ruby-****@lists*****
ruby-****@lists*****
2003年 7月 8日 (火) 23:26:04 JST
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REMOTE_ADDR = 210.249.204.48
REMOTE_HOST =
URL = http://ruby-gnome2.sourceforge.jp/?tips_signals
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= Investigate Signal behaviors
How do you find signals which you need?
Some representative signals are found in many samples, but others can't find anywhere even GTK+ API documents.
This is the introduction how I find it.
== 1 Try all signals in the widget which I need
When I want to know the signals behaviors, I write test scripts as below at first.
Try to click the widget, to press the keyboards, move the widget, then you can investigate which/when signals are emitted.
require 'gtk2'
Gtk.init
widget = Gtk::Button.new("click") #(1)
Gtk::Button.signals(false).each do |v| #(2)
p v
widget.signal_connect(v) do
p "#{v} is occured."
end
end
Gtk::Window.new.set_default_size(100, 100).add(widget).show_all
Gtk.main
This example which use Gtk::Button. But also you can investigate other Widget/Signals to change (1) and (2).
If you need to know superclass's signals, set true to GLib::MetaInterface.signals().
== 2 Investigate a signal deeply
Then, you find some signals to investigate deeply, try the script below.
require 'gtk2'
Gtk.init
v = "clicked" #(1)
widget = Gtk::Button.new("click") #(2)
widget.signal_connect(v) do
p "#{v} is occured."
end
Gtk::Window.new.set_default_size(100, 100).add(widget).show_all
Gtk.main
Change (1), (2) as you need.
- ((<Masao>))
-------------------------
= Investigate Signal behaviors
How do you find signals which you need?
Some representative signals are found in many samples, but others can't find anywhere even GTK+ API documents.
This is the introduction how I find it.
== 1 Try all signals in the widget which I need
When I want to know the signals behaviors, I write test scripts as below at first.
Try to click the widget, to press the keyboards, move the widget, then you can investigate which/when signals are emitted.
require 'gtk2'
Gtk.init
widget = Gtk::Button.new("click") #(1)
Gtk::Button.signals(false).each do |v| #(2)
p v
widget.signal_connect(v) do
p "#{v} is occured."
end
end
Gtk::Window.new.set_default_size(100, 100).add(widget).show_all
Gtk.main
This is a example which use Gtk::Button. But also you can investigate other Widget/Signals to change (1) and (2).
If you need to know superclass's signals, set true to GLib::MetaInterface.signals().
== 2 Investigate a signal deeply
Then, you find some signals to investigate deeply, try the script below.
require 'gtk2'
Gtk.init
v = "clicked" #(1)
widget = Gtk::Button.new("click") #(2)
widget.signal_connect(v) do
p "#{v} is occured."
end
Gtk::Window.new.set_default_size(100, 100).add(widget).show_all
Gtk.main
Change (1), (2) as you need.
- ((<Masao>))