X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=ltt%2Fbranches%2Fpoly%2Flttv%2Fmodules%2Fgui%2Fcontrolflow%2Fdrawing.c;h=f1ada9e77ba9856280c9b290169e2ad99a393be1;hb=7abb23ad0e7234c65fbd6f1d64ea591de3f98faf;hp=e877e6d99cca540a9ce60c896db30db0c5150b17;hpb=10a1069a786aebb338aee5a31c1e3e17198aacbb;p=lttv.git diff --git a/ltt/branches/poly/lttv/modules/gui/controlflow/drawing.c b/ltt/branches/poly/lttv/modules/gui/controlflow/drawing.c index e877e6d9..f1ada9e7 100644 --- a/ltt/branches/poly/lttv/modules/gui/controlflow/drawing.c +++ b/ltt/branches/poly/lttv/modules/gui/controlflow/drawing.c @@ -18,6 +18,9 @@ #include #include +#include + +#include #include #include @@ -28,15 +31,16 @@ #include "drawing.h" #include "eventhooks.h" #include "cfv.h" -#include "cfv-private.h" #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format) #define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format) //FIXME #define TRACE_NUMBER 0 +#define EXTRA_ALLOC 1024 // pixels +#if 0 /* colors for two lines representation */ GdkColor drawing_colors[NUM_COLORS] = { /* Pixel, R, G, B */ { 0, 0, 0, 0 }, /* COL_BLACK */ @@ -54,7 +58,40 @@ GdkColor drawing_colors[NUM_COLORS] = { 0, 0xFFFF, 0xFFFF, 0xFFFF } /* COL_MODE_UNKNOWN : white */ }; +#endif //0 + + +GdkColor drawing_colors[NUM_COLORS] = +{ /* Pixel, R, G, B */ + { 0, 0, 0, 0 }, /* COL_BLACK */ + { 0, 0xFFFF, 0xFFFF, 0xFFFF }, /* COL_WHITE */ + { 0, 0x0000, 0xFF00, 0x0000 }, /* COL_RUN_USER_MODE : green */ + { 0, 0x0100, 0x9E00, 0xFFFF }, /* COL_RUN_SYSCALL : pale blue */ + { 0, 0xFF00, 0xFF00, 0x0100 }, /* COL_RUN_TRAP : yellow */ + { 0, 0xFFFF, 0x0000, 0x0000 }, /* COL_RUN_IRQ : red */ + { 0, 0xA3FF, 0x0000, 0x0000 }, /* COL_WAIT : dark red */ + { 0, 0x7700, 0x7700, 0x0000 }, /* COL_WAIT_CPU : dark yellow */ + { 0, 0x6400, 0x0000, 0x5D00 }, /* COL_ZOMBIE : dark purple */ + { 0, 0x0700, 0x6400, 0x0000 }, /* COL_WAIT_FORK : dark green */ + { 0, 0x8900, 0x0000, 0x8400 }, /* COL_EXIT : "less dark" magenta */ + { 0, 0xFFFF, 0xFFFF, 0xFFFF }, /* COL_MODE_UNKNOWN : white */ + { 0, 0xFFFF, 0xFFFF, 0xFFFF } /* COL_UNNAMED : white */ + +}; + +/* +RUN+USER MODE green +RUN+SYSCALL +RUN+TRAP +RUN+IRQ +WAIT+foncé +WAIT CPU + WAIT FORK vert foncé ou jaune +IRQ rouge +TRAP: orange +SYSCALL: bleu pâle +ZOMBIE + WAIT EXIT +*/ /***************************************************************************** @@ -82,12 +119,6 @@ void drawing_data_request(Drawing_t *drawing, if(width < 0) return ; if(height < 0) return ; - if(drawing->gc == NULL) { - drawing->gc = gdk_gc_new(drawing->drawing_area->window); - gdk_gc_copy(drawing->gc, drawing->drawing_area->style->black_gc); - } - - Tab *tab = drawing->control_flow_data->tab; TimeWindow time_window = lttvwindow_get_time_window(tab); @@ -97,29 +128,28 @@ void drawing_data_request(Drawing_t *drawing, // G_OBJECT(drawing->drawing_area), "control_flow_data"); LttTime start, time_end; - LttTime window_end = ltt_time_add(time_window.time_width, - time_window.start_time); + LttTime window_end = time_window.end_time; - g_debug("req : window start_time : %u, %u", time_window.start_time.tv_sec, + g_debug("req : window start_time : %lu, %lu", time_window.start_time.tv_sec, time_window.start_time.tv_nsec); - g_debug("req : window time width : %u, %u", time_window.time_width.tv_sec, + g_debug("req : window time width : %lu, %lu", time_window.time_width.tv_sec, time_window.time_width.tv_nsec); - g_debug("req : window_end : %u, %u", window_end.tv_sec, + g_debug("req : window_end : %lu, %lu", window_end.tv_sec, window_end.tv_nsec); g_debug("x is : %i, x+width is : %i", x, x+width); convert_pixels_to_time(drawing->width, x, - time_window.start_time, - window_end, + time_window, &start); convert_pixels_to_time(drawing->width, x+width, - time_window.start_time, - window_end, + time_window, &time_end); + time_end = ltt_time_add(time_end, ltt_time_one); // because main window + // doesn't deliver end time. lttvwindow_events_request_remove_all(tab, control_flow_data); @@ -140,13 +170,10 @@ void drawing_data_request(Drawing_t *drawing, LttvTraceHook hook; - LttvAttributeValue val; - nb_trace = lttv_traceset_number(traceset); // FIXME : eventually request for more traces // for(i = 0 ; i < nb_trace ; i++) { - g_assert(TRACE_NUMBER < nb_trace); - i = TRACE_NUMBER; + for(i = 0; iparent.t, "core","syscall_entry","syscall_id", NULL, NULL, after_execmode_hook, &g_array_index(hooks, LttvTraceHook, 8)); - + /**** DESACTIVATED ****/ lttv_trace_find_hook(ts->parent.t, "core", "syscall_exit", NULL, NULL, NULL, after_execmode_hook, &g_array_index(hooks, LttvTraceHook, 9)); + /**** DESACTIVATED ****/ lttv_trace_find_hook(ts->parent.t, "core", "trap_entry", "trap_id", NULL, NULL, after_execmode_hook, &g_array_index(hooks, LttvTraceHook, 10)); + /**** DESACTIVATED ****/ lttv_trace_find_hook(ts->parent.t, "core", "trap_exit", NULL, NULL, NULL, after_execmode_hook, &g_array_index(hooks, LttvTraceHook, 11)); + /**** DESACTIVATED ****/ lttv_trace_find_hook(ts->parent.t, "core", "irq_entry", "irq_id", NULL, NULL, after_execmode_hook, &g_array_index(hooks, LttvTraceHook, 12)); + /**** DESACTIVATED ****/ lttv_trace_find_hook(ts->parent.t, "core", "irq_exit", NULL, NULL, NULL, after_execmode_hook, &g_array_index(hooks, LttvTraceHook, 13)); +#endif //0 lttv_trace_find_hook(ts->parent.t, "core", "schedchange", "in", "out", "out_state", after_schedchange_hook, - &g_array_index(hooks, LttvTraceHook, 14)); + &g_array_index(hooks, LttvTraceHook, 8)); lttv_trace_find_hook(ts->parent.t, "core", "process", "event_sub_id", "event_data1", "event_data2", after_process_hook, - &g_array_index(hooks, LttvTraceHook, 15)); + &g_array_index(hooks, LttvTraceHook, 9)); #if 0 lttv_trace_find_hook(ts->parent.t, "core", "process_fork", "child_pid", @@ -261,9 +295,8 @@ void drawing_data_request(Drawing_t *drawing, /* Add these hooks to each event_by_id hooks list */ - /* add before */ - for(k = 0 ; k < hooks->len/2 ; k++) { + for(k = 0 ; k < 8 ; k++) { hook = g_array_index(hooks, LttvTraceHook, k); lttv_hooks_add(lttv_hooks_by_id_find(event_by_id, hook.id), hook.h, @@ -272,7 +305,7 @@ void drawing_data_request(Drawing_t *drawing, } /* add after */ - for(k = hooks->len/2 ; k < hooks->len ; k++) { + for(k = 8 ; k < 10 ; k++) { hook = g_array_index(hooks, LttvTraceHook, k); lttv_hooks_add(lttv_hooks_by_id_find(event_by_id, hook.id), hook.h, @@ -304,10 +337,10 @@ void drawing_data_request(Drawing_t *drawing, events_request->before_request = before_request_hook; events_request->after_request = after_request_hook; - g_debug("req : start : %u, %u", start.tv_sec, + g_debug("req : start : %lu, %lu", start.tv_sec, start.tv_nsec); - g_debug("req : end : %u, %u", time_end.tv_sec, + g_debug("req : end : %lu, %lu", time_end.tv_sec, time_end.tv_nsec); lttvwindow_events_request(tab, events_request); @@ -353,8 +386,15 @@ static void set_last_start(gpointer key, gpointer value, gpointer user_data) guint x = (guint)user_data; hashed_process_data->x.over = x; + hashed_process_data->x.over_used = FALSE; + hashed_process_data->x.over_marked = FALSE; hashed_process_data->x.middle = x; + hashed_process_data->x.middle_used = FALSE; + hashed_process_data->x.middle_marked = FALSE; hashed_process_data->x.under = x; + hashed_process_data->x.under_used = FALSE; + hashed_process_data->x.under_marked = FALSE; + hashed_process_data->next_good_time = ltt_time_zero; return; } @@ -366,22 +406,21 @@ void drawing_data_request_begin(EventsRequest *events_request, LttvTracesetState LttvTracesetContext *tsc = LTTV_TRACESET_CONTEXT(tss); TimeWindow time_window = lttvwindow_get_time_window(cfd->tab); - LttTime end_time = ltt_time_add(time_window.start_time, - time_window.time_width); + guint width = cfd->drawing->width; guint x=0; cfd->drawing->last_start = events_request->start_time; convert_time_to_pixels( - time_window.start_time, - end_time, + time_window, events_request->start_time, width, &x); g_hash_table_foreach(cfd->process_list->process_hash, set_last_start, (gpointer)x); + } void drawing_chunk_begin(EventsRequest *events_request, LttvTracesetState *tss) @@ -389,8 +428,13 @@ void drawing_chunk_begin(EventsRequest *events_request, LttvTracesetState *tss) g_debug("Begin of chunk"); ControlFlowData *cfd = events_request->viewer_data; LttvTracesetContext *tsc = LTTV_TRACESET_CONTEXT(tss); - LttTime current_time = lttv_traceset_context_get_current_tfc(tsc)->timestamp; + //LttTime current_time = lttv_traceset_context_get_current_tfc(tsc)->timestamp; + guint num_cpu = + ltt_trace_per_cpu_tracefile_number(tss->parent.traces[TRACE_NUMBER]->t); + cfd->process_list->current_hash_data = g_new(HashedProcessData*,num_cpu); + memset(cfd->process_list->current_hash_data, 0, + sizeof(HashedProcessData*)*num_cpu); //cfd->drawing->last_start = LTT_TIME_MIN(current_time, // events_request->end_time); } @@ -403,7 +447,7 @@ void drawing_request_expose(EventsRequest *events_request, gint x, x_end, width; ControlFlowData *cfd = events_request->viewer_data; - LttvTracesetContext *tsc = LTTV_TRACESET_CONTEXT(tss); + LttvTracesetContext *tsc = (LttvTracesetContext*)tss; Drawing_t *drawing = cfd->drawing; TimeWindow time_window = @@ -411,42 +455,20 @@ void drawing_request_expose(EventsRequest *events_request, g_debug("request expose"); - LttTime window_end = ltt_time_add(time_window.time_width, - time_window.start_time); -#if 0 - convert_time_to_pixels( - time_window.start_time, - window_end, - cfd->drawing->last_start, - drawing->width, - &x); - -#endif //0 convert_time_to_pixels( - time_window.start_time, - window_end, + time_window, end_time, drawing->width, &x_end); x = drawing->damage_begin; - // x_end = drawing->damage_end; + width = x_end - x; drawing->damage_begin = x+width; - //drawing->damage_end = drawing->width; - /* ask for the buffer to be redrawn */ - - //gtk_widget_queue_draw_area ( drawing->drawing_area, - // 0, 0, - // drawing->width, drawing->height); - - /* FIXME - * will need more precise pixel_to_time and time_to_pixel conversion - * functions to redraw only the needed area. */ gtk_widget_queue_draw_area ( drawing->drawing_area, x, 0, - width, drawing->height); + width, drawing->drawing_area->allocation.height); } @@ -487,17 +509,21 @@ configure_event( GtkWidget *widget, GdkEventConfigure *event, g_debug("New alloc draw size : %i by %i",widget->allocation.width, widget->allocation.height); - - if (drawing->pixmap) - gdk_pixmap_unref(drawing->pixmap); - drawing->width = widget->allocation.width; + + if(drawing->alloc_width < widget->allocation.width) { + if(drawing->pixmap) + gdk_pixmap_unref(drawing->pixmap); + + drawing->pixmap = gdk_pixmap_new(widget->window, + drawing->width + SAFETY + EXTRA_ALLOC, + drawing->height + EXTRA_ALLOC, + -1); + drawing->alloc_width = drawing->width + SAFETY + EXTRA_ALLOC; + drawing->alloc_height = drawing->height + EXTRA_ALLOC; + } //drawing->height = widget->allocation.height; - drawing->pixmap = gdk_pixmap_new(widget->window, - drawing->width + SAFETY, - drawing->height, - -1); //ProcessList_get_height // (GuiControlFlow_get_process_list(drawing->control_flow_data)), @@ -551,6 +577,10 @@ expose_event( GtkWidget *widget, GdkEventExpose *event, gpointer user_data ) (ControlFlowData*)g_object_get_data( G_OBJECT(widget), "control_flow_data"); + if(unlikely(drawing->gc == NULL)) { + drawing->gc = gdk_gc_new(drawing->drawing_area->window); + gdk_gc_copy(drawing->gc, drawing->drawing_area->style->black_gc); + } TimeWindow time_window = lttvwindow_get_time_window(control_flow_data->tab); @@ -559,9 +589,7 @@ expose_event( GtkWidget *widget, GdkEventExpose *event, gpointer user_data ) guint cursor_x=0; - LttTime window_end = ltt_time_add(time_window.time_width, - time_window.start_time); - + LttTime window_end = time_window.end_time; /* update the screen from the pixmap buffer */ gdk_draw_pixmap(widget->window, @@ -571,14 +599,24 @@ expose_event( GtkWidget *widget, GdkEventExpose *event, gpointer user_data ) event->area.x, event->area.y, event->area.width, event->area.height); - + /* Erase the dotted lines left.. */ + if(widget->allocation.height > drawing->height) + { + gdk_draw_rectangle (widget->window, + drawing->drawing_area->style->black_gc, + TRUE, + event->area.x, drawing->height, + event->area.width, // do not overlap + widget->allocation.height - drawing->height); +g_critical("blah : %u, %u", widget->allocation.height, drawing->height); + } + if(ltt_time_compare(time_window.start_time, current_time) <= 0 && ltt_time_compare(window_end, current_time) >= 0) { /* Draw the dotted lines */ convert_time_to_pixels( - time_window.start_time, - window_end, + time_window, current_time, drawing->width, &cursor_x); @@ -600,11 +638,11 @@ expose_event( GtkWidget *widget, GdkEventExpose *event, gpointer user_data ) dash_list, 2); } - - drawing_draw_line(NULL, widget->window, + + gdk_draw_line(widget->window, + drawing->dotted_gc, cursor_x, 0, - cursor_x, drawing->height, - drawing->dotted_gc); + cursor_x, widget->allocation.height); } return FALSE; } @@ -659,16 +697,11 @@ button_press_event( GtkWidget *widget, GdkEventButton *event, gpointer user_data { LttTime time; - LttTime window_end = ltt_time_add(time_window.time_width, - time_window.start_time); - - /* left mouse button click */ g_debug("x click is : %f", event->x); convert_pixels_to_time(drawing->width, (guint)event->x, - time_window.start_time, - window_end, + time_window, &time); lttvwindow_report_current_time(control_flow_data->tab, time); @@ -756,6 +789,8 @@ Drawing_t *drawing_construct(ControlFlowData *control_flow_data) drawing->height = 1; drawing->width = 1; drawing->depth = 0; + drawing->alloc_height = 1; + drawing->alloc_width = 1; drawing->damage_begin = 0; drawing->damage_end = 0; @@ -847,6 +882,11 @@ Drawing_t *drawing_construct(ControlFlowData *control_flow_data) gtk_widget_show(drawing->scrollbar); gtk_widget_show(drawing->hbox); + /* Allocate the colors */ + GdkColormap* colormap = gdk_colormap_get_system(); + gboolean success[NUM_COLORS]; + gdk_colormap_alloc_colors(colormap, drawing_colors, NUM_COLORS, FALSE, + TRUE, success); return drawing; } @@ -854,6 +894,14 @@ Drawing_t *drawing_construct(ControlFlowData *control_flow_data) void drawing_destroy(Drawing_t *drawing) { g_info("drawing_destroy %p", drawing); + + /* Free the colors */ + GdkColormap* colormap = gdk_colormap_get_system(); + + gdk_colormap_free_colors(colormap, drawing_colors, NUM_COLORS); + + + // Do not unref here, Drawing_t destroyed by it's widget. //g_object_unref( G_OBJECT(drawing->drawing_area)); if(drawing->gc != NULL) @@ -875,53 +923,6 @@ GtkWidget *drawing_get_widget(Drawing_t *drawing) return drawing->vbox; } -/* convert_pixels_to_time - * - * Convert from window pixel and time interval to an absolute time. - */ -__inline void convert_pixels_to_time( - gint width, - guint x, - LttTime window_time_begin, - LttTime window_time_end, - LttTime *time) -{ - LttTime window_time_interval; - guint64 time_ll; - - window_time_interval = ltt_time_sub(window_time_end, - window_time_begin); - time_ll = ltt_time_to_uint64(window_time_interval); - time_ll = time_ll * x / width; - *time = ltt_time_from_uint64(time_ll); - *time = ltt_time_add(window_time_begin, *time); -} - - -__inline void convert_time_to_pixels( - LttTime window_time_begin, - LttTime window_time_end, - LttTime time, - int width, - guint *x) -{ - LttTime window_time_interval; - guint64 time_ll, interval_ll; - - g_assert(ltt_time_compare(window_time_begin, time) <= 0 && - ltt_time_compare(window_time_end, time) >= 0); - - window_time_interval = ltt_time_sub(window_time_end,window_time_begin); - - time = ltt_time_sub(time, window_time_begin); - - time_ll = ltt_time_to_uint64(time); - interval_ll = ltt_time_to_uint64(window_time_interval); - - *x = (guint)(time_ll * width / interval_ll); - -} - void drawing_draw_line( Drawing_t *drawing, GdkPixmap *pixmap, guint x1, guint y1, @@ -941,9 +942,11 @@ void drawing_clear(Drawing_t *drawing) drawing->height = 1; /* Allocate a new pixmap with new height */ drawing->pixmap = gdk_pixmap_new(drawing->drawing_area->window, - drawing->width + SAFETY, - drawing->height, + drawing->width + SAFETY + EXTRA_ALLOC, + drawing->height + EXTRA_ALLOC, -1); + drawing->alloc_width = drawing->width + SAFETY + EXTRA_ALLOC; + drawing->alloc_height = drawing->height + EXTRA_ALLOC; gtk_widget_set_size_request(drawing->drawing_area, -1, @@ -951,9 +954,7 @@ void drawing_clear(Drawing_t *drawing) gtk_widget_queue_resize_no_redraw(drawing->drawing_area); /* ask for the buffer to be redrawn */ - gtk_widget_queue_draw_area ( drawing->drawing_area, - 0, 0, - drawing->width, drawing->height); + gtk_widget_queue_draw ( drawing->drawing_area); } @@ -964,36 +965,47 @@ void drawing_insert_square(Drawing_t *drawing, guint height) { //GdkRectangle update_rect; + gboolean reallocate = FALSE; + GdkPixmap *new_pixmap; /* Allocate a new pixmap with new height */ - GdkPixmap *pixmap = gdk_pixmap_new(drawing->drawing_area->window, - drawing->width + SAFETY, - drawing->height + height, - -1); - - /* Copy the high region */ - gdk_draw_drawable (pixmap, - drawing->drawing_area->style->black_gc, - drawing->pixmap, - 0, 0, - 0, 0, - drawing->width + SAFETY, y); + if(drawing->alloc_height < drawing->height + height) { + new_pixmap = gdk_pixmap_new(drawing->drawing_area->window, + drawing->width + SAFETY + EXTRA_ALLOC, + drawing->height + height + EXTRA_ALLOC, + -1); + drawing->alloc_width = drawing->width + SAFETY + EXTRA_ALLOC; + drawing->alloc_height = drawing->height + height + EXTRA_ALLOC; + reallocate = TRUE; + /* Copy the high region */ + gdk_draw_drawable (new_pixmap, + drawing->drawing_area->style->black_gc, + drawing->pixmap, + 0, 0, + 0, 0, + drawing->width + SAFETY, y); + } else { + new_pixmap = drawing->pixmap; + } + //GdkPixmap *pixmap = gdk_pixmap_new(drawing->drawing_area->window, + // drawing->width + SAFETY, + // drawing->height + height, + // -1); + /* add an empty square */ - gdk_draw_rectangle (pixmap, + gdk_draw_rectangle (new_pixmap, drawing->drawing_area->style->black_gc, TRUE, 0, y, drawing->width + SAFETY, // do not overlap height); - - /* copy the bottom of the region */ - gdk_draw_drawable (pixmap, + gdk_draw_drawable (new_pixmap, drawing->drawing_area->style->black_gc, drawing->pixmap, 0, y, @@ -1001,12 +1013,12 @@ void drawing_insert_square(Drawing_t *drawing, drawing->width+SAFETY, drawing->height - y); - if (drawing->pixmap) + if(reallocate && likely(drawing->pixmap)) { gdk_pixmap_unref(drawing->pixmap); - - drawing->pixmap = pixmap; + drawing->pixmap = new_pixmap; + } - if(drawing->height==1) drawing->height = height; + if(unlikely(drawing->height==1)) drawing->height = height; else drawing->height += height; gtk_widget_set_size_request(drawing->drawing_area, @@ -1028,20 +1040,23 @@ void drawing_remove_square(Drawing_t *drawing, { GdkPixmap *pixmap; - if(drawing->height == height) { - pixmap = gdk_pixmap_new( - drawing->drawing_area->window, - drawing->width + SAFETY, - 1, - -1); + if(unlikely((guint)drawing->height == height)) { + //pixmap = gdk_pixmap_new( + // drawing->drawing_area->window, + // drawing->width + SAFETY, + // 1, + // -1); + pixmap = drawing->pixmap; drawing->height=1; } else { /* Allocate a new pixmap with new height */ - pixmap = gdk_pixmap_new( - drawing->drawing_area->window, - drawing->width + SAFETY, - drawing->height - height, - -1); + //pixmap = gdk_pixmap_new( + // drawing->drawing_area->window, + // drawing->width + SAFETY, + // drawing->height - height, + // -1); + /* Keep the same preallocated pixmap */ + pixmap = drawing->pixmap; /* Copy the high region */ gdk_draw_drawable (pixmap, @@ -1062,10 +1077,10 @@ void drawing_remove_square(Drawing_t *drawing, drawing->height-=height; } - if (drawing->pixmap) - gdk_pixmap_unref(drawing->pixmap); + //if(likely(drawing->pixmap)) + // gdk_pixmap_unref(drawing->pixmap); - drawing->pixmap = pixmap; + //drawing->pixmap = pixmap; gtk_widget_set_size_request(drawing->drawing_area, -1, @@ -1099,23 +1114,21 @@ void drawing_update_ruler(Drawing_t *drawing, TimeWindow *time_window) static gboolean expose_ruler( GtkWidget *widget, GdkEventExpose *event, gpointer user_data ) { + /* ruler desactivated */ + return 0; Drawing_t *drawing = (Drawing_t*)user_data; TimeWindow time_window = lttvwindow_get_time_window(drawing->control_flow_data->tab); gchar text[255]; PangoContext *context; PangoLayout *layout; - PangoAttribute *attribute; PangoFontDescription *FontDesc; - gint Font_Size; PangoRectangle ink_rect; - guint global_width=0; + gint global_width=0; GdkColor foreground = { 0, 0, 0, 0 }; GdkColor background = { 0, 0xffff, 0xffff, 0xffff }; - LttTime window_end = - ltt_time_add(time_window.time_width, - time_window.start_time); + LttTime window_end = time_window.end_time; LttTime half_width = ltt_time_div(time_window.time_width,2.0); LttTime window_middle =