1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
#!/usr/bin/env ruby
=begin
pangorenderer.rb - Ruby/GTK sample script.
Copyright (c) 2005,2006 Ruby-GNOME2 Project Team
This program is licenced under the same licence as Ruby-GNOME2.
$Id: pangorenderer.rb,v 1.5 2006/06/17 13:18:12 mutoh Exp $
=end
require 'gtk2'
RADIUS = 80
N_WORDS = 16
if str = Gtk.check_version(2, 6, 0)
puts "This sample requires GTK+ 2.6.0 or later"
puts str
exit
end
win = Gtk::Window.new("Gdk::PangoRenderer sample")
win.signal_connect("destroy"){Gtk.main_quit}
win.set_default_size(400, 400)
win.realize
matrix = Pango::Matrix.new
renderer = Gdk::PangoRenderer.default
renderer.drawable = win.window
renderer.gc = Gdk::GC.new(win.window)
width, height = win.size
device_radius = [width, height].min / 6.0
matrix.translate!(device_radius + (width - 2 * device_radius) / 2.0,
device_radius + (height - 2 * device_radius) / 2.0)
matrix.scale!(device_radius / RADIUS, device_radius / RADIUS)
context = Gdk::Pango.context
layout = Pango::Layout.new(context)
layout.text = "Ruby-GNOME2"
layout.font_description = Pango::FontDescription.new("Sans Bold 14")
background = Gdk::Color.new(65535, 65535, 65535)
Gdk::Colormap.system.alloc_color(background, false, true)
win.window.background = background
win.signal_connect("expose_event") do
(0...N_WORDS).each do |i|
rotated_matrix = matrix.dup
angle = 360 * i / N_WORDS.to_f
color = Gdk::Color.new(65535 * rand, 65535 * rand, 65535 * rand)
renderer.set_override_color(Pango::Renderer::PART_FOREGROUND, color)
rotated_matrix.rotate!(angle)
context.set_matrix(rotated_matrix)
layout.context_changed
width, height = layout.size
renderer.draw_layout(layout, width / 2, RADIUS * Pango::SCALE)
end
end
win.show_all
Gtk.main
|
