gtk2_ardour/canvas-simplerect.c

   1 #include <stdio.h>
   2 #include <math.h>
   3 #include <cairo.h>
   4 #include <libgnomecanvas/libgnomecanvas.h>
   5
   6 #include "canvas-simplerect.h"
   7 #include "rgb_macros.h"
   8 #include "gettext.h"
   9 #define _(Text)  dgettext (PACKAGE,Text)
  10
  11 enum {
  12         PROP_0,
  13         PROP_X1,
  14         PROP_Y1,
  15         PROP_X2,
  16         PROP_Y2,
  17         PROP_OUTLINE_PIXELS,
  18         PROP_OUTLINE_WHAT,
  19         PROP_FILL,
  20         PROP_FILL_COLOR_RGBA,
  21         PROP_OUTLINE_COLOR_RGBA,
  22         PROP_DRAW
  23
  24 };
  25
  26 static void   gnome_canvas_simplerect_class_init    (GnomeCanvasSimpleRectClass *class);
  27
  28 static void   gnome_canvas_simplerect_init          (GnomeCanvasSimpleRect      *simplerect);
  29
  30 static void   gnome_canvas_simplerect_destroy       (GtkObject                  *object);
  31
  32 static void   gnome_canvas_simplerect_set_property  (GObject        *object,
  33                                                      guint            prop_id,
  34                                                      const GValue   *value,
  35                                                      GParamSpec     *pspec);
  36
  37 static void   gnome_canvas_simplerect_get_property  (GObject        *object,
  38                                                      guint           prop_id,
  39                                                      GValue         *value,
  40                                                      GParamSpec     *pspec);
  41
  42 static void   gnome_canvas_simplerect_update        (GnomeCanvasItem *item,
  43                                                      double          *affine,
  44                                                      ArtSVP          *clip_path,
  45                                                      int              flags);
  46
  47 static void   gnome_canvas_simplerect_bounds        (GnomeCanvasItem *item,
  48                                                      double          *x1,
  49                                                      double          *y1,
  50                                                      double          *x2,
  51                                                      double          *y2);
  52
  53 static double gnome_canvas_simplerect_point         (GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item);
  54
  55 static void   gnome_canvas_simplerect_render        (GnomeCanvasItem *item, GnomeCanvasBuf *buf);
  56
  57 static void   gnome_canvas_simplerect_draw          (GnomeCanvasItem *item, GdkDrawable *drawable, int x, int y, int w, int h);
  58
  59 static GnomeCanvasItemClass *parent_class;
  60
  61
  62 GType
  63 gnome_canvas_simplerect_get_type (void)
  64 {
  65         static GType simplerect_type;
  66
  67         if (!simplerect_type) {
  68                 static const GTypeInfo object_info = {
  69                         sizeof (GnomeCanvasSimpleRectClass),
  70                         (GBaseInitFunc) NULL,
  71                         (GBaseFinalizeFunc) NULL,
  72                         (GClassInitFunc) gnome_canvas_simplerect_class_init,
  73                         (GClassFinalizeFunc) NULL,
  74                         NULL,                   /* class_data */
  75                         sizeof (GnomeCanvasSimpleRect),
  76                         0,                      /* n_preallocs */
  77                         (GInstanceInitFunc) gnome_canvas_simplerect_init,
  78                         NULL                    /* value_table */
  79                 };
  80
  81                 simplerect_type = g_type_register_static (GNOME_TYPE_CANVAS_ITEM, "GnomeCanvasSimpleRect",
  82                                                           &object_info, 0);
  83         }
  84
  85         return simplerect_type;
  86 }
  87
  88 static void
  89 gnome_canvas_simplerect_class_init (GnomeCanvasSimpleRectClass *class)
  90 {
  91         GObjectClass *gobject_class;
  92         GtkObjectClass *object_class;
  93         GnomeCanvasItemClass *item_class;
  94
  95         gobject_class = (GObjectClass *) class;
  96         object_class = (GtkObjectClass *) class;
  97         item_class = (GnomeCanvasItemClass *) class;
  98
  99         parent_class = g_type_class_peek_parent (class);
 100
 101         gobject_class->set_property = gnome_canvas_simplerect_set_property;
 102         gobject_class->get_property = gnome_canvas_simplerect_get_property;
 103
 104         g_object_class_install_property (gobject_class,
 105                                          PROP_X1,
 106                                          g_param_spec_double ("x1",
 107                                                               _("x1"),
