Pileus Git - grits/blob - src/objects/gis-marker.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 <config.h>
  19 #include "gis-marker.h"
  20
  21 /* GisMarker */
  22 G_DEFINE_TYPE(GisMarker, gis_marker, GIS_TYPE_OBJECT);
  23 static void gis_marker_init(GisMarker *self) { }
  24
  25 static void gis_marker_finalize(GObject *_self);
  26 static void gis_marker_class_init(GisMarkerClass *klass)
  27 {
  28         G_OBJECT_CLASS(klass)->finalize = gis_marker_finalize;
  29 }
  30
  31 GisMarker *gis_marker_new(const gchar *label)
  32 {
  33         static const int RADIUS =   4;
  34         static const int WIDTH  = 100;
  35         static const int HEIGHT =  20;
  36
  37         GisMarker *self = g_object_new(GIS_TYPE_MARKER, NULL);
  38         self->xoff  = RADIUS;
  39         self->yoff  = HEIGHT-RADIUS;
  40         self->label = g_strdup(label);
  41         self->cairo = cairo_create(cairo_image_surface_create(
  42                                 CAIRO_FORMAT_ARGB32, WIDTH, HEIGHT));
  43         cairo_set_source_rgba(self->cairo, 1, 1, 1, 1);
  44         cairo_arc(self->cairo, self->xoff, self->yoff, RADIUS, 0, 2*G_PI);
  45         cairo_fill(self->cairo);
  46         cairo_move_to(self->cairo, self->xoff+4, self->yoff-8);
  47         cairo_set_font_size(self->cairo, 10);
  48         cairo_show_text(self->cairo, self->label);
  49         return self;
  50 }
  51
  52 static void gis_marker_finalize(GObject *_self)
  53 {
  54         GisMarker *self = GIS_MARKER(_self);
  55         cairo_surface_destroy(cairo_get_target(self->cairo));
  56         cairo_destroy(self->cairo);
  57         g_free(self->label);
  58         g_free(self);
  59 }