datetime: add detection of location from map clicks
This commit is contained in:
Thomas Wood
parent
1d60affa61
commit
26ae0134cf
6 changed files with 587 additions and 8 deletions
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@ -61,7 +61,8 @@ libdate_time_la_SOURCES = \
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cc-timezone-map.c \
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cc-timezone-map.h \
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set-timezone.c \
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set-timezone.h
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set-timezone.h \
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tz.c tz.h
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libdate_time_la_LIBADD = $(PANEL_LIBS)
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libdate_time_la_LDFLAGS = $(PANEL_LDFLAGS)
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@ -178,6 +178,18 @@ apply_button_clicked_cb (GtkButton *button,
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}
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static void
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location_changed_cb (CcTimezoneMap *map,
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TzLocation *location,
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CcDateTimePanel *self)
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{
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GtkWidget *label;
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label = (GtkWidget *) gtk_builder_get_object (self->priv->builder,
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"label_current_location");
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gtk_label_set_text (GTK_LABEL (label), location->zone);
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}
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static void
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cc_date_time_panel_init (CcDateTimePanel *self)
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{
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@ -205,6 +217,8 @@ cc_date_time_panel_init (CcDateTimePanel *self)
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}
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widget = (GtkWidget *) cc_timezone_map_new ();
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g_signal_connect (widget, "location-changed",
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G_CALLBACK (location_changed_cb), self);
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gtk_widget_show (widget);
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gtk_container_add (GTK_CONTAINER (gtk_builder_get_object (priv->builder,
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@ -23,6 +23,8 @@
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*/
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#include "cc-timezone-map.h"
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#include <math.h>
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#include "tz.h"
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G_DEFINE_TYPE (CcTimezoneMap, cc_timezone_map, GTK_TYPE_WIDGET)
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@ -51,8 +53,19 @@ struct _CcTimezoneMapPrivate
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gint visible_map_rowstride;
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gdouble selected_offset;
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TzDB *tzdb;
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TzLocation *location;
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};
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enum
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{
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LOCATION_CHANGED,
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LAST_SIGNAL
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};
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static guint signals[LAST_SIGNAL];
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static CcTimezoneMapOffset color_codes[] =
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{
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@ -162,6 +175,15 @@ cc_timezone_map_dispose (GObject *object)
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static void
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cc_timezone_map_finalize (GObject *object)
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{
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CcTimezoneMapPrivate *priv = CC_TIMEZONE_MAP (object)->priv;
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if (priv->tzdb)
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{
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g_free (priv->tzdb);
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priv->tzdb = NULL;
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}
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G_OBJECT_CLASS (cc_timezone_map_parent_class)->finalize (object);
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}
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@ -237,6 +259,44 @@ cc_timezone_map_realize (GtkWidget *widget)
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gtk_widget_set_window (widget, window);
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}
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static gdouble
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convert_longtitude_to_x (gdouble longitude, gint map_width)
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{
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const gdouble xdeg_offset = -6;
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gdouble x;
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x = (map_width * (180.0 + longitude) / 360.0)
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+ (map_width * xdeg_offset / 180.0);
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return x;
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}
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static gdouble
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radians (gdouble degrees)
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{
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return (degrees / 360.0) * G_PI * 2;
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}
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static gdouble
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convert_latitude_to_y (gdouble latitude, gdouble map_height)
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{
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gdouble bottom_lat = -59;
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gdouble top_lat = 81;
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gdouble top_per, y, full_range, top_offset, map_range;
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top_per = top_lat / 180.0;
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y = 1.25 * log (tan (G_PI_4 + 0.4 * radians (latitude)));
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full_range = 4.6068250867599998;
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top_offset = full_range * top_per;
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map_range = fabs (1.25 * log (tan (G_PI_4 + 0.4 * radians (bottom_lat))) - top_offset);
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y = fabs (y - top_offset);
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y = y / map_range;
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y = y * map_height;
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return y;
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}
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static gboolean
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cc_timezone_map_expose_event (GtkWidget *widget,
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GdkEventExpose *event)
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@ -247,6 +307,7 @@ cc_timezone_map_expose_event (GtkWidget *widget,
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GtkAllocation alloc;
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gchar *file;
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GError *err = NULL;
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gdouble pointx, pointy;
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cr = gdk_cairo_create (gtk_widget_get_window (widget));
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@ -267,17 +328,30 @@ cc_timezone_map_expose_event (GtkWidget *widget,
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if (err)
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g_clear_error (&err);
