Pileus Git - ~andy/gtk/blob - gtk/gtkcellrendererprogress.c

   1 /* gtkcellrendererprogress.c
   2  * Copyright (C) 2002 Naba Kumar <kh_naba@users.sourceforge.net>
   3  * heavily modified by Jörgen Scheibengruber <mfcn@gmx.de>
   4  * heavily modified by Marco Pesenti Gritti <marco@gnome.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 /*
  20  * Modified by the GTK+ Team and others 1997-2007.  See the AUTHORS
  21  * file for a list of people on the GTK+ Team.  See the ChangeLog
  22  * files for a list of changes.  These files are distributed with
  23  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  24  */
  25
  26 #include "config.h"
  27 #include <stdlib.h>
  28
  29 #include "gtkcellrendererprogress.h"
  30 #include "gtkorientable.h"
  31 #include "gtkprivate.h"
  32 #include "gtkintl.h"
  33
  34
  35 /**
  36  * SECTION:gtkcellrendererprogress
  37  * @Short_description: Renders numbers as progress bars
  38  * @Title: GtkCellRendererProgress
  39  *
  40  * #GtkCellRendererProgress renders a numeric value as a progress par in a cell.
  41  * Additionally, it can display a text on top of the progress bar.
  42  *
  43  * The #GtkCellRendererProgress cell renderer was added in GTK+ 2.6.
  44  */
  45
  46
  47 enum
  48 {
  49   PROP_0,
  50   PROP_VALUE,
  51   PROP_TEXT,
  52   PROP_PULSE,
  53   PROP_TEXT_XALIGN,
  54   PROP_TEXT_YALIGN,
  55   PROP_ORIENTATION,
  56   PROP_INVERTED
  57 };
  58
  59 struct _GtkCellRendererProgressPrivate
  60 {
  61   gint value;
  62   gchar *text;
  63   gchar *label;
  64   gint min_h;
  65   gint min_w;
  66   gint pulse;
  67   gint offset;
  68   gfloat text_xalign;
  69   gfloat text_yalign;
  70   GtkOrientation orientation;
  71   gboolean inverted;
  72 };
  73
  74 static void gtk_cell_renderer_progress_finalize     (GObject                 *object);
  75 static void gtk_cell_renderer_progress_get_property (GObject                 *object,
  76                                                      guint                    param_id,
  77                                                      GValue                  *value,
  78                                                      GParamSpec              *pspec);
  79 static void gtk_cell_renderer_progress_set_property (GObject                 *object,
  80                                                      guint                    param_id,
  81                                                      const GValue            *value,
  82                                                      GParamSpec              *pspec);
  83 static void gtk_cell_renderer_progress_set_value    (GtkCellRendererProgress *cellprogress,
  84                                                      gint                     value);
  85 static void gtk_cell_renderer_progress_set_text     (GtkCellRendererProgress *cellprogress,
  86                                                      const gchar             *text);
  87 static void gtk_cell_renderer_progress_set_pulse    (GtkCellRendererProgress *cellprogress,
  88                                                      gint                     pulse);
  89 static void compute_dimensions                      (GtkCellRenderer         *cell,
  90                                                      GtkWidget               *widget,
  91                                                      const gchar             *text,
  92                                                      gint                    *width,
  93                                                      gint                    *height);
  94 static void gtk_cell_renderer_progress_get_size     (GtkCellRenderer         *cell,
  95                                                      GtkWidget               *widget,
  96                                                      const GdkRectangle      *cell_area,
  97                                                      gint                    *x_offset,
  98                                                      gint                    *y_offset,
  99                                                      gint                    *width,
 100                                                      gint                    *height);
 101 static void gtk_cell_renderer_progress_render       (GtkCellRenderer         *cell,
 102                                                      cairo_t                 *cr,
 103                                                      GtkWidget               *widget,
 104                                                      const GdkRectangle      *background_area,
 105                                                      const GdkRectangle      *cell_area,
 106                                                      GtkCellRendererState    flags);
 107
 108
 109 G_DEFINE_TYPE_WITH_CODE (GtkCellRendererProgress, gtk_cell_renderer_progress, GTK_TYPE_CELL_RENDERER,
 110                          G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL))
 111
 112 static void
 113 gtk_cell_renderer_progress_class_init (GtkCellRendererProgressClass *klass)
 114 {
 115   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 116   GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass);
 117
 118   object_class->finalize = gtk_cell_renderer_progress_finalize;
 119   object_class->get_property = gtk_cell_renderer_progress_get_property;
 120   object_class->set_property = gtk_cell_renderer_progress_set_property;
 121
 122   cell_class->get_size = gtk_cell_renderer_progress_get_size;
 123   cell_class->render = gtk_cell_renderer_progress_render;
 124
 125   /**
 126    * GtkCellRendererProgress:value:
 127    *
 128    * The "value" property determines the percentage to which the
 129    * progress bar will be "filled in".
