add guint32_before and after
[lttv.git] / ltt / branches / poly / lttv / modules / gui / detailedevents / events.c
index 5a674589ecce0c30cad0439a17f4af9f0044c411..df3fc2170cb3e7b433087db1b55f7873d5819256 100644 (file)
@@ -1,5 +1,6 @@
 /* This file is part of the Linux Trace Toolkit viewer
  * Copyright (C) 2003-2004 Mathieu Desnoyers and XangXiu Yang
+ *               2005 Mathieu Desnoyers
  *
  * 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
@@ -35,6 +36,8 @@
  *
  * Authors : Mathieu Desnoyers and XangXiu Yang, June to December 2003
  *           Inspired from original LTT, made by Karim Yaghmour
+ *
+ *           Mostly rewritten by Mathieu Desnoyers, August 2005.
  */
 
 #ifdef HAVE_CONFIG_H
@@ -60,6 +63,7 @@
 #include <lttv/filter.h>
 #include <lttv/print.h>
 #include <lttvwindow/lttvwindow.h>
+#include <lttvwindow/lttvwindowtraces.h>
 
 #include "hGuiEventsInsert.xpm"
 
@@ -121,12 +125,22 @@ typedef struct _EventViewerData {
   gint num_visible_events;
   
   LttvTracesetContextPosition *currently_selected_position;
+  gboolean update_cursor; /* Speed optimisation : do not update cursor when 
+                             unnecessary */
+  gboolean report_position; /* do not report position when in current_time
+                               update */
 
   LttvTracesetContextPosition *first_event;  /* Time of the first event shown */
   LttvTracesetContextPosition *last_event;  /* Time of the first event shown */
 
+  LttvTracesetContextPosition *current_time_get_first; 
+
   LttvFilter *main_win_filter;
 
+  gint background_info_waiting;
+
+  guint32 last_tree_update_time; /* To filter out repeat keys */
+
 } EventViewerData ;
 
 /** hook functions for update time interval, current time ... */
@@ -136,6 +150,8 @@ gboolean update_current_position(void * hook_data, void * call_data);
 gboolean traceset_changed(void * hook_data, void * call_data);
 gboolean filter_changed(void * hook_data, void * call_data);
 
+static void request_background_data(EventViewerData *event_viewer_data);
+
 //! Event Viewer's constructor hook
 GtkWidget *h_gui_events(Tab *tab);
 //! Event Viewer's constructor
@@ -163,7 +179,10 @@ static void tree_v_size_request_cb (GtkWidget *widget,
 static void tree_v_cursor_changed_cb (GtkWidget *widget, gpointer data);
 static void tree_v_move_cursor_cb (GtkWidget *widget, GtkMovementStep arg1,
     gint arg2, gpointer data);
+static gboolean key_handler(GtkWidget *widget, GdkEventKey *event,
+    gpointer user_data);
 
+static gint redraw_notify(void *hook_data, void *call_data);
 
 static void get_events(double time, EventViewerData *event_viewer_data);
 
@@ -237,6 +256,9 @@ gui_events(Tab *tab)
                 traceset_changed,event_viewer_data);
   lttvwindow_register_filter_notify(tab,
                 filter_changed, event_viewer_data);
+  lttvwindow_register_redraw_notify(tab,
+                redraw_notify, event_viewer_data);
+  
 
   event_viewer_data->scroll_win = gtk_scrolled_window_new (NULL, NULL);
   gtk_widget_show (event_viewer_data->scroll_win);
@@ -251,7 +273,12 @@ gui_events(Tab *tab)
   event_viewer_data->last_event =
     lttv_traceset_context_position_new(tsc);
 
-  event_viewer_data->main_win_filter = NULL;
+  event_viewer_data->main_win_filter = lttvwindow_get_filter(tab);
+
+  event_viewer_data->update_cursor = TRUE;
+  event_viewer_data->report_position = TRUE;
+
+  event_viewer_data->last_tree_update_time = 0;
 
   /* Create a model for storing the data list */
   event_viewer_data->store_m = gtk_list_store_new (
@@ -288,6 +315,10 @@ gui_events(Tab *tab)
         G_CALLBACK (tree_v_move_cursor_cb),
         event_viewer_data);
 
