src/background.c

   1 /*
   2  * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
   3  *
   4  * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <gtk/gtk.h>
  23 #include <glib/gi18n.h>
  24
  25 #include "vikstatus.h"
  26 #include "background.h"
  27
  28 static GtkWidget *bgwindow = NULL;
  29 static GtkWidget *bgtreeview = NULL;
  30 static GtkListStore *bgstore = NULL;
  31
  32 static GSList *statusbars_to_update = NULL;
  33
  34 static gint bgitemcount = 0;
  35
  36 enum
  37 {
  38   TITLE_COLUMN = 0,
  39   PROGRESS_COLUMN,
  40   DATA_COLUMN,
  41   N_COLUMNS,
  42 };
  43
  44 void a_background_update_status ( VikStatusbar *vs, gchar *str )
  45 {
  46   gdk_threads_enter ();
  47   vik_statusbar_set_message ( vs, 1, str );
  48   gdk_threads_leave ();
  49 }
  50
  51 static void background_thread_update ()
  52 {
  53   static gchar buf[20];
  54   g_snprintf(buf, sizeof(buf), _("%d items"), bgitemcount);
  55   g_slist_foreach ( statusbars_to_update, (GFunc) a_background_update_status, buf );
  56 }
  57
  58 void a_background_thread_progress ( gpointer callbackdata, gdouble fraction )
  59 {
  60   gpointer *args = (gpointer *) callbackdata;
  61   a_background_testcancel ( callbackdata );
  62   gdk_threads_enter();
  63   gtk_list_store_set( GTK_LIST_STORE(bgstore), (GtkTreeIter *) args[5], PROGRESS_COLUMN, fraction*100, -1 );
  64   gdk_threads_leave();
  65
  66   args[6] = GINT_TO_POINTER(GPOINTER_TO_INT(args[6])-1);
  67   bgitemcount--;
  68   background_thread_update();
  69 }
  70
  71 static void thread_die ( gpointer args[6] )
  72 {
  73   vik_thr_free_func userdata_free_func = args[3];
  74
  75   userdata_free_func ( args[2] );
  76
  77   if ( GPOINTER_TO_INT(args[6]) )
  78   {
  79     bgitemcount -= GPOINTER_TO_INT(args[6]);
  80     background_thread_update ();
  81   }
  82
  83   g_free ( args[5] ); /* free iter */
  84   g_free ( args );
  85
  86   g_thread_exit ( NULL );
  87 }
  88
  89 void a_background_testcancel ( gpointer callbackdata )
  90 {
  91   gpointer *args = (gpointer *) callbackdata;
  92   if ( args[0] )
  93   {
  94     vik_thr_free_func cleanup = args[4];
  95     if ( cleanup )
  96       cleanup ( args[2] );
  97     thread_die( args );
  98   }
  99 }
 100
 101 void thread_helper ( gpointer args[6] )
 102 {
 103   /* unpack args */
 104   vik_thr_func func = args[1];
 105   gpointer userdata = args[2];
 106
 107   g_debug(__FUNCTION__);
 108
 109   func ( userdata, args );
 110
 111   gdk_threads_enter();
 112   if ( ! args[0] )
 113     gtk_list_store_remove ( bgstore, (GtkTreeIter *) args[5] );
 114   gdk_threads_leave();
 115
 116   thread_die ( args );
 117 }
 118
 119 void a_background_thread ( GtkWindow *parent, const gchar *message, vik_thr_func func, gpointer userdata, vik_thr_free_func userdata_free_func, vik_thr_free_func userdata_cancel_cleanup_func, gint number_items )
 120 {
 121   GtkTreeIter *piter = g_malloc ( sizeof ( GtkTreeIter ) );
 122   gpointer *args = g_malloc ( sizeof(gpointer) * 7 );
 123
 124   g_debug(__FUNCTION__);
 125
 126   args[0] = GINT_TO_POINTER(0);
 127   args[1] = func;
 128   args[2] = userdata;
 129   args[3] = userdata_free_func;
 130   args[4] = userdata_cancel_cleanup_func;
 131   args[5] = piter;
 132   args[6] = GINT_TO_POINTER(number_items);
 133
 134   bgitemcount += number_items;
 135
 136   gtk_list_store_append ( bgstore, piter );
 137   gtk_list_store_set ( bgstore, piter,
 138                        TITLE_COLUMN, message,
 139                        PROGRESS_COLUMN, 0.0,
 140                        DATA_COLUMN, args,
 141                        -1 );
 142
 143   /* run the thread in the background */
 144   g_thread_create( (GThreadFunc) thread_helper, args, FALSE, NULL );
 145 }
 146
 147 void a_background_show_window ()
 148 {
 149   gtk_widget_show_all ( bgwindow );
 150 }
 151
