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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>Migrating from GnomeIconList to GtkIconView</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="migrating.html" title="Part IV. Migrating from Previous Versions of GTK+"><link rel="prev" href="new-features-GtkComboBox.html" title="New features"><link rel="next" href="gtk-migrating-GtkAboutDialog.html" title="Migrating from GnomeAbout to GtkAboutDialog"><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="new-features-GtkComboBox.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td><td><a accesskey="u" href="migrating.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-GtkAboutDialog.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr></table><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="gtk-migrating-GtkIconView"></a>Migrating from GnomeIconList to GtkIconView</h2></div></div></div><p> Since version 2.6, GTK+ provides the <a class="link" href="GtkIconView.html" title="GtkIconView"><span class="type">GtkIconView</span></a> widget. It is similar in functionality to the <span class="structname">GnomeIconList</span> widget in the libgnomeui library, both widgets provide a way to lay out named icons in a grid. The distinctive feature of the GTK+ widget is that it follows the model-view pattern, allowing it to share the actual data (i.e. the names and images of the icons) with other views. </p><p> <a class="link" href="GtkIconView.html" title="GtkIconView"><span class="type">GtkIconView</span></a> currently doesn't support some features found in <span class="structname">GnomeIconList</span>. Icons can not be positioned freely, the spacing is not customizable, and it is not possible to edit the names of icons. </p><p> To convert an application that uses <span class="structname">GnomeIconList</span> to <a class="link" href="GtkIconView.html" title="GtkIconView"><span class="type">GtkIconView</span></a>, the first step is to organize your data in a <a class="link" href="GtkTreeModel.html" title="GtkTreeModel"><span class="type">GtkTreeModel</span></a>. <span class="structname">GnomeIconList</span> lets you directly insert data with <ahref="/usr/share/gtk-doc/html/libgnomeui/GnomeIconList.html#gnome-icon-list-insert"><code class="function">gnome_icon_list_insert()</code></a> and <ahref="/usr/share/gtk-doc/html/libgnomeui/GnomeIconList.html#gnome-icon-list-insert-pixbuf"><code class="function">gnome_icon_list_insert_pixbuf()</code></a> and their append variants. So, if you previously had a function to fill your icon list similar to this one: </p><div class="informalexample"><pre class="programlisting"> void fill_icon_list (GnomeIconList *icon_list) { gnome_icon_list_append (icon_list, "file1.png", "Icon 1"); gnome_icon_list_append (icon_list, "file2.png", "Icon 2"); /* more icons ... */ } </pre></div><p> you will have to create a tree model, attach your icon view to it, and fill the model: </p><div class="informalexample"><pre class="programlisting"> enum { PIXBUF_COLUMN, TEXT_COLUMN, /* you can have more columns here, e.g */ DATA_COLUMN }; void fill_model (GtkListStore *store) { GtkTreeIter iter; GdkPixbuf *pixbuf; gtk_list_store_append (store, &iter); pixbuf = gdk_pixbuf_new_from_file ("file1.png", NULL); gtk_list_store_set (store, &iter, PIXBUF_COLUMN, pixbuf, TEXT_COLUMN, "Icon 1", -1); g_object_unref (pixbuf); gtk_list_store_append (store, &iter); pixbuf = gdk_pixbuf_new_from_file ("file2.png", NULL); gtk_list_store_set (store, &iter, PIXBUF_COLUMN, pixbuf, TEXT_COLUMN, "Icon 2", -1); g_object_unref (pixbuf); /* more icons ... */ } int main (int argc, char *argv[]) { GtkWidget *icon_view; GtkListStore *store; gtk_init (&argc, &argv); /* do other initialization... */ /* construct the GtkIconView */ icon_view = gtk_icon_view_new (); store = gtk_list_store_new (3, GDK_TYPE_PIXBUF, G_TYPE_STRING, G_TYPE_POINTER); gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (icon_view), PIXBUF_COLUMN); gtk_icon_view_set_text_column (GTK_ICON_VIEW (icon_view), TEXT_COLUMN); gtk_icon_view_set_model (GTK_ICON_VIEW (icon_view), GTK_TREE_MODEL (store)); fill_model (store); /* ... */ } </pre></div><p> This example uses a <a class="link" href="GtkListStore.html" title="GtkListStore"><span class="type">GtkListStore</span></a> as model, but part of the elegance of the model-view pattern is that you can easily use another tree model implementation, or even write your own custom tree model. </p><p> Your application may make use of extra data attached to the icons in the <span class="structname">GnomeIconList</span> via <ahref="/usr/share/gtk-doc/html/libgnomeui/GnomeIconList.html#gnome-icon-list-set-icon-data"><code class="function">gnome_icon_list_set_icon_data()</code></a> and <ahref="/usr/share/gtk-doc/html/libgnomeui/GnomeIconList.html#gnome-icon-list-get-icon-data"><code class="function">gnome_icon_list_get_icon_data()</code></a>. With <a class="link" href="GtkIconView.html" title="GtkIconView"><span class="type">GtkIconView</span></a> such data is most conveniently stored in an extra column in the tree model, so you would call a function like </p><div class="informalexample"><pre class="programlisting"> void set_icon_data (GtkIconView *icon_view, gint idx, gpointer data) { GtkTreeModel *model; GtkTreeIter iter; model = gtk_icon_view_get_model (icon_view); if (gtk_tree_model_iter_nth_child (model, &iter, NULL, idx)) gtk_list_store_set (GTK_LIST_STORE (model), &iter, DATA_COLUMN, data, -1); } </pre></div><p> assuming that your tree model has a <code class="literal">DATA_COLUMN</code> of type <ahref="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#G-TYPE-POINTER:CAPS"><code class="literal">G_TYPE_POINTER</code></a>. </p><p> There is a number of minor API differences between <span class="structname">GnomeIconList</span> and <span class="structname">GtkIconView</span>: </p><div class="itemizedlist"><ul type="disc"><li><p> <span style="color: red"><typename>GnomeIconListMode</typename></span> is replaced by the <a class="link" href="GtkIconView.html#GtkIconView--orientation">orientation</a> property of <span class="structname">GtkIconView</span> </p></li><li><p> <span class="structname">GtkIconView</span> can not be frozen in the same way as <span class="structname">GnomeIconList</span> can with <ahref="/usr/share/gtk-doc/html/libgnomeui/GnomeIconList.html#gnome-icon-list-freeze"><code class="function">gnome_icon_list_freeze()</code></a> and <ahref="/usr/share/gtk-doc/html/libgnomeui/GnomeIconList.html#gnome-icon-list-thaw"><code class="function">gnome_icon_list_thaw()</code></a>. Instead you can replace the whole model of a <span class="structname">GtkIconView</span>, instead of doing many small changes to the existing model. </p></li></ul></div><p> </p></div></body></html>⌨️ 快捷键说明
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