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[PATCH 1/2] Add TimezoneMap widget to AnacondaWidgets



---
 widgets/src/Makefile.am   |    4 +
 widgets/src/TimezoneMap.c |  643 +++++++++++++++++++++++++++++++++++++++++++++
 widgets/src/TimezoneMap.h |   87 ++++++
 widgets/src/tz.c          |  482 +++++++++++++++++++++++++++++++++
 widgets/src/tz.h          |   92 +++++++
 5 files changed, 1308 insertions(+), 0 deletions(-)
 create mode 100644 widgets/src/TimezoneMap.c
 create mode 100644 widgets/src/TimezoneMap.h
 create mode 100644 widgets/src/tz.c
 create mode 100644 widgets/src/tz.h

diff --git a/widgets/src/Makefile.am b/widgets/src/Makefile.am
index acac3b0..e33e72c 100644
--- a/widgets/src/Makefile.am
+++ b/widgets/src/Makefile.am
@@ -31,6 +31,8 @@ SOURCES = BaseWindow.c \
 	 SpokeSelector.c \
 	 SpokeWindow.c \
 	 StandaloneWindow.c \
+	 TimezoneMap.c \
+	 tz.c \
 	 lightbox.c
 
 HDRS = BaseWindow.h \
@@ -39,6 +41,8 @@ HDRS = BaseWindow.h \
 	 SpokeSelector.h \
 	 SpokeWindow.h \
 	 StandaloneWindow.h \
+	 TimezoneMap.h \
+	 tz.h \
 	 lightbox.h
 
 noinst_HEADERS = gettext.h intl.h
diff --git a/widgets/src/TimezoneMap.c b/widgets/src/TimezoneMap.c
new file mode 100644
index 0000000..70ada89
--- /dev/null
+++ b/widgets/src/TimezoneMap.c
@@ -0,0 +1,643 @@
+/* Copyright (C) 2012 Red Hat, Inc
+ *
+ * Heavily based on the code from gnome-control-center, Copyright (C) 2010 Intel, Inc.
+ * Written by Thomas Wood <thomas wood intel com>
+ *
+ * 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: Vratislav Podzimek <vpodzime redhat com>
+ *
+ */
+
+#include "TimezoneMap.h"
+#include <math.h>
+#include <string.h>
+#include "tz.h"
+
+/**
+ * SECTION: TimezoneMap
+ * @title: AnacondaTimezoneMap
+ * @short_description: An interactive map for timezone selection
+ *
+ * A #AnacondaTimezoneMap is a widget that can be used for timezone selection.
+ * The most important is the ::timezone-changed signal that includes the newly
+ * selected timezone.
+ */
+
+G_DEFINE_TYPE (AnacondaTimezoneMap, anaconda_timezone_map, GTK_TYPE_WIDGET)
+
+#define TIMEZONE_MAP_PRIVATE(o) \
+  (G_TYPE_INSTANCE_GET_PRIVATE ((o), ANACONDA_TYPE_TIMEZONE_MAP, AnacondaTimezoneMapPrivate))
+
+
+typedef struct
+{
+  gdouble offset;
+  guchar red;
+  guchar green;
+  guchar blue;
+  guchar alpha;
+} AnacondaTimezoneMapOffset;
+
+struct _AnacondaTimezoneMapPrivate
+{
+  GdkPixbuf *orig_background;
+  GdkPixbuf *orig_color_map;
+
+  GdkPixbuf *background;
+  GdkPixbuf *color_map;
+
+  guchar *visible_map_pixels;
+  gint visible_map_rowstride;
+
+  gdouble selected_offset;
+
+  TzDB *tzdb;
+  TzLocation *location;
+};
+
+enum
+{
+  TIMEZONE_CHANGED,
+  LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL];
+
+
+static AnacondaTimezoneMapOffset color_codes[] =
+{
+    {-11.0, 43, 0, 0, 255 },
+    {-10.0, 85, 0, 0, 255 },
+    {-9.5, 102, 255, 0, 255 },
+    {-9.0, 128, 0, 0, 255 },
+    {-8.0, 170, 0, 0, 255 },
+    {-7.0, 212, 0, 0, 255 },
+    {-6.0, 255, 0, 1, 255 }, // north
+    {-6.0, 255, 0, 0, 255 }, // south
+    {-5.0, 255, 42, 42, 255 },
+    {-4.5, 192, 255, 0, 255 },
+    {-4.0, 255, 85, 85, 255 },
+    {-3.5, 0, 255, 0, 255 },
+    {-3.0, 255, 128, 128, 255 },
+    {-2.0, 255, 170, 170, 255 },
+    {-1.0, 255, 213, 213, 255 },
+    {0.0, 43, 17, 0, 255 },
+    {1.0, 85, 34, 0, 255 },
+    {2.0, 128, 51, 0, 255 },
+    {3.0, 170, 68, 0, 255 },
+    {3.5, 0, 255, 102, 255 },
+    {4.0, 212, 85, 0, 255 },
+    {4.5, 0, 204, 255, 255 },
+    {5.0, 255, 102, 0, 255 },
+    {5.5, 0, 102, 255, 255 },
+    {5.75, 0, 238, 207, 247 },
+    {6.0, 255, 127, 42, 255 },
+    {6.5, 204, 0, 254, 254 },
+    {7.0, 255, 153, 85, 255 },
+    {8.0, 255, 179, 128, 255 },
+    {9.0, 255, 204, 170, 255 },
+    {9.5, 170, 0, 68, 250 },
+    {10.0, 255, 230, 213, 255 },
+    {10.5, 212, 124, 21, 250 },
+    {11.0, 212, 170, 0, 255 },
+    {11.5, 249, 25, 87, 253 },
+    {12.0, 255, 204, 0, 255 },
+    {12.75, 254, 74, 100, 248 },
+    {13.0, 255, 85, 153, 250 },
+    {-100, 0, 0, 0, 0 }
+};
+
+/**
+ * anaconda_timezone_map_new:
+ *
+ * Creates a new #AnacondaTimezoneMap.