 152 static void cancel_job_with_iter ( GtkTreeIter *piter )
 153 {
 154     gpointer *args;
 155
 156   g_debug(__FUNCTION__);
 157
 158     gtk_tree_model_get( GTK_TREE_MODEL(bgstore), piter, DATA_COLUMN, &args, -1 );
 159
 160     /* we know args still exists because it is free _after_ the list item is destroyed */
 161     /* need MUTEX ? */
 162     args[0] = GINT_TO_POINTER(1); /* set killswitch */
 163
 164     gtk_list_store_remove ( bgstore, piter );
 165 }
 166
 167 static void bgwindow_response (GtkDialog *dialog, gint arg1 )
 168 {
 169   /* note this function is a signal handler called back from the GTK main loop,
 170    * so GDK is already locked.  We need to release the lock before calling
 171    * thread-safe routines
 172    */
 173   if ( arg1 == 1 ) /* cancel */
 174     {
 175       GtkTreeIter iter;
 176       if ( gtk_tree_selection_get_selected ( gtk_tree_view_get_selection ( GTK_TREE_VIEW(bgtreeview) ), NULL, &iter ) )
 177         cancel_job_with_iter ( &iter );
 178       gdk_threads_leave();
 179       background_thread_update();
 180       gdk_threads_enter();
 181     }
 182   else if ( arg1 == 2 ) /* clear */
 183     {
 184       GtkTreeIter iter;
 185       while ( gtk_tree_model_get_iter_first ( GTK_TREE_MODEL(bgstore), &iter ) )
 186         cancel_job_with_iter ( &iter );
 187       gdk_threads_leave();
 188       background_thread_update();
 189       gdk_threads_enter();
 190     }
 191   else /* OK */
 192     gtk_widget_hide ( bgwindow );
 193 }
 194
 195 void a_background_init()
 196 {
 197   GtkCellRenderer *renderer;
 198   GtkTreeViewColumn *column;
 199   GtkWidget *scrolled_window;
 200
 201   g_debug(__FUNCTION__);
 202
 203   /* store & treeview */
 204   bgstore = gtk_list_store_new ( N_COLUMNS, G_TYPE_STRING, G_TYPE_DOUBLE, G_TYPE_POINTER );
 205   bgtreeview = gtk_tree_view_new_with_model ( GTK_TREE_MODEL(bgstore) );
 206   gtk_tree_view_set_rules_hint (GTK_TREE_VIEW (bgtreeview), TRUE);
 207   gtk_tree_selection_set_mode (gtk_tree_view_get_selection (GTK_TREE_VIEW (bgtreeview)),
 208                                GTK_SELECTION_SINGLE);
 209
 210   /* add columns */
 211   renderer = gtk_cell_renderer_text_new ();
 212   column = gtk_tree_view_column_new_with_attributes ( _("Job"), renderer, "text", TITLE_COLUMN, NULL );
 213   gtk_tree_view_append_column ( GTK_TREE_VIEW(bgtreeview), column );
 214
 215   renderer = gtk_cell_renderer_progress_new ();
 216   column = gtk_tree_view_column_new_with_attributes ( _("Progress"), renderer, "value", PROGRESS_COLUMN, NULL );
 217   gtk_tree_view_append_column ( GTK_TREE_VIEW(bgtreeview), column );
 218
 219   /* setup window */
 220   scrolled_window = gtk_scrolled_window_new ( NULL, NULL );
 221   gtk_container_add ( GTK_CONTAINER(scrolled_window), bgtreeview );
 222   gtk_scrolled_window_set_policy ( GTK_SCROLLED_WINDOW(scrolled_window), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
 223
 224   bgwindow = gtk_dialog_new_with_buttons ( "", NULL, 0, GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, GTK_STOCK_DELETE, 1, GTK_STOCK_CLEAR, 2, NULL );
 225   gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(bgwindow)->vbox), scrolled_window, TRUE, TRUE, 0 );
 226   gtk_window_set_default_size ( GTK_WINDOW(bgwindow), 400, 400 );
 227   gtk_window_set_title ( GTK_WINDOW(bgwindow), _("Viking Background Jobs") );
 228   /* don't destroy win */
 229   g_signal_connect ( G_OBJECT(bgwindow), "delete-event", G_CALLBACK(gtk_widget_hide_on_delete), NULL );
 230
 231   g_signal_connect ( G_OBJECT(bgwindow), "response", G_CALLBACK(bgwindow_response), 0 );
 232
 233 }
 234
 235 void a_background_add_status(VikStatusbar *vs)
 236 {
 237   statusbars_to_update = g_slist_prepend(statusbars_to_update,vs);
 238 }
 239
 240 void a_background_remove_status(VikStatusbar *vs)
 241 {
 242   statusbars_to_update = g_slist_remove(statusbars_to_update,vs);
 243 }
 244