<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="checkbutton.vala" xml:lang="ca">
<info>
<title type="text">CheckButton (Vala)</title>
<link type="guide" xref="beginner.vala#buttons"/>
<revision version="0.1" date="2012-05-09" status="draft"/>
<credit type="author copyright">
<name>Tiffany Antopolski</name>
<email its:translate="no">tiffany.antopolski@gmail.com</email>
<years>2012</years>
</credit>
<desc>Create widgets with a discrete toggle button</desc>
</info>
<title>CheckButton</title>
<media type="image" mime="image/png" src="media/checkbutton.png"/>
<p>This CheckButton toggles the title.</p>
<code mime="text/x-csharp" style="numbered">/* A window in the application */
class MyWindow : Gtk.ApplicationWindow {
/* The constructor */
internal MyWindow (MyApplication app) {
Object (application: app, title: "CheckButton Example");
this.set_default_size (300, 100);
this.border_width = 10;
var checkbutton = new Gtk.CheckButton.with_label ("Show Title");
/* Connect the checkbutton to the
* callback function (aka. signal handler).
*/
checkbutton.toggled.connect (this.toggled_cb);
/* Add the button to the this window */
this.add (checkbutton);
checkbutton.set_active (true);
checkbutton.show ();
}
/* The signal handler for the 'toggled' signal of the checkbutton. */
void toggled_cb (Gtk.ToggleButton checkbutton) {
if (checkbutton.get_active())
this.set_title ("CheckButton Example");
else
this.set_title ("");
}
}
/* This is the application */
class MyApplication : Gtk.Application {
/* The constructor */
internal MyApplication () {
Object (application_id: "org.example.checkbutton");
}
/* Override the activate signal of GLib.Application */
protected override void activate () {
new MyWindow (this).show ();
}
}
/* main creates and runs the application */
int main (string[] args) {
return new MyApplication ().run (args);
}
</code>
<p>
In this sample we used the following:
</p>
<list>
<item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.CheckButton.html">Gtk.CheckButton</link></p></item>
</list>
</page>