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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="setting-the-page-flow"></a>Setting the page flow</h2></div></div></div>
<p>
Here is the area where <span class="structname">GtkAssistant</span> and <span class="structname">GnomeDruid</span>
differ the most. While <span class="structname">GnomeDruid</span> used the "next" and "back" signals from the
<span class="structname">GnomeDruidPage</span>, <span class="structname">GtkAssistant</span> uses the following
techniques:
</p>
<div class="itemizedlist"><ul type="disc">
<li><p><a href="GtkAssistant.html#gtk-assistant-set-forward-page-func"><code class="function">gtk_assistant_set_forward_page_func()</code></a>: Allows to define a GtkAssistantPageFunc to let the
assistant know which will be the following page given the current page.</p></li>
<li><p><a href="GtkAssistant.html#gtk-assistant-set-page-complete"><code class="function">gtk_assistant_set_page_complete()</code></a>: Lets the assistant know whether the specified page is complete
or not, updating buttons state accordingly.</p></li>
<li>
<p><a href="GtkAssistant.html#gtk-assistant-set-page-type"><code class="function">gtk_assistant_set_page_type()</code></a>: Lets the assistant know the page role and update the buttons
state accordingly. Pages can have the following roles:</p>
<table class="simplelist" border="0" summary="Simple list">
<tr><td>Intro</td></tr>
<tr><td>Content</td></tr>
<tr><td>Progress</td></tr>
<tr><td>Confirmation</td></tr>
<tr><td>Summary</td></tr>
</table>
</li>
</ul></div>
<p>
A sample GtkAssistantPageFunc could look like this:
</p>
<pre class="programlisting">
static gint
forward_page_function (gint current_page,
gpointer data)
{
switch (current_page)
{
case 0:
return 1;
case 1:
if (<code class="function">check_page1_data()</code>)
return 2;
else
return 3;
case 2:
return 3;
default:
return -1;
}
}
</pre>
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