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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="de">
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<info>
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<title type="text">FontChooserWidget (JavaScript)</title>
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<link type="guide" xref="beginner.js#font-selectors"/>
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<revision version="0.2" date="2013-06-25" status="review"/>
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<credit type="author copyright">
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<name>Meg Ford</name>
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<email its:translate="no">megford@gnome.org</email>
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<years>2013</years>
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</credit>
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<desc>A widget to choose a font</desc>
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<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
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<mal:name>Mario Blättermann</mal:name>
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<mal:email>mario.blaettermann@gmail.com</mal:email>
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<mal:years>2011, 2013</mal:years>
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</mal:credit>
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</info>
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<title>FontChooserWidget</title>
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<media type="image" mime="image/png" src="media/fontchooserwidget.png"/>
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A FontChooserWidget with a callback function.
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<links type="section"/>
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<section id="code">
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<title>Code used to generate this example</title>
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//!/usr/bin/gjs
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imports.gi.versions.Gtk = '3.0';
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const Gtk = imports.gi.Gtk;
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class FontChooserWidgetExample {
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// Create the application itthis
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constructor() {
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this.application = new Gtk.Application({ application_id: 'org.example.fontchooserwidget' });
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// Connect 'activate' and 'startup' signals to the callback functions
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this.application.connect('activate', this._onActivate.bind(this));
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this.application.connect('startup', this._onStartup.bind(this));
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}
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// Callback function for 'activate' signal presents windows when active
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_onActivate() {
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this.window.present();
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}
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// Callback function for 'startup' signal builds the UI
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_onStartup() {
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this._buildUI();
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}
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// Build the application's UI
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_buildUI() {
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// Create the application window
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this.window = new Gtk.ApplicationWindow ({ application: this.application,
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window_position: Gtk.WindowPosition.CENTER,
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title: "FontChooserWidget",
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default_width: 200,
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default_height: 200,
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border_width: 10 });
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this.fontChooser = new Gtk.FontChooserWidget();
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// a default font
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this.fontChooser.set_font("Sans");
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// a text to preview the font
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this.fontChooser.set_preview_text("This is an example of preview text!");
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// connect signal from the font chooser to the callback function
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this.fontChooser.connect("notify::font", this._fontCb.bind(this));
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// add the font chooser to the window
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this.window.add(this.fontChooser);
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this.window.show_all();
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}
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// callback function:
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_fontCb() {
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// print in the terminal
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print("You chose the font " + this.fontChooser.get_font());
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}
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};
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// Run the application
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let app = new FontChooserWidgetExample();
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app.application.run (ARGV);
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</section>
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<section id="references">
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<title>API-Referenzen</title>
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In this sample we used the following:
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<list>
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<item><link href="http://developer.gnome.org/gtk3/unstable/GtkFontChooserWidget.html">GtkFontChooserWidget</link> </item>
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</list>
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</section>
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</page>
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