[gnome-control-center] datetime: Add UI code to reorder date widgets

[Bastien Nocera <hadess src gnome org>]

commit c93e7add24047ed51d693d1f835f235e5c9e3592
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Mar 8 06:47:19 2011 +0000

    datetime: Add UI code to reorder date widgets
    
    Based on the locale's date format, rather than only support
    the US-centric version.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=636896

 panels/datetime/Makefile.am         |    2 +
 panels/datetime/cc-datetime-panel.c |   38 +++++++++++++++++++++++++
 panels/datetime/date-endian.c       |   53 +++++++++++++++++++++++++++++++++++
 panels/datetime/date-endian.h       |   30 +++++++++++++++++++
 4 files changed, 123 insertions(+), 0 deletions(-)
---
diff --git a/panels/datetime/Makefile.am b/panels/datetime/Makefile.am
index f29d8e9..1d48bae 100644
--- a/panels/datetime/Makefile.am
+++ b/panels/datetime/Makefile.am
@@ -95,6 +95,8 @@ libdate_time_la_SOURCES =	\
 	cc-timezone-map.h	\
 	set-timezone.c		\
 	set-timezone.h		\
+	date-endian.c		\
+	date-endian.h		\
 	tz.c tz.h
 
 libdate_time_la_LIBADD = $(PANEL_LIBS) $(DATETIME_PANEL_LIBS)
diff --git a/panels/datetime/cc-datetime-panel.c b/panels/datetime/cc-datetime-panel.c
index 89810a7..369ea1e 100644
--- a/panels/datetime/cc-datetime-panel.c
+++ b/panels/datetime/cc-datetime-panel.c
@@ -25,6 +25,7 @@
 #include "cc-timezone-map.h"
 #include "set-timezone.h"
 #include "cc-lockbutton.h"
+#include "date-endian.h"
 
 #include <gsettings-desktop-schemas/gdesktop-enums.h>
 #include <string.h>
@@ -743,6 +744,40 @@ on_permission_changed (GPermission *permission,
 }
 
 static void
+reorder_date_widget (DateEndianess           endianess,
+		     CcDateTimePanelPrivate *priv)
+{
+  GtkWidget *month, *day, *year;
+  GtkBox *box;
+
+  if (endianess == DATE_ENDIANESS_MIDDLE)
+    return;
+
+  month = W ("month-combobox");
+  day = W ("day-spinbutton");
+  year = W("year-spinbutton");
+
+  box = GTK_BOX (W("table1"));
+
+  switch (endianess) {
+  case DATE_ENDIANESS_LITTLE:
+    gtk_box_reorder_child (box, month, 0);
+    gtk_box_reorder_child (box, day, 0);
+    gtk_box_reorder_child (box, year, -1);
+    break;
+  case DATE_ENDIANESS_BIG:
+    gtk_box_reorder_child (box, month, 0);
+    gtk_box_reorder_child (box, year, 0);
+    gtk_box_reorder_child (box, day, -1);
+    break;
+  case DATE_ENDIANESS_MIDDLE:
+    /* Let's please GCC */
+    g_assert_not_reached ();
+    break;
+  }
+}
+
+static void
 cc_date_time_panel_init (CcDateTimePanel *self)
 {
   CcDateTimePanelPrivate *priv;
@@ -760,6 +795,7 @@ cc_date_time_panel_init (CcDateTimePanel *self)
   int ret;
   GtkWidget *lockbutton;
   GPermission *permission;
+  DateEndianess endianess;
 
   priv = self->priv = DATE_TIME_PANEL_PRIVATE (self);
 
@@ -792,6 +828,8 @@ cc_date_time_panel_init (CcDateTimePanel *self)
 
   /* set up date editing widgets */
   priv->date = g_date_time_new_now_local ();
+  endianess = date_endian_get_default ();
+  reorder_date_widget (endianess, priv);
 
   gtk_combo_box_set_active (GTK_COMBO_BOX (W ("month-combobox")),
                             g_date_time_get_month (priv->date) - 1);
diff --git a/panels/datetime/date-endian.c b/panels/datetime/date-endian.c
new file mode 100644
index 0000000..a45f849
--- /dev/null
+++ b/panels/datetime/date-endian.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2011 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Author: Bastien Nocera <hadess hadess net>
+ *
+ */
+
+#include <langinfo.h>
+#include <locale.h>
+#include <glib.h>
+
+#include "date-endian.h"
+
+DateEndianess
+date_endian_get_default (void)
+{
+	const char *fmt;
+
+	fmt = nl_langinfo (D_FMT);
+	g_return_val_if_fail (fmt != NULL, DATE_ENDIANESS_MIDDLE);
+
+	/* FIXME, implement */
+
+	return DATE_ENDIANESS_MIDDLE;
+}
+
+DateEndianess
+date_endian_get_for_lang (const char *lang)
+{
+	const char *old_lang;
+	DateEndianess endian;
+
+	old_lang = setlocale (LC_TIME, lang);
+	endian = date_endian_get_default ();
+	setlocale (LC_TIME, old_lang);
+
+	return endian;
+}
+
diff --git a/panels/datetime/date-endian.h b/panels/datetime/date-endian.h
new file mode 100644
index 0000000..3c10a6b
--- /dev/null
+++ b/panels/datetime/date-endian.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2011 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Author: Bastien Nocera <hadess hadess net>
+ *
+ */
+
+/* From http://en.wikipedia.org/wiki/Date_notation_by_country */
+typedef enum {
+  DATE_ENDIANESS_BIG,    /* Big-endian (year, month, day), e.g. 03-04-05 */
+  DATE_ENDIANESS_LITTLE, /* Little-endian (day, month, year), e.g. 05/04/03 */
+  DATE_ENDIANESS_MIDDLE  /* Middle-endian (month, day, year), e.g. 04/05/03 */
+} DateEndianess;
+
+DateEndianess date_endian_get_default (void);
+DateEndianess date_endian_get_for_lang (const char *lang);