67 lines
1.7 KiB
Ruby
67 lines
1.7 KiB
Ruby
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#!/usr/bin/env ruby
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=begin
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pangorenderer.rb - Ruby/GTK sample script.
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Copyright (c) 2005,2006 Ruby-GNOME2 Project Team
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This program is licenced under the same licence as Ruby-GNOME2.
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$Id: pangorenderer.rb,v 1.5 2006/06/17 13:18:12 mutoh Exp $
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=end
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require 'gtk2'
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RADIUS = 80
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N_WORDS = 16
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if str = Gtk.check_version(2, 6, 0)
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puts "This sample requires GTK+ 2.6.0 or later"
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puts str
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exit
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end
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win = Gtk::Window.new("Gdk::PangoRenderer sample")
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win.signal_connect("destroy"){Gtk.main_quit}
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win.set_default_size(400, 400)
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win.realize
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matrix = Pango::Matrix.new
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renderer = Gdk::PangoRenderer.default
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renderer.drawable = win.window
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renderer.gc = Gdk::GC.new(win.window)
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width, height = win.size
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device_radius = [width, height].min / 6.0
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matrix.translate!(device_radius + (width - 2 * device_radius) / 2.0,
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device_radius + (height - 2 * device_radius) / 2.0)
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matrix.scale!(device_radius / RADIUS, device_radius / RADIUS)
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context = Gdk::Pango.context
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layout = Pango::Layout.new(context)
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layout.text = "Ruby-GNOME2"
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layout.font_description = Pango::FontDescription.new("Sans Bold 14")
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background = Gdk::Color.new(65535, 65535, 65535)
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Gdk::Colormap.system.alloc_color(background, false, true)
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win.window.background = background
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win.signal_connect("expose_event") do
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(0...N_WORDS).each do |i|
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rotated_matrix = matrix.dup
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angle = 360 * i / N_WORDS.to_f
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color = Gdk::Color.new(65535 * rand, 65535 * rand, 65535 * rand)
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renderer.set_override_color(Pango::Renderer::PART_FOREGROUND, color)
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rotated_matrix.rotate!(angle)
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context.set_matrix(rotated_matrix)
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layout.context_changed
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width, height = layout.size
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renderer.draw_layout(layout, width / 2, RADIUS * Pango::SCALE)
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end
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end
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win.show_all
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Gtk.main
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