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% MetaUtil, an easier MetaPost life
% Copyright (C) 2005 Ovidiu Gheorghies
%
% This program is free software; you can redistribute it and/or
% modify it under the terms of the GNU General Public License
% as published by the Free Software Foundation; either version 2
% of the License, or (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not, write to the Free Software
% Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
if known _util_group_mp:
expandafter endinput
fi;
_util_group_mp:=1;
input util_object;
input util_commons;
input util_margins;
input util_log;
vardef GroupInfo@#(expr pleft, pright, ptop, pbottom)=
attributes(@#);
var(color) borderColor;
var(numeric) boxed;
@#boxed := 0;
@#borderColor := red;
Margins.@#(pleft, pright, ptop, pbottom);
enddef;
vardef GroupInfoCopy@#(text src)=
GroupInfo@#(src.left, src.right, src.top, src.bottom);
@#boxed := src.boxed;
@#borderColor := src.borderColor;
enddef;
GroupInfo.iGroup(2, 2, 2, 2);
GroupInfoCopy.iGroupBoxed(iGroup);
iGroupBoxed.boxed := 1;
vardef EGroup@#(text groupInfo)(text objects)=
ObjectEquations(@#);
@#className := "Group";
var(numeric) minx, maxx, miny, maxy;
var(numeric) nObjects;
var(string) objectsAsString;
GroupInfoCopy.@#info(groupInfo);
@#objectsAsString := enumToString(objects)("");
log @#objectsAsString;
@#nObjects := 0;
if @#objectsAsString <> "":
forsuffixes obj = scantokens @#objectsAsString:
@#nObjects := @#nObjects + 1;
endfor;
fi;
enddef;
vardef Group@#(text objects)=
EGroup@#(iGroup)(objects);
enddef;
vardef Group_layout@#=
if @#layedout = 0:
log "Needing layout for group " & (str @#);
@#layedout := 1;
if (@#objectsAsString = ""):
@#width = @#info.left + @#info.right;
@#height = @#info.top + @#info.bottom;
else:
log "Calling layout for objects group '" & (str @#) & "' ...";
log " object are: '" & @#objectsAsString & "'.";
layoutObjects(scantokens @#objectsAsString);
log "All objects in group '" & (str @#) & "' are now layed out.";
% As already tested, @#objectsAsString must be <> "".
% See page 53, User's manual for MetaPost
% "if some of the suffixes are empty, the loop gets
% executed, with the loop index parameter set to
% the empty suffix" (!)
log "Proceeding to finding min/max x/y of objects:";
log " " & @#objectsAsString;
__objectIndex := 0;
forsuffixes obj__ = scantokens @#objectsAsString:
if __objectIndex = 0:
log "First object " & str obj__;
@#minx := obj__.left;
log @#maxx;
log obj__.right;
@#maxx := obj__.right;
log @#maxx;
@#miny := obj__.bottom;
@#maxy := obj__.top;
__objectIndex := __objectIndex + 1;
else:
log "Current object " & str obj__;
log "comparing(min)";
log @#minx;
log @#obj__.left;
@#minx := min(@#minx)(obj__.left);
log "comparing(max)";
log @#maxx;
log @#obj__.right;
@#maxx := max(@#maxx)(obj__.right);
log "comparing(min)";
log @#miny;
log @#obj__.bottom;
@#miny := min(@#miny)(obj__.bottom);
log "comparing(max)";
log @#maxy;
log @#obj__.top;
@#maxy := max(@#maxy)(obj__.top);
__objectIndex := __objectIndex + 1;
fi;
endfor;
log "... done iterating";
log "maxx = ";
log @#maxx;
@#nw = (@#minx - @#info.left, @#maxy + @#info.top);
@#se = (@#maxx + @#info.right, @#miny - @#info.bottom);
log "Done performing actual layout for group " & str @#;
fi;
else:
log "NOT needing layout for group " & (str @#);
fi;
enddef;
vardef Group_draw@#=
log "Drawing group....";
Group_layout@#;
objectEnsurePositioning.@#;
if @#objectsAsString <> "":
drawObjects(scantokens @#objectsAsString);
fi;
if (@#info.boxed = 1):
draw objectBox(@#) withcolor @#info.borderColor;
fi;
enddef;
vardef Group_border@#=
objectBox(@#)
enddef;
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