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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Migrating from SexyIconEntry to GtkEntry: GTK+ 2 Reference Manual</title>
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<div class="chapter">
<div class="titlepage"><div><div><h2 class="title">
<a name="gtk-migrating-entry-icons"></a>Migrating from SexyIconEntry to GtkEntry</h2></div></div></div>
<p>
GTK+ 2.16 supports showing icons inside a <a class="link" href="GtkEntry.html" title="GtkEntry"><span class="type">GtkEntry</span></a>, similar to
SexyIconEntry. Porting from SexyIconEntry to GtkEntry is relatively
straightforward. The main difference between the two APIs is that
SexyIconEntry uses <a class="link" href="GtkImage.html" title="GtkImage"><span class="type">GtkImage</span></a> widgets in a somewhat awkward way as
storage vehicles for icons, while GtkEntry allows to specify icons
via pixbufs, stock ids, icon names or <span class="type">GIcons</span>. So, if your code uses
e.g.:
</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</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="n">image</span> <span class="o">=</span> <span class="n">gtk_image_new_from_stock</span> <span class="p">(</span><span class="n">GTK_STOCK_NEW</span><span class="p">,</span> <span class="n">GTK_ICON_SIZE_MENU</span><span class="p">);</span>
<span class="n">sexy_icon_entry_set_icon</span> <span class="p">(</span><span class="n">entry</span><span class="p">,</span> <span class="n">SEXY_ICON_ENTRY_PRIMARY</span><span class="p">,</span> <span class="n">image</span><span class="p">);</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
you can get rid of the <em class="parameter"><code>image</code></em>, and directly write:
</p>
<div class="informalexample">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>1</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="n">gtk_entry_set_icon_from_stock</span> <span class="p">(</span><span class="n">entry</span><span class="p">,</span> <span class="n">GTK_ENTRY_ICON_PRIMARY</span><span class="p">,</span> <span class="n">GTK_STOCK_NEW</span><span class="p">);</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
</p>
<p>
The signals SexyIconEntry::icon-pressed and SexyIconEntry::icon-released
have been renamed to <a class="link" href="GtkEntry.html#GtkEntry-icon-press" title="The “icon-press” signal"><span class="type">“icon-press”</span></a> and <a class="link" href="GtkEntry.html#GtkEntry-icon-release" title="The “icon-release” signal"><span class="type">“icon-release”</span></a>
to avoid problems due to signal name clashes. Also, the signature of the
signals has changed from
</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</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="kt">void</span> <span class="p">(</span><span class="o">*</span><span class="n">icon_pressed</span><span class="p">)</span> <span class="p">(</span><span class="n">SexyIconEntry</span> <span class="o">*</span><span class="n">entry</span><span class="p">,</span>
<span class="n">SexyIconEntryPosition</span> <span class="n">icon_pos</span><span class="p">,</span>
<span class="kt">int</span> <span class="n">button</span><span class="p">)</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
to
</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</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="kt">void</span> <span class="p">(</span><span class="o">*</span><span class="n">icon_press</span><span class="p">)</span> <span class="p">(</span><span class="n">GtkEntry</span> <span class="o">*</span><span class="n">entry</span><span class="p">,</span>
<span class="n">GtkEntryIconPosition</span> <span class="n">icon_pos</span><span class="p">,</span>
<span class="n">GdkEventButton</span> <span class="o">*</span><span class="n">event</span><span class="p">)</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
The new signature has the advantage that the signal handler can use
the timestamp of the event, e.g. for passing it to <a class="link" href="GtkMenu.html#gtk-menu-popup" title="gtk_menu_popup ()"><code class="function">gtk_menu_popup()</code></a>.
When adapting an existing signal handler to the new signature, you
should note that the button number is easily available as <em class="parameter"><code>event->button</code></em>,
as shown in 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
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12</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="k">static</span> <span class="kt">void</span>
<span class="nf">icon_pressed_cb</span> <span class="p">(</span><span class="n">SexyIconEntry</span> <span class="o">*</span><span class="n">entry</span><span class="p">,</span>
<span class="n">SexyIconEntryPosition</span> <span class="n">position</span><span class="p">,</span>
<span class="kt">int</span> <span class="n">button</span><span class="p">,</span>
<span class="n">gpointer</span> <span class="n">data</span><span class="p">)</span>
<span class="p">{</span>
<span class="n">GtkMenu</span> <span class="o">*</span><span class="n">menu</span> <span class="o">=</span> <span class="n">data</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="n">position</span> <span class="o">==</span> <span class="n">SEXY_ICON_ENTRY_PRIMARY</span><span class="p">)</span>
<span class="n">gtk_menu_popup</span> <span class="p">(</span><span class="n">GTK_MENU</span> <span class="p">(</span><span class="n">menu</span><span class="p">),</span> <span class="nb">NULL</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span>
<span class="n">button</span><span class="p">,</span> <span class="n">GDK_CURRENT_TIME</span><span class="p">);</span>
<span class="p">}</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
can be ported as:
</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
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7
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11
12</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="k">static</span> <span class="kt">void</span>
<span class="nf">icon_press_cb</span> <span class="p">(</span><span class="n">GtkEntry</span> <span class="o">*</span><span class="n">entry</span><span class="p">,</span>
<span class="n">GtkEntryIconPosition</span> <span class="n">position</span><span class="p">,</span>
<span class="n">GdkEventButton</span> <span class="o">*</span><span class="n">event</span><span class="p">,</span>
<span class="n">gpointer</span> <span class="n">data</span><span class="p">)</span>
<span class="p">{</span>
<span class="n">GtkMenu</span> <span class="o">*</span><span class="n">menu</span> <span class="o">=</span> <span class="n">data</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="n">position</span> <span class="o">==</span> <span class="n">GTK_ENTRY_ICON_PRIMARY</span><span class="p">)</span>
<span class="n">gtk_menu_popup</span> <span class="p">(</span><span class="n">GTK_MENU</span> <span class="p">(</span><span class="n">menu</span><span class="p">),</span> <span class="nb">NULL</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span>
<span class="n">event</span><span class="o">-></span><span class="n">button</span><span class="p">,</span> <span class="n">event</span><span class="o">-></span><span class="n">time</span><span class="p">);</span>
<span class="p">}</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
</p>
<p>
Another difference is that SexyIconEntry offers manual control of
the icon prelighting, via <code class="function">sexy_icon_entry_set_icon_highlight()</code>.