 108                                                               _("x coordinate of upper left corner of rect"),
 109                                                               -G_MAXDOUBLE,
 110                                                               G_MAXDOUBLE,
 111                                                               0.0,
 112                                                               G_PARAM_READWRITE));
 113
 114         g_object_class_install_property (gobject_class,
 115                                          PROP_Y1,
 116                                          g_param_spec_double ("y1",
 117                                                               _("y1"),
 118                                                               _("y coordinate of upper left corner of rect "),
 119                                                               -G_MAXDOUBLE,
 120                                                               G_MAXDOUBLE,
 121                                                               0.0,
 122                                                               G_PARAM_READWRITE));
 123
 124
 125         g_object_class_install_property (gobject_class,
 126                                          PROP_X2,
 127                                          g_param_spec_double ("x2",
 128                                                               _("x2"),
 129                                                               _("x coordinate of lower right corner of rect"),
 130                                                               -G_MAXDOUBLE,
 131                                                               G_MAXDOUBLE,
 132                                                               0.0,
 133                                                               G_PARAM_READWRITE));
 134
 135         g_object_class_install_property (gobject_class,
 136                                          PROP_Y2,
 137                                          g_param_spec_double ("y2",
 138                                                               _("y2"),
 139                                                               _("y coordinate of lower right corner of rect "),
 140                                                               -G_MAXDOUBLE,
 141                                                               G_MAXDOUBLE,
 142                                                               0.0,
 143                                                               G_PARAM_READWRITE));
 144
 145
 146         g_object_class_install_property (gobject_class,
 147                                          PROP_OUTLINE_PIXELS,
 148                                          g_param_spec_uint ("outline_pixels",
 149                                                               _("outline pixels"),
 150                                                               _("width in pixels of outline"),
 151                                                               0,
 152                                                               G_MAXUINT,
 153                                                               0,
 154                                                               G_PARAM_READWRITE));
 155
 156
 157         g_object_class_install_property (gobject_class,
 158                                          PROP_OUTLINE_WHAT,
 159                                          g_param_spec_uint ("outline_what",
 160                                                               _("outline what"),
 161                                                               _("which boundaries to outline (mask)"),
 162                                                               0,
 163                                                               G_MAXUINT,
 164                                                               0,
 165                                                               G_PARAM_READWRITE));
 166
 167
 168
 169         g_object_class_install_property (gobject_class,
 170                                          PROP_FILL,
 171                                          g_param_spec_boolean ("fill",
 172                                                                _("fill"),
 173                                                                _("fill rectangle"),
 174                                                                TRUE,
 175                                                                G_PARAM_READWRITE));
 176
 177         g_object_class_install_property (gobject_class,
 178                                          PROP_DRAW,
 179                                          g_param_spec_boolean ("draw",
 180                                                                _("draw"),