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}
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else
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{
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hilight = gdk_pixbuf_scale_simple (orig_hilight, alloc.width, alloc.height,
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GDK_INTERP_BILINEAR);
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gdk_cairo_set_source_pixbuf (cr, hilight, 0, 0);
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hilight = gdk_pixbuf_scale_simple (orig_hilight, alloc.width,
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alloc.height, GDK_INTERP_BILINEAR);
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gdk_cairo_set_source_pixbuf (cr, hilight, 0, 0);
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cairo_paint (cr);
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cairo_paint (cr);
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g_object_unref (hilight);
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g_object_unref (orig_hilight);
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}
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if (priv->location)
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{
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pointx = convert_longtitude_to_x (priv->location->longitude, alloc.width);
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pointy = convert_latitude_to_y (priv->location->latitude, alloc.height);
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_arc (cr, pointx, pointy, 3.0, 0, 2 * G_PI);
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cairo_fill (cr);
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}
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cairo_destroy (cr);
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g_object_unref (hilight);
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g_object_unref (orig_hilight);
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return TRUE;
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}
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@ -300,9 +374,33 @@ cc_timezone_map_class_init (CcTimezoneMapClass *klass)
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widget_class->size_allocate = cc_timezone_map_size_allocate;
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widget_class->realize = cc_timezone_map_realize;
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widget_class->expose_event = cc_timezone_map_expose_event;
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signals[LOCATION_CHANGED] = g_signal_new ("location-changed",
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CC_TYPE_TIMEZONE_MAP,
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G_SIGNAL_RUN_FIRST,
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0,
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NULL,
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NULL,
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g_cclosure_marshal_VOID__POINTER,
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G_TYPE_NONE, 1,
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G_TYPE_POINTER);
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}
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gboolean
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static gint
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sort_locations (TzLocation *a,
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TzLocation *b)
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{
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if (a->dist > b->dist)
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return 1;
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if (a->dist < b->dist)
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return -1;
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return 0;
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}
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static gboolean
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button_press_event (GtkWidget *widget,
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GdkEventButton *event)
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{
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@ -313,6 +411,12 @@ button_press_event (GtkWidget *widget,
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gint rowstride;
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gint i;
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const GPtrArray *array;
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gint width, height;
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GList *distances = NULL;
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GtkAllocation alloc;
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TzInfo *info;
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x = event->x;
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y = event->y;
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@ -337,6 +441,44 @@ button_press_event (GtkWidget *widget,
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gtk_widget_queue_draw (widget);
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/* work out the co-ordinates */
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array = tz_get_locations (priv->tzdb);
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gtk_widget_get_allocation (widget, &alloc);
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width = alloc.width;
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height = alloc.height;
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for (i = 0; i < array->len; i++)
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{
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gdouble pointx, pointy, dx, dy;
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TzLocation *loc = array->pdata[i];
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pointx = convert_longtitude_to_x (loc->longitude, width);
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pointy = convert_latitude_to_y (loc->latitude, height);
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dx = pointx - x;
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dy = pointy - y;
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loc->dist = dx * dx + dy * dy;
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distances = g_list_prepend (distances, loc);
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}
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distances = g_list_sort (distances, (GCompareFunc) sort_locations);
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priv->location = (TzLocation*) distances->data;
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g_list_free (distances);
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info = tz_info_from_location (priv->location);
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priv->selected_offset = tz_location_get_utc_offset (priv->location)
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/ (60.0*60.0) + ((info->daylight) ? -1.0 : 0.0);
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g_signal_emit (widget, signals[LOCATION_CHANGED], 0, priv->location);
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tz_info_free (info);
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return TRUE;
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}
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@ -367,6 +509,7 @@ cc_timezone_map_init (CcTimezoneMap *self)
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g_clear_error (&err);
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}
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priv->tzdb = tz_load_db ();
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g_signal_connect (self, "button-press-event", G_CALLBACK (button_press_event),
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NULL);
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@ -24,6 +24,7 @@
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#define _CC_TIMEZONE_MAP_H
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#include <gtk/gtk.h>
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#include "tz.h"
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G_BEGIN_DECLS
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336
panels/datetime/tz.c
Normal file
336
panels/datetime/tz.c
Normal file
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@ -0,0 +1,336 @@
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
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/* Generic timezone utilities.
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*
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* Copyright (C) 2000-2001 Ximian, Inc.