+  g_signal_connect (G_OBJECT(event_viewer_data->tree_v), "key-press-event",
+      G_CALLBACK(key_handler),
+      event_viewer_data);
+
   // Use on each column!
   //gtk_tree_view_column_set_sizing(event_viewer_data->tree_v,
   //GTK_TREE_VIEW_COLUMN_FIXED);
@@ -418,6 +449,8 @@ gui_events(Tab *tab)
   gtk_box_pack_start(GTK_BOX(event_viewer_data->hbox_v),
       event_viewer_data->scroll_win, TRUE, TRUE, 0);
 
+  gtk_container_set_border_width(GTK_CONTAINER(event_viewer_data->hbox_v), 1);
+
   /* Create vertical scrollbar and pack it */
   event_viewer_data->vscroll_vc = gtk_vscrollbar_new(NULL);
   gtk_range_set_update_policy (GTK_RANGE(event_viewer_data->vscroll_vc),
@@ -476,12 +509,88 @@ gui_events(Tab *tab)
       event_viewer_data,
       (GDestroyNotify)gui_events_free);
   
+  event_viewer_data->background_info_waiting = 0;
+
+  request_background_data(event_viewer_data);
+  
 
   return event_viewer_data;
 }
 
 
 
+static gint background_ready(void *hook_data, void *call_data)
+{
+  EventViewerData *event_viewer_data = (EventViewerData *)hook_data;
+  LttvTrace *trace = (LttvTrace*)call_data;
+
+  event_viewer_data->background_info_waiting--;
+
+  if(event_viewer_data->background_info_waiting == 0) {
+    g_message("event viewer : background computation data ready.");
+
+    redraw_notify(event_viewer_data, NULL);
+  }
+
+  return 0;
+}
+
+
+static void request_background_data(EventViewerData *event_viewer_data)
+{
+  LttvTracesetContext * tsc =
+        lttvwindow_get_traceset_context(event_viewer_data->tab);
+  gint num_traces = lttv_traceset_number(tsc->ts);
+  gint i;
+  LttvTrace *trace;
+
+  LttvHooks *background_ready_hook = 
+    lttv_hooks_new();
+  lttv_hooks_add(background_ready_hook, background_ready, event_viewer_data,
+      LTTV_PRIO_DEFAULT);
+  event_viewer_data->background_info_waiting = 0;
+  
+  for(i=0;i<num_traces;i++) {
+    trace = lttv_traceset_get(tsc->ts, i);
+
+    if(lttvwindowtraces_get_ready(g_quark_from_string("state"),trace)==FALSE) {
+
+      if(lttvwindowtraces_get_in_progress(g_quark_from_string("state"),
+                                          trace) == FALSE) {
+        /* We first remove requests that could have been done for the same
+         * information. Happens when two viewers ask for it before servicing
+         * starts.
+         */
+        if(!lttvwindowtraces_background_request_find(trace, "state"))
+          lttvwindowtraces_background_request_queue(trace, "state");
+        lttvwindowtraces_background_notify_queue(event_viewer_data,
+                                                 trace,
+                                                 ltt_time_infinite,
+                                                 NULL,
+                                                 background_ready_hook);
+        event_viewer_data->background_info_waiting++;
+      } else { /* in progress */
+      
+        lttvwindowtraces_background_notify_current(event_viewer_data,
+                                                   trace,
+                                                   ltt_time_infinite,
+                                                   NULL,
+                                                   background_ready_hook);
+        event_viewer_data->background_info_waiting++;
+      }
+    } else {
+      /* Data ready. Be its nature, this viewer doesn't need to have
+       * its data ready hook called htere, because a background
+       * request is always linked with a redraw.
+       */
+    }
+    
+  }
+
+  lttv_hooks_destroy(background_ready_hook);
+
+}
+
 static gboolean
 header_size_allocate(GtkWidget *widget,
                         GtkAllocation *allocation,
@@ -538,6 +647,20 @@ void tree_v_get_cursor(EventViewerData *event_viewer_data)
 }
 