 181                                                                _("draw rectangle"),
 182                                                                TRUE,
 183                                                                G_PARAM_READWRITE));
 184
 185
 186         g_object_class_install_property (gobject_class,
 187                                          PROP_OUTLINE_COLOR_RGBA,
 188                                          g_param_spec_uint ("outline_color_rgba",
 189                                                             _("outline color rgba"),
 190                                                             _("color of outline"),
 191                                                             0,
 192                                                             G_MAXUINT,
 193                                                             0,
 194                                                             G_PARAM_READWRITE));
 195
 196
 197         g_object_class_install_property (gobject_class,
 198                                          PROP_FILL_COLOR_RGBA,
 199                                          g_param_spec_uint ("fill_color_rgba",
 200                                                             _("fill color rgba"),
 201                                                             _("color of fill"),
 202                                                             0,
 203                                                             G_MAXUINT,
 204                                                             0,
 205                                                             G_PARAM_READWRITE));
 206
 207         object_class->destroy = gnome_canvas_simplerect_destroy;
 208
 209         item_class->update = gnome_canvas_simplerect_update;
 210         item_class->draw = gnome_canvas_simplerect_draw;
 211         item_class->bounds = gnome_canvas_simplerect_bounds;
 212         item_class->point = gnome_canvas_simplerect_point;
 213         item_class->render = gnome_canvas_simplerect_render;
 214
 215 }
 216
 217 static void
 218 gnome_canvas_simplerect_init (GnomeCanvasSimpleRect *simplerect)
 219 {
 220         simplerect->x1 = 0.0;
 221         simplerect->y1 = 0.0;
 222         simplerect->x2 = 0.0;
 223         simplerect->y2 = 0.0;
 224         simplerect->fill = TRUE;
 225         simplerect->draw = TRUE;
 226         simplerect->full_draw_on_update = TRUE;
 227         simplerect->fill_color = 0;
 228         simplerect->outline_color = 0;
 229         simplerect->outline_pixels = 1;
 230         simplerect->outline_what = 0xf;
 231 }
 232
 233 static void
 234 gnome_canvas_simplerect_destroy (GtkObject *object)
 235 {
 236         GnomeCanvasSimpleRect *rect;
 237
 238         g_return_if_fail (object != NULL);
 239         g_return_if_fail (GNOME_IS_CANVAS_SIMPLERECT (object));
 240
 241         rect = GNOME_CANVAS_SIMPLERECT (object);
 242
 243         /* remember, destroy can be run multiple times! */
 244
 245         if (GTK_OBJECT_CLASS (parent_class)->destroy)
 246               (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
 247 }
 248
 249 static void
 250 gnome_canvas_simplerect_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
 251 {
 252         GnomeCanvasSimpleRect *simplerect = GNOME_CANVAS_SIMPLERECT (item);
 253
 254         *x1 = simplerect->x1;
 255         *y1 = simplerect->y1;
 256         *x2 = simplerect->x2 + 1;
 257         *y2 = simplerect->y2 + 1;
 258
 259 }
 260
 261
 262 static void
 263 gnome_canvas_simplerect_reset_bounds (GnomeCanvasItem *item)
 264 {
 265         GnomeCanvasSimpleRect* simplerect;
 266         double x1, x2, y1, y2;
 267         double old_x1, old_x2, old_y1, old_y2;
 268         ArtDRect unionrect, old, new;
 269
 270         old_x1 = item->x1;
 271         old_y1 = item->y1;
 272         old_x2 = item->x2;
 273         old_y2 = item->y2;
 274
 275         gnome_canvas_simplerect_bounds (item, &x1, &y1, &x2, &y2);
 276         gnome_canvas_item_i2w (item, &x1, &y1);
 277         gnome_canvas_item_i2w (item, &x2, &y2);
 278
 279         item->x1 = x1;
 280         item->y1 = y1;
 281         item->x2 = x2;
 282         item->y2 = y2;
 283
 284         /* now compute bounding box in canvas units */
 285
 286         simplerect = GNOME_CANVAS_SIMPLERECT (item);
 287
 288         gnome_canvas_w2c (GNOME_CANVAS(item->canvas), x1, y1, &simplerect->bbox_ulx, &simplerect->bbox_uly);
 289         gnome_canvas_w2c (GNOME_CANVAS(item->canvas), x2, y2, &simplerect->bbox_lrx, &simplerect->bbox_lry);
 290
 291         /* now queue redraws for changed areas */
 292
 293         if (item->x1 == old_x1 && item->x2 == old_x2) {
 294
 295                 /* no change in x-axis position */
 296
 297                 if (item->y1 == old_y1) {
