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, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21 /*
  22  * Modified by the GTK+ Team and others 1997-2007.  See the AUTHORS
  23  * file for a list of people on the GTK+ Team.  See the ChangeLog
  24  * files for a list of changes.  These files are distributed with
  25  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  26  */
  27
  28 #include "config.h"
  29 #include <stdlib.h>
  30
  31 #include "gtkcellrendererprogress.h"
  32 #include "gtkorientable.h"
  33 #include "gtkprivate.h"
  34 #include "gtkintl.h"
  35
  36
  37 /**
  38  * SECTION:gtkcellrendererprogress
  39  * @Short_description: Renders numbers as progress bars
  40  * @Title: GtkCellRendererProgress
  41  *
  42  * #GtkCellRendererProgress renders a numeric value as a progress par in a cell.
  43  * Additionally, it can display a text on top of the progress bar.
  44  *
  45  * The #GtkCellRendererProgress cell renderer was added in GTK+ 2.6.
  46  */
  47
  48
  49 enum
  50 {
  51   PROP_0,
  52   PROP_VALUE,
  53   PROP_TEXT,
  54   PROP_PULSE,
  55   PROP_TEXT_XALIGN,
  56   PROP_TEXT_YALIGN,
  57   PROP_ORIENTATION,
  58   PROP_INVERTED
  59 };
  60
  61 struct _GtkCellRendererProgressPrivate
  62 {
  63   gint value;
  64   gchar *text;
  65   gchar *label;
  66   gint min_h;
  67   gint min_w;
  68   gint pulse;
  69   gint offset;
  70   gfloat text_xalign;
  71   gfloat text_yalign;
  72   GtkOrientation orientation;
  73   gboolean inverted;
  74 };
  75
  76 static void gtk_cell_renderer_progress_finalize     (GObject                 *object);
  77 static void gtk_cell_renderer_progress_get_property (GObject                 *object,
  78                                                      guint                    param_id,
  79                                                      GValue                  *value,
  80                                                      GParamSpec              *pspec);
  81 static void gtk_cell_renderer_progress_set_property (GObject                 *object,
  82                                                      guint                    param_id,
  83                                                      const GValue            *value,
  84                                                      GParamSpec              *pspec);
  85 static void gtk_cell_renderer_progress_set_value    (GtkCellRendererProgress *cellprogress,
  86                                                      gint                     value);
  87 static void gtk_cell_renderer_progress_set_text     (GtkCellRendererProgress *cellprogress,
  88                                                      const gchar             *text);
  89 static void gtk_cell_renderer_progress_set_pulse    (GtkCellRendererProgress *cellprogress,
  90                                                      gint                     pulse);
  91 static void compute_dimensions                      (GtkCellRenderer         *cell,
  92                                                      GtkWidget               *widget,
  93                                                      const gchar             *text,
  94                                                      gint                    *width,
  95                                                      gint                    *height);
  96 static void gtk_cell_renderer_progress_get_size     (GtkCellRenderer         *cell,
  97                                                      GtkWidget               *widget,
  98                                                      const GdkRectangle      *cell_area,
  99                                                      gint                    *x_offset,
 100                                                      gint                    *y_offset,
 101                                                      gint                    *width,
 102                                                      gint                    *height);
 103 static void gtk_cell_renderer_progress_render       (GtkCellRenderer         *cell,
 104                                                      cairo_t                 *cr,
 105                                                      GtkWidget               *widget,
 106                                                      const GdkRectangle      *background_area,
 107                                                      const GdkRectangle      *cell_area,
 108                                                      GtkCellRendererState    flags);
 109
 110
 111 G_DEFINE_TYPE_WITH_CODE (GtkCellRendererProgress, gtk_cell_renderer_progress, GTK_TYPE_CELL_RENDERER,
 112                          G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL))
 113
 114 static void
 115 gtk_cell_renderer_progress_class_init (GtkCellRendererProgressClass *klass)
 116 {
 117   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 118   GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass);
 119
 120   object_class->finalize = gtk_cell_renderer_progress_finalize;
 121   object_class->get_property = gtk_cell_renderer_progress_get_property;
 122   object_class->set_property = gtk_cell_renderer_progress_set_property;
 123
 124   cell_class->get_size = gtk_cell_renderer_progress_get_size;
 125   cell_class->render = gtk_cell_renderer_progress_render;
 126
 127   /**
 128    * GtkCellRendererProgress:value:
 129    *
 130    * The "value" property determines the percentage to which the
 131    * progress bar will be "filled in".
