wolffd@0: function [x, y, h] = draw_graph(adj, labels, node_t, x, y)
wolffd@0: % DRAW_LAYOUT		Draws a layout for a graph 
wolffd@0: %
wolffd@0: %  [<X, Y>] = DRAW_LAYOUT(ADJ, <LABELS, ISBOX, X, Y>)
wolffd@0: %
wolffd@0: % Inputs :
wolffd@0: %	ADJ : Adjacency matrix (source, sink)
wolffd@0: %       LABELS : Cell array containing labels <Default : '1':'N'>
wolffd@0: %       ISBOX : 1 if node is a box, 0 if oval <Default : zeros>
wolffd@0: %       X, Y, : Coordinates of nodes on the unit square <Default : calls make_layout>
wolffd@0: %
wolffd@0: % Outputs :
wolffd@0: %	X, Y : Coordinates of nodes on the unit square
wolffd@0: %       H    : Object handles 
wolffd@0: %
wolffd@0: % Usage Example : [x, y] = draw_layout([0 1;0 0], {'Hidden','Visible'}, [1 0]');
wolffd@0: %
wolffd@0: % h(i,1) is the text handle - color
wolffd@0: % h(i,2) is the circle handle - facecolor
wolffd@0: %
wolffd@0: % Note	:
wolffd@0: % See also MAKE_LAYOUT
wolffd@0: 
wolffd@0: % Uses :
wolffd@0: 
wolffd@0: % Change History :
wolffd@0: % Date		Time		Prog	Note
wolffd@0: % 13-Apr-2000	 9:06 PM	ATC	Created under MATLAB 5.3.1.29215a (R11.1)
wolffd@0: 
wolffd@0: % ATC = Ali Taylan Cemgil,
wolffd@0: % SNN - University of Nijmegen, Department of Medical Physics and Biophysics
wolffd@0: % e-mail : cemgil@mbfys.kun.nl 
wolffd@0: adj = double(adj);
wolffd@0: N = size(adj,1);
wolffd@0: if nargin<2,
wolffd@0: %  labels = cellstr(char(zeros(N,1)+double('+')));
wolffd@0:   labels = cellstr(int2str((1:N)'));
wolffd@0: end;
wolffd@0: 
wolffd@0: if nargin<3,
wolffd@0:   node_t = zeros(N,1);
wolffd@0: %  node_t = rand(N,1) > 0.5;
wolffd@0: else
wolffd@0:   node_t = node_t(:);
wolffd@0: end;
wolffd@0:   
wolffd@0: axis([0 1 0 1]);
wolffd@0: set(gca,'XTick',[],'YTick',[],'box','on');
wolffd@0: % axis('square');
wolffd@0: %colormap(flipud(gray));
wolffd@0: 
wolffd@0: if nargin<4,
wolffd@0:   [x y] = make_layout(adj);
wolffd@0: end;
wolffd@0: 
wolffd@0: idx1 = find(node_t==0); wd1=[];
wolffd@0: if ~isempty(idx1),
wolffd@0: [h1 wd1] = textoval(x(idx1), y(idx1), labels(idx1));
wolffd@0: end;
wolffd@0: 
wolffd@0: idx2 = find(node_t~=0); wd2 = [];
wolffd@0: if ~isempty(idx2),
wolffd@0: [h2 wd2] = textbox(x(idx2), y(idx2), labels(idx2));
wolffd@0: end;
wolffd@0: 
wolffd@0: wd = zeros(size(wd1,1)+size(wd2,1),2);
wolffd@0: if ~isempty(idx1), wd(idx1, :) = wd1;  end;
wolffd@0: if ~isempty(idx2), wd(idx2, :) = wd2; end;
wolffd@0: 
wolffd@0: for i=1:N,
wolffd@0:   j = find(adj(i,:)==1);
wolffd@0:   for k=j,
wolffd@0:     if x(k)-x(i)==0,
wolffd@0: 	sign = 1;
wolffd@0: 	if y(i)>y(k), alpha = -pi/2; else alpha = pi/2; end;
