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Add link support to GtkLabel

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This patch is based on SexyUrlLabel, but with significantly enhanced
functionality: keynav, tooltips, context menu, theming.
This commit is contained in:
Matthias Clasen
2009-05-11 01:23:13 -04:00
parent 141ddd99f3
commit 9dbb30482b
8 changed files with 1459 additions and 229 deletions
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3
demos/gtk-demo/Makefile.am
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@@ -3,7 +3,7 @@ include $(top_srcdir)/Makefile.decl
democodedir=$(datadir)/gtk-2.0/demo
## These should be in the order you want them to appear in the
## These should be in the order you want them to appear in the
## demo app, which means alphabetized by demo title, not filename
demos = \
appwindow.c \
@@ -23,6 +23,7 @@ demos = \
iconview.c \
iconview_edit.c \
images.c \
links.c \
list_store.c \
menus.c \
panes.c \

88
demos/gtk-demo/links.c Normal file
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@@ -0,0 +1,88 @@
/* Links
*
* GtkLabel can show hyperlinks. The default action is to call
* gtk_show_uri() on their URI, but it is possible to override
* this with a custom handler.
*/
#include <gtk/gtk.h>
static void
response_cb (GtkWidget *dialog,
gint response_id,
gpointer data)
{
gtk_widget_destroy (dialog);
}
static gboolean
activate_link (GtkWidget *label,
gpointer data)
{
const gchar *uri;
uri = gtk_label_get_current_uri (GTK_LABEL (label));
if (g_strcmp0 (uri, "keynav") == 0)
{
GtkWidget *dialog;
GtkWidget *parent;
parent = gtk_widget_get_toplevel (label);
dialog = gtk_message_dialog_new_with_markup (GTK_WINDOW (parent),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_INFO,
GTK_BUTTONS_OK,
"The term <i>keynav</i> is a shorthand for "
"keyboard navigation and refers to the process of using "
"a program (exclusively) via keyboard input.");
gtk_window_present (GTK_WINDOW (dialog));
g_signal_connect (dialog, "response", G_CALLBACK (response_cb), NULL);
return TRUE;
}
return FALSE;
}
GtkWidget *
do_links (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
GtkWidget *box;
GtkWidget *label;
if (!window)
{
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_screen (GTK_WINDOW (window),
gtk_widget_get_screen (do_widget));
gtk_container_set_border_width (GTK_CONTAINER (window), 12);
g_signal_connect (window, "destroy",
G_CALLBACK(gtk_widget_destroyed), &window);
g_signal_connect (window, "delete-event",
G_CALLBACK (gtk_true), NULL);
label = gtk_label_new ("Some <a href=\"http://en.wikipedia.org/wiki/Text\""
"title=\"plain text\">text</a> may be marked up\n"
"as hyperlinks, which can be clicked\n"
"or activated via <a href=\"keynav\">keynav</a>");
gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
g_signal_connect (label, "activate-link", G_CALLBACK (activate_link), NULL);
gtk_container_add (GTK_CONTAINER (window), label);
gtk_widget_show (label);
}
if (!GTK_WIDGET_VISIBLE (window))
{
gtk_widget_show (window);
}
else
{
gtk_widget_destroy (window);
window = NULL;
}
return window;
}

18
docs/reference/gtk/tmpl/gtklabel.sgml
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@@ -162,6 +162,24 @@ aligns in its available space, see gtk_misc_set_alignment().
</refsect2>
<refsect2>
<title>Links</title>
<para>
Since 2.18, GTK+ supports markup for clickable hyperlinks in addition
to regular Pango markup. The markup for links is borrowed from HTML, using the
<tag>a</tag> with href and title attributes. GTK+ renders links similar to the
way they appear in web browsers, with colored, underlined text. The title
attribute is displayed as a tooltip on the link. An example looks like this:
<informalexample><programlisting>
gtk_label_set_markup (label, "Go to the &lt;a href=\"http://www.gtk.org\" title=\"&amp;lt;i&amp;gt;Our&amp;/i&amp;gt; website\"&gt;GTK+ website</a> for more...");
</programlisting></informalexample>
It is possible to implement custom handling for links with the
#GtkLabel::activate-link signal and the gtk_label_get_current_uri() function.
</para>
</refsect2>
<!-- ##### SECTION See_Also ##### -->
<para>

