toolbar menus now add/remove symmetrical

[lttv.git] / ltt / branches / poly / lttv / modules / gui / lttvwindow / lttvwindow / callbacks.c

/* This file is part of the Linux Trace Toolkit viewer
 * Copyright (C) 2003-2004 XangXiu Yang
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License Version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, 
 * MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <gtk/gtk.h>

#include "callbacks.h"
#include "interface.h"
#include "support.h"
#include <ltt/trace.h>
#include <ltt/facility.h>
#include <ltt/time.h>
#include <ltt/event.h>
#include <lttv/lttv.h>
#include <lttv/module.h>
#include <lttv/iattribute.h>
#include <lttv/stats.h>
#include <lttvwindow/mainwindow.h>
#include <lttvwindow/menu.h>
#include <lttvwindow/toolbar.h>
#include <lttvwindow/viewer.h>
#include <lttvwindow/gtkdirsel.h>
#include <lttvwindow/lttvfilter.h>

#define PATH_LENGTH          256
#define DEFAULT_TIME_WIDTH_S   1

extern LttvTrace *g_init_trace ;


/** Array containing instanced objects. */
extern GSList * g_main_window_list;

static int g_win_count = 0;

/** MD : keep old directory. */
static char remember_plugins_dir[PATH_LENGTH] = "";
static char remember_trace_dir[PATH_LENGTH] = "";


MainWindow * get_window_data_struct(GtkWidget * widget);
char * get_unload_module(char ** loaded_module_name, int nb_module);
char * get_remove_trace(char ** all_trace_name, int nb_trace);
char * get_selection(char ** all_name, int nb, char *title, char * column_title);
gboolean get_filter_selection(LttvTracesetSelector *s, char *title, char * column_title);
void * create_tab(MainWindow * parent, MainWindow * current_window,
		  GtkNotebook * notebook, char * label);

void insert_viewer(GtkWidget* widget, lttvwindow_viewer_constructor constructor);
void update_filter(LttvTracesetSelector *s,  GtkTreeStore *store );

void checkbox_changed(GtkTreeView *treeview,
		      GtkTreePath *arg1,
		      GtkTreeViewColumn *arg2,
		      gpointer user_data);
void remove_trace_from_traceset_selector(GtkMultiVPaned * paned, unsigned i);
void add_trace_into_traceset_selector(GtkMultiVPaned * paned, LttTrace * trace);

LttvTracesetSelector * construct_traceset_selector(LttvTraceset * traceset);

void call_pending_read_hooks(MainWindow * mw_data);
unsigned get_max_event_number(MainWindow * mw_data);

enum {
  CHECKBOX_COLUMN,
  NAME_COLUMN,
  TOTAL_COLUMNS
};

enum
{
  MODULE_COLUMN,
  N_COLUMNS
};

/* Construct a selector(filter), which will be associated with a viewer,
 * and provides an interface for user to select interested events and traces
 */

LttvTracesetSelector * construct_traceset_selector(LttvTraceset * traceset)
{
  LttvTracesetSelector  * s;
  LttvTraceSelector     * trace;
  LttvTracefileSelector * tracefile;
  LttvEventtypeSelector * eventtype;
  int i, j, k, m;
  int nb_trace, nb_tracefile, nb_control, nb_per_cpu, nb_facility, nb_event;
  LttvTrace * trace_v;
  LttTrace  * t;
  LttTracefile *tf;
  LttFacility * fac;
  LttEventType * et;

  s = lttv_traceset_selector_new(lttv_traceset_name(traceset));
  nb_trace = lttv_traceset_number(traceset);
  for(i=0;i<nb_trace;i++){
    trace_v = lttv_traceset_get(traceset, i);
    t       = lttv_trace(trace_v);
    trace   = lttv_trace_selector_new(t);
    lttv_traceset_selector_trace_add(s, trace);

    nb_facility = ltt_trace_facility_number(t);
    for(k=0;k<nb_facility;k++){
      fac = ltt_trace_facility_get(t,k);
      nb_event = (int) ltt_facility_eventtype_number(fac);
      for(m=0;m<nb_event;m++){
	et = ltt_facility_eventtype_get(fac,m);
	eventtype = lttv_eventtype_selector_new(et);
	lttv_trace_selector_eventtype_add(trace, eventtype);
      }
    }

    nb_control = ltt_trace_control_tracefile_number(t);
    nb_per_cpu = ltt_trace_per_cpu_tracefile_number(t);
    nb_tracefile = nb_control + nb_per_cpu;

    for(j = 0 ; j < nb_tracefile ; j++) {
      if(j < nb_control)
        tf = ltt_trace_control_tracefile_get(t, j);
      else
        tf = ltt_trace_per_cpu_tracefile_get(t, j - nb_control);     
      tracefile = lttv_tracefile_selector_new(tf);  
      lttv_trace_selector_tracefile_add(trace, tracefile);
      lttv_eventtype_selector_copy(trace, tracefile);
    }
  } 
  return s;
}


/* insert_viewer function constructs an instance of a viewer first,
 * then inserts the widget of the instance into the container of the
 * main window
 */

void
insert_viewer_wrap(GtkWidget *menuitem, gpointer user_data)
{
  guint val = 20;

  insert_viewer((GtkWidget*)menuitem, (lttvwindow_viewer_constructor)user_data);
  //  selected_hook(&val);
}


/* internal functions */
void insert_viewer(GtkWidget* widget, lttvwindow_viewer_constructor constructor)
{
  GtkMultiVPaned * multi_vpaned;
  MainWindow * mw_data;  
  GtkWidget * viewer;
  LttvTracesetSelector  * s;
  TimeInterval * time_interval;

  mw_data = get_window_data_struct(widget);
  if(!mw_data->current_tab) return;
  multi_vpaned = mw_data->current_tab->multi_vpaned;

  s = construct_traceset_selector(mw_data->current_tab->traceset_info->traceset);
  viewer = (GtkWidget*)constructor(mw_data, s, "Traceset_Selector");
  if(viewer)
  {
    gtk_multi_vpaned_widget_add(multi_vpaned, viewer); 
    // We unref here, because it is now referenced by the multi_vpaned!
    g_object_unref(G_OBJECT(viewer));

    // The viewer will show itself when it receives a show notify
    // So we call the show notify hooks here. It will
    // typically add hooks for reading, we call process trace, and the
    // end of reading hook will call gtk_widget_show and unregister the
    // hooks.
    // Note that show notify gets the time_requested through the call_data.
    //show_viewer(mw_data);
    // in expose now call_pending_read_hooks(mw_data);
  }
}


/* get_label function is used to get user input, it displays an input
 * box, which allows user to input a string 
 */

void get_label_string (GtkWidget * text, gchar * label) 
{
  GtkEntry * entry = (GtkEntry*)text;
  if(strlen(gtk_entry_get_text(entry))!=0)
    strcpy(label,gtk_entry_get_text(entry)); 
}

gboolean get_label(MainWindow * mw, gchar * str, gchar* dialogue_title, gchar * label_str)
{
  GtkWidget * dialogue;
  GtkWidget * text;
  GtkWidget * label;
  gint id;

  dialogue = gtk_dialog_new_with_buttons(dialogue_title,NULL,
					 GTK_DIALOG_MODAL,
					 GTK_STOCK_OK,GTK_RESPONSE_ACCEPT,
					 GTK_STOCK_CANCEL,GTK_RESPONSE_REJECT,
					 NULL); 

  label = gtk_label_new(label_str);
  gtk_widget_show(label);

  text = gtk_entry_new();
  gtk_widget_show(text);

  gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialogue)->vbox), label,TRUE, TRUE,0);
  gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialogue)->vbox), text,FALSE, FALSE,0);

  id = gtk_dialog_run(GTK_DIALOG(dialogue));
  switch(id){
    case GTK_RESPONSE_ACCEPT:
      get_label_string(text,str);
      gtk_widget_destroy(dialogue);
      break;
    case GTK_RESPONSE_REJECT:
    default:
      gtk_widget_destroy(dialogue);
      return FALSE;
  }
  return TRUE;
}


/* get_window_data_struct function is actually a lookup function,
 * given a widget which is in the tree of the main window, it will
 * return the MainWindow data structure associated with main window
 */

MainWindow * get_window_data_struct(GtkWidget * widget)
{
  GtkWidget * mw;
  MainWindow * mw_data;

  mw = lookup_widget(widget, "MWindow");
  if(mw == NULL){
    g_printf("Main window does not exist\n");
    return;
  }
  
  mw_data = (MainWindow *) g_object_get_data(G_OBJECT(mw),"mainWindow");
  if(mw_data == NULL){
    g_printf("Main window data does not exist\n");
    return;
  }
  return mw_data;
}


/* create_new_window function, just constructs a new main window
 */

void create_new_window(GtkWidget* widget, gpointer user_data, gboolean clone)
{
  MainWindow * parent = get_window_data_struct(widget);

  if(clone){
    g_printf("Clone : use the same traceset\n");
    construct_main_window(parent);
  }else{
    g_printf("Empty : traceset is set to NULL\n");
    construct_main_window(NULL);
  }
}


/* move_*_viewer functions move the selected view up/down in 
 * the current tab
 */

void move_up_viewer(GtkWidget * widget, gpointer user_data)
{
  MainWindow * mw = get_window_data_struct(widget);
  if(!mw->current_tab) return;
  gtk_multi_vpaned_widget_move_up(mw->current_tab->multi_vpaned);
}

void move_down_viewer(GtkWidget * widget, gpointer user_data)
{
  MainWindow * mw = get_window_data_struct(widget);
  if(!mw->current_tab) return;
  gtk_multi_vpaned_widget_move_down(mw->current_tab->multi_vpaned);
}


