libvaladoc/charts/chart.vala

   1 /* chart.vala
   2  *
   3  * Copyright (C) 2008  Florian Brosch
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  18  *
  19  * Author:
  20  *      Florian Brosch <flo.brosch@gmail.com>
  21  */
  22
  23 [CCode (cname = "valadoc_compat_gvc_init")]
  24 extern void valadoc_gvc_init ();
  25
  26 public class Valadoc.Charts.Chart : Api.Visitor {
  27         protected Gvc.Context context;
  28         protected Gvc.Graph graph;
  29         protected Factory factory;
  30
  31         static construct {
  32                 valadoc_gvc_init ();
  33         }
  34
  35         public Chart (Factory factory, Api.Node node) {
  36                 graph = factory.create_graph (node);
  37                 this.factory = factory;
  38                 node.accept (this);
  39         }
  40
  41         public void save (string file_name, string file_type = "png") {
  42                 if (context == null) {
  43                         context = factory.create_context (graph);
  44                 }
  45                 context.render_filename (graph, file_type, file_name);
  46         }
  47
  48         public void write (GLib.FileStream file, string file_type) {
  49                 if (context == null) {
  50                         context = factory.create_context (graph);
  51                 }
  52                 context.render (graph, file_type, file);
  53         }
  54
  55         public uint8[]? write_buffer (string file_type) {
  56                 if (context == null) {
  57                         context = factory.create_context (graph);
  58                 }
  59
  60                 uint8[]? data;
  61
  62                 /* This will return null in data if it fails. */
  63                 context.render_data (graph, file_type, out data);
  64                 return data;
  65         }
  66
  67         ~Chart () {
  68                 if (context != null) {
  69                         context.free_layout (graph);
  70                 }
  71         }
  72 }
  73