update roadmap
[lttv.git] / ltt / branches / poly / lttv / modules / gui / detailedevents / events.c
index 3ae7bbd0afb2fc9acb829f3e66de775c3448e7eb..689930cd9669c77731f3eb6ca66ecff3d1f4e429 100644 (file)
@@ -49,6 +49,7 @@
 #include <glib.h>
 #include <gtk/gtk.h>
 #include <gdk/gdk.h>
+#include <gdk/gdkx.h>
 #include <string.h>
 
 #include <ltt/ltt.h>
@@ -64,6 +65,7 @@
 #include <lttv/print.h>
 #include <lttvwindow/lttvwindow.h>
 #include <lttvwindow/lttvwindowtraces.h>
+#include <lttvwindow/lttv_plugin_tab.h>
 
 #include "hGuiEventsInsert.xpm"
 
@@ -74,7 +76,8 @@
 #endif
 
 #define abs(a) (((a)<0)?(-a):(a))
-
+#define max(a,b) ((a)>(b)?(a):(b))
+#define min(a,b) ((a)<(b)?(a):(b))
 
 /** Array containing instanced objects. Used when module is unloaded */
 static GSList *g_event_viewer_data_list = NULL ;
@@ -91,6 +94,7 @@ typedef enum _ScrollDirection{
 typedef struct _EventViewerData {
 
   Tab * tab;
+  LttvPluginTab *ptab;
   LttvHooks  * event_hooks;
 
   /* previous value is used to determine if it is a page up/down or
@@ -127,14 +131,22 @@ typedef struct _EventViewerData {
   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 */
+
+  guint num_events;  /* Number of events processed */
+
 } EventViewerData ;
 
 /** hook functions for update time interval, current time ... */
@@ -147,9 +159,9 @@ 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);
+GtkWidget *h_gui_events(LttvPlugin *plugin);
 //! Event Viewer's constructor
-EventViewerData *gui_events(Tab *tab);
+EventViewerData *gui_events(LttvPluginTab *ptab);
 //! Event Viewer's destructor
 void gui_events_destructor(EventViewerData *event_viewer_data);
 void gui_events_free(EventViewerData *event_viewer_data);
@@ -173,6 +185,9 @@ 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 tree_v_scroll_handler (GtkWidget *widget, GdkEventScroll *event, gpointer data);
+static gboolean key_handler(GtkWidget *widget, GdkEventKey *event,
+    gpointer user_data);
 
 static gint redraw_notify(void *hook_data, void *call_data);
 
@@ -205,9 +220,10 @@ enum
  * @return The widget created.
  */
 GtkWidget *
-h_gui_events(Tab * tab)
+h_gui_events(LttvPlugin *plugin)
 {
-  EventViewerData* event_viewer_data = gui_events(tab) ;
+  LttvPluginTab *ptab = LTTV_PLUGIN_TAB(plugin);
+  EventViewerData* event_viewer_data = gui_events(ptab) ;
   if(event_viewer_data)
     return event_viewer_data->top_widget;
   else return NULL;
@@ -221,14 +237,15 @@ h_gui_events(Tab * tab)
  * @return The Event viewer data created.
  */
 EventViewerData *
-gui_events(Tab *tab)
+gui_events(LttvPluginTab *ptab)
 {
   LttTime end;
   GtkTreeViewColumn *column;
   GtkCellRenderer *renderer;
   EventViewerData* event_viewer_data = g_new(EventViewerData,1) ;
-
+  Tab *tab = ptab->tab;
   event_viewer_data->tab = tab;
+  event_viewer_data->ptab = ptab;
 
   LttvTracesetContext * tsc =
         lttvwindow_get_traceset_context(event_viewer_data->tab);
@@ -265,9 +282,12 @@ 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 (
@@ -304,6 +324,14 @@ 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);
+
+  g_signal_connect (G_OBJECT(event_viewer_data->tree_v), "scroll-event",
+      G_CALLBACK(tree_v_scroll_handler),
+      event_viewer_data);
+
   // Use on each column!
   //gtk_tree_view_column_set_sizing(event_viewer_data->tree_v,
   //GTK_TREE_VIEW_COLUMN_FIXED);
@@ -546,9 +574,9 @@ static void request_background_data(EventViewerData *event_viewer_data)
          * information. Happens when two viewers ask for it before servicing
          * starts.
          */
-        lttvwindowtraces_background_request_remove(trace, "state");
-        lttvwindowtraces_background_request_queue(trace,
-                                                  "state");
+        if(!lttvwindowtraces_background_request_find(trace, "state"))
+          lttvwindowtraces_background_request_queue(
+              main_window_get_widget(event_viewer_data->tab), trace, "state");
         lttvwindowtraces_background_notify_queue(event_viewer_data,
                                                  trace,
                                                  ltt_time_infinite,
@@ -632,7 +660,20 @@ void tree_v_get_cursor(EventViewerData *event_viewer_data)
 #endif //0
 }
 