/* delete_viewer deletes the selected viewer in the current tab
 */

void delete_viewer(GtkWidget * widget, gpointer user_data)
{
  MainWindow * mw = get_window_data_struct(widget);
  if(!mw->current_tab) return;
  gtk_multi_vpaned_widget_delete(mw->current_tab->multi_vpaned);
}


/* open_traceset will open a traceset saved in a file
 * Right now, it is not finished yet, (not working)
 * FIXME
 */

void open_traceset(GtkWidget * widget, gpointer user_data)
{
  char ** dir;
  gint id;
  LttvTraceset * traceset;
  MainWindow * mw_data = get_window_data_struct(widget);
  GtkFileSelection * file_selector = 
    (GtkFileSelection *)gtk_file_selection_new("Select a traceset");

  gtk_file_selection_hide_fileop_buttons(file_selector);
  
  id = gtk_dialog_run(GTK_DIALOG(file_selector));
  switch(id){
    case GTK_RESPONSE_ACCEPT:
    case GTK_RESPONSE_OK:
      dir = gtk_file_selection_get_selections (file_selector);
      traceset = lttv_traceset_load(dir[0]);
      g_printf("Open a trace set %s\n", dir[0]); 
      //Not finished yet
      g_strfreev(dir);
    case GTK_RESPONSE_REJECT:
    case GTK_RESPONSE_CANCEL:
    default:
      gtk_widget_destroy((GtkWidget*)file_selector);
      break;
  }

}


/* get_max_event_number returns the event number limit used by
 * lttv_process_traceset(LttvTracesetContext, endTime, maxNumEvents)
 * each viewer can set the limit
 */

unsigned get_max_event_number(MainWindow * mw_data)
{
  unsigned nb = 0, *size;
  GtkWidget * w;

  w = gtk_multi_vpaned_get_first_widget(mw_data->current_tab->multi_vpaned);  
  while(w){
    size = (unsigned*)g_object_get_data(G_OBJECT(w), MAX_NUMBER_EVENT);
    if(size == NULL){
      nb = G_MAXULONG;
      break;
    }else{
      if(nb < *size)
	nb = *size;
    }
    w = gtk_multi_vpaned_get_next_widget(mw_data->current_tab->multi_vpaned);  
  }  
  return nb;
}


/* call_pending_read_hooks parses the traceset first by calling 
 * process_traceset, then display all viewers of 
 * the current tab
 * It will then remove all entries from the time_requests array.
 * CHECK : we give more events than requested to the viewers. They
 * Have to filter them by themselves.
 */

gint compare_time_request(TimeRequest *a, TimeRequest *b)
{
  return ltt_time_compare(a->time_window.start_time, b->time_window.start_time);
}

void call_pending_read_hooks(MainWindow * mw_data)
{
  unsigned max_nb_events;
  GdkWindow * win;
  GdkCursor * new;
  GtkWidget* widget;
  int i;
  LttvTracesetContext *tsc;
  
  /* Current tab check : if no current tab is present, no hooks to call. */
  /* It makes the expose works.. */
  if(mw_data->current_tab == NULL)
    return;

  if(mw_data->current_tab->time_requests->len == 0)
    return;

  LttvHooks *tmp_hooks = lttv_hooks_new();

  tsc = 
   LTTV_TRACESET_CONTEXT(mw_data->current_tab->traceset_info->
                            traceset_context);

  //set the cursor to be X shape, indicating that the computer is busy in doing its job
  new = gdk_cursor_new(GDK_X_CURSOR);
  widget = lookup_widget(mw_data->mwindow, "MToolbar1");
  win = gtk_widget_get_parent_window(widget);  
  gdk_window_set_cursor(win, new);
  gdk_cursor_unref(new);  
  gdk_window_stick(win);
  gdk_window_unstick(win);


  g_array_sort(mw_data->current_tab->time_requests,
               (GCompareFunc)compare_time_request);


  //update time window of each viewer, let viewer insert hooks needed by process_traceset
  //lttvwindow_report_time_window(mw_data, time_window);
  
  //max_nb_events = get_max_event_number(mw_data);

  //call hooks to show each viewer and let them remove hooks
  //show_viewer(mw_data);  

  // FIXME
  // call process trace for each time interval
  // Will have to be combined!
  g_critical("SIZE time req len  : %d", mw_data->current_tab->time_requests->len);
  
  //g_assert(mw_data->current_tab->time_requests->len <= 1); //FIXME
  /* Go through each time request. As they are already sorted by start_time,
   * we check with the current event time if processing is needed. */
  for(i=0; i < mw_data->current_tab->time_requests->len; i++)
  {
    g_critical("RUN i %d", i);
    TimeRequest *time_request = 
        &g_array_index(mw_data->current_tab->time_requests, TimeRequest, i);
    LttTime end_time = ltt_time_add( time_request->time_window.start_time,
                                     time_request->time_window.time_width);
    
    if(i == 0 || !(ltt_time_compare(time_request->time_window.start_time, ltt_event_time(tsc->e))<0) )
    {
      /* do it if first request or start_time >= last event's time */
      lttv_process_traceset_seek_time(tsc, time_request->time_window.start_time);
      lttv_process_traceset(tsc, end_time, time_request->num_events);
    }
    else
    {
      if(ltt_time_compare(time_request->time_window.start_time, ltt_event_time(tsc->e))<0
          && !(ltt_time_compare(end_time, ltt_event_time(tsc->e))<0))
      {
        /* Continue reading from current event */
        lttv_process_traceset(tsc, end_time, time_request->num_events);

      }
      else
      {
        if(ltt_time_compare(time_request->time_window.start_time, end_time) > 0)
        {
          /* This is a request for a minimum number of events, give
           * more events than necessary */
          lttv_process_traceset(tsc, end_time, time_request->num_events);
        }
      }
    }

    /* Call the end of process_traceset hook */
    lttv_hooks_add(tmp_hooks,
                   time_request->after_hook,
                   time_request->after_hook_data);
    lttv_hooks_call(tmp_hooks, time_request);
    lttv_hooks_remove(tmp_hooks, time_request->after_hook);
  }
  
  /* Free the time requests */
  g_array_free(mw_data->current_tab->time_requests, TRUE);
  mw_data->current_tab->time_requests = 
        g_array_new(FALSE, FALSE, sizeof(TimeRequest));
  
  mw_data->current_tab->time_request_pending = FALSE;
  
  lttv_hooks_destroy(tmp_hooks);
  
  //set the cursor back to normal
  gdk_window_set_cursor(win, NULL);  
}


/* add_trace_into_traceset_selector, each instance of a viewer has an associated
 * selector (filter), when a trace is added into traceset, the selector should 
 * reflect the change. The function is used to update the selector 
 */

void add_trace_into_traceset_selector(GtkMultiVPaned * paned, LttTrace * t)
{
  int j, k, m, nb_tracefile, nb_control, nb_per_cpu, nb_facility, nb_event;
  LttvTracesetSelector  * s;
  LttvTraceSelector     * trace;
  LttvTracefileSelector * tracefile;
  LttvEventtypeSelector * eventtype;
  LttTracefile          * tf;
  GtkWidget             * w;
  LttFacility           * fac;
  LttEventType          * et;

  w = gtk_multi_vpaned_get_first_widget(paned);  
  while(w){
    s = g_object_get_data(G_OBJECT(w), "Traceset_Selector");
    
    if(s){
      trace   = lttv_trace_selector_new(t);
      lttv_traceset_selector_trace_add(s, trace);

      nb_facility = ltt_trace_facility_number(t);
      for(k=0;k<nb_facility;k++){
	fac = ltt_trace_facility_get(t,k);
	nb_event = (int) ltt_facility_eventtype_number(fac);
	for(m=0;m<nb_event;m++){
	  et = ltt_facility_eventtype_get(fac,m);
	  eventtype = lttv_eventtype_selector_new(et);
	  lttv_trace_selector_eventtype_add(trace, eventtype);
	}
      }
      
      nb_control = ltt_trace_control_tracefile_number(t);
      nb_per_cpu = ltt_trace_per_cpu_tracefile_number(t);
      nb_tracefile = nb_control + nb_per_cpu;
      
      for(j = 0 ; j < nb_tracefile ; j++) {
	if(j < nb_control)
	  tf = ltt_trace_control_tracefile_get(t, j);
	else
	  tf = ltt_trace_per_cpu_tracefile_get(t, j - nb_control);     
	tracefile = lttv_tracefile_selector_new(tf);  
	lttv_trace_selector_tracefile_add(trace, tracefile);
	lttv_eventtype_selector_copy(trace, tracefile);
      }
    }else g_warning("Module does not support filtering\n");

    w = gtk_multi_vpaned_get_next_widget(paned);  
  }
}


/* add_trace adds a trace into the current traceset. It first displays a 
 * directory selection dialogue to let user choose a trace, then recreates
 * tracset_context, and redraws all the viewer of the current tab 
 */

void add_trace(GtkWidget * widget, gpointer user_data)
{
  LttTrace *trace;
  LttvTrace * trace_v;
  LttvTraceset * traceset;
  const char * dir;
  gint id;
  gint i;
  MainWindow * mw_data = get_window_data_struct(widget);
  GtkDirSelection * file_selector = (GtkDirSelection *)gtk_dir_selection_new("Select a trace");
  gtk_dir_selection_hide_fileop_buttons(file_selector);
  if(remember_trace_dir[0] != '\0')
    gtk_dir_selection_set_filename(file_selector, remember_trace_dir);
  
  id = gtk_dialog_run(GTK_DIALOG(file_selector));
  switch(id){
    case GTK_RESPONSE_ACCEPT:
    case GTK_RESPONSE_OK:
      dir = gtk_dir_selection_get_dir (file_selector);
      strncpy(remember_trace_dir, dir, PATH_LENGTH);
      if(!dir || strlen(dir) == 0){
      	gtk_widget_destroy((GtkWidget*)file_selector);
      	break;
      }
      trace = ltt_trace_open(dir);
      if(trace == NULL) g_critical("cannot open trace %s", dir);
      trace_v = lttv_trace_new(trace);
      traceset = mw_data->current_tab->traceset_info->traceset;

