app/dynamic_refresh.c

   1 /* Dia -- an diagram creation/manipulation program
   2  * Copyright (C) 1998 Alexander Larsson
   3  *
   4  * List of "dynamic" (animated) objects, and their refresh rates
   5  * Copyright (C) 2002 Cyrille Chépélov
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21 #include "dynamic_refresh.h"
  22 #include "dynamic_obj.h"
  23 #include "diagram.h"
  24 #include "diagramdata.h"
  25 #include "object_ops.h"
  26 #include "app/connectionpoint_ops.h"
  27 #include <glib.h>
  28
  29 static guint timeout = 0;
  30 static guint idle_id = 0;
  31 static guint timer_id = 0;
  32
  33 static void foreach_dynobj(DiaObject* obj, gpointer data) {
  34     gboolean moved = FALSE;
  35     GList* list = dia_open_diagrams();
  36
  37     while (list != NULL) {
  38         Diagram* dia;
  39         DiagramData* obj_ddata;
  40         Layer* layer;
  41
  42         dia = (Diagram*)list->data;
  43         list = g_list_next(list);
  44
  45         layer = dia_object_get_parent_layer(obj);
  46         if (!layer) continue;
  47
  48         obj_ddata = layer_get_parent_diagram(layer);
  49         if (!obj_ddata) continue;
  50
  51         if (dia->data == obj_ddata) {
  52             if (!moved) {
  53                 obj->ops->move(obj,&obj->position);
  54                 moved = TRUE;
  55             }
  56             object_add_updates(obj,dia);
  57             diagram_update_connections_object(dia,obj, TRUE);
  58         }
  59     }
  60 }
  61
  62 static gboolean timer_handler(gpointer data) {
  63     GList* list;
  64
  65     dynobj_list_foreach(foreach_dynobj,data);
  66
  67     list = dia_open_diagrams();
  68     while (list != NULL) {
  69         Diagram* dia = (Diagram*)list->data;
  70         list = g_list_next(list);
  71
  72         diagram_flush(dia);
  73     }
  74
  75     dynobj_refresh_kick();
  76     return TRUE;
  77 }
  78
  79 static gboolean idle_handler(gpointer data) {
  80     guint new_timeout;
  81
  82     new_timeout = dynobj_list_get_dynobj_rate();
  83     if (timeout != new_timeout) {
  84         if (timer_id) {
  85             gtk_timeout_remove(timer_id);
  86             timer_id = 0;
  87         }
  88         timeout = new_timeout;
  89         if (timeout) {
  90             timer_id = gtk_timeout_add(timeout,timer_handler,NULL);
  91         }
  92     }
  93     idle_id = 0;
  94     return FALSE;
  95 }
  96
  97 void dynobj_refresh_kick(void) {
  98     if (!idle_id)
  99         idle_id = gtk_idle_add_priority(GTK_PRIORITY_LOW,idle_handler,NULL);
 100 }
 101
 102 void dynobj_refresh_init(void) {
 103         /* NOP */
 104 }
 105
 106 void dynobj_refresh_finish(void) {
 107     if (timer_id) gtk_timeout_remove(timer_id);
 108     if (idle_id) gtk_idle_remove(idle_id);
 109 }