Class: Rubyvis::Wedge

Inherits:
Mark show all
Defined in:
lib/rubyvis/mark/wedge.rb

Instance Attribute Summary

Attributes inherited from Mark

#_properties, #binds, #child_index, #parent, #proto, #root, #scale, #scene, #target

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Mark

#add, attr_accessor_dsl, #bind, #build, #build_instance, #build_properties, #context, #context_apply, #context_clear, #cousin, #delete_index, #event, #extend, index, #index, index=, #index=, #index_defined?, #initialize, #instance, #instances, #margin, #mark_anchor, #mark_bind, #mark_build_implied, #mark_build_instance, #properties, properties, property_method, #property_value, #render, scene, scene=, #sibling, stack, stack=

Constructor Details

This class inherits a constructor from Rubyvis::Mark

Class Method Details

.defaults ⇒ Object 



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# File 'lib/rubyvis/mark/wedge.rb', line 12

def self.defaults
  a=Rubyvis.Colors.category20()
  Wedge.new.extend(Mark.defaults).start_angle(lambda  {s=self.sibling; s ? s.end_angle: -Math::PI.quo(2) } ).inner_radius( 0 ).line_width( 1.5 ).stroke_style( nil ).fill_style( lambda {a.scale(self.index)})
end

.upright(angle) ⇒ Object 



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# File 'lib/rubyvis/mark/wedge.rb', line 111

def self.upright(angle)
  angle=angle % (2*Math::PI)
  angle=(angle<0) ? (2*Math::PI+angle) : angle
  (angle < Math::PI/2.0) or (angle>=3*Math::PI / 2.0)
  
end

Instance Method Details

#anchor(name) ⇒ Object 



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# File 'lib/rubyvis/mark/wedge.rb', line 23

def anchor(name)
  partial=lambda {|s| s.inner_radius!=0 ? true : s.angle<2*Math.PI}
  mid_radius=lambda {|s| (s.inner_radius+s.outer_radius) / 2.0}
  mid_angle=lambda {|s| (s.start_angle+s.end_angle) / 2.0 }
  
  mark_anchor(name).left(lambda {
    s = self.scene.target[self.index];
    if (partial.call(s))
      
      case (self.name()) 
      when "outer"
        return s.left + s.outer_radius * Math.cos(mid_angle.call(s))
      when "inner"
        return s.left + s.inner_radius * Math.cos(mid_angle.call(s))
      when "start"
        return s.left + mid_radius.call(s) * Math.cos(s.start_angle)
      when "center"
        return s.left + mid_radius.call(s) * Math.cos(mid_angle.call(s))
      when "end"
        return s.left + mid_radius.call(s) * Math.cos(s.end_angle)
      end
    end
    return s.left;
  }).top(lambda {
    s = self.scene.target[self.index];
    if (partial.call(s))
      case (self.name()) 
      when "outer"
        return s.top + s.outer_radius * Math.sin(mid_angle.call(s))
      when "inner"
        return s.top + s.inner_radius * Math.sin(mid_angle.call(s))
      when "start"
        return s.top + mid_radius.call(s) * Math.sin(s.start_angle)
      when "center"
        return s.top + mid_radius.call(s) * Math.sin(mid_angle.call(s))
      when "end"
        return s.top + mid_radius.call(s) * Math.sin(s.end_angle)
      end
    end
    return s.top;
      
  }).text_align(lambda {
  s = self.scene.target[self.index];
    if (partial.call(s))
      case (self.name()) 
      when 'outer'
        return self.upright(mid_angle.call(s)) ? 'right':'left'
      when 'inner'
        return self.upright(mid_angle.call(s)) ? 'left':'right'
        
      end
    end
    return 'center'
  }).text_baseline(lambda {
  s = self.scene.target[self.index];
    if (partial.call(s))
      case (self.name()) 
      when 'start'
        return self.upright(s.start_angle) ? 'top':'bottom'
      when 'end'
        return self.upright(s.end_angle) ? 'bottom':'top'
        
      end
    end
    return 'middle'
  }).text_angle(lambda {
    s = self.scene.target[self.index];
    a=0
    if (partial.call(s))
      case (self.name()) 
      when 'center'
        a=mid_angle.call(s)
      when 'inner'
        a=mid_angle.call(s)
      when 'outer'
        a=mid_angle.call(s)
      when 'start'
        a=s.start_angle
      when 'end'
        a=s.end_angle
      end
    end
    self.upright(a) ? a: (a+Math::PI) 
  })
  
end

#build_implied(s) ⇒ Object 



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# File 'lib/rubyvis/mark/wedge.rb', line 117

def build_implied(s)
  if (s.angle.nil?)
    s.angle= s.end_angle-s.start_angle 
  elsif s.end_angle.nil?
    s.end_angle=s.start_angle+s.angle
  end
  mark_build_implied(s)
end

#mid_angle ⇒ Object 



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# File 'lib/rubyvis/mark/wedge.rb', line 19

def mid_angle
  (start_angle+end_angle) / 2.0
end

#mid_radius ⇒ Object 



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# File 'lib/rubyvis/mark/wedge.rb', line 16

def mid_radius
  (inner_radius+outer_radius) / 2.0
end

#type ⇒ Object 



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# File 'lib/rubyvis/mark/wedge.rb', line 7

def type
  "wedge"
end