Class: Mir::PixelBoard

Inherits:
Gtk::DrawingArea
  • Object
show all
Defined in:
lib/mir/02_viewer.rb

Instance Method Summary collapse

Constructor Details

#initialize(image) ⇒ PixelBoard

Returns a new instance of PixelBoard.



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# File 'lib/mir/02_viewer.rb', line 5

def initialize image
  super()
  @image=image
  override_background_color(:normal, Gdk::RGBA.new(0, 0, 0, 1))
  signal_connect "draw" do
    on_expose
  end
end

Instance Method Details

#draw_pixels(cr) ⇒ Object 



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# File 'lib/mir/02_viewer.rb', line 19

def draw_pixels cr
  @image.size.y.times do |y|
    @image.size.x.times do |x|
      pix=@image[y,x]
      r,g,b=pix.to_a.map{|v| v/255.0}
      xx,yy=x*3,y*3
      cr.set_source_rgb r,g,b
      cr.rectangle(x, y,1,1)
      cr.stroke
    end
  end
end

#on_expose ⇒ Object 



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# File 'lib/mir/02_viewer.rb', line 14

def on_expose
  cr = window.create_cairo_context
  draw_pixels cr
end