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

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #if HAVE_CONFIG_H
  28 #  include <config.h>
  29 #  if STDC_HEADERS
  30 #    include <string.h>
  31 #    include <stdio.h>
  32 #  endif
  33 #else
  34 #  include <stdio.h>
  35 #endif
  36
  37 #include "gtkprogressbar.h"
  38 #include "gtksignal.h"
  39 #include "gtkintl.h"
  40
  41
  42 #define MIN_HORIZONTAL_BAR_WIDTH   150
  43 #define MIN_HORIZONTAL_BAR_HEIGHT  20
  44 #define MIN_VERTICAL_BAR_WIDTH     22
  45 #define MIN_VERTICAL_BAR_HEIGHT    80
  46 #define MAX_TEXT_LENGTH            80
  47 #define TEXT_SPACING               2
  48
  49 enum {
  50   PROP_0,
  51
  52   /* Supported args */
  53   PROP_FRACTION,
  54   PROP_PULSE_STEP,
  55   PROP_ORIENTATION,
  56   PROP_TEXT,
  57
  58   /* Deprecated args */
  59   PROP_ADJUSTMENT,
  60   PROP_BAR_STYLE,
  61   PROP_ACTIVITY_STEP,
  62   PROP_ACTIVITY_BLOCKS,
  63   PROP_DISCRETE_BLOCKS
  64 };
  65
  66 static void gtk_progress_bar_class_init    (GtkProgressBarClass *klass);
  67 static void gtk_progress_bar_init          (GtkProgressBar      *pbar);
  68 static void gtk_progress_bar_set_property  (GObject             *object,
  69                                             guint                prop_id,
  70                                             const GValue        *value,
  71                                             GParamSpec          *pspec);
  72 static void gtk_progress_bar_get_property  (GObject             *object,
  73                                             guint                prop_id,
  74                                             GValue              *value,
  75                                             GParamSpec          *pspec);
  76 static void gtk_progress_bar_size_request  (GtkWidget           *widget,
  77                                             GtkRequisition      *requisition);
  78 static void gtk_progress_bar_real_update   (GtkProgress         *progress);
  79 static void gtk_progress_bar_paint         (GtkProgress         *progress);
  80 static void gtk_progress_bar_act_mode_enter (GtkProgress        *progress);
  81
  82
  83 GtkType
  84 gtk_progress_bar_get_type (void)
  85 {
  86   static GtkType progress_bar_type = 0;
  87
  88   if (!progress_bar_type)
  89     {
  90       static const GtkTypeInfo progress_bar_info =
  91       {
  92         "GtkProgressBar",
  93         sizeof (GtkProgressBar),
  94         sizeof (GtkProgressBarClass),
  95         (GtkClassInitFunc) gtk_progress_bar_class_init,
  96         (GtkObjectInitFunc) gtk_progress_bar_init,
  97         /* reserved_1 */ NULL,
  98         /* reserved_2 */ NULL,
  99         (GtkClassInitFunc) NULL
 100       };
 101
 102       progress_bar_type = gtk_type_unique (GTK_TYPE_PROGRESS, &progress_bar_info);
 103     }
 104
 105   return progress_bar_type;
 106 }
 107
 108 static void
 109 gtk_progress_bar_class_init (GtkProgressBarClass *class)
 110 {
 111   GObjectClass *gobject_class;
 112   GtkWidgetClass *widget_class;
 113   GtkProgressClass *progress_class;
 114
 115   gobject_class = G_OBJECT_CLASS (class);
 116   widget_class = (GtkWidgetClass *) class;
 117   progress_class = (GtkProgressClass *) class;
 118
 119   gobject_class->set_property = gtk_progress_bar_set_property;
 120   gobject_class->get_property = gtk_progress_bar_get_property;
 121
 122   widget_class->size_request = gtk_progress_bar_size_request;
 123
 124   progress_class->paint = gtk_progress_bar_paint;
 125   progress_class->update = gtk_progress_bar_real_update;
 126   progress_class->act_mode_enter = gtk_progress_bar_act_mode_enter;
 127
 128   g_object_class_install_property (gobject_class,
 129                                    PROP_ADJUSTMENT,
 130                                    g_param_spec_object ("adjustment",
 131                                                         _("Adjustment"),
 132                                                         _("The GtkAdjustment connected to the progress bar (Deprecated)"),
 133                                                         GTK_TYPE_ADJUSTMENT,
 134                                                         G_PARAM_READWRITE));
 135
 136   g_object_class_install_property (gobject_class,
 137                                    PROP_ORIENTATION,
 138                                    g_param_spec_enum ("orientation",
