1 /*****************************************************************************
2 * intf_gnome.c: Gnome interface
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
5 * $Id: intf_gnome.c,v 1.18 2001/02/20 23:30:15 sam Exp $
7 * Authors: Samuel Hocevar <sam@zoy.org>
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 #define MODULE_NAME gnome
25 #include "modules_inner.h"
27 /*****************************************************************************
29 *****************************************************************************/
32 #include <errno.h> /* ENOMEM */
33 #include <stdlib.h> /* free() */
34 #include <string.h> /* strerror() */
46 #include "stream_control.h"
47 #include "input_ext-intf.h"
50 #include "interface.h"
52 #include "gnome_sys.h"
53 #include "gnome_interface.h"
54 #include "gnome_support.h"
58 /*****************************************************************************
60 *****************************************************************************/
61 static int intf_Probe ( probedata_t *p_data );
62 static int intf_Open ( intf_thread_t *p_intf );
63 static void intf_Close ( intf_thread_t *p_intf );
64 static void intf_Run ( intf_thread_t *p_intf );
66 static gint GnomeManage ( gpointer p_data );
68 /*****************************************************************************
69 * g_atexit: kludge to avoid the Gnome thread to segfault at exit
70 *****************************************************************************
71 * gtk_init() makes several calls to g_atexit() which calls atexit() to
72 * register tidying callbacks to be called at program exit. Since the Gnome
73 * plugin is likely to be unloaded at program exit, we have to export this
74 * symbol to intercept the g_atexit() calls. Talk about crude hack.
75 *****************************************************************************/
76 void g_atexit( GVoidFunc func )
78 intf_thread_t *p_intf = p_main->p_intf;
80 if( p_intf->p_sys->pf_gdk_callback == NULL )
82 p_intf->p_sys->pf_gdk_callback = func;
84 else if( p_intf->p_sys->pf_gtk_callback == NULL )
86 p_intf->p_sys->pf_gtk_callback = func;
88 /* else nothing, but we could do something here */
92 /*****************************************************************************
93 * Functions exported as capabilities. They are declared as static so that
94 * we don't pollute the namespace too much.
95 *****************************************************************************/
96 void _M( intf_getfunctions )( function_list_t * p_function_list )
98 p_function_list->pf_probe = intf_Probe;
99 p_function_list->functions.intf.pf_open = intf_Open;
100 p_function_list->functions.intf.pf_close = intf_Close;
101 p_function_list->functions.intf.pf_run = intf_Run;
104 /*****************************************************************************
105 * intf_Probe: probe the interface and return a score
106 *****************************************************************************
107 * This function tries to initialize Gnome and returns a score to the
108 * plugin manager so that it can select the best plugin.
109 *****************************************************************************/
110 static int intf_Probe( probedata_t *p_data )
112 if( TestMethod( INTF_METHOD_VAR, "gnome" ) )
120 /*****************************************************************************
121 * intf_Open: initialize and create window
122 *****************************************************************************/
123 static int intf_Open( intf_thread_t *p_intf )
125 /* Allocate instance and initialize some members */
126 p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
127 if( p_intf->p_sys == NULL )
129 intf_ErrMsg("error: %s", strerror(ENOMEM));
133 /* Initialize Gnome thread */
134 p_intf->p_sys->b_popup_changed = 0;
135 p_intf->p_sys->b_window_changed = 0;
136 p_intf->p_sys->b_playlist_changed = 0;
138 p_intf->p_sys->b_scale_isfree = 1;
140 p_intf->p_sys->pf_gtk_callback = NULL;
141 p_intf->p_sys->pf_gdk_callback = NULL;
143 /* Initialize lock */
144 vlc_mutex_init( &p_intf->p_sys->change_lock );
149 /*****************************************************************************
150 * intf_Close: destroy interface window
151 *****************************************************************************/
152 static void intf_Close( intf_thread_t *p_intf )
155 vlc_mutex_destroy( &p_intf->p_sys->change_lock );
157 /* Destroy structure */
158 free( p_intf->p_sys );
161 /*****************************************************************************
162 * intf_Run: Gnome thread
163 *****************************************************************************
164 * this part of the interface is in a separate thread so that we can call
165 * gtk_main() from within it without annoying the rest of the program.
166 * XXX: the approach may look kludgy, and probably is, but I could not find
167 * a better way to dynamically load a Gnome interface at runtime.
