf();
vis = f.immediate_drawing;
vis_on = vis == "on"; // current figure draw status (to decide if drawnow or standby)
narg = size(varargin);
k0 = 1;
H = [];
leg = [];
Acur = gca();
A = Acur;
kopt = 1;
with_box = %T;
coords=[];
if type(varargin(narg))==4 then
with_box=varargin(narg)
narg=narg-1
end
if type(varargin(narg))==1 then
pos=varargin(narg)
if size(pos,"*")==2 then //position given by coordinates
coords=pos;
narg=narg-1
elseif size(pos,"*")==1 then //position given by code
if or(pos==options_codes) then
kopt=find(pos==options_codes)
narg=narg-1
else
error(msprintf(_("%s: Wrong value for input argument #%d: Must be in the set {%s}.\n"),..
"legend",narg,strcat(string(options_codes),",")));
end
else
error(msprintf(_("%s: Wrong size for input argument #%d."),"legend",narg));
end
elseif type(varargin(narg))==10 then
k=find(varargin(narg)==options_names)
if ~isempty(k) then
kopt=k
narg=narg-1
end
end
while type(varargin(k0))==9 then //a handle that could be an Axes, Agreg. or Polyline handle.
tmpH=varargin(k0)
if tmpH.type=="Axes" then
A = tmpH;
end
tmpH=tmpH($:-1:1);
H=[getvalidchildren(tmpH);H];
k0 = k0+1;
end
if H==[] then
//walk subtree to get all proper children
H=getvalidchildren(A)
end
if H==[] then
error(msprintf(_("%s: No ''%s'' handle found.\n"), "legend","Polyline"));
end
//get all labels
for k=k0:narg
if type(varargin(k))<>10 then
break;
end
vk=varargin(k)
leg=[leg; vk(:)]
end
nleg=size(leg,"*")
//upper left coordinates
if ~isempty(coords) then
bnds=get(gca(),"axes_bounds");
as=get(gcf(),"axes_size");
[x1,y1,rect]=xchange(coords(1),coords(2),"f2i")
x1=x1-as(1)*bnds(1)
y1=y1-as(2)*bnds(2)
pos=[x1/(as(1)*bnds(3)), y1/(as(2)*bnds(4))]
kopt=5
elseif kopt==5 then
pos=[]
end
// the number of labels might be lower than the number of polylines
nbLeg = min(size(H, "*"), size(leg, "*"));
first_handle=size(H, "*")-nbLeg+1;
H = H(first_handle:size(H, "*"));
leg = leg(1:nbLeg);
drawlater()
c=captions(H,leg)
if options_codes(kopt)<0 then
c.background=f.background
else
c.background=Acur.background
end
if with_box then c.line_mode="on",else c.line_mode="off",end
c.legend_location=options_names(kopt)
if kopt==5 then
if pos<>[] then
c.position=pos;
else
if vis_on then drawnow(); end // draw if figure status allows it (otherwise standby)
bnds=get(gca(),"axes_bounds");
as=get(gcf(),"axes_size");
while %t
rep=xgetmouse()
if rep(3)<> -1 then break,end
[x1,y1,rect]=xchange(rep(1),rep(2),"f2i")
x1=x1-as(1)*bnds(1)
y1=y1-as(2)*bnds(2)
pos=[x1/(as(1)*bnds(3)), y1/(as(2)*bnds(4))]
c.position=pos;
end
end
end
if vis_on then drawnow(); end // draw if figure status allows it (otherwise standbye)
endfunction
function h=getvalidchildren(A)
h=[]
for k=1:size(A,"*")
a=A(k)
select a.type
case "Polyline" then
h=[h;a]
case "Axes"
ax=a.children
h=[h;getvalidchildren(ax)]
case "Compound"
for k=1:1:size(a.children,"*")
h=[h;getvalidchildren(a.children(k))]
end
end
end
endfunction
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