ruby-****@sourc*****
ruby-****@sourc*****
2013年 3月 23日 (土) 15:01:51 JST
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REMOTE_ADDR = 70.49.48.128
REMOTE_HOST =
URL = http://ruby-gnome2.sourceforge.jp/hiki.cgi?tut-gtk2-dancr-rbcatut
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@@ -114,18 +114,17 @@
Indeed, to create the template we are going to use the code shown in the above 'minimal-rb-cr.rb'program. Eventually, the new template will act as wrapper code, with a stub method called((*draw(cr, drawing_area).*)) Basically, the template is an executable program in which you create a new class inheriting directly from the CairoWindow, and overriding its((*draw*))method. This 'draw' method is where you will place your cairo code. Lets look at the empty ready to use template:
#!/usr/bin/env ruby
-
$: << '~/work/HikiLib'
require 'hiki2-gtk-w-cairo.rb'
include HikiGtk
-
class MyCairoCodeClass < CairoWindow # Your own CairoWindow class
def draw(cr, drawing_area) # Override the draw method
width, height = drawing_area.window.size # You will likely need w, h
- o o o # Your code comes here
+ # Your code comes here: #
+ # --------------------- #
+ o o o # Your code comes here.
end #
end #
-
window=MyCairoCodeClass.new # Replace 'CairoWindow' with your new class name.
# Optionally, supply the your name to the constructor.
window.show_all
@@ -136,32 +135,29 @@
:A Real Life Example With Runing Cairo Code
(12.3.0.1.2.2) {{image_right("1203-smiley-face-s1.png")}}
- In Michael Urman's Cairo tutorial called ((<Cairo Tutorial for PyGTK Programmers|URL:http://www.tortall.net/mu/wiki/PyGTKCairoTutorial>)), where Nichael also creates a similar Gtk/Cairo framework as is ours, you can find a neat piece of Python cairo code generating a((*smiley face.*)) I translated his smiley face Python code to Ruby, and run it in our Ruby Gtk/Cairo wrapper.
+ In Michael Urman's Cairo tutorial called ((<Cairo Tutorial for PyGTK Programmers|URL:http://www.tortall.net/mu/wiki/PyGTKCairoTutorial>)), where Michael creates a similar Gtk/Cairo framework as is ours, you can find a neat piece of Python cairo code generating a((*smiley face.*)) I translated his smiley face Python code to Ruby, and run it in our Ruby Gtk/Cairo wrapper.
((*smiley-face.rb*))
#!/usr/bin/env ruby
-
$: << '~/work/HikiLib'
require 'hiki2-gtk-w-cairo.rb'
include HikiGtk
class SmileyFace < CairoWindow
-
def draw(cr, drawing_area)
width, height = drawing_area.window.size
-
+
+ # Your code comes here:
+ # ---------------------
# Fill the background with a colour of your choice
cr.set_source_rgb(0.5, 0.5, 0.9)
cr.rectangle(0, 0, width, height)
cr.fill()
-
# draw a rectangle
cr.set_source_rgb(1.0, 1.0, 1.0)
cr.rectangle(10, 10, width - 20, height - 20)
cr.fill()
-
# and a circle
cr.set_source_rgb(1.0, 0.0, 0.0)
radius = [width, height].min
@@ -169,7 +166,3 @@
cr.stroke()
cr.arc(width / 2.0, height / 2.0, radius / 3.0 - 10, Math::PI / 3, 2 * Math::PI / 3)
cr.stroke()
-
# draw lines
cr.set_source_rgb(0.0, 0.0, 0.8)
cr.move_to(width / 3.0, height / 3.0)
@@ -177,6 +173,3 @@
cr.move_to(2 * width / 3.0, height / 3.0)
cr.rel_line_to(0, height / 6.0)
cr.stroke()
+ # ---------------------
end
end