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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) INRIA
//
// 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 legends(leg, style, opt, with_box, font_size )
//
// PURPOSE
// draw legends on a plot
// AUTHORS
// F. Delebecque + slight modif from B. Pincon
// modified again by Eric Dubois and Jean-Baptiste Silvy 18/01/07
rhs=argn(2)
if rhs < 2 then
error(msprintf(gettext("%s: Wrong number of input arguments: At least %d expected.\n"), "legends", 2));
end
if type(leg) ~= 10 then,
error(msprintf(gettext("%s: Wrong type for input argument #%d: String array expected.\n"), "legends", 1));
end
nleg=size(leg,"*")
if type(style) ~= 1 & type(style) ~= 9 then
error(msprintf(gettext("%s: Wrong type for input argument #%d: Real array or graphic handle array expected.\n"), "legends", 2));
end
if ~exists("opt","local") then
opt=5
elseif typeof(opt)=="string" then
select opt
case "ur" then, opt=1,
case "ul" then, opt=2,
case "ll" then, opt=3,
case "lr" then, opt=4,
case "?" then, opt=5,
case "below" then, opt=6,
else
error(msprintf(gettext("%s: Wrong value for input argument #%d: ''%s'', ''%s'', ''%s'', ''%s'', ''%s'' or ''%s'' expected.\n"),"legends", 3, "ur", "ul", "ll", "lr", "?", "below"));
end
end
if ~exists("with_box","local") then, with_box=%t, end
if ~exists("font_size","local") then
font_size = 1 ; // default size
end
ns=size(style)
if ns ~= [2 1] & or(ns==1) then, style=matrix(style,1,-1),end
ns=size(style,2)
//preserve current graphic context
f=gcf()
vis=f.immediate_drawing;
old_ax=gca(),
arect=old_ax.margins;
r1=old_ax.axes_bounds;
//create small axes on the top left corner (the axes is chosen very
//small to avoid it can be selected for rotation in new graphic mode
//case (a little tricky)
xsetech(wrect=[r1(1),r1(2),r1(3)/1000,r1(4)/1000],frect=[0 0 1,1]/1000,arect=[0,0,0,0])
xmin=arect(1);xmax=1-arect(2);ymin=-1+arect(4);ymax=-arect(3);
cur_ax=gca(),
cur_ax.clip_state="off";
dy = ymax-ymin ;
yOffset = dy / 60 ;
drx=(xmax-xmin)/20 //length of the line
xOffset = drx/5 ;
bbx=[]
for k=1:nleg
r = stringbox( leg(k), 0, 0, 0, old_ax.font_style, font_size ) ;
bbx=[bbx;r(1,3) - r(1,1) , r(2,3) - r(2,1)]; //[width height]
end
height = sum(bbx(:,2))
width = max(bbx(:,1)) + drx * 1.6 ; // 1.6 * drx = 1.2 * drx + 2 * drx / 5 ;
//upper left coordinates
if size(opt,"*")>1 then
// fix for bug 1237 (Bruno 9 march 2005)
if old_ax.tight_limits == "on" then // data_bounds' corresponds to the old frec
r2 = old_ax.data_bounds'
else
r2 = [old_ax.x_ticks.locations(1),old_ax.y_ticks.locations(1),...
old_ax.x_ticks.locations($),old_ax.y_ticks.locations($)]
end
pos(1) = xmin + ((opt(1)-r2(1))/(r2(3)-r2(1)))*(1-arect(1)-arect(2))
pos(2) = ymin + ((opt(2)-r2(2))/(r2(4)-r2(2)))*(1-arect(3)-arect(4))
// end bugfix
opt=0 ;
elseif opt<1 | opt>6 then
error(msprintf(gettext("%s: Wrong value for input argument %s: Must be in the interval [%d, %d]."),"legends", "opt", 1, 6)); // if opt is entered by a string by the user it is in the range
end
select opt
case 1 then
pos=[xmax-width-xOffset,ymax-yOffset]
case 2 then
pos=[xmin+xOffset,ymax-yOffset]
case 3 then
pos=[xmin+xOffset,ymin+height+yOffset]
case 4 then
pos=[xmax-width-xOffset,ymin+height+yOffset]
case 5 then
rect=dragrect([xmax-width-xOffset,ymax-yOffset,width,height])
pos=rect(1:2)
case 6 then
// decrease the size of the graph to leave place for the legend
old_ax.margins=[xmin;arect(2);arect(4);arect(3)+height + 2 * yOffset ]
pos=[(xmin+xmax)/2-width/2, ymin + height - 2 * yOffset ]
end
x=pos(1)+xOffset
y=pos(2)
f.immediate_drawing = "off",
a=gca() ;
a.foreground=old_ax.foreground ;
a.background=old_ax.background ;
a.font_color=old_ax.font_color ;
a.font_size =old_ax.font_size ;
a.font_style=old_ax.font_style ;
R=[]
if with_box then
xpol = [pos(1), pos(1)+width, pos(1)+width, pos(1)];
ypol = [pos(2), pos(2), pos(2)-height, pos(2)-height];
xfpoly(xpol, ypol,1)
R = gce();
R.foreground=a.foreground;
R.background=a.background;
end
for k=1:nleg
if k<=size(style,2) then
if type(style)==9 then
h=style(k)
select h.type
case "Polyline"
if h.polyline_style==5 then //patch
xfpoly([x;x+drx;x+drx;x;x],[y-bbx(k,2);y-bbx(k,2);y;y;y-bbx(k,2)]);
r=gce();
r = unglue(r); // one xfpoly returns 2 polylines -> tmp bug to fix later F.Leray
r.foreground=h.foreground;
r.thickness=h.thickness;
r.polyline_style=h.polyline_style;
r.line_style=h.line_style;
else
if stripblanks(h.mark_mode)=="off"
xpoly([x;x+drx],[y;y]-bbx(k,2)/2,"lines");r=gce();
r.foreground=h.foreground;
r.thickness=h.thickness;
r.polyline_style=h.polyline_style;
r.line_style=h.line_style;
else
xpoly(x+drx/2,y-bbx(k,2)/2);r=gce();
r.foreground=h.foreground;
r.thickness=h.thickness;
r.mark_style=h.mark_style;
r.mark_size=h.mark_size;
end
end
else
error(msprintf(gettext("%s: Wrong type for input argument #%d: Polyline handles expected.\n"),"legends",2));
end
else
if style(1,k)<= 0 then
xpoly(x+drx/2,y-bbx(k,2)/2)
r=gce(),
r.mark_mode="on"
r.mark_style=-style(1,k)
if size(style,1)==2 then r.mark_foreground=style(2,k);end
else
xpoly([x;x+drx],[y;y]-bbx(k,2)/2,"lines")
r=gce(),
r.foreground=style(1,k)
if size(style,1)==2 then r.line_style=style(2,k);end
end
end
end
R=[R,r']
xstring(x + drx*1.2 + bbx(k,1)/2,y-bbx(k,2)/2,leg(k))
r=gce()
r.font_size = font_size ;
r.alignment = "center" ;
r.text_box_mode = "centered" ; // the string is centered on (x,y)
R=[R,r]
y=y-bbx(k,2) ;
end
glue(R)
a=gca();
a.data_bounds = [0,0;0.001,0.001];
set("current_axes",old_ax),
// if immediate_drawing was "on", then the figure will redraw itself.
f.immediate_drawing = vis;
endfunction
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