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| <div class="titlepage"><div><div><h2 class="title" style="clear: both"> |
| <a name="id-1.5.5.5"></a>Creating proxies for well-known names</h2></div></div></div> |
| <p> |
| dbus-glib lets you create proxy objects for well-known names, like the |
| following example: |
| </p> |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1 |
| 2 |
| 3 |
| 4</pre></td> |
| <td class="listing_code"><pre class="programlisting"><span class="normal">proxy </span><span class="symbol">=</span><span class="normal"> </span><span class="function">dbus_g_proxy_new_for_name</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">system_bus_connection</span><span class="symbol">,</span> |
| <span class="normal"> </span><span class="string">"org.freedesktop.Accounts"</span><span class="symbol">,</span> |
| <span class="normal"> </span><span class="string">"/org/freedesktop/Accounts"</span><span class="symbol">,</span> |
| <span class="normal"> </span><span class="string">"org.freedesktop.Accounts"</span><span class="symbol">);</span></pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| |
| <p> |
| For a <span class="type">DBusGProxy</span> constructed like this, method calls will be sent to |
| the current owner of the name, and that owner can change over time. |
| </p> |
| <p> |
| The same can be achieved with <a class="link" href="GDBusProxy.html" title="GDBusProxy"><span class="type">GDBusProxy</span></a>: |
| </p> |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
| 9</pre></td> |
| <td class="listing_code"><pre class="programlisting"><span class="normal">error </span><span class="symbol">=</span><span class="normal"> <a href="../glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">;</span> |
| <span class="normal">proxy </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GDBusProxy.html#g-dbus-proxy-new-for-bus-sync">g_dbus_proxy_new_for_bus_sync</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal"><a href="GDBusConnection.html#G-BUS-TYPE-SYSTEM:CAPS">G_BUS_TYPE_SYSTEM</a></span><span class="symbol">,</span> |
| <span class="normal"> <a href="GDBusProxy.html#G-DBUS-PROXY-FLAGS-NONE:CAPS">G_DBUS_PROXY_FLAGS_NONE</a></span><span class="symbol">,</span> |
| <span class="normal"> <a href="../glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">,</span><span class="normal"> </span><span class="comment">/* GDBusInterfaceInfo */</span> |
| <span class="normal"> </span><span class="string">"org.freedesktop.Accounts"</span><span class="symbol">,</span> |
| <span class="normal"> </span><span class="string">"/org/freedesktop/Accounts"</span><span class="symbol">,</span> |
| <span class="normal"> </span><span class="string">"org.freedesktop.Accounts"</span><span class="symbol">,</span> |
| <span class="normal"> <a href="../glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">,</span><span class="normal"> </span><span class="comment">/* GCancellable */</span> |
| <span class="normal"> </span><span class="symbol">&</span><span class="normal">error</span><span class="symbol">);</span></pre></td> |
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| </table> |
| </div> |
| |
| <p> |
| For an added layer of safety, you can specify what D-Bus |
| interface the proxy is expected to conform to by using the |
| <a class="link" href="gio-D-Bus-Introspection-Data.html#GDBusInterfaceInfo"><span class="type">GDBusInterfaceInfo</span></a> type. Additionally, <a class="link" href="GDBusProxy.html" title="GDBusProxy"><span class="type">GDBusProxy</span></a> loads, |
| caches and tracks changes to the D-Bus properties on the remote |
| object. It also sets up match rules so D-Bus signals from the |
| remote object are delivered locally. |
| </p> |
| <p> |
| The <a class="link" href="GDBusProxy.html" title="GDBusProxy"><span class="type">GDBusProxy</span></a> type normally isn't used directly - instead |
| proxies subclassing <a class="link" href="GDBusProxy.html" title="GDBusProxy"><span class="type">GDBusProxy</span></a> generated by <span class="command"><strong>gdbus-codegen</strong></span> is used, see <a class="xref" href="gdbus-example-gdbus-codegen.html" title="Using gdbus-codegen">the section called “Using gdbus-codegen”</a> |
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