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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>settings</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
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<th width="100%" align="center">Gwyddion Application Library Reference Manual</th>
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<tr><td colspan="5" class="shortcuts">
<a href="#libgwyapp-settings.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#libgwyapp-settings.description" class="shortcut">Description</a>
</td></tr>
</table>
<div class="refentry">
<a name="libgwyapp-settings"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="libgwyapp-settings.top_of_page"></a>settings</span></h2>
<p>settings — Application and module settings</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="libgwyapp-settings.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;app/gwyapp.h&gt;

#define             <a class="link" href="libgwyapp-settings.html#GWY-APP-SETTINGS-ERROR:CAPS" title="GWY_APP_SETTINGS_ERROR">GWY_APP_SETTINGS_ERROR</a>
enum                <a class="link" href="libgwyapp-settings.html#GwyAppSettingsError" title="enum GwyAppSettingsError">GwyAppSettingsError</a>;
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="libgwyapp-settings.html#gwy-app-gl-init" title="gwy_app_gl_init ()">gwy_app_gl_init</a>                     (<em class="parameter"><code><span class="type">int</span> *argc</code></em>,
                                                         <em class="parameter"><code><span class="type">char</span> ***argv</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="libgwyapp-settings.html#gwy-app-gl-is-ok" title="gwy_app_gl_is_ok ()">gwy_app_gl_is_ok</a>                    (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="libgwyapp-settings.html#gwy-app-settings-create-config-dir" title="gwy_app_settings_create_config_dir ()">gwy_app_settings_create_config_dir</a>  (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>              <a class="link" href="libgwyapp-settings.html#gwy-app-settings-error-quark" title="gwy_app_settings_error_quark ()">gwy_app_settings_error_quark</a>        (<em class="parameter"><code><span class="type">void</span></code></em>);
<span class="returnvalue">void</span>                <a class="link" href="libgwyapp-settings.html#gwy-app-settings-free" title="gwy_app_settings_free ()">gwy_app_settings_free</a>               (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="returnvalue">GwyContainer</span></a> *      <a class="link" href="libgwyapp-settings.html#gwy-app-settings-get" title="gwy_app_settings_get ()">gwy_app_settings_get</a>                (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *             <a class="link" href="libgwyapp-settings.html#gwy-app-settings-get-log-filename" title="gwy_app_settings_get_log_filename ()">gwy_app_settings_get_log_filename</a>   (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> **            <a class="link" href="libgwyapp-settings.html#gwy-app-settings-get-module-dirs" title="gwy_app_settings_get_module_dirs ()">gwy_app_settings_get_module_dirs</a>    (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *             <a class="link" href="libgwyapp-settings.html#gwy-app-settings-get-recent-file-list-filename" title="gwy_app_settings_get_recent_file_list_filename ()">gwy_app_settings_get_recent_file_list_filename</a>
                                                        (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *             <a class="link" href="libgwyapp-settings.html#gwy-app-settings-get-settings-filename" title="gwy_app_settings_get_settings_filename ()">gwy_app_settings_get_settings_filename</a>
                                                        (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="libgwyapp-settings.html#gwy-app-settings-load" title="gwy_app_settings_load ()">gwy_app_settings_load</a>               (<em class="parameter"><code>const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *filename</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="libgwyapp-settings.html#gwy-app-settings-save" title="gwy_app_settings_save ()">gwy_app_settings_save</a>               (<em class="parameter"><code>const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *filename</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="libgwyapp-settings.description"></a><h2>Description</h2>
<p>
All application and module settings are stored in a one big <a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a>
which can be obtained by <a class="link" href="libgwyapp-settings.html#gwy-app-settings-get" title="gwy_app_settings_get ()"><code class="function">gwy_app_settings_get()</code></a>. Then you can use
<a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a> functions to get and save settings.
</p>
<p>
The rest of the setting manipulating functions is normally useful only in
main application.
</p>
</div>
<div class="refsect1">
<a name="libgwyapp-settings.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GWY-APP-SETTINGS-ERROR:CAPS"></a><h3>GWY_APP_SETTINGS_ERROR</h3>
<pre class="programlisting">#define GWY_APP_SETTINGS_ERROR gwy_app_settings_error_quark()
</pre>
<p>
Error domain for application settings operations. Errors in this domain will
be from the <a class="link" href="libgwyapp-settings.html#GwyAppSettingsError" title="enum GwyAppSettingsError"><span class="type">GwyAppSettingsError</span></a> enumeration. See <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> for information
on error domains.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyAppSettingsError"></a><h3>enum GwyAppSettingsError</h3>
<pre class="programlisting">typedef enum {
    GWY_APP_SETTINGS_ERROR_FILE,
    GWY_APP_SETTINGS_ERROR_CORRUPT,
    GWY_APP_SETTINGS_ERROR_CFGDIR
} GwyAppSettingsError;
</pre>
<p>
Error codes returned by application settings functions.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GWY-APP-SETTINGS-ERROR-FILE:CAPS"></a><span class="term"><code class="literal">GWY_APP_SETTINGS_ERROR_FILE</code></span></p></td>
<td>Settings file is not readable or writable.
</td>
</tr>
<tr>
<td><p><a name="GWY-APP-SETTINGS-ERROR-CORRUPT:CAPS"></a><span class="term"><code class="literal">GWY_APP_SETTINGS_ERROR_CORRUPT</code></span></p></td>
<td>Settings file contents is corrupted.