 130    *
 131    * Since: 2.6
 132    **/
 133   g_object_class_install_property (object_class,
 134                                    PROP_VALUE,
 135                                    g_param_spec_int ("value",
 136                                                      P_("Value"),
 137                                                      P_("Value of the progress bar"),
 138                                                      0, 100, 0,
 139                                                      GTK_PARAM_READWRITE));
 140
 141   /**
 142    * GtkCellRendererProgress:text:
 143    *
 144    * The "text" property determines the label which will be drawn
 145    * over the progress bar. Setting this property to %NULL causes the default
 146    * label to be displayed. Setting this property to an empty string causes
 147    * no label to be displayed.
 148    *
 149    * Since: 2.6
 150    **/
 151   g_object_class_install_property (object_class,
 152                                    PROP_TEXT,
 153                                    g_param_spec_string ("text",
 154                                                         P_("Text"),
 155                                                         P_("Text on the progress bar"),
 156                                                         NULL,
 157                                                         GTK_PARAM_READWRITE));
 158
 159   /**
 160    * GtkCellRendererProgress:pulse:
 161    *
 162    * Setting this to a non-negative value causes the cell renderer to
 163    * enter "activity mode", where a block bounces back and forth to
 164    * indicate that some progress is made, without specifying exactly how
 165    * much.
 166    *
 167    * Each increment of the property causes the block to move by a little
 168    * bit.
 169    *
 170    * To indicate that the activity has not started yet, set the property
 171    * to zero. To indicate completion, set the property to %G_MAXINT.
 172    *
 173    * Since: 2.12
 174    */
 175   g_object_class_install_property (object_class,
 176                                    PROP_PULSE,
 177                                    g_param_spec_int ("pulse",
 178                                                      P_("Pulse"),
 179                                                      P_("Set this to positive values to indicate that some progress is made, but you don't know how much."),
 180                                                      -1, G_MAXINT, -1,
 181                                                      GTK_PARAM_READWRITE));
 182
 183   /**
 184    * GtkCellRendererProgress:text-xalign:
 185    *
 186    * The "text-xalign" property controls the horizontal alignment of the
 187    * text in the progress bar.  Valid values range from 0 (left) to 1
 188    * (right).  Reserved for RTL layouts.
 189    *
 190    * Since: 2.12
 191    */
 192   g_object_class_install_property (object_class,
 193                                    PROP_TEXT_XALIGN,
 194                                    g_param_spec_float ("text-xalign",
 195                                                        P_("Text x alignment"),
 196                                                        P_("The horizontal text alignment, from 0 (left) to 1 (right). Reversed for RTL layouts."),
 197                                                        0.0, 1.0, 0.5,
 198                                                        GTK_PARAM_READWRITE));
 199
 200   /**
 201    * GtkCellRendererProgress:text-yalign:
 202    *
 203    * The "text-yalign" property controls the vertical alignment of the
 204    * text in the progress bar.  Valid values range from 0 (top) to 1
 205    * (bottom).