wolffd@0:     else
wolffd@0: 	alpha = atan((y(k)-y(i))/(x(k)-x(i)));
wolffd@0: 	if x(i)<x(k), sign = 1; else sign = -1; end;
wolffd@0:     end;
wolffd@0:     dy1 = sign.*wd(i,2).*sin(alpha);   dx1 = sign.*wd(i,1).*cos(alpha);
wolffd@0:     dy2 = sign.*wd(k,2).*sin(alpha);   dx2 = sign.*wd(k,1).*cos(alpha);    
wolffd@0:     if adj(k,i)==0, % if directed edge
wolffd@0:       arrow([x(i)+dx1 y(i)+dy1],[x(k)-dx2 y(k)-dy2]);
wolffd@0:     else	   
wolffd@0:       line([x(i)+dx1 x(k)-dx2],[y(i)+dy1 y(k)-dy2],'color','k');
wolffd@0:       adj(k,i)=-1; % Prevent drawing lines twice
wolffd@0:     end;
wolffd@0:   end;
wolffd@0: end;
wolffd@0: 
wolffd@0: if nargout>2,
wolffd@0:   h = zeros(length(wd),2);
wolffd@0:   if ~isempty(idx1),
wolffd@0:     h(idx1,:) = h1;
wolffd@0:   end;
wolffd@0:   if ~isempty(idx2),
wolffd@0:     h(idx2,:) = h2;
wolffd@0:   end;
wolffd@0: end;
wolffd@0: 
wolffd@0: %%%%%
wolffd@0: 
wolffd@0: function [t, wd] = textoval(x, y, str)
wolffd@0: % TEXTOVAL		Draws an oval around text objects
wolffd@0: % 
wolffd@0: %  [T, WIDTH] = TEXTOVAL(X, Y, STR)
wolffd@0: %  [..] = TEXTOVAL(STR)  % Interactive
wolffd@0: % 
wolffd@0: % Inputs :
wolffd@0: %    X, Y : Coordinates
wolffd@0: %    TXT  : Strings
wolffd@0: % 
wolffd@0: % Outputs :
wolffd@0: %    T : Object Handles
wolffd@0: %    WIDTH : x and y Width of ovals 
wolffd@0: %
wolffd@0: % Usage Example : [t] = textoval('Visit to Asia?');
wolffd@0: % 
wolffd@0: % 
wolffd@0: % Note     :
wolffd@0: % See also TEXTBOX
wolffd@0: 
wolffd@0: % Uses :
wolffd@0: 
wolffd@0: % Change History :
wolffd@0: % Date		Time		Prog	Note
wolffd@0: % 15-Jun-1998	10:36 AM	ATC	Created under MATLAB 5.1.0.421
wolffd@0: 
wolffd@0: % ATC = Ali Taylan Cemgil,
wolffd@0: % SNN - University of Nijmegen, Department of Medical Physics and Biophysics
wolffd@0: % e-mail : cemgil@mbfys.kun.nl 
wolffd@0: 
wolffd@0: temp = [];
wolffd@0: 
wolffd@0: switch nargin,
wolffd@0:   case 1,
wolffd@0:     str = x;
wolffd@0:     if ~isa(str,'cell') str=cellstr(str); end;
wolffd@0:     N = length(str);
wolffd@0:     wd = zeros(N,2);
wolffd@0:     for i=1:N,
wolffd@0:       [x, y] = ginput(1);
wolffd@0:       tx = text(x,y,str{i},'HorizontalAlignment','center','VerticalAlign','middle');
wolffd@0:       [ptc wx wy] = draw_oval(tx, x, y);
wolffd@0:       wd(i,:) = [wx wy];
wolffd@0:       delete(tx);      
wolffd@0:       tx = text(x,y,str{i},'HorizontalAlignment','center','VerticalAlign','middle');
wolffd@0:       temp = [temp ; tx ptc];
wolffd@0:     end;
wolffd@0:   case 3,
wolffd@0:     if ~isa(str,'cell') str=cellstr(str); end;
wolffd@0:     N = length(str);    