+ *
+ * Returns: A new #AnacondaTimezoneMap
+ */
+GtkWidget *anaconda_timezone_map_new ()
+{
+    return g_object_new(ANACONDA_TYPE_TIMEZONE_MAP, NULL);
+}
+
+static void
+anaconda_timezone_map_get_property (GObject    *object,
+                              guint       property_id,
+                              GValue     *value,
+                              GParamSpec *pspec)
+{
+  switch (property_id)
+    {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+    }
+}
+
+static void
+anaconda_timezone_map_set_property (GObject      *object,
+                              guint         property_id,
+                              const GValue *value,
+                              GParamSpec   *pspec)
+{
+  switch (property_id)
+    {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+    }
+}
+
+static void
+anaconda_timezone_map_dispose (GObject *object)
+{
+  AnacondaTimezoneMapPrivate *priv = ANACONDA_TIMEZONE_MAP (object)->priv;
+
+  if (priv->orig_background)
+    {
+      g_object_unref (priv->orig_background);
+      priv->orig_background = NULL;
+    }
+
+  if (priv->orig_color_map)
+    {
+      g_object_unref (priv->orig_color_map);
+      priv->orig_color_map = NULL;
+    }
+
+  if (priv->background)
+    {
+      g_object_unref (priv->background);
+      priv->background = NULL;
+    }
+
+  if (priv->color_map)
+    {
+      g_object_unref (priv->color_map);
+      priv->color_map = NULL;
+
+      priv->visible_map_pixels = NULL;
+      priv->visible_map_rowstride = 0;
+    }
+
+  G_OBJECT_CLASS (anaconda_timezone_map_parent_class)->dispose (object);
+}
+
+static void
+anaconda_timezone_map_finalize (GObject *object)
+{
+  AnacondaTimezoneMapPrivate *priv = ANACONDA_TIMEZONE_MAP (object)->priv;
+
+  if (priv->tzdb)
+    {
+      tz_db_free (priv->tzdb);
+      priv->tzdb = NULL;
+    }
+
+
+  G_OBJECT_CLASS (anaconda_timezone_map_parent_class)->finalize (object);
+}
+
+/* GtkWidget functions */
+static void
+anaconda_timezone_map_get_preferred_width (GtkWidget *widget,
+                                     gint      *minimum,
+                                     gint      *natural)
+{
+  /* choose a minimum size small enough to prevent the window
+   * from growing horizontally
+   */
+  if (minimum != NULL)
+    *minimum = 300;
+  if (natural != NULL)
+    *natural = 300;
+}
+
+static void
+anaconda_timezone_map_get_preferred_height (GtkWidget *widget,
+                                      gint      *minimum,
+                                      gint      *natural)
+{
+  AnacondaTimezoneMapPrivate *priv = ANACONDA_TIMEZONE_MAP (widget)->priv;
+  gint size;
+
+  /* The + 20 here is a slight tweak to make the map fill the
+   * panel better without causing horizontal growing
+   */
+  size = 300 * gdk_pixbuf_get_height (priv->orig_background) / gdk_pixbuf_get_width (priv->orig_background) + 20;
+  if (minimum != NULL)
+    *minimum = size;
+  if (natural != NULL)
+    *natural = size;
+}
+
+static void
+anaconda_timezone_map_size_allocate (GtkWidget     *widget,
+                               GtkAllocation *allocation)
+{
+  AnacondaTimezoneMapPrivate *priv = ANACONDA_TIMEZONE_MAP (widget)->priv;
+
+  if (priv->background)
+    g_object_unref (priv->background);
+
+  priv->background = gdk_pixbuf_scale_simple (priv->orig_background,
+                                              allocation->width,
+                                              allocation->height,
+                                              GDK_INTERP_BILINEAR);
+
+  if (priv->color_map)
+    g_object_unref (priv->color_map);
+
+  priv->color_map = gdk_pixbuf_scale_simple (priv->orig_color_map,
+                                             allocation->width,
+                                             allocation->height,
+                                             GDK_INTERP_BILINEAR);
+
+  priv->visible_map_pixels = gdk_pixbuf_get_pixels (priv->color_map);
+  priv->visible_map_rowstride = gdk_pixbuf_get_rowstride (priv->color_map);
+
+  GTK_WIDGET_CLASS (anaconda_timezone_map_parent_class)->size_allocate (widget,
+                                                                  allocation);
+}
+
+static void
+anaconda_timezone_map_realize (GtkWidget *widget)
+{
+  GdkWindowAttr attr = { 0, };
+  GtkAllocation allocation;
+  GdkCursor *cursor;
+  GdkWindow *window;
+
