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mate-control-center/capplets/time-admin/src/time-map.c

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/*
* Copyright (C) 2010 Intel, Inc
* Copyright (C) 2010-2018 The GNOME Project
* Copyright (C) 2018, 2019 zhuyaliang https://github.com/zhuyaliang/
* Copyright (C) 2019-2021 MATE Developers
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*
* Author: Thomas Wood <thomas.wood@intel.com>
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "time-map.h"
#include <math.h>
#define PIN_HOT_POINT_X 8
#define PIN_HOT_POINT_Y 15
typedef struct
{
gdouble offset;
guchar red;
guchar green;
guchar blue;
guchar alpha;
}TimezoneMapOffset;
enum
{
LOCATION_CHANGED,
LAST_SIGNAL
};
G_DEFINE_TYPE (TimezoneMap, timezone_map, GTK_TYPE_WIDGET)
static guint signals[LAST_SIGNAL];
static TimezoneMapOffset 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_dispose (GObject *object)
{
TimezoneMap *self = TIMEZONEMAP (object);
g_clear_object (&self->orig_background);
g_clear_object (&self->orig_background_dim);
g_clear_object (&self->orig_color_map);
g_clear_object (&self->background);
g_clear_object (&self->pin);
g_clear_pointer (&self->bubble_text, g_free);
if (self->color_map)
{
g_clear_object (&self->color_map);
self->visible_map_pixels = NULL;
self->visible_map_rowstride = 0;
}
G_OBJECT_CLASS (timezone_map_parent_class)->dispose (object);
}
static void
timezone_map_finalize (GObject *object)
{
TimezoneMap *self = TIMEZONEMAP (object);
g_clear_pointer (&self->tzdb, TimeZoneDateBaseFree);
G_OBJECT_CLASS (timezone_map_parent_class)->finalize (object);
}
static void
cc_timezone_map_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
TimezoneMap *map = TIMEZONEMAP (widget);
gint size;
size = gdk_pixbuf_get_width (map->orig_background);
if (minimum != NULL)
*minimum = size;
if (natural != NULL)
*natural = size;
}
static void
cc_timezone_map_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
TimezoneMap *map = TIMEZONEMAP (widget);
gint size;
size = gdk_pixbuf_get_height (map->orig_background);
if (minimum != NULL)
*minimum = size;
if (natural != NULL)
*natural = size;
}
static void
cc_timezone_map_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
TimezoneMap *map = TIMEZONEMAP (widget);
GdkPixbuf *pixbuf;
if (map->background)
g_object_unref (map->background);
if (!gtk_widget_is_sensitive (widget))
pixbuf = map->orig_background_dim;
else
pixbuf = map->orig_background;
map->background = gdk_pixbuf_scale_simple (pixbuf,
allocation->width,
allocation->height,
GDK_INTERP_BILINEAR);
if (map->color_map)
g_object_unref (map->color_map);
map->color_map = gdk_pixbuf_scale_simple (map->orig_color_map,
allocation->width,
allocation->height,
GDK_INTERP_BILINEAR);
map->visible_map_pixels = gdk_pixbuf_get_pixels (map->color_map);
map->visible_map_rowstride = gdk_pixbuf_get_rowstride (map->color_map);
GTK_WIDGET_CLASS (timezone_map_parent_class)->size_allocate (widget,
allocation);
}
static void
cc_timezone_map_realize (GtkWidget *widget)
{
GdkWindowAttr attr = { 0, };
GtkAllocation allocation;
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);
gdk_window_set_user_data (window, widget);
gtk_widget_set_window (widget, window);
}
static gdouble
convert_longitude_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 void
draw_text_bubble (cairo_t *cr,
GtkWidget *widget,
gdouble pointx,
gdouble pointy)
{
static const double corner_radius = 9.0;
static const double margin_top = 12.0;
static const double margin_bottom = 12.0;
static const double margin_left = 24.0;
static const double margin_right = 24.0;
TimezoneMap *map = TIMEZONEMAP (widget);
GtkAllocation alloc;
PangoLayout *layout;
PangoRectangle text_rect;