wolffd@0:     wd = zeros(N,2);
wolffd@0:     for i=1:N,
wolffd@0:       tx = text(x(i),y(i),str{i},'HorizontalAlignment','center','VerticalAlign','middle');
wolffd@0:      [ptc wx wy] = draw_oval(tx, x(i), y(i));
wolffd@0:       wd(i,:) = [wx wy];
wolffd@0:       delete(tx);
wolffd@0:       tx = text(x(i),y(i),str{i},'HorizontalAlignment','center','VerticalAlign','middle');      
wolffd@0:       temp = [temp;  tx ptc];
wolffd@0:     end;
wolffd@0:   otherwise,
wolffd@0: end;  
wolffd@0: 
wolffd@0: if nargout>0, t = temp; end;
wolffd@0: 
wolffd@0: %%%%%%%%%
wolffd@0: 
wolffd@0: 
wolffd@0: function [ptc, wx, wy] = draw_oval(tx, x, y)
wolffd@0: % Draws an oval box around a tex object
wolffd@0: sz = get(tx,'Extent');
wolffd@0: wy = sz(4);
wolffd@0: wx = max(2/3*sz(3), wy); 
wolffd@0: wx = 0.5*wx; % KPM
wolffd@0: wy = 0.5*wy;
wolffd@0: ptc = ellipse(x, y, wx, wy);
wolffd@0: set(ptc, 'FaceColor','w');
wolffd@0: 
wolffd@0: 
wolffd@0: %%%%%%%%%%%%%
wolffd@0: 
wolffd@0: function [p] = ellipse(x, y, rx, ry, c)
wolffd@0: % ELLIPSE		Draws Ellipse shaped patch objects
wolffd@0: % 
wolffd@0: %  [<P>] = ELLIPSE(X, Y, Rx, Ry, C)
wolffd@0: % 
wolffd@0: % Inputs :
wolffd@0: %    X : N x 1 vector of x coordinates
wolffd@0: %    Y : N x 1 vector of y coordinates
wolffd@0: %    Rx, Ry : Radii
wolffd@0: %    C : Color index
wolffd@0: %
wolffd@0: % 
wolffd@0: % Outputs :
wolffd@0: %    P = Handles of Ellipse shaped path objects
wolffd@0: % 
wolffd@0: % Usage Example : [] = ellipse();
wolffd@0: % 
wolffd@0: % 
wolffd@0: % Note     :
wolffd@0: % See also 
wolffd@0: 
wolffd@0: % Uses :
wolffd@0: 
wolffd@0: % Change History :
wolffd@0: % Date		Time		Prog	Note
wolffd@0: % 27-May-1998	 9:55 AM	ATC	Created under MATLAB 5.1.0.421
wolffd@0: 
wolffd@0: % ATC = Ali Taylan Cemgil,
wolffd@0: % SNN - University of Nijmegen, Department of Medical Physics and Biophysics
wolffd@0: % e-mail : cemgil@mbfys.kun.nl 
wolffd@0: 
wolffd@0: if (nargin < 2) error('Usage Example : e = ellipse([0 1],[0 -1],[1 0.5],[2 0.5]); '); end;
wolffd@0: if (nargin < 3) rx = 0.1; end;
wolffd@0: if (nargin < 4) ry = rx; end;
wolffd@0: if (nargin < 5) c = 1; end;
wolffd@0: 
wolffd@0: if length(c)==1, c = ones(size(x)).*c; end;
wolffd@0: if length(rx)==1, rx = ones(size(x)).*rx; end;
wolffd@0: if length(ry)==1, ry = ones(size(x)).*ry; end;
wolffd@0:   
wolffd@0: n = length(x);
wolffd@0: p = zeros(size(x));
wolffd@0: t = 0:pi/30:2*pi;
wolffd@0: for i=1:n,
wolffd@0: 	px = rx(i)*cos(t)+x(i);
wolffd@0: 	py = ry(i)*sin(t)+y(i);
wolffd@0: 	p(i) = patch(px,py,c(i));
wolffd@0: end;
wolffd@0: 
wolffd@0: if nargout>0, pp = p; end;
wolffd@0: 
