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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 GThreadPool *thread_pool = NULL; | |
29 | static gboolean stop_all_threads = FALSE; | |
30 | ||
31 | static GtkWidget *bgwindow = NULL; | |
32 | static GtkWidget *bgtreeview = NULL; | |
33 | static GtkListStore *bgstore = NULL; | |
34 | ||
35 | static GSList *statusbars_to_update = NULL; | |
36 | ||
37 | static gint bgitemcount = 0; | |
38 | ||
39 | enum | |
40 | { | |
41 | TITLE_COLUMN = 0, | |
42 | PROGRESS_COLUMN, | |
43 | DATA_COLUMN, | |
44 | N_COLUMNS, | |
45 | }; | |
46 | ||
47 | void a_background_update_status ( VikStatusbar *vs, gchar *str ) | |
48 | { | |
49 | gdk_threads_enter (); | |
50 | vik_statusbar_set_message ( vs, 1, str ); | |
51 | gdk_threads_leave (); | |
52 | } | |
53 | ||
54 | static void background_thread_update () | |
55 | { | |
56 | static gchar buf[20]; | |
57 | g_snprintf(buf, sizeof(buf), _("%d items"), bgitemcount); | |
58 | g_slist_foreach ( statusbars_to_update, (GFunc) a_background_update_status, buf ); | |
59 | } | |
60 | ||
61 | int a_background_thread_progress ( gpointer callbackdata, gdouble fraction ) | |
62 | { | |
63 | gpointer *args = (gpointer *) callbackdata; | |
64 | int res = a_background_testcancel ( callbackdata ); | |
65 | if (args[5] != NULL) { | |
66 | gdk_threads_enter(); | |
67 | gtk_list_store_set( GTK_LIST_STORE(bgstore), (GtkTreeIter *) args[5], PROGRESS_COLUMN, fraction*100, -1 ); | |
68 | gdk_threads_leave(); | |
69 | } | |
70 | ||
71 | args[6] = GINT_TO_POINTER(GPOINTER_TO_INT(args[6])-1); | |
72 | bgitemcount--; | |
73 | background_thread_update(); | |
74 | return res; | |
75 | } | |
76 | ||
77 | static void thread_die ( gpointer args[6] ) | |
78 | { | |
79 | vik_thr_free_func userdata_free_func = args[3]; | |
80 | ||
81 | userdata_free_func ( args[2] ); | |
82 | ||
83 | if ( GPOINTER_TO_INT(args[6]) ) | |
84 | { | |
85 | bgitemcount -= GPOINTER_TO_INT(args[6]); | |
86 | background_thread_update (); | |
87 | } | |
88 | ||
89 | g_free ( args[5] ); /* free iter */ | |
90 | g_free ( args ); | |
91 | } | |
92 | ||
93 | int a_background_testcancel ( gpointer callbackdata ) | |
94 | { | |
95 | gpointer *args = (gpointer *) callbackdata; | |
96 | if ( stop_all_threads ) | |
97 | return -1; | |
98 | if ( args && args[0] ) | |
99 | { | |
100 | vik_thr_free_func cleanup = args[4]; | |
101 | if ( cleanup ) | |
102 | cleanup ( args[2] ); | |
103 | return -1; | |
104 | } | |
105 | return 0; | |
106 | } | |
107 | void thread_helper ( gpointer args[6], gpointer user_data ) | |
108 | { | |
109 | /* unpack args */ | |
110 | vik_thr_func func = args[1]; | |
111 | gpointer userdata = args[2]; | |
112 | ||
113 | g_debug(__FUNCTION__); | |
114 | ||
115 | func ( userdata, args ); | |
116 | ||
117 | gdk_threads_enter(); | |
118 | if ( ! args[0] ) | |
119 | gtk_list_store_remove ( bgstore, (GtkTreeIter *) args[5] ); | |
120 | gdk_threads_leave(); | |
121 | ||
122 | thread_die ( args ); | |
123 | } | |
124 | ||
125 | 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 ) | |
126 | { | |
127 | GtkTreeIter *piter = g_malloc ( sizeof ( GtkTreeIter ) ); | |
128 | gpointer *args = g_malloc ( sizeof(gpointer) * 7 ); | |
129 | ||
130 | g_debug(__FUNCTION__); | |
131 | ||
132 | args[0] = GINT_TO_POINTER(0); | |
133 | args[1] = func; | |
134 | args[2] = userdata; | |
135 | args[3] = userdata_free_func; | |
136 | args[4] = userdata_cancel_cleanup_func; | |
137 | args[5] = piter; | |
138 | args[6] = GINT_TO_POINTER(number_items); | |
139 | ||
140 | bgitemcount += number_items; | |
141 | ||
142 | gtk_list_store_append ( bgstore, piter ); | |
143 | gtk_list_store_set ( bgstore, piter, | |
144 | TITLE_COLUMN, message, | |
145 | PROGRESS_COLUMN, 0.0, | |
146 | DATA_COLUMN, args, | |
147 | -1 ); | |
148 | ||
149 | /* run the thread in the background */ | |
150 | g_thread_pool_push( thread_pool, args, NULL ); | |
151 | } | |
152 | ||
153 | void a_background_show_window () | |
154 | { | |
155 | gtk_widget_show_all ( bgwindow ); | |
156 | } | |
157 | ||
158 | static void cancel_job_with_iter ( GtkTreeIter *piter ) | |
159 | { | |
160 | gpointer *args; | |
161 | ||
162 | g_debug(__FUNCTION__); | |
163 | ||
164 | gtk_tree_model_get( GTK_TREE_MODEL(bgstore), piter, DATA_COLUMN, &args, -1 ); | |
165 | ||
166 | /* we know args still exists because it is free _after_ the list item is destroyed */ | |