+  gtk_widget_get_allocation (widget, &allocation);
+
+  gtk_widget_set_realized (widget, TRUE);
+
+  attr.window_type = GDK_WINDOW_CHILD;
+  attr.wclass = GDK_INPUT_OUTPUT;
+  attr.width = allocation.width;
+  attr.height = allocation.height;
+  attr.x = allocation.x;
+  attr.y = allocation.y;
+  attr.event_mask = gtk_widget_get_events (widget)
+                                 | GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
+
+  window = gdk_window_new (gtk_widget_get_parent_window (widget), &attr,
+                           GDK_WA_X | GDK_WA_Y);
+
+  cursor = gdk_cursor_new (GDK_HAND2);
+  gdk_window_set_cursor (window, cursor);
+
+  gdk_window_set_user_data (window, widget);
+  gtk_widget_set_window (widget, window);
+}
+
+
+static gdouble
+convert_longtitude_to_x (gdouble longitude, gint map_width)
+{
+  const gdouble xdeg_offset = -6;
+  gdouble x;
+
+  x = (map_width * (180.0 + longitude) / 360.0)
+    + (map_width * xdeg_offset / 180.0);
+
+  return x;
+}
+
+static gdouble
+radians (gdouble degrees)
+{
+  return (degrees / 360.0) * G_PI * 2;
+}
+
+static gdouble
+convert_latitude_to_y (gdouble latitude, gdouble map_height)
+{
+  gdouble bottom_lat = -59;
+  gdouble top_lat = 81;
+  gdouble top_per, y, full_range, top_offset, map_range;
+
+  top_per = top_lat / 180.0;
+  y = 1.25 * log (tan (G_PI_4 + 0.4 * radians (latitude)));
+  full_range = 4.6068250867599998;
+  top_offset = full_range * top_per;
+  map_range = fabs (1.25 * log (tan (G_PI_4 + 0.4 * radians (bottom_lat))) - top_offset);
+  y = fabs (y - top_offset);
+  y = y / map_range;
+  y = y * map_height;
+  return y;
+}
+
+
+static gboolean
+anaconda_timezone_map_draw (GtkWidget *widget,
+                      cairo_t   *cr)
+{
+  AnacondaTimezoneMapPrivate *priv = ANACONDA_TIMEZONE_MAP (widget)->priv;
+  GdkPixbuf *hilight, *orig_hilight, *pin;
+  GtkAllocation alloc;
+  gchar *file;
+  GError *err = NULL;
+  gdouble pointx, pointy;
+  char buf[16];
+
+  gtk_widget_get_allocation (widget, &alloc);
+
+  /* paint background */
+  gdk_cairo_set_source_pixbuf (cr, priv->background, 0, 0);
+  cairo_paint (cr);
+
+  /* paint hilight */
+  file = g_strdup_printf (DATADIR "/timezone_%s.png",
+                          g_ascii_formatd (buf, sizeof (buf),
+                                           "%g", priv->selected_offset));
+  orig_hilight = gdk_pixbuf_new_from_file (file, &err);
+  g_free (file);
+  file = NULL;
+
+  if (!orig_hilight)
+    {
+      g_warning ("Could not load hilight: %s",
+                 (err) ? err->message : "Unknown Error");
+      if (err)
+        g_clear_error (&err);
+    }
+  else
+    {
+
+      hilight = gdk_pixbuf_scale_simple (orig_hilight, alloc.width,
+                                         alloc.height, GDK_INTERP_BILINEAR);
+      gdk_cairo_set_source_pixbuf (cr, hilight, 0, 0);
+
+      cairo_paint (cr);
+      g_object_unref (hilight);
+      g_object_unref (orig_hilight);
+    }
+
+  /* load pin icon */
+  pin = gdk_pixbuf_new_from_file (DATADIR "/pin.png", &err);
+
+  if (err)
+    {
+      g_warning ("Could not load pin icon: %s", err->message);
+      g_clear_error (&err);
+    }
+
+  if (priv->location)
+    {
+      pointx = convert_longtitude_to_x (priv->location->longitude, alloc.width);
+      pointy = convert_latitude_to_y (priv->location->latitude, alloc.height);
+
+      if (pointy > alloc.height)
+        pointy = alloc.height;
+
+      if (pin)
+        {
+          gdk_cairo_set_source_pixbuf (cr, pin, pointx - 8, pointy - 14);
+          cairo_paint (cr);
+        }
+    }
+
+  if (pin)
+    {
+      g_object_unref (pin);
+    }
+
+  return TRUE;
+}
+
+
+static void
+anaconda_timezone_map_class_init (AnacondaTimezoneMapClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  g_type_class_add_private (klass, sizeof (AnacondaTimezoneMapPrivate));
+
+  object_class->get_property = anaconda_timezone_map_get_property;
+  object_class->set_property = anaconda_timezone_map_set_property;
+  object_class->dispose = anaconda_timezone_map_dispose;
+  object_class->finalize = anaconda_timezone_map_finalize;
+
+  widget_class->get_preferred_width = anaconda_timezone_map_get_preferred_width;
+  widget_class->get_preferred_height = anaconda_timezone_map_get_preferred_height;
+  widget_class->size_allocate = anaconda_timezone_map_size_allocate;
+  widget_class->realize = anaconda_timezone_map_realize;
