Class: Mappum::MapServer::Graph

Inherits:
Object
  • Object
show all
Defined in:
lib/mappum/mapserver/mapgraph.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(map) ⇒ Graph

Returns a new instance of Graph.



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# File 'lib/mappum/mapserver/mapgraph.rb', line 5

def initialize(map)
    @map = map
    @root = []
    @struct_from = StrTree.new(nil,0,@root)
    @struct_from.name = "struct1"
    @struct_to = StrTree.new(nil,0,@root)
    @struct_to.name = "struct2"
    @edges = []
    @edge_maps = {}
    init(@map,@struct_from, @struct_to)
end

Instance Attribute Details

#edge_maps ⇒ Object (readonly)

Returns the value of attribute edge_maps.



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# File 'lib/mappum/mapserver/mapgraph.rb', line 4

def edge_maps
  @edge_maps
end

Instance Method Details

#getDot ⇒ Object 



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# File 'lib/mappum/mapserver/mapgraph.rb', line 36

def getDot
    str1 = makeStruct(@struct_from)
    str2 = makeStruct(@struct_to)
    edge = @edges.join
    return <<DOT
digraph structs { node [shape=plaintext]; rankdir=LR;  nodesep=0.1;    
 struct1 [
     label=<
      #{str1}
    >
    ]; 
 struct2 [
     label=<
      #{str2}
     >
    ];
    #{@root.collect { |struct| struct.line}}
    #{edge}
    
    }              
DOT
end

#getPng ⇒ Object 



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# File 'lib/mappum/mapserver/mapgraph.rb', line 26

def getPng
    cmd = "dot"
    format = "png"
    xCmd = "#{cmd} -T#{format}"
    dot = getDot
    f = IO.popen( xCmd ,"r+")
    f.print(dot)
    f.close_write
    return f
end

#getSvg ⇒ Object 



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# File 'lib/mappum/mapserver/mapgraph.rb', line 16

def getSvg
    cmd = "dot"
    format = "svg"
    xCmd = "#{cmd} -T#{format}"
    dot = getDot
    f = IO.popen( xCmd ,"r+")
    f.print(dot)
    f.close_write
    return f
end