      //Keep a reference to the traces so they are not freed.
      for(i=0; i<lttv_traceset_number(traceset); i++)
      {
        LttvTrace * trace = lttv_traceset_get(traceset, i);
        lttv_trace_ref(trace);
      }

      //remove state update hooks
      lttv_state_remove_event_hooks(
         (LttvTracesetState*)mw_data->current_tab->traceset_info->traceset_context);

      lttv_context_fini(LTTV_TRACESET_CONTEXT(
              mw_data->current_tab->traceset_info->traceset_context));
      g_object_unref(mw_data->current_tab->traceset_info->traceset_context);
  

      lttv_traceset_add(traceset, trace_v);

      /* Create new context */
      mw_data->current_tab->traceset_info->traceset_context =
                            	g_object_new(LTTV_TRACESET_STATS_TYPE, NULL);
      lttv_context_init(
              	LTTV_TRACESET_CONTEXT(mw_data->current_tab->traceset_info->
			                                    traceset_context),
                traceset); 
      //add state update hooks
      lttv_state_add_event_hooks(
      (LttvTracesetState*)mw_data->current_tab->traceset_info->traceset_context);
      //Remove local reference to the traces.
      for(i=0; i<lttv_traceset_number(traceset); i++)
      {
        LttvTrace * trace = lttv_traceset_get(traceset, i);
        lttv_trace_unref(trace);
      }


      add_trace_into_traceset_selector(mw_data->current_tab->multi_vpaned, trace);

      gtk_widget_destroy((GtkWidget*)file_selector);
      
      //update current tab
      //update_traceset(mw_data);

      //get_traceset_time_span(mw_data,LTTV_TRACESET_CONTEXT(mw_data->current_tab->traceset_info->traceset_context)->Time_Span);
      if(
       lttv_traceset_number(mw_data->current_tab->traceset_info->traceset) == 1
       || ltt_time_compare(mw_data->current_tab->current_time,
            LTTV_TRACESET_CONTEXT(mw_data->current_tab->traceset_info->
                    traceset_context)->Time_Span->startTime)<0)
      {
        /* Set initial time if this is the first trace in the traceset */
      	mw_data->current_tab->current_time = 
           LTTV_TRACESET_CONTEXT(mw_data->current_tab->traceset_info->
                        traceset_context)->Time_Span->startTime;
	      mw_data->current_tab->time_window.start_time = 
           mw_data->current_tab->current_time;
	      mw_data->current_tab->time_window.time_width.tv_sec = 
           DEFAULT_TIME_WIDTH_S;
	      mw_data->current_tab->time_window.time_width.tv_nsec = 0;
      } 

      /* Call the updatetraceset hooks */
      
      SetTraceset(mw_data, (gpointer)traceset);
      // in expose now call_pending_read_hooks(mw_data);
      
      //lttvwindow_report_current_time(mw_data,&(mw_data->current_tab->current_time));
      break;
    case GTK_RESPONSE_REJECT:
    case GTK_RESPONSE_CANCEL:
    default:
      gtk_widget_destroy((GtkWidget*)file_selector);
      break;
  }
}


/* remove_trace_into_traceset_selector, each instance of a viewer has an associated
 * selector (filter), when a trace is remove from traceset, the selector should 
 * reflect the change. The function is used to update the selector 
 */

void remove_trace_from_traceset_selector(GtkMultiVPaned * paned, unsigned i)
{
  LttvTracesetSelector * s;
  LttvTraceSelector * t;
  GtkWidget * w; 
  
  w = gtk_multi_vpaned_get_first_widget(paned);  
  while(w){
    s = g_object_get_data(G_OBJECT(w), "Traceset_Selector");
    if(s){
      t = lttv_traceset_selector_trace_get(s,i);
      lttv_traceset_selector_trace_remove(s, i);
      lttv_trace_selector_destroy(t);
    }g_warning("Module dose not support filtering\n");
    w = gtk_multi_vpaned_get_next_widget(paned);  
  }
}


/* remove_trace removes a trace from the current traceset if all viewers in 
 * the current tab are not interested in the trace. It first displays a 
 * dialogue, which shows all traces in the current traceset, to let user choose 
 * a trace, then it checks if all viewers unselect the trace, if it is true, 
 * it will remove the trace,  recreate the traceset_contex,
 * and redraws all the viewer of the current tab. If there is on trace in the
 * current traceset, it will delete all viewers of the current tab
 */

void remove_trace(GtkWidget * widget, gpointer user_data)
{
  LttTrace *trace;
  LttvTrace * trace_v;
  LttvTraceset * traceset;
  gint i, j, nb_trace;
  char ** name, *remove_trace_name;
  MainWindow * mw_data = get_window_data_struct(widget);
  LttvTracesetSelector * s;
  LttvTraceSelector * t;
  GtkWidget * w; 
  gboolean selected;
  
  nb_trace =lttv_traceset_number(mw_data->current_tab->traceset_info->traceset); 
  name = g_new(char*,nb_trace);
  for(i = 0; i < nb_trace; i++){
    trace_v = lttv_traceset_get(mw_data->current_tab->
				traceset_info->traceset, i);
    trace = lttv_trace(trace_v);
    name[i] = ltt_trace_name(trace);
  }

  remove_trace_name = get_remove_trace(name, nb_trace);

  if(remove_trace_name){
    for(i=0; i<nb_trace; i++){
      if(strcmp(remove_trace_name,name[i]) == 0){
	//unselect the trace from the current viewer
	w = gtk_multi_vpaned_get_widget(mw_data->current_tab->multi_vpaned);  
	if(w){
	  s = g_object_get_data(G_OBJECT(w), "Traceset_Selector");
	  if(s){
	    t = lttv_traceset_selector_trace_get(s,i);
	    lttv_trace_selector_set_selected(t, FALSE);
	  }

	  //check if other viewers select the trace
	  w = gtk_multi_vpaned_get_first_widget(mw_data->current_tab->multi_vpaned);  
	  while(w){
	    s = g_object_get_data(G_OBJECT(w), "Traceset_Selector");
	    if(s){
	      t = lttv_traceset_selector_trace_get(s,i);
	      selected = lttv_trace_selector_get_selected(t);
	      if(selected)break;
	    }
	    w = gtk_multi_vpaned_get_next_widget(mw_data->current_tab->multi_vpaned);  
	  }
	}else selected = FALSE;

	//if no viewer selects the trace, remove it
	if(!selected){
	  remove_trace_from_traceset_selector(mw_data->current_tab->multi_vpaned, i);

	  traceset = mw_data->current_tab->traceset_info->traceset;
	  trace_v = lttv_traceset_get(traceset, i);
	  if(lttv_trace_get_ref_number(trace_v) <= 1)
	    ltt_trace_close(lttv_trace(trace_v));

    //Keep a reference to the traces so they are not freed.
    for(j=0; j<lttv_traceset_number(traceset); j++)
    {
      LttvTrace * trace = lttv_traceset_get(traceset, j);
      lttv_trace_ref(trace);
    }

    //remove state update hooks
    lttv_state_remove_event_hooks(
         (LttvTracesetState*)mw_data->current_tab->traceset_info->traceset_context);
    lttv_context_fini(LTTV_TRACESET_CONTEXT(mw_data->current_tab->traceset_info->traceset_context));
    g_object_unref(mw_data->current_tab->traceset_info->traceset_context);

    
	  lttv_traceset_remove(traceset, i);
    lttv_trace_unref(trace_v);  // Remove local reference
	  if(!lttv_trace_get_ref_number(trace_v))
	     lttv_trace_destroy(trace_v);
    
	  mw_data->current_tab->traceset_info->traceset_context =
	    g_object_new(LTTV_TRACESET_STATS_TYPE, NULL);
    lttv_context_init(
			    LTTV_TRACESET_CONTEXT(mw_data->current_tab->
				      traceset_info->traceset_context),traceset);      
      //add state update hooks
    lttv_state_add_event_hooks(
      (LttvTracesetState*)mw_data->current_tab->traceset_info->traceset_context);

    //Remove local reference to the traces.
    for(j=0; j<lttv_traceset_number(traceset); j++)
    {
      LttvTrace * trace = lttv_traceset_get(traceset, j);
      lttv_trace_unref(trace);
    }


	  //update current tab
	  //update_traceset(mw_data);
	  if(nb_trace > 1){

      SetTraceset(mw_data, (gpointer)traceset);
  	  // in expose now call_pending_read_hooks(mw_data);

	    //lttvwindow_report_current_time(mw_data,&(mw_data->current_tab->current_time));
	  }else{
	    if(mw_data->current_tab){
	      while(mw_data->current_tab->multi_vpaned->num_children){
		gtk_multi_vpaned_widget_delete(mw_data->current_tab->multi_vpaned);
	      }    
	    }	    
	  }
	}
	break;
      }
    }
  }

  g_free(name);
}


/* save will save the traceset to a file
 * Not implemented yet FIXME
 */

void save(GtkWidget * widget, gpointer user_data)
{
  g_printf("Save\n");
}

void save_as(GtkWidget * widget, gpointer user_data)
{
  g_printf("Save as\n");
}


