Module: MetaPost::Stacks

Includes:
Standard
Defined in:
lib/metapost-erb.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Standard

#draw_labels, #draw_on_layer, #labels, #layers, #v, #write!, #x, #y

Instance Attribute Details

#default_stack_colours ⇒ Object

Returns the value of attribute default_stack_colours.


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# File 'lib/metapost-erb.rb', line 94

def default_stack_colours
  @default_stack_colours
end

#stack_sw_x ⇒ Object

Returns the value of attribute stack_sw_x.


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# File 'lib/metapost-erb.rb', line 96

def stack_sw_x
  @stack_sw_x
end

#stacks ⇒ Object

Returns the value of attribute stacks.


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# File 'lib/metapost-erb.rb', line 95

def stacks
  @stacks
end

Instance Method Details

#box_definition(string) ⇒ Object 


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# File 'lib/metapost-erb.rb', line 139

def box_definition(string)
  draw_on_layer 0, string
end

#box_draw(string) ⇒ Object 


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# File 'lib/metapost-erb.rb', line 147

def box_draw(string)
  draw_on_layer 2, string
end

#box_label(string) ⇒ Object 


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# File 'lib/metapost-erb.rb', line 151

def box_label(string)
  draw_on_layer 3, string
end

#box_position(string) ⇒ Object 


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# File 'lib/metapost-erb.rb', line 143

def box_position(string)
  draw_on_layer 1, string
end

#chart(default_stack_colours, &block) ⇒ Object 


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# File 'lib/metapost-erb.rb', line 120

def chart(default_stack_colours, &block)
  self.stacks = nil
  self.stack_sw_x = nil
  self.default_stack_colours = default_stack_colours
  block.call
  write!
end

#label_box(box_name, text, corner = :n, colour = "black", rotation = nil, offset = nil, label_position = nil) ⇒ Object 


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# File 'lib/metapost-erb.rb', line 128

def label_box(box_name,text,corner = :n, colour = "black", rotation = nil, offset = nil, label_position = nil)
  rotation ||= {'ne' => '45', 'n' => '45'}[corner.to_s]
  offset ||= {'ne' => "(0.5 cm, 0.5 cm)", 'n' => "(0.5 cm,0.5 cm)", 'e' => "(0.5 cm, 0 cm)"}[corner.to_s]
  label_position ||= {'ne' => 'urt', 'e' => 'rt', 'n' => 'urt' }[corner.to_s]

  anchor = "#{box_name}.#{corner}"
  box_label arrow = "draw (#{anchor} shifted #{offset})..(#{anchor} shifted (#{offset}/10)) withcolor #{colour}"
  box_label text = "label.#{label_position}( btex #{text} etex #{rotation && "rotated #{rotation}"}, (#{anchor} shifted #{offset}) ) withcolor #{colour}"
  arrow + ";\n" + text + ";\n"
end

#stack(stack_name, width, heights, pen_color = self.default_stack_colours, fill_color = nil) ⇒ Object 


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# File 'lib/metapost-erb.rb', line 98

def stack(stack_name, width, heights, pen_color = self.default_stack_colours, fill_color = nil)
  self.stacks ||= {}
  self.stacks[stack_name] = []
  self.stack_sw_x ||= 0
  heights = [heights] unless heights.is_a?(Array)
  pen_color = Array.new(heights.size,pen_color) unless pen_color.is_a?(Array)
  fill_color = pen_color.map { |pen| "0.75*white+0.25*(#{pen})" } unless fill_color
  fill_color = Array.new(heights.size,fill_color) unless fill_color.is_a?(Array)
  result = []
  height = 0
  heights.each.with_index do |box_height,i|
    self.stacks[stack_name] << box_name = "#{v(stack_name)}[#{i}]"
    box_definition "boxit.#{box_name}()"
    box_position   "#{box_name}.sw = (#{x @stack_sw_x}, #{y height})"
    box_position   "#{box_name}.ne = (#{x(@stack_sw_x + width)}, #{y height + box_height})"
    height = height + box_height
    box_draw       "fill bpath(#{box_name}) withcolor #{fill_color[i]}"
    box_draw       "draw bpath(#{box_name}) withcolor #{pen_color[i]}"
  end    
  self.stack_sw_x = self.stack_sw_x + width
end