<a class="link" href="GtkEntry.html" title="GtkEntry"><span class="type">GtkEntry</span></a> prelights automatically when appropriate, depending on
whether the icon is activatable and sensitive. You should make
sure that your icons are properly marked as activatable or nonactivatable
and sensitive or insensitive:
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><p>
Sensitive, but non-activatable icons are
good for purely informational purposes.
</p></li>
<li class="listitem"><p>
Icons should be marked as insensitive if the
function that they trigger is currently not available.
</p></li>
</ul></div>
<p>
</p>
<p>
GtkEntry has no direct equivalent of the special-purpose function
<code class="function">sexy_icon_entry_add_clear_button()</code>. If you need this functionality,
the following code works:
</p>
<div class="informalexample">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>1
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36</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="k">static</span> <span class="kt">void</span>
<span class="nf">icon_pressed_cb</span> <span class="p">(</span><span class="n">GtkEntry</span> <span class="o">*</span><span class="n">entry</span><span class="p">,</span>
<span class="n">gint</span> <span class="n">position</span><span class="p">,</span>
<span class="n">GdkEventButton</span> <span class="o">*</span><span class="n">event</span><span class="p">,</span>
<span class="n">gpointer</span> <span class="n">data</span><span class="p">)</span>
<span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="n">position</span> <span class="o">==</span> <span class="n">GTK_ENTRY_ICON_SECONDARY</span><span class="p">)</span>
<span class="n">gtk_entry_set_text</span> <span class="p">(</span><span class="n">entry</span><span class="p">,</span> <span class="s">""</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">static</span> <span class="kt">void</span>
<span class="nf">text_changed_cb</span> <span class="p">(</span><span class="n">GtkEntry</span> <span class="o">*</span><span class="n">entry</span><span class="p">,</span>
<span class="n">GParamSpec</span> <span class="o">*</span><span class="n">pspec</span><span class="p">,</span>
<span class="n">GtkWidget</span> <span class="o">*</span><span class="n">button</span><span class="p">)</span>
<span class="p">{</span>
<span class="n">gboolean</span> <span class="n">has_text</span><span class="p">;</span>
<span class="n">has_text</span> <span class="o">=</span> <span class="n">gtk_entry_get_text_length</span> <span class="p">(</span><span class="n">entry</span><span class="p">)</span> <span class="o">></span> <span class="mi">0</span><span class="p">;</span>
<span class="n">gtk_entry_set_icon_sensitive</span> <span class="p">(</span><span class="n">entry</span><span class="p">,</span>
<span class="n">GTK_ENTRY_ICON_SECONDARY</span><span class="p">,</span>
<span class="n">has_text</span><span class="p">);</span>
<span class="p">}</span>
<span class="cm">/* ... */</span>
<span class="cm">/* Set up the clear icon */</span>
<span class="n">gtk_entry_set_icon_from_stock</span> <span class="p">(</span><span class="n">GTK_ENTRY</span> <span class="p">(</span><span class="n">entry</span><span class="p">),</span>
<span class="n">GTK_ENTRY_ICON_SECONDARY</span><span class="p">,</span>
<span class="n">GTK_STOCK_CLEAR</span><span class="p">);</span>
<span class="n">g_signal_connect</span> <span class="p">(</span><span class="n">entry</span><span class="p">,</span> <span class="s">"icon-press"</span><span class="p">,</span>
<span class="n">G_CALLBACK</span> <span class="p">(</span><span class="n">icon_pressed_cb</span><span class="p">),</span> <span class="nb">NULL</span><span class="p">);</span>
<span class="n">g_signal_connect</span> <span class="p">(</span><span class="n">entry</span><span class="p">,</span> <span class="s">"notify::text"</span><span class="p">,</span>
<span class="n">G_CALLBACK</span> <span class="p">(</span><span class="n">text_changed_cb</span><span class="p">),</span> <span class="n">find_button</span><span class="p">);</span>
<span class="cm">/* ... */</span></pre></td>
</tr>
</tbody>
</table>
</div>
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