last changes
authorcompudj <compudj@04897980-b3bd-0310-b5e0-8ef037075253>
Mon, 4 Aug 2003 19:49:54 +0000 (19:49 +0000)
committercompudj <compudj@04897980-b3bd-0310-b5e0-8ef037075253>
Mon, 4 Aug 2003 19:49:54 +0000 (19:49 +0000)
git-svn-id: http://ltt.polymtl.ca/svn@160 04897980-b3bd-0310-b5e0-8ef037075253

ltt/branches/poly/lttv/modules/guiControlFlow.c

index b92359d30bce81eca4b3a37171f8fc81c6e3a12e..fb6233304ca6be00a9db11f7ee5edb6085bac515 100644 (file)
 #include <time.h>
 typedef time_t ltt_time;
 
+typedef struct _ltt_time_interval
+{
+       ltt_time time_begin, time_end;
+} ltt_time_interval;
+
+
+/*****************************************************************************
+ *                         Definition of structures                          *
+ *****************************************************************************/
+
 typedef struct _DrawingAreaInfo {
 
        guint height, width;
@@ -43,25 +53,30 @@ typedef struct _DrawingAreaInfo {
 typedef struct _ControlFlowData {
 
        GtkWidget *Drawing_Area_V;
-       GtkWidget *Drawing_Scrolled_Window_VC;
-       GtkAdjustment *VAdjust_Draw_C;
+       GtkWidget *Scrolled_Window_VC;
        
        GtkWidget *Process_List_VC;
-       GtkWidget *Process_Scrolled_Window_VC;
        
   /* Model containing list data */
        GtkListStore *Store_M;
        
        GtkWidget *HBox_V;
+       GtkWidget *Inside_HBox_V;
 
   GtkAdjustment *VAdjust_C ;
        
+       /* Trace information */
+       TraceSet *Trace_Set;
+       TraceStatistics *Trace_Statistics;
+       
+       /* Shown events information */
        guint First_Event, Last_Event;
-       ltt_time Begin_time, End_Time;
+       ltt_time Begin_Time, End_Time;
+       
        
        /* Drawing Area Info */
        DrawingAreaInfo Drawing_Area_Info;
-       
+
        /* TEST DATA, TO BE READ FROM THE TRACE */
        gint Number_Of_Events ;
        guint Currently_Selected_Event  ;
@@ -70,11 +85,29 @@ typedef struct _ControlFlowData {
 
 } ControlFlowData ;
 
+/* Structure used to store and use information relative to one events refresh
+ * request. Typically filled in by the expose event callback, then passed to the
+ * library call, then used by the drawing hooks. Then, once all the events are
+ * sent, it is freed by the hook called after the reading.
+ */
+typedef struct _EventRequest
+{
+       ControlFlowData *Control_Flow_Data;
+       ltt_time time_begin, time_end;
+       /* Fill the Events_Context during the initial expose, before calling for
+        * events.
+        */
+       GArray Events_Context; //FIXME
+} EventRequest ;
+
 
 /** Array containing instanced objects. Used when module is unloaded */
 static GSList *sControl_Flow_Data_List = NULL ;
 
 
+/*****************************************************************************
+ *                         Function prototypes                               *
+ *****************************************************************************/
 //! Control Flow Viewer's constructor hook
 GtkWidget *hGuiControlFlow(GtkWidget *pmParentWindow);
 //! Control Flow Viewer's constructor
@@ -85,6 +118,16 @@ void GuiControlFlow_Destructor(ControlFlowData *Control_Flow_Data);
 
 static int Event_Selected_Hook(void *hook_data, void *call_data);
 
+static lttv_hooks
+       *Draw_Before_Hooks,
+       *Draw_Event_Hooks,
+       *Draw_After_Hooks;
+
+Draw_Before_Hook(void *hook_data, void *call_data)
+Draw_Event_Hook(void *hook_data, void *call_data)
+Draw_After_Hook(void *hook_data, void *call_data)
+
+
 //void Tree_V_set_cursor(ControlFlowData *Control_Flow_Data);
 //void Tree_V_get_cursor(ControlFlowData *Control_Flow_Data);
 
@@ -110,7 +153,9 @@ void Drawing_Area_Init(ControlFlowData *Control_Flow_Data);
 
 
 
-
+/*****************************************************************************
+ *                 Functions for module loading/unloading                    *
+ *****************************************************************************/
 /**
  * plugin's init function
  *
@@ -126,6 +171,15 @@ G_MODULE_EXPORT void init() {
        /* Register the menu item insert entry */
        //MenuItemReg("/", "Insert Control Flow Viewer", guiEvent);
 
+       /* Setup the hooks */
+       Draw_Before_Hooks = lttv_hooks_new();
+       Draw_Event_Hooks = lttv_hooks_new();
+       Draw_After_Hooks = lttv_hooks_new();
+       
+       lttv_hooks_add(Draw_Before_Hooks, Draw_Before_Hook, NULL);
+       lttv_hooks_add(Draw_Event_Hooks, Draw_Event_Hook, NULL);
+       lttv_hooks_add(Draw_After_Hooks, Draw_After_Hook, NULL);
+       
 }
 
 void destroy_walk(gpointer data, gpointer user_data)
@@ -151,6 +205,10 @@ G_MODULE_EXPORT void destroy() {
 
        g_slist_foreach(sControl_Flow_Data_List, destroy_walk, NULL );
        
+       lttv_hooks_destroy(Draw_Before_Hooks);
+       lttv_hooks_destroy(Draw_Event_Hooks);
+       lttv_hooks_destroy(Draw_After_Hooks);
+       
        /* Unregister the toolbar insert button */
        //ToolbarItemUnreg(hGuiEvents);
 
@@ -158,23 +216,10 @@ G_MODULE_EXPORT void destroy() {
        //MenuItemUnreg(hGuiEvents);
 }
 
-/**
- * Event Viewer's constructor hook
- *
- * This constructor is given as a parameter to the menuitem and toolbar button
- * registration. It creates the list.
- * @param pmParentWindow A pointer to the parent window.
- * @return The widget created.
- */
-GtkWidget *
-hGuiControlFlow(GtkWidget *pmParentWindow)
-{
-       ControlFlowData* Control_Flow_Data = GuiControlFlow() ;
-
-       return Control_Flow_Data->HBox_V ;
-       
-}
 
