1#!/usr/bin/env ruby
2require 'tk'
3require 'tkextlib/blt'
4
5file = File.join(File.dirname(File.expand_path(__FILE__)),
6                 'images', 'qv100.t.gif')
7if File.exist?(file)
8  src = TkPhotoImage.new(:file=>file)
9else
10  fail RuntimeError, 'no image file'
11end
12
13width = src.width
14height = src.height
15
16TkOption.add('*Label.font', '*helvetica*10*')
17TkOption.add('*Label.background', 'white')
18
19[0, 90, 180, 270, 360, 45].each_with_index{|r, i|
20  dest = TkPhotoImage.new
21  Tk::BLT::Winop.image_rotate(src, dest, r)
22  l_txt = TkLabel.new(:text=>"#{r} degrees")
23  l_img = TkLabel.new(:image=>dest)
24  Tk::BLT::Table.add(Tk.root, [0,i], l_img, [1,i], l_txt)
25  Tk.update
26}
27
28Tk.mainloop
29