 
+/* Filter out the key repeats that come too fast */
+static gboolean key_handler(GtkWidget *widget, GdkEventKey *event,
+    gpointer user_data)
+{
+  EventViewerData *evd = (EventViewerData *)user_data;
+  g_debug("event time : %u , last time : %u", event->time,
+      evd->last_tree_update_time);
+  
+  if(event->time < evd->last_tree_update_time)
+    return TRUE;
+  else
+    return FALSE;
+}
 
 void tree_v_move_cursor_cb (GtkWidget *widget,
                             GtkMovementStep arg1,
@@ -550,23 +673,152 @@ void tree_v_move_cursor_cb (GtkWidget *widget,
   EventViewerData *event_viewer_data = (EventViewerData*)data;
   
   g_debug("move cursor cb");
-  gtk_tree_view_get_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
-                            &path, NULL);
-  if(path == NULL)
-  {
+  //gtk_tree_view_get_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+  //                          &path, NULL);
+  //if(path == NULL)
+  //{
     /* No prior cursor, put it at beginning of page
      * and let the execution do */
+  //  path = gtk_tree_path_new_from_indices(0, -1);
+  //  gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+  //                              path, NULL, FALSE);
+  //}
+
+  //indices = gtk_tree_path_get_indices(path);
+  
+  //value = gtk_adjustment_get_value(event_viewer_data->vadjust_c);
+  
+  /* If no prior position... */
+  if(ltt_time_compare(
+        lttv_traceset_context_position_get_time(
+          event_viewer_data->currently_selected_position),
+        ltt_time_infinite) == 0) {
+    
     path = gtk_tree_path_new_from_indices(0, -1);
     gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
                                 path, NULL, FALSE);
+
+    gtk_tree_path_free(path);
+    return;
+
   }
 
-  indices = gtk_tree_path_get_indices(path);
-  
-  value = gtk_adjustment_get_value(event_viewer_data->vadjust_c);
   
   g_debug("tree view move cursor : arg1 is %u and arg2 is %d",
       (guint)arg1, arg2);
+
+  switch(arg1) {
+  case GTK_MOVEMENT_DISPLAY_LINES:
+    if(arg2 == 1) {
+      /* Move one line down */
+      if(event_viewer_data->pos->len > 0) {
+        LttvTracesetContextPosition *end_pos = 
+          (LttvTracesetContextPosition*)g_ptr_array_index(
+                                             event_viewer_data->pos,
+                                             event_viewer_data->pos->len-1);
+        if(lttv_traceset_context_pos_pos_compare(end_pos, 
+              event_viewer_data->currently_selected_position) == 0) {
+          /* Must get down one event and select the last one */
+          gtk_tree_selection_unselect_all(gtk_tree_view_get_selection(
+                GTK_TREE_VIEW(event_viewer_data->tree_v)));
+          event_viewer_data->update_cursor = FALSE;
+          gtk_adjustment_set_value(event_viewer_data->vadjust_c,
+              gtk_adjustment_get_value(event_viewer_data->vadjust_c) + 1);
+          event_viewer_data->update_cursor = TRUE;
+          path = gtk_tree_path_new_from_indices(
+              event_viewer_data->pos->len - 1, -1);
+          gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                                   path, NULL, FALSE);
+          gtk_tree_path_free(path);
+        }
+      }
+
+    } else {
+      if(event_viewer_data->pos->len > 0) {
+        /* Move one line up */
+        LttvTracesetContextPosition *begin_pos = 
+          (LttvTracesetContextPosition*)g_ptr_array_index(
+                                             event_viewer_data->pos,
+                                             0);
+        if(lttv_traceset_context_pos_pos_compare(begin_pos, 
+              event_viewer_data->currently_selected_position) == 0) {
+          /* Must get up one event and select the first one */
+          gtk_tree_selection_unselect_all(gtk_tree_view_get_selection(
+                GTK_TREE_VIEW(event_viewer_data->tree_v)));
+          event_viewer_data->update_cursor = FALSE;
+          gtk_adjustment_set_value(event_viewer_data->vadjust_c,
+              gtk_adjustment_get_value(event_viewer_data->vadjust_c) - 1);
+          event_viewer_data->update_cursor = TRUE;
+          path = gtk_tree_path_new_from_indices(
+              0, -1);
+          gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                                   path, NULL, FALSE);
+          gtk_tree_path_free(path);
+        }
+      }
+    }
+    break;
+  case GTK_MOVEMENT_PAGES:
+    if(arg2 == 1) {
+      /* Move one page down */
+      if(event_viewer_data->pos->len > 0) {
+        LttvTracesetContextPosition *end_pos = 
+          (LttvTracesetContextPosition*)g_ptr_array_index(
+                                             event_viewer_data->pos,
+                                             event_viewer_data->pos->len-1);
+        if(lttv_traceset_context_pos_pos_compare(end_pos, 
+              event_viewer_data->currently_selected_position) == 0) {
+          /* Must get down one page and select the last one */
+          gtk_tree_selection_unselect_all(gtk_tree_view_get_selection(
+                GTK_TREE_VIEW(event_viewer_data->tree_v)));
+          
+          event_viewer_data->update_cursor = FALSE;
+          gtk_adjustment_set_value(event_viewer_data->vadjust_c,
+              gtk_adjustment_get_value(event_viewer_data->vadjust_c) + 2);
+          event_viewer_data->update_cursor = TRUE;
+
+          path = gtk_tree_path_new_from_indices(
+              event_viewer_data->pos->len - 1, -1);
+          gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                                   path, NULL, FALSE);
+          gtk_tree_path_free(path);
+
+        }
+      }
+
+    } else {
+      /* Move one page up */
+      if(event_viewer_data->pos->len > 0) {
+        LttvTracesetContextPosition *begin_pos = 
+          (LttvTracesetContextPosition*)g_ptr_array_index(
+                                             event_viewer_data->pos,
+                                             0);
+        if(lttv_traceset_context_pos_pos_compare(begin_pos, 
+              event_viewer_data->currently_selected_position) == 0) {
+          /* Must get up one page and select the first one */
+          gtk_tree_selection_unselect_all(gtk_tree_view_get_selection(
+                GTK_TREE_VIEW(event_viewer_data->tree_v)));
+          
+          event_viewer_data->update_cursor = FALSE;
+          gtk_adjustment_set_value(event_viewer_data->vadjust_c,
+              gtk_adjustment_get_value(event_viewer_data->vadjust_c) - 2);
+          event_viewer_data->update_cursor = TRUE;
+
+          path = gtk_tree_path_new_from_indices(
+              0, -1);
+          gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                                   path, NULL, FALSE);
+          gtk_tree_path_free(path);
+        }
+      }
+
+    }
+    break;
+  default:
+    break;
+  }
+
+  //gtk_tree_path_free(path);
   