+/*****************************************************************************
+ *                     Control Flow Viewer class implementation              *
+ *****************************************************************************/
 
 
 /* Enumeration of the columns */
@@ -204,6 +249,7 @@ GuiControlFlow(void)
        ControlFlowData* Control_Flow_Data = g_new(ControlFlowData,1) ;
        Control_Flow_Data->Drawing_Area_V = gtk_drawing_area_new ();
 
+       
        /* TEST DATA, TO BE READ FROM THE TRACE */
        Control_Flow_Data->Number_Of_Events = 1000 ;
        Control_Flow_Data->Currently_Selected_Event = FALSE  ;
@@ -239,130 +285,108 @@ GuiControlFlow(void)
 
 
 
-       /* Create the two scrolled windows with the same adjustment */
-       Control_Flow_Data->Process_Scrolled_Window_VC = gtk_scrolled_window_new(NULL, NULL);
-
-       Control_Flow_Data->VAdjust_C = gtk_scrolled_window_get_vadjustment(
-                                                                               GTK_SCROLLED_WINDOW(Control_Flow_Data->Process_Scrolled_Window_VC));
+       Control_Flow_Data->Inside_HBox_V = gtk_hbox_new(0, 0);
 
-       gtk_scrolled_window_set_policy(
-                       GTK_SCROLLED_WINDOW(Control_Flow_Data->Process_Scrolled_Window_VC),
-                       GTK_POLICY_NEVER,
-               //      GTK_POLICY_NEVER);
-                       GTK_POLICY_AUTOMATIC);
-       
+       gtk_box_pack_start(GTK_BOX(Control_Flow_Data->Inside_HBox_V), Control_Flow_Data->Process_List_VC, FALSE, TRUE, 0);
+       gtk_box_pack_start(GTK_BOX(Control_Flow_Data->Inside_HBox_V), Control_Flow_Data->Drawing_Area_V, TRUE, TRUE, 0);
 
 
-       Control_Flow_Data->Drawing_Scrolled_Window_VC = gtk_scrolled_window_new(NULL,Control_Flow_Data->VAdjust_C);
-       //Control_Flow_Data->Drawing_Scrolled_Window_VC = gtk_scrolled_window_new(NULL,NULL);
-       gtk_scrolled_window_set_policy(
-                       GTK_SCROLLED_WINDOW(Control_Flow_Data->Drawing_Scrolled_Window_VC),
-                       GTK_POLICY_NEVER,
-               //      GTK_POLICY_NEVER);
-                       GTK_POLICY_AUTOMATIC);
+       Control_Flow_Data->VAdjust_C = GTK_ADJUSTMENT(gtk_adjustment_new(0.0,   /* Value */
+                                                                                                                                                                                                               0.0,    /* Lower */
+                                                                                                                                                                                                               0.0,    /* Upper */
+                                                                                                                                                                                                               0.0,                    /* Step inc. */
+                                                                                                                                                                                                               0.0,                    /* Page inc. */
+                                                                                                                                                                                                               0.0     ));     /* page size */
        
-       Control_Flow_Data->VAdjust_Draw_C = gtk_scrolled_window_get_vadjustment(
-                                                                               GTK_SCROLLED_WINDOW(Control_Flow_Data->Drawing_Scrolled_Window_VC));
-
-       gtk_container_add(GTK_CONTAINER(Control_Flow_Data->Process_Scrolled_Window_VC),
-                                                       Control_Flow_Data->Process_List_VC);
-
 
-       gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(Control_Flow_Data->Drawing_Scrolled_Window_VC),
-                                                       Control_Flow_Data->Drawing_Area_V);
+       Control_Flow_Data->Scrolled_Window_VC = gtk_scrolled_window_new (NULL,
+                                                                                                                                                                               Control_Flow_Data->VAdjust_C);
+       gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(Control_Flow_Data->Scrolled_Window_VC) ,
+                                                                                                                                       GTK_POLICY_NEVER,
+                                                                                                                                       GTK_POLICY_AUTOMATIC);
 
+       gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(Control_Flow_Data->Scrolled_Window_VC),
+                                                                               Control_Flow_Data->Inside_HBox_V);
        
-       Control_Flow_Data->HBox_V = gtk_hbox_new(0, 0);
-
-
-
        
-       /* Pack the list and the drawing area in the hbox */
-
-       gtk_box_pack_start(GTK_BOX(Control_Flow_Data->HBox_V), Control_Flow_Data->Process_Scrolled_Window_VC, TRUE, TRUE, 0);
-       gtk_box_pack_start(GTK_BOX(Control_Flow_Data->HBox_V), Control_Flow_Data->Drawing_Scrolled_Window_VC, TRUE, TRUE, 0);
-
-
        g_signal_connect (G_OBJECT (Control_Flow_Data->Drawing_Area_V), "expose_event",  
                          G_CALLBACK (expose_event_cb), Control_Flow_Data);
 
 
        
-#ifdef DEBUG
-       g_signal_connect (G_OBJECT (drawing_area), "expose_event",
-                          G_CALLBACK (expose_event_callback), Control_Flow_Data);
-
-
-
-  Control_Flow_Data->VAdjust_C = gtk_range_get_adjustment(GTK_RANGE(Control_Flow_Data->VScroll_VC));
-
        g_signal_connect (G_OBJECT (Control_Flow_Data->VAdjust_C), "value-changed",
                          G_CALLBACK (v_scroll_cb),
                          Control_Flow_Data);
-       /* Set the upper bound to the last event number */
-       Control_Flow_Data->VAdjust_C->lower = 0;
-       Control_Flow_Data->VAdjust_C->upper = Control_Flow_Data->Number_Of_Events;
-       Control_Flow_Data->VAdjust_C->value = 0;
-       Control_Flow_Data->VAdjust_C->step_increment = 1;
-       Control_Flow_Data->VAdjust_C->page_increment = 
-                                Control_Flow_Data->VTree_Adjust_C->upper;
-       Control_Flow_Data->VAdjust_C->page_size =
-                                Control_Flow_Data->VTree_Adjust_C->upper;
-       g_critical("value : %u",Control_Flow_Data->VTree_Adjust_C->upper);
-
-
 
+       add_test_process(Control_Flow_Data);
 
-       /* Add the object's information to the module's array */
-  g_slist_append(sControl_Flow_Data_List, Control_Flow_Data);
-
-       Control_Flow_Data->First_Event = -1 ;
-       Control_Flow_Data->Last_Event = 0 ;
 
