ltt/branches/poly/lttv/modules/gui/controlflow/drawing.c

   1 /* This file is part of the Linux Trace Toolkit viewer
   2  * Copyright (C) 2003-2004 Mathieu Desnoyers
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License Version 2 as
   6  * published by the Free Software Foundation;
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  16  * MA 02111-1307, USA.
  17  */
  18
  19 #include <gtk/gtk.h>
  20 #include <gdk/gdk.h>
  21
  22 #include <lttv/processTrace.h>
  23 #include <lttv/gtktraceset.h>
  24 #include <lttv/hook.h>
  25
  26 #include "drawing.h"
  27 #include "cfv.h"
  28 #include "cfv-private.h"
  29 #include "eventhooks.h"
  30
  31 #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format)
  32 #define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format)
  33
  34 /*****************************************************************************
  35  *                              drawing functions                            *
  36  *****************************************************************************/
  37
  38 static gboolean
  39 expose_ruler( GtkWidget *widget, GdkEventExpose *event, gpointer user_data );
  40
  41
  42
  43 //FIXME Colors will need to be dynamic. Graphic context part not done so far.
  44 typedef enum
  45 {
  46   RED,
  47   GREEN,
  48   BLUE,
  49   WHITE,
  50   BLACK
  51
  52 } ControlFlowColors;
  53
  54 /* Vector of unallocated colors */
  55 static GdkColor CF_Colors [] =
  56 {
  57   { 0, 0xffff, 0x0000, 0x0000 },  // RED
  58   { 0, 0x0000, 0xffff, 0x0000 },  // GREEN
  59   { 0, 0x0000, 0x0000, 0xffff },  // BLUE
  60   { 0, 0xffff, 0xffff, 0xffff },  // WHITE
  61   { 0, 0x0000, 0x0000, 0x0000 } // BLACK
  62 };
  63
  64
  65 /* Function responsible for updating the exposed area.
  66  * It must call processTrace() to ask for this update.
  67  * Note : this function cannot clear the background, because it may
  68  * erase drawing already present (SAFETY).
  69  */
  70 void drawing_data_request(Drawing_t *drawing,
  71       GdkPixmap **pixmap,
  72       gint x, gint y,
  73       gint width,
  74       gint height)
  75 {
  76   if(width < 0) return ;
  77   if(height < 0) return ;
  78   ControlFlowData *control_flow_data =
  79       (ControlFlowData*)g_object_get_data(
  80                 G_OBJECT(
  81                     drawing->drawing_area),
  82                 "control_flow_data");
  83
  84   LttTime start, end;
  85   LttTime window_end = ltt_time_add(control_flow_data->time_window.time_width,
  86                         control_flow_data->time_window.start_time);
  87
  88   g_critical("req : window_end : %u, %u", window_end.tv_sec,
  89                                       window_end.tv_nsec);
  90
  91   g_critical("req : time width : %u, %u", control_flow_data->time_window.time_width.tv_sec,
  92                                 control_flow_data->time_window.time_width.tv_nsec);
  93
  94   g_critical("x is : %i, x+width is : %i", x, x+width);
  95
  96   convert_pixels_to_time(drawing->drawing_area->allocation.width, x,
  97         &control_flow_data->time_window.start_time,
  98         &window_end,
  99         &start);
 100
 101   convert_pixels_to_time(drawing->drawing_area->allocation.width, x + width,
 102         &control_flow_data->time_window.start_time,
 103         &window_end,
 104         &end);
 105
 106   LttvTracesetContext * tsc =
 107         get_traceset_context(control_flow_data->mw);
 108
 109     //send_test_process(
 110   //guicontrolflow_get_process_list(drawing->control_flow_data),
 111   //drawing);
 112   //send_test_drawing(
 113   //guicontrolflow_get_process_list(drawing->control_flow_data),
 114   //drawing, *pixmap, x, y, width, height);
 115
 116   // Let's call processTrace() !!
