1 /*****************************************************************************
2 * intf_gnome.c: Gnome interface
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
5 * $Id: intf_gnome.c,v 1.12 2001/02/15 07:59:38 sam Exp $
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
29 #include <errno.h> /* ENOMEM */
30 #include <stdlib.h> /* free() */
31 #include <string.h> /* strerror() */
43 #include "stream_control.h"
44 #include "input_ext-intf.h"
47 #include "interface.h"
49 #include "gnome_sys.h"
50 #include "gnome_interface.h"
51 #include "gnome_support.h"
55 /*****************************************************************************
57 *****************************************************************************/
58 static int intf_Probe ( probedata_t *p_data );
59 static int intf_Open ( intf_thread_t *p_intf );
60 static void intf_Close ( intf_thread_t *p_intf );
61 static void intf_Run ( intf_thread_t *p_intf );
63 static gint GnomeManage ( gpointer p_data );
65 /*****************************************************************************
66 * g_atexit: kludge to avoid the Gnome thread to segfault at exit
67 *****************************************************************************
68 * gtk_init() makes several calls to g_atexit() which calls atexit() to
69 * register tidying callbacks to be called at program exit. Since the Gnome
70 * plugin is likely to be unloaded at program exit, we have to export this
71 * symbol to intercept the g_atexit() calls. Talk about crude hack.
72 *****************************************************************************/
73 void g_atexit( GVoidFunc func )
75 intf_thread_t *p_intf = p_main->p_intf;
77 if( p_intf->p_sys->pf_gdk_callback == NULL )
79 p_intf->p_sys->pf_gdk_callback = func;
81 else if( p_intf->p_sys->pf_gtk_callback == NULL )
83 p_intf->p_sys->pf_gtk_callback = func;
85 /* else nothing, but we could do something here */
89 /*****************************************************************************
90 * Functions exported as capabilities. They are declared as static so that
91 * we don't pollute the namespace too much.
92 *****************************************************************************/
93 void intf_getfunctions( function_list_t * p_function_list )
95 p_function_list->pf_probe = intf_Probe;
96 p_function_list->functions.intf.pf_open = intf_Open;
97 p_function_list->functions.intf.pf_close = intf_Close;
98 p_function_list->functions.intf.pf_run = intf_Run;
101 /*****************************************************************************
102 * intf_Probe: probe the interface and return a score
103 *****************************************************************************
104 * This function tries to initialize Gnome and returns a score to the
105 * plugin manager so that it can select the best plugin.
106 *****************************************************************************/
107 static int intf_Probe( probedata_t *p_data )
109 if( TestMethod( INTF_METHOD_VAR, "gnome" ) )
117 /*****************************************************************************
118 * intf_Open: initialize and create window
119 *****************************************************************************/
120 static int intf_Open( intf_thread_t *p_intf )
122 /* Allocate instance and initialize some members */
123 p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
124 if( p_intf->p_sys == NULL )
126 intf_ErrMsg("error: %s", strerror(ENOMEM));
130 /* Initialize Gnome thread */
131 p_intf->p_sys->b_popup_changed = 0;
132 p_intf->p_sys->b_window_changed = 0;
133 p_intf->p_sys->b_playlist_changed = 0;
135 p_intf->p_sys->b_scale_isfree = 1;
137 p_intf->p_sys->pf_gtk_callback = NULL;
138 p_intf->p_sys->pf_gdk_callback = NULL;
143 /*****************************************************************************
144 * intf_Close: destroy interface window
145 *****************************************************************************/
146 static void intf_Close( intf_thread_t *p_intf )
148 /* Destroy structure */
149 free( p_intf->p_sys );
152 /*****************************************************************************
153 * intf_Run: Gnome thread
154 *****************************************************************************
155 * this part of the interface is in a separate thread so that we can call
156 * gtk_main() from within it without annoying the rest of the program.
157 * XXX: the approach may look kludgy, and probably is, but I could not find
158 * a better way to dynamically load a Gnome interface at runtime.
159 *****************************************************************************/
160 static void intf_Run( intf_thread_t *p_intf )
162 /* gnome_init needs to know the command line. We don't care, so we
163 * give it an empty one */
164 char *p_args[] = { };
166 /* Initialize Gnome */
167 gnome_init( p_main->psz_arg0, VERSION, 1, p_args );
169 /* create some useful widgets that will certainly be used */
170 p_intf->p_sys->p_window = create_intf_window();
171 p_intf->p_sys->p_popup = create_intf_popup( );
173 /* we don't create these ones yet because we perhaps won't need them */
174 p_intf->p_sys->p_about = NULL;
175 p_intf->p_sys->p_playlist = NULL;
176 p_intf->p_sys->p_modules = NULL;
177 p_intf->p_sys->p_fileopen = NULL;
179 /* store p_sys to keep an eye on it */
180 gtk_object_set_data( GTK_OBJECT(p_intf->p_sys->p_window),
183 gtk_object_set_data( GTK_OBJECT(p_intf->p_sys->p_popup),
186 /* show the control window */
187 gtk_widget_show( p_intf->p_sys->p_window );
189 /* Sleep to avoid using all CPU - since some interfaces needs to access
190 * keyboard events, a 100ms delay is a good compromise */
191 p_intf->p_sys->i_timeout = gtk_timeout_add( INTF_IDLE_SLEEP / 1000,
192 GnomeManage, p_intf );
194 /* enter gnome mode */
197 /* launch stored callbacks */
198 if( p_intf->p_sys->pf_gtk_callback != NULL )
200 p_intf->p_sys->pf_gtk_callback();
202 if( p_intf->p_sys->pf_gdk_callback != NULL )
204 p_intf->p_sys->pf_gdk_callback();
209 /* following functions are local */
211 /*****************************************************************************
212 * GnomeManage: manage main thread messages
213 *****************************************************************************
214 * In this function, called approx. 10 times a second, we check what the
215 * main program wanted to tell us.
216 *****************************************************************************/
217 static gint GnomeManage( gpointer p_data )
219 intf_thread_t *p_intf = (void *)p_data;
221 vlc_mutex_lock( &p_intf->p_sys->change_lock );
223 /* If the "display popup" flag has changed */
224 if( p_intf->b_menu_change )
226 gnome_popup_menu_do_popup( p_intf->p_sys->p_popup,
227 NULL, NULL, NULL, NULL );
228 p_intf->b_menu_change = 0;
231 /* Manage the slider */
232 if( p_intf->p_input != NULL && p_intf->p_sys->p_window != NULL
233 && p_intf->p_sys->b_scale_isfree )
236 GtkAdjustment *p_adj;
238 p_scale = GTK_WIDGET( gtk_object_get_data( GTK_OBJECT(
239 p_intf->p_sys->p_window ), "hscale" ) );
240 p_adj = gtk_range_get_adjustment ( GTK_RANGE( p_scale ) );
242 /* Update the value */
243 p_adj->value = ( 100. * p_intf->p_input->stream.i_tell )
244 / p_intf->p_input->stream.i_size;
246 /* Gtv does it this way. Why not. */
247 gtk_range_set_adjustment ( GTK_RANGE( p_scale ), p_adj );
248 gtk_range_slider_update ( GTK_RANGE( p_scale ) );
249 gtk_range_clear_background ( GTK_RANGE( p_scale ) );
250 gtk_range_draw_background ( GTK_RANGE( p_scale ) );
253 /* Manage core vlc functions through the callback */
254 p_intf->pf_manage( p_intf );
258 /* Make sure we won't be called again */
259 gtk_timeout_remove( p_intf->p_sys->i_timeout );
261 vlc_mutex_unlock( &p_intf->p_sys->change_lock );
263 /* Prepare to die, young Skywalker */
268 vlc_mutex_unlock( &p_intf->p_sys->change_lock );