-       Control_Flow_Data->Num_Visible_Events = 1;
 
-       /* Test data */
-       get_test_data((int)Control_Flow_Data->VAdjust_C->value,
-                                                                        Control_Flow_Data->Num_Visible_Events, 
-                                                                        Control_Flow_Data);
+       /* Set the size of the drawing area */
+       Drawing_Area_Init(Control_Flow_Data);
 
-       /* Set the Selected Event */
-       //Tree_V_set_cursor(Control_Flow_Data);
-#endif //DEBUG 
+       /* Get trace statistics */
+       Control_Flow_Data->Trace_Statistics = get_trace_statistics(Trace);
 
 
-       g_signal_connect (G_OBJECT (Control_Flow_Data->VAdjust_C), "value-changed",
-                         G_CALLBACK (v_scroll_cb),
-                         Control_Flow_Data);
-       g_signal_connect (G_OBJECT (Control_Flow_Data->VAdjust_Draw_C), "value-changed",
-                         G_CALLBACK (v_scroll_cb),
-                         Control_Flow_Data);
+       gtk_widget_show(Control_Flow_Data->Drawing_Area_V);
+       gtk_widget_show(Control_Flow_Data->Process_List_VC);
+       gtk_widget_show(Control_Flow_Data->Inside_HBox_V);
+       gtk_widget_show(Control_Flow_Data->Scrolled_Window_VC);
 
+       test_draw(Control_Flow_Data);
 
+       return Control_Flow_Data;
 
+}
 
-       add_test_process(Control_Flow_Data);
+void
+GuiControlFlow_Destructor(ControlFlowData *Control_Flow_Data)
+{
+       guint index;
 
+       /* May already been done by GTK window closing */
+       if(GTK_IS_WIDGET(Control_Flow_Data->HBox_V))
+               gtk_widget_destroy(Control_Flow_Data->HBox_V);
+       
+       /* Destroy the Tree View */
+       //gtk_widget_destroy(Control_Flow_Data->Tree_V);
+       
+  /*  Clear raw event list */
+       //gtk_list_store_clear(Control_Flow_Data->Store_M);
+       //gtk_widget_destroy(GTK_WIDGET(Control_Flow_Data->Store_M));
 
+       g_slist_remove(sControl_Flow_Data_List,Control_Flow_Data);
+}
 
-       /* Set the size of the drawing area */
-       Drawing_Area_Init(Control_Flow_Data);
+//FIXME : call hGuiEvents_Destructor for corresponding data upon widget destroy
 
-       
 
 
-       gtk_widget_show(Control_Flow_Data->Drawing_Area_V);
-       gtk_widget_show(Control_Flow_Data->Process_List_VC);
-       gtk_widget_show(Control_Flow_Data->Process_Scrolled_Window_VC);
-       gtk_widget_show(Control_Flow_Data->Drawing_Scrolled_Window_VC);
-       gtk_widget_show(Control_Flow_Data->HBox_V);
+/*****************************************************************************
+ *                              Drawing functions                            *
+ *****************************************************************************/
 
+typedef enum 
+{
+       RED,
+       GREEN,
+       BLUE,
+       WHITE,
+       BLACK
 
-       test_draw(Control_Flow_Data);
+} ControlFlowColors;
 
-       return Control_Flow_Data;
+/* Vector of unallocated colors */
+static GdkColor CF_Colors [] = 
+{
+       { 0, 0xffff, 0x0000, 0x0000 },  // RED
+       { 0, 0x0000, 0xffff, 0x0000 },  // GREEN
+       { 0, 0x0000, 0x0000, 0xffff },  // BLUE
+       { 0, 0xffff, 0xffff, 0xffff },  // WHITE
+       { 0, 0x0000, 0x0000, 0x0000 }           // BLACK
+};
 
-}
 
 gint get_cell_height(GtkTreeView *TreeView)
 {
@@ -378,80 +402,56 @@ gint get_cell_height(GtkTreeView *TreeView)
 }
 
 
-void Drawing_Area_Init(ControlFlowData *Control_Flow_Data)
+/* get_time_from_pixels
+ *
+ * Get the time interval from window time and pixels, and pixels requested. This
+ * function uses TimeMul, which should only be used if the float value is lower
+ * that 4, and here it's always lower than 1, so it's ok.
+ */
+void get_time_from_pixels(guint area_x, guint area_width,
+                                                                                                       guint window_width,
+                                                                                                       ltt_time &window_time_begin, ltt_time &window_time_end,
+                                                                                                       ltt_time &time_begin, ltt_time &time_end)
 {
-       DrawingAreaInfo *Drawing_Area_Info = &Control_Flow_Data->Drawing_Area_Info;
-       guint w;
-       //GdkWindow *Tree_View_Window = gtk_tree_view_get_bin_window(
-       //                                                                                                      GTK_TREE_VIEW(Control_Flow_Data->Process_List_VC));
-       //GdkRectangle visible_rect ;
-       w = 500;
+       ltt_time window_time_interval;
        
+       TimeSub(window_time_interval, window_time_end, window_time_begin);
 
-       //gdk_drawable_get_size(Tree_View_Window, NULL, &h);
-       //gdk_drawable_get_size(GTK_TREE_VIEW(Control_Flow_Data->Process_List_VC)->priv->bin_window, NULL, &h);
-       //gtk_widget_get_size_request(GTK_WIDGET(Control_Flow_Data->Process_Scrolled_Window_VC), NULL, &h);
-       //gdk_window_get_geometry(Tree_View_Window, NULL, NULL, &w, &h, NULL);
-       //gtk_tree_view_get_visible_rect(GTK_TREE_VIEW(Control_Flow_Data->Process_List_VC), &visible_rect);
-       //h = visible_rect.height;
-       /* 4 is probably the 2 pixels that the outside cells does not have */
-       Drawing_Area_Info->height =
-               get_cell_height(GTK_TREE_VIEW(Control_Flow_Data->Process_List_VC))
-                               * Control_Flow_Data->Number_Of_Process - 4 ;
        
-       gtk_widget_set_size_request (Control_Flow_Data->Drawing_Area_V,
-                                       w,
-                                       Drawing_Area_Info->height);
-
+       TimeMul(time_begin, window_time_interval, (area_x/(float)window_width));
+       TimeAdd(time_begin, window_time_begin, time_begin);
+       
+       TimeMul(time_end, window_time_interval, (area_width/(float)window_width));
+       TimeAdd(time_end, time_begin, time_end);
        
