Module: Draw

Included in:
Gviz
Defined in:
lib/gviz/draw.rb

Overview

Draw module includes a set of methods for specific shapes. Each methods defines with shape name and its positions.

Instance Method Summary collapse

Instance Method Details

#circle(id, x: 0, y: 0, r: 0.5, **attrs) ⇒ Object

Define a node with circle shape.



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# File 'lib/gviz/draw.rb', line 13

def circle(id, x:0, y:0, r:0.5, **attrs)
  attrs.update(width:r*2, height:r*2)
  ellipse(id, x:x, y:y, **attrs)
end

#ellipse(id, x: 0, y: 0, **attrs) ⇒ Object

Define a node with ellipse shape.



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# File 'lib/gviz/draw.rb', line 5

def ellipse(id, x:0, y:0, **attrs)
  draw_init
  attrs = {label:"", color:"black", fillcolor:"#FFFFFF00"}.merge(attrs)
  attrs.update(shape:"ellipse", pos:"#{x},#{y}!")
  node(id, attrs)
end

#line(id, from: [0,0], **attrs) ⇒ Object

Define a line with an edge and two point nodes.



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# File 'lib/gviz/draw.rb', line 34

def line(id, from:[0,0], **attrs)
  draw_init
  unless to = attrs.delete(:to)
    raise ArgumentError, "Argument 'to' is required"
  end
  n1_id, n2_id = [1, 2].map { |i| "#{id}#{i}".to_id }
  point(n1_id, x:from[0], y:from[1],
        color:"#FFFFFF00", fillcolor:"#FFFFFF00")
  point(n2_id, x:to[0], y:to[1],
        color:"#FFFFFF00", fillcolor:"#FFFFFF00")
  attrs.update(arrowhead:"none")
  edge(:"#{n1_id}_#{n2_id}", attrs)
end

#point(id, x: 0, y: 0, **attrs) ⇒ Object

Define a node with point shape.



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# File 'lib/gviz/draw.rb', line 27

def point(id, x:0, y:0, **attrs)
  draw_init
  attrs.update(shape:"point", pos:"#{x},#{y}!")
  node(id, attrs)
end

#square(id, x: 0, y: 0, **attrs) ⇒ Object

Define a node with square shape.



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# File 'lib/gviz/draw.rb', line 19

def square(id, x:0, y:0, **attrs)
  w, h = %i(width height).map { |at| attrs.delete at }
  size = w || h || 1
  attrs.update(width:size, height:size)
  rect(id, x:x, y:y, **attrs)
end