 117   EventRequest event_request; // Variable freed at the end of the function.
 118   event_request.control_flow_data = control_flow_data;
 119   event_request.time_begin = start;
 120   event_request.time_end = end;
 121   event_request.x_begin = x;
 122   event_request.x_end = x+width;
 123
 124   g_critical("req : start : %u, %u", event_request.time_begin.tv_sec,
 125                                       event_request.time_begin.tv_nsec);
 126
 127   g_critical("req : end : %u, %u", event_request.time_end.tv_sec,
 128                                       event_request.time_end.tv_nsec);
 129
 130   LttvHooks *event = lttv_hooks_new();
 131   LttvHooks *after_event = lttv_hooks_new();
 132   LttvHooks *after_traceset = lttv_hooks_new();
 133   lttv_hooks_add(after_traceset, after_data_request, &event_request);
 134   lttv_hooks_add(event, draw_event_hook, &event_request);
 135   //Modified by xiangxiu: state update hooks are added by the main window
 136   //state_add_event_hooks_api(control_flow_data->mw);
 137   lttv_hooks_add(after_event, draw_after_hook, &event_request);
 138
 139   lttv_process_traceset_seek_time(tsc, start);
 140   // FIXME : would like to place the after_traceset hook after the traceset,
 141   // but the traceset context state is not valid anymore.
 142   lttv_traceset_context_add_hooks(tsc,
 143   //    NULL, after_traceset, NULL, NULL, NULL, NULL,
 144       NULL, NULL, NULL, NULL, NULL, NULL,
 145       NULL, after_traceset, NULL, event, after_event);
 146   lttv_process_traceset(tsc, end, G_MAXULONG);
 147   //after_data_request((void*)&event_request,(void*)tsc);
 148   lttv_traceset_context_remove_hooks(tsc,
 149       //NULL, after_traceset, NULL, NULL, NULL, NULL,
 150       NULL, NULL, NULL, NULL, NULL, NULL,
 151       NULL, after_traceset, NULL, event, after_event);
 152   //Modified by xiangxiu: state update hooks are removed by the main window
 153   //state_remove_event_hooks_api(control_flow_data->mw);
 154
 155   lttv_hooks_destroy(after_traceset);
 156   lttv_hooks_destroy(event);
 157   lttv_hooks_destroy(after_event);
 158
 159
 160 }
 161
 162 /* Callbacks */
 163
 164
 165 /* Create a new backing pixmap of the appropriate size */
 166 /* As the scaling will always change, it's of no use to copy old
 167  * pixmap.
 168  */
 169 static gboolean
 170 configure_event( GtkWidget *widget, GdkEventConfigure *event,
 171     gpointer user_data)
 172 {
 173   Drawing_t *drawing = (Drawing_t*)user_data;
 174
 175
 176   /* First, get the new time interval of the main window */
 177   /* we assume (see documentation) that the main window
 178    * has updated the time interval before this configure gets
 179    * executed.
 180    */
 181   get_time_window(drawing->control_flow_data->mw,
 182         &drawing->control_flow_data->time_window);
 183
 184   /* New pixmap, size of the configure event */
 185   //GdkPixmap *pixmap = gdk_pixmap_new(widget->window,
 186   //      widget->allocation.width + SAFETY,
 187   //      widget->allocation.height + SAFETY,
 188   //      -1);
 189
 190   g_critical("drawing configure event");
 191   g_critical("New draw size : %i by %i",widget->allocation.width, widget->allocation.height);
 192
 193
 194   if (drawing->pixmap)
 195     gdk_pixmap_unref(drawing->pixmap);
 196
 197   /* If no old pixmap present */
 198   //if(drawing->pixmap == NULL)
 199   {
 200     drawing->pixmap = gdk_pixmap_new(
 201     widget->window,
 202     widget->allocation.width + SAFETY,
 203     widget->allocation.height + SAFETY,
 204     //ProcessList_get_height
 205     // (GuiControlFlow_get_process_list(drawing->control_flow_data)),
 206     -1);
 207     drawing->width = widget->allocation.width;
 208     drawing->height = widget->allocation.height;
 209
 210
 211     // Clear the image
 212     gdk_draw_rectangle (drawing->pixmap,
 213           widget->style->black_gc,
 214           TRUE,
 215           0, 0,
 216           widget->allocation.width+SAFETY,
 217           widget->allocation.height+SAFETY);
 218
 219     //g_info("init data request");
 220
 221
 222     /* Initial data request */
 223     // Do not need to ask for data of 1 pixel : not synchronized with
 224     // main window time at this moment.