 }
 
-
-void expose_event_cb (GtkWidget *widget, GdkEventExpose *expose, gpointer data)
+void Drawing_Area_Init(ControlFlowData *Control_Flow_Data)
 {
-       ControlFlowData *Control_Flow_Data = (ControlFlowData*)data;
-
-       g_critical("expose");
+       DrawingAreaInfo *Drawing_Area_Info = &Control_Flow_Data->Drawing_Area_Info;
+       guint w;
 
-       /* When redrawing, use widget->allocation.width to get the width of
-        * drawable area. */
-       Control_Flow_Data->Drawing_Area_Info.width = widget->allocation.width;
+       w = 500;
        
-       test_draw(Control_Flow_Data);
-
-       //gdk_draw_arc (widget->window,
-  //              widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
-  //              TRUE,
-  //              //0, 0, widget->allocation.width, widget->allocation.height,
-  //              0, 0, widget->allocation.width,
-       //                                                      Control_Flow_Data->Drawing_Area_Info.height,
-  //              0, 64 * 360);
 
+       Drawing_Area_Info->height =
+               get_cell_height(GTK_TREE_VIEW(Control_Flow_Data->Process_List_VC))
+                               * Control_Flow_Data->Number_Of_Process ;
        
-       //Drawing_Area_Init(Control_Flow_Data);
-
-
-}
-
-
-void v_scroll_cb (GtkAdjustment *adjustment, gpointer data)
-{
-       ControlFlowData *Control_Flow_Data = (ControlFlowData*)data;
-       GtkTreePath *Tree_Path;
-
-       g_critical("DEBUG : scroll signal, value : %f", adjustment->value);
+       gtk_widget_modify_bg(Control_Flow_Data->Drawing_Area_V,
+                                                                                        GTK_STATE_NORMAL,
+                                                                                        &CF_Colors[BLACK]);
+                                                                                        
        
-       //get_test_data((int)adjustment->value, Control_Flow_Data->Num_Visible_Events, 
-       //                                                               Control_Flow_Data);
+       gtk_widget_set_size_request (Control_Flow_Data->Drawing_Area_V,
+                                       w,
+                                       Drawing_Area_Info->height);
        
        
-
 }
 
 
 
-
-
 void add_test_process(ControlFlowData *Control_Flow_Data)
 {
        GtkTreeIter iter;
@@ -485,486 +485,215 @@ void test_draw(ControlFlowData *Control_Flow_Data)
 }
 
 
-/*void Tree_V_set_cursor(ControlFlowData *Control_Flow_Data)
+/*****************************************************************************
+ *                       Hooks to be called by the main window               *
+ *****************************************************************************/
+/**
+ * Event Viewer's constructor hook
+ *
+ * This constructor is given as a parameter to the menuitem and toolbar button
+ * registration. It creates the list.
+ * @param pmParentWindow A pointer to the parent window.
+ * @return The widget created.
+ */
+GtkWidget *
+hGuiControlFlow(GtkWidget *pmParentWindow)
 {
-       GtkTreePath *path;
-
-       if(Control_Flow_Data->Selected_Event && Control_Flow_Data->First_Event != -1)
-       {
-               gtk_adjustment_set_value(Control_Flow_Data->VAdjust_C,
-                                                                                                                Control_Flow_Data->Currently_Selected_Event);
-               
-               path = gtk_tree_path_new_from_indices(
-                                                               Control_Flow_Data->Currently_Selected_Event-
-                                                               Control_Flow_Data->First_Event,
-                                                               -1);
+       ControlFlowData* Control_Flow_Data = GuiControlFlow() ;
 
-               gtk_tree_view_set_cursor(GTK_TREE_VIEW(Control_Flow_Data->Tree_V), path, NULL, FALSE);
-               gtk_tree_path_free(path);
-       }
+       return Control_Flow_Data->HBox_V ;
+       
 }
 
-void Tree_V_get_cursor(ControlFlowData *Control_Flow_Data)
+int Event_Selected_Hook(void *hook_data, void *call_data)
 {
-       GtkTreePath *path;
-       gint *indices;
-       
-       gtk_tree_view_get_cursor(GTK_TREE_VIEW(Control_Flow_Data->Tree_V), &path, NULL);
-       indices = gtk_tree_path_get_indices(path);
+       ControlFlowData *Control_Flow_Data = (ControlFlowData*) hook_data;
+       guint *Event_Number = (guint*) call_data;
 
-       if(indices != NULL)
-       {
-               Control_Flow_Data->Selected_Event = TRUE;
-               Control_Flow_Data->Currently_Selected_Event =
-                                       Control_Flow_Data->First_Event + indices[0];
+       g_critical("DEBUG : event selected by main window : %u", *Event_Number);
+       
+//     Control_Flow_Data->Currently_Selected_Event = *Event_Number;
+//     Control_Flow_Data->Selected_Event = TRUE ;
+       
+//     Tree_V_set_cursor(Control_Flow_Data);
 
-       } else {
-               Control_Flow_Data->Selected_Event = FALSE;
-               Control_Flow_Data->Currently_Selected_Event = 0;
-       }
-       g_critical("DEBUG : Event Selected : %i , num: %u", Control_Flow_Data->Selected_Event,  Control_Flow_Data->Currently_Selected_Event) ;
+}
 
-       gtk_tree_path_free(path);
 
+/* Hook called before drawing. Gets the initial context at the beginning of the
+ * drawing interval and copy it to the context in Event_Request.
+ */
+Draw_Before_Hook(void *hook_data, void *call_data)
+{
+       EventRequest *Event_Request = (EventRequest*)hook_data;
+       EventsContext Events_Context = (EventsContext*)call_data;
+       
+       Event_Request->Events_Context = Events_Context;
 }
-*/
 