 206    *
 207    * Since: 2.12
 208    */
 209   g_object_class_install_property (object_class,
 210                                    PROP_TEXT_YALIGN,
 211                                    g_param_spec_float ("text-yalign",
 212                                                        P_("Text y alignment"),
 213                                                        P_("The vertical text alignment, from 0 (top) to 1 (bottom)."),
 214                                                        0.0, 1.0, 0.5,
 215                                                        GTK_PARAM_READWRITE));
 216
 217   g_object_class_override_property (object_class,
 218                                     PROP_ORIENTATION,
 219                                     "orientation");
 220
 221   g_object_class_install_property (object_class,
 222                                    PROP_INVERTED,
 223                                    g_param_spec_boolean ("inverted",
 224                                                          P_("Inverted"),
 225                                                          P_("Invert the direction in which the progress bar grows"),
 226                                                          FALSE,
 227                                                          GTK_PARAM_READWRITE));
 228
 229   g_type_class_add_private (object_class,
 230                             sizeof (GtkCellRendererProgressPrivate));
 231 }
 232
 233 static void
 234 gtk_cell_renderer_progress_init (GtkCellRendererProgress *cellprogress)
 235 {
 236   GtkCellRendererProgressPrivate *priv;
 237
 238   cellprogress->priv = G_TYPE_INSTANCE_GET_PRIVATE (cellprogress,
 239                                                     GTK_TYPE_CELL_RENDERER_PROGRESS,
 240                                                     GtkCellRendererProgressPrivate);
 241   priv = cellprogress->priv;
 242
 243   priv->value = 0;
 244   priv->text = NULL;
 245   priv->label = NULL;
 246   priv->min_w = -1;
 247   priv->min_h = -1;
 248   priv->pulse = -1;
 249   priv->offset = 0;
 250
 251   priv->text_xalign = 0.5;
 252   priv->text_yalign = 0.5;
 253
 254   priv->orientation = GTK_ORIENTATION_HORIZONTAL,
 255   priv->inverted = FALSE;
 256 }
 257
 258
 259 /**
 260  * gtk_cell_renderer_progress_new:
 261  *
 262  * Creates a new #GtkCellRendererProgress.
 263  *
 264  * Return value: the new cell renderer
 265  *
 266  * Since: 2.6
 267  **/
 268 GtkCellRenderer*
 269 gtk_cell_renderer_progress_new (void)
 270 {
 271   return g_object_new (GTK_TYPE_CELL_RENDERER_PROGRESS, NULL);
 272 }
 273
 274 static void
 275 gtk_cell_renderer_progress_finalize (GObject *object)
 276 {
 277   GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (object);
 278   GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 279
 280   g_free (priv->text);
 281   g_free (priv->label);
 282
 283   G_OBJECT_CLASS (gtk_cell_renderer_progress_parent_class)->finalize (object);
 284 }
 285
 286 static void
 287 gtk_cell_renderer_progress_get_property (GObject *object,
 288                                          guint param_id,
 289                                          GValue *value,
 290                                          GParamSpec *pspec)
 291 {
 292   GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (object);
 293   GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 294
 295   switch (param_id)
 296     {
 297     case PROP_VALUE:
 298       g_value_set_int (value, priv->value);
 299       break;
 300     case PROP_TEXT:
 301       g_value_set_string (value, priv->text);
 302       break;
 303     case PROP_PULSE:
 304       g_value_set_int (value, priv->pulse);
 305       break;
 306     case PROP_TEXT_XALIGN:
 307       g_value_set_float (value, priv->text_xalign);
 308       break;
 309     case PROP_TEXT_YALIGN:
 310       g_value_set_float (value, priv->text_yalign);
 311       break;
 312     case PROP_ORIENTATION:
 313       g_value_set_enum (value, priv->orientation);
 314       break;
 315     case PROP_INVERTED:
 316       g_value_set_boolean (value, priv->inverted);
 317       break;
 318     default:
 319       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 320     }
 321 }
 322
 323 static void
 324 gtk_cell_renderer_progress_set_property (GObject *object,
 325                                          guint param_id,
 326                                          const GValue *value,
 327                                          GParamSpec   *pspec)
 328 {
 329   GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (object);
 330   GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 331
 332   switch (param_id)
 333     {
 334     case PROP_VALUE:
 335       gtk_cell_renderer_progress_set_value (cellprogress,
