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7<title>SetHomeButtonCallback</title>
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10<h1><CODE><a href="../../../nn/Overview.html">nn</a>::<a href="../../../nn/applet/Overview.html">applet</a>::<a href="../../../nn/applet/CTR/Overview.html">CTR</a>::SetHomeButtonCallback</CODE> Function</h1>
11<h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">
14void SetHomeButtonCallback(
15     <a href="../../../nn/applet/CTR/AppletHomeButtonCallback.html">AppletHomeButtonCallback</a> callback,
16     uptr arg = 0
17);
18</pre>
19    </div>
20<h2>Arguments</h2>
21    <div class="section">
22      <table class="arguments">
23        <thead>
24          <tr>
25            <td width="15" />
26<th>Name</th>
27<td>Description</td>
28          </tr>
29        </thead>
30        <tr>
31<td>in</td>
32<th>callback</th>
33<td>Callback.</td>
34        </tr>
35        <tr>
36<td>in</td>
37<th>arg</th>
38<td>Callback arguments.</td>
39        </tr> </table>
40    </div>
41<h2>Return Values</h2>
42    <div class="section">
43None.
44               </div>
45<h2>Description</h2>
46    <div class="section">
47<p>Sets the callback invoked when HOME is pressed.</p><!-- write here --><P>
48The callback is called when a HOME Button press is detected.
49</P><P>
50A number of applet functions will not end until the process has left the callback, so promptly end the callback to reduce the risk of deadlock.
51</P><PRE>
52 Example
53  bool myHomeButtonCallback( uptr arg, bool isActive, applet::HomeButtonState state )
54  {
55      NN_UNUSED_VAR(arg);
56      if ( isActive )
57      {
58          if ( state == applet::HOME_BUTTON_SINGLE_PRESSED )
59          {
60             NN_LOG(&quot;HOME BUTTON is clicked.\n&quot;);
61          }
62          else
63          {
64             NN_LOG(&quot;HOME BUTTON is double-clicked.\n&quot;);
65          }
66          return true;
67      }
68      else
69      {
70          return false;
71      }
72  }
73  nnMain()
74  {
75      applet::SetHomeButtonCallback( myHomeButtonCallback, 0 );
76         …
77  }
78</PRE></div>
79<h2>Revision History</h2>
80    <div class="section">
81      <dl class="history">
82        <dt>2011/02/17</dt>
83<dd>	        Added a note about the callback.<br />
84        </dd>
85        <dt>2010/11/10</dt>
86<dd>Initial version.<br />
87        </dd>
88      </dl>
89    </div>
90  <hr><p>CONFIDENTIAL</p></body>
91</html>
92