-#ifdef DEBUG
-void Tree_V_move_cursor_cb (GtkWidget *widget, GtkMovementStep arg1, gint arg2, gpointer data)
+/*
+ * The draw event hook is called by the reading API to have a
+ * particular event drawn on the screen.
+ * @param hook_data ControlFlowData structure of the viewer. 
+ * @param call_data Event context.
+ *
+ * This function basically draw lines and icons. Two types of lines are drawn :
+ * one small (3 pixels?) representing the state of the process and the second
+ * type is thicker (10 pixels?) representing on which CPU a process is running
+ * (and this only in running state).
+ *
+ * Extremums of the lines :
+ * x_min : time of the last event context for this process kept in memory.
+ * x_max : time of the current event.
+ * y : middle of the process in the process list. The process is found in the
+ * list, therefore is it's position in pixels.
+ *
+ * The choice of lines'color is defined by the context of the last event for this
+ * process.
+ */
+Draw_Event_Hook(void *hook_data, void *call_data)
 {
-       GtkTreePath *path; // = gtk_tree_path_new();
-       gint *indices;
-       gdouble value;
-       ControlFlowData *Control_Flow_Data = (ControlFlowData*)data;
-
-       gtk_tree_view_get_cursor(GTK_TREE_VIEW(Control_Flow_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(Control_Flow_Data->Tree_V), path, NULL, FALSE);
-       }
-               
-       indices = gtk_tree_path_get_indices(path);
-
-       g_critical("DEBUG : move cursor step : %u , int : %i , indice : %i", (guint)arg1, arg2, indices[0]) ;
-
-       value = gtk_adjustment_get_value(Control_Flow_Data->VAdjust_C);
-
-       if(arg1 == GTK_MOVEMENT_DISPLAY_LINES)
-       {
-               /* Move one line */
-               if(arg2 == 1)
-               {
-                       /* move one line down */
-                       if(indices[0] == Control_Flow_Data->Num_Visible_Events - 1)
-                       {
-                               if(value + Control_Flow_Data->Num_Visible_Events <= 
-                                                                                                               Control_Flow_Data->Number_Of_Events -1)
-                               {
-                                       g_critical("need 1 event down") ;
-                                       Control_Flow_Data->Currently_Selected_Event += 1;
-                                       gtk_adjustment_set_value(Control_Flow_Data->VAdjust_C, value+1);
-                                       //gtk_tree_path_free(path);
-                                       //path = gtk_tree_path_new_from_indices(Control_Flow_Data->Num_Visible_Events-1, -1);
-                                       //gtk_tree_view_set_cursor(GTK_TREE_VIEW(Control_Flow_Data->Tree_V), path, NULL, FALSE);
-                                       g_signal_stop_emission_by_name(G_OBJECT(widget), "move-cursor");
-                               }
-                       }
-               } else {
-                       /* Move one line up */
-                       if(indices[0] == 0)
-                       {
-                               if(value - 1 >= 0 )
-                               {
-                                       g_critical("need 1 event up") ;
-                                       Control_Flow_Data->Currently_Selected_Event -= 1;
-                                       gtk_adjustment_set_value(Control_Flow_Data->VAdjust_C, value-1);
-                                       //gtk_tree_path_free(path);
-                                       //path = gtk_tree_path_new_from_indices(0, -1);
-                                       //gtk_tree_view_set_cursor(GTK_TREE_VIEW(Control_Flow_Data->Tree_V), path, NULL, FALSE);
-                                       g_signal_stop_emission_by_name(G_OBJECT(widget), "move-cursor");
-                               }
-               
-                       }
-               }
-
-       }
-
-       if(arg1 == GTK_MOVEMENT_PAGES)
-       {
-               /* Move one page */
-               if(arg2 == 1)
-               {
-                       if(Control_Flow_Data->Num_Visible_Events == 1)
-                               value += 1 ;
-                       /* move one page down */
-                       if(value + Control_Flow_Data->Num_Visible_Events-1 <= 
-                                                                                       Control_Flow_Data->Number_Of_Events )
-                       {
-                               g_critical("need 1 page down") ;
-
-                               Control_Flow_Data->Currently_Selected_Event += Control_Flow_Data->Num_Visible_Events-1;
-                               gtk_adjustment_set_value(Control_Flow_Data->VAdjust_C,
-                                                                                                                               value+(Control_Flow_Data->Num_Visible_Events-1));
-                               //gtk_tree_path_free(path);
-                               //path = gtk_tree_path_new_from_indices(0, -1);
-                               //gtk_tree_view_set_cursor(GTK_TREE_VIEW(Control_Flow_Data->Tree_V), path, NULL, FALSE);
-                               g_signal_stop_emission_by_name(G_OBJECT(widget), "move-cursor");
-                       }
-               } else {
-                       /* Move one page up */
-                       if(Control_Flow_Data->Num_Visible_Events == 1)
-                                       value -= 1 ;
-
-                       if(indices[0] < Control_Flow_Data->Num_Visible_Events - 2 )
-                       {
-                               if(value - (Control_Flow_Data->Num_Visible_Events-1) >= 0)
-                               {
-                                       g_critical("need 1 page up") ;
-                                       
-                                       Control_Flow_Data->Currently_Selected_Event -= Control_Flow_Data->Num_Visible_Events-1;
-
-                                       gtk_adjustment_set_value(Control_Flow_Data->VAdjust_C,
-                                                                                                                                       value-(Control_Flow_Data->Num_Visible_Events-1));
-                                       //gtk_tree_path_free(path);
-                                       //path = gtk_tree_path_new_from_indices(0, -1);
-                                       //gtk_tree_view_set_cursor(GTK_TREE_VIEW(Control_Flow_Data->Tree_V), path, NULL, FALSE);
-                                       g_signal_stop_emission_by_name(G_OBJECT(widget), "move-cursor");
-
-                               } else {
-                                       /* Go to first Event */
-                                       g_critical("need 1 page up") ;
-
-                                       Control_Flow_Data->Currently_Selected_Event == 0 ;
-                                       gtk_adjustment_set_value(Control_Flow_Data->VAdjust_C,
-                                                                                                                                       0);
-                                       //gtk_tree_path_free(path);
-                                       //path = gtk_tree_path_new_from_indices(0, -1);
-                                       //gtk_tree_view_set_cursor(GTK_TREE_VIEW(Control_Flow_Data->Tree_V), path, NULL, FALSE);
-                                       g_signal_stop_emission_by_name(G_OBJECT(widget), "move-cursor");
-
-                               }
-                       }
-                       
-               }
-
-       }
-
-       if(arg1 == GTK_MOVEMENT_BUFFER_ENDS)
-       {
-               /* Move to the ends of the buffer */
-               if(arg2 == 1)
-               {
-                       /* move end of buffer */
-                       g_critical("End of buffer") ;
-                       Control_Flow_Data->Currently_Selected_Event = Control_Flow_Data->Number_Of_Events-1 ;
-                       gtk_adjustment_set_value(Control_Flow_Data->VAdjust_C, 
-                                       Control_Flow_Data->Number_Of_Events -
-                                               Control_Flow_Data->Num_Visible_Events);
-                       //gtk_tree_path_free(path);
-                       //path = gtk_tree_path_new_from_indices(Control_Flow_Data->Num_Visible_Events-1, -1);
-                       //gtk_tree_view_set_cursor(GTK_TREE_VIEW(Control_Flow_Data->Tree_V), path, NULL, FALSE);
-                       g_signal_stop_emission_by_name(G_OBJECT(widget), "move-cursor");
-               } else {
-                       /* Move beginning of buffer */
-                       g_critical("Beginning of buffer") ;
-                       Control_Flow_Data->Currently_Selected_Event = 0 ;
-                       gtk_adjustment_set_value(Control_Flow_Data->VAdjust_C, 0);
-                       //gtk_tree_path_free(path);
-                       //path = gtk_tree_path_new_from_indices(0, -1);
-                       //gtk_tree_view_set_cursor(GTK_TREE_VIEW(Control_Flow_Data->Tree_V), path, NULL, FALSE);
-                       g_signal_stop_emission_by_name(G_OBJECT(widget), "move-cursor");
-               }
-
-       }
-
+       EventRequest *Event_Request = (EventRequest*)hook_data;
 