</td>
</tr>
<tr>
<td><p><a name="GWY-APP-SETTINGS-ERROR-CFGDIR:CAPS"></a><span class="term"><code class="literal">GWY_APP_SETTINGS_ERROR_CFGDIR</code></span></p></td>
<td>User configuration directory is not
                                readable or writable or it does not exist
                                and its creation failed.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-gl-init"></a><h3>gwy_app_gl_init ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            gwy_app_gl_init                     (<em class="parameter"><code><span class="type">int</span> *argc</code></em>,
                                                         <em class="parameter"><code><span class="type">char</span> ***argv</code></em>);</pre>
<p>
Checks for working OpenGL and initializes it.
</p>
<p>
When OpenGL support is not compiled in, this function does not do anything.
When OpenGL is supported, it calls <a href="/usr/share/gtk-doc/html/gtkglext/gtkglext-gtkglinit.html#gtk-gl-init-check"><code class="function">gtk_gl_init_check()</code></a> and
<a href="./../libgwydgets/libgwydgets/libgwydgets-gwydgets.html#gwy-widgets-gl-init"><code class="function">gwy_widgets_gl_init()</code></a> (if the former succeeeds).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>argc</code></em> :</span></p></td>
<td>Address of the argc parameter of <code class="function">main()</code>. Passed to
<a href="/usr/share/gtk-doc/html/gtkglext/gtkglext-gtkglinit.html#gtk-gl-init-check"><code class="function">gtk_gl_init_check()</code></a>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>argv</code></em> :</span></p></td>
<td>Address of the argv parameter of <code class="function">main()</code>. Passed to
<a href="/usr/share/gtk-doc/html/gtkglext/gtkglext-gtkglinit.html#gtk-gl-init-check"><code class="function">gtk_gl_init_check()</code></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if OpenGL initialization succeeeded.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-gl-is-ok"></a><h3>gwy_app_gl_is_ok ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            gwy_app_gl_is_ok                    (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Returns OpenGL availability.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The return value is the same as the return value of
<a class="link" href="libgwyapp-settings.html#gwy-app-gl-init" title="gwy_app_gl_init ()"><code class="function">gwy_app_gl_init()</code></a> which needs to be called prior to this function
(until then, the return value is always <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>).</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-settings-create-config-dir"></a><h3>gwy_app_settings_create_config_dir ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            gwy_app_settings_create_config_dir  (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>
Create gwyddion config directory.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>Location to store loading error to, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Whether it succeeded (also returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the directory already
exists).</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-settings-error-quark"></a><h3>gwy_app_settings_error_quark ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>              gwy_app_settings_error_quark        (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Returns error domain for application settings operations.
</p>
<p>
See and use <a class="link" href="libgwyapp-settings.html#GWY-APP-SETTINGS-ERROR:CAPS" title="GWY_APP_SETTINGS_ERROR"><code class="literal">GWY_APP_SETTINGS_ERROR</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The error domain.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-settings-free"></a><h3>gwy_app_settings_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_app_settings_free               (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Frees Gwyddion settings.
</p>
<p>
Should not be called only by main application.
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-settings-get"></a><h3>gwy_app_settings_get ()</h3>
<pre class="programlisting"><a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="returnvalue">GwyContainer</span></a> *      gwy_app_settings_get                (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Gets the Gwyddion settings.
</p>
<p>
The settings are a <a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a> automatically loaded at program startup
and saved ad its exit.  For storing persistent module data you should
use <code class="literal">"/module/YOUR_MODULE_NAME/"</code> prefix.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The settings as a <a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a>.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-settings-get-log-filename"></a><h3>gwy_app_settings_get_log_filename ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *             gwy_app_settings_get_log_filename   (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Returns a suitable log file name.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The file name as a newly allocated string.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-settings-get-module-dirs"></a><h3>gwy_app_settings_get_module_dirs ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> **            gwy_app_settings_get_module_dirs    (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Returns a list of directories to search modules in.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The list of module directories as a newly allocated array of
newly allocated strings, to be freed with <code class="function">g_str_freev()</code> when
not longer needed.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-settings-get-recent-file-list-filename"></a><h3>gwy_app_settings_get_recent_file_list_filename ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *             gwy_app_settings_get_recent_file_list_filename
                                                        (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Returns a suitable recent file list file name.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The file name as a newly allocated string.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-settings-get-settings-filename"></a><h3>gwy_app_settings_get_settings_filename ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *             gwy_app_settings_get_settings_filename
                                                        (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Returns a suitable human-readable settings file name.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The file name as a newly allocated string.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-settings-load"></a><h3>gwy_app_settings_load ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            gwy_app_settings_load               (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *filename</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>
Loads settings file.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>filename</code></em> :</span></p></td>
<td>A filename to read settings from.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>Location to store loading error to, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Whether it succeeded.  In either case you can call
<a class="link" href="libgwyapp-settings.html#gwy-app-settings-get" title="gwy_app_settings_get ()"><code class="function">gwy_app_settings_get()</code></a> then to obtain either the loaded settings
or the old ones (if failed), or an empty <a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-app-settings-save"></a><h3>gwy_app_settings_save ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            gwy_app_settings_save               (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *filename</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>
Saves the settings.
</p>
<p>
Use <a class="link" href="libgwyapp-settings.html#gwy-app-settings-get-settings-filename" title="gwy_app_settings_get_settings_filename ()"><code class="function">gwy_app_settings_get_settings_filename()</code></a> to obtain a suitable default
filename.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>filename</code></em> :</span></p></td>
<td>A filename to save the settings to.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>Location to store loading error to, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Whether it succeeded.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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