ruby-****@sourc*****
ruby-****@sourc*****
2013年 4月 23日 (火) 05:45:52 JST
-------------------------
REMOTE_ADDR = 70.49.50.179
REMOTE_HOST =
URL = http://ruby-gnome2.sourceforge.jp/hiki.cgi?tut-gtk2-appdx-clrtheory
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@@ -390,7 +390,7 @@
-((*display-color-shades.rb*))
+ ((*display-color-shades.rb*))
@@ -400,98 +400,98 @@
- #!/usr/bin/env ruby
- # Testing ColorBrightnessMgmt module from file 'color-brightness-mgmt.rb'
-
- $: << '~/work/HikiLib'
- require 'hiki2-gtk-w-cairo.rb'
- include HikiGtk
-
- class DrwAreaToImg < CairoWindow
- include CairoHelper
-
- def initialize(title=nil, n=4)
- super(title)
- @number_of_shades_on_one_side=n
- @unit = 1.0
- @step = @unit/n
- @color_box_w = @unit * 0.65
- @color_box_h = @unit / 3
- @hgap = (@unit - @color_box_w) / 7
- @vgap = 3*@hgap
- # @cr ... instance variable is initialized only after {{ draw }} method is called.
- end
-
- def draw(cr, drawing_area)
- # NOTE the peculiarity here, cairo context instance variable can be
- # initialized, only after 'draw' method is called with the context
- # parameter (cr).
- @cr = cr
- cr.scale(100, 100) # (100, 100) # Examples are in 1x1 coordinate space
- cr.line_width = 0.01
- # Display the color grid.
- base_color_names.each_with_index do |color, line|
- display_line_of_shades_for_color(color, line)
+ #!/usr/bin/env ruby
+ # Testing ColorBrightnessMgmt module from file 'color-brightness-mgmt.rb'
+
+ $: << '~/work/HikiLib'
+ require 'hiki2-gtk-w-cairo.rb'
+ include HikiGtk
+
+ class DrwAreaToImg < CairoWindow
+ include CairoHelper
+
+ def initialize(title=nil, n=4)
+ super(title)
+ @number_of_shades_on_one_side=n
+ @unit = 1.0
+ @step = @unit/n
+ @color_box_w = @unit * 0.65
+ @color_box_h = @unit / 3
+ @hgap = (@unit - @color_box_w) / 7
+ @vgap = 3*@hgap
+ # @cr ... instance variable is initialized only after {{ draw }} method is called.
+ end
+
+ def draw(cr, drawing_area)
+ # NOTE the peculiarity here, cairo context instance variable can be
+ # initialized, only after 'draw' method is called with the context
+ # parameter (cr).
+ @cr = cr
+ cr.scale(100, 100) # (100, 100) # Examples are in 1x1 coordinate space
+ cr.line_width = 0.01
+ # Display the color grid.
+ base_color_names.each_with_index do |color, line|
+ display_line_of_shades_for_color(color, line)
+ end
+ end
+
+ def display_line_of_shades_for_color(color, line)
+ n = @number_of_shades_on_one_side
+ cr = @cr # @cr ... is initialized only after {{ draw }} method is called.
+ w = @color_box_w
+ h = @color_box_h
+ nx = x = y = @hgap
+ ny = line * (@vgap + h) + @hgap
+
+ 0.step(2*@unit, @step).each do |v|
+ brightness = v - @unit
+ cr.save # Save original cairo context environment.
+ cr.translate(nx, ny) # Change all coordinates in cr for the following step pass.
+
+ cr.set_source_rgba(mk_cairo_acolor(color, brightness))
+ draw_closed_paths(cr, [x, y], [w, y], [w, h], [x, h], :c)
+ cr.fill
+ cr.set_source_rgba(mk_cairo_acolor(:black)) # Change font colour for defining colour code.
+ draw_closed_paths(cr, [x, y], [w, y], [w, h], [x, h], :c)
+ cr.stroke
+ if v == 0 # Write color name only into the brightest colour-xox.
+ cr.set_font_size(0.1)
+ cr.set_source_rgba(mk_cairo_acolor(:black))
+ cr.move_to(x+ ＠ hgap, y+4*@hgap)
+ cr.show_text(color.to_s)
+ end
+ # Display colour code underneath each colour box.