168 *****************************************************************************/
169 static void intf_Run( intf_thread_t *p_intf )
171 /* gnome_init needs to know the command line. We don't care, so we
172 * give it an empty one */
173 char *p_args[] = { "" };
175 /* The data types we are allowed to receive */
176 static GtkTargetEntry target_table[] =
178 { "text/uri-list", 0, DROP_ACCEPT_TEXT_URI_LIST },
179 { "text/plain", 0, DROP_ACCEPT_TEXT_PLAIN }
182 /* Initialize Gnome */
183 gnome_init( p_main->psz_arg0, VERSION, 1, p_args );
185 /* Create some useful widgets that will certainly be used */
186 p_intf->p_sys->p_window = create_intf_window( );
187 p_intf->p_sys->p_popup = create_intf_popup( );
189 /* Set the title of the main window */
190 gtk_window_set_title( GTK_WINDOW(p_intf->p_sys->p_window),
191 VOUT_TITLE " (Gnome interface)");
193 /* Accept file drops on the main window */
194 gtk_drag_dest_set( GTK_WIDGET( p_intf->p_sys->p_window ),
195 GTK_DEST_DEFAULT_ALL, target_table,
196 1, GDK_ACTION_COPY );
198 /* We don't create these ones yet because we perhaps won't need them */
199 p_intf->p_sys->p_about = NULL;
200 p_intf->p_sys->p_playlist = NULL;
201 p_intf->p_sys->p_modules = NULL;
202 p_intf->p_sys->p_fileopen = NULL;
204 /* Store p_intf to keep an eye on it */
205 gtk_object_set_data( GTK_OBJECT(p_intf->p_sys->p_window),
208 gtk_object_set_data( GTK_OBJECT(p_intf->p_sys->p_popup),
211 /* Show the control window */
212 gtk_widget_show( p_intf->p_sys->p_window );
214 /* Sleep to avoid using all CPU - since some interfaces needs to access
215 * keyboard events, a 100ms delay is a good compromise */
216 p_intf->p_sys->i_timeout = gtk_timeout_add( INTF_IDLE_SLEEP / 1000,
217 GnomeManage, p_intf );
220 /* Enter gnome mode */
223 /* launch stored callbacks */
224 if( p_intf->p_sys->pf_gtk_callback != NULL )
226 p_intf->p_sys->pf_gtk_callback();
228 if( p_intf->p_sys->pf_gdk_callback != NULL )
230 p_intf->p_sys->pf_gdk_callback();
235 /* following functions are local */
237 /*****************************************************************************
238 * GnomeManage: manage main thread messages
239 *****************************************************************************
240 * In this function, called approx. 10 times a second, we check what the
241 * main program wanted to tell us.
242 *****************************************************************************/
243 static gint GnomeManage( gpointer p_data )
245 intf_thread_t *p_intf = (void *)p_data;
247 vlc_mutex_lock( &p_intf->p_sys->change_lock );
249 /* If the "display popup" flag has changed */
250 if( p_intf->b_menu_change )
252 gnome_popup_menu_do_popup( p_intf->p_sys->p_popup,
253 NULL, NULL, NULL, NULL );
254 p_intf->b_menu_change = 0;
257 /* Manage the slider */
258 if( p_intf->p_input != NULL && p_intf->p_sys->p_window != NULL
259 && p_intf->p_sys->b_scale_isfree )
262 GtkAdjustment *p_adj;
264 p_scale = GTK_WIDGET( gtk_object_get_data( GTK_OBJECT(
265 p_intf->p_sys->p_window ), "hscale" ) );
266 p_adj = gtk_range_get_adjustment ( GTK_RANGE( p_scale ) );
268 /* Update the value */
269 p_adj->value = ( 100. *
270 p_intf->p_input->stream.p_selected_area->i_tell ) /
271 p_intf->p_input->stream.p_selected_area->i_size;
273 /* Gtv does it this way. Why not. */
274 gtk_range_set_adjustment ( GTK_RANGE( p_scale ), p_adj );
275 gtk_range_slider_update ( GTK_RANGE( p_scale ) );
276 gtk_range_clear_background ( GTK_RANGE( p_scale ) );
277 gtk_range_draw_background ( GTK_RANGE( p_scale ) );
280 /* Manage core vlc functions through the callback */
281 p_intf->pf_manage( p_intf );
285 /* Make sure we won't be called again */
286 gtk_timeout_remove( p_intf->p_sys->i_timeout );
288 vlc_mutex_unlock( &p_intf->p_sys->change_lock );
290 /* Prepare to die, young Skywalker */
295 vlc_mutex_unlock( &p_intf->p_sys->change_lock );