/* zoom will change the time_window of all the viewers of the 
 * current tab, and redisplay them. The main functionality is to 
 * determine the new time_window of the current tab
 */

void zoom(GtkWidget * widget, double size)
{
  TimeInterval *time_span;
  TimeWindow new_time_window;
  LttTime    current_time, time_delta, time_s, time_e, time_tmp;
  MainWindow * mw_data = get_window_data_struct(widget);

  if(size == 1) return;

  time_span = LTTV_TRACESET_CONTEXT(mw_data->current_tab->
				    traceset_info->traceset_context)->Time_Span;
  new_time_window =  mw_data->current_tab->time_window;
  current_time = mw_data->current_tab->current_time;
  
  time_delta = ltt_time_sub(time_span->endTime,time_span->startTime);
  if(size == 0){
    new_time_window.start_time = time_span->startTime;
    new_time_window.time_width = time_delta;
  }else{
    new_time_window.time_width = ltt_time_div(new_time_window.time_width, size);
    if(ltt_time_compare(new_time_window.time_width,time_delta) > 0)
    { /* Case where zoom out is bigger than trace length */
      new_time_window.start_time = time_span->startTime;
      new_time_window.time_width = time_delta;
    }
    else
    {
      /* Center the image on the current time */
      g_critical("update is HERE");
      new_time_window.start_time = 
        ltt_time_sub(current_time, ltt_time_div(new_time_window.time_width, 2.0));
      /* If on borders, don't fall off */
      if(ltt_time_compare(new_time_window.start_time, time_span->startTime) <0)
      {
        new_time_window.start_time = time_span->startTime;
      }
      else 
      {
        if(ltt_time_compare(
           ltt_time_add(new_time_window.start_time, new_time_window.time_width),
           time_span->endTime) > 0)
        {
          new_time_window.start_time = 
                  ltt_time_sub(time_span->endTime, new_time_window.time_width);
        }
      }
      
    }

    

    //time_tmp = ltt_time_div(new_time_window.time_width, 2);
    //if(ltt_time_compare(current_time, time_tmp) < 0){
    //  time_s = time_span->startTime;
    //} else {
    //  time_s = ltt_time_sub(current_time,time_tmp);
    //}
    //time_e = ltt_time_add(current_time,time_tmp);
    //if(ltt_time_compare(time_span->startTime, time_s) > 0){
    //  time_s = time_span->startTime;
    //}else if(ltt_time_compare(time_span->endTime, time_e) < 0){
    //  time_e = time_span->endTime;
    //  time_s = ltt_time_sub(time_e,new_time_window.time_width);
    //}
    //new_time_window.start_time = time_s;    
  }

  //lttvwindow_report_time_window(mw_data, &new_time_window);
  //call_pending_read_hooks(mw_data);

  //lttvwindow_report_current_time(mw_data,&(mw_data->current_tab->current_time));
  set_time_window(mw_data, &new_time_window);
  // in expose now call_pending_read_hooks(mw_data);
  gtk_multi_vpaned_set_adjust(mw_data->current_tab->multi_vpaned, &new_time_window, FALSE);
}

void zoom_in(GtkWidget * widget, gpointer user_data)
{
  zoom(widget, 2);
}

void zoom_out(GtkWidget * widget, gpointer user_data)
{
  zoom(widget, 0.5);
}

void zoom_extended(GtkWidget * widget, gpointer user_data)
{
  zoom(widget, 0);
}

void go_to_time(GtkWidget * widget, gpointer user_data)
{
  g_printf("Go to time\n");
}

void show_time_frame(GtkWidget * widget, gpointer user_data)
{
  g_printf("Show time frame\n");  
}


/* callback function */

void
on_empty_traceset_activate             (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  create_new_window((GtkWidget*)menuitem, user_data, FALSE);
}


void
on_clone_traceset_activate             (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  create_new_window((GtkWidget*)menuitem, user_data, TRUE);
}


/* create_new_tab calls create_tab to construct a new tab in the main window
 */

void create_new_tab(GtkWidget* widget, gpointer user_data){
  gchar label[PATH_LENGTH];
  MainWindow * mw_data = get_window_data_struct(widget);
  GtkNotebook * notebook = (GtkNotebook *)lookup_widget(widget, "MNotebook");
  if(notebook == NULL){
    g_printf("Notebook does not exist\n");
    return;
  }

  strcpy(label,"Page");
  if(get_label(mw_data, label,"Get the name of the tab","Please input tab's name"))    
    create_tab (NULL, mw_data, notebook, label);
}

void
on_tab_activate                        (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  create_new_tab((GtkWidget*)menuitem, user_data);
}


void
on_open_activate                       (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  open_traceset((GtkWidget*)menuitem, user_data);
}


void
on_close_activate                      (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  MainWindow * mw_data = get_window_data_struct((GtkWidget*)menuitem);
  main_window_destructor(mw_data);  
}


/* remove the current tab from the main window if it is not the default tab
 */

void
on_close_tab_activate                  (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  GList * list;
  int count = 0;
  GtkWidget * notebook;
  Tab * tmp;
  MainWindow * mw_data = get_window_data_struct((GtkWidget*)menuitem);
  notebook = lookup_widget((GtkWidget*)menuitem, "MNotebook");
  if(notebook == NULL){
    g_printf("Notebook does not exist\n");
    return;
  }
  
  if(mw_data->tab == mw_data->current_tab){
    //    tmp = mw_data->current_tb;
    //    mw_data->tab = mw_data->current_tab->next;
    g_printf("The default TAB can not be deleted\n");
    return;
  }else{
    tmp = mw_data->tab;
    while(tmp != mw_data->current_tab){
      tmp = tmp->next;
      count++;      
    }
  }

  gtk_notebook_remove_page((GtkNotebook*)notebook, count);  
  list = gtk_container_get_children(GTK_CONTAINER(notebook));
  if(g_list_length(list)==1)
    gtk_notebook_set_show_tabs((GtkNotebook*)notebook, FALSE);
}


void
on_add_trace_activate                  (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  add_trace((GtkWidget*)menuitem, user_data);
}


void
on_remove_trace_activate               (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  remove_trace((GtkWidget*)menuitem, user_data);
}


void
on_save_activate                       (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  save((GtkWidget*)menuitem, user_data);
}


void
on_save_as_activate                    (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  save_as((GtkWidget*)menuitem, user_data);
}


void
on_quit_activate                       (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  gtk_main_quit ();
}


void
on_cut_activate                        (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  g_printf("Cut\n");
}


void
on_copy_activate                       (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  g_printf("Copye\n");
}


void
on_paste_activate                      (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  g_printf("Paste\n");
}


void
on_delete_activate                     (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  g_printf("Delete\n");
}


void
on_zoom_in_activate                    (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
   zoom_in((GtkWidget*)menuitem, user_data); 
}


void
on_zoom_out_activate                   (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
   zoom_out((GtkWidget*)menuitem, user_data); 
}


void
on_zoom_extended_activate              (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
   zoom_extended((GtkWidget*)menuitem, user_data); 
}


void
on_go_to_time_activate                 (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
   go_to_time((GtkWidget*)menuitem, user_data); 
}


void
on_show_time_frame_activate            (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
   show_time_frame((GtkWidget*)menuitem, user_data); 
}


void
on_move_viewer_up_activate             (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  move_up_viewer((GtkWidget*)menuitem, user_data);
}


void
on_move_viewer_down_activate           (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  move_down_viewer((GtkWidget*)menuitem, user_data);
}


void
on_remove_viewer_activate              (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  delete_viewer((GtkWidget*)menuitem, user_data);
}

void
on_trace_filter_activate              (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  MainWindow * mw_data = get_window_data_struct((GtkWidget*)menuitem);
  LttvTracesetSelector * s;
  GtkWidget * w = gtk_multi_vpaned_get_widget(mw_data->current_tab->multi_vpaned);
  
  s = g_object_get_data(G_OBJECT(w), "Traceset_Selector");
  if(!s){
    g_printf("There is no viewer yet\n");      
    return;
  }
  if(get_filter_selection(s, "Configure trace and tracefile filter", "Select traces and tracefiles")){
    //FIXME report filter change
    //update_traceset(mw_data);
    //call_pending_read_hooks(mw_data);
    //lttvwindow_report_current_time(mw_data,&(mw_data->current_tab->current_time));
  }
}

void
on_trace_facility_activate              (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  g_printf("Trace facility selector: %s\n");  
}


/* Dispaly a file selection dialogue to let user select a module, then call
 * lttv_module_load(), finally insert tool button and menu entry in the main window
 * for the loaded  module
 */

void
on_load_module_activate                (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  char ** dir;
  gint id;
  char str[PATH_LENGTH], *str1;
  MainWindow * mw_data = get_window_data_struct((GtkWidget*)menuitem);
  GtkFileSelection * file_selector = (GtkFileSelection *)gtk_file_selection_new("Select a module");
  if(remember_plugins_dir[0] != '\0')
    gtk_file_selection_set_filename(file_selector, remember_plugins_dir);
  gtk_file_selection_hide_fileop_buttons(file_selector);
  
  str[0] = '\0';
  id = gtk_dialog_run(GTK_DIALOG(file_selector));
  switch(id){
    case GTK_RESPONSE_ACCEPT:
    case GTK_RESPONSE_OK:
      dir = gtk_file_selection_get_selections (file_selector);
      strncpy(str,dir[0],PATH_LENGTH);
      strncpy(remember_plugins_dir,dir[0],PATH_LENGTH);
      str1 = strrchr(str,'/');
      if(str1)str1++;
      else{
	str1 = strrchr(str,'\\');
	str1++;
      }
      lttv_module_require(str1, NULL);
      g_slist_foreach(g_main_window_list, (gpointer)update_menu_toolbar_constructors,
          NULL);
      g_strfreev(dir);
    case GTK_RESPONSE_REJECT:
    case GTK_RESPONSE_CANCEL:
    default:
      gtk_widget_destroy((GtkWidget*)file_selector);
      break;
  }
  g_printf("Load module: %s\n", str);
}


