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Viewing changes to sample/kof2005/high-light-expose.rb

  • Committer: Bazaar Package Importer
  • Author(s): Youhei SASAKI
  • Date: 2009-07-22 22:15:37 UTC
  • Revision ID: james.westby@ubuntu.com-20090722221537-iy7foj73p2kyuumi
Tags: upstream-0.6.1
Import upstream version 0.6.1

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sample/kof2005/high-light-expose.rb
 
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#!/usr/bin/env ruby
 
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require 'gtk2'
 
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Gtk.init
 
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class Widget < Gtk::EventBox
 
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  def initialize
 
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    super
 
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    set_visible_window(false)
 
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    add_events(Gdk::Event::ENTER_NOTIFY_MASK)
 
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    add_events(Gdk::Event::LEAVE_NOTIFY_MASK)
 
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    set_enter_notify
 
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    set_leave_notify
 
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    set_expose_after
 
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    @entered = false
 
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  end
 
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  def set_enter_notify
 
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    signal_connect("enter_notify_event") do |widget, event|
 
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      @entered = true
 
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      queue_draw
 
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      false
 
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    end
 
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  end
 
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  def set_leave_notify
 
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    signal_connect("leave_notify_event") do |widget, event|
 
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      @entered = false
 
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      queue_draw
 
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      false
 
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    end
 
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  end
 
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  def set_expose_after
 
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    signal_connect_after("expose_event") do |widget, event|
 
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      if @entered
 
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        cr = widget.window.create_cairo_context
 
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        x, y, w, h = widget.allocation.to_a
 
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        line_width = cr.line_width / 2
 
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        x += line_width
 
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        y += line_width
 
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        w -= line_width * 2
 
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        h -= line_width * 2
 
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        cr.rectangle(x, y, w, h)
 
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        cr.set_source_rgba([0, 0, 1, 0.6])
 
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        cr.stroke
 
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      end
 
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      false
 
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    end
 
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  end
 
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end
 
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window = Gtk::Window.new
 
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window.set_default_size(512, 400)
 
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window.signal_connect("destroy") do
 
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  Gtk.main_quit
 
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  true
 
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end
 
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window.signal_connect("key_press_event") do |widget, event|
 
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  if event.state.control_mask? and event.keyval == Gdk::Keyval::GDK_q
 
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    widget.destroy
 
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    true
 
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  else
 
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    false
 
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  end
 
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end
 
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layout = Gtk::Layout.new
 
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rect = Widget.new
 
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rect.set_size_request(260, 260)
 
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rect.signal_connect("expose_event") do |widget, event|
 
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  x, y, w, h = widget.allocation.to_a
 
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  cr = widget.window.create_cairo_context
 
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  line_width = cr.line_width / 2
 
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  x += line_width
 
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  y += line_width
 
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  w -= line_width * 2
 
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  h -= line_width * 2
 
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  rgba = [0xff, 0xf1, 0xec, 0xff].collect{|c| c / 255.0}
 
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  cr.set_source_rgba(rgba)
 
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  cr.rectangle(x, y, w, h)
 
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  cr.fill_preserve
 
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  rgba = [0xff, 0x99, 0x99, 0xff].collect{|c| c / 255.0}
 
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  cr.set_source_rgba(rgba)
 
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  cr.stroke
 
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  false
 
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end
 
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layout.put(rect, 80, 30)
 
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circ = Widget.new
 
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circ.set_size_request(250, 250)
 
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circ.signal_connect("expose_event") do |widget, event|
 
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  x, y, w, h = widget.allocation.to_a
 
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  cr = widget.window.create_cairo_context
 
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  line_width = cr.line_width / 2
 
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  x += line_width
 
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  y += line_width
 
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  w -= line_width * 2
 
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  h -= line_width * 2
 
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  rgba = [0xcc, 0xff, 0xcc, 0xff].collect{|c| c / 255.0}
 
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  cr.set_source_rgba(rgba)
 
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  r = w / 2
 
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  cr.arc(x + r , y + r, r, 0, 2 * Math::PI)
 
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  cr.fill_preserve
 
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  rgba = [0x00, 0x66, 0x00, 0xff].collect{|c| c / 255.0}
 
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  cr.set_source_rgba(rgba)
 
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  cr.stroke
 
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  false
 
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end
 
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layout.put(circ, 180, 140)
 
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window.add(layout)
 
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window.show_all
 
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Gtk.main