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<title>GtkSpell Reference Manual: Advanced usage</title>
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<div class="sect1">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="tutorial-advanced"></a>Advanced usage</h2></div></div></div>
<p>
For convenience, <code class="function">gtk_spell_checker_new()</code> is created as
<code class="classname">GInitiallyUnowned</code> and
<code class="function">gtk_spell_checker_attach()</code> will sink the floating
reference. <code class="function">gtk_spell_checker_attach()</code> also connects the
<code class="literal">destroy</code> signal of the passed-in
<code class="classname">GObject</code> to <code class="function">g_object_unref()</code> the
<code class="classname">GtkSpellChecker</code>, so in the most common use-case, you
need not worry about cleaning it up.
However, if you want to detach and later reattach the
<code class="classname">GtkSpellChecker</code> to a (possibly different)
<code class="classname">GtkTextView</code>, you must get a pointer to it with
<code class="function">gtk_spell_checker_get_from_text_view()</code>, call
<code class="function">g_object_ref()</code> on the resulting pointer, call
<code class="function">gtk_spell_checker_detach()</code> on it, call
<code class="function">gtk_spell_checker_attach()</code> with the new
<code class="classname">GtkTextView</code>, and finally call
<code class="function">g_object_unref()</code> to release the reference that you took at
the beginning, like this:
</p>
<pre class="programlisting">
GtkTextView* view = gtk_text_view_new ();
GtkSpellChecker* spell = gtk_spell_checker_new ();
gtk_spell_checker_set_language (spell, "en_US", NULL);
gtk_spell_checker_attach (GTK_TEXT_VIEW (view));
/* ... */
// Detach
g_object_ref (spell);
gtk_spell_checker_detach (spell);
/* ... */
// Reattach
gtk_spell_checker_attach (spell, GTK_TEXT_VIEW (view));
g_object_unref (spell);
</pre>
<p>
Alternatively, you can sink the <code class="classname">GtkSpellChecker</code>
immediately upon construction with <code class="function">g_object_ref_sink()</code>,
in which case you will retain the ownership of the
<code class="classname">GtkSpellChecker</code> throughout the lifetime of the program,
and you must remember to call <code class="function">g_object_unref()</code> when you
don't need it any more, like this:
</p>
<pre class="programlisting">
GtkTextView* view = gtk_text_view_new ();
GtkSpellChecker* spell = gtk_spell_checker_new ();
g_object_ref_sink (spell);
gtk_spell_checker_set_language (spell, "en_US", NULL);
gtk_spell_checker_attach (GTK_TEXT_VIEW (view));
/* ... */
// Detach
gtk_spell_checker_detach (spell);
/* ... */
// Reattach
gtk_spell_checker_attach (spell, GTK_TEXT_VIEW (view));
/* ... */
// End of life time
g_object_unref (spell);
</pre>
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