gui/graph_canvas.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2009 Nedko Arnaudov <nedko@arnaudov.name>
   6  *
   7  **************************************************************************
   8  * This file contains implementation of graph canvas object
   9  **************************************************************************
  10  *
  11  * LADI Session Handler is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * LADI Session Handler is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  23  * or write to the Free Software Foundation, Inc.,
  24  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include <stdlib.h>
  28 #include <inttypes.h>
  29
  30 #include "graph_canvas.h"
  31 #include "../common/debug.h"
  32
  33 struct graph_canvas
  34 {
  35   graph_handle graph;
  36   canvas_handle canvas;
  37 };
  38
  39 bool
  40 graph_canvas_create(
  41   int width,
  42   int height,
  43   graph_canvas_handle * graph_canvas_handle_ptr)
  44 {
  45   struct graph_canvas * graph_canvas_ptr;
  46
  47   graph_canvas_ptr = malloc(sizeof(struct graph_canvas));
  48   if (graph_canvas_ptr == NULL)
  49   {
  50     return false;
  51   }
  52
  53   if (!canvas_create(width, height, &graph_canvas_ptr->canvas))
  54   {
  55     free(graph_canvas_ptr);
  56     return false;
  57   }
  58
  59   graph_canvas_ptr->graph = NULL;
  60
  61   *graph_canvas_handle_ptr = (graph_canvas_handle)graph_canvas_ptr;
  62
  63   return true;
  64 }
  65
  66 #define graph_canvas_ptr ((struct graph_canvas *)graph_canvas)
  67
  68 static
  69 void
  70 clear(
  71   void * graph_canvas)
  72 {
  73   lash_info("canvas::clear()");
  74 }
  75
  76 static
  77 void
  78 client_appeared(
  79   void * graph_canvas,
  80   uint64_t id,
  81   const char * name)
  82 {
  83   lash_info("canvas::client_appeared(%"PRIu64", \"%s\")", id, name);
  84 }
  85
  86 static
  87 void
  88 client_disappeared(
  89   void * graph_canvas,
  90   uint64_t id)
  91 {
  92   lash_info("canvas::client_disappeared(%"PRIu64")", id);
  93 }
  94
  95 static
  96 void
  97 port_appeared(
  98   void * graph_canvas,
  99   uint64_t client_id,
 100   uint64_t port_id,
 101   const char * port_name,
 102   bool is_input,
 103   bool is_terminal,
 104   bool is_midi)
 105 {
 106   lash_info("canvas::port_appeared(%"PRIu64", %"PRIu64", \"%s\")", client_id, port_id, port_name);
 107 }
 108
 109 static
 110 void
 111 port_disappeared(
 112   void * graph_canvas,
 113   uint64_t client_id,
 114   uint64_t port_id)
 115 {
 116   lash_info("canvas::port_disappeared(%"PRIu64", %"PRIu64")", client_id, port_id);
 117 }
 118
 119 static
 120 void
 121 ports_connected(
 122   void * graph_canvas,
 123   uint64_t client1_id,
 124   uint64_t port1_id,
 125   uint64_t client2_id,
 126   uint64_t port2_id)
 127 {
 128   lash_info("canvas::ports_connected(%"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64")", client1_id, port1_id, client2_id, port2_id);
 129 }
 130
 131 static
 132 void
 133 ports_disconnected(
 134   void * graph_canvas,
 135   uint64_t client1_id,
 136   uint64_t port1_id,
 137   uint64_t client2_id,
 138   uint64_t port2_id)
 139 {
 140   lash_info("canvas::ports_disconnected(%"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64")", client1_id, port1_id, client2_id, port2_id);
 141 }
 142
 143 void
 144 graph_canvas_destroy(
 145   graph_canvas_handle graph_canvas)
 146 {
 147   if (graph_canvas_ptr->graph != NULL)
 148   {
 149     graph_canvas_detach(graph_canvas);
 150   }
 151
 152   free(graph_canvas_ptr);
 153 }
 154
 155 bool
 156 graph_canvas_attach(
 157   graph_canvas_handle graph_canvas,
 158   graph_handle graph)
 159 {
 160   assert(graph_canvas_ptr->graph == NULL);
 161
 162   if (!graph_attach(
 163         graph,
 164         graph_canvas,
 165         clear,
 166         client_appeared,
 167         client_disappeared,
 168         port_appeared,
 169         port_disappeared,
 170         ports_connected,
 171         ports_disconnected))
 172   {
 173     return false;
 174   }
 175
 176   graph_canvas_ptr->graph = graph;
 177
 178   return true;
 179 }
 180
 181 void
 182 graph_canvas_detach(
 183   graph_canvas_handle graph_canvas)
 184 {
 185   assert(graph_canvas_ptr->graph != NULL);
 186   graph_detach(graph_canvas_ptr->graph, graph_canvas);
 187   graph_canvas_ptr->graph = NULL;
 188 }
 189
 190 canvas_handle
 191 graph_canvas_get_canvas(
 192   graph_canvas_handle graph_canvas)
 193 {
 194   return graph_canvas_ptr->canvas;
 195 }