1
gtk/gtk.symbols
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@@ -2210,6 +2210,7 @@ gtk_label_set_text_with_mnemonic
gtk_label_set_use_markup
gtk_label_set_use_underline
gtk_label_set_width_chars
gtk_label_get_current_uri
#endif
#endif

1513
gtk/gtklabel.c
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File diff suppressed because it is too large Load Diff

5
gtk/gtklabel.h
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@@ -96,11 +96,12 @@ struct _GtkLabelClass
void (* populate_popup) (GtkLabel *label,
GtkMenu *menu);
gboolean (*activate_link) (GtkLabel *label);
/* Padding for future expansion */
void (*_gtk_reserved1) (void);
void (*_gtk_reserved2) (void);
void (*_gtk_reserved3) (void);
void (*_gtk_reserved4) (void);
};
GType gtk_label_get_type (void) G_GNUC_CONST;
@@ -174,6 +175,8 @@ void gtk_label_set_single_line_mode (GtkLabel *label,
gboolean single_line_mode);
gboolean gtk_label_get_single_line_mode (GtkLabel *label);
G_CONST_RETURN gchar *gtk_label_get_current_uri (GtkLabel *label);
#ifndef GTK_DISABLE_DEPRECATED
#define gtk_label_set gtk_label_set_text

52
tests/testgtk.c
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@@ -2961,6 +2961,49 @@ create_selectable_control (GtkWidget *widget)
return button;
}
static void
dialog_response (GtkWidget *dialog, gint response_id, GtkLabel *label)
{
const gchar *text;
gtk_widget_destroy (dialog);
text = "Some <a href=\"http://en.wikipedia.org/wiki/Text\" title=\"plain text\">text</a> may be marked up\n"
"as hyperlinks, which can be clicked\n"
"or activated via <a href=\"keynav\">keynav</a>.\n"
"The links remain the same.";
gtk_label_set_markup (label, text);
}
static gboolean
activate_link (GtkWidget *label, gpointer data)
{
const gchar *uri;
uri = gtk_label_get_current_uri (GTK_LABEL (label));
if (g_strcmp0 (uri, "keynav") == 0)
{
GtkWidget *dialog;
dialog = gtk_message_dialog_new_with_markup (GTK_WINDOW (gtk_widget_get_toplevel (label)),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_INFO,
GTK_BUTTONS_OK,
"The term <i>keynav</i> is a shorthand for "
"keyboard navigation and refers to the process of using a program "
"(exclusively) via keyboard input.");
gtk_window_present (GTK_WINDOW (dialog));
g_signal_connect (dialog, "response", G_CALLBACK (dialog_response), label);
return TRUE;
}
return FALSE;
}
void create_labels (GtkWidget *widget)
{
static GtkWidget *window = NULL;
@@ -3048,6 +3091,15 @@ void create_labels (GtkWidget *widget)
gtk_container_add (GTK_CONTAINER (frame), label);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
frame = gtk_frame_new ("Links in a label");
label = gtk_label_new ("Some <a href=\"http://en.wikipedia.org/wiki/Text\" title=\"plain text\">text</a> may be marked up\n"
"as hyperlinks, which can be clicked\n"
"or activated via <a href=\"keynav\">keynav</a>");
gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
gtk_container_add (GTK_CONTAINER (frame), label);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
g_signal_connect (label, "activate-link", G_CALLBACK (activate_link), NULL);
vbox = gtk_vbox_new (FALSE, 5);
gtk_box_pack_start (GTK_BOX (hbox), vbox, FALSE, FALSE, 0);
frame = gtk_frame_new ("Line wrapped label");

8
tests/testgtkrc
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@@ -78,6 +78,14 @@ style "button" = "default"
# bg[PRELIGHT] = { 0.75, 0, 0x00 }
}
style "label" = "default"
{
base[PRELIGHT] = "gray"
base[ACTIVE] = mix (0.9, "gray", "purple")
}
class "GtkLabel" style "label"
style "toggle_button" = "button"
{
fg[NORMAL] = { 1.0, 0, 0 }