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-rw-r--r--libmap/cc-timezone-map.c711
1 files changed, 711 insertions, 0 deletions
diff --git a/libmap/cc-timezone-map.c b/libmap/cc-timezone-map.c
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--- /dev/null
+++ b/libmap/cc-timezone-map.c
@@ -0,0 +1,711 @@
+/*
+ * Copyright (C) 2010 Intel, Inc
+ *
+ * Portions from Ubiquity, Copyright (C) 2009 Canonical Ltd.
+ * Written by Evan Dandrea <evand@ubuntu.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: Thomas Wood <thomas.wood@intel.com>
+ *
+ */
+
+#include "cc-timezone-map.h"
+#include <math.h>
+#include "tz.h"
+
+G_DEFINE_TYPE (CcTimezoneMap, cc_timezone_map, GTK_TYPE_WIDGET)
+
+#define TIMEZONE_MAP_PRIVATE(o) \
+ (G_TYPE_INSTANCE_GET_PRIVATE ((o), CC_TYPE_TIMEZONE_MAP, CcTimezoneMapPrivate))
+
+
+typedef struct
+{
+ gdouble offset;
+ guchar red;
+ guchar green;
+ guchar blue;
+ guchar alpha;
+} CcTimezoneMapOffset;
+
+struct _CcTimezoneMapPrivate
+{
+ 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;
+ GHashTable *alias_db;
+};
+
+enum
+{
+ LOCATION_CHANGED,
+ LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL];
+
+
+static CcTimezoneMapOffset 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 }
+};
+
+
+static void
+cc_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
+cc_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
+cc_timezone_map_dispose (GObject *object)
+{
+ CcTimezoneMapPrivate *priv = CC_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;
+ }
+
+ if (priv->alias_db)
+ {
+ g_hash_table_destroy (priv->alias_db);
+ priv->alias_db = NULL;
+ }
+
+ G_OBJECT_CLASS (cc_timezone_map_parent_class)->dispose (object);
+}
+
+static void
+cc_timezone_map_finalize (GObject *object)
+{
+ CcTimezoneMapPrivate *priv = CC_TIMEZONE_MAP (object)->priv;
+
+ if (priv->tzdb)
+ {
+ tz_db_free (priv->tzdb);
+ priv->tzdb = NULL;
+ }
+
+
+ G_OBJECT_CLASS (cc_timezone_map_parent_class)->finalize (object);
+}
+
+/* GtkWidget functions */
+#ifdef CCGTK3
+static void
+cc_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
+cc_timezone_map_get_preferred_height (GtkWidget *widget,
+ gint *minimum,
+ gint *natural)
+{
+ CcTimezoneMapPrivate *priv = CC_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;
+}
+
+#else
+
+static void
+cc_timezone_map_size_request (GtkWidget *widget,
+ GtkRequisition *requisition)
+{
+ CcTimezoneMapPrivate *priv = CC_TIMEZONE_MAP (widget)->priv;
+
+ if (!requisition)
+ return;
+
+ /* The + 20 here is a slight tweak to make the map fill the
+ * panel better without causing horizontal growing
+ */
+ requisition->height = 300 * gdk_pixbuf_get_height (priv->orig_background) / gdk_pixbuf_get_width (priv->orig_background) + 20;
+ requisition->width = 300;
+}
+#endif
+
+static void
+cc_timezone_map_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation)
+{
+ CcTimezoneMapPrivate *priv = CC_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 (cc_timezone_map_parent_class)->size_allocate (widget,
+ allocation);
+}
+
+static void
+cc_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);
+
+ gtk_widget_set_style (widget,
+ gtk_style_attach (gtk_widget_get_style (widget),
+ window));
+
+ gdk_window_set_user_data (window, widget);
+
+ cursor = gdk_cursor_new (GDK_HAND2);
+ gdk_window_set_cursor (window, cursor);
+
+ 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
