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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=US-ASCII"><title>Advanced usage</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2"><link rel="start" href="index.html" title="GTK+ Reference Manual"><link rel="up" href="gtk-migrating-GtkRecentChooser.html" title="Migrating from EggRecent to GtkRecentChooser"><link rel="prev" href="gtkrecent-chooser.html" title="Displaying the Recently Used Documents"><link rel="next" href="gtk-migrating-GtkLinkButton.html" title="Migrating from GnomeHRef to GtkLinkButton"><meta name="generator" content="GTK-Doc V1.9 (XML mode)"><link rel="stylesheet" href="style.css" type="text/css"><link rel="part" href="gtk.html" title="Part I. GTK+ Overview"><link rel="part" href="gtkbase.html" title="Part II. GTK+ Core Reference"><link rel="part" href="gtkobjects.html" title="Part III. GTK+ Widgets and Objects"><link rel="chapter" href="ch01.html" title="Object 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GtkTooltips to GtkTooltip"><link rel="part" href="pt05.html" title="Part V. GTK+ Tools"><link rel="glossary" href="glossary.html" title="Glossary"><link rel="index" href="ix01.html" title="Index"><link rel="index" href="ix02.html" title="Index of deprecated symbols"><link rel="index" href="ix03.html" title="Index of new symbols in 2.2"><link rel="index" href="ix04.html" title="Index of new symbols in 2.4"><link rel="index" href="ix05.html" title="Index of new symbols in 2.6"><link rel="index" href="ix06.html" title="Index of new symbols in 2.8"><link rel="index" href="ix07.html" title="Index of new symbols in 2.10"><link rel="index" href="ix08.html" title="Index of new symbols in 2.12"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="gtkrecent-chooser.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td><td><a accesskey="u" href="gtk-migrating-GtkRecentChooser.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td><td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td><th width="100%" align="center">GTK+ Reference Manual</th><td><a accesskey="n" href="gtk-migrating-GtkLinkButton.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr></table><div class="section" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="gtkrecent-advanced"></a>Advanced usage</h2></div></div></div><p> The <a class="link" href="GtkRecentChooser.html" title="GtkRecentChooser"><span class="type">GtkRecentChooser</span></a> widgets might display items sorted and filtered, either with already supplied or custom sorting and filtering functions. The biggest difference from the <span class="structname">EggRecentView</span> widgets in EggRecent is that the <a class="link" href="GtkRecentChooser.html" title="GtkRecentChooser"><span class="type">GtkRecentChooser</span></a> widgets will use their own copy of the list and will apply the sorting and filtering functions only on the copy; this allows the creation of many viewers with a single controller, like using many <a class="link" href="GtkTreeView.html" title="GtkTreeView"><span class="type">GtkTreeView</span></a> with a single <a class="link" href="GtkTreeModel.html" title="GtkTreeModel"><span class="type">GtkTreeModel</span></a> instance. </p><p> Available sorting methods are: </p><div class="informalexample"><pre class="programlisting"> /* no sorting */ gtk_recent_chooser_set_sort_type (GTK_RECENT_CHOOSER (chooser), GTK_RECENT_SORT_NONE); /* most recently used first */ gtk_recent_chooser_set_sort_type (GTK_RECENT_CHOOSER (chooser), GTK_RECENT_SORT_MRU); /* most recently used last */ gtk_recent_chooser_set_sort_type (GTK_RECENT_CHOOSER (chooser), GTK_RECENT_SORT_LRU); </pre></div><p> You can create your own sorting function, and the use the GTK_RECENT_SORT_CUSTOM method: </p><div class="informalexample"><pre class="programlisting"> /* custom sorting function, based on the registration count * (most used first) */ static void sort_by_usage_count (GtkRecentInfo *a, GtkRecentInfo *b, gpointer data) { gint count_a, count_b; count_a = count_b = 0; if (gtk_recent_info_has_application (a, APP_NAME)) gtk_recent_info_get_application_info (a, APP_NAME, NULL, &count_a, NULL); if (gtk_recent_info_has_application (b, APP_NAME)) gtk_recent_info_get_application_info (b, APP_NAME, NULL, &count_b, NULL); return count_a < count_b; } ... /* set custom sorting and set the custom sorting function */ gtk_recent_chooser_set_sort_type (GTK_RECENT_CHOOSER (chooser), GTK_RECENT_SORT_CUSTOM); gtk_recent_chooser_set_sort_func (GTK_RECENT_CHOOSER, sort_by_usage_count, NULL, /* sort function data */ NULL /* destroy notify for the data */); </pre></div><p> </p><p> Filtering is done using the <a class="link" href="GtkRecentFilter.html" title="GtkRecentFilter"><span class="type">GtkRecentFilter</span></a> object, similar to the <a class="link" href="gtk-gtkfilefilter.html#GtkFileFilter"><span class="type">GtkFileFilter</span></a> object used by the <a class="link" href="GtkFileChooser.html" title="GtkFileChooser"><span class="type">GtkFileChooser</span></a> widgets. The <a class="link" href="GtkRecentFilter.html" title="GtkRecentFilter"><span class="type">GtkRecentFilter</span></a> object has a set of pre-defined options based on the meta-data exposed by the <a class="link" href="GtkRecentManager.html#GtkRecentInfo"><span class="type">GtkRecentInfo</span></a> object. It also allows custom filtering function: </p><div class="informalexample"><pre class="programlisting"> GtkRecentFilter *filter; filter = gtk_recent_filter_new (); /* set the user visible name of the filter */ gtk_recent_filter_set_name (filter, "Since Last Month"); /* set the maximum age of a recently used document */ gtk_recent_filter_set_age (filter, 31); /* the chooser takes the ownership of the object */ gtk_recent_chooser_add_filter (GTK_RECENT_CHOOSER (chooser), filter); /* set the currently used filter */ gtk_recent_chooser_set_filter (GTK_RECENT_CHOOSER (chooser), filter); filter = gtk_recent_filter_new (); gtk_recent_filter_set_name (filter, "Every text file"); gtk_recent_filter_set_mime_type (filter, "text/plain"); gtk_recent_chooser_add_filter (GTK_RECENT_CHOOSER (chooser), filter); </pre></div><p> The <a class="link" href="GtkRecentChooserWidget.html" title="GtkRecentChooserWidget"><span class="type">GtkRecentChooserWidget</span></a> and <a class="link" href="GtkRecentChooserDialog.html" title="GtkRecentChooserDialog"><span class="type">GtkRecentChooserDialog</span></a> widgets allow multiple filters and the selection of an appropriate one; the <a class="link" href="GtkRecentChooserMenu.html" title="GtkRecentChooserMenu"><span class="type">GtkRecentChooserMenu</span></a> widget allows just a single filter object. </p></div></body></html>⌨️ 快捷键说明
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