+  widget_class->draw = anaconda_timezone_map_draw;
+
+  signals[TIMEZONE_CHANGED] = g_signal_new ("timezone-changed",
+                                            ANACONDA_TYPE_TIMEZONE_MAP,
+                                            G_SIGNAL_RUN_FIRST,
+                                            0,
+                                            NULL,
+                                            NULL,
+                                            g_cclosure_marshal_VOID__STRING,
+                                            G_TYPE_NONE, 1,
+                                            G_TYPE_STRING);
+}
+
+
+static gint
+sort_locations (TzLocation *a,
+                TzLocation *b)
+{
+  if (a->dist > b->dist)
+    return 1;
+
+  if (a->dist < b->dist)
+    return -1;
+
+  return 0;
+}
+
+static void
+set_location (AnacondaTimezoneMap *map,
+              TzLocation    *location)
+{
+  AnacondaTimezoneMapPrivate *priv = map->priv;
+  TzInfo *info;
+
+  priv->location = location;
+
+  info = tz_info_from_location (priv->location);
+
+  priv->selected_offset = tz_location_get_utc_offset (priv->location)
+    / (60.0*60.0) + ((info->daylight) ? -1.0 : 0.0);
+
+  g_signal_emit (map, signals[TIMEZONE_CHANGED], 0, priv->location->zone);
+
+  tz_info_free (info);
+}
+
+static gboolean
+button_press_event (GtkWidget      *widget,
+                    GdkEventButton *event)
+{
+  AnacondaTimezoneMapPrivate *priv = ANACONDA_TIMEZONE_MAP (widget)->priv;
+  gint x, y;
+  guchar r, g, b, a;
+  guchar *pixels;
+  gint rowstride;
+  gint i;
+
+  const GPtrArray *array;
+  gint width, height;
+  GList *distances = NULL;
+  GtkAllocation alloc;
+
+  x = event->x;
+  y = event->y;
+
+
+  rowstride = priv->visible_map_rowstride;
+  pixels = priv->visible_map_pixels;
+
+  r = pixels[(rowstride * y + x * 4)];
+  g = pixels[(rowstride * y + x * 4) + 1];
+  b = pixels[(rowstride * y + x * 4) + 2];
+  a = pixels[(rowstride * y + x * 4) + 3];
+
+
+  for (i = 0; color_codes[i].offset != -100; i++)
+    {
+       if (color_codes[i].red == r && color_codes[i].green == g
+           && color_codes[i].blue == b && color_codes[i].alpha == a)
+         {
+           priv->selected_offset = color_codes[i].offset;
+         }
+    }
+
+  gtk_widget_queue_draw (widget);
+
+  /* work out the co-ordinates */
+
+  array = tz_get_locations (priv->tzdb);
+
+  gtk_widget_get_allocation (widget, &alloc);
+  width = alloc.width;
+  height = alloc.height;
+
+  for (i = 0; i < array->len; i++)
+    {
+      gdouble pointx, pointy, dx, dy;
+      TzLocation *loc = array->pdata[i];
+
+      pointx = convert_longtitude_to_x (loc->longitude, width);
+      pointy = convert_latitude_to_y (loc->latitude, height);
+
+      dx = pointx - x;
+      dy = pointy - y;
+
+      loc->dist = dx * dx + dy * dy;
+      distances = g_list_prepend (distances, loc);
+
+    }
+  distances = g_list_sort (distances, (GCompareFunc) sort_locations);
+
+
+  set_location (ANACONDA_TIMEZONE_MAP (widget), (TzLocation*) distances->data);
+
+  g_list_free (distances);
+
+  return TRUE;
+}
+
+static void
+anaconda_timezone_map_init (AnacondaTimezoneMap *self)
+{
+  AnacondaTimezoneMapPrivate *priv;
+  GError *err = NULL;
+
+  priv = self->priv = TIMEZONE_MAP_PRIVATE (self);
+
+  priv->orig_background = gdk_pixbuf_new_from_file (DATADIR "/bg.png",
+                                                    &err);
+
+  if (!priv->orig_background)
+    {
+      g_warning ("Could not load background image: %s",
+                 (err) ? err->message : "Unknown error");
+      g_clear_error (&err);
+    }
+
+  priv->orig_color_map = gdk_pixbuf_new_from_file (DATADIR "/cc.png",
+                                                   &err);
+  if (!priv->orig_color_map)
+    {
+      g_warning ("Could not load background image: %s",
+                 (err) ? err->message : "Unknown error");
+      g_clear_error (&err);
+    }
+
+  priv->tzdb = tz_load_db ();
+
+  g_signal_connect (self, "button-press-event", G_CALLBACK (button_press_event),
+                    NULL);
+}
+
+/**
+ * anaconda_timezone_map_set_timezone:
+ * @map: an #AnacondaTimezoneMap
+ * @timezone: timezone name
+ *
+ * Modifies the map to show @timezone as selected. Also modifies the internal
+ * data of the @map.
+ *
+ * Returns: (transfer none): Whether the change was successfully completed.