 225     drawing_data_request(drawing, &drawing->pixmap, 0, 0,
 226         widget->allocation.width,
 227         widget->allocation.height);
 228
 229     drawing->width = widget->allocation.width;
 230     drawing->height = widget->allocation.height;
 231
 232     return TRUE;
 233
 234
 235
 236   }
 237 #ifdef NOTUSE
 238 //  /* Draw empty background */
 239 //  gdk_draw_rectangle (pixmap,
 240 //          widget->style->black_gc,
 241 //          TRUE,
 242 //          0, 0,
 243 //          widget->allocation.width,
 244 //          widget->allocation.height);
 245
 246   /* Copy old data to new pixmap */
 247   gdk_draw_drawable (pixmap,
 248     widget->style->black_gc,
 249     drawing->pixmap,
 250     0, 0,
 251     0, 0,
 252     -1, -1);
 253
 254   if (drawing->pixmap)
 255     gdk_pixmap_unref(drawing->pixmap);
 256
 257   drawing->pixmap = pixmap;
 258
 259   // Clear the bottom part of the image (SAFETY)
 260   gdk_draw_rectangle (pixmap,
 261           widget->style->black_gc,
 262           TRUE,
 263           0, drawing->height+SAFETY,
 264           drawing->width+SAFETY,  // do not overlap
 265           (widget->allocation.height) - drawing->height);
 266
 267   // Clear the right part of the image (SAFETY)
 268   gdk_draw_rectangle (pixmap,
 269           widget->style->black_gc,
 270           TRUE,
 271           drawing->width+SAFETY, 0,
 272           (widget->allocation.width) - drawing->width,  // do not overlap
 273           drawing->height+SAFETY);
 274
 275   /* Clear the backgound for data request, but not SAFETY */
 276   gdk_draw_rectangle (pixmap,
 277           drawing->drawing_area->style->black_gc,
 278           TRUE,
 279           drawing->width + SAFETY, 0,
 280           widget->allocation.width - drawing->width,  // do not overlap
 281           widget->allocation.height+SAFETY);
 282
 283   /* Request data for missing space */
 284   g_info("missing data request");
 285   drawing_data_request(drawing, &pixmap, drawing->width, 0,
 286       widget->allocation.width - drawing->width,
 287       widget->allocation.height);
 288
 289   drawing->width = widget->allocation.width;
 290   drawing->height = widget->allocation.height;
 291
 292   return TRUE;
 293 #endif //NOTUSE
 294 }
 295
 296
 297 /* Redraw the screen from the backing pixmap */
 298 static gboolean
 299 expose_event( GtkWidget *widget, GdkEventExpose *event, gpointer user_data )
 300 {
 301   Drawing_t *drawing = (Drawing_t*)user_data;
 302   ControlFlowData *control_flow_data =
 303       (ControlFlowData*)g_object_get_data(
 304                 G_OBJECT(widget),
 305                 "control_flow_data");
 306
 307   g_critical("drawing expose event");
 308
 309   guint x=0;
 310   LttTime* current_time =
 311       guicontrolflow_get_current_time(control_flow_data);
 312
 313   LttTime window_end = ltt_time_add(control_flow_data->time_window.time_width,
 314                       control_flow_data->time_window.start_time);
 315
 316   convert_time_to_pixels(
 317         control_flow_data->time_window.start_time,
 318         window_end,
 319         *current_time,
 320         widget->allocation.width,
 321         &x);
 322
 323   gdk_draw_pixmap(widget->window,
 324       widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
 325       drawing->pixmap,
 326       event->area.x, event->area.y,
 327       event->area.x, event->area.y,
 328       event->area.width, event->area.height);
 329
 330   if(x >= event->area.x && x <= event->area.x+event->area.width)
 331   {
 332     gint8 dash_list[] = { 1, 2 };
 333     GdkGC *gc = gdk_gc_new(control_flow_data->drawing->pixmap);
 334     gdk_gc_copy(gc, widget->style->white_gc);
 335     gdk_gc_set_line_attributes(gc,
 336                                1,
 337                                GDK_LINE_ON_OFF_DASH,
 338                                GDK_CAP_BUTT,
 339                                GDK_JOIN_MITER);
 340     gdk_gc_set_dashes(gc,
 341                       0,
 342                       dash_list,
 343                       2);
 344     drawing_draw_line(NULL, widget->window,
 345                   x, event->area.y,