 139                                                       _("Orientation"),
 140                                                       _("Orientation and growth of the progress bar"),
 141                                                       GTK_TYPE_PROGRESS_BAR_ORIENTATION,
 142                                                       GTK_PROGRESS_LEFT_TO_RIGHT,
 143                                                       G_PARAM_READWRITE));
 144
 145   g_object_class_install_property (gobject_class,
 146                                    PROP_BAR_STYLE,
 147                                    g_param_spec_enum ("bar_style",
 148                                                       _("Bar style"),
 149                                                       _("Specifies the visual style of the bar in percentage mode (Deprecated)"),
 150                                                       GTK_TYPE_PROGRESS_BAR_STYLE,
 151                                                       GTK_PROGRESS_CONTINUOUS,
 152                                                       G_PARAM_READWRITE));
 153
 154   g_object_class_install_property (gobject_class,
 155                                    PROP_ACTIVITY_STEP,
 156                                    g_param_spec_uint ("activity_step",
 157                                                       _("Activity Step"),
 158                                                       _("The increment used for each iteration in activity mode (Deprecated)"),
 159                                                       -G_MAXUINT,
 160                                                       G_MAXUINT,
 161                                                       3,
 162                                                       G_PARAM_READWRITE));
 163
 164   g_object_class_install_property (gobject_class,
 165                                    PROP_ACTIVITY_BLOCKS,
 166                                    g_param_spec_uint ("activity_blocks",
 167                                                       _("Activity Blocks"),
 168                                                       _("The number of blocks which can fit in the progress bar area in activity mode (Deprecated)"),
 169                                                       2,
 170                                                       G_MAXUINT,
 171                                                       5,
 172                                                       G_PARAM_READWRITE));
 173
 174   g_object_class_install_property (gobject_class,
 175                                    PROP_DISCRETE_BLOCKS,
 176                                    g_param_spec_uint ("discrete_blocks",
 177                                                       _("Discrete Blocks"),
 178                                                       _("The number of discrete blocks in a progress bar (when shown in the discrete style"),
 179                                                       2,
 180                                                       G_MAXUINT,
 181                                                       10,
 182                                                       G_PARAM_READWRITE));
 183
 184   g_object_class_install_property (gobject_class,
 185                                    PROP_FRACTION,
 186                                    g_param_spec_double ("fraction",
 187                                                         _("Fraction"),
 188                                                         _("The fraction of total work that has been completed"),
 189                                                         0.0,
 190                                                         1.0,
 191                                                         0.0,
 192                                                         G_PARAM_READWRITE));
 193
 194   g_object_class_install_property (gobject_class,
 195                                    PROP_PULSE_STEP,
 196                                    g_param_spec_double ("pulse_step",
 197                                                         _("Pulse Step"),
 198                                                         _("The fraction of total progress to move the bouncing block when pulsed"),
 199                                                         0.0,
 200                                                         1.0,