+ */
+gboolean
+anaconda_timezone_map_set_timezone (AnacondaTimezoneMap *map,
+                              const gchar   *timezone)
+{
+  GPtrArray *locations;
+  guint i;
+  char *real_tz;
+  gboolean ret;
+
+  real_tz = tz_info_get_clean_name (map->priv->tzdb, timezone);
+
+  locations = tz_get_locations (map->priv->tzdb);
+  ret = FALSE;
+
+  for (i = 0; i < locations->len; i++)
+    {
+      TzLocation *loc = locations->pdata[i];
+
+      if (!g_strcmp0 (loc->zone, real_tz ? real_tz : timezone))
+        {
+          set_location (map, loc);
+          ret = TRUE;
+          break;
+        }
+    }
+
+  if (ret)
+    gtk_widget_queue_draw (GTK_WIDGET (map));
+
+  g_free (real_tz);
+
+  return ret;
+}
+
+/**
+ * anaconda_timezone_map_get_timezone:
+ * @map: an #AnacondaTimezoneMap
+ *
+ * Returns: (transfer none): the selected timezone
+ */
+gchar *
+anaconda_timezone_map_get_timezone (AnacondaTimezoneMap *map)
+{
+    return map->priv->location->zone;
+}
diff --git a/widgets/src/TimezoneMap.h b/widgets/src/TimezoneMap.h
new file mode 100644
index 0000000..aa74803
--- /dev/null
+++ b/widgets/src/TimezoneMap.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2012 Red Hat, Inc
+ *
+ * Heavily based on the gnome-control-center code,
+ * Copyright (c) 2010 Intel, Inc
+ * Written by Thomas Wood <thomas wood intel com>
+ *
+ * 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: Vratislav Podzimek <vpodzime redhat com>
+ *
+ */
+
+#ifndef DATADIR
+#define DATADIR "/usr/share/anaconda/tzmapdata/"
+#endif
+
+#ifndef _ANACONDA_TIMEZONE_MAP_H
+#define _ANACONDA_TIMEZONE_MAP_H
+
+#include <gtk/gtk.h>
+#include "tz.h"
+
+G_BEGIN_DECLS
+
+#define ANACONDA_TYPE_TIMEZONE_MAP anaconda_timezone_map_get_type()
+
+#define ANACONDA_TIMEZONE_MAP(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), \
+  ANACONDA_TYPE_TIMEZONE_MAP, AnacondaTimezoneMap))
+
+#define ANACONDA_TIMEZONE_MAP_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), \
+  ANACONDA_TYPE_TIMEZONE_MAP, AnacondaTimezoneMapClass))
+
+#define ANACONDA_IS_TIMEZONE_MAP(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
+  ANACONDA_TYPE_TIMEZONE_MAP))
+
+#define ANACONDA_IS_TIMEZONE_MAP_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), \
+  ANACONDA_TYPE_TIMEZONE_MAP))
+
+#define ANACONDA_TIMEZONE_MAP_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS ((obj), \
+  ANACONDA_TYPE_TIMEZONE_MAP, AnacondaTimezoneMapClass))
+
+typedef struct _AnacondaTimezoneMap AnacondaTimezoneMap;
+typedef struct _AnacondaTimezoneMapClass AnacondaTimezoneMapClass;
+typedef struct _AnacondaTimezoneMapPrivate AnacondaTimezoneMapPrivate;
+
+struct _AnacondaTimezoneMap
+{
+  GtkWidget parent;
+
+  AnacondaTimezoneMapPrivate *priv;
+};
+
+struct _AnacondaTimezoneMapClass
+{
+  GtkWidgetClass parent_class;
+};
+
+GType anaconda_timezone_map_get_type (void) G_GNUC_CONST;
+
+GtkWidget *anaconda_timezone_map_new (void);
+
+gboolean anaconda_timezone_map_set_timezone (AnacondaTimezoneMap *map,
+                                       const gchar   *timezone);
+
+gchar *anaconda_timezone_map_get_timezone (AnacondaTimezoneMap *map);
+
+G_END_DECLS
+
+#endif /* _ANACONDA_TIMEZONE_MAP_H */
diff --git a/widgets/src/tz.c b/widgets/src/tz.c
new file mode 100644
index 0000000..e650c22
--- /dev/null
+++ b/widgets/src/tz.c
@@ -0,0 +1,482 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* Generic timezone utilities.
+ *
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ *
+ * Authors: Hans Petter Jansson <hpj ximian com>
+ * 
+ * Largely based on Michael Fulbright's work on Anaconda.
+ *
+ * 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.
