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<h2><span class="refentrytitle">Using GTK+ with Broadway</span></h2>
<p>Using GTK+ with Broadway —
HTML-specific aspects of using GTK+
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<div class="refsect1">
<a name="id-1.8.8.3"></a><h2>Using GTK+ with Broadway</h2>
<p>
The GDK Broadway backend provides support for displaying GTK+
applications in a web browser, using HTML5 and web sockets. To run
your application in this way, select the Broadway backend by setting
<code class="literal">GDK_BACKEND=broadway</code>. Then you can make
your application appear in a web browser by pointing it at
<code class="literal">http://127.0.0.1:8080</code>. Note that you need
to enable web sockets in your web browser.
</p>
<p>
You can choose a different port from the default 8080 by setting
the <code class="envar">BROADWAY_DISPLAY</code> environment variable to the
port that you want to use.
</p>
<p>
It is also possible to use multiple GTK+ applications in the same
web browser window, by using the Broadway server,
<span class="command"><strong>broadwayd</strong></span>, that ships with GTK+.
To use broadwayd, start it like this:
</p>
<pre class="programlisting">
broadwayd :5
</pre>
<p>
Then point your web browser at <code class="literal">http://127.0.0.1:8085</code>.
Start your applications like this:
</p>
<pre class="programlisting">
GDK_BACKEND=broadway BROADWAY_DISPLAY=:5 gtk3-demo
</pre>
<p>
</p>
<div class="refsect2">
<a name="broadway-envar"></a><h3>Broadway-specific environment variables</h3>
</div>
<p><b><code class="envar">BROADWAY_DISPLAY</code>. </b>
Specifies the Broadway display number. The default display is 0.
The display number determines the port to use when connecting
to a Broadway application via the following formula:
</p>
<pre class="programlisting">
<em class="replaceable"><code>port</code></em> = 8080 + <em class="replaceable"><code>display</code></em>
</pre>
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