/* Display all loaded modules, let user to select a module to unload
 * by calling lttv_module_unload
 */

void
on_unload_module_activate              (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  int i;
  GPtrArray *name;
  char *unload_module_name;
  guint nb;
  LttvLibrary *library;
  LttvLibraryInfo library_info;
  MainWindow * mw_data = get_window_data_struct((GtkWidget*)menuitem);
  
  name  = g_ptr_array_new();
  nb = lttv_library_number();

  for(i=0;i<nb;i++){
    library = lttv_library_get(i);
    lttv_library_info(library, &library_info);
    if(library_info.load_count > 0) g_ptr_array_add(name, library_info.name);
  }

  unload_module_name =get_unload_module((char **)(name->pdata), name->len);
  
  if(unload_module_name){
    for(i=0;i<nb;i++){
      library = lttv_library_get(i);
      lttv_library_info(library, &library_info);
      if(strcmp(unload_module_name, library_info.name) == 0){
	      lttv_library_unload(library);
        g_slist_foreach(g_main_window_list,
            (gpointer)update_menu_toolbar_constructors,
            NULL);
	break;
      }
    }    
  }

  g_ptr_array_free(name, TRUE);
}


/* Display a directory dialogue to let user select a path for module searching
 */

void
on_add_module_search_path_activate     (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  GtkDirSelection * file_selector = (GtkDirSelection *)gtk_dir_selection_new("Select module path");
  const char * dir;
  gint id;

  MainWindow * mw_data = get_window_data_struct((GtkWidget*)menuitem);
  if(remember_plugins_dir[0] != '\0')
    gtk_dir_selection_set_filename(file_selector, remember_plugins_dir);

  id = gtk_dialog_run(GTK_DIALOG(file_selector));
  switch(id){
    case GTK_RESPONSE_ACCEPT:
    case GTK_RESPONSE_OK:
      dir = gtk_dir_selection_get_dir (file_selector);
      strncpy(remember_plugins_dir,dir,PATH_LENGTH);
      strncat(remember_plugins_dir,"/",PATH_LENGTH);
      lttv_library_path_add(dir);
    case GTK_RESPONSE_REJECT:
    case GTK_RESPONSE_CANCEL:
    default:
      gtk_widget_destroy((GtkWidget*)file_selector);
      break;
  }
}


void
on_color_activate                      (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  g_printf("Color\n");
}


void
on_filter_activate                     (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  g_printf("Filter\n");
}


void
on_save_configuration_activate         (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  g_printf("Save configuration\n");
}


void
on_content_activate                    (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  g_printf("Content\n");
}


void
on_about_activate                      (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
  g_printf("About...\n");
}


void
on_button_new_clicked                  (GtkButton       *button,
                                        gpointer         user_data)
{
  create_new_window((GtkWidget*)button, user_data, TRUE);
}

void
on_button_new_tab_clicked              (GtkButton       *button,
                                        gpointer         user_data)
{
  create_new_tab((GtkWidget*)button, user_data);
}

void
on_button_open_clicked                 (GtkButton       *button,
                                        gpointer         user_data)
{
  open_traceset((GtkWidget*)button, user_data);
}


void
on_button_add_trace_clicked            (GtkButton       *button,
                                        gpointer         user_data)
{
  add_trace((GtkWidget*)button, user_data);
}


void
on_button_remove_trace_clicked         (GtkButton       *button,
                                        gpointer         user_data)
{
  remove_trace((GtkWidget*)button, user_data);
}


void
on_button_save_clicked                 (GtkButton       *button,
                                        gpointer         user_data)
{
  save((GtkWidget*)button, user_data);
}


void
on_button_save_as_clicked              (GtkButton       *button,
                                        gpointer         user_data)
{
  save_as((GtkWidget*)button, user_data);
}


void
on_button_zoom_in_clicked              (GtkButton       *button,
                                        gpointer         user_data)
{
   zoom_in((GtkWidget*)button, user_data); 
}


void
on_button_zoom_out_clicked             (GtkButton       *button,
                                        gpointer         user_data)
{
   zoom_out((GtkWidget*)button, user_data); 
}


void
on_button_zoom_extended_clicked        (GtkButton       *button,
                                        gpointer         user_data)
{
   zoom_extended((GtkWidget*)button, user_data); 
}


void
on_button_go_to_time_clicked           (GtkButton       *button,
                                        gpointer         user_data)
{
   go_to_time((GtkWidget*)button, user_data); 
}


void
on_button_show_time_frame_clicked      (GtkButton       *button,
                                        gpointer         user_data)
{
   show_time_frame((GtkWidget*)button, user_data); 
}


void
on_button_move_up_clicked              (GtkButton       *button,
                                        gpointer         user_data)
{
  move_up_viewer((GtkWidget*)button, user_data);
}


void
on_button_move_down_clicked            (GtkButton       *button,
                                        gpointer         user_data)
{
  move_down_viewer((GtkWidget*)button, user_data);
}


void
on_button_delete_viewer_clicked        (GtkButton       *button,
                                        gpointer         user_data)
{
  delete_viewer((GtkWidget*)button, user_data);
}

void
on_MWindow_destroy                     (GtkObject       *object,
                                        gpointer         user_data)
{
  MainWindow *Main_Window = get_window_data_struct((GtkWidget*)object);
  GtkWidget  *widget;
  Tab *tab = Main_Window->tab;
 
  g_printf("There are : %d windows\n",g_slist_length(g_main_window_list));

  g_win_count--;
  if(g_win_count == 0)
    gtk_main_quit ();
}

gboolean    
on_MWindow_configure                   (GtkWidget         *widget,
                                        GdkEventConfigure *event,
                                        gpointer           user_data)
{
  MainWindow * mw_data = get_window_data_struct((GtkWidget*)widget);
  float width = event->width;
  Tab * tab = mw_data->tab;
  TimeWindow time_win;
  double ratio;
  TimeInterval *time_span;
  LttTime time;
	
	// MD : removed time width modification upon resizing of the main window.
	// The viewers will redraw themselves completely, without time interval
	// modification.
/*  while(tab){
    if(mw_data->window_width){
      time_span = LTTV_TRACESET_CONTEXT(tab->traceset_info->traceset_context)->Time_Span ;
      time_win = tab->time_window;
      ratio = width / mw_data->window_width;
      tab->time_window.time_width = ltt_time_mul(time_win.time_width,ratio);
      time = ltt_time_sub(time_span->endTime, time_win.start_time);
      if(ltt_time_compare(time, tab->time_window.time_width) < 0){
	tab->time_window.time_width = time;
      }
    } 
    tab = tab->next;
  }

  mw_data->window_width = (int)width;
	*/
  return FALSE;
}

/* Set current tab
 */

void
on_MNotebook_switch_page               (GtkNotebook     *notebook,
                                        GtkNotebookPage *page,
                                        guint            page_num,
                                        gpointer         user_data)
{
  MainWindow * mw = get_window_data_struct((GtkWidget*)notebook);
  Tab * tab = mw->tab;
 
  while(page_num){
    tab = tab->next;
    page_num--;
  }
  mw->current_tab = tab;
}


/* callback function to check or uncheck the check box (filter)
 */

void checkbox_changed(GtkTreeView *treeview,
		      GtkTreePath *arg1,
		      GtkTreeViewColumn *arg2,
		      gpointer user_data)
{
  GtkTreeStore * store = (GtkTreeStore *)gtk_tree_view_get_model (treeview);
  GtkTreeIter iter;
  gboolean value;

  if (gtk_tree_model_get_iter ((GtkTreeModel *)store, &iter, arg1)){
    gtk_tree_model_get ((GtkTreeModel *)store, &iter, CHECKBOX_COLUMN, &value, -1);
    value = value? FALSE : TRUE;
    gtk_tree_store_set (GTK_TREE_STORE (store), &iter, CHECKBOX_COLUMN, value, -1);    
  }  
  
