<! -- setvalue2 (double newValue): sets value2 -->
<method name=" setvalue2">
<arg type="d" name =" new_value " direction =" in"/>
</ method>
<! -- Signal (D -Bus ) definitions -->
<! -- NOTE: The current version of dbus -bindings - tool doesn ’t
actually enforce the signal arguments _at_all_. Signals need
to be declared in order to be passed through the bus itself ,
but otherwise no checks are done ! For example , you could
leave the signal arguments unspecified completely , and the
code would still work . -->
<! -- Signals to tell interested clients about state change .
We send a string parameter with them . They never can have
arguments with direction = in . -->
<signal name=" changed_value1 " >
<arg type="s" name =" change_source_name " direction =" out"/>
</ signal >
<signal name=" changed_value2 " >
<arg type="s" name =" change_source_name " direction =" out"/>
</ signal >
<! -- Signals to tell interested clients that values are outside
the internally configured range ( thresholds ). -->
<signal name=" outofrange_value1 ">
<arg type="s" name =" outofrange_source_name " direction =" out"/>
</ signal >
<signal name=" outofrange_value2 ">
<arg type="s" name =" outofrange_source_name " direction =" out"/>
</ signal >
</ interface >
</ node >
Listing 1.2: glib-dbus-signals/value-dbus-interface.xml
1.3 glib-dbus-signals/server.c
/**
* This program implements a GObject for a simple class , then
* registers the object on the D - Bus and starts serving requests .
*
* This maemo code example is licensed under a MIT -style license ,
* that can be found in the file called "License " in the same
* directory as this file .
* Copyright (c) 2007 -2008 Nokia Corporation . All rights reserved.
*
* In more complicated code , the GObject definition , implementation
* and D- Bus registration would all live in separate files . In this
* server , they ’re all present in this file .
*
* This program will pull the automatically generated D -Bus / GLib stub
* code ( which contains the marshaling code as well as a binding / call
* table .
*
* This program also might serve as an introduction into implementing
4
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