 #if 0
   if(arg1 == GTK_MOVEMENT_DISPLAY_LINES)
@@ -685,7 +937,6 @@ void tree_v_move_cursor_cb (GtkWidget *widget,
     }
   }
 #endif //0
-  gtk_tree_path_free(path);
 }
 
 void tree_v_cursor_changed_cb (GtkWidget *widget, gpointer data)
@@ -699,21 +950,24 @@ void tree_v_cursor_changed_cb (GtkWidget *widget, gpointer data)
 
   g_debug("cursor changed cb");
 
-#if 0
   /* On cursor change, modify the currently selected event by calling
    * the right API function */
-  tree_v_get_cursor(event_viewer_data);
   
-  gtk_tree_view_get_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
-      &path, NULL);
-  if(gtk_tree_model_get_iter(model,&iter,path)){
-    gtk_tree_model_get(model, &iter, POSITION_COLUMN, &pos, -1);
-    lttvwindow_report_current_position(tab, pos);
-  }else{
-    g_warning("Can not get iter\n");
+  
+  if(event_viewer_data->report_position) {
+    gtk_tree_view_get_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+        &path, NULL);
+    if(gtk_tree_model_get_iter(model,&iter,path)){
+      gtk_tree_model_get(model, &iter, POSITION_COLUMN, &pos, -1);
+      
+      if(lttv_traceset_context_pos_pos_compare(pos, 
+            event_viewer_data->currently_selected_position) != 0)
+        lttvwindow_report_current_position(tab, pos);
+    }else{
+      g_warning("Can not get iter\n");
+    }
+    gtk_tree_path_free(path);
   }
-#endif //0
 }
 
 
@@ -753,7 +1007,13 @@ static void tree_selection_changed_cb (GtkTreeSelection *selection,
 #endif //0
 }
 
-
+#if 0
+static gint key_snooper(GtkWidget *grab_widget, GdkEventKey *event,
+    gpointer func_data)
+{
+  return TRUE;
+}
+#endif //0
 
 /* This callback may be recalled after a step up/down, but we don't want to lose
  * the exact position : what we do is that we only set the value if it has
@@ -781,7 +1041,12 @@ void v_scroll_cb (GtkAdjustment *adjustment, gpointer data)
   
   //LttTime old_time = event_viewer_data->first_event;
   