 346                   x, event->area.y+event->area.height,
 347                   gc);
 348     gdk_gc_unref(gc);
 349   }
 350   return FALSE;
 351 }
 352
 353 /* mouse click */
 354 static gboolean
 355 button_press_event( GtkWidget *widget, GdkEventButton *event, gpointer user_data )
 356 {
 357   ControlFlowData *control_flow_data =
 358       (ControlFlowData*)g_object_get_data(
 359                 G_OBJECT(widget),
 360                 "control_flow_data");
 361   Drawing_t *drawing = control_flow_data->drawing;
 362
 363
 364   g_critical("click");
 365   if(event->button == 1)
 366   {
 367     LttTime time;
 368
 369     LttTime window_end = ltt_time_add(control_flow_data->time_window.time_width,
 370                         control_flow_data->time_window.start_time);
 371
 372
 373     /* left mouse button click */
 374     g_critical("x click is : %f", event->x);
 375
 376     convert_pixels_to_time(widget->allocation.width, (guint)event->x,
 377         &control_flow_data->time_window.start_time,
 378         &window_end,
 379         &time);
 380
 381     set_current_time(control_flow_data->mw, &time);
 382
 383   }
 384
 385   return FALSE;
 386 }
 387
 388
 389
 390
 391 Drawing_t *drawing_construct(ControlFlowData *control_flow_data)
 392 {
 393   Drawing_t *drawing = g_new(Drawing_t, 1);
 394
 395   drawing->control_flow_data = control_flow_data;
 396
 397   drawing->vbox = gtk_vbox_new(FALSE, 1);
 398
 399   drawing->ruler = gtk_drawing_area_new ();
 400   gtk_widget_set_size_request(drawing->ruler, -1, 27);
 401
 402
 403   drawing->drawing_area = gtk_drawing_area_new ();
 404
 405   gtk_box_pack_start(GTK_BOX(drawing->vbox), drawing->ruler,
 406                      FALSE, FALSE, 0);
 407   //g_object_unref(G_OBJECT(drawing->ruler));
 408   gtk_box_pack_end(GTK_BOX(drawing->vbox), drawing->drawing_area,
 409                    TRUE, TRUE, 0);
 410   //g_object_unref(G_OBJECT(drawing->drawing_area));
 411
 412   drawing->pango_layout =
 413     gtk_widget_create_pango_layout(drawing->drawing_area, NULL);
 414
 415   //gtk_widget_set_size_request(drawing->drawing_area->window, 50, 50);
 416   g_object_set_data_full(
 417       G_OBJECT(drawing->drawing_area),
 418       "Link_drawing_Data",
 419       drawing,
 420       (GDestroyNotify)drawing_destroy);
 421
 422   g_object_set_data(
 423       G_OBJECT(drawing->ruler),
 424       "drawing",
 425       drawing);
 426
 427
 428   //gtk_widget_modify_bg( drawing->drawing_area,
 429   //      GTK_STATE_NORMAL,
 430   //      &CF_Colors[BLACK]);
 431
 432   //gdk_window_get_geometry(drawing->drawing_area->window,
 433   //    NULL, NULL,
 434   //    &(drawing->width),
 435   //    &(drawing->height),
 436   //    -1);
 437
 438   //drawing->pixmap = gdk_pixmap_new(
 439   //    drawing->drawing_area->window,
 440   //    drawing->width,
 441   //    drawing->height,
 442   //    drawing->depth);
 443
 444   drawing->pixmap = NULL;
 445
 446 //  drawing->pixmap = gdk_pixmap_new(drawing->drawing_area->window,
 447 //        drawing->drawing_area->allocation.width,
 448 //        drawing->drawing_area->allocation.height,
 449 //        -1);
 450
 451   gtk_widget_add_events(drawing->drawing_area, GDK_BUTTON_PRESS_MASK);
 452
 453   g_signal_connect (G_OBJECT(drawing->drawing_area),
 454         "configure_event",
 455         G_CALLBACK (configure_event),
 456         (gpointer)drawing);
 457
 458   g_signal_connect (G_OBJECT(drawing->ruler),
 459         "expose_event",
 460         G_CALLBACK(expose_ruler),
 461         (gpointer)drawing);
 462
 463   g_signal_connect (G_OBJECT(drawing->drawing_area),
 464         "expose_event",
 465         G_CALLBACK (expose_event),
 466         (gpointer)drawing);
 467
 468   g_signal_connect (G_OBJECT(drawing->drawing_area),
 469         "button-press-event",
 470         G_CALLBACK (button_press_event),
 471         (gpointer)drawing);
 472
 473   gtk_widget_show(drawing->ruler);
 474   gtk_widget_show(drawing->drawing_area);
 475
 476
 477   return drawing;
 478 }
 479
 480 void drawing_destroy(Drawing_t *drawing)
 481 {
 482
 483   // Do not unref here, Drawing_t destroyed by it's widget.