 336                                             g_value_get_int (value));
 337       break;
 338     case PROP_TEXT:
 339       gtk_cell_renderer_progress_set_text (cellprogress,
 340                                            g_value_get_string (value));
 341       break;
 342     case PROP_PULSE:
 343       gtk_cell_renderer_progress_set_pulse (cellprogress,
 344                                             g_value_get_int (value));
 345       break;
 346     case PROP_TEXT_XALIGN:
 347       priv->text_xalign = g_value_get_float (value);
 348       break;
 349     case PROP_TEXT_YALIGN:
 350       priv->text_yalign = g_value_get_float (value);
 351       break;
 352     case PROP_ORIENTATION:
 353       priv->orientation = g_value_get_enum (value);
 354       break;
 355     case PROP_INVERTED:
 356       priv->inverted = g_value_get_boolean (value);
 357       break;
 358     default:
 359       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 360     }
 361 }
 362
 363 static void
 364 recompute_label (GtkCellRendererProgress *cellprogress)
 365 {
 366   GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 367   gchar *label;
 368
 369   if (priv->text)
 370     label = g_strdup (priv->text);
 371   else if (priv->pulse < 0)
 372     label = g_strdup_printf (C_("progress bar label", "%d %%"), priv->value);
 373   else
 374     label = NULL;
 375
 376   g_free (priv->label);
 377   priv->label = label;
 378 }
 379
 380 static void
 381 gtk_cell_renderer_progress_set_value (GtkCellRendererProgress *cellprogress,
 382                                       gint                     value)
 383 {
 384   cellprogress->priv->value = value;
 385
 386   recompute_label (cellprogress);
 387 }
 388
 389 static void
 390 gtk_cell_renderer_progress_set_text (GtkCellRendererProgress *cellprogress,
 391                                      const gchar             *text)
 392 {
 393   gchar *new_text;
 394
 395   new_text = g_strdup (text);
 396   g_free (cellprogress->priv->text);
 397   cellprogress->priv->text = new_text;
 398
 399   recompute_label (cellprogress);
 400 }
 401
 402 static void
 403 gtk_cell_renderer_progress_set_pulse (GtkCellRendererProgress *cellprogress,
 404                                       gint                     pulse)
 405 {
 406    GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 407
 408    if (pulse != priv->pulse)
 409      {
 410        if (pulse <= 0)
 411          priv->offset = 0;
 412        else
 413          priv->offset = pulse;
 414      }
 415
 416    priv->pulse = pulse;
 417
 418    recompute_label (cellprogress);
 419 }
 420
 421 static void
 422 compute_dimensions (GtkCellRenderer *cell,
 423                     GtkWidget       *widget,
 424                     const gchar     *text,
 425                     gint            *width,
 426                     gint            *height)
 427 {
 428   PangoRectangle logical_rect;
 429   PangoLayout *layout;
 430   gint xpad, ypad;
 431
 432   layout = gtk_widget_create_pango_layout (widget, text);
 433   pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
 434
 435   gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
 436
 437   if (width)
 438     *width = logical_rect.width + xpad * 2;
 439
 440   if (height)
 441     *height = logical_rect.height + ypad * 2;
 442
 443   g_object_unref (layout);
 444 }
 445
 446 static void
 447 gtk_cell_renderer_progress_get_size (GtkCellRenderer    *cell,
 448                                      GtkWidget          *widget,
 449                                      const GdkRectangle *cell_area,
 450                                      gint               *x_offset,
 451                                      gint               *y_offset,
 452                                      gint               *width,
 453                                      gint               *height)
 454 {
 455   GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (cell);
 456   GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 457   gint w, h;
 458   gchar *text;
 459
 460   if (priv->min_w < 0)
 461     {
 462       text = g_strdup_printf (C_("progress bar label", "%d %%"), 100);
 463       compute_dimensions (cell, widget, text,
 464                           &priv->min_w,
 465                           &priv->min_h);
 466       g_free (text);
 467     }
 468
 469   compute_dimensions (cell, widget, priv->label, &w, &h);
 470
 471   if (width)
 472     *width = MAX (priv->min_w, w);
 473
 474   if (height)
 475     *height = MIN (priv->min_h, h);
 476
 477   /* FIXME: at the moment cell_area is only set when we are requesting
 478    * the size for drawing the focus rectangle. We now just return
 479    * the last size we used for drawing the progress bar, which will
 480    * work for now. Not a really nice solution though.