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*
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* Authors: Hans Petter Jansson <hpj@ximian.com>
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*
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* Largely based on Michael Fulbright's work on Anaconda.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <glib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include <math.h>
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#include <string.h>
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#include "tz.h"
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/* Forward declarations for private functions */
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static float convert_pos (gchar *pos, int digits);
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static int compare_country_names (const void *a, const void *b);
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static void sort_locations_by_country (GPtrArray *locations);
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static gchar * tz_data_file_get (void);
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/* ---------------- *
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* Public interface *
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* ---------------- */
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TzDB *
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tz_load_db (void)
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{
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gchar *tz_data_file;
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TzDB *tz_db;
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FILE *tzfile;
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char buf[4096];
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tz_data_file = tz_data_file_get ();
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if (!tz_data_file) {
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g_warning ("Could not get the TimeZone data file name");
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return NULL;
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}
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tzfile = fopen (tz_data_file, "r");
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if (!tzfile) {
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g_warning ("Could not open *%s*\n", tz_data_file);
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g_free (tz_data_file);
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return NULL;
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}
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tz_db = g_new0 (TzDB, 1);
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tz_db->locations = g_ptr_array_new ();
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while (fgets (buf, sizeof(buf), tzfile))
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{
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gchar **tmpstrarr;
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gchar *latstr, *lngstr, *p;
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TzLocation *loc;
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if (*buf == '#') continue;
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g_strchomp(buf);
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tmpstrarr = g_strsplit(buf,"\t", 6);
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latstr = g_strdup (tmpstrarr[1]);
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p = latstr + 1;
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while (*p != '-' && *p != '+') p++;
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lngstr = g_strdup (p);
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*p = '\0';
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loc = g_new0 (TzLocation, 1);
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loc->country = g_strdup (tmpstrarr[0]);
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loc->zone = g_strdup (tmpstrarr[2]);
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loc->latitude = convert_pos (latstr, 2);
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loc->longitude = convert_pos (lngstr, 3);
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#ifdef __sun
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if (tmpstrarr[3] && *tmpstrarr[3] == '-' && tmpstrarr[4])
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loc->comment = g_strdup (tmpstrarr[4]);
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if (tmpstrarr[3] && *tmpstrarr[3] != '-' && !islower(loc->zone)) {
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TzLocation *locgrp;
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/* duplicate entry */
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locgrp = g_new0 (TzLocation, 1);
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locgrp->country = g_strdup (tmpstrarr[0]);
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locgrp->zone = g_strdup (tmpstrarr[3]);
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locgrp->latitude = convert_pos (latstr, 2);
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locgrp->longitude = convert_pos (lngstr, 3);
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locgrp->comment = (tmpstrarr[4]) ? g_strdup (tmpstrarr[4]) : NULL;
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g_ptr_array_add (tz_db->locations, (gpointer) locgrp);
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}
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#else
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loc->comment = (tmpstrarr[3]) ? g_strdup(tmpstrarr[3]) : NULL;
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#endif
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g_ptr_array_add (tz_db->locations, (gpointer) loc);
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g_free (latstr);
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g_free (lngstr);
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g_strfreev (tmpstrarr);
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}
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fclose (tzfile);
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/* now sort by country */
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sort_locations_by_country (tz_db->locations);
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g_free (tz_data_file);
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return tz_db;
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}
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GPtrArray *
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tz_get_locations (TzDB *db)
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{
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return db->locations;
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}
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gchar *
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tz_location_get_country (TzLocation *loc)
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{
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return loc->country;
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}
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gchar *
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tz_location_get_zone (TzLocation *loc)
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{
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return loc->zone;
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}
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gchar *
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tz_location_get_comment (TzLocation *loc)
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{
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return loc->comment;
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}
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void
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tz_location_get_position (TzLocation *loc, double *longitude, double *latitude)
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{
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*longitude = loc->longitude;
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*latitude = loc->latitude;
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}
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glong
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tz_location_get_utc_offset (TzLocation *loc)
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{
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TzInfo *tz_info;
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glong offset;
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tz_info = tz_info_from_location (loc);
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offset = tz_info->utc_offset;
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tz_info_free (tz_info);
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return offset;
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}
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gint
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tz_location_set_locally (TzLocation *loc)
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{
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gchar *str;
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time_t curtime;
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struct tm *curzone;
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gboolean is_dst = FALSE;
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gint correction = 0;
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g_return_val_if_fail (loc != NULL, 0);
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g_return_val_if_fail (loc->zone != NULL, 0);
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curtime = time (NULL);
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curzone = localtime (&curtime);
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is_dst = curzone->tm_isdst;
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str = g_strdup_printf ("TZ=%s", loc->zone);
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putenv (str);
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#if 0
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curtime = time (NULL);
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curzone = localtime (&curtime);
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if (!is_dst && curzone->tm_isdst) {
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correction = (60 * 60);
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}
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else if (is_dst && !curzone->tm_isdst) {
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correction = 0;
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}
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#endif
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return correction;
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}
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TzInfo *
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tz_info_from_location (TzLocation *loc)
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{
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TzInfo *tzinfo;
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gchar *str;
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||||
time_t curtime;
|
||||
struct tm *curzone;
|
||||
|
||||
g_return_val_if_fail (loc != NULL, NULL);
|
||||
g_return_val_if_fail (loc->zone != NULL, NULL);
|
||||
|
||||
str = g_strdup_printf ("TZ=%s", loc->zone);
|
||||
putenv (str);
|
||||
|
||||
#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;
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
/* ----------------- *
|
||||
* 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);
|
||||
}
|
||||
84
panels/datetime/tz.h
Normal file
84
panels/datetime/tz.h
Normal file
|
|
@ -0,0 +1,84 @@
|
|||
/* -*- 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 _E_TZ_H
|
||||
#define _E_TZ_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;
|
||||
};
|
||||
|
||||
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);
|
||||
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
|
||||
Loading…
Add table
Add a link
Reference in a new issue