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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 GnomeHRef to GtkLinkButton</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="gtkrecent-advanced.html" title="Advanced usage"><link rel="next" href="gtk-migrating-GtkBuilder.html" title="Migrating from libglade to GtkBuilder"><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 Hierarchy"><link 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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-GtkBuilder.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-GtkLinkButton"></a>Migrating from GnomeHRef to GtkLinkButton</h2></div></div></div><p> Since version 2.10, GTK+ provides the <a class="link" href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> widget as a replacement for the <span class="structname">GnomeHRef</span> widget in the libgnomeui library. </p><p> Porting an application from <span class="structname">GnomeHRef</span> to <a class="link" href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> is very simple. <a class="link" href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> does not have a default action for <a class="link" href="GtkButton.html#GtkButton-clicked"><span class="type">"clicked"</span></a> signal. So instead of simply creating the widget </p><div class="informalexample"><pre class="programlisting"> GtkWidget *button; button = gnome_href_new (url, ""); </pre></div><p> you will have to handle the activation of the <a class="link" href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a>, using the ::clicked signal for instance </p><div class="informalexample"><pre class="programlisting"> static void link_button_clicked_cb (GtkWidget *widget, gpointer data) { const gchar *link; link = gtk_link_button_get_uri (GTK_LINK_BUTTON (widget)); open_browser_at_url (link); } /* ... */ GtkWidget *button; button = gtk_link_button_new (url); g_signal_connect (button, "clicked", G_CALLBACK (link_button_clicked_cb), NULL); </pre></div><p> If you have more than one <a class="link" href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> instead of connecting a signal to each one, you can use a "hook function" which will be called whenever a user activates a link button </p><div class="informalexample"><pre class="programlisting"> static void link_button_hook (GtkLinkButton *button, const gchar *link, gpointer user_data) { open_browser_at_url (link); } /* ... */ GtkWidget *button1 = gtk_link_button_new (uri1); GtkWidget *button2 = gtk_link_button_new (uri2); gtk_link_button_set_uri_hook (link_button_hook, NULL, NULL); </pre></div><p> </p></div></body></html>⌨️ 快捷键说明
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