-       gtk_tree_path_free(path);
 }
 
-void Tree_V_cursor_changed_cb (GtkWidget *widget, gpointer data)
-{
-       ControlFlowData *Control_Flow_Data = (ControlFlowData*) data;
 
-       g_critical("DEBUG : cursor change");
-       /* On cursor change, modify the currently selected event by calling
-        * the right API function */
-       Tree_V_get_cursor(Control_Flow_Data);
+Draw_After_Hook(void *hook_data, void *call_data)
+{
+       EventRequest *Event_Request = (EventRequest*)hook_data;
+       
+       g_free(Event_Request);
 }
 
-
-void v_scroll_cb (GtkAdjustment *adjustment, gpointer data)
+/*****************************************************************************
+ *                       Callbacks used for the viewer                       *
+ *****************************************************************************/
+void expose_event_cb (GtkWidget *widget, GdkEventExpose *expose, gpointer data)
 {
        ControlFlowData *Control_Flow_Data = (ControlFlowData*)data;
-       GtkTreePath *Tree_Path;
 
-       g_critical("DEBUG : scroll signal, value : %f", adjustment->value);
+       EventRequest *Event_Request = g_new(sizeof(EventRequest));
        
-       get_test_data((int)adjustment->value, Control_Flow_Data->Num_Visible_Events, 
-                                                                        Control_Flow_Data);
+       Event_Request->Control_Flow_Data = Control_Flow_Data;
        
+       /* Calculate, from pixels in expose, the time interval to get data */
        
-       if(Control_Flow_Data->Currently_Selected_Event
-                                                               >= Control_Flow_Data->First_Event
-                                                               &&
-                Control_Flow_Data->Currently_Selected_Event
-                                                               <= Control_Flow_Data->Last_Event
-                                                               &&
-                Control_Flow_Data->Selected_Event)
-       {
-
-               Tree_Path = gtk_tree_path_new_from_indices(
-                                                               Control_Flow_Data->Currently_Selected_Event-
-                                                               Control_Flow_Data->First_Event,
-                                                               -1);
-
-               gtk_tree_view_set_cursor(GTK_TREE_VIEW(Control_Flow_Data->Tree_V), Tree_Path,
-                                                                                                                               NULL, FALSE);
-               gtk_tree_path_free(Tree_Path);
-       }
-
+       get_time_from_pixels(expose->area.x, expose->area.width,
+                                                                                                       Control_Flow_Data->Drawing_Area_Info.width,
+                                                                                                       &Control_Flow_Data->Begin_Time, &Control_Flow_Data->End_Time,
+                                                                                                       &Event_Request->time_begin, &Event_Request->time_end)
+       
+       /* Look in statistics of the trace the processes present during the
+        * whole time interval _shown on the screen_. Modify the list of 
+        * processes to match it. NOTE : modify, not recreate. If recreation is
+        * needed,keep a pointer to the currently selected event in the list.
+        */
+       
+       /* Call the reading API to have events sent to drawing hooks */
+       lttv_trace_set_process( Control_Flow_Data->Trace_Set,
+                                                                                                       Draw_Before_Hooks,
+                                                                                                       Draw_Event_Hooks,
+                                                                                                       Draw_After_Hooks,
+                                                                                                       NULL, //FIXME : filter here
+                                                                                                       Event_Request->time_begin,
+                                                                                                       Event_Request->time_end);
 
 }
 
-gint get_cell_height(GtkTreeView *TreeView)
-{
-       gint height, width;
-       GtkTreeViewColumn *Column = gtk_tree_view_get_column(TreeView, 0);
-       GList *Render_List = gtk_tree_view_column_get_cell_renderers(Column);
-       GtkCellRenderer *Renderer = g_list_first(Render_List)->data;
+#ifdef DEBUG
+void test_draw() {
+       gint cell_height = get_cell_height(GTK_TREE_VIEW(Control_Flow_Data->Process_List_VC));
+       GdkGC *GC = gdk_gc_new(widget->window);
+       GdkColor color = CF_Colors[GREEN];
        
-       gtk_tree_view_column_cell_get_size(Column, NULL, NULL, NULL, NULL, &height);
-       g_critical("cell 0 height : %u",height);
+       gdk_color_alloc (gdk_colormap_get_system () , &color);
        
-       return height;
-}
+       g_critical("expose");
 
-void Tree_V_size_allocate_cb (GtkWidget *widget, GtkAllocation *alloc, gpointer data)
-{
-       ControlFlowData *Control_Flow_Data = (ControlFlowData*)data;
-       gint Cell_Height = get_cell_height(GTK_TREE_VIEW(Control_Flow_Data->Tree_V));
-       gint Last_Num_Visible_Events = Control_Flow_Data->Num_Visible_Events;
-       gdouble Exact_Num_Visible;
+       /* When redrawing, use widget->allocation.width to get the width of
+        * drawable area. */
+       Control_Flow_Data->Drawing_Area_Info.width = widget->allocation.width;
        
