Daniel@0: classdef Springlayout < Gvizlayout
Daniel@0: % A layout that also uses graphviz but calls twopi instead of neato to 
Daniel@0: % to display the graph like a tree. 
Daniel@0: %
Daniel@0: % Matthew Dunham
Daniel@0: % University of British Columbia 
Daniel@0: % http://www.cs.ubc.ca/~mdunham/  
Daniel@0:     methods
Daniel@0:        function obj = Springlayout(name)
Daniel@0:             if(nargin < 1)
Daniel@0:                 obj.name = 'springlayout';
Daniel@0:             else
Daniel@0:                 obj.name = name;
Daniel@0:             end
Daniel@0:             load glicons;
Daniel@0:             obj.image = icons.spring;
Daniel@0:             obj.shortDescription = 'Spring Layout (GraphViz)'; 
Daniel@0:        end
Daniel@0:        
Daniel@0:        function available = isavailable(obj)
Daniel@0:         % Make sure graphViz is available. 
Daniel@0:             available = Gvizlayout.queryGviz('fdp');
Daniel@0:             if(not(available))
Daniel@0:                  fprintf('Please install or upgrade graphViz\n');
Daniel@0:             end
Daniel@0:         end
Daniel@0:        
Daniel@0:     end
Daniel@0:     
Daniel@0:     methods(Access = 'protected')
Daniel@0:       
Daniel@0:        function callGraphViz(obj)
Daniel@0:        % Call GraphViz to determine an optimal layout. Write this layout in
Daniel@0:        % layout.dot for later parsing. 
Daniel@0:            err = system(['fdp -Tdot -Gmaxiter=5000 -Gstart=7 -o ',obj.layoutFile,' ',obj.adjFile]);
Daniel@0:            if(err),error('Sorry, unknown GraphViz failure, try another layout'); end
Daniel@0:        end
Daniel@0:        
Daniel@0:        
Daniel@0:       
Daniel@0:     end
Daniel@0:    
Daniel@0: end