-
+/* 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(guint32_before(event->time, evd->last_tree_update_time))
+    return TRUE;
+  else
+    return FALSE;
+}
 
 void tree_v_move_cursor_cb (GtkWidget *widget,
                             GtkMovementStep arg1,
@@ -659,8 +700,12 @@ void tree_v_move_cursor_cb (GtkWidget *widget,
   //indices = gtk_tree_path_get_indices(path);
   
   //value = gtk_adjustment_get_value(event_viewer_data->vadjust_c);
+  /* If events request pending, do nothing*/
+  if(lttvwindow_events_request_pending(event_viewer_data->tab)) return;
   
   /* If no prior position... */
+#if 0
   if(ltt_time_compare(
         lttv_traceset_context_position_get_time(
           event_viewer_data->currently_selected_position),
@@ -674,7 +719,7 @@ void tree_v_move_cursor_cb (GtkWidget *widget,
     return;
 
   }
-
+#endif //0
   
   g_debug("tree view move cursor : arg1 is %u and arg2 is %d",
       (guint)arg1, arg2);
@@ -693,17 +738,38 @@ void tree_v_move_cursor_cb (GtkWidget *widget,
           /* 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);
-        }
-      }
+                                       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;
+                                       if(event_viewer_data->pos->len > 0) {
+                                               path = gtk_tree_path_new_from_indices(
+                                                               max(0, event_viewer_data->pos->len - 1), -1);
+                                               if(path) {
+                                                       gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                                                                                                                                                        path, NULL, FALSE);
+                                                       gtk_tree_path_free(path);
+                                               }
+                                       }
+                               }
+                       } else {
+                               /* 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;
+                               if(event_viewer_data->pos->len > 0) {
+                                       path = gtk_tree_path_new_from_indices(
+                                                       max(0, event_viewer_data->pos->len - 1), -1);
+                                       if(path) {
+                                               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) {
@@ -717,17 +783,38 @@ void tree_v_move_cursor_cb (GtkWidget *widget,
           /* 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);
-        }
-      }
+                                       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;
+                                       if(event_viewer_data->pos->len > 0) {
+                                               path = gtk_tree_path_new_from_indices(
+                                                               0, -1);
+                                               if(path) {
+                                                       gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                                                                                                                                                        path, NULL, FALSE);
+                                                       gtk_tree_path_free(path);
+                                               }
+                                       }
+                               }
+                       } else {
+                               /* 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;
+                               if(event_viewer_data->pos->len > 0) {
+                                       path = gtk_tree_path_new_from_indices(
+                                                       0, -1);
+                                       if(path) {
+                                               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:
@@ -743,21 +830,38 @@ void tree_v_move_cursor_cb (GtkWidget *widget,
           /* 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);
-
-        }
-      }
-
+                                       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;
+                                       if(event_viewer_data->pos->len > 0) {
+                                               path = gtk_tree_path_new_from_indices(
+                                                               event_viewer_data->pos->len - 1, -1);
+                                               if(path) {
+                                                       gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                                                                                                                                                        path, NULL, FALSE);
+                                                       gtk_tree_path_free(path);
+                                               }
+                                       }
+                               }
+                       } else {
+                       /* 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;
+                               if(event_viewer_data->pos->len > 0) {
+                                       path = gtk_tree_path_new_from_indices(
+                                                       event_viewer_data->pos->len - 1, -1);
+                                       if(path) {
+                                               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) {
@@ -770,20 +874,38 @@ void tree_v_move_cursor_cb (GtkWidget *widget,
           /* 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);
-        }
-      }
-
+                                       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;
+                                       if(event_viewer_data->pos->len > 0) {
+                                               path = gtk_tree_path_new_from_indices(
+                                                               0, -1);
+                                               if(path) {
+                                                       gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                                                                                                                                                        path, NULL, FALSE);
+                                                       gtk_tree_path_free(path);
+                                               }
+                                       }
+                               }
+                       }       else {
+                               /* 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;
+                               if(event_viewer_data->pos->len > 0) {
+                                       path = gtk_tree_path_new_from_indices(
+                                                       0, -1);
+                                       if(path) {
+                                               gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                                                                                                                                                path, NULL, FALSE);
+                                               gtk_tree_path_free(path);
+                                       }
+                               }
+                       }
     }
     break;
   default:
@@ -911,6 +1033,27 @@ void tree_v_move_cursor_cb (GtkWidget *widget,
 #endif //0
 }
 