-       g_critical("size-allocate");
-
-       Exact_Num_Visible = ( alloc->height -
-                       TREE_VIEW_HEADER_HEIGHT (GTK_TREE_VIEW(Control_Flow_Data->Tree_V)) )
-                               / (double)Cell_Height ;
-
-       Control_Flow_Data->Num_Visible_Events = ceil(Exact_Num_Visible) ;
-
-       g_critical("number of events shown : %u",Control_Flow_Data->Num_Visible_Events);
-       g_critical("ex number of events shown : %f",Exact_Num_Visible);
-
-       Control_Flow_Data->VAdjust_C->page_increment = 
-                                floor(Exact_Num_Visible);
-       Control_Flow_Data->VAdjust_C->page_size =
-                                floor(Exact_Num_Visible);
-
-       if(Control_Flow_Data->Num_Visible_Events != Last_Num_Visible_Events)
-       {
-               get_test_data((int)Control_Flow_Data->VAdjust_C->value,
-                                                                                Control_Flow_Data->Num_Visible_Events, 
-                                                                                Control_Flow_Data);
-       }
-
-
-}
-
-void Tree_V_size_request_cb (GtkWidget *widget, GtkRequisition *requisition, gpointer data)
-{
-       gint h;
-       ControlFlowData *Control_Flow_Data = (ControlFlowData*)data;
-       gint Cell_Height = get_cell_height(GTK_TREE_VIEW(Control_Flow_Data->Tree_V));
+       test_draw(Control_Flow_Data);
        
-       g_critical("size-request");
-
-       h = Cell_Height + TREE_VIEW_HEADER_HEIGHT
-                                                                                       (GTK_TREE_VIEW(Control_Flow_Data->Tree_V));
-       requisition->height = h;
+       gdk_gc_copy(GC,widget->style->white_gc);
+       gdk_gc_set_foreground(GC,&color);
        
-}
-
-#endif //DEBUG
-
-void get_test_data(guint Event_Number, guint List_Height, 
-                                                                        ControlFlowData *Control_Flow_Data)
-{
-       //GtkTreeIter iter;
-       int i;
-       //GtkTreeModel *model = GTK_TREE_MODEL(Control_Flow_Data->Store_M);
-       //GtkTreePath *Tree_Path;
-       gchar *test_string;
+       //gdk_draw_arc (widget->window,
+  //              widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
+  //              TRUE,
+  //              //0, 0, widget->allocation.width, widget->allocation.height,
+  //              0, 0, widget->allocation.width,
+       //                                                      Control_Flow_Data->Drawing_Area_Info.height,
+  //              0, 64 * 360);
 
-//     if(Event_Number > Control_Flow_Data->Last_Event ||
-//              Event_Number + List_Height-1 < Control_Flow_Data->First_Event ||
-//              Control_Flow_Data->First_Event == -1)
-       {
-               /* no event can be reused, clear and start from nothing */
-               //gtk_list_store_clear(Control_Flow_Data->Store_M);
-               for(i=Event_Number; i<Event_Number+List_Height; i++)
-               {
-                       if(i>=Control_Flow_Data->Number_Of_Events) break;
-                 /* Add a new row to the model */
-               //      gtk_list_store_append (Control_Flow_Data->Store_M, &iter);
-               //      gtk_list_store_set (Control_Flow_Data->Store_M, &iter,
-               //                                                                                      CPUID_COLUMN, 0,
-               //                                                                              EVENT_COLUMN, "event irq",
-               //                                                                                TIME_COLUMN, i,
-               //                                                                                PID_COLUMN, 100,
-               //                                                                                ENTRY_LEN_COLUMN, 17,
-               //                                                                                EVENT_DESCR_COLUMN, "Detailed information",
-               //                                                                                      -1);
-               }
-       }
-#ifdef DEBUG //do not use this, it's slower and broken
-//     } else {
-               /* Some events will be reused */
-               if(Event_Number < Control_Flow_Data->First_Event)
-               {
-                       /* scrolling up, prepend events */
-                       Tree_Path = gtk_tree_path_new_from_indices
-                                                                               (Event_Number+List_Height-1 -
-                                                                                Control_Flow_Data->First_Event + 1,
-                                                                                -1);
-                       for(i=0; i<Control_Flow_Data->Last_Event-(Event_Number+List_Height-1);
-                                                                                                                                                               i++)
-                       {
-                               /* Remove the last events from the list */
-                               if(gtk_tree_model_get_iter(model, &iter, Tree_Path))
-                                       gtk_list_store_remove(Control_Flow_Data->Store_M, &iter);
-                       }
-
-                       for(i=Control_Flow_Data->First_Event-1; i>=Event_Number; i--)
-                       {
-                               if(i>=Control_Flow_Data->Number_Of_Events) break;
-                               /* Prepend new events */
-                               gtk_list_store_prepend (Control_Flow_Data->Store_M, &iter);
-                               gtk_list_store_set (Control_Flow_Data->Store_M, &iter,
-                                                                                                               CPUID_COLUMN, 0,
-                                                                                                       EVENT_COLUMN, "event irq",
-                                                                                                         TIME_COLUMN, i,
-                                                                                                         PID_COLUMN, 100,
-                                                                                                         ENTRY_LEN_COLUMN, 17,
-                                                                                                         EVENT_DESCR_COLUMN, "Detailed information",
-                                                                                                               -1);
-                       }
-               } else {
-                       /* Scrolling down, append events */
-                       for(i=Control_Flow_Data->First_Event; i<Event_Number; i++)
-                       {
-                               /* Remove these events from the list */
-                               gtk_tree_model_get_iter_first(model, &iter);
-                               gtk_list_store_remove(Control_Flow_Data->Store_M, &iter);
-                       }
-                       for(i=Control_Flow_Data->Last_Event+1; i<Event_Number+List_Height; i++)
-                       {
-                               if(i>=Control_Flow_Data->Number_Of_Events) break;
-                               /* Append new events */
-                               gtk_list_store_append (Control_Flow_Data->Store_M, &iter);
-                               gtk_list_store_set (Control_Flow_Data->Store_M, &iter,
-                                                                                                               CPUID_COLUMN, 0,
-                                                                                                       EVENT_COLUMN, "event irq",
-                                                                                                         TIME_COLUMN, i,
-                                                                                                         PID_COLUMN, 100,
-                                                                                                         ENTRY_LEN_COLUMN, 17,
-                                                                                                         EVENT_DESCR_COLUMN, "Detailed information",
-                                                                                                               -1);
-                       }
-
-               }
-       }
-#endif //DEBUG
-       Control_Flow_Data->First_Event = Event_Number ;
-       Control_Flow_Data->Last_Event = Event_Number+List_Height-1 ;
        