 484   //g_object_unref( G_OBJECT(drawing->drawing_area));
 485
 486   g_free(drawing->pango_layout);
 487   g_free(drawing);
 488 }
 489
 490 GtkWidget *drawing_get_drawing_area(Drawing_t *drawing)
 491 {
 492   return drawing->drawing_area;
 493 }
 494
 495 GtkWidget *drawing_get_widget(Drawing_t *drawing)
 496 {
 497   return drawing->vbox;
 498 }
 499
 500 /* convert_pixels_to_time
 501  *
 502  * Convert from window pixel and time interval to an absolute time.
 503  */
 504 void convert_pixels_to_time(
 505     gint width,
 506     guint x,
 507     LttTime *window_time_begin,
 508     LttTime *window_time_end,
 509     LttTime *time)
 510 {
 511   LttTime window_time_interval;
 512
 513   window_time_interval = ltt_time_sub(*window_time_end,
 514             *window_time_begin);
 515   *time = ltt_time_mul(window_time_interval, (x/(float)width));
 516   *time = ltt_time_add(*window_time_begin, *time);
 517 }
 518
 519
 520
 521 void convert_time_to_pixels(
 522     LttTime window_time_begin,
 523     LttTime window_time_end,
 524     LttTime time,
 525     int width,
 526     guint *x)
 527 {
 528   LttTime window_time_interval;
 529   float interval_float, time_float;
 530
 531   window_time_interval = ltt_time_sub(window_time_end,window_time_begin);
 532
 533   time = ltt_time_sub(time, window_time_begin);
 534
 535   interval_float = ltt_time_to_double(window_time_interval);
 536   time_float = ltt_time_to_double(time);
 537
 538   *x = (guint)(time_float/interval_float * width);
 539
 540 }
 541
 542 void drawing_refresh (  Drawing_t *drawing,
 543       guint x, guint y,
 544       guint width, guint height)
 545 {
 546   g_info("Drawing.c : drawing_refresh %u, %u, %u, %u", x, y, width, height);
 547   GdkRectangle update_rect;
 548
 549   gdk_draw_drawable(
 550     drawing->drawing_area->window,
 551     drawing->drawing_area->
 552      style->fg_gc[GTK_WIDGET_STATE (drawing->drawing_area)],
 553     GDK_DRAWABLE(drawing->pixmap),
 554     x, y,
 555     x, y,
 556     width, height);
 557
 558   update_rect.x = 0 ;
 559   update_rect.y = 0 ;
 560   update_rect.width = drawing->width;
 561   update_rect.height = drawing->height ;
 562   gtk_widget_draw( drawing->drawing_area, &update_rect);
 563
 564 }
 565
 566
 567 void drawing_draw_line( Drawing_t *drawing,
 568       GdkPixmap *pixmap,
 569       guint x1, guint y1,
 570       guint x2, guint y2,
 571       GdkGC *GC)
 572 {
 573   gdk_draw_line (pixmap,
 574       GC,
 575       x1, y1, x2, y2);
 576 }
 577
 578
 579
 580
 581 void drawing_resize(Drawing_t *drawing, guint h, guint w)
 582 {
 583   drawing->height = h ;
 584   drawing->width = w ;
 585
 586   gtk_widget_set_size_request ( drawing->drawing_area,
 587           drawing->width,
 588           drawing->height);
 589
 590
 591 }
 592
 593
 594 /* Insert a square corresponding to a new process in the list */
 595 /* Applies to whole drawing->width */
 596 void drawing_insert_square(Drawing_t *drawing,
 597         guint y,
 598         guint height)
 599 {
 600   //GdkRectangle update_rect;
 601
 602   /* Allocate a new pixmap with new height */
 603   GdkPixmap *pixmap = gdk_pixmap_new(drawing->drawing_area->window,
 604         drawing->width + SAFETY,
 605         drawing->height + height + SAFETY,
 606         -1);
 607
 608   /* Copy the high region */
 609   gdk_draw_drawable (pixmap,
 610     drawing->drawing_area->style->black_gc,
 611     drawing->pixmap,
 612     0, 0,
 613     0, 0,
 614     drawing->width + SAFETY, y);
 615
 616
 617
 618
 619   /* add an empty square */
 620   gdk_draw_rectangle (pixmap,
 621     drawing->drawing_area->style->black_gc,
 622     TRUE,
 623     0, y,
 624     drawing->width + SAFETY,  // do not overlap
 625     height);
 626
 627
 628
 629   /* copy the bottom of the region */
 630   gdk_draw_drawable (pixmap,