 481    */
 482   if (cell_area)
 483     {
 484       if (width)
 485         *width = cell_area->width;
 486       if (height)
 487         *height = cell_area->height;
 488     }
 489
 490   if (x_offset) *x_offset = 0;
 491   if (y_offset) *y_offset = 0;
 492 }
 493
 494 static inline gint
 495 get_bar_size (gint pulse,
 496               gint value,
 497               gint full_size)
 498 {
 499   gint bar_size;
 500
 501   if (pulse < 0)
 502     bar_size = full_size * MAX (0, value) / 100;
 503   else if (pulse == 0)
 504     bar_size = 0;
 505   else if (pulse == G_MAXINT)
 506     bar_size = full_size;
 507   else
 508     bar_size = MAX (2, full_size / 5);
 509
 510   return bar_size;
 511 }
 512
 513 static inline gint
 514 get_bar_position (gint     start,
 515                   gint     full_size,
 516                   gint     bar_size,
 517                   gint     pulse,
 518                   gint     offset,
 519                   gboolean is_rtl)
 520 {
 521   gint position;
 522
 523   if (pulse < 0 || pulse == 0 || pulse == G_MAXINT)
 524     {
 525       position = is_rtl ? (start + full_size - bar_size) : start;
 526     }
 527   else
 528     {
 529       position = (is_rtl ? offset + 12 : offset) % 24;
 530       if (position > 12)
 531         position = 24 - position;
 532       position = start + full_size * position / 15;
 533     }
 534
 535   return position;
 536 }
 537
 538 static void
 539 gtk_cell_renderer_progress_render (GtkCellRenderer      *cell,
 540                                    cairo_t              *cr,
 541                                    GtkWidget            *widget,
 542                                    const GdkRectangle   *background_area,
 543                                    const GdkRectangle   *cell_area,
 544                                    GtkCellRendererState  flags)
 545 {
 546   GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (cell);
 547   GtkCellRendererProgressPrivate *priv= cellprogress->priv;
 548   GtkStyleContext *context;
 549   GtkBorder padding;
 550   PangoLayout *layout;
 551   PangoRectangle logical_rect;
 552   gint x, y, w, h, x_pos, y_pos, bar_position, bar_size, start, full_size;
 553   gint xpad, ypad;
 554   GdkRectangle clip;
 555   gboolean is_rtl;
 556
 557   context = gtk_widget_get_style_context (widget);
 558   is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
 559
 560   gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
 561   x = cell_area->x + xpad;
 562   y = cell_area->y + ypad;
 563   w = cell_area->width - xpad * 2;
 564   h = cell_area->height - ypad * 2;
 565
 566   gtk_style_context_save (context);
 567   gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
 568
 569   gtk_render_background (context, cr, x, y, w, h);
 570   gtk_render_frame (context, cr, x, y, w, h);
 571
 572   gtk_style_context_get_padding (context, GTK_STATE_FLAG_NORMAL, &padding);
 573
 574   x += padding.left;
 575   y += padding.top;
 576   w -= padding.left + padding.right;
 577   h -= padding.top + padding.bottom;
 578
 579   gtk_style_context_restore (context);
 580
 581   if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 582     {
 583       clip.y = y;
 584       clip.height = h;
 585
 586       start = x;
 587       full_size = w;
 588
 589       bar_size = get_bar_size (priv->pulse, priv->value, full_size);
 590
 591       if (!priv->inverted)
 592         bar_position = get_bar_position (start, full_size, bar_size,
 593                                          priv->pulse, priv->offset, is_rtl);
 594       else
 595         bar_position = get_bar_position (start, full_size, bar_size,
 596                                          priv->pulse, priv->offset, !is_rtl);
 597
 598       clip.width = bar_size;
 599       clip.x = bar_position;