}


/* According to user's selection, update selector(filter)
 */

void update_filter(LttvTracesetSelector *s,  GtkTreeStore *store )
{
  GtkTreeIter iter, child_iter, child_iter1, child_iter2;
  int i, j, k, nb_eventtype;
  LttvTraceSelector     * trace;
  LttvTracefileSelector * tracefile;
  LttvEventtypeSelector * eventtype;
  gboolean value, value1, value2;

  if(gtk_tree_model_get_iter_first((GtkTreeModel*)store, &iter)){
    i = 0;
    do{
      trace = lttv_traceset_selector_trace_get(s, i);
      nb_eventtype = lttv_trace_selector_eventtype_number(trace);
      gtk_tree_model_get ((GtkTreeModel*)store, &iter, CHECKBOX_COLUMN, &value,-1);
      if(value){
	j = 0;
	if(gtk_tree_model_iter_children ((GtkTreeModel*)store, &child_iter, &iter)){
	  do{
	    if(j<1){//eventtype selector for trace
	      gtk_tree_model_get ((GtkTreeModel*)store, &child_iter, CHECKBOX_COLUMN, &value2,-1);
	      if(value2){
		k=0;
		if(gtk_tree_model_iter_children ((GtkTreeModel*)store, &child_iter1, &child_iter)){
		  do{
		    eventtype = lttv_trace_selector_eventtype_get(trace,k);
		    gtk_tree_model_get ((GtkTreeModel*)store, &child_iter1, CHECKBOX_COLUMN, &value2,-1);
		    lttv_eventtype_selector_set_selected(eventtype,value2);
		    k++;
		  }while(gtk_tree_model_iter_next((GtkTreeModel*)store, &child_iter1));
		}
	      }
	    }else{ //tracefile selector
	      tracefile = lttv_trace_selector_tracefile_get(trace, j - 1);
	      gtk_tree_model_get ((GtkTreeModel*)store, &child_iter, CHECKBOX_COLUMN, &value1,-1);
	      lttv_tracefile_selector_set_selected(tracefile,value1);
	      if(value1){
		gtk_tree_model_iter_children((GtkTreeModel*)store, &child_iter1, &child_iter); //eventtype selector
		gtk_tree_model_get ((GtkTreeModel*)store, &child_iter1, CHECKBOX_COLUMN, &value2,-1);
		if(value2){
		  k = 0;
		  if(gtk_tree_model_iter_children ((GtkTreeModel*)store, &child_iter2, &child_iter1)){
		    do{//eventtype selector for tracefile
		      eventtype = lttv_tracefile_selector_eventtype_get(tracefile,k);
		      gtk_tree_model_get ((GtkTreeModel*)store, &child_iter2, CHECKBOX_COLUMN, &value2,-1);
		      lttv_eventtype_selector_set_selected(eventtype,value2);
		      k++;
		    }while(gtk_tree_model_iter_next((GtkTreeModel*)store, &child_iter2));
		  }
		}
	      }
	    }
	    j++;
	  }while(gtk_tree_model_iter_next((GtkTreeModel*)store, &child_iter));
	}
      }
      lttv_trace_selector_set_selected(trace,value);
      i++;
    }while(gtk_tree_model_iter_next((GtkTreeModel*)store, &iter));
  }
}


/* Display a dialogue showing all eventtypes and traces, let user to select the interested
 * eventtypes, tracefiles and traces (filter)
 */

gboolean get_filter_selection(LttvTracesetSelector *s,char *title, char * column_title)
{
  GtkWidget         * dialogue;
  GtkTreeStore      * store;
  GtkWidget         * tree;
  GtkWidget         * scroll_win;
  GtkCellRenderer   * renderer;
  GtkTreeViewColumn * column;
  GtkTreeIter         iter, child_iter, child_iter1, child_iter2;
  int i, j, k, id, nb_trace, nb_tracefile, nb_eventtype;
  LttvTraceSelector     * trace;
  LttvTracefileSelector * tracefile;
  LttvEventtypeSelector * eventtype;
  char * name;
  gboolean checked;

  dialogue = gtk_dialog_new_with_buttons(title,
					 NULL,
					 GTK_DIALOG_MODAL,
					 GTK_STOCK_OK,GTK_RESPONSE_ACCEPT,
					 GTK_STOCK_CANCEL,GTK_RESPONSE_REJECT,
					 NULL); 
  gtk_window_set_default_size((GtkWindow*)dialogue, 300, 500);

  store = gtk_tree_store_new (TOTAL_COLUMNS, G_TYPE_BOOLEAN, G_TYPE_STRING);
  tree  = gtk_tree_view_new_with_model (GTK_TREE_MODEL (store));
  g_object_unref (G_OBJECT (store));
  g_signal_connect (G_OBJECT (tree), "row-activated",
		    G_CALLBACK (checkbox_changed),
  		    NULL);  


  renderer = gtk_cell_renderer_toggle_new ();
  gtk_cell_renderer_toggle_set_radio((GtkCellRendererToggle *)renderer, FALSE);

  g_object_set (G_OBJECT (renderer),"activatable", TRUE, NULL);

  column   = gtk_tree_view_column_new_with_attributes ("Checkbox",
				  		       renderer,
						       "active", CHECKBOX_COLUMN,
						       NULL);
  gtk_tree_view_column_set_alignment (column, 0.5);
  gtk_tree_view_column_set_fixed_width (column, 20);
  gtk_tree_view_append_column (GTK_TREE_VIEW (tree), column);

  renderer = gtk_cell_renderer_text_new ();
  column   = gtk_tree_view_column_new_with_attributes (column_title,
				  		       renderer,
						       "text", NAME_COLUMN,
						       NULL);
  gtk_tree_view_column_set_alignment (column, 0.0);
  gtk_tree_view_append_column (GTK_TREE_VIEW (tree), column);
  gtk_tree_view_set_headers_visible(GTK_TREE_VIEW (tree), FALSE);

  scroll_win = gtk_scrolled_window_new (NULL, NULL);
  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll_win), 
				 GTK_POLICY_AUTOMATIC,GTK_POLICY_AUTOMATIC);
  gtk_container_add (GTK_CONTAINER (scroll_win), tree);

  gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialogue)->vbox), scroll_win,TRUE, TRUE,0);

  gtk_widget_show(scroll_win);
  gtk_widget_show(tree);
  
  nb_trace = lttv_traceset_selector_trace_number(s);
  for(i=0;i<nb_trace;i++){
    trace = lttv_traceset_selector_trace_get(s, i);
    name  = lttv_trace_selector_get_name(trace);    
    gtk_tree_store_append (store, &iter, NULL);
    checked = lttv_trace_selector_get_selected(trace);
    gtk_tree_store_set (store, &iter, 
			CHECKBOX_COLUMN,checked,
			NAME_COLUMN,name,
			-1);

    gtk_tree_store_append (store, &child_iter, &iter);      
    gtk_tree_store_set (store, &child_iter, 
			CHECKBOX_COLUMN, checked,
			NAME_COLUMN,"eventtype",
			-1);
    
    nb_eventtype = lttv_trace_selector_eventtype_number(trace);
    for(j=0;j<nb_eventtype;j++){
      eventtype = lttv_trace_selector_eventtype_get(trace,j);
      name      = lttv_eventtype_selector_get_name(eventtype);    
      checked   = lttv_eventtype_selector_get_selected(eventtype);
      gtk_tree_store_append (store, &child_iter1, &child_iter);      
      gtk_tree_store_set (store, &child_iter1, 
			  CHECKBOX_COLUMN, checked,
			  NAME_COLUMN,name,
			  -1);
    }

    nb_tracefile = lttv_trace_selector_tracefile_number(trace);
    for(j=0;j<nb_tracefile;j++){
      tracefile = lttv_trace_selector_tracefile_get(trace, j);
      name      = lttv_tracefile_selector_get_name(tracefile);    
      gtk_tree_store_append (store, &child_iter, &iter);
      checked = lttv_tracefile_selector_get_selected(tracefile);
      gtk_tree_store_set (store, &child_iter, 
			  CHECKBOX_COLUMN, checked,
			  NAME_COLUMN,name,
			  -1);

      gtk_tree_store_append (store, &child_iter1, &child_iter);      
      gtk_tree_store_set (store, &child_iter1, 
			  CHECKBOX_COLUMN, checked,
			  NAME_COLUMN,"eventtype",
			  -1);
    
      for(k=0;k<nb_eventtype;k++){
	eventtype = lttv_tracefile_selector_eventtype_get(tracefile,k);
	name      = lttv_eventtype_selector_get_name(eventtype);    
	checked   = lttv_eventtype_selector_get_selected(eventtype);
	gtk_tree_store_append (store, &child_iter2, &child_iter1);      
	gtk_tree_store_set (store, &child_iter2, 
			    CHECKBOX_COLUMN, checked,
			    NAME_COLUMN,name,
			    -1);
      }
    }
  }

  id = gtk_dialog_run(GTK_DIALOG(dialogue));
  switch(id){
    case GTK_RESPONSE_ACCEPT:
    case GTK_RESPONSE_OK:
      update_filter(s, store);
      gtk_widget_destroy(dialogue);
      return TRUE;
    case GTK_RESPONSE_REJECT:
    case GTK_RESPONSE_CANCEL:
    default:
      gtk_widget_destroy(dialogue);
      break;
  }
  return FALSE;
}


/* Select a trace which will be removed from traceset
 */

char * get_remove_trace(char ** all_trace_name, int nb_trace)
{
  return get_selection(all_trace_name, nb_trace, 
		       "Select a trace", "Trace pathname");
}


/* Select a module which will be unloaded
 */

char * get_unload_module(char ** loaded_module_name, int nb_module)
{
  return get_selection(loaded_module_name, nb_module, 
		       "Select an unload module", "Module pathname");
}