 631     drawing->drawing_area->style->black_gc,
 632     drawing->pixmap,
 633     0, y,
 634     0, y + height,
 635     drawing->width+SAFETY, drawing->height - y + SAFETY);
 636
 637
 638
 639
 640   if (drawing->pixmap)
 641     gdk_pixmap_unref(drawing->pixmap);
 642
 643   drawing->pixmap = pixmap;
 644
 645   drawing->height+=height;
 646
 647   /* Rectangle to update, from new drawing dimensions */
 648   //update_rect.x = 0 ;
 649   //update_rect.y = y ;
 650   //update_rect.width = drawing->width;
 651   //update_rect.height = drawing->height - y ;
 652   //gtk_widget_draw( drawing->drawing_area, &update_rect);
 653 }
 654
 655
 656 /* Remove a square corresponding to a removed process in the list */
 657 void drawing_remove_square(Drawing_t *drawing,
 658         guint y,
 659         guint height)
 660 {
 661   //GdkRectangle update_rect;
 662
 663   /* Allocate a new pixmap with new height */
 664   GdkPixmap *pixmap = gdk_pixmap_new(
 665       drawing->drawing_area->window,
 666       drawing->width + SAFETY,
 667       drawing->height - height + SAFETY,
 668       -1);
 669
 670   /* Copy the high region */
 671   gdk_draw_drawable (pixmap,
 672     drawing->drawing_area->style->black_gc,
 673     drawing->pixmap,
 674     0, 0,
 675     0, 0,
 676     drawing->width + SAFETY, y);
 677
 678
 679
 680   /* Copy up the bottom of the region */
 681   gdk_draw_drawable (pixmap,
 682     drawing->drawing_area->style->black_gc,
 683     drawing->pixmap,
 684     0, y + height,
 685     0, y,
 686     drawing->width, drawing->height - y - height + SAFETY);
 687
 688
 689   if (drawing->pixmap)
 690     gdk_pixmap_unref(drawing->pixmap);
 691
 692   drawing->pixmap = pixmap;
 693
 694   drawing->height-=height;
 695
 696   /* Rectangle to update, from new drawing dimensions */
 697   //update_rect.x = 0 ;
 698   //update_rect.y = y ;
 699   //update_rect.width = drawing->width;
 700   //update_rect.height = drawing->height - y ;
 701   //gtk_widget_draw( drawing->drawing_area, &update_rect);
 702 }
 703
 704 void drawing_update_ruler(Drawing_t *drawing, TimeWindow *time_window)
 705 {
 706   GtkRequisition req;
 707   GdkRectangle rect;
 708
 709   req.width = drawing->ruler->allocation.width;
 710   req.height = drawing->ruler->allocation.height;
 711
 712
 713   rect.x = 0;
 714   rect.y = 0;
 715   rect.width = req.width;
 716   rect.height = req.height;
 717
 718   gtk_widget_queue_draw(drawing->ruler);
 719   //gtk_widget_draw( drawing->ruler, &rect);
 720 }
 721
 722 /* Redraw the ruler */
 723 static gboolean
 724 expose_ruler( GtkWidget *widget, GdkEventExpose *event, gpointer user_data )
 725 {
 726   Drawing_t *drawing = (Drawing_t*)user_data;
 727
 728   gchar text[255];
 729
 730   PangoContext *context;
 731   PangoLayout *layout;
 732   PangoAttribute *attribute;
 733   PangoFontDescription *FontDesc;
 734   gint Font_Size;
 735   PangoRectangle ink_rect;
 736   guint global_width=0;
 737   GdkColor foreground = { 0, 0, 0, 0 };
 738   GdkColor background = { 0, 0xffff, 0xffff, 0xffff };
 739
 740   LttTime window_end =
 741     ltt_time_add(drawing->control_flow_data->time_window.time_width,
 742                  drawing->control_flow_data->time_window.start_time);
 743   LttTime half_width =
 744     ltt_time_div(drawing->control_flow_data->time_window.time_width,2.0);
 745   LttTime window_middle =
 746     ltt_time_add(half_width,
 747                  drawing->control_flow_data->time_window.start_time);
 748   g_critical("ruler expose event");
 749
 750   gdk_draw_rectangle (drawing->ruler->window,
 751           drawing->ruler->style->white_gc,
 752           TRUE,
 753           event->area.x, event->area.y,
 754           event->area.width,
 755           event->area.height);
 756
 757    GdkGC *gc = gdk_gc_new(drawing->ruler->window);
