Class: Wx::SF::LayoutCircle

Inherits:
LayoutAlgorithm show all
Defined in:
lib/wx/shapes/auto_layout.rb

Overview

Class encapsulating algorithm which layouts all top-most shapes into circle registered under “Circle” name. The algorithm doesn’t optimize connection lines crossing.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from LayoutAlgorithm

#get_bounding_box, #get_shapes_center, #get_shapes_extent, #get_top_left

Constructor Details

#initialize ⇒ LayoutCircle

Constructor.



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# File 'lib/wx/shapes/auto_layout.rb', line 75

def initialize
  @distance_ratio = 1.0
end

Instance Attribute Details

#distance_ratio ⇒ Object

Get or set ratio in which calculated distance between shapes will be reduced. Values less than 1 means that the distance will be smaller, values bigger than 1 means that the distance will be bigger.



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# File 'lib/wx/shapes/auto_layout.rb', line 82

def distance_ratio
  @distance_ratio
end

Instance Method Details

#do_layout(shapes) ⇒ Object

Function performing the layout change.

Parameters:

  • shapes (Array<Shape>) —

    List of shapes which should be layout-ed



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# File 'lib/wx/shapes/auto_layout.rb', line 86

def do_layout(shapes)
  size_shapes = get_shapes_extent(shapes)
  center = get_shapes_center(shapes)

  # double x, y
  step = 360.0 / shapes.size
  degree = 0
  rx = (size_shapes.x / 2) * @distance_ratio
  ry = (size_shapes.y / 2) * @distance_ratio

  shapes.each do |shape|
    x = center.x + Math.cos(degree * Math::PI / 180 ) * rx
    y = center.y + Math.sin( degree * Math::PI / 180 ) * ry
    degree += step
    shape.move_to(x, y)
  end
end