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% Copyright 2005 2015 Ovidiu Gheorghies
% Licensed under the Apache License, Version 2.0.
if known _util_picture_stack_mp:
expandafter endinput
fi;
_util_picture_stack_mp:=1;
% Sadly, this copy of the macro is needed to prevent multiple file loads being shown by MetaPost.
% The guard values (such as _metauml_mp) do ensure that the file isn't loaded multiple times,
% but this macro makes sure that MetaPost won't try to load the file and display a message for that.
def inputonce text libraryFile=
if not known scantokens ("_" & str libraryFile & "_mp"):
%includeonce% show "Loading " & str libraryFile;
scantokens ("input " & str libraryFile);
else:
%includeonce% show str libraryFile & " already loaded.";
fi;
enddef;
inputonce util_picture;
inputonce util_commons;
inputonce util_group;
inputonce util_log;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% PICTURE STACK %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Style for a stack of child pictures with the given margins, spacing between children, and a common child style.
%% If child style supplier @#childStyleSupplier is set, it takes precedence over the common child style.
%% The child style supplier must be the name of a macro taking a child index as an argument and returning a child style.
vardef PictureStackInfo@#(expr marginLeft, marginRight, marginTop, marginBottom)(text _spacing)(text _childStyle)=
attributes(@#);
var(numeric) boxed;
var(color) borderColor;
var(numeric) spacing;
var(string) childStyleSupplier;
Margins@#(marginLeft, marginRight, marginTop, marginBottom);
@#spacing := _spacing;
@#boxed := 0;
@#borderColor := green;
@#childStyleSupplier := "";
PictureInfoCopy.@#iPict(_childStyle);
enddef;
vardef PictureStackInfoCopy@#(text src)=
PictureStackInfo@#(src.left, src.right, src.top, src.bottom)(src.spacing)(src.iPict);
@#childStyleSupplier := src.childStyleSupplier;
@#boxed := src.boxed;
@#borderColor := src.borderColor;
enddef;
PictureStackInfo.iStack(2, 2, 2, 2)(2)(iPict);
vardef EPictureStack@#(text pictStackInfo)(text thePictures)(text how)=
ObjectEquations(@#);
@#className := "PictureStack";
PictureStackInfoCopy.@#info(pictStackInfo);
attributes(@#);
var(numeric) nItems;
var(numeric) minx, miny, maxx, maxy;
var(string) picturesAsString;
%var(text) joinMethod;
string @#joinMethod;
%@#joinMethod := str how;
for l=how:
@#joinMethod := l;
endfor;
@#nItems := 0;
for p=thePictures:
if (@#info.childStyleSupplier <> ""):
EPicture.@#pict[@#nItems](scantokens (@#info.childStyleSupplier)(@#nItems))(p);
else:
EPicture.@#pict[@#nItems](@#info.iPict)(p);
fi;
@#nItems := @#nItems + 1;
endfor;
@#picturesAsString := listArray(@#pict)(@#nItems);
EGroup.@#group(@#info)(scantokens @#picturesAsString);
@#nw = @#group.nw;
@#se = @#group.se;
enddef;
vardef PictureStack@#(text thePictures)(text how)=
EPictureStack@#(iStack)(thePictures)(how);
enddef;
vardef PictureStack_layout@#=
if @#laidout = 1:
log "PictureStack " & (str @#) & " has already been layed out";
else:
@#laidout := 1;
layoutObjects(scantokens @#picturesAsString);
if @#joinMethod = "vleft":
setObjectJoin(pa.left=pb.left; pa.bottom = pb.top + @#info.spacing);
elseif @#joinMethod = "vcenter":
setObjectJoin(pa.midx=pb.midx; pa.bottom = pb.top + @#info.spacing);
elseif @#joinMethod = "vright":
setObjectJoin(pa.right=pb.right; pa.bottom = pb.top + @#info.spacing);
elseif @#joinMethod = "vleftbase":
setObjectJoin(pa.left=pb.left; pa.bottom = pb.bottom + @#info.spacing);
elseif @#joinMethod = "vcenterbase":
setObjectJoin(pa.midx=pb.midx; pa.bottom = pb.bottom + @#info.spacing);
elseif @#joinMethod = "vrightbase":
setObjectJoin(pa.right=pb.right; pa.bottom = pb.bottom + @#info.spacing);
else:
setObjectJoin(pa.c = pb.c); % By default, stack objects on top of each other.
scantokens @#joinMethod;
fi;
joinObjects(scantokens @#picturesAsString);
Group_layout.@#group;
fi;
enddef;
vardef PictureStack_draw@#=
PictureStack_layout.@#;
objectEnsurePositioning.@#;
for i=0 upto @#nItems-1:
Picture_draw.@#pict[i];
endfor;
if (@#info.boxed = 1):
draw objectBox(@#) withcolor @#info.borderColor;
fi;
enddef;
vardef PictureStack_border@#=
objectBox(@#)
enddef;
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