module Rabbit::Renderer::Display::Mask

Constants

MASK_SIZE_STEP

Public Class Methods

new(*args, &block) click to toggle source
Calls superclass method
# File lib/rabbit/renderer/display/mask.rb, line 9
def initialize(*args, &block)
  super
  init_mask
end

Public Instance Methods

expand_hole() click to toggle source
# File lib/rabbit/renderer/display/mask.rb, line 14
def expand_hole
  if @mask_size < 0
    @mask_size = MASK_SIZE_STEP
  else
    @mask_size = [@mask_size + MASK_SIZE_STEP, 1.0].min
  end
  set_hole
end
narrow_hole() click to toggle source
# File lib/rabbit/renderer/display/mask.rb, line 23
def narrow_hole
  if @mask_size < 0
    @mask_size = 0
  else
    @mask_size = [@mask_size - MASK_SIZE_STEP, 0.0].max
  end
  set_hole
end
set_hole() click to toggle source
# File lib/rabbit/renderer/display/mask.rb, line 32
def set_hole
  if @mask_size <= 0
    @window.shape_combine_region(nil)
  else
    _size = size
    w, h = _size.real_width, _size.real_height
    @mask = Cairo::Region.new
    @mask.union!(0, 0, w, h)
    if @mask_size < 1.0
      mw = w * @mask_size
      mh = h * @mask_size
      mx = (w - mw) / 2
      my = (h - mh) / 2
      @mask.subtract!(mx, my, mw, mh)
    else
      @mask.subtract!(0, 0, w - 1, h)
    end
    @window.shape_combine_region(@mask)
  end
  redraw
  update_title # for xfwm
end

Private Instance Methods

init_mask() click to toggle source
# File lib/rabbit/renderer/display/mask.rb, line 56
def init_mask
  @mask_size = 0
end