 298                         /* top didn't change, so just draw bottom */
 299
 300                         double start_y = MIN (item->y2, old_y2);
 301                         double end_y = MAX (item->y2, old_y2);
 302
 303                         gnome_canvas_request_redraw (item->canvas, item->x1, start_y - 0.5, item->x2, end_y + 1.5);
 304                         return;
 305
 306                 } else if (item->y2 == old_y2) {
 307
 308                         /* bottom didn't change, just draw top */
 309
 310                         double start_y = MIN (item->y1, old_y1);
 311                         double end_y = MAX (item->y1, old_y1);
 312
 313                         gnome_canvas_request_redraw (item->canvas, item->x1, start_y - 0.5, item->x2, end_y + 1.5);
 314                         return;
 315
 316                 }
 317
 318         } else if (item->y1 == old_y1 && item->y2 == old_y2) {
 319
 320                 /* no change in y-axis position */
 321
 322                 if (item->x1 == old_x1) {
 323                         /* start didn't change, so just draw at the end */
 324
 325                         double start_x = MIN (item->x2, old_x2);
 326                         double end_x = MAX (item->x2, old_x2);
 327
 328                         gnome_canvas_request_redraw (item->canvas, start_x - 0.5, item->y1, end_x + 1.5, item->y2);
 329                         return;
 330
 331                 } else if (item->x2 == old_x2) {
 332
 333                         /* end didn't change, so just draw at the start */
 334
 335                         double start_x = MIN (item->x1, old_x1);
 336                         double end_x = MAX (item->x1, old_x1);
 337
 338                         gnome_canvas_request_redraw (item->canvas, start_x - 0.5, item->y1, end_x + 1.5, item->y2 + 0.5);
 339                         return;
 340
 341                 }
 342         }
 343
 344         new.x0 = x1;
 345         new.y0 = y1;
 346         new.x1 = x2;
 347         new.y1 = y2;
 348
 349         old.x0 = old_x1;
 350         old.y0 = old_y1;
 351         old.x1 = old_x2;
 352         old.y1 = old_y2;
 353
 354         art_drect_union (&unionrect, &old, &new);
 355         gnome_canvas_request_redraw (item->canvas,
 356                                      unionrect.x0 - 0.5,
 357                                      unionrect.y0 - 0.5,
 358                                      unionrect.x1 + 1.5,
 359                                      unionrect.y1 + 1.5);
 360 }
 361
 362 /*
 363  * CANVAS CALLBACKS
 364  */
 365
 366 static void
 367 gnome_canvas_simplerect_set_property (GObject      *object,
 368                                       guint         prop_id,
 369                                       const GValue *value,
 370                                       GParamSpec   *pspec)
 371
 372 {
 373         GnomeCanvasSimpleRect *simplerect;
 374         int update = FALSE;
 375         int bounds_changed = FALSE;
 376         g_return_if_fail (object != NULL);
 377         g_return_if_fail (GNOME_IS_CANVAS_SIMPLERECT (object));
 378
 379         simplerect = GNOME_CANVAS_SIMPLERECT (object);
 380
 381         switch (prop_id) {
 382         case PROP_X1:
 383                 if (simplerect->x1 != g_value_get_double (value)) {
 384                         simplerect->x1 = g_value_get_double (value);
 385                         bounds_changed = TRUE;
 386                 }
 387                 break;
 388
 389         case PROP_Y1:
 390                 if (simplerect->y1 != g_value_get_double (value)) {
 391                         simplerect->y1 = g_value_get_double (value);
 392                         bounds_changed = TRUE;
 393                 }
 394                 break;
 395
 396         case PROP_X2:
 397                 if (simplerect->x2 != g_value_get_double (value)) {
 398                         simplerect->x2 = g_value_get_double (value);
 399                         bounds_changed = TRUE;
 400                 }
 401                 break;
 402
 403         case PROP_Y2:
 404                 if (simplerect->y2 != g_value_get_double (value)) {
 405                         simplerect->y2 = g_value_get_double (value);
 406                         bounds_changed = TRUE;
 407                 }
 408                 break;
 409
 410         case PROP_DRAW:
 411                 if (simplerect->draw != g_value_get_boolean (value)) {
 412                         simplerect->draw = g_value_get_boolean (value);
 413                         update = TRUE;
 414                 }
 415                 break;
 416
 417
 418         case PROP_FILL:
 419                 if (simplerect->fill != g_value_get_boolean (value)) {
 420                         simplerect->fill = g_value_get_boolean (value);
