class Magick::Image::View::Rows

Magick::Image::View::Rows

Public Class Methods

new(view, width, height, rows) click to toggle source
# File lib/RMagick.rb, line 1124
def initialize(view, width, height, rows)
    @view = view
    @width = width
    @height = height
    @rows = rows
end

Public Instance Methods

[](*args) click to toggle source
# File lib/RMagick.rb, line 1131
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
[]=(*args) click to toggle source
# File lib/RMagick.rb, line 1149
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
update(pixel) click to toggle source

A pixel has been modified. Tell the view.

# File lib/RMagick.rb, line 1166
def update(pixel)
    changed
    notify_observers(self)
    pixel.delete_observer(self) # Don't need to hear again.
    nil
end