# File lib/rmagick_internal.rb, line 1114 def initialize(view, width, height, rows) @view = view @width = width @height = height @rows = rows end
# File lib/rmagick_internal.rb, line 1121 def [](*args) cols(args) # Both View::Pixels and Magick::Pixel implement Observable if @unique pixels = @view[@rows[0]*@width + @cols[0]] pixels.add_observer(self) else pixels = View::Pixels.new each do |x| p = @view[x] p.add_observer(self) pixels << p end end pixels end
# File lib/rmagick_internal.rb, line 1139 def []=(*args) rv = args.delete_at(-1) # get rvalue if ! rv.is_a?(Pixel) # must be a Pixel or a color name begin rv = Pixel.from_color(rv) rescue TypeError Kernel.raise TypeError, "cannot convert #{rv.class} into Pixel" end end cols(args) each { |x| @view[x] = rv.dup } changed notify_observers(self) nil end
A pixel has been modified. Tell the view.
# File lib/rmagick_internal.rb, line 1156 def update(pixel) changed notify_observers(self) pixel.delete_observer(self) # Don't need to hear again. nil end