ruby-****@sourc*****
ruby-****@sourc*****
2013年 3月 20日 (水) 09:48:54 JST
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REMOTE_ADDR = 184.145.81.215
REMOTE_HOST =
URL = http://ruby-gnome2.sourceforge.jp/hiki.cgi?tut-gtk2-dancr
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@@ -34,13 +34,13 @@
If you have worked with GTK+ in either its native C, or in its close relative C++ (gtkmm) environments, you may very well be aware of the two different ways graphic imaging and drawing is handled in GTK+. One, the older and original is the plain GTK approach, mostly utilizing the Gdk::Drawable class, which has gradually been replaced by the newer approach utilizing a third party ((*Cairo*)) 2D graphics library ( see: http://cairographics.org/ ), though it has to be added, that since GTK version 2.8, Cairo is part of the GTK system.
:Contents At the Glance:
- (12.0.1.1){{br}}{{image_left("1201-img01-gtk-backgrounds-s2.png")}}
+ (12.0.1.1){{br}}{{image_left("1200-img01-gtk-backgrounds-s2.png")}}
Let's look at the images here to get an idea what is going to be the starting point of our study in this chapter.
Here on the left you see a few examples of plain original GTK approach, utilizing the Gdk::Drawable class. We manage the background image of the drawable widget. In one case the single stretchable image is used, in the other multiple tailed images appear as the background. In either case you are able to use a graphic pen/brush like feature to draw, as well as 'undo' your drawing by pressing delete key.
{{br}}
- {{image_right("1201-img02-ruby-cairo-is-comming-s2.png")}}
+ {{image_right("1200-img02-ruby-cairo-is-comming-s2.png")}}
On the right you can see a few very simple Cairo sample programs, that a novice to Ruby GTK/Cairo programming may find in different 'non-Ruby' tutorials on the Internet, and that may seem to be very hard if not impossible to implement in Ruby. Yet, as you can see there is a way!