 132    *
 133    * Since: 2.6
 134    **/
 135   g_object_class_install_property (object_class,
 136                                    PROP_VALUE,
 137                                    g_param_spec_int ("value",
 138                                                      P_("Value"),
 139                                                      P_("Value of the progress bar"),
 140                                                      0, 100, 0,
 141                                                      GTK_PARAM_READWRITE));
 142
 143   /**
 144    * GtkCellRendererProgress:text:
 145    *
 146    * The "text" property determines the label which will be drawn
 147    * over the progress bar. Setting this property to %NULL causes the default
 148    * label to be displayed. Setting this property to an empty string causes
 149    * no label to be displayed.
 150    *
 151    * Since: 2.6
 152    **/
 153   g_object_class_install_property (object_class,
 154                                    PROP_TEXT,
 155                                    g_param_spec_string ("text",
 156                                                         P_("Text"),
 157                                                         P_("Text on the progress bar"),
 158                                                         NULL,
 159                                                         GTK_PARAM_READWRITE));
 160
 161   /**
 162    * GtkCellRendererProgress:pulse:
 163    *
 164    * Setting this to a non-negative value causes the cell renderer to
 165    * enter "activity mode", where a block bounces back and forth to
 166    * indicate that some progress is made, without specifying exactly how
 167    * much.
 168    *
 169    * Each increment of the property causes the block to move by a little
 170    * bit.
 171    *
 172    * To indicate that the activity has not started yet, set the property
 173    * to zero. To indicate completion, set the property to %G_MAXINT.
 174    *
 175    * Since: 2.12
 176    */
 177   g_object_class_install_property (object_class,
 178                                    PROP_PULSE,
 179                                    g_param_spec_int ("pulse",
 180                                                      P_("Pulse"),
 181                                                      P_("Set this to positive values to indicate that some progress is made, but you don't know how much."),
 182                                                      -1, G_MAXINT, -1,
 183                                                      GTK_PARAM_READWRITE));
 184
 185   /**
 186    * GtkCellRendererProgress:text-xalign:
 187    *
 188    * The "text-xalign" property controls the horizontal alignment of the
 189    * text in the progress bar.  Valid values range from 0 (left) to 1
 190    * (right).  Reserved for RTL layouts.
 191    *
 192    * Since: 2.12
 193    */
 194   g_object_class_install_property (object_class,
 195                                    PROP_TEXT_XALIGN,
 196                                    g_param_spec_float ("text-xalign",
 197                                                        P_("Text x alignment"),
 198                                                        P_("The horizontal text alignment, from 0 (left) to 1 (right). Reversed for RTL layouts."),
 199                                                        0.0, 1.0, 0.5,
 200                                                        GTK_PARAM_READWRITE));
 201
 202   /**
 203    * GtkCellRendererProgress:text-yalign:
 204    *
 205    * The "text-yalign" property controls the vertical alignment of the
 206    * text in the progress bar.  Valid values range from 0 (top) to 1
 207    * (bottom).
