ruby-****@sourc*****
ruby-****@sourc*****
2003年 9月 11日 (木) 01:18:29 JST
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REMOTE_ADDR = 218.231.205.39
REMOTE_HOST =
URL = http://ruby-gnome2.sourceforge.jp/?tips_toolbar_icon
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- = Change an icon on a button of a toolbar
+ = Changes an icon on a button of a toolbar
Gtk::Toolbar and also a lot of widgets is a subclass of Gtk::Container or Gtk::Bin. They have child widgets and you can get each child widgets and send methods to the child widgets.
Here is a sample script.
require 'gtk2'
Gtk.init
toolbar = Gtk::Toolbar.new
toolbar.append(Gtk::Stock::NEW) do
toolbar.children[0].child.children[0].set(Gtk::Stock::QUIT, Gtk::IconSize::SMALL_TOOLBAR) #(1)
end
Gtk::Window.new.add(toolbar).show_all
Gtk.main
Click button, then icon will be changed.
a line of (1) can also write like as follows:
#Of course, you can use both way as you like.
button = toolbar.children[0]
vbox = button.child
image = vbox.children[0]
image.set(Gtk::Stock::QUIT, Gtk::IconSize::SMALL_TOOLBAR)
And follow image shows these objects relationship.
((<Containers|URL:/ja/hiki.cgi?c=plugin;plugin=attach_download;p=tips_toolbar;file_name=containers.jpg>))
{{br}}
(1) Gtk::Toolbar is a subclass of Gtk::Container. So you can get all child widgets by Gtk::Container#children. Then, the first child is the target object(Gtk::Button). So you get here by toolbar.children[0].
(2) Gtk::Button is a subclass of Gtk::Bin, so it has a child only. You can get the child widget by Gtk::Bin#child. In this case, the child widget is Gtk::VBox.
(3) Gtk::VBox is a subclass of Gtk::Container, too. So you get Gtk::Image by vbox.children[0].
(4) Use Gtk::Image#set to change the icon.
- - ((<Masao>))
+ == ChangeLog
+ :2003-09-11 ((<Masao>))
+ Initial release.