[gnome-control-center] shell: Add GtkListBox helpers

[Bastien Nocera <hadess src gnome org>]

commit b3a61bc6f545f460ac0cb374de9b7de18986a8e6
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Jun 23 15:34:02 2014 +0200

    shell: Add GtkListBox helpers
    
    Add helpers for GtkListBox sizing, and setting separators.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=732106

 shell/Makefile.am       |    2 +
 shell/list-box-helper.c |   72 +++++++++++++++++++++++++++++++++++++++++++++++
 shell/list-box-helper.h |   27 +++++++++++++++++
 3 files changed, 101 insertions(+), 0 deletions(-)
---
diff --git a/shell/Makefile.am b/shell/Makefile.am
index ad7a68f..3b15cbb 100644
--- a/shell/Makefile.am
+++ b/shell/Makefile.am
@@ -41,6 +41,8 @@ gnome_control_center_SOURCES =                        \
        hostname-helper.h                       \
        cc-hostname-entry.c                     \
        cc-hostname-entry.h                     \
+       list-box-helper.h                       \
+       list-box-helper.c                       \
        $(MARSHAL_FILES)
 
 gnome_control_center_LDFLAGS = -export-dynamic
diff --git a/shell/list-box-helper.c b/shell/list-box-helper.c
new file mode 100644
index 0000000..ba3f44d
--- /dev/null
+++ b/shell/list-box-helper.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2014 Red Hat, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "list-box-helper.h"
+
+#define MAX_ROWS_VISIBLE 5
+
+void
+cc_list_box_update_header_func (GtkListBoxRow *row,
+                                GtkListBoxRow *before,
+                                gpointer user_data)
+{
+  GtkWidget *current;
+
+  if (before == NULL)
+    return;
+
+  current = gtk_list_box_row_get_header (row);
+  if (current == NULL)
+    {
+      current = gtk_separator_new (GTK_ORIENTATION_HORIZONTAL);
+      gtk_widget_show (current);
+      gtk_list_box_row_set_header (row, current);
+    }
+}
+
+void
+cc_list_box_adjust_scrolling (GtkScrolledWindow *scrolled_window)
+{
+  GtkWidget *listbox;
+  GtkWidget *parent;
+  GList *children;
+  guint n_rows;
+
+  listbox = gtk_bin_get_child (GTK_BIN (scrolled_window));
+  parent = gtk_widget_get_parent (GTK_WIDGET (scrolled_window));
+  children = gtk_container_get_children (GTK_CONTAINER (listbox));
+  n_rows = g_list_length (children);
+  g_list_free (children);
+
+  if (n_rows >= MAX_ROWS_VISIBLE)
+    {
+      gint height;
+
+      gtk_widget_get_preferred_height (parent, NULL, &height);
+      gtk_widget_set_size_request (parent, -1, height);
+
+      gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
+                                      GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
+    }
+  else
+    {
+      gtk_widget_set_size_request (parent, -1, -1);
+      gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
+                                      GTK_POLICY_NEVER, GTK_POLICY_NEVER);
+    }
+}
diff --git a/shell/list-box-helper.h b/shell/list-box-helper.h
new file mode 100644
index 0000000..327a85d
--- /dev/null
+++ b/shell/list-box-helper.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2014 Red Hat, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <gtk/gtk.h>
+
+void
+cc_list_box_update_header_func (GtkListBoxRow *row,
+                                GtkListBoxRow *before,
+                                gpointer user_data);
+
+void
+cc_list_box_adjust_scrolling (GtkScrolledWindow *scrolled_window);