 208    *
 209    * Since: 2.12
 210    */
 211   g_object_class_install_property (object_class,
 212                                    PROP_TEXT_YALIGN,
 213                                    g_param_spec_float ("text-yalign",
 214                                                        P_("Text y alignment"),
 215                                                        P_("The vertical text alignment, from 0 (top) to 1 (bottom)."),
 216                                                        0.0, 1.0, 0.5,
 217                                                        GTK_PARAM_READWRITE));
 218
 219   g_object_class_override_property (object_class,
 220                                     PROP_ORIENTATION,
 221                                     "orientation");
 222
 223   g_object_class_install_property (object_class,
 224                                    PROP_INVERTED,
 225                                    g_param_spec_boolean ("inverted",
 226                                                          P_("Inverted"),
 227                                                          P_("Invert the direction in which the progress bar grows"),
 228                                                          FALSE,
 229                                                          GTK_PARAM_READWRITE));
 230
 231   g_type_class_add_private (object_class,
 232                             sizeof (GtkCellRendererProgressPrivate));
 233 }
 234
 235 static void
 236 gtk_cell_renderer_progress_init (GtkCellRendererProgress *cellprogress)
 237 {
 238   GtkCellRendererProgressPrivate *priv;
 239
 240   cellprogress->priv = G_TYPE_INSTANCE_GET_PRIVATE (cellprogress,
 241                                                     GTK_TYPE_CELL_RENDERER_PROGRESS,
 242                                                     GtkCellRendererProgressPrivate);
 243   priv = cellprogress->priv;
 244
 245   priv->value = 0;
 246   priv->text = NULL;
 247   priv->label = NULL;
 248   priv->min_w = -1;
 249   priv->min_h = -1;
 250   priv->pulse = -1;
 251   priv->offset = 0;
 252
 253   priv->text_xalign = 0.5;
 254   priv->text_yalign = 0.5;
 255
 256   priv->orientation = GTK_ORIENTATION_HORIZONTAL,
 257   priv->inverted = FALSE;
 258 }
 259
 260
 261 /**
 262  * gtk_cell_renderer_progress_new:
 263  *
 264  * Creates a new #GtkCellRendererProgress.
 265  *
 266  * Return value: the new cell renderer
 267  *
 268  * Since: 2.6
 269  **/
 270 GtkCellRenderer*
 271 gtk_cell_renderer_progress_new (void)
 272 {
 273   return g_object_new (GTK_TYPE_CELL_RENDERER_PROGRESS, NULL);
 274 }
 275
 276 static void
 277 gtk_cell_renderer_progress_finalize (GObject *object)
 278 {
 279   GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (object);
 280   GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 281
 282   g_free (priv->text);
 283   g_free (priv->label);
 284
 285   G_OBJECT_CLASS (gtk_cell_renderer_progress_parent_class)->finalize (object);
 286 }
 287
 288 static void
 289 gtk_cell_renderer_progress_get_property (GObject *object,
 290                                          guint param_id,
 291                                          GValue *value,
 292                                          GParamSpec *pspec)
 293 {
 294   GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (object);
 295   GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 296
 297   switch (param_id)
 298     {
 299     case PROP_VALUE:
 300       g_value_set_int (value, priv->value);
 301       break;
 302     case PROP_TEXT:
 303       g_value_set_string (value, priv->text);
 304       break;
 305     case PROP_PULSE:
 306       g_value_set_int (value, priv->pulse);
 307       break;
 308     case PROP_TEXT_XALIGN:
 309       g_value_set_float (value, priv->text_xalign);
 310       break;
 311     case PROP_TEXT_YALIGN:
 312       g_value_set_float (value, priv->text_yalign);
 313       break;
 314     case PROP_ORIENTATION:
 315       g_value_set_enum (value, priv->orientation);
 316       break;
 317     case PROP_INVERTED:
 318       g_value_set_boolean (value, priv->inverted);
 319       break;
 320     default:
 321       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 322     }
 323 }
 324
 325 static void
 326 gtk_cell_renderer_progress_set_property (GObject *object,
 327                                          guint param_id,
 328                                          const GValue *value,
 329                                          GParamSpec   *pspec)
 330 {
 331   GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (object);
 332   GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 333
 334   switch (param_id)
 335     {
 336     case PROP_VALUE:
 337       gtk_cell_renderer_progress_set_value (cellprogress,
