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=begin
common.rb - Common class for gtk-demo.
Copyright (c) 2003-2005 Ruby-GNOME2 Project Team
This program is licenced under the same licence as Ruby-GNOME2.
$Id: common.rb,v 1.9 2005/10/15 03:41:36 mutoh Exp $
=end
require 'gtk2'
module Demo
def self.find_file(basename)
%w(. /usr/share/gtk-2.0/demo /usr/local/share/gtk-2.0/demo/).each do |dirname|
path = File.join(dirname, basename)
if File.exist?(path)
return path
end
end
raise "#{basename}: No such file or directory"
end
class BasicWindow < Gtk::Window
def initialize(title = nil)
super(Gtk::Window::TOPLEVEL)
if title
set_title("#{title} in Ruby/GTK")
end
signal_connect("key_press_event") do |widget, event|
if event.state.control_mask? and event.keyval == Gdk::Keyval::GDK_q
destroy
true
else
false
end
end
signal_connect("delete_event") do |widget, event|
quit
end
end
def quit
destroy
true
end
end
class CairoWindow < BasicWindow
def initialize(title=nil)
super
unless Gdk.cairo_available?
add_cairo_require_label
return
end
drawing_area = Gtk::DrawingArea.new
add(drawing_area)
drawing_area.signal_connect("expose_event") do |widget, event|
cr = widget.window.create_cairo_context
cr.scale(*widget.window.size)
cr.set_line_width(0.04)
cr.save do
cr.set_source_color(Gdk::Color.new(65535, 65535, 65535))
cr.gdk_rectangle(Gdk::Rectangle.new(0, 0, 1, 1))
cr.fill
end
draw(cr)
end
end
def add_cairo_require_label
message = "This sample requires GTK+ 2.8.0 or later and cairo support"
add(Gtk::Label.new(message))
end
def draw(cr)
raise "not implemented"
end
end
end
|
