gtk2/docs/reference/gtk/broadway.xml
2018-05-08 06:05:41 +05:30

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<?xml version="1.0"?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
]>
<refentry id="gtk-broadway">
<refmeta>
<refentrytitle>Using GTK+ with Broadway</refentrytitle>
<manvolnum>3</manvolnum>
<refmiscinfo>GTK Library</refmiscinfo>
</refmeta>
<refnamediv>
<refname>Using GTK+ with Broadway</refname>
<refpurpose>
HTML-specific aspects of using GTK+
</refpurpose>
</refnamediv>
<refsect1>
<title>Using GTK+ with Broadway</title>
<para>
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
<literal>GDK_BACKEND=broadway</literal>. Then you can make
your application appear in a web browser by pointing it at
<literal>http://127.0.0.1:8080</literal>. Note that you need
to enable web sockets in your web browser.
</para>
<para>
You can choose a different port from the default 8080 by setting
the <envar>BROADWAY_DISPLAY</envar> environment variable to the
port that you want to use.
</para>
<para>
It is also possible to use multiple GTK+ applications in the same
web browser window, by using the Broadway server,
<command>broadwayd</command>, that ships with GTK+.
To use broadwayd, start it like this:
<programlisting>
broadwayd :5
</programlisting>
Then point your web browser at <literal>http://127.0.0.1:8085</literal>.
Start your applications like this:
<programlisting>
GDK_BACKEND=broadway BROADWAY_DISPLAY=:5 gtk4-demo
</programlisting>
</para>
<refsect2 id="broadway-envar">
<title>Broadway-specific environment variables</title>
</refsect2>
<formalpara>
<title><envar>BROADWAY_DISPLAY</envar></title>
<para>
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:
<programlisting>
<replaceable>port</replaceable> = 8080 + <replaceable>display</replaceable>
</programlisting>
</para>
</formalpara>
</refsect1>
</refentry>