167 | /* need MUTEX ? */ | |
168 | args[0] = GINT_TO_POINTER(1); /* set killswitch */ | |
169 | ||
170 | gtk_list_store_remove ( bgstore, piter ); | |
171 | args[5] = NULL; | |
172 | } | |
173 | ||
174 | static void bgwindow_response (GtkDialog *dialog, gint arg1 ) | |
175 | { | |
176 | /* note this function is a signal handler called back from the GTK main loop, | |
177 | * so GDK is already locked. We need to release the lock before calling | |
178 | * thread-safe routines | |
179 | */ | |
180 | if ( arg1 == 1 ) /* cancel */ | |
181 | { | |
182 | GtkTreeIter iter; | |
183 | if ( gtk_tree_selection_get_selected ( gtk_tree_view_get_selection ( GTK_TREE_VIEW(bgtreeview) ), NULL, &iter ) ) | |
184 | cancel_job_with_iter ( &iter ); | |
185 | gdk_threads_leave(); | |
186 | background_thread_update(); | |
187 | gdk_threads_enter(); | |
188 | } | |
189 | else if ( arg1 == 2 ) /* clear */ | |
190 | { | |
191 | GtkTreeIter iter; | |
192 | while ( gtk_tree_model_get_iter_first ( GTK_TREE_MODEL(bgstore), &iter ) ) | |
193 | cancel_job_with_iter ( &iter ); | |
194 | gdk_threads_leave(); | |
195 | background_thread_update(); | |
196 | gdk_threads_enter(); | |
197 | } | |
198 | else /* OK */ | |
199 | gtk_widget_hide ( bgwindow ); | |
200 | } | |
201 | ||
202 | void a_background_init() | |
203 | { | |
204 | /* initialize thread pool */ | |
205 | /* TODO parametrize this via preference and/or command line arg */ | |
206 | gint max_threads = 10; /* limit maximum number of threads running at one time */ | |
207 | thread_pool = g_thread_pool_new ( (GFunc) thread_helper, NULL, max_threads, FALSE, NULL ); | |
208 | ||
209 | GtkCellRenderer *renderer; | |
210 | GtkTreeViewColumn *column; | |
211 | GtkWidget *scrolled_window; | |
212 | ||
213 | g_debug(__FUNCTION__); | |
214 | ||
215 | /* store & treeview */ | |
216 | bgstore = gtk_list_store_new ( N_COLUMNS, G_TYPE_STRING, G_TYPE_DOUBLE, G_TYPE_POINTER ); | |
217 | bgtreeview = gtk_tree_view_new_with_model ( GTK_TREE_MODEL(bgstore) ); | |
218 | gtk_tree_view_set_rules_hint (GTK_TREE_VIEW (bgtreeview), TRUE); | |
219 | gtk_tree_selection_set_mode (gtk_tree_view_get_selection (GTK_TREE_VIEW (bgtreeview)), | |
220 | GTK_SELECTION_SINGLE); | |
221 | ||
222 | /* add columns */ | |
223 | renderer = gtk_cell_renderer_text_new (); | |
224 | column = gtk_tree_view_column_new_with_attributes ( _("Job"), renderer, "text", TITLE_COLUMN, NULL ); | |
225 | gtk_tree_view_append_column ( GTK_TREE_VIEW(bgtreeview), column ); | |
226 | ||
227 | renderer = gtk_cell_renderer_progress_new (); | |
228 | column = gtk_tree_view_column_new_with_attributes ( _("Progress"), renderer, "value", PROGRESS_COLUMN, NULL ); | |
229 | gtk_tree_view_append_column ( GTK_TREE_VIEW(bgtreeview), column ); | |
230 | ||
231 | /* setup window */ | |
232 | scrolled_window = gtk_scrolled_window_new ( NULL, NULL ); | |
233 | gtk_container_add ( GTK_CONTAINER(scrolled_window), bgtreeview ); | |
234 | gtk_scrolled_window_set_policy ( GTK_SCROLLED_WINDOW(scrolled_window), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC ); | |
235 | ||
236 | bgwindow = gtk_dialog_new_with_buttons ( "", NULL, 0, GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, GTK_STOCK_DELETE, 1, GTK_STOCK_CLEAR, 2, NULL ); | |
237 | gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(bgwindow)->vbox), scrolled_window, TRUE, TRUE, 0 ); | |
238 | gtk_window_set_default_size ( GTK_WINDOW(bgwindow), 400, 400 ); | |
239 | gtk_window_set_title ( GTK_WINDOW(bgwindow), _("Viking Background Jobs") ); | |
240 | /* don't destroy win */ | |
241 | g_signal_connect ( G_OBJECT(bgwindow), "delete-event", G_CALLBACK(gtk_widget_hide_on_delete), NULL ); | |
242 | ||
243 | g_signal_connect ( G_OBJECT(bgwindow), "response", G_CALLBACK(bgwindow_response), 0 ); | |
244 | ||
245 | } | |
246 | ||
247 | void a_background_uninit() | |
248 | { | |
249 | /* wait until all running threads stop */ | |
250 | stop_all_threads = TRUE; | |
251 | g_thread_pool_free ( thread_pool, TRUE, TRUE ); | |
252 | } | |
253 | ||
254 | void a_background_add_status(VikStatusbar *vs) | |
255 | { | |
256 | statusbars_to_update = g_slist_prepend(statusbars_to_update,vs); | |
257 | } | |
258 | ||
259 | void a_background_remove_status(VikStatusbar *vs) | |
260 | { | |
261 | statusbars_to_update = g_slist_remove(statusbars_to_update,vs); | |
262 | } | |
263 |