+
+  //gint snoop = gtk_key_snooper_install(key_snooper, NULL);
+  
   get_events(adjustment->value, event_viewer_data);
+
+  //gtk_key_snooper_remove(snoop);
 #if 0 
   LttTime time = ltt_time_sub(event_viewer_data->first_event,
                               tsc->time_span.start_time);
@@ -904,13 +1169,13 @@ static void get_events(double new_value, EventViewerData *event_viewer_data)
   ScrollDirection direction;
   gint relative_position;
   
-  if(value < 0.0) {
+  if(value < -0.8) {
     if(value >= -1.0) direction = SCROLL_STEP_UP;
     else {
       if(value >= -2.0) direction = SCROLL_PAGE_UP;
       else direction = SCROLL_JUMP;
     }
-  } else if(value > 0.0) {
+  } else if(value > 0.8) {
     if(value <= 1.0) direction = SCROLL_STEP_DOWN;
     else {
       if(value <= 2.0) direction = SCROLL_PAGE_DOWN;
@@ -959,13 +1224,27 @@ static void get_events(double new_value, EventViewerData *event_viewer_data)
     LttvTracesetContextPosition *pos =
         lttv_traceset_context_position_new(tsc);
     
-  /* Remember the beginning position */
+    /* Remember the beginning position */
     if(event_viewer_data->pos->len > 0) {
       LttvTracesetContextPosition *first_pos = 
-        (LttvTracesetContextPosition*)g_ptr_array_index(event_viewer_data->pos,
-                                                        0);
+        (LttvTracesetContextPosition*)g_ptr_array_index(
+                                                    event_viewer_data->pos,
+                                                    0);
       lttv_traceset_context_position_copy(pos, first_pos);
-      g_assert(lttv_process_traceset_seek_position(tsc, pos) == 0); 
+
+      if(relative_position >= 0) {
+        LttTime first_event_time = 
+            lttv_traceset_context_position_get_time(
+                              pos);
+        lttv_state_traceset_seek_time_closest((LttvTracesetState*)tsc,
+          first_event_time);
+        lttv_process_traceset_middle(tsc, ltt_time_infinite,
+                                   G_MAXUINT,
+                                   pos);
+       
+      } else if(relative_position < 0) {
+        g_assert(lttv_process_traceset_seek_position(tsc, pos) == 0); 
+      }
     } else {
       /* There is nothing in the list : simply seek to the time value. */
       lttv_state_traceset_seek_time_closest((LttvTracesetState*)tsc,
@@ -1010,6 +1289,9 @@ static void get_events(double new_value, EventViewerData *event_viewer_data)
     
     time = lttv_traceset_context_position_get_time(
                                             event_viewer_data->first_event);
+    //if(ltt_time_compare(time, tsc->time_span.end_time) > 0)
+    //  time = tsc->time_span.end_time;
+
     LttTime time_val = ltt_time_sub(time,
                         tsc->time_span.start_time);
     event_viewer_data->previous_value = ltt_time_to_double(time_val);
@@ -1042,12 +1324,10 @@ static void get_events(double new_value, EventViewerData *event_viewer_data)
   
 
   /* Mathieu :
-   * I make the choice not to use the mainwindow lttvwindow API here : it will
-   * be faster to read the events ourself from lttv_process_traceset_middle, as
-   * we are already at the right read position. It would be costier to use the
-   * seek time closest for nothing, as we only have few events to read. 
+   * I make the choice not to use the mainwindow lttvwindow API here : the idle
+   * loop might have a too low priority, and we want good update while
+   * scrolling.
    */
-  /* FIXME : use seek time closest and middle to have a good state. */
   
   lttv_process_traceset_begin(tsc,
       NULL, NULL, NULL, event_viewer_data->event_hooks, NULL);
@@ -1073,6 +1353,9 @@ static void get_events(double new_value, EventViewerData *event_viewer_data)
   //g_signal_emit_by_name(G_OBJECT (event_viewer_data->select_c),
   //    "changed");
   
+  event_viewer_data->last_tree_update_time = 
+    gdk_x11_get_server_time(
+        gtk_widget_get_parent_window(event_viewer_data->tree_v));
 
   return;
 }
@@ -1132,7 +1415,18 @@ int event_hook(void *hook_data, void *call_data)
   
   g_string_free(desc, TRUE);
 