+
+gboolean tree_v_scroll_handler (GtkWidget *widget, GdkEventScroll *event, gpointer data)
+{
+       EventViewerData *event_viewer_data = (EventViewerData*) data;
+       Tab *tab = event_viewer_data->tab;
+
+       switch(event->direction) {
+               case GDK_SCROLL_UP:
+                       gtk_adjustment_set_value(event_viewer_data->vadjust_c,
+                               gtk_adjustment_get_value(event_viewer_data->vadjust_c) - 1);
+                       break;
+               case GDK_SCROLL_DOWN:
+                       gtk_adjustment_set_value(event_viewer_data->vadjust_c,
+                               gtk_adjustment_get_value(event_viewer_data->vadjust_c) + 1);
+                       break;
+               default:
+                       g_error("Only scroll up and down expected");
+       }
+       return TRUE;
+}
+
 void tree_v_cursor_changed_cb (GtkWidget *widget, gpointer data)
 {
   EventViewerData *event_viewer_data = (EventViewerData*) data;
@@ -924,17 +1067,24 @@ void tree_v_cursor_changed_cb (GtkWidget *widget, gpointer data)
 
   /* 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) {
+    if(event_viewer_data->pos->len > 0) {
+                       gtk_tree_view_get_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                                       &path, NULL);
+                       if(path) {
+                               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);
+                       }
+               }
+       }
 }
 
 
@@ -974,7 +1124,13 @@ 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
@@ -1002,7 +1158,12 @@ 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);
@@ -1030,6 +1191,13 @@ static __inline gint get_cell_height(GtkTreeView *TreeView)
   
   gtk_tree_view_column_cell_get_size(column, NULL, NULL, NULL, NULL, &height);
   
+  gint vertical_separator;
+  gtk_widget_style_get (GTK_WIDGET (TreeView),
+      "vertical-separator", &vertical_separator,
+      NULL);
+       
+       height += vertical_separator;
+
   return height;
 }
 
@@ -1104,11 +1272,16 @@ gboolean show_event_detail(void * hook_data, void * call_data)
 }
 #endif //0
 
-
-
-
-
-
+static gboolean events_check_handler(guint count, gboolean *stop_flag)
+{
+  if(count % CHECK_GDK_INTERVAL == 0) {
+    gtk_main_iteration_do(FALSE);
+    if(*stop_flag)
+      return TRUE;
+    else
+      return FALSE;
+  }
+}
 
 static void get_events(double new_value, EventViewerData *event_viewer_data)
 {
@@ -1119,8 +1292,14 @@ static void get_events(double new_value, EventViewerData *event_viewer_data)
   guint i;
   gboolean seek_by_time;
   
+  if(lttvwindow_preempt_count > 0) return;
+
   double value = new_value - event_viewer_data->previous_value;
 
+  /* Set stop button status for foreground processing */
+  event_viewer_data->tab->stop_foreground = FALSE;
+  lttvwindow_events_request_disable();
+  
   /* See where we have to scroll... */
   ScrollDirection direction;
   gint relative_position;
@@ -1180,13 +1359,27 @@ 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,
@@ -1205,8 +1398,9 @@ static void get_events(double new_value, EventViewerData *event_viewer_data)
    */
     if(relative_position > 0) {
       guint count;
-      count = lttv_process_traceset_seek_n_forward(tsc, relative_position,
-          event_viewer_data->main_win_filter);
+      count += lttv_process_traceset_seek_n_forward(tsc, relative_position,
+          event_viewer_data->main_win_filter, events_check_handler,
+          &event_viewer_data->tab->stop_foreground);
     } else if(relative_position < 0) {
       guint count;
       