 421                         update = TRUE;
 422                 }
 423                 break;
 424
 425         case PROP_FILL_COLOR_RGBA:
 426                 if (simplerect->fill_color != g_value_get_uint(value)) {
 427                         simplerect->fill_color = g_value_get_uint(value);
 428                         update = TRUE;
 429                 }
 430                 break;
 431
 432         case PROP_OUTLINE_COLOR_RGBA:
 433                 if (simplerect->outline_color != g_value_get_uint(value)) {
 434                         simplerect->outline_color = g_value_get_uint(value);
 435                         update = TRUE;
 436                 }
 437                 break;
 438
 439         case PROP_OUTLINE_PIXELS:
 440                 if (simplerect->outline_pixels != g_value_get_uint(value)) {
 441                         simplerect->outline_pixels = g_value_get_uint(value);
 442                         update = TRUE;
 443                 }
 444                 break;
 445
 446         case PROP_OUTLINE_WHAT:
 447                 if (simplerect->outline_what != g_value_get_uint(value)) {
 448                         simplerect->outline_what = g_value_get_uint(value);
 449                         update = TRUE;
 450                 }
 451                 break;
 452
 453         default:
 454                 break;
 455         }
 456
 457         simplerect->full_draw_on_update = update;
 458
 459         if (update || bounds_changed) {
 460                 gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(object));
 461         }
 462 }
 463
 464 static void
 465 gnome_canvas_simplerect_get_property (GObject      *object,
 466                                       guint         prop_id,
 467                                       GValue       *value,
 468                                       GParamSpec   *pspec)
 469 {
 470         GnomeCanvasSimpleRect *rect = GNOME_CANVAS_SIMPLERECT (object);
 471
 472         g_return_if_fail (object != NULL);
 473         g_return_if_fail (GNOME_IS_CANVAS_SIMPLERECT (object));
 474
 475         switch (prop_id) {
 476         case PROP_X1:
 477                 g_value_set_double (value, rect->x1);
 478                 break;
 479         case PROP_X2:
 480                 g_value_set_double (value, rect->x2);
 481                 break;
 482         case PROP_Y1:
 483                 g_value_set_double (value, rect->y1);
 484                 break;
 485         case PROP_Y2:
 486                 g_value_set_double (value, rect->y2);
 487                 break;
 488         case PROP_OUTLINE_WHAT:
 489                 g_value_set_uint (value, rect->outline_what);
 490                 break;
 491         case PROP_FILL:
 492                 g_value_set_boolean (value, rect->fill);
 493                 break;
 494         case PROP_OUTLINE_PIXELS:
 495                 g_value_set_uint (value, rect->outline_pixels);
 496                 break;
 497         case PROP_FILL_COLOR_RGBA:
 498                 g_value_set_uint (value, rect->fill_color);
 499                 break;
 500         case PROP_OUTLINE_COLOR_RGBA:
 501                 g_value_set_uint (value, rect->outline_color);
 502                 break;
 503         case PROP_DRAW:
 504                 g_value_set_boolean (value, rect->draw);
 505                 break;
 506
 507         default:
 508                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 509                 break;
 510         }
 511 }
 512
 513
 514 static void
 515 gnome_canvas_simplerect_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
 516 {
 517         GnomeCanvasSimpleRect *simplerect;
 518         unsigned char foo;
 519
 520         simplerect = GNOME_CANVAS_SIMPLERECT (item);
 521
 522         if (parent_class->update)
 523                 (* parent_class->update) (item, affine, clip_path, flags);
 524
 525         gnome_canvas_simplerect_reset_bounds (item);
 526
 527         if (simplerect->full_draw_on_update) {
 528                 gnome_canvas_request_redraw (item->canvas,
 529                                            simplerect->bbox_ulx,
 530                                            simplerect->bbox_uly,
 531                                            simplerect->bbox_lrx+0.5,
 532                                            simplerect->bbox_lry+0.5);
 533                 simplerect->full_draw_on_update = FALSE;
 534         }
 535
 536         UINT_TO_RGBA (simplerect->fill_color, &simplerect->fill_r, &simplerect->fill_g, &simplerect->fill_b, &simplerect->fill_a);
 537         UINT_TO_RGBA (simplerect->outline_color, &simplerect->outline_r, &simplerect->outline_g, &simplerect->outline_b, &foo);
 538 }
 539
 540 // this can be useful for debugging/understanding how the canvas redraws
 541 // stuff.
