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CONTENT="Modular DocBook HTML Stylesheet Version 1.64
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TITLE="Libbonobo Reference Manual"
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HREF="index.html"><LINK
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TITLE="Libbonobo API Reference Manual"
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TITLE="bonobo-config-database"
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HREF="libbonobo-bonobo-config-database.html"><LINK
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TITLE="bonobo-exception"
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HREF="libbonobo-bonobo-exception.html"></HEAD
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>Libbonobo Reference Manual</FONT
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HREF="libbonobo-bonobo-config-database.html"
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><<< Previous Page</B
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HREF="libbonobo-bonobo-exception.html"
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>Next Page >>></B
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NAME="LIBBONOBO-BONOBO-CONTEXT"
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>bonobo-context -- Extensible runtime service interface</DIV
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CLASS="REFSYNOPSISDIV"
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HREF="libbonobo-bonobo-context.html#BONOBO-CONTEXT-GET"
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>bonobo_context_get</A
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> (const CORBA_char *context_name,
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CORBA_Environment *opt_ev);
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HREF="libbonobo-bonobo-context.html#BONOBO-CONTEXT-ADD"
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>bonobo_context_add</A
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> (const CORBA_char *context_name,
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Bonobo_Unknown context);
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HREF="libbonobo-bonobo-object.html#BONOBOOBJECT"
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HREF="libbonobo-bonobo-context.html#BONOBO-CONTEXT-RUNNING-GET"
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>bonobo_context_running_get</A
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HREF="libbonobo-bonobo-context.html#BONOBO-RUNNING-CONTEXT-AUTO-EXIT-UNREF"
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>bonobo_running_context_auto_exit_unref</A
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HREF="libbonobo-bonobo-object.html#BONOBOOBJECT"
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>The bonobo-context code is designed to provide a way to
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expose CORBA contexts through a single C interface. This
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is so that language bindings can get away with wrapping
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a single function, and yet have access to the whole
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Bonobo service framework. Two examples of this are the
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MonikerContext and the RunningContext ( see
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Bonobo_Context.idl ).</P
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>Example 1. Getting and using the moniker context</B
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CLASS="PROGRAMLISTING"
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>Bonobo_MonikerContext context;
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Bonobo_Unknown object;
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context = bonobo_context_get ("Activation", NULL);
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if (context == CORBA_OBJECT_NIL)
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g_error (_("Internal error, no activation context"));
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object = Bonobo_MonikerContext_getObject (
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"file:/demo/a.jpeg", "Bonobo/Control", ev);
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>The list of contexts is open and may be expanded in the future,
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currently there are the following:
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> Activation - Bonobo/MonikerContext
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> Running - Bonobo/RunningContext
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>The running context is particularly useful for ensuring that
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server processes exit cleanly when all their objects and
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derived objects are dead. To do this we can simply do the
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>Example 2. How to get a factory to quit when it is idle</B
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CLASS="PROGRAMLISTING"
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last_unref_exit_cb (gpointer context,
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BonoboObject *factory)
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bonobo_object_unref (factory);
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HREF=../gtk/gtk-general.html#GTK-MAIN-QUIT
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>gtk_main_quit</A>();
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int main (int argc, char **argv)
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bonobo_running_context_ignore_object (BONOBO_OBJREF (object));
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gtk_signal_connect (GTK_OBJECT (<A
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HREF="libbonobo-bonobo-context.html#BONOBO-CONTEXT-RUNNING-GET"
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>bonobo_context_running_get</A
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"last_unref", last_unref_exit_cb, factory);
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HREF="libbonobo-bonobo-main.html#BONOBO-MAIN"
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> Since this is a commonly used thing there is a helper to make this
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>Example 3. How to get a factory to quit when it is idle</B
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CLASS="PROGRAMLISTING"
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>bonobo_running_context_auto_exit_unref (factory)
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NAME="BONOBO-CONTEXT-GET"
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>bonobo_context_get ()</H3
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CLASS="PROGRAMLISTING"
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>Bonobo_Unknown bonobo_context_get (const CORBA_char *context_name,
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CORBA_Environment *opt_ev);</PRE
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>The most useful context is named 'Activation' and returns
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the IDL:Bonobo/ActivationContext:1.0 interface.</P
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CLASS="INFORMALTABLE"
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> the name of the context</TD
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> optional Environment, or NULL</TD
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> a new reference to a global Bonobo context or CORBA_OBJECT_NIL</TD
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NAME="BONOBO-CONTEXT-ADD"
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>bonobo_context_add ()</H3
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CLASS="PROGRAMLISTING"
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>void bonobo_context_add (const CORBA_char *context_name,
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Bonobo_Unknown context);</PRE
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>This function adds a new context to the context system</P
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CLASS="INFORMALTABLE"
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> the name to refer to the context by</TD
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> The Bonobo_Unknown; a ref. is taken on this.</TD
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NAME="BONOBO-CONTEXT-RUNNING-GET"
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>bonobo_context_running_get ()</H3
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CLASS="PROGRAMLISTING"
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HREF="libbonobo-bonobo-object.html#BONOBOOBJECT"
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>* bonobo_context_running_get (void);</PRE
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CLASS="INFORMALTABLE"
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NAME="BONOBO-RUNNING-CONTEXT-AUTO-EXIT-UNREF"
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>bonobo_running_context_auto_exit_unref ()</H3
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CLASS="PROGRAMLISTING"
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>void bonobo_running_context_auto_exit_unref
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HREF="libbonobo-bonobo-object.html#BONOBOOBJECT"
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CLASS="INFORMALTABLE"
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CLEAR="all"><BR><TABLE
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HREF="libbonobo-bonobo-config-database.html"
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><<< Previous Page</B
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>bonobo-config-database</B
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