Pileus Git - grits/blob - src/gis-object.c

   1 /*
   2  * Copyright (C) 2009-2010 Andy Spencer <andy753421@gmail.com>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <glib.h>
  19 #include <GL/glu.h>
  20
  21 #include "gis-object.h"
  22 #include "gis-util.h"
  23
  24 /* GisPoint */
  25 GisPoint *gis_point_new()
  26 {
  27         return g_new0(GisPoint, 1);
  28 }
  29
  30 void gis_point_set_lle(GisPoint *self, gdouble lat, gdouble lon, gdouble elev)
  31 {
  32         self->lat  = lat;
  33         self->lon  = lon;
  34         self->elev = elev;
  35 }
  36
  37 void gis_point_free(GisPoint *self)
  38 {
  39         g_free(self);
  40 }
  41
  42
  43 /* GisObject */
  44 G_DEFINE_TYPE(GisObject, gis_object, G_TYPE_OBJECT);
  45 static void gis_object_init(GisObject *self) { }
  46 static void gis_object_class_init(GisObjectClass *klass) { }
  47
  48
  49 /* GisMarker */
  50 G_DEFINE_TYPE(GisMarker, gis_marker, GIS_TYPE_OBJECT);
  51 static void gis_marker_init(GisMarker *self) { }
  52
  53 static void gis_marker_finalize(GObject *_self);
  54 static void gis_marker_class_init(GisMarkerClass *klass)
  55 {
  56         G_OBJECT_CLASS(klass)->finalize = gis_marker_finalize;
  57 }
  58
  59 GisMarker *gis_marker_new(const gchar *label)
  60 {
  61         static const int RADIUS =   4;
  62         static const int WIDTH  = 100;
  63         static const int HEIGHT =  20;
  64
  65         GisMarker *self = g_object_new(GIS_TYPE_MARKER, NULL);
  66         self->xoff  = RADIUS;
  67         self->yoff  = HEIGHT-RADIUS;
  68         self->label = g_strdup(label);
  69         self->cairo = cairo_create(cairo_image_surface_create(
  70                                 CAIRO_FORMAT_ARGB32, WIDTH, HEIGHT));
  71         cairo_set_source_rgba(self->cairo, 1, 1, 1, 1);
  72         cairo_arc(self->cairo, self->xoff, self->yoff, RADIUS, 0, 2*G_PI);
  73         cairo_fill(self->cairo);
  74         cairo_move_to(self->cairo, self->xoff+4, self->yoff-8);
  75         cairo_set_font_size(self->cairo, 10);
  76         cairo_show_text(self->cairo, self->label);
  77         return self;
  78 }
  79
  80 static void gis_marker_finalize(GObject *_self)
  81 {
  82         GisMarker *self = GIS_MARKER(_self);
  83         cairo_surface_destroy(cairo_get_target(self->cairo));
  84         cairo_destroy(self->cairo);
  85         g_free(self->label);
  86         g_free(self);
  87 }
  88
  89
  90 /* GisCallback */
  91 G_DEFINE_TYPE(GisCallback, gis_callback, GIS_TYPE_OBJECT);
  92 static void gis_callback_init(GisCallback *self) { }
  93 static void gis_callback_class_init(GisCallbackClass *klass) { }
  94
  95 GisCallback *gis_callback_new(GisCallbackFunc callback, gpointer user_data)
  96 {
  97         GisCallback *self = g_object_new(GIS_TYPE_CALLBACK, NULL);
  98         self->callback  = callback;
  99         self->user_data = user_data;
 100         return self;
 101 }