+       //Drawing_Area_Init(Control_Flow_Data);
+       
+       // 2 pixels for the box around the drawing area, 1 pixel for off-by-one
+       // (starting from 0)
+       //gdk_gc_copy (&GC, widget->style->fg_gc[GTK_WIDGET_STATE (widget)]);
 
-
-}
+       gdk_gc_set_line_attributes(GC,12, GDK_LINE_SOLID, GDK_CAP_NOT_LAST,GDK_JOIN_MITER);
        
-#ifdef DEBUG
-void add_test_data(ControlFlowData *Control_Flow_Data)
-{
-       GtkTreeIter iter;
-       int i;
+       gdk_draw_line (widget->window,
+                 GC,
+                                                                0, (cell_height-1)/2,
+                                                                widget->allocation.width, (cell_height-1)/2);
+
+       color = CF_Colors[BLUE];
        
-       for(i=0; i<10; i++)
-       {
-         /* Add a new row to the model */
-               gtk_list_store_append (Control_Flow_Data->Store_M, &iter);
-               gtk_list_store_set (Control_Flow_Data->Store_M, &iter,
-                                                                                               CPUID_COLUMN, 0,
-                                                                                       EVENT_COLUMN, "event irq",
-                                                                                         TIME_COLUMN, i,
-                                                                                         PID_COLUMN, 100,
-                                                                                         ENTRY_LEN_COLUMN, 17,
-                                                                                         EVENT_DESCR_COLUMN, "Detailed information",
-                                                                                               -1);
-       }
-                                                       
-}
+       gdk_color_alloc (gdk_colormap_get_system () , &color);
        
-#endif //DEBUG
-void
-GuiControlFlow_Destructor(ControlFlowData *Control_Flow_Data)
-{
-       guint index;
+       gdk_gc_set_foreground(GC,&color);
 
-       /* May already been done by GTK window closing */
-       if(GTK_IS_WIDGET(Control_Flow_Data->HBox_V))
-               gtk_widget_destroy(Control_Flow_Data->HBox_V);
+
+               gdk_gc_set_line_attributes(GC,3, GDK_LINE_SOLID, GDK_CAP_NOT_LAST,GDK_JOIN_MITER);
        
-       /* Destroy the Tree View */
-       //gtk_widget_destroy(Control_Flow_Data->Tree_V);
+       gdk_draw_line (widget->window,
+                 GC,
+                                                                0, (cell_height-1)/2,
+                                                                widget->allocation.width,(cell_height-1)/2);
        
-  /*  Clear raw event list */
-       //gtk_list_store_clear(Control_Flow_Data->Store_M);
-       //gtk_widget_destroy(GTK_WIDGET(Control_Flow_Data->Store_M));
 
-       g_slist_remove(sControl_Flow_Data_List,Control_Flow_Data);
-}
 
-//FIXME : call hGuiEvents_Destructor for corresponding data upon widget destroy
 
-#ifdef DEBUG
-static void
-tree_selection_changed_cb (GtkTreeSelection *selection, gpointer data)
-{
-                               ControlFlowData *Control_Flow_Data = (ControlFlowData*)data;
-        GtkTreeIter iter;
-                               GtkTreeModel *model = GTK_TREE_MODEL(Control_Flow_Data->Store_M);
-        gchar *Event;
 
-        if (gtk_tree_selection_get_selected (selection, &model, &iter))
-        {
-                gtk_tree_model_get (model, &iter, EVENT_COLUMN, &Event, -1);
 
-                g_print ("Event selected :  %s\n", Event);
+       g_object_unref(GC);
+       
+       //gdk_colormap_alloc_colors(gdk_colormap_get_system(), TRUE, 
+               
+       //gdk_gc_set_line_attributes(GC,5, GDK_LINE_SOLID, GDK_CAP_NOT_LAST,GDK_JOIN_MITER);
+       //gdk_gc_set_foreground(GC, 
+
+       //gdk_draw_line (widget->window,
+  //               GC,
+       //                                                       0, (2*cell_height)-2-1,
+       //                                                       50, (2*cell_height)-2-1);
 
-                g_free (Event);
-        }
 }
 #endif //DEBUG
 
-
-int Event_Selected_Hook(void *hook_data, void *call_data)
+void v_scroll_cb (GtkAdjustment *adjustment, gpointer data)
 {
-       ControlFlowData *Control_Flow_Data = (ControlFlowData*) hook_data;
-       guint *Event_Number = (guint*) call_data;
+       ControlFlowData *Control_Flow_Data = (ControlFlowData*)data;
+       GtkTreePath *Tree_Path;
 
-       g_critical("DEBUG : event selected by main window : %u", *Event_Number);
+       g_critical("DEBUG : scroll signal, value : %f", adjustment->value);
+       
+       //get_test_data((int)adjustment->value, Control_Flow_Data->Num_Visible_Events, 
+       //                                                               Control_Flow_Data);
        
-//     Control_Flow_Data->Currently_Selected_Event = *Event_Number;
-//     Control_Flow_Data->Selected_Event = TRUE ;
        
-//     Tree_V_set_cursor(Control_Flow_Data);
 
 }
 
 
 
+
+
+
 static void destroy_cb( GtkWidget *widget,
                                        gpointer   data )
 { 
@@ -973,6 +702,11 @@ static void destroy_cb( GtkWidget *widget,
 
 
 
+/*****************************************************************************
+ *                                test routines                              *
+ *****************************************************************************/
+
+
 int main(int argc, char **argv)
 {
        GtkWidget *Window;
@@ -1010,7 +744,7 @@ int main(int argc, char **argv)
   //gtk_box_pack_start(GTK_BOX(VBox_V), ListViewer, FALSE, TRUE, 0);
        
        Control_Flow_Data = GuiControlFlow();
-       CF_Viewer = Control_Flow_Data->HBox_V;
+       CF_Viewer = Control_Flow_Data->Scrolled_Window_VC;
   gtk_box_pack_start(GTK_BOX(VBox_V), CF_Viewer, TRUE, TRUE, 0);
 
   /* Create horizontal scrollbar and pack it */
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