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<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="fontchooserwidget.js" xml:lang="ca">
<info>
<title type="text">FontChooserWidget (JavaScript)</title>
<link type="guide" xref="beginner.js#font-selectors"/>
<revision version="0.2" date="2013-06-25" status="review"/>
<credit type="author copyright">
<name>Meg Ford</name>
<email its:translate="no">megford@gnome.org</email>
<years>2013</years>
</credit>
<desc>A widget to choose a font</desc>
</info>
<title>FontChooserWidget</title>
<media type="image" mime="image/png" src="media/fontchooserwidget.png"/>
<p>A FontChooserWidget with a callback function.</p>
<links type="section"/>
<section id="code">
<title>Code used to generate this example</title>
<code mime="application/javascript" style="numbered">//!/usr/bin/gjs
const Gtk = imports.gi.Gtk;
const Lang = imports.lang;
const FontChooserWidgetExample = new Lang.Class ({
Name: 'Font Chooser Widget Example',
// Create the application itthis
_init: function () {
this.application = new Gtk.Application({ application_id: 'org.example.fontchooserwidget' });
// Connect 'activate' and 'startup' signals to the callback functions
this.application.connect('activate', Lang.bind(this, this._onActivate));
this.application.connect('startup', Lang.bind(this, this._onStartup));
},
// Callback function for 'activate' signal presents windows when active
_onActivate: function() {
this.window.present();
},
// Callback function for 'startup' signal builds the UI
_onStartup: function() {
this._buildUI ();
},
// Build the application's UI
_buildUI: function() {
// Create the application window
this.window = new Gtk.ApplicationWindow ({ application: this.application,
window_position: Gtk.WindowPosition.CENTER,
title: "FontChooserWidget",
default_width: 200,
default_height: 200,
border_width: 10 });
this.fontChooser = new Gtk.FontChooserWidget();
// a default font
this.fontChooser.set_font("Sans");
// a text to preview the font
this.fontChooser.set_preview_text("This is an example of preview text!");
// connect signal from the font chooser to the callback function
this.fontChooser.connect("notify::font", Lang.bind(this, this._fontCb));
// add the font chooser to the window
this.window.add(this.fontChooser);
this.window.show_all();
},
// callback function:
_fontCb: function() {
// print in the terminal
print("You chose the font " + this.fontChooser.get_font());
}
});
// Run the application
let app = new FontChooserWidgetExample();
app.application.run (ARGV);
</code>
</section>
<section id="references">
<title>API References</title>
<p>In this sample we used the following:</p>
<list>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkFontChooserWidget.html">GtkFontChooserWidget</link></p></item>
</list>
</section>
</page>
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