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<a name="sec-refptr-checking-for-null"></a>Checking for null</h2></div></div></div>
<p>
Just like normal pointers, you can check whether a
<code class="classname">RefPtr</code> points to anything.
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<p>
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<pre class="programlisting">
Glib::RefPtr<Gtk::TreeModel> refModel = m_TreeView.get_model();
if(refModel)
{
int cols_count = refModel->get_n_columns();
...
}
</pre>
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<p>
But unlike normal pointers, <code class="classname">RefPtr</code>s are automatically
initialized to null so you don't need to remember to do that yourself.
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distrib
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Mandriva
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contrib-release
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