Class: CTioga2::Graphics::Styles::OrientedLineStyle

Inherits:
ArrowStyle show all
Defined in:
lib/ctioga2/graphics/styles/arrows.rb

Overview

This class represents all the stylistic information necessary to draw a line parallel to a certain direction, indicated by an angle (default to horizontal)

Constant Summary

Constants inherited from ArrowStyle

ArrowStyle::TiogaDefaults

Constants inherited from BasicStyle

BasicStyle::AllStyles, BasicStyle::OldAttrAccessor

Instance Method Summary collapse

Methods inherited from ArrowStyle

#draw_arrow, #old_draw_arrow

Methods inherited from StrokeStyle

#set_stroke_style

Methods inherited from LineStyle

#draw_line, #set_stroke_style

Methods inherited from BasicStyle

alias_for, aliases, attr_accessor, attribute_type, attribute_types, attributes, convert_string_hash, defined_aliases, deprecated_attribute, from_hash, inherited, #instance_variable_defined?, normalize_hash, normalize_in, normalize_out, options_hash, #set_from_hash, sub_style, sub_styles, #to_hash, typed_attribute, #update_from_other, #use_defaults_from

Instance Method Details

#draw_oriented_arrow(t, xo, yo, len) ⇒ Object

len is a dimension



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# File 'lib/ctioga2/graphics/styles/arrows.rb', line 170

def draw_oriented_arrow(t, xo, yo, len)

  angle = @angle || 0.0

  dx,dy = *len.to_figure(t, angle)

  case @origin || Tioga::FigureConstants::LEFT_JUSTIFIED
  when Tioga::FigureConstants::LEFT_JUSTIFIED
    x1, y1 = xo, yo
    x2, y2 = xo + dx, yo + dy
  when Tioga::FigureConstants::CENTERED
    x1, y1 = xo - 0.5 * dx, yo - 0.5 * dy
    x2, y2 = xo + 0.5 * dx, yo + 0.5 * dy
  when Tioga::FigureConstants::RIGHT_JUSTIFIED
    x1, y1 = xo - dx, yo - dy
    x2, y2 = xo, yo
  end
  
  draw_arrow(t, x1, y1, x2, y2)
end