+cc_timezone_map_draw (GtkWidget *widget,
+ cairo_t *cr)
+{
+ CcTimezoneMapPrivate *priv = CC_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;
+}
+
+#ifndef CCGTK3
+static gboolean
+cc_timezone_map_expose_event (GtkWidget *widget,
+ GdkEventExpose *event)
+{
+ gboolean rv;
+ cairo_t *cr;
+ cr = gdk_cairo_create (widget->window);
+ rv = cc_timezone_map_draw (widget, cr);
+ cairo_destroy (cr);
+ return rv;
+}
+#endif
+
+
+static void
+cc_timezone_map_class_init (CcTimezoneMapClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+ g_type_class_add_private (klass, sizeof (CcTimezoneMapPrivate));
+
+ object_class->get_property = cc_timezone_map_get_property;
+ object_class->set_property = cc_timezone_map_set_property;
+ object_class->dispose = cc_timezone_map_dispose;
+ object_class->finalize = cc_timezone_map_finalize;
+
+#ifdef CCGTK3
+ widget_class->get_preferred_width = cc_timezone_map_get_preferred_width;
+ widget_class->get_preferred_height = cc_timezone_map_get_preferred_height;
+#else
+ widget_class->size_request = cc_timezone_map_size_request;
+#endif
+ widget_class->size_allocate = cc_timezone_map_size_allocate;
+ widget_class->realize = cc_timezone_map_realize;
+#ifdef CCGTK3
+ widget_class->draw = cc_timezone_map_draw;
+#else
+ widget_class->expose_event = cc_timezone_map_expose_event;
+#endif
+
+ signals[LOCATION_CHANGED] = g_signal_new ("location-changed",
+ CC_TYPE_TIMEZONE_MAP,
+ G_SIGNAL_RUN_FIRST,
+ 0,
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__POINTER,
+ G_TYPE_NONE, 1,
+ G_TYPE_POINTER);
+}
+
+
+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 (CcTimezoneMap *map,
+ TzLocation *location)
+{
+ CcTimezoneMapPrivate *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[LOCATION_CHANGED], 0, priv->location);
+
+ tz_info_free (info);
+}
+
+static gboolean
+button_press_event (GtkWidget *widget,
+ GdkEventButton *event)
+{
+ CcTimezoneMapPrivate *priv = CC_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 (CC_TIMEZONE_MAP (widget), (TzLocation*) distances->data);
+
+ g_list_free (distances);
+
+ return TRUE;
+}
+
+static void
+load_backward_tz (CcTimezoneMap *self)
+{
+ GError *error = NULL;
+ char **lines, *contents;
+ guint i;
+
+ self->priv->alias_db = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
+
+ if (g_file_get_contents (GNOMECC_DATA_DIR "/datetime/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]);
+
+ g_hash_table_insert (self->priv->alias_db, g_strdup (alias), g_strdup (real));
+ g_strfreev (items);
+ }
+ g_strfreev (lines);
+}
+
+static void
+cc_timezone_map_init (CcTimezoneMap *self)
+{
+ CcTimezoneMapPrivate *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);
+
+ load_backward_tz (self);
+}
+
+CcTimezoneMap *
+cc_timezone_map_new (void)
+{
+ return g_object_new (CC_TYPE_TIMEZONE_MAP, NULL);
+}
+
+void
+cc_timezone_map_set_timezone (CcTimezoneMap *map,
+ const gchar *timezone)
+{
+ GPtrArray *locations;
+ guint i;
+ char *real_tz;
+
+ real_tz = g_hash_table_lookup (map->priv->alias_db, timezone);
+
+ locations = tz_get_locations (map->priv->tzdb);
+
+ 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);
+ break;
+ }
+ }
+
+ gtk_widget_queue_draw (GTK_WIDGET (map));
+}
+
+TzLocation *
+cc_timezone_map_get_location (CcTimezoneMap *map)
+{
+ return map->priv->location;
+}
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