+ color_code = mk_rgb_color(color, brightness).upcase
+ cr.set_font_size(0.15)
+ cr.set_source_rgba(mk_cairo_acolor(brightness==0 ? :red : :black))
+ cr.move_to(@hgap, @vgap + h)
+ cr.show_text(color_code)
+ cr.restore # Restore the original cairo context envirionment, preventing
+ # accumulative effect, when setting coordinates for next
+ # color-box {{ see: cr.save & cr.translate(nx, ny) }} above.
+ nx += w + 2*@hgap
+ end # end-step-loop
+ end
+
+ # Convenience method to dynamicaly size the main Gtk window. Returns window
+ # 'width' and 'height' parameters after window object is created and after users
+ # request for number of colours is taken into account during instatiation process.
+ def get_dimensions
+ [
+ ((@number_of_shades_on_one_side * 2.0 + 1) * (@color_box_w + @vgap) - @vgap) * 100,
+ ((@color_box_h + @hgap + @vgap) * base_color_names.size - @hgap) * 100
+ ]
+ end
end
- end
-
- def display_line_of_shades_for_color(color, line)
- n = @number_of_shades_on_one_side
- cr = @cr # @cr ... is initialized only after {{ draw }} method is called.
- w = @color_box_w
- h = @color_box_h
- nx = x = y = @hgap
- ny = line * (@vgap + h) + @hgap
-
- 0.step(2*@unit, @step).each do |v|
- brightness = v - @unit
- cr.save # Save original cairo context environment.
- cr.translate(nx, ny) # Change all coordinates in cr for the following step pass.
-
- cr.set_source_rgba(mk_cairo_acolor(color, brightness))
- draw_closed_paths(cr, [x, y], [w, y], [w, h], [x, h], :c)
- cr.fill
- cr.set_source_rgba(mk_cairo_acolor(:black)) # Change font colour for defining colour code.
- draw_closed_paths(cr, [x, y], [w, y], [w, h], [x, h], :c)
- cr.stroke
- if v == 0 # Write color name only into the brightest colour-xox.
- cr.set_font_size(0.1)
- cr.set_source_rgba(mk_cairo_acolor(:black))
- cr.move_to(x+ ＠ hgap, y+4*@hgap)
- cr.show_text(color.to_s)
- end
- # Display colour code underneath each colour box.
- color_code = mk_rgb_color(color, brightness).upcase
- cr.set_font_size(0.15)
- cr.set_source_rgba(mk_cairo_acolor(brightness==0 ? :red : :black))
- cr.move_to(@hgap, @vgap + h)
- cr.show_text(color_code)
- cr.restore # Restore the original cairo context envirionment, preventing
- # accumulative effect, when setting coordinates for next
- # color-box {{ see: cr.save & cr.translate(nx, ny) }} above.
- nx += w + 2*@hgap
- end # end-step-loop
- end
-
- # Convenience method to dynamicaly size the main Gtk window. Returns window
- # 'width' and 'height' parameters after window object is created and after users
- # request for number of colours is taken into account during instatiation process.
- def get_dimensions
- [
- ((@number_of_shades_on_one_side * 2.0 + 1) * (@color_box_w + @vgap) - @vgap) * 100,
- ((@color_box_h + @hgap + @vgap) * base_color_names.size - @hgap) * 100
- ]
- end
- end
-
- # Allow setting the number of colour shades from the command line.
- num_of_shades = ARGV.size == 1 ? ARGV[0].to_f : 4
-
- title = "Display a colour grid"
- w=DrwAreaToImg.new(title, num_of_shades)
- w.set_size_request(*w.get_dimensions)
- w.show_all
- Gtk.main
+
+ # Allow setting the number of colour shades from the command line.
+ num_of_shades = ARGV.size == 1 ? ARGV[0].to_f : 4
+
+ title = "Display a colour grid"
+ w=DrwAreaToImg.new(title, num_of_shades)
+ w.set_size_request(*w.get_dimensions)
+ w.show_all
+ Gtk.main