 338                                             g_value_get_int (value));
 339       break;
 340     case PROP_TEXT:
 341       gtk_cell_renderer_progress_set_text (cellprogress,
 342                                            g_value_get_string (value));
 343       break;
 344     case PROP_PULSE:
 345       gtk_cell_renderer_progress_set_pulse (cellprogress,
 346                                             g_value_get_int (value));
 347       break;
 348     case PROP_TEXT_XALIGN:
 349       priv->text_xalign = g_value_get_float (value);
 350       break;
 351     case PROP_TEXT_YALIGN:
 352       priv->text_yalign = g_value_get_float (value);
 353       break;
 354     case PROP_ORIENTATION:
 355       priv->orientation = g_value_get_enum (value);
 356       break;
 357     case PROP_INVERTED:
 358       priv->orientation = g_value_get_boolean (value);
 359       break;
 360     default:
 361       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 362     }
 363 }
 364
 365 static void
 366 recompute_label (GtkCellRendererProgress *cellprogress)
 367 {
 368   GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 369   gchar *label;
 370
 371   if (priv->text)
 372     label = g_strdup (priv->text);
 373   else if (priv->pulse < 0)
 374     label = g_strdup_printf (C_("progress bar label", "%d %%"), priv->value);
 375   else
 376     label = NULL;
 377
 378   g_free (priv->label);
 379   priv->label = label;
 380 }
 381
 382 static void
 383 gtk_cell_renderer_progress_set_value (GtkCellRendererProgress *cellprogress,
 384                                       gint                     value)
 385 {
 386   cellprogress->priv->value = value;
 387
 388   recompute_label (cellprogress);
 389 }
 390
 391 static void
 392 gtk_cell_renderer_progress_set_text (GtkCellRendererProgress *cellprogress,
 393                                      const gchar             *text)
 394 {
 395   gchar *new_text;
 396
 397   new_text = g_strdup (text);
 398   g_free (cellprogress->priv->text);
 399   cellprogress->priv->text = new_text;
 400
 401   recompute_label (cellprogress);
 402 }
 403
 404 static void
 405 gtk_cell_renderer_progress_set_pulse (GtkCellRendererProgress *cellprogress,
 406                                       gint                     pulse)
 407 {
 408    GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 409
 410    if (pulse != priv->pulse)
 411      {
 412        if (pulse <= 0)
 413          priv->offset = 0;
 414        else
 415          priv->offset = pulse;
 416      }
 417
 418    priv->pulse = pulse;
 419
 420    recompute_label (cellprogress);
 421 }
 422
 423 static void
 424 compute_dimensions (GtkCellRenderer *cell,
 425                     GtkWidget       *widget,
 426                     const gchar     *text,
 427                     gint            *width,
 428                     gint            *height)
 429 {
 430   PangoRectangle logical_rect;
 431   PangoLayout *layout;
 432   gint xpad, ypad;
 433
 434   layout = gtk_widget_create_pango_layout (widget, text);
 435   pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
 436
 437   gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
 438
 439   if (width)
 440     *width = logical_rect.width + xpad * 2;
 441
 442   if (height)
 443     *height = logical_rect.height + ypad * 2;
 444
 445   g_object_unref (layout);
 446 }
 447
 448 static void
 449 gtk_cell_renderer_progress_get_size (GtkCellRenderer    *cell,
 450                                      GtkWidget          *widget,
 451                                      const GdkRectangle *cell_area,
 452                                      gint               *x_offset,
 453                                      gint               *y_offset,
 454                                      gint               *width,
 455                                      gint               *height)
 456 {
 457   GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (cell);
 458   GtkCellRendererProgressPrivate *priv = cellprogress->priv;
 459   gint w, h;
 460   gchar *text;
 461
 462   if (priv->min_w < 0)
 463     {
 464       text = g_strdup_printf (C_("progress bar label", "%d %%"), 100);
 465       compute_dimensions (cell, widget, text,
 466                           &priv->min_w,
 467                           &priv->min_h);
 468       g_free (text);
 469     }
 470
 471   compute_dimensions (cell, widget, priv->label, &w, &h);
 472
 473   if (width)
 474     *width = MAX (priv->min_w, w);
 475
 476   if (height)
 477     *height = MIN (priv->min_h, h);
 478
 479   /* FIXME: at the moment cell_area is only set when we are requesting
 480    * the size for drawing the focus rectangle. We now just return
 481    * the last size we used for drawing the progress bar, which will
 482    * work for now. Not a really nice solution though.
