Pileus Git - grits/blob - src/objects/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
  23 /* GisPoint */
  24 GisPoint *gis_point_new()
  25 {
  26         return g_new0(GisPoint, 1);
  27 }
  28
  29 void gis_point_set_lle(GisPoint *self, gdouble lat, gdouble lon, gdouble elev)
  30 {
  31         self->lat  = lat;
  32         self->lon  = lon;
  33         self->elev = elev;
  34 }
  35
  36 void gis_point_free(GisPoint *self)
  37 {
  38         g_free(self);
  39 }
  40
  41
  42 /* GisObject */
  43 G_DEFINE_TYPE(GisObject, gis_object, G_TYPE_OBJECT);
  44 static void gis_object_init(GisObject *self) { }
  45 static void gis_object_class_init(GisObjectClass *klass) { }
  46
  47
  48 /* GisMarker */
  49 G_DEFINE_TYPE(GisMarker, gis_marker, GIS_TYPE_OBJECT);
  50 static void gis_marker_init(GisMarker *self) { }
  51
  52 static void gis_marker_finalize(GObject *_self);
  53 static void gis_marker_class_init(GisMarkerClass *klass)
  54 {
  55         G_OBJECT_CLASS(klass)->finalize = gis_marker_finalize;
  56 }
  57
  58 GisMarker *gis_marker_new(const gchar *label)
  59 {
  60         static const int RADIUS =   4;
  61         static const int WIDTH  = 100;
  62         static const int HEIGHT =  20;
  63
  64         GisMarker *self = g_object_new(GIS_TYPE_MARKER, NULL);
  65         self->xoff  = RADIUS;
  66         self->yoff  = HEIGHT-RADIUS;
  67         self->label = g_strdup(label);
  68         self->cairo = cairo_create(cairo_image_surface_create(
  69                                 CAIRO_FORMAT_ARGB32, WIDTH, HEIGHT));
  70         cairo_set_source_rgba(self->cairo, 1, 1, 1, 1);
  71         cairo_arc(self->cairo, self->xoff, self->yoff, RADIUS, 0, 2*G_PI);
  72         cairo_fill(self->cairo);
  73         cairo_move_to(self->cairo, self->xoff+4, self->yoff-8);
  74         cairo_set_font_size(self->cairo, 10);
  75         cairo_show_text(self->cairo, self->label);
  76         return self;
  77 }
  78
  79 static void gis_marker_finalize(GObject *_self)
  80 {
  81         GisMarker *self = GIS_MARKER(_self);
  82         cairo_surface_destroy(cairo_get_target(self->cairo));
  83         cairo_destroy(self->cairo);
  84         g_free(self->label);
  85         g_free(self);
  86 }
  87
  88
  89 /* GisCallback */
  90 G_DEFINE_TYPE(GisCallback, gis_callback, GIS_TYPE_OBJECT);
  91 static void gis_callback_init(GisCallback *self) { }
  92 static void gis_callback_class_init(GisCallbackClass *klass) { }
  93
  94 GisCallback *gis_callback_new(GisCallbackFunc callback, gpointer user_data)
  95 {
  96         GisCallback *self = g_object_new(GIS_TYPE_CALLBACK, NULL);
  97         self->callback  = callback;
  98         self->user_data = user_data;
  99         return self;
 100 }