 542
 543 #undef HARLEQUIN_DEBUGGING
 544
 545 #undef SIMPLERECT_FAST_RENDERER
 546 #ifdef SIMPLERECT_FAST_RENDERER
 547
 548 static void
 549 gnome_canvas_simplerect_render (GnomeCanvasItem *item,
 550                               GnomeCanvasBuf *buf)
 551 {
 552         GnomeCanvasSimpleRect *simplerect;
 553         int end, begin;
 554         int ey, sy;
 555         unsigned int i;
 556         ArtIRect intersection;
 557         ArtIRect self;
 558
 559         simplerect = GNOME_CANVAS_SIMPLERECT (item);
 560
 561         if (parent_class->render) {
 562                 (*parent_class->render) (item, buf);
 563         }
 564
 565         if (buf->is_bg) {
 566
 567 #ifdef HARLEQUIN_DEBUGGING
 568                 gint randr, randg, randb;
 569                 randr = random() % 255;
 570                 randg = random() % 255;
 571                 randb = random() % 255;
 572                 PAINT_BOX(buf, randr, randg, randb, 255, buf->rect.x0, buf->rect.y0, buf->rect.x1, buf->rect.y1);
 573 #endif
 574                 gnome_canvas_buf_ensure_buf (buf);
 575                 buf->is_bg = FALSE;
 576         }
 577
 578         if (!simplerect->draw) {
 579                 return;
 580         }
 581
 582         self.x0 = simplerect->bbox_ulx;
 583         self.y0 = simplerect->bbox_uly;
 584         self.x1 = simplerect->bbox_lrx;
 585         self.y1 = simplerect->bbox_lry;
 586
 587         art_irect_intersect (&intersection, &self, &buf->rect);
 588
 589         begin = MAX(simplerect->bbox_ulx, buf->rect.x0);
 590         end = MIN((simplerect->bbox_lrx-1), buf->rect.x1);
 591
 592         sy = simplerect->bbox_uly;
 593         ey = simplerect->bbox_lry-1;
 594
 595         if (simplerect->fill) {
 596
 597                 // this can be useful for debugging/understanding how the canvas redraws
 598                 // stuff.
 599
 600 #ifdef HARLEQUIN_DEBUGGING
 601                 gint randr, randg, randb;
 602                 randr = random() % 255;
 603                 randg = random() % 255;
 604                 randb = random() % 255;
 605                 PAINT_BOX(buf, randr, randg, randb, simplerect->fill_a, begin, sy, end, ey);
 606 #else
 607                 PAINT_BOX (buf, simplerect->fill_r, simplerect->fill_g, simplerect->fill_b, simplerect->fill_a,
 608                            intersection.x0, intersection.y0,
 609                            intersection.x1, intersection.y1);
 610 #endif
 611
 612         }
 613
 614         for (i = 0; i < simplerect->outline_pixels; ++i) {
 615
 616                 if (simplerect->outline_what & 0x1) {
 617                         if (begin == simplerect->bbox_ulx) {
 618                                 PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin + i, sy, ey);
 619                         }
 620                 }
 621
 622                 if (simplerect->outline_what & 0x2) {
 623                         if (end == (simplerect->bbox_lrx - 1)) {
 624                                 PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, end - i, sy, ey + 1);
 625                         }
 626                 }
 627
 628                 if (simplerect->outline_what & 0x4) {
 629                         PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end, sy+i);
 630                 }
 631
 632                 if (simplerect->outline_what & 0x8) {
 633                         PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end + 1, ey-i);
 634                 }
 635         }
 636 }
 637
 638 #else /* SIMPLERECT_FAST_RENDERER */
 639
 640 static void
 641 gnome_canvas_simplerect_render (GnomeCanvasItem *item,
 642                               GnomeCanvasBuf *buf)
 643 {
 644         GnomeCanvasSimpleRect *simplerect;
 645         int end, begin;
 646         int ey, sy;
 647         unsigned int i;
 648
 649         simplerect = GNOME_CANVAS_SIMPLERECT (item);
 650