 483    */
 484   if (cell_area)
 485     {
 486       if (width)
 487         *width = cell_area->width;
 488       if (height)
 489         *height = cell_area->height;
 490     }
 491
 492   if (x_offset) *x_offset = 0;
 493   if (y_offset) *y_offset = 0;
 494 }
 495
 496 static inline gint
 497 get_bar_size (gint pulse,
 498               gint value,
 499               gint full_size)
 500 {
 501   gint bar_size;
 502
 503   if (pulse < 0)
 504     bar_size = full_size * MAX (0, value) / 100;
 505   else if (pulse == 0)
 506     bar_size = 0;
 507   else if (pulse == G_MAXINT)
 508     bar_size = full_size;
 509   else
 510     bar_size = MAX (2, full_size / 5);
 511
 512   return bar_size;
 513 }
 514
 515 static inline gint
 516 get_bar_position (gint     start,
 517                   gint     full_size,
 518                   gint     bar_size,
 519                   gint     pulse,
 520                   gint     offset,
 521                   gboolean is_rtl)
 522 {
 523   gint position;
 524
 525   if (pulse < 0 || pulse == 0 || pulse == G_MAXINT)
 526     {
 527       position = is_rtl ? (start + full_size - bar_size) : start;
 528     }
 529   else
 530     {
 531       position = (is_rtl ? offset + 12 : offset) % 24;
 532       if (position > 12)
 533         position = 24 - position;
 534       position = start + full_size * position / 15;
 535     }
 536
 537   return position;
 538 }
 539
 540 static void
 541 gtk_cell_renderer_progress_render (GtkCellRenderer      *cell,
 542                                    cairo_t              *cr,
 543                                    GtkWidget            *widget,
 544                                    const GdkRectangle   *background_area,
 545                                    const GdkRectangle   *cell_area,
 546                                    GtkCellRendererState  flags)
 547 {
 548   GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (cell);
 549   GtkCellRendererProgressPrivate *priv= cellprogress->priv;
 550   GtkStyleContext *context;
 551   GtkBorder padding, border;
 552   PangoLayout *layout;
 553   PangoRectangle logical_rect;
 554   gint x, y, w, h, x_pos, y_pos, bar_position, bar_size, start, full_size;
 555   gint xpad, ypad;
 556   GdkRectangle clip;
 557   gboolean is_rtl;
 558
 559   context = gtk_widget_get_style_context (widget);
 560   is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
 561
 562   gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
 563   x = cell_area->x + xpad;
 564   y = cell_area->y + ypad;
 565   w = cell_area->width - xpad * 2;
 566   h = cell_area->height - ypad * 2;
 567
 568   gtk_style_context_save (context);
 569   gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
 570
 571   gtk_render_background (context, cr, x, y, w, h);
 572   gtk_render_frame (context, cr, x, y, w, h);
 573
 574   gtk_style_context_get_border (context, GTK_STATE_FLAG_NORMAL, &border);
 575   gtk_style_context_get_padding (context, GTK_STATE_FLAG_NORMAL, &padding);
 576
 577   x += border.left + padding.left;
 578   y += border.top + padding.top;
 579   w -= border.left + border.right + padding.left + padding.right;
 580   h -= border.top + border.bottom + padding.top + padding.bottom;
 581
 582   gtk_style_context_restore (context);
 583
 584   if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 585     {
 586       clip.y = y;
 587       clip.height = h;
 588
 589       start = x;
 590       full_size = w;
 591
 592       bar_size = get_bar_size (priv->pulse, priv->value, full_size);
 593
 594       if (!priv->inverted)
 595         bar_position = get_bar_position (start, full_size, bar_size,
 596                                          priv->pulse, priv->offset, is_rtl);
 597       else
 598         bar_position = get_bar_position (start, full_size, bar_size,
 599                                          priv->pulse, priv->offset, !is_rtl);