double x;
double y;
double width;
double height;
if (!map->bubble_text)
return;
gtk_widget_get_allocation (widget, &alloc);
layout = gtk_widget_create_pango_layout (widget, NULL);
/* Layout the text */
pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
pango_layout_set_spacing (layout, 3);
pango_layout_set_markup (layout, map->bubble_text, -1);
pango_layout_get_pixel_extents (layout, NULL, &text_rect);
/* Calculate the bubble size based on the text layout size */
width = text_rect.width + margin_left + margin_right;
height = text_rect.height + margin_top + margin_bottom;
if (pointx < alloc.width / 2)
x = pointx + 25;
else
x = pointx - width - 25;
y = pointy - height / 2;
/* Make sure it fits in the visible area */
x = CLAMP (x, 0, alloc.width - width);
y = CLAMP (y, 0, alloc.height - height);
cairo_save (cr);
cairo_translate (cr, x, y);
/* Draw the bubble */
cairo_new_sub_path (cr);
cairo_arc (cr, width - corner_radius, corner_radius, corner_radius, radians (-90), radians (0));
cairo_arc (cr, width - corner_radius, height - corner_radius, corner_radius, radians (0), radians (90));
cairo_arc (cr, corner_radius, height - corner_radius, corner_radius, radians (90), radians (180));
cairo_arc (cr, corner_radius, corner_radius, corner_radius, radians (180), radians (270));
cairo_close_path (cr);
cairo_set_source_rgba (cr, 0.2, 0.2, 0.2, 0.7);
cairo_fill (cr);
/* And finally draw the text */
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_move_to (cr, margin_left, margin_top);
pango_cairo_show_layout (cr, layout);
g_object_unref (layout);
cairo_restore (cr);
}
static gboolean
cc_timezone_map_draw (GtkWidget *widget,
cairo_t *cr)
{
TimezoneMap *map = TIMEZONEMAP (widget);
g_autoptr(GdkPixbuf) orig_hilight = NULL;
GtkAllocation alloc;
g_autofree gchar *file = NULL;
g_autoptr(GError) err = NULL;
gdouble pointx, pointy;
char buf[16];
gtk_widget_get_allocation (widget, &alloc);
/* paint background */
gdk_cairo_set_source_pixbuf (cr, map->background, 0, 0);
cairo_paint (cr);
/* paint hilight */
if (gtk_widget_is_sensitive (widget))
{
file = g_strdup_printf (TIMPZONEDIR"timezone_%s.png",
g_ascii_formatd (buf, sizeof (buf),
"%g", map->selected_offset));
}
else
{
file = g_strdup_printf (TIMPZONEDIR"timezone_%s_dim.png",
g_ascii_formatd (buf, sizeof (buf),
"%g", map->selected_offset));
}
orig_hilight = gdk_pixbuf_new_from_file (file, &err);
if (!orig_hilight)
{
g_warning ("Could not load hilight: %s",
(err) ? err->message : "Unknown Error");
}
else
{
g_autoptr(GdkPixbuf) hilight = NULL;
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);
}
if (map->location)
{
pointx = convert_longitude_to_x (map->location->longitude, alloc.width);
pointy = convert_latitude_to_y (map->location->latitude, alloc.height);
pointx = CLAMP (floor (pointx), 0, alloc.width);
pointy = CLAMP (floor (pointy), 0, alloc.height);
draw_text_bubble (cr, widget, pointx, pointy);
if (map->pin)
{
gdk_cairo_set_source_pixbuf (cr, map->pin,
pointx - PIN_HOT_POINT_X,
pointy - PIN_HOT_POINT_Y);
cairo_paint (cr);
}
}
return TRUE;
}
static void
update_cursor (GtkWidget *widget)
{
GdkWindow *window;
g_autoptr(GdkCursor) cursor = NULL;
if (!gtk_widget_get_realized (widget))
return;
if (gtk_widget_is_sensitive (widget))
{
GdkDisplay *display;
display = gtk_widget_get_display (widget);
cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
}
window = gtk_widget_get_window (widget);
gdk_window_set_cursor (window, cursor);
}
static void
cc_timezone_map_state_flags_changed (GtkWidget *widget,
GtkStateFlags prev_state)
{
update_cursor (widget);
if (GTK_WIDGET_CLASS (timezone_map_parent_class)->state_flags_changed)
GTK_WIDGET_CLASS (timezone_map_parent_class)->state_flags_changed (widget, prev_state);