wolffd@0: %%%%%
wolffd@0: 
wolffd@0: function [t, wd] = textbox(x,y,str)
wolffd@0: % TEXTBOX	Draws A Box around the text 
wolffd@0: % 
wolffd@0: %  [T, WIDTH] = TEXTBOX(X, Y, STR)
wolffd@0: %  [..] = TEXTBOX(STR)
wolffd@0: % 
wolffd@0: % Inputs :
wolffd@0: %    X, Y : Coordinates
wolffd@0: %    TXT  : Strings
wolffd@0: % 
wolffd@0: % Outputs :
wolffd@0: %    T : Object Handles
wolffd@0: %    WIDTH : x and y Width of boxes 
wolffd@0: %% 
wolffd@0: % Usage Example : t = textbox({'Ali','Veli','49','50'});
wolffd@0: % 
wolffd@0: % 
wolffd@0: % Note     :
wolffd@0: % See also TEXTOVAL
wolffd@0: 
wolffd@0: % Uses :
wolffd@0: 
wolffd@0: % Change History :
wolffd@0: % Date		Time		Prog	Note
wolffd@0: % 09-Jun-1998	11:43 AM	ATC	Created under MATLAB 5.1.0.421
wolffd@0: 
wolffd@0: % ATC = Ali Taylan Cemgil,
wolffd@0: % SNN - University of Nijmegen, Department of Medical Physics and Biophysics
wolffd@0: % e-mail : cemgil@mbfys.kun.nl 
wolffd@0: 
wolffd@0: % See
wolffd@0: temp = [];
wolffd@0: 
wolffd@0: switch nargin,
wolffd@0:   case 1,
wolffd@0:     str = x;
wolffd@0:     if ~isa(str,'cell') str=cellstr(str); end;
wolffd@0:     N = length(str);  
wolffd@0:     wd = zeros(N,2);
wolffd@0:     for i=1:N,
wolffd@0:       [x, y] = ginput(1);
wolffd@0:       tx = text(x,y,str{i},'HorizontalAlignment','center','VerticalAlign','middle');
wolffd@0:       [ptc wx wy] = draw_box(tx, x, y); 
wolffd@0:       wd(i,:) = [wx wy];
wolffd@0:       delete(tx);
wolffd@0:       tx = text(x,y,str{i},'HorizontalAlignment','center','VerticalAlign','middle');      
wolffd@0:       temp = [temp; tx ptc];
wolffd@0:     end;
wolffd@0:   case 3,
wolffd@0:     if ~isa(str,'cell') str=cellstr(str); end;    
wolffd@0:     N = length(str);
wolffd@0:     for i=1:N,
wolffd@0:       tx = text(x(i),y(i),str{i},'HorizontalAlignment','center','VerticalAlign','middle');
wolffd@0:       [ptc wx wy] = draw_box(tx, x(i), y(i));
wolffd@0:       wd(i,:) = [wx wy];
wolffd@0:       delete(tx);
wolffd@0:       tx = text(x(i),y(i),str{i},'HorizontalAlignment','center','VerticalAlign','middle');      
wolffd@0:       temp = [temp; tx ptc];
wolffd@0:     end;
wolffd@0:      
wolffd@0:   otherwise,
wolffd@0: 
wolffd@0: end;  
wolffd@0: 
wolffd@0: if nargout>0, t = temp; end;
wolffd@0: 
wolffd@0: 
wolffd@0: function [ptc, wx, wy] = draw_box(tx, x, y)
wolffd@0: % Draws a box around a tex object
wolffd@0:       sz = get(tx,'Extent');
wolffd@0:       wy = 2/3*sz(4);
wolffd@0:       wx = max(2/3*sz(3), wy);
wolffd@0:       ptc = patch([x-wx x+wx x+wx x-wx], [y+wy y+wy y-wy y-wy],'w');
wolffd@0:       set(ptc, 'FaceColor','w');
wolffd@0: