Class: CTioga2::Graphics::Types::MarginsBox

Inherits:
Box
  • Object
show all
Defined in:
lib/ctioga2/graphics/types/boxes.rb

Overview

A box defined by its margins

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Box

#classes, #to_frame_margins, #within_frames

Constructor Details

#initialize(left, right, top, bottom) ⇒ MarginsBox

Creates a new MarginsBox object with the specified margins, as String (passed on to Dimension::to_text), float (defaults to frame coordinates) or directly as Dimension objects.

The Dimension’s orientation is automatically tweaked.



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# File 'lib/ctioga2/graphics/types/boxes.rb', line 79

def initialize(left, right, top, bottom)
  # First, convert any float into Dimension:
  a = [left, right, top, bottom]
  a.each_index do |i|
    if ! a[i].is_a? Dimension
      a[i] = Dimension::from_text(a[i].to_s, :x, :frame)
    end
  end
  left, right, top, bottom = a

  # Then assign to the appropriate stuff:
  @left = left
  @left.orientation = :x
  @right = right
  @right.orientation = :x
  @top = top
  @top.orientation = :y
  @bottom = bottom
  @bottom.orientation = :y
end

Instance Attribute Details

#bottom ⇒ Object

Margin specifications. These are Dimension objects.



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# File 'lib/ctioga2/graphics/types/boxes.rb', line 72

def bottom
  @bottom
end

#left ⇒ Object

Margin specifications. These are Dimension objects.



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# File 'lib/ctioga2/graphics/types/boxes.rb', line 72

def left
  @left
end

#right ⇒ Object

Margin specifications. These are Dimension objects.



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# File 'lib/ctioga2/graphics/types/boxes.rb', line 72

def right
  @right
end

#top ⇒ Object

Margin specifications. These are Dimension objects.



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# File 'lib/ctioga2/graphics/types/boxes.rb', line 72

def top
  @top
end

Instance Method Details

#expand_to!(t, other) ⇒ Object

Augments the margins so that they also encompass those given in other. Based on the current interpretation of the measures as bp.



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# File 'lib/ctioga2/graphics/types/boxes.rb', line 128

def expand_to!(t, other)
  for w in %w(left right top bottom)
    mine = self.send(w)
    theirs = other.send(w)
    if mine.to_bp(t) < theirs.to_bp(t)
      self.send("#{w}=", theirs)
    end
  end
end

#margins ⇒ Object

Returns the dimensions composing the MarginsBox, in the order left, right, top, bottom, suitable for feeding to MarginsBox.new.



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# File 'lib/ctioga2/graphics/types/boxes.rb', line 121

def margins
  return [@left, @right, @top, @bottom]
end

#to_frame_coordinates(t) ⇒ Object 



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# File 'lib/ctioga2/graphics/types/boxes.rb', line 100

def to_frame_coordinates(t)
  return [@left.to_frame(t), 1 - @top.to_frame(t),
          1 - @right.to_frame(t), @bottom.to_frame(t)]
end

#to_output(t, fact = 1.0) ⇒ Object

Converts to output coordinates



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# File 'lib/ctioga2/graphics/types/boxes.rb', line 106

def to_output(t, fact = 1.0)
  a = to_frame_coordinates(t)
  4.times do |i|
    a[i] = if (i % 2 == 0) 
             fact * t.convert_page_to_output_x(t.convert_frame_to_page_x(a[i]))
           else
             fact * t.convert_page_to_output_y(t.convert_frame_to_page_y(a[i]))
           end
  end
  return a
end