}
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 (TimezoneMap *map,
TzLocation *location)
{
g_autoptr(TzInfo) info = NULL;
map->location = location;
info = tz_info_from_location (map->location);
map->selected_offset = tz_location_get_utc_offset (map->location)
/ (60.0*60.0) +
((info->daylight) ? -1.0 : 0.0);
g_signal_emit (map, signals[LOCATION_CHANGED], 0, map->location,NULL);
}
static gboolean
button_press_event (TimezoneMap *map,
GdkEventButton *event)
{
gint x, y;
guchar r, g, b, a;
guchar *pixels;
gint rowstride;
guint i;
const GPtrArray *array;
gint width, height;
GList *distances = NULL;
GtkAllocation alloc;
x = event->x;
y = event->y;
rowstride = map->visible_map_rowstride;
pixels = map->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)
{
map->selected_offset = color_codes[i].offset;
}
}
gtk_widget_queue_draw (GTK_WIDGET (map));
/* work out the co-ordinates */
array = tz_get_locations (map->tzdb);
gtk_widget_get_allocation (GTK_WIDGET (map), &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_longitude_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 (map, (TzLocation*) distances->data);
g_list_free (distances);
return TRUE;
}
static void
timezone_map_class_init (TimezoneMapClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->dispose = cc_timezone_map_dispose;
object_class->finalize = timezone_map_finalize;
widget_class->get_preferred_width = cc_timezone_map_get_preferred_width;
widget_class->get_preferred_height = cc_timezone_map_get_preferred_height;
widget_class->size_allocate = cc_timezone_map_size_allocate;
widget_class->realize = cc_timezone_map_realize;
widget_class->draw = cc_timezone_map_draw;
widget_class->state_flags_changed = cc_timezone_map_state_flags_changed;
signals[LOCATION_CHANGED] = g_signal_new ("location-changed",
TYPE_TIMEZONE_MAP,
G_SIGNAL_RUN_FIRST,
0,
NULL,
NULL,
g_cclosure_marshal_VOID__POINTER,
G_TYPE_NONE, 1,
G_TYPE_POINTER);
}
static void
timezone_map_init (TimezoneMap *map)
{
GError *err = NULL;
map->orig_background = gdk_pixbuf_new_from_file (TIMPZONEDIR"bg.png",&err);
if (!map->orig_background)
{
g_warning ("Could not load background image: %s",
(err) ? err->message : "Unknown error");
g_clear_error (&err);
}
map->orig_background_dim = gdk_pixbuf_new_from_file(TIMPZONEDIR"bg_dim.png",&err);
if (!map->orig_background_dim)
{
g_warning ("Could not load background image: %s",
(err) ? err->message : "Unknown error");
g_clear_error (&err);
}
map->orig_color_map = gdk_pixbuf_new_from_file (TIMPZONEDIR"cc.png",&err);
if (!map->orig_color_map)
{
g_warning ("Could not load background image: %s",
(err) ? err->message : "Unknown error");
g_clear_error (&err);
}
map->pin = gdk_pixbuf_new_from_file (TIMPZONEDIR"pin.png",&err);
if (!map->pin)
{
g_warning ("Could not load pin icon: %s",
(err) ? err->message : "Unknown error");
g_clear_error (&err);
}
map->tzdb = tz_load_db ();
g_signal_connect_object (map,
"button-press-event",
G_CALLBACK (button_press_event),
map,
G_CONNECT_SWAPPED);
}
gboolean timezone_map_set_timezone (TimezoneMap *map,
const gchar *timezone)
{
GPtrArray *locations;
guint i;
g_autofree gchar *real_tz = NULL;
gboolean ret;
real_tz = tz_info_get_clean_name (map->tzdb, timezone);
locations = tz_get_locations (map->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));
return ret;
}
TzLocation *timezone_map_get_location (TimezoneMap *map)
{
return map->location;
}
void timezone_map_set_bubble_text (TimezoneMap *map,
const gchar *text)
{
g_free (map->bubble_text);
map->bubble_text = g_strdup (text);
gtk_widget_queue_draw (GTK_WIDGET (map));
}
TimezoneMap * timezone_map_new (void)
{
return g_object_new (TYPE_TIMEZONE_MAP, NULL);
}
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