-  if(event_viewer_data->pos->len >= event_viewer_data->num_visible_events)
+  if(event_viewer_data->update_cursor) {
+    if(lttv_traceset_context_pos_pos_compare(pos, 
+          event_viewer_data->currently_selected_position) == 0) {
+      GtkTreePath *path = gtk_tree_path_new_from_indices(
+                          event_viewer_data->pos->len - 1, -1);
+      gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                             path, NULL, FALSE);
+      gtk_tree_path_free(path);
+    }
+  }
+  
+  if(event_viewer_data->pos->len >= event_viewer_data->num_visible_events )
     return TRUE;
   else
     return FALSE;
@@ -1140,13 +1434,51 @@ int event_hook(void *hook_data, void *call_data)
 
 
 
+static void event_update_selection(EventViewerData *event_viewer_data)
+{
+  guint i;
+  GPtrArray *positions = event_viewer_data->pos;
+  g_info("event_update_selection");
+
+  for(i=0;i<positions->len;i++) {
+    LttvTracesetContextPosition *cur_pos = 
+      (LttvTracesetContextPosition*)g_ptr_array_index(positions, i);
+    if(lttv_traceset_context_pos_pos_compare(cur_pos, 
+          event_viewer_data->currently_selected_position) == 0) {
+      GtkTreePath *path = gtk_tree_path_new_from_indices(i, -1);
+      gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                             path, NULL, FALSE);
+      gtk_tree_path_free(path);
+    }
+  }
+}
+
+static int current_time_get_first_event_hook(void *hook_data, void *call_data)
+{
+  EventViewerData *event_viewer_data = (EventViewerData*)hook_data;
+  LttvTracefileContext *tfc = (LttvTracefileContext*)call_data;
+  LttEvent *e = ltt_tracefile_get_event(tfc->tf);
+
+  LttvFilter *filter = event_viewer_data->main_win_filter;
+  if(filter != NULL && filter->head != NULL)
+    if(!lttv_filter_tree_parse(filter->head,e,tfc->tf,
+          tfc->t_context->t,tfc))
+      return FALSE;
+
+  lttv_traceset_context_position_save(tfc->t_context->ts_context, 
+      event_viewer_data->current_time_get_first);
+  return TRUE;
+}
+
 
 gboolean update_current_time(void * hook_data, void * call_data)
 {
+  g_info("update_current_time");
   EventViewerData *event_viewer_data = (EventViewerData*) hook_data;
   const LttTime * current_time = (LttTime*)call_data;
   LttvTracesetContext * tsc =
         lttvwindow_get_traceset_context(event_viewer_data->tab);
+  GtkTreePath *path;
   
   /* If the currently selected event time != current time, set the first event
    * with this time as currently selected. */
@@ -1154,9 +1486,35 @@ gboolean update_current_time(void * hook_data, void * call_data)
       event_viewer_data->currently_selected_position);
   if(ltt_time_compare(pos_time, *current_time) != 0) {
     
-    lttv_process_traceset_seek_time(tsc, *current_time);
-    lttv_traceset_context_position_save(tsc,
-        event_viewer_data->currently_selected_position);
+    lttv_state_traceset_seek_time_closest((LttvTracesetState*)tsc,
+        *current_time);
+    lttv_process_traceset_middle(tsc, *current_time, G_MAXUINT,
+                                   NULL);
+
+    /* Get the first event that passes in the filter */
+    event_viewer_data->current_time_get_first =
+                lttv_traceset_context_position_new(tsc);
+    LttvHooks *hooks = lttv_hooks_new();
+    lttv_hooks_add(hooks,
+                   current_time_get_first_event_hook,
+                   event_viewer_data,
+                   LTTV_PRIO_DEFAULT);
+
+    lttv_process_traceset_begin(tsc,
+        NULL, NULL, NULL, hooks, NULL);
+    
+    lttv_process_traceset_middle(tsc, ltt_time_infinite, G_MAXUINT, NULL);
+    
+    lttv_process_traceset_end(tsc,
+        NULL, NULL, NULL, hooks, NULL);
+   
+    lttv_hooks_destroy(hooks);
+
+    lttv_traceset_context_position_copy(
+        event_viewer_data->currently_selected_position,
+        event_viewer_data->current_time_get_first);
+    lttv_traceset_context_position_destroy(
+        event_viewer_data->current_time_get_first);
     pos_time = lttv_traceset_context_position_get_time(
         event_viewer_data->currently_selected_position);
   }
@@ -1164,6 +1522,7 @@ gboolean update_current_time(void * hook_data, void * call_data)
   LttTime time = ltt_time_sub(pos_time, tsc->time_span.start_time);
   double new_value = ltt_time_to_double(time);
  