/* Display a dialogue which shows all selectable items, let user to 
 * select one of them
 */

char * get_selection(char ** loaded_module_name, int nb_module,
		     char *title, char * column_title)
{
  GtkWidget         * dialogue;
  GtkWidget         * scroll_win;
  GtkWidget         * tree;
  GtkListStore      * store;
  GtkTreeViewColumn * column;
  GtkCellRenderer   * renderer;
  GtkTreeSelection  * select;
  GtkTreeIter         iter;
  gint                id, i;
  char              * unload_module_name = NULL;

  dialogue = gtk_dialog_new_with_buttons(title,
					 NULL,
					 GTK_DIALOG_MODAL,
					 GTK_STOCK_OK,GTK_RESPONSE_ACCEPT,
					 GTK_STOCK_CANCEL,GTK_RESPONSE_REJECT,
					 NULL); 
  gtk_window_set_default_size((GtkWindow*)dialogue, 500, 200);

  scroll_win = gtk_scrolled_window_new (NULL, NULL);
  gtk_widget_show ( scroll_win);
  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll_win), 
				 GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

  store = gtk_list_store_new (N_COLUMNS,G_TYPE_STRING);
  tree = gtk_tree_view_new_with_model(GTK_TREE_MODEL (store));
  gtk_widget_show ( tree);
  g_object_unref (G_OBJECT (store));
		
  renderer = gtk_cell_renderer_text_new ();
  column   = gtk_tree_view_column_new_with_attributes (column_title,
						     renderer,
						     "text", MODULE_COLUMN,
						     NULL);
  gtk_tree_view_column_set_alignment (column, 0.5);
  gtk_tree_view_column_set_fixed_width (column, 150);
  gtk_tree_view_append_column (GTK_TREE_VIEW (tree), column);

  select = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree));
  gtk_tree_selection_set_mode (select, GTK_SELECTION_SINGLE);

  gtk_container_add (GTK_CONTAINER (scroll_win), tree);  

  gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialogue)->vbox), scroll_win,TRUE, TRUE,0);

  for(i=0;i<nb_module;i++){
    gtk_list_store_append (store, &iter);
    gtk_list_store_set (store, &iter, MODULE_COLUMN,loaded_module_name[i],-1);
  }

  id = gtk_dialog_run(GTK_DIALOG(dialogue));
  switch(id){
    case GTK_RESPONSE_ACCEPT:
    case GTK_RESPONSE_OK:
      if (gtk_tree_selection_get_selected (select, (GtkTreeModel**)&store, &iter)){
	  gtk_tree_model_get ((GtkTreeModel*)store, &iter, MODULE_COLUMN, &unload_module_name, -1);
      }
    case GTK_RESPONSE_REJECT:
    case GTK_RESPONSE_CANCEL:
    default:
      gtk_widget_destroy(dialogue);
      break;
  }

  return unload_module_name;
}


/* Insert or remove all menu entry and tool buttons into all main windows
 * for modules.
 *
 * It adds them in a hash table as well, so it can keep track of which
 * menu entries and buttons are currently in each main window, for later
 * removal.
 */

void update_menu_toolbar_constructors(MainWindow * mw, gpointer user_data)
{
  int i;
  GdkPixbuf *pixbuf;
  lttvwindow_viewer_constructor constructor;
  LttvMenus * global_menu, * instance_menu;
  LttvToolbars * global_toolbar, * instance_toolbar;
  LttvMenuClosure *menu_item_i, *menu_item_j;
  LttvToolbarClosure *toolbar_item_i, *toolbar_item_j;
  LttvAttributeValue value;
  LttvIAttribute *global_attributes = LTTV_IATTRIBUTE(lttv_global_attributes());
  LttvIAttribute *attributes = LTTV_IATTRIBUTES(mw->attributes);
  GtkWidget * tool_menu_title_menu, *new_widget, *pixmap;

  g_assert(lttv_iattribute_find_by_path(global_attributes,
	   "viewers/menu", LTTV_POINTER, &value));
  if(*(value.v_pointer) == NULL)
    (LttvMenus*)*(value.v_pointer) = lttv_menus_new();
  global_menu = (LttvMenus*)*(value.v_pointer);

  g_assert(lttv_iattribute_find_by_path(attributes,
	   "viewers/menu", LTTV_POINTER, &value));
  if(*(value.v_pointer) == NULL)
    (LttvMenus*)*(value.v_pointer) = lttv_menus_new();
  instance_menu = (LttvMenus*)*(value.v_pointer);



  g_assert(lttv_iattribute_find_by_path(global_attributes,
	   "viewers/toolbar", LTTV_POINTER, &value));
  if(*(value.v_pointer) == NULL)
    (LttvToolbars*)*(value.v_pointer) = lttv_toolbars_new();
  global_toolbar = (LttvToolbars*)*(value.v_pointer);

  g_assert(lttv_iattribute_find_by_path(attributes,
	   "viewers/toolbar", LTTV_POINTER, &value));
  if(*(value.v_pointer) == NULL)
    (LttvToolbars*)*(value.v_pointer) = lttv_toolbars_new();
  instance_toolbar = (LttvToolbars*)*(value.v_pointer);

  /* Add missing menu entries to window instance */
  for(i=0;i<global_menu->len;i++) {
    menu_item_i = &g_array_index(global_menu, LttvMenuClosure, i);

    for(j=0;j<instance_menu->len;j++) {
      menu_item_j = &g_array_index(instance_menu, LttvMenuClosure, j);

      if(menu_item_i->con == menu_item_j->con)
        break;
    }
    if(j == instance_menu->len) /* not found */
    {
      //add menu_item_i to window instance;
      constructor = menu_item->con;
      tool_menu_title_menu = lookup_widget(mw->mwindow,"ToolMenuTitle_menu");
      new_widget =
              gtk_menu_item_new_with_mnemonic (menu_item_i->menuText);
      gtk_container_add (GTK_CONTAINER (tool_menu_title_menu),
              new_widget);
      g_signal_connect ((gpointer) new_widget, "activate",
                          G_CALLBACK (insert_viewer_wrap),
                          constructor);  
      gtk_widget_show (new_widget);
      lttv_menus_add(instance_menu, menu_item_i->con, 
                        menu_item_i->menu_path,
                        menu_item_i->menu_text,
                        new_widget);
    }

  }

  /* Remove missing menu entries from window instance */
  for(i=0;i<instance_menu->len;i++) {
    menu_item_i = &g_array_index(instance_menu, LttvMenuClosure, i);

    for(j=0;j<global_menu->len;j++) {
      menu_item_j = &g_array_index(global_menu, LttvMenuClosure, j);

      if(menu_item_i->con == menu_item_j->con)
        break;
    }
    if(j == global_menu->len) /* not found */
    {
      //remove menu_item_i from window instance;
      tool_menu_title_menu = lookup_widget(mw->mwindow,"ToolMenuTitle_menu");
      gtk_container_remove (GTK_CONTAINER (tool_menu_title_menu), 
                            menu_item_i->widget);
      lttv_menus_remove(instance_menu, menu_item_i->con);
    }
  }

  /* Add missing toolbar entries to window instance */
  for(i=0;i<global_toolbar->len;i++) {
    toolbar_item_i = &g_array_index(global_toolbar, LttvToolbarClosure, i);

    for(j=0;j<instance_toolbar->len;j++) {
      toolbar_item_j = &g_array_index(instance_toolbar, LttvToolbarClosure, j);

      if(toolbar_item_i->con == toolbar_item_j->con)
        break;
    }
    if(j == instance_toolbar->len) /* not found */
    {
      //add toolbar_item_i to window instance;
      constructor = toolbar_item->con;
      tool_menu_title_menu = lookup_widget(mw->mwindow,"MToolbar1");
      pixbuf = gdk_pixbuf_new_from_xpm_data((const char**)toolbar_item->pixmap);
      pixmap = gtk_image_new_from_pixbuf(pixbuf);
      new_widget =
         gtk_toolbar_append_element (GTK_TOOLBAR (tool_menu_title_menu),
            GTK_TOOLBAR_CHILD_BUTTON,
            NULL,
            "",
            toolbar_item->tooltip, NULL,
            pixmap, NULL, NULL);
      gtk_label_set_use_underline(
          GTK_LABEL (((GtkToolbarChild*) (
                           g_list_last (GTK_TOOLBAR 
                              (tool_menu_title_menu)->children)->data))->label),
          TRUE);
      gtk_container_set_border_width (GTK_CONTAINER (new_widget), 1);
      g_signal_connect ((gpointer) new_widget,
          "clicked",
          G_CALLBACK (insert_viewer_wrap),
          constructor);       
      gtk_widget_show (new_widget);
   
      lttv_toolbars_add(instance_toolbar, toolbar_item_i->con, 
                        toolbar_item_i->tooltip,
                        toolbar_item_i->pixmap,
                        new_widget);
 
    }
  }

  /* Remove missing toolbar entries from window instance */
  for(i=0;i<instance_toolbar->len;i++) {
    toolbar_item_i = &g_array_index(instance_toolbar, LttvToolbarClosure, i);

    for(j=0;j<global_toolbar->len;j++) {
      toolbar_item_j = &g_array_index(global_toolbar, LttvToolbarClosure, j);

      if(toolbar_item_i->con == toolbar_item_j->con)
        break;
    }
    if(j == global_toolbar->len) /* not found */
    {
      //remove toolbar_item_i from window instance;
      tool_menu_title_menu = lookup_widget(mw->mwindow,"ToolMenuTitle_menu");
      gtk_container_remove (GTK_CONTAINER (tool_menu_title_menu), 
                            toolbar_item_i->widget);
      lttv_toolbars_remove(instance_toolbar, toolbar_item_i->con);
    }
  }
}


/* Create a main window
 */

void construct_main_window(MainWindow * parent)
{
  g_debug("construct_main_window()");
  GtkWidget  * new_window; /* New generated main window */
  MainWindow * new_m_window;/* New main window structure */
  GtkNotebook * notebook;
  LttvIAttribute *attributes =
	  LTTV_IATTRIBUTE(g_object_new(LTTV_ATTRIBUTE_TYPE, NULL));
  LttvAttributeValue value;
         
  new_m_window = g_new(MainWindow, 1);