@@ -1218,10 +1412,14 @@ static void get_events(double new_value, EventViewerData *event_viewer_data)
       LttTime time_diff = ltt_time_sub(last_event_time, first_event_time);
       if(ltt_time_compare(time_diff, ltt_time_zero) == 0)
         time_diff = seek_back_default_offset;
-      count = lttv_process_traceset_seek_n_backward(tsc, abs(relative_position),
+
+      count = lttv_process_traceset_seek_n_backward(tsc,
+          abs(relative_position),
           time_diff,
           (seek_time_fct)lttv_state_traceset_seek_time_closest,
-          event_viewer_data->main_win_filter);
+          event_viewer_data->main_win_filter,
+         events_check_handler,
+         &event_viewer_data->tab->stop_foreground);
     } /* else 0 : do nothing : we are already at the beginning position */
 
     lttv_traceset_context_position_destroy(pos);
@@ -1231,6 +1429,9 @@ 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);
@@ -1265,11 +1466,14 @@ static void get_events(double new_value, EventViewerData *event_viewer_data)
   /* Mathieu :
    * 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.
+   * scrolling. However, we call the gdk loop to get events periodically so the
+   * processing can be stopped.
    */
   
   lttv_process_traceset_begin(tsc,
       NULL, NULL, NULL, event_viewer_data->event_hooks, NULL);
+
+  event_viewer_data->num_events = 0;
   
   lttv_process_traceset_middle(tsc, ltt_time_infinite, G_MAXUINT, NULL);
   
@@ -1292,6 +1496,11 @@ 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));
+
+  lttvwindow_events_request_enable();
 
   return;
 }
@@ -1302,8 +1511,16 @@ int event_hook(void *hook_data, void *call_data)
 {
   EventViewerData *event_viewer_data = (EventViewerData*)hook_data;
   LttvTracefileContext *tfc = (LttvTracefileContext*)call_data;
+  LttvTracefileState *tfs = (LttvTracefileState*)call_data;
   LttEvent *e = ltt_tracefile_get_event(tfc->tf);
 
+  if(event_viewer_data->num_events % CHECK_GDK_INTERVAL == 0) {
+    gtk_main_iteration_do(FALSE);
+    if(event_viewer_data->tab->stop_foreground)
+      return TRUE;
+  }
+  event_viewer_data->num_events++;
+  
   LttvFilter *filter = event_viewer_data->main_win_filter;
   if(filter != NULL && filter->head != NULL)
     if(!lttv_filter_tree_parse(filter->head,e,tfc->tf,
@@ -1312,10 +1529,9 @@ int event_hook(void *hook_data, void *call_data)
 
   LttFacility *facility = ltt_event_facility(e);
   LttEventType *event_type = ltt_event_eventtype(e);
-  LttField *field = ltt_event_field(e);
   LttTime time = ltt_event_time(e);
 
-  guint cpu = ltt_tracefile_num(tfc->tf);
+  guint cpu = tfs->cpu;
   LttvTraceState *ts = (LttvTraceState*)tfc->t_context;
   LttvProcessState *process = ts->running_process[cpu];
   
@@ -1328,10 +1544,9 @@ int event_hook(void *hook_data, void *call_data)
 
   lttv_traceset_context_position_save(tfc->t_context->ts_context, pos);
 
-  if(field)
-    lttv_print_field(e, field, desc, TRUE);
+  lttv_event_to_string(e, desc, TRUE, TRUE, (LttvTracefileState*)tfc);
 
-  g_info("field : %s", desc->str);
+  g_info("detail : %s", desc->str);
   
   gtk_list_store_append (event_viewer_data->store_m, &iter);
   gtk_list_store_set (event_viewer_data->store_m, &iter,
@@ -1356,9 +1571,11 @@ int event_hook(void *hook_data, void *call_data)
           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(path) {
+             gtk_tree_view_set_cursor(GTK_TREE_VIEW(event_viewer_data->tree_v),
+                                  path, NULL, FALSE);
+         gtk_tree_path_free(path);
+                       }
     }
   }
   
@@ -1382,13 +1599,32 @@ static void event_update_selection(EventViewerData *event_viewer_data)
     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);
+                       if(path) {
+             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)
 {
@@ -1405,9 +1641,35 @@ 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);
   }
@@ -1415,6 +1677,7 @@ 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,
@@ -1425,9 +1688,10 @@ gboolean update_current_time(void * hook_data, void * call_data)
         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);
+    /* Simply update the current time : it is in the list */
+    event_update_selection(event_viewer_data);
   }
+  event_viewer_data->report_position = TRUE;
   
   return FALSE;
 }
@@ -1446,7 +1710,6 @@ 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,
@@ -1504,6 +1767,8 @@ gboolean traceset_changed(void * hook_data, void * call_data)
   get_events(event_viewer_data->vadjust_c->value, event_viewer_data);
   //  event_viewer_data->vadjust_c->value = 0;
 
+       request_background_data(event_viewer_data);
+       
   return FALSE;
 }
 
@@ -1526,6 +1791,7 @@ 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);
+  return 0;
 }
 
 void gui_events_free(EventViewerData *event_viewer_data)
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