+  event_viewer_data->report_position = FALSE;
   /* Change the viewed area if does not match */
   if(lttv_traceset_context_pos_pos_compare(
         event_viewer_data->currently_selected_position,
@@ -1171,14 +1530,20 @@ gboolean update_current_time(void * hook_data, void * call_data)
     ||
      lttv_traceset_context_pos_pos_compare(
         event_viewer_data->currently_selected_position,
-        event_viewer_data->last_event) > 0)
+        event_viewer_data->last_event) > 0) {
     gtk_adjustment_set_value(event_viewer_data->vadjust_c, new_value);
+  } else {
+    /* Simply update the current time : it is in the list */
+    event_update_selection(event_viewer_data);
+  }
+  event_viewer_data->report_position = TRUE;
+  
   return FALSE;
 }
 
 gboolean update_current_position(void * hook_data, void * call_data)
 {
+  g_info("update_current_position");
   EventViewerData *event_viewer_data = (EventViewerData*) hook_data;
   const LttvTracesetContextPosition *current_pos =
     (LttvTracesetContextPosition*)call_data;
@@ -1190,7 +1555,6 @@ gboolean update_current_position(void * hook_data, void * call_data)
     lttv_traceset_context_position_copy(
         event_viewer_data->currently_selected_position, current_pos);
 
-  
     /* Change the viewed area if does not match */
     if(lttv_traceset_context_pos_pos_compare(
           event_viewer_data->currently_selected_position,
@@ -1203,6 +1567,9 @@ gboolean update_current_position(void * hook_data, void * call_data)
       time = ltt_time_sub(time, tsc->time_span.start_time);
       double new_value = ltt_time_to_double(time);
       gtk_adjustment_set_value(event_viewer_data->vadjust_c, new_value);
+    } else {
+      /* Simply update the current time : it is in the list */
+      event_update_selection(event_viewer_data);
     }
 
   }
@@ -1226,7 +1593,23 @@ gboolean traceset_changed(void * hook_data, void * call_data)
 
   end = ltt_time_sub(time_span.end_time, time_span.start_time);
   event_viewer_data->vadjust_c->upper = ltt_time_to_double(end);
-  g_signal_emit_by_name(event_viewer_data->vadjust_c, "value-changed");
+
+  /* Reset the positions */
+  lttv_traceset_context_position_destroy(
+      event_viewer_data->currently_selected_position);
+  lttv_traceset_context_position_destroy(
+      event_viewer_data->first_event);
+  lttv_traceset_context_position_destroy(
+      event_viewer_data->last_event);
+  event_viewer_data->currently_selected_position =
+    lttv_traceset_context_position_new(tsc);
+  event_viewer_data->first_event =
+    lttv_traceset_context_position_new(tsc);
+  event_viewer_data->last_event =
+    lttv_traceset_context_position_new(tsc);
+
+  get_events(event_viewer_data->vadjust_c->value, event_viewer_data);
   //  event_viewer_data->vadjust_c->value = 0;
 
   return FALSE;
@@ -1240,14 +1623,18 @@ gboolean filter_changed(void * hook_data, void * call_data)
 
   event_viewer_data->main_win_filter = 
     (LttvFilter*)call_data;
-  g_signal_emit_by_name(event_viewer_data->vadjust_c, "value-changed");
+  get_events(event_viewer_data->vadjust_c->value, event_viewer_data);
 
   return FALSE;
 }
 
 
+gint redraw_notify(void *hook_data, void *call_data)
+{
+  EventViewerData *event_viewer_data = (EventViewerData*) hook_data;
 
-
+  get_events(event_viewer_data->vadjust_c->value, event_viewer_data);
+}
 
 void gui_events_free(EventViewerData *event_viewer_data)
 {
@@ -1282,6 +1669,10 @@ void gui_events_free(EventViewerData *event_viewer_data)
                         traceset_changed, event_viewer_data);
     lttvwindow_unregister_filter_notify(tab,
                         filter_changed, event_viewer_data);
+    lttvwindow_unregister_redraw_notify(tab,
+                redraw_notify, event_viewer_data);
+
+    lttvwindowtraces_background_notify_remove(event_viewer_data);
 
     g_event_viewer_data_list = g_slist_remove(g_event_viewer_data_list,
         event_viewer_data);
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