71 lines
1.8 KiB
Ruby
71 lines
1.8 KiB
Ruby
|
=begin header
|
||
|
|
|
||
|
|
gammacurve.rb - a part of testgtk.c rewritten in Ruby/GTK2
|
||
|
|
|
||
|
|
Copyright (C) 2002-2005 Ruby-GNOME2 Project Team
|
||
|
|
|
||
|
|
$Id: gammacurve.rb,v 1.6 2005/07/17 16:55:27 mutoh Exp $
|
||
|
|
|
||
|
|
Rewritten by TAKAHASHI Hitoshi <thitoshi@ne.scphys.kyoto-u.ac.jp>
|
||
|
|
|
||
|
|
Original Copyright:
|
||
|
|
|
||
|
|
GTK - The GIMP Toolkit
|
||
|
|
Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
|
||
|
|
|
||
|
|
This library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Library General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
This library is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public
|
||
|
|
License along with this library; if not, write to the
|
||
|
|
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||
|
|
Boston, MA 02111-1307, USA.
|
||
|
|
|
||
|
|
=end
|
||
|
|
|
||
|
|
require 'sample'
|
||
|
|
|
||
|
|
class GammaCurveSample < SampleWindow
|
||
|
|
include Math
|
||
|
|
|
||
|
|
def initialize
|
||
|
|
super("Gtk::GammaCurve")
|
||
|
|
set_border_width(10)
|
||
|
|
|
||
|
|
@curve = Gtk::GammaCurve.new
|
||
|
|
add(@curve)
|
||
|
|
@count = 0
|
||
|
|
end
|
||
|
|
|
||
|
|
def update
|
||
|
|
max = 127 + (@count % 2) * 128
|
||
|
|
@curve.curve.set_range(0, max, 0, max)
|
||
|
|
vec = []
|
||
|
|
max.times do |i|
|
||
|
|
vec[i] = (127 / sqrt(max)) * sqrt(i)
|
||
|
|
end
|
||
|
|
@curve.curve.set_vector(max, vec)
|
||
|
|
@count += 1
|
||
|
|
end
|
||
|
|
|
||
|
|
attr_reader :count
|
||
|
|
|
||
|
|
def GammaCurveSample.invoke
|
||
|
|
@singleton = new if @singleton.nil? or @singleton.destroyed?
|
||
|
|
@singleton.update
|
||
|
|
unless @singleton.visible?
|
||
|
|
@singleton.show_all
|
||
|
|
end
|
||
|
|
if @singleton.count == 4
|
||
|
|
@singleton.destroy
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|