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<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" type="guide" style="task" id="aboutdialog.vala" xml:lang="gl">
<info>
<link type="guide" xref="beginner.vala#windows"/>
<revision version="0.1" date="2012-04-07" status="stub"/>
<credit type="author copyright">
<name>Ryan Lortie</name>
<email>desrt@desrt.ca</email>
<years>2012</years>
</credit>
<credit type="author">
<name>Tiffany Antopolski</name>
<email>tiffany.antopolski@gmail.com</email>
</credit>
<desc>Display information about an application</desc>
</info>
<title>AboutDialog</title>
<media type="image" mime="image/png" src="media/aboutdialog.png"/>
<p>An AboutDialog example using Gtk.Application</p>
<note><p><em style="bold">You need to be running Gtk3.4 or later for this to work</em></p></note>
<code mime="text/x-vala" style="numbered"><![CDATA[
//A window in the application
public class Window : Gtk.ApplicationWindow {
public Window (Application app) {
Object (application: app, title: "AboutDialog Example");
this.set_default_size (400, 200);
var button = new Gtk.Button.with_label ("About");
button.clicked.connect (about_clicked);
this.add (button);
this.show_all ();
}
void about_clicked () {
string[] authors = { "GNOME Documentation Team", null };
string[] documenters = {"GNOME Documentation Team", null };
Gtk.show_about_dialog (this,
"program-name", ("AboutDialog Example"),
"copyright", ("Copyright \xc2\xa9 2012 GNOME Documentation Team"),
"authors", authors,
"documenters", documenters,
"website", "http://developer.gnome.org",
"website-label", ("GNOME Developer Website"),
null);
}
}
//This is the Application
public class Application : Gtk.Application {
protected override void activate () {
new Window (this);
}
public Application () {
Object (application_id: "org.example.application");
}
}
//main function creates Application and runs it
int main (string[] args) {
return new Application ().run (args);
}
]]></code>
<p>
In this sample we used the following:
</p>
<list>
<item><p><link href="http://references.valadoc.org/#!api=gtk+-3.0/Gtk.Application">Gtk.Application</link></p></item>
<item><p><link href="http://references.valadoc.org/#!api=gtk+-3.0/Gtk.ApplicationWindow">Gtk.ApplicationWindow</link></p></item>
<item><p><link href="http://www.valadoc.org/#!api=gtk+-3.0/Gtk.Window.set_default_size">set_default_size</link></p></item>
<item><p><link href="http://www.valadoc.org/#!api=gtk+-2.0/Gtk.Button.Button.with_label">Gtk.Button.with_label</link></p></item>
</list>
</page>
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