+ */
+
+
+#include <glib.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <math.h>
+#include <string.h>
+#include "tz.h"
+
+
+/* Forward declarations for private functions */
+
+static float convert_pos (gchar *pos, int digits);
+static int compare_country_names (const void *a, const void *b);
+static void sort_locations_by_country (GPtrArray *locations);
+static gchar * tz_data_file_get (void);
+static void load_backward_tz (TzDB *tz_db);
+
+/* ---------------- *
+ * Public interface *
+ * ---------------- */
+TzDB *
+tz_load_db (void)
+{
+	gchar *tz_data_file;
+	TzDB *tz_db;
+	FILE *tzfile;
+	char buf[4096];
+
+	tz_data_file = tz_data_file_get ();
+	if (!tz_data_file) {
+		g_warning ("Could not get the TimeZone data file name");
+		return NULL;
+	}
+	tzfile = fopen (tz_data_file, "r");
+	if (!tzfile) {
+		g_warning ("Could not open *%s*\n", tz_data_file);
+		g_free (tz_data_file);
+		return NULL;
+	}
+
+	tz_db = g_new0 (TzDB, 1);
+	tz_db->locations = g_ptr_array_new ();
+
+	while (fgets (buf, sizeof(buf), tzfile))
+	{
+		gchar **tmpstrarr;
+		gchar *latstr, *lngstr, *p;
+		TzLocation *loc;
+
+		if (*buf == '#') continue;
+
+		g_strchomp(buf);
+		tmpstrarr = g_strsplit(buf,"\t", 6);
+		
+		latstr = g_strdup (tmpstrarr[1]);
+		p = latstr + 1;
+		while (*p != '-' && *p != '+') p++;
+		lngstr = g_strdup (p);
+		*p = '\0';
+		
+		loc = g_new0 (TzLocation, 1);
+		loc->country = g_strdup (tmpstrarr[0]);
+		loc->zone = g_strdup (tmpstrarr[2]);
+		loc->latitude  = convert_pos (latstr, 2);
+		loc->longitude = convert_pos (lngstr, 3);
+		
+#ifdef __sun
+		if (tmpstrarr[3] && *tmpstrarr[3] == '-' && tmpstrarr[4])
+			loc->comment = g_strdup (tmpstrarr[4]);
+
+		if (tmpstrarr[3] && *tmpstrarr[3] != '-' && !islower(loc->zone)) {
+			TzLocation *locgrp;
+
+			/* duplicate entry */
+			locgrp = g_new0 (TzLocation, 1);
+			locgrp->country = g_strdup (tmpstrarr[0]);
+			locgrp->zone = g_strdup (tmpstrarr[3]);
+			locgrp->latitude  = convert_pos (latstr, 2);
+			locgrp->longitude = convert_pos (lngstr, 3);
+			locgrp->comment = (tmpstrarr[4]) ? g_strdup (tmpstrarr[4]) : NULL;
+
+			g_ptr_array_add (tz_db->locations, (gpointer) locgrp);
+		}
+#else
+		loc->comment = (tmpstrarr[3]) ? g_strdup(tmpstrarr[3]) : NULL;
+#endif
+
+		g_ptr_array_add (tz_db->locations, (gpointer) loc);
+
+		g_free (latstr);
+		g_free (lngstr);
+		g_strfreev (tmpstrarr);
+	}
+	
+	fclose (tzfile);
+	
+	/* now sort by country */
+	sort_locations_by_country (tz_db->locations);
+	
+	g_free (tz_data_file);
+
+	/* Load up the hashtable of backward links */
+	load_backward_tz (tz_db);
+
+	return tz_db;
+}
+
+static void
+tz_location_free (TzLocation *loc)
+{
+	g_free (loc->country);
+	g_free (loc->zone);
+	g_free (loc->comment);
+
+	g_free (loc);
+}
+
+void
+tz_db_free (TzDB *db)
+{
+	g_ptr_array_foreach (db->locations, (GFunc) tz_location_free, NULL);
+	g_ptr_array_free (db->locations, TRUE);
+	g_hash_table_destroy (db->backward);
+	g_free (db);
+}
+
+GPtrArray *
+tz_get_locations (TzDB *db)
+{
+	return db->locations;
+}
+
+
+gchar *
+tz_location_get_country (TzLocation *loc)
+{
+	return loc->country;
+}
+
+
+gchar *
+tz_location_get_zone (TzLocation *loc)
+{
+	return loc->zone;
+}
+
+
+gchar *
+tz_location_get_comment (TzLocation *loc)
+{
+	return loc->comment;
+}
+
+
+void
+tz_location_get_position (TzLocation *loc, double *longitude, double *latitude)
+{
+	*longitude = loc->longitude;
+	*latitude = loc->latitude;
+}
+
+glong
+tz_location_get_utc_offset (TzLocation *loc)
+{
+	TzInfo *tz_info;
+	glong offset;
+
+	tz_info = tz_info_from_location (loc);
+	offset = tz_info->utc_offset;
+	tz_info_free (tz_info);
+	return offset;
+}
+
+TzInfo *
+tz_info_from_location (TzLocation *loc)
+{
+	TzInfo *tzinfo;
+	time_t curtime;
+	struct tm *curzone;
+	gchar *tz_env_value;
+	
+	g_return_val_if_fail (loc != NULL, NULL);
+	g_return_val_if_fail (loc->zone != NULL, NULL);
+	
+	tz_env_value = g_strdup (getenv ("TZ"));
+	setenv ("TZ", loc->zone, 1);
+	
+#if 0
+	tzset ();
+#endif
+	tzinfo = g_new0 (TzInfo, 1);
+
+	curtime = time (NULL);
+	curzone = localtime (&curtime);
+
+#ifndef __sun
+	/* Currently this solution doesnt seem to work - I get that */
+	/* America/Phoenix uses daylight savings, which is wrong    */