 758    gdk_gc_copy(gc, drawing->ruler->style->black_gc);
 759    gdk_gc_set_line_attributes(gc,
 760                                2,
 761                                GDK_LINE_SOLID,
 762                                GDK_CAP_BUTT,
 763                                GDK_JOIN_MITER);
 764   gdk_draw_line (drawing->ruler->window,
 765                   gc,
 766                   event->area.x, 1,
 767                   event->area.x + event->area.width, 1);
 768
 769
 770   snprintf(text, 255, "%lus\n%luns",
 771     drawing->control_flow_data->time_window.start_time.tv_sec,
 772     drawing->control_flow_data->time_window.start_time.tv_nsec);
 773
 774   layout = gtk_widget_create_pango_layout(drawing->drawing_area, NULL);
 775
 776   context = pango_layout_get_context(layout);
 777   FontDesc = pango_context_get_font_description(context);
 778
 779   pango_font_description_set_size(FontDesc, 6*PANGO_SCALE);
 780   pango_layout_context_changed(layout);
 781
 782   pango_layout_set_text(layout, text, -1);
 783   pango_layout_get_pixel_extents(layout, &ink_rect, NULL);
 784   global_width += ink_rect.width;
 785
 786   gdk_draw_layout_with_colors(drawing->ruler->window,
 787       gc,
 788       0,
 789       6,
 790       layout, &foreground, &background);
 791
 792   gdk_gc_set_line_attributes(gc,
 793                              2,
 794                              GDK_LINE_SOLID,
 795                              GDK_CAP_ROUND,
 796                              GDK_JOIN_ROUND);
 797
 798   gdk_draw_line (drawing->ruler->window,
 799                    gc,
 800                    1, 1,
 801                    1, 7);
 802
 803
 804   snprintf(text, 255, "%lus\n%luns", window_end.tv_sec,
 805                                      window_end.tv_nsec);
 806
 807   pango_layout_set_text(layout, text, -1);
 808   pango_layout_get_pixel_extents(layout, &ink_rect, NULL);
 809   global_width += ink_rect.width;
 810
 811   if(global_width <= drawing->ruler->allocation.width)
 812   {
 813     gdk_draw_layout_with_colors(drawing->ruler->window,
 814       gc,
 815       drawing->ruler->allocation.width - ink_rect.width,
 816       6,
 817       layout, &foreground, &background);
 818
 819     gdk_gc_set_line_attributes(gc,
 820                                2,
 821                                GDK_LINE_SOLID,
 822                                GDK_CAP_ROUND,
 823                                GDK_JOIN_ROUND);
 824
 825     gdk_draw_line (drawing->ruler->window,
 826                    gc,
 827                    drawing->ruler->allocation.width-1, 1,
 828                    drawing->ruler->allocation.width-1, 7);
 829   }
 830
 831
 832   snprintf(text, 255, "%lus\n%luns", window_middle.tv_sec,
 833                                      window_middle.tv_nsec);
 834
 835   pango_layout_set_text(layout, text, -1);
 836   pango_layout_get_pixel_extents(layout, &ink_rect, NULL);
 837   global_width += ink_rect.width;
 838
 839   if(global_width <= drawing->ruler->allocation.width)
 840   {
 841     gdk_draw_layout_with_colors(drawing->ruler->window,
 842       gc,
 843       (drawing->ruler->allocation.width - ink_rect.width)/2,
 844       6,
 845       layout, &foreground, &background);
 846
 847     gdk_gc_set_line_attributes(gc,
 848                                2,
 849                                GDK_LINE_SOLID,
 850                                GDK_CAP_ROUND,
 851                                GDK_JOIN_ROUND);
 852
 853     gdk_draw_line (drawing->ruler->window,
 854                    gc,
 855                    drawing->ruler->allocation.width/2, 1,
 856                    drawing->ruler->allocation.width/2, 7);
 857
 858
 859
 860
 861   }
 862
 863   gdk_gc_unref(gc);
 864   g_object_unref(layout);
 865
 866   return FALSE;
 867 }
 868
 869