 651         if (parent_class->render) {
 652                 (*parent_class->render) (item, buf);
 653         }
 654
 655         if (buf->is_bg) {
 656
 657 #ifdef HARLEQUIN_DEBUGGING
 658                 gint randr, randg, randb;
 659                 randr = random() % 255;
 660                 randg = random() % 255;
 661                 randb = random() % 255;
 662                 PAINT_BOX(buf, randr, randg, randb, 255, buf->rect.x0, buf->rect.y0, buf->rect.x1, buf->rect.y1);
 663 #endif
 664                 gnome_canvas_buf_ensure_buf (buf);
 665                 buf->is_bg = FALSE;
 666         }
 667
 668         if (!simplerect->draw) {
 669                 return;
 670         }
 671
 672         begin = MAX(simplerect->bbox_ulx,buf->rect.x0);
 673         end = MIN((simplerect->bbox_lrx-1),buf->rect.x1);
 674
 675         sy = simplerect->bbox_uly;
 676         ey = simplerect->bbox_lry-1;
 677
 678         if (simplerect->fill) {
 679
 680 #ifdef HARLEQUIN_DEBUGGING
 681                 gint randr, randg, randb;
 682                 randr = random() % 255;
 683                 randg = random() % 255;
 684                 randb = random() % 255;
 685                 PAINT_BOX(buf, randr, randg, randb, simplerect->fill_a, begin, sy, end, ey);
 686 #else
 687                 PAINT_BOX(buf, simplerect->fill_r, simplerect->fill_g, simplerect->fill_b, simplerect->fill_a, begin, sy, end, ey);
 688 #endif
 689         }
 690
 691         for (i = 0; i < simplerect->outline_pixels; ++i) {
 692
 693                 if (simplerect->outline_what & 0x1) {
 694                         if (begin == simplerect->bbox_ulx) {
 695                                 PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin + i, sy, ey);
 696                         }
 697                 }
 698
 699                 if (simplerect->outline_what & 0x2) {
 700                         if (end == (simplerect->bbox_lrx - 1)) {
 701                                 PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, end - i, sy, ey + 1);
 702                         }
 703                 }
 704
 705                 if (simplerect->outline_what & 0x4) {
 706                         PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end, sy+i);
 707                 }
 708
 709                 if (simplerect->outline_what & 0x8) {
 710                         PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end + 1, ey-i);
 711                 }
 712         }
 713 }
 714 #endif /* SIMPLERECT_FAST_RENDERER */
 715
 716 static void
 717 gnome_canvas_simplerect_draw (GnomeCanvasItem *item,
 718                               GdkDrawable *drawable,
 719                               int x, int y,
 720                               int width, int height)
 721 {
 722         GnomeCanvasSimpleRect *simplerect;
 723         cairo_t* cr;
 724         double ulx;
 725         double uly;
 726         double lrx;
 727         double lry;
 728
 729         simplerect = GNOME_CANVAS_SIMPLERECT (item);
 730
 731         cr = gdk_cairo_create (drawable);
 732
 733         if (x > simplerect->bbox_ulx) {
 734                 ulx = x;
 735         } else {
 736                 ulx = simplerect->bbox_ulx;
 737         }
 738
 739         if (y > simplerect->bbox_uly) {
 740                 uly = y;
 741         } else {
 742                 uly = simplerect->bbox_uly;
 743         }
 744
 745         if (x + width > simplerect->bbox_lrx) {
 746                 lrx = simplerect->bbox_lrx;
 747         } else {
 748                 lrx = x + width;
 749         }
 750
 751         if (y + height > simplerect->bbox_lry) {
 752                 lry = simplerect->bbox_lry;
 753         } else {
 754                 lry = y + height;
 755         }
 756
 757         ulx -= x;
 758         uly -= y;
 759         lrx -= x;
 760         lry -= y;
 761
 762         cairo_rectangle (cr, ulx, uly, lrx - ulx, lry - uly);
 763
