Class: CTioga2::Graphics::Styles::TextLabel

Inherits:
FullTextStyle show all
Defined in:
lib/ctioga2/graphics/styles/texts.rb

Overview

A label.

Constant Summary

Constants inherited from BasicStyle

BasicStyle::OldAttrAccessor

Instance Method Summary collapse

Methods inherited from BaseTextStyle

#draw_text

Methods inherited from BasicStyle

attr_accessor, attributes, from_hash, #instance_variable_defined?, options_hash, #set_from_hash, sub_style, sub_styles, #to_hash, typed_attribute, #update_from_other

Constructor Details

#initialize(text = nil, loc = nil) ⇒ TextLabel

Returns a new instance of TextLabel.



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# File 'lib/ctioga2/graphics/styles/texts.rb', line 116

def initialize(text = nil, loc = nil)
  super()
  @text = text
  @loc = loc
end

Instance Method Details

#draw(t, default = nil, measure = nil) ⇒ Object

Draw the label, if #text is not nil or false. Attributes such as scale, shift and angle are taken from the corresponding default if default isn’t nil.



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# File 'lib/ctioga2/graphics/styles/texts.rb', line 125

def draw(t, default = nil, measure = nil)
  if @text
    dict = prepare_label_dict(t, default, measure) 
    t.show_text(dict)
  end
end

#label_extension(t, default = nil, location = nil) ⇒ Object

Gets the extension of the label, in units of text height. Default values for the various parameters are taken from the default parameter if they are not specified.



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# File 'lib/ctioga2/graphics/styles/texts.rb', line 135

def label_extension(t, default = nil, location = nil)
  if @text
    dict = prepare_label_dict(t, default, nil)
    extra = 0
    if location
      extra = location.label_extra_space(t)
    end
    return (dict['shift'] + extra) * dict['scale']
  else
    return 0
  end
end