+	tzinfo->tzname_normal = g_strdup (curzone->tm_zone);
+	if (curzone->tm_isdst) 
+		tzinfo->tzname_daylight =
+			g_strdup (&curzone->tm_zone[curzone->tm_isdst]);
+	else
+		tzinfo->tzname_daylight = NULL;
+
+	tzinfo->utc_offset = curzone->tm_gmtoff;
+#else
+	tzinfo->tzname_normal = NULL;
+	tzinfo->tzname_daylight = NULL;
+	tzinfo->utc_offset = 0;
+#endif
+
+	tzinfo->daylight = curzone->tm_isdst;
+
+	if (tz_env_value)
+		setenv ("TZ", tz_env_value, 1);
+	else
+		unsetenv ("TZ");
+
+	g_free (tz_env_value);
+	
+	return tzinfo;
+}
+
+
+void
+tz_info_free (TzInfo *tzinfo)
+{
+	g_return_if_fail (tzinfo != NULL);
+	
+	if (tzinfo->tzname_normal) g_free (tzinfo->tzname_normal);
+	if (tzinfo->tzname_daylight) g_free (tzinfo->tzname_daylight);
+	g_free (tzinfo);
+}
+
+struct {
+	const char *orig;
+	const char *dest;
+} aliases[] = {
+	{ "Asia/Istanbul",  "Europe/Istanbul" },	/* Istanbul is in both Europe and Asia */
+	{ "Europe/Nicosia", "Asia/Nicosia" },		/* Ditto */
+	{ "EET",            "Europe/Istanbul" },	/* Same tz as the 2 above */
+	{ "HST",            "Pacific/Honolulu" },
+	{ "WET",            "Europe/Brussels" },	/* Other name for the mainland Europe tz */
+	{ "CET",            "Europe/Brussels" },	/* ditto */
+	{ "MET",            "Europe/Brussels" },
+	{ "Etc/Zulu",       "Etc/GMT" },
+	{ "Etc/UTC",        "Etc/GMT" },
+	{ "GMT",            "Etc/GMT" },
+	{ "Greenwich",      "Etc/GMT" },
+	{ "Etc/UCT",        "Etc/GMT" },
+	{ "Etc/GMT0",       "Etc/GMT" },
+	{ "Etc/GMT+0",      "Etc/GMT" },
+	{ "Etc/GMT-0",      "Etc/GMT" },
+	{ "Etc/Universal",  "Etc/GMT" },
+	{ "PST8PDT",        "America/Los_Angeles" },	/* Other name for the Atlantic tz */
+	{ "EST",            "America/New_York" },	/* Other name for the Eastern tz */
+	{ "EST5EDT",        "America/New_York" },	/* ditto */
+	{ "CST6CDT",        "America/Chicago" },	/* Other name for the Central tz */
+	{ "MST",            "America/Denver" },		/* Other name for the mountain tz */
+	{ "MST7MDT",        "America/Denver" },		/* ditto */
+};
+
+static gboolean
+compare_timezones (const char *a,
+		   const char *b)
+{
+	if (g_str_equal (a, b))
+		return TRUE;
+	if (strchr (b, '/') == NULL) {
+		char *prefixed;
+
+		prefixed = g_strdup_printf ("/%s", b);
+		if (g_str_has_suffix (a, prefixed)) {
+			g_free (prefixed);
+			return TRUE;
+		}
+		g_free (prefixed);
+	}
+
+	return FALSE;
+}
+
+char *
+tz_info_get_clean_name (TzDB *tz_db,
+			const char *tz)
+{
+	char *ret;
+	const char *timezone;
+	guint i;
+	gboolean replaced;
+
+	/* Remove useless prefixes */
+	if (g_str_has_prefix (tz, "right/"))
+		tz = tz + strlen ("right/");
+	else if (g_str_has_prefix (tz, "posix/"))
+		tz = tz + strlen ("posix/");
+
+	/* Here start the crazies */
+	replaced = FALSE;
+
+	for (i = 0; i < G_N_ELEMENTS (aliases); i++) {
+		if (compare_timezones (tz, aliases[i].orig)) {
+			replaced = TRUE;
+			timezone = aliases[i].dest;
+			break;
+		}
+	}
+
+	/* Try again! */
+	if (!replaced) {
+		/* Ignore crazy solar times from the '80s */
+		if (g_str_has_prefix (tz, "Asia/Riyadh") ||
+		    g_str_has_prefix (tz, "Mideast/Riyadh")) {
+			timezone = "Asia/Riyadh";
+			replaced = TRUE;
+		}
+	}
+
+	if (!replaced)
+		timezone = tz;
+
+	ret = g_hash_table_lookup (tz_db->backward, timezone);
+	if (ret == NULL)
+		return g_strdup (timezone);
+	return g_strdup (ret);
+}
+
+/* ----------------- *
+ * Private functions *
+ * ----------------- */
+
+static gchar *
+tz_data_file_get (void)
+{
+	gchar *file;
+
+	file = g_strdup (TZ_DATA_FILE);
+
+	return file;
+}
+
+static float
+convert_pos (gchar *pos, int digits)
+{
+	gchar whole[10];
+	gchar *fraction;
+	gint i;
+	float t1, t2;
+	
+	if (!pos || strlen(pos) < 4 || digits > 9) return 0.0;
+	
+	for (i = 0; i < digits + 1; i++) whole[i] = pos[i];
+	whole[i] = '\0';
+	fraction = pos + digits + 1;
+
+	t1 = g_strtod (whole, NULL);
+	t2 = g_strtod (fraction, NULL);
+
+	if (t1 >= 0.0) return t1 + t2/pow (10.0, strlen(fraction));
+	else return t1 - t2/pow (10.0, strlen(fraction));
+}
+
+
+#if 0
+
+/* Currently not working */
+static void
+free_tzdata (TzLocation *tz)
+{
+	
+	if (tz->country)
+	  g_free(tz->country);
+	if (tz->zone)
+	  g_free(tz->zone);
+	if (tz->comment)
+	  g_free(tz->comment);
+	
+	g_free(tz);
+}
+#endif
+
+
+static int