  // Add the object's information to the module's array 
  g_main_window_list = g_slist_append(g_main_window_list, new_m_window);


  new_window  = create_MWindow();
  gtk_widget_show (new_window);
    
  new_m_window->mwindow = new_window;
  new_m_window->tab = NULL;
  new_m_window->current_tab = NULL;
  new_m_window->attributes = attributes;

  g_assert(lttv_iattribute_find_by_path(attributes,
           "viewers/menu", LTTV_POINTER, &value));
  (LttvMenus*)*(value.v_pointer) = lttv_menus_new();

  g_assert(lttv_iattribute_find_by_path(attributes_global,
           "viewers/toolbar", LTTV_POINTER, &value));
  (LttvToolbars*)*(value.v_pointer) = lttv_toolbars_new();

  update_menu_toolbar_constructors(new_m_window, NULL);
  
  g_object_set_data(G_OBJECT(new_window), "mainWindow", (gpointer)new_m_window);    
  //create a default tab
  notebook = (GtkNotebook *)lookup_widget(new_m_window->mwindow, "MNotebook");
  if(notebook == NULL){
    g_printf("Notebook does not exist\n");
    return;
  }
  //for now there is no name field in LttvTraceset structure
  //Use "Traceset" as the label for the default tab
  create_tab(parent, new_m_window, notebook, "Traceset");

  g_object_set_data_full(
			G_OBJECT(new_m_window->mwindow),
			"Main_Window_Data",
			new_m_window,
			(GDestroyNotify)main_window_free);

  g_win_count++;
}


/* Free the memory occupied by a tab structure
 * destroy the tab
 */

void tab_destructor(Tab * tab_instance)
{
  int i, nb, ref_count;
  LttvTrace * trace;

  if(tab_instance->attributes)
    g_object_unref(tab_instance->attributes);  

  if(tab_instance->mw->tab == tab_instance){
    tab_instance->mw->tab = tab_instance->next;
  }else{
    Tab * tmp1, *tmp = tab_instance->mw->tab;
    while(tmp != tab_instance){
      tmp1 = tmp;
      tmp = tmp->next;
    }
    tmp1->next = tab_instance->next;
  }

  if(tab_instance->traceset_info->traceset_context != NULL){
    //remove state update hooks
    lttv_state_remove_event_hooks(
         (LttvTracesetState*)tab_instance->traceset_info->
                              traceset_context);
    lttv_context_fini(LTTV_TRACESET_CONTEXT(tab_instance->traceset_info->
					    traceset_context));
    g_object_unref(tab_instance->traceset_info->traceset_context);
  }
  if(tab_instance->traceset_info->traceset != NULL) {
    nb = lttv_traceset_number(tab_instance->traceset_info->traceset);
    for(i = 0 ; i < nb ; i++) {
      trace = lttv_traceset_get(tab_instance->traceset_info->traceset, i);
      ref_count = lttv_trace_get_ref_number(trace);
      if(ref_count <= 1){
	ltt_trace_close(lttv_trace(trace));
	lttv_trace_destroy(trace);
      }
      //      lttv_trace_destroy(trace);
    }
  }  
  lttv_traceset_destroy(tab_instance->traceset_info->traceset);
  g_array_free(tab_instance->time_requests, TRUE);
  g_free(tab_instance->traceset_info);
  g_free(tab_instance);
}


/* Create a tab and insert it into the current main window
 */

void * create_tab(MainWindow * parent, MainWindow* current_window, 
		  GtkNotebook * notebook, char * label)
{
  GList * list;
  Tab * tmp_tab;
  MainWindow * mw_data = current_window;
  LttTime tmp_time;
  
  //create a new tab data structure
  tmp_tab = mw_data->tab;
  while(tmp_tab && tmp_tab->next) tmp_tab = tmp_tab->next;
  if(!tmp_tab){
    mw_data->current_tab = NULL;
    tmp_tab = g_new(Tab,1);
    mw_data->tab = tmp_tab;    
  }else{
    tmp_tab->next = g_new(Tab,1);
    tmp_tab = tmp_tab->next;
  }

  //construct and initialize the traceset_info
  tmp_tab->traceset_info = g_new(TracesetInfo,1);
  if(parent){
    if(parent->current_tab){
      tmp_tab->traceset_info->traceset = 
                      lttv_traceset_new();
        //FIXME lttv_traceset_copy(parent->current_tab->traceset_info->traceset);
    }else{
      tmp_tab->traceset_info->traceset = lttv_traceset_new();
    }

  }else{  /* Initial window */
    if(mw_data->current_tab){
      tmp_tab->traceset_info->traceset = 
                      lttv_traceset_new();
        //FIXME lttv_traceset_copy(mw_data->current_tab->traceset_info->traceset);
    }else{
      tmp_tab->traceset_info->traceset = lttv_traceset_new();    
      /* Add the command line trace */
      if(g_init_trace != NULL){
	lttv_traceset_add(tmp_tab->traceset_info->traceset, g_init_trace);
      }
    }
  }
  
  //FIXME copy not implemented in lower level
  tmp_tab->traceset_info->traceset_context =
    g_object_new(LTTV_TRACESET_STATS_TYPE, NULL);
  g_assert(tmp_tab->traceset_info->traceset_context != NULL);
  lttv_context_init(
	    LTTV_TRACESET_CONTEXT(tmp_tab->traceset_info->traceset_context),
	                          tmp_tab->traceset_info->traceset);
  //add state update hooks
  lttv_state_add_event_hooks(
       (LttvTracesetState*)tmp_tab->traceset_info->traceset_context);
  
  //determine the current_time and time_window of the tab
  if(mw_data->current_tab){
    // Will have to read directly at the main window level, as we want
    // to be able to modify a traceset on the fly.
    tmp_tab->time_window      = mw_data->current_tab->time_window;
    tmp_tab->current_time     = mw_data->current_tab->current_time;
  }else{
    // Will have to read directly at the main window level, as we want
    // to be able to modify a traceset on the fly.
    // get_traceset_time_span(mw_data,&tmp_tab->traceStartTime, &tmp_tab->traceEndTime);
    tmp_tab->time_window.start_time   = 
	    LTTV_TRACESET_CONTEXT(tmp_tab->traceset_info->traceset_context)->Time_Span->startTime;
    if(DEFAULT_TIME_WIDTH_S <
              LTTV_TRACESET_CONTEXT(tmp_tab->traceset_info->traceset_context)->Time_Span->endTime.tv_sec)
      tmp_time.tv_sec = DEFAULT_TIME_WIDTH_S;
    else
      tmp_time.tv_sec =
              LTTV_TRACESET_CONTEXT(tmp_tab->traceset_info->traceset_context)->Time_Span->endTime.tv_sec;
    tmp_time.tv_nsec = 0;
    tmp_tab->time_window.time_width = tmp_time ;
    tmp_tab->current_time.tv_sec = 
       LTTV_TRACESET_CONTEXT(tmp_tab->traceset_info->traceset_context)->Time_Span->startTime.tv_sec;
    tmp_tab->current_time.tv_nsec = 
       LTTV_TRACESET_CONTEXT(tmp_tab->traceset_info->traceset_context)->Time_Span->startTime.tv_nsec;
  }
  /* Become the current tab */
  mw_data->current_tab = tmp_tab;

  tmp_tab->attributes = LTTV_IATTRIBUTE(g_object_new(LTTV_ATTRIBUTE_TYPE, NULL));
  tmp_tab->multi_vpaned = (GtkMultiVPaned*)gtk_multi_vpaned_new();
  tmp_tab->multi_vpaned->mw = mw_data;
  gtk_widget_show((GtkWidget*)tmp_tab->multi_vpaned);
  tmp_tab->next = NULL;    
  tmp_tab->mw   = mw_data;

  tmp_tab->label = gtk_label_new (label);
  gtk_widget_show (tmp_tab->label);

  tmp_tab->time_requests = g_array_new(FALSE, FALSE, sizeof(TimeRequest));
  tmp_tab->time_request_pending = FALSE;

  g_object_set_data_full(
           G_OBJECT(tmp_tab->multi_vpaned),
           "Tab_Info",
	   tmp_tab,
	   (GDestroyNotify)tab_destructor);

 //insert tab into notebook
  gtk_notebook_append_page(notebook, (GtkWidget*)tmp_tab->multi_vpaned, tmp_tab->label);  
  list = gtk_container_get_children(GTK_CONTAINER(notebook));
  gtk_notebook_set_current_page(notebook,g_list_length(list)-1);
  // always show : not if(g_list_length(list)>1)
  gtk_notebook_set_show_tabs(notebook, TRUE);
 
}

/**
 * Function to show each viewer in the current tab.
 * It will be called by main window, call show on each registered viewer,
 * will call process traceset and then it will
 * @param main_win the main window the viewer belongs to.
 */
//FIXME Only one time request maximum for now!
void show_viewer(MainWindow *main_win)
{
  LttvAttributeValue value;
  LttvHooks * tmp;
  int i;
  LttvTracesetContext * tsc = 
              (LttvTracesetContext*)main_win->current_tab->
                                      traceset_info->traceset_context;
  
  g_assert(lttv_iattribute_find_by_path(main_win->current_tab->attributes,
           "hooks/showviewer", LTTV_POINTER, &value));
  tmp = (LttvHooks*)*(value.v_pointer);
  if(tmp == NULL)
  {
    g_warning("The viewer(s) did not add any show hook");
    return;
  }

  
  // Call the show, where viewers add hooks to context and fill the
  // time and number of events requested it the time_requests GArray.
  lttv_hooks_call(tmp, NULL);

 
}


gboolean execute_time_requests(MainWindow * mw)
{
  call_pending_read_hooks(mw);

  return FALSE; // automatically removed from the list of event sources
}