[tepl] AstractFactory: add create_tab_label()

[Sébastien Wilmet <swilmet src gnome org>]

commit 0ae97bdc1a468373117d3e5267617dd001dca13e
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Jul 29 19:49:09 2017 +0200

    AstractFactory: add create_tab_label()

 docs/reference/tepl-3.0-sections.txt |    1 +
 tepl/tepl-abstract-factory.c         |   30 ++++++++++++++++++++++++++++++
 tepl/tepl-abstract-factory.h         |    8 ++++++++
 tepl/tepl-notebook.c                 |    9 +++++++--
 4 files changed, 46 insertions(+), 2 deletions(-)
---
diff --git a/docs/reference/tepl-3.0-sections.txt b/docs/reference/tepl-3.0-sections.txt
index 9e4d97e..93a9375 100644
--- a/docs/reference/tepl-3.0-sections.txt
+++ b/docs/reference/tepl-3.0-sections.txt
@@ -182,6 +182,7 @@ TeplAbstractFactoryClass
 tepl_abstract_factory_set_singleton
 tepl_abstract_factory_get_singleton
 tepl_abstract_factory_create_tab
+tepl_abstract_factory_create_tab_label
 <SUBSECTION Standard>
 TEPL_ABSTRACT_FACTORY
 TEPL_ABSTRACT_FACTORY_CLASS
diff --git a/tepl/tepl-abstract-factory.c b/tepl/tepl-abstract-factory.c
index 0015ab5..7000bd8 100644
--- a/tepl/tepl-abstract-factory.c
+++ b/tepl/tepl-abstract-factory.c
@@ -61,6 +61,14 @@ tepl_abstract_factory_create_tab_default (TeplAbstractFactory *factory)
        return tepl_tab_new ();
 }
 
+static GtkWidget *
+tepl_abstract_factory_create_tab_label_default (TeplAbstractFactory *factory,
+                                               TeplTab             *tab)
+{
+       /* TODO implement a default TeplTabLabel widget. */
+       return NULL;
+}
+
 static void
 tepl_abstract_factory_class_init (TeplAbstractFactoryClass *klass)
 {
@@ -69,6 +77,7 @@ tepl_abstract_factory_class_init (TeplAbstractFactoryClass *klass)
        object_class->finalize = tepl_abstract_factory_finalize;
 
        klass->create_tab = tepl_abstract_factory_create_tab_default;
+       klass->create_tab_label = tepl_abstract_factory_create_tab_label_default;
 }
 
 static void
@@ -155,3 +164,24 @@ tepl_abstract_factory_create_tab (TeplAbstractFactory *factory)
 
        return TEPL_ABSTRACT_FACTORY_GET_CLASS (factory)->create_tab (factory);
 }
+
+/**
+ * tepl_abstract_factory_create_tab_label:
+ * @factory: the #TeplAbstractFactory.
+ * @tab: a #TeplTab.
+ *
+ * Creates a new tab label for @tab, suitable for gtk_notebook_set_tab_label().
+ *
+ * Returns: (transfer floating) (nullable): a new #GtkWidget, or %NULL for the
+ * default tab label (“page N” with #GtkNotebook).
+ * Since: 3.0
+ */
+GtkWidget *
+tepl_abstract_factory_create_tab_label (TeplAbstractFactory *factory,
+                                       TeplTab             *tab)
+{
+       g_return_val_if_fail (TEPL_IS_ABSTRACT_FACTORY (factory), NULL);
+       g_return_val_if_fail (TEPL_IS_TAB (tab), NULL);
+
+       return TEPL_ABSTRACT_FACTORY_GET_CLASS (factory)->create_tab_label (factory, tab);
+}
diff --git a/tepl/tepl-abstract-factory.h b/tepl/tepl-abstract-factory.h
index d232d19..697d820 100644
--- a/tepl/tepl-abstract-factory.h
+++ b/tepl/tepl-abstract-factory.h
@@ -48,6 +48,8 @@ struct _TeplAbstractFactory
  * @parent_class: The parent class.
  * @create_tab: Virtual function pointer for tepl_abstract_factory_create_tab().
  *   By default the #TeplTab is created with tepl_tab_new().
+ * @create_tab_label: Virtual function pointer for
+ *   tepl_abstract_factory_create_tab_label(). By default %NULL is returned.
  */
 struct _TeplAbstractFactoryClass
 {
@@ -55,6 +57,9 @@ struct _TeplAbstractFactoryClass
 
        TeplTab *       (* create_tab)          (TeplAbstractFactory *factory);
 
+       GtkWidget *     (* create_tab_label)    (TeplAbstractFactory *factory,
+                                                TeplTab             *tab);
+
        /*< private >*/
        gpointer padding[12];
 };
@@ -67,6 +72,9 @@ TeplAbstractFactory * tepl_abstract_factory_get_singleton             (void);
 
 TeplTab *              tepl_abstract_factory_create_tab                (TeplAbstractFactory *factory);
 
+GtkWidget *            tepl_abstract_factory_create_tab_label          (TeplAbstractFactory *factory,
+                                                                        TeplTab             *tab);
+
 G_GNUC_INTERNAL
 void                   _tepl_abstract_factory_unref_singleton          (void);
 
diff --git a/tepl/tepl-notebook.c b/tepl/tepl-notebook.c
index 8832a11..0955e9d 100644
--- a/tepl/tepl-notebook.c
+++ b/tepl/tepl-notebook.c
@@ -18,6 +18,7 @@
  */
 
 #include "tepl-notebook.h"
+#include "tepl-abstract-factory.h"
 #include "tepl-tab-group.h"
 #include "tepl-tab.h"
 #include "tepl-signal-group.h"
@@ -274,9 +275,13 @@ tepl_notebook_append_tab_vfunc (TeplTabGroup *tab_group,
                                TeplTab      *tab)
 {
        GtkNotebook *notebook = GTK_NOTEBOOK (tab_group);
+       TeplAbstractFactory *factory;
+       GtkWidget *tab_label;
 
-       /* TODO implement a TeplTabLabel widget. */
-       gtk_notebook_append_page (notebook, GTK_WIDGET (tab), NULL);
+       factory = tepl_abstract_factory_get_singleton ();
+       tab_label = tepl_abstract_factory_create_tab_label (factory, tab);
+
+       gtk_notebook_append_page (notebook, GTK_WIDGET (tab), tab_label);
 }
 
 static void