 764         if (simplerect->fill) {
 765                 cairo_set_source_rgba (cr,
 766                                        simplerect->fill_r/255.0,
 767                                        simplerect->fill_g/255.0,
 768                                        simplerect->fill_b/255.0,
 769                                        simplerect->fill_a/255.0);
 770                 cairo_fill (cr);
 771         }
 772
 773         if (simplerect->outline_what && simplerect->outline_pixels) {
 774
 775 #define x_in_range(a) (x <= (a) && (a) < x + width)
 776 #define y_in_range(a) (y <= (a) && (a) < y + height)
 777
 778                 cairo_set_line_width (cr, simplerect->outline_pixels);
 779
 780                 cairo_set_source_rgb (cr,
 781                                       simplerect->outline_r/255.0,
 782                                       simplerect->outline_g/255.0,
 783                                       simplerect->outline_b/255.0);
 784
 785                 if (simplerect->outline_what & 0x1) {
 786                         /* left edge, if visible */
 787                         if (x_in_range (simplerect->bbox_ulx)) {
 788                                 cairo_move_to (cr, ulx+0.5, uly+0.5);
 789                                 cairo_line_to (cr, ulx+0.5, lry+0.5);
 790                                 cairo_stroke (cr);
 791                         }
 792                 }
 793
 794                 if (simplerect->outline_what & 0x2) {
 795                         /* right edge, if visible */
 796                         if (x_in_range (simplerect->bbox_lrx)) {
 797                                 cairo_move_to (cr, lrx+0.5, uly+0.5);
 798                                 cairo_line_to (cr, lrx+0.5, lry+0.5);
 799                                 cairo_stroke (cr);
 800                         }
 801                 }
 802
 803                 if (simplerect->outline_what & 0x4) {
 804                         /* top edge */
 805                         if (y_in_range (simplerect->bbox_uly)) {
 806                                 cairo_move_to (cr, ulx+0.5, uly+0.5);
 807                                 cairo_line_to (cr, lrx+0.5, uly+0.5);
 808                                 cairo_stroke (cr);
 809                         }
 810                 }
 811
 812                 if (simplerect->outline_what & 0x8) {
 813                         /* bottom edge */
 814                         if (y_in_range (simplerect->bbox_lry)) {
 815                                 cairo_move_to (cr, ulx+0.5, lry+0.5);
 816                                 cairo_line_to (cr, lrx+0.5, lry+0.5);
 817                                 cairo_stroke (cr);
 818                         }
 819                 }
 820         }
 821
 822         cairo_destroy (cr);
 823 }
 824
 825 static double
 826 gnome_canvas_simplerect_point (GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item)
 827 {
 828         GnomeCanvasSimpleRect *simplerect;
 829         double x1, y1, x2, y2;
 830         double dx, dy;
 831
 832         simplerect = GNOME_CANVAS_SIMPLERECT (item);
 833
 834         *actual_item = item;
 835
 836         /* Find the bounds for the rectangle plus its outline width */
 837
 838         gnome_canvas_simplerect_bounds (item, &x1, &y1, &x2, &y2);
 839
 840         /* Is point inside rectangle */
 841
 842         if ((x >= x1) && (y >= y1) && (x <= x2) && (y <= y2)) {
 843                 return 0.0;
 844         }
 845
 846         /* Point is outside rectangle */
 847
 848         if (x < x1)
 849                 dx = x1 - x;
 850         else if (x > x2)
 851                 dx = x - x2;
 852         else
 853                 dx = 0.0;
 854
 855         if (y < y1)
 856                 dy = y1 - y;
 857         else if (y > y2)
 858                 dy = y - y2;
 859         else
 860                 dy = 0.0;
 861
 862         return sqrt (dx * dx + dy * dy);
 863 }