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Diffstat (limited to 'widgets/src/TimezoneMap.c')
-rw-r--r-- | widgets/src/TimezoneMap.c | 600 |
1 files changed, 600 insertions, 0 deletions
diff --git a/widgets/src/TimezoneMap.c b/widgets/src/TimezoneMap.c new file mode 100644 index 000000000..fb2ff5f70 --- /dev/null +++ b/widgets/src/TimezoneMap.c @@ -0,0 +1,600 @@ +/* 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 (TZMAP_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 (TZMAP_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 (TZMAP_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 (TZMAP_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; +} |