 600
 601       clip.width = bar_size;
 602       clip.x = bar_position;
 603     }
 604   else
 605     {
 606       clip.x = x;
 607       clip.width = w;
 608
 609       start = y;
 610       full_size = h;
 611
 612       bar_size = get_bar_size (priv->pulse, priv->value, full_size);
 613
 614       if (priv->inverted)
 615         bar_position = get_bar_position (start, full_size, bar_size,
 616                                          priv->pulse, priv->offset, TRUE);
 617       else
 618         bar_position = get_bar_position (start, full_size, bar_size,
 619                                          priv->pulse, priv->offset, FALSE);
 620
 621       clip.height = bar_size;
 622       clip.y = bar_position;
 623     }
 624
 625   gtk_style_context_save (context);
 626   gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
 627
 628   if (bar_size > 0)
 629     gtk_render_activity (context, cr,
 630                          clip.x, clip.y,
 631                          clip.width, clip.height);
 632
 633   gtk_style_context_restore (context);
 634
 635   if (priv->label)
 636     {
 637       gfloat text_xalign;
 638
 639       layout = gtk_widget_create_pango_layout (widget, priv->label);
 640       pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
 641
 642       if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
 643         text_xalign = 1.0 - priv->text_xalign;
 644       else
 645         text_xalign = priv->text_xalign;
 646
 647       x_pos = x + padding.left + text_xalign *
 648         (w - padding.left - padding.right - logical_rect.width);
 649
 650       y_pos = y + padding.top + priv->text_yalign *
 651         (h - padding.top - padding.bottom - logical_rect.height);
 652
 653       cairo_save (cr);
 654       gdk_cairo_rectangle (cr, &clip);
 655       cairo_clip (cr);
 656
 657       gtk_style_context_save (context);
 658       gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
 659
 660       gtk_render_layout (context, cr,
 661                          x_pos, y_pos,
 662                          layout);
 663
 664       gtk_style_context_restore (context);
 665       cairo_restore (cr);
 666
 667       gtk_style_context_save (context);
 668       gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
 669
 670       if (bar_position > start)
 671         {
 672           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 673             {
 674               clip.x = x;
 675               clip.width = bar_position - x;
 676             }
 677           else
 678             {
 679               clip.y = y;
 680               clip.height = bar_position - y;
 681             }
 682
 683           cairo_save (cr);
 684           gdk_cairo_rectangle (cr, &clip);
 685           cairo_clip (cr);
 686
 687           gtk_render_layout (context, cr,
 688                              x_pos, y_pos,
 689                              layout);
 690
 691           cairo_restore (cr);
 692         }
 693
 694       if (bar_position + bar_size < start + full_size)
 695         {
 696           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 697             {
 698               clip.x = bar_position + bar_size;
 699               clip.width = x + w - (bar_position + bar_size);
 700             }
 701           else
 702             {
 703               clip.y = bar_position + bar_size;
 704               clip.height = y + h - (bar_position + bar_size);
 705             }
 706
 707           cairo_save (cr);
 708           gdk_cairo_rectangle (cr, &clip);
 709           cairo_clip (cr);
 710
 711           gtk_render_layout (context, cr,
 712                              x_pos, y_pos,
 713                              layout);
 714
 715           cairo_restore (cr);
 716         }
 717
 718       gtk_style_context_restore (context);
 719       g_object_unref (layout);
 720     }
 721 }