+compare_country_names (const void *a, const void *b)
+{
+	const TzLocation *tza = * (TzLocation **) a;
+	const TzLocation *tzb = * (TzLocation **) b;
+	
+	return strcmp (tza->zone, tzb->zone);
+}
+
+
+static void
+sort_locations_by_country (GPtrArray *locations)
+{
+	qsort (locations->pdata, locations->len, sizeof (gpointer),
+	       compare_country_names);
+}
+
+static void
+load_backward_tz (TzDB *tz_db)
+{
+  GError *error = NULL;
+  char **lines, *contents;
+  guint i;
+
+  tz_db->backward = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
+
+  if (g_file_get_contents (BACKWARDDIR "timezones_backward", &contents, NULL, &error) == FALSE)
+    {
+      g_warning ("Failed to load 'backward' file: %s", error->message);
+      return;
+    }
+  lines = g_strsplit (contents, "\n", -1);
+  g_free (contents);
+  for (i = 0; lines[i] != NULL; i++)
+    {
+      char **items;
+      guint j;
+      char *real, *alias;
+
+      if (g_ascii_strncasecmp (lines[i], "Link\t", 5) != 0)
+        continue;
+
+      items = g_strsplit (lines[i], "\t", -1);
+      real = NULL;
+      alias = NULL;
+      /* Skip the "Link<tab>" part */
+      for (j = 1; items[j] != NULL; j++)
+        {
+          if (items[j][0] == '\0')
+            continue;
+          if (real == NULL)
+            {
+              real = items[j];
+              continue;
+            }
+          alias = items[j];
+          break;
+        }
+
+      if (real == NULL || alias == NULL)
+        g_warning ("Could not parse line: %s", lines[i]);
+
+      /* We don't need more than one name for it */
+      if (g_str_equal (real, "Etc/UTC") ||
+          g_str_equal (real, "Etc/UCT"))
+        real = "Etc/GMT";
+
+      g_hash_table_insert (tz_db->backward, g_strdup (alias), g_strdup (real));
+      g_strfreev (items);
+    }
+  g_strfreev (lines);
+}
+
diff --git a/widgets/src/tz.h b/widgets/src/tz.h
new file mode 100644
index 0000000..ac0a49b
--- /dev/null
+++ b/widgets/src/tz.h
@@ -0,0 +1,92 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* Generic timezone utilities.
+ *
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ *
+ * Authors: Hans Petter Jansson <hpj ximian com>
+ * 
+ * Largely based on Michael Fulbright's work on Anaconda.
+ *
+ * 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.
+ */
+
+#ifndef BACKWARDDIR
+#define BACKWARDDIR "/usr/share/anaconda/tzmapdata/"
+#endif
+
+#ifndef _E_TZ_H
+#define _E_TZ_H
+
+#include <glib.h>
+
+#ifndef __sun
+#  define TZ_DATA_FILE "/usr/share/zoneinfo/zone.tab"
+#else
+#  define TZ_DATA_FILE "/usr/share/lib/zoneinfo/tab/zone_sun.tab"
+#endif
+
+typedef struct _TzDB TzDB;
+typedef struct _TzLocation TzLocation;
+typedef struct _TzInfo TzInfo;
+
+
+struct _TzDB
+{
+	GPtrArray  *locations;
+	GHashTable *backward;
+};
+
+struct _TzLocation
+{
+	gchar *country;
+	gdouble latitude;
+	gdouble longitude;
+	gchar *zone;
+	gchar *comment;
+
+	gdouble dist; /* distance to clicked point for comparison */
+};
+
+/* see the glibc info page information on time zone information */
+/*  tzname_normal    is the default name for the timezone */
+/*  tzname_daylight  is the name of the zone when in daylight savings */
+/*  utc_offset       is offset in seconds from utc */
+/*  daylight         if non-zero then location obeys daylight savings */
+
+struct _TzInfo
+{
+	gchar *tzname_normal;
+	gchar *tzname_daylight;
+	glong utc_offset;
+	gint daylight;
+};
+
+
+TzDB      *tz_load_db                 (void);
+void       tz_db_free                 (TzDB *db);
+char *     tz_info_get_clean_name     (TzDB *tz_db,
+				       const char *tz);
+GPtrArray *tz_get_locations           (TzDB *db);
+void       tz_location_get_position   (TzLocation *loc,
+				       double *longitude, double *latitude);
+char      *tz_location_get_country    (TzLocation *loc);
+gchar     *tz_location_get_zone       (TzLocation *loc);
+gchar     *tz_location_get_comment    (TzLocation *loc);
+glong      tz_location_get_utc_offset (TzLocation *loc);
+gint       tz_location_set_locally    (TzLocation *loc);
+TzInfo    *tz_info_from_location      (TzLocation *loc);
+void       tz_info_free               (TzInfo *tz_info);
+
+#endif
-- 
1.7.4.4


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