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<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" type="guide" style="task" id="button.vala" xml:lang="el">
<info>
<link type="guide" xref="beginner.vala#buttons"/>
<revision version="0.1" date="2012-02-21" status="stub"/>
<credit type="author copyright">
<name>Tiffany Antopolski</name>
<email>tiffany.antopolski@gmail.com</email>
<years>2012</years>
</credit>
<desc>A button widget which can be connected to other widgets.</desc>
</info>
<title>Button widget</title>
<media type="image" mime="image/png" src="media/button.png"/>
<p>A button widget connected to stdout.printf (), and a modal window.</p>
<code mime="text/x-vala" style="numbered"><![CDATA[
/*callback for the "clicked" signal.*/
void button_clicked_cb () {
stdout.printf ("You clicked the button!\n");
//TODO: add a modal window
}
int main (string[] args) {
Gtk.init (ref args);
var window = new Gtk.Window ();
window.title = "GNOME Button";
window.set_default_size (250,50);
var button = new Gtk.Button.with_label ("Click Me");
window.add (button);
window.window_position = Gtk.WindowPosition.CENTER;
/* The "clicked" signal is emitted when the
button is clicked. The signal is connected to
the button_clicked_cb method defined above.*/
button.clicked.connect (button_clicked_cb);
/*The "destroy" signal is emitted when the x
in the top right of the window is clicked.
The destroy signal is connected to the
main_quit method, which destroys the window
and exits the program.*/
window.destroy.connect (Gtk.main_quit);
window.show_all ();
Gtk.main ();
return 0;
}
]]></code>
<p>
In this sample we used the following:
<link xref="window.vala">Gtk.Window</link>,
<link href="http://www.valadoc.org/#!api=gtk+-2.0/Gtk.Button">Gtk.Button</link>
</p>
</page>
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