 600     }
 601   else
 602     {
 603       clip.x = x;
 604       clip.width = w;
 605
 606       start = y;
 607       full_size = h;
 608
 609       bar_size = get_bar_size (priv->pulse, priv->value, full_size);
 610
 611       if (priv->inverted)
 612         bar_position = get_bar_position (start, full_size, bar_size,
 613                                          priv->pulse, priv->offset, TRUE);
 614       else
 615         bar_position = get_bar_position (start, full_size, bar_size,
 616                                          priv->pulse, priv->offset, FALSE);
 617
 618       clip.height = bar_size;
 619       clip.y = bar_position;
 620     }
 621
 622   gtk_style_context_save (context);
 623   gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
 624
 625   if (bar_size > 0)
 626     gtk_render_activity (context, cr,
 627                          clip.x, clip.y,
 628                          clip.width, clip.height);
 629
 630   gtk_style_context_restore (context);
 631
 632   if (priv->label)
 633     {
 634       gfloat text_xalign;
 635
 636       layout = gtk_widget_create_pango_layout (widget, priv->label);
 637       pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
 638
 639       if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
 640         text_xalign = 1.0 - priv->text_xalign;
 641       else
 642         text_xalign = priv->text_xalign;
 643
 644       x_pos = x + padding.left + text_xalign *
 645         (w - padding.left - padding.right - logical_rect.width);
 646
 647       y_pos = y + padding.top + priv->text_yalign *
 648         (h - padding.top - padding.bottom - logical_rect.height);
 649
 650       cairo_save (cr);
 651       gdk_cairo_rectangle (cr, &clip);
 652       cairo_clip (cr);
 653
 654       gtk_style_context_save (context);
 655       gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
 656
 657       gtk_render_layout (context, cr,
 658                          x_pos, y_pos,
 659                          layout);
 660
 661       gtk_style_context_restore (context);
 662       cairo_restore (cr);
 663
 664       gtk_style_context_save (context);
 665       gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
 666
 667       if (bar_position > start)
 668         {
 669           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 670             {
 671               clip.x = x;
 672               clip.width = bar_position - x;
 673             }
 674           else
 675             {
 676               clip.y = y;
 677               clip.height = bar_position - y;
 678             }
 679
 680           cairo_save (cr);
 681           gdk_cairo_rectangle (cr, &clip);
 682           cairo_clip (cr);
 683
 684           gtk_render_layout (context, cr,
 685                              x_pos, y_pos,
 686                              layout);
 687
 688           cairo_restore (cr);
 689         }
 690
 691       if (bar_position + bar_size < start + full_size)
 692         {
 693           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 694             {
 695               clip.x = bar_position + bar_size;
 696               clip.width = x + w - (bar_position + bar_size);
 697             }
 698           else
 699             {
 700               clip.y = bar_position + bar_size;
 701               clip.height = y + h - (bar_position + bar_size);
 702             }
 703
 704           cairo_save (cr);
 705           gdk_cairo_rectangle (cr, &clip);
 706           cairo_clip (cr);
 707
 708           gtk_render_layout (context, cr,
 709                              x_pos, y_pos,
 710                              layout);
 711
 712           cairo_restore (cr);
 713         }
 714
 715       gtk_style_context_restore (context);
 716       g_object_unref (layout);
 717     }
 718 }