 201                                                         0.1,
 202                                                         G_PARAM_READWRITE));
 203
 204   g_object_class_install_property (gobject_class,
 205                                    PROP_TEXT,
 206                                    g_param_spec_string ("text",
 207                                                         _("Text"),
 208                                                         _("Text to be displayed in the progress bar"),
 209                                                         "%P %%",
 210                                                         G_PARAM_READWRITE));
 211
 212 }
 213
 214 static void
 215 gtk_progress_bar_init (GtkProgressBar *pbar)
 216 {
 217   pbar->bar_style = GTK_PROGRESS_CONTINUOUS;
 218   pbar->blocks = 10;
 219   pbar->in_block = -1;
 220   pbar->orientation = GTK_PROGRESS_LEFT_TO_RIGHT;
 221   pbar->pulse_fraction = 0.1;
 222   pbar->activity_pos = 0;
 223   pbar->activity_dir = 1;
 224   pbar->activity_step = 3;
 225   pbar->activity_blocks = 5;
 226 }
 227
 228 static void
 229 gtk_progress_bar_set_property (GObject      *object,
 230                                guint         prop_id,
 231                                const GValue *value,
 232                                GParamSpec   *pspec)
 233 {
 234   GtkProgressBar *pbar;
 235
 236   pbar = GTK_PROGRESS_BAR (object);
 237
 238   switch (prop_id)
 239     {
 240     case PROP_ADJUSTMENT:
 241       gtk_progress_set_adjustment (GTK_PROGRESS (pbar),
 242                                    GTK_ADJUSTMENT (g_value_get_object (value)));
 243       break;
 244     case PROP_ORIENTATION:
 245       gtk_progress_bar_set_orientation (pbar, g_value_get_enum (value));
 246       break;
 247     case PROP_BAR_STYLE:
 248       gtk_progress_bar_set_bar_style (pbar, g_value_get_enum (value));
 249       break;
 250     case PROP_ACTIVITY_STEP:
 251       gtk_progress_bar_set_activity_step (pbar, g_value_get_uint (value));
 252       break;
 253     case PROP_ACTIVITY_BLOCKS:
 254       gtk_progress_bar_set_activity_blocks (pbar, g_value_get_uint (value));
 255       break;
 256     case PROP_DISCRETE_BLOCKS:
 257       gtk_progress_bar_set_discrete_blocks (pbar, g_value_get_uint (value));
 258       break;
 259     case PROP_FRACTION:
 260       gtk_progress_bar_set_fraction (pbar, g_value_get_double (value));
 261       break;
 262     case PROP_PULSE_STEP:
 263       gtk_progress_bar_set_pulse_step (pbar, g_value_get_double (value));
 264       break;
 265     case PROP_TEXT:
 266       gtk_progress_bar_set_text (pbar, g_value_get_string (value));
 267       break;
 268     default:
 269       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 270       break;
 271     }
 272 }
 273
 274 static void
 275 gtk_progress_bar_get_property (GObject      *object,
 276                                guint         prop_id,
 277                                GValue       *value,
 278                                GParamSpec   *pspec)
 279 {
 280   GtkProgressBar *pbar;
 281
 282   pbar = GTK_PROGRESS_BAR (object);
 283
 284   switch (prop_id)
 285     {
 286     case PROP_ADJUSTMENT:
 287       g_value_set_object (value, G_OBJECT (GTK_PROGRESS (pbar)->adjustment));
 288       break;
 289     case PROP_ORIENTATION:
 290       g_value_set_enum (value, pbar->orientation);
 291       break;
 292     case PROP_BAR_STYLE:
 293       g_value_set_enum (value, pbar->bar_style);
 294       break;
 295     case PROP_ACTIVITY_STEP:
 296       g_value_set_uint (value, pbar->activity_step);
 297       break;
 298     case PROP_ACTIVITY_BLOCKS:
 299       g_value_set_uint (value, pbar->activity_blocks);
 300       break;
 301     case PROP_DISCRETE_BLOCKS:
 302       g_value_set_uint (value, pbar->blocks);
 303       break;
 304     case PROP_FRACTION:
 305       g_value_set_double (value, gtk_progress_get_current_percentage (GTK_PROGRESS (pbar)));
 306       break;
 307     case PROP_PULSE_STEP:
 308       g_value_set_double (value, pbar->pulse_fraction);
 309       break;
 310     case PROP_TEXT:
 311       g_value_set_string (value, gtk_progress_bar_get_text (pbar));
 312       break;
 313     default:
 314       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 315       break;
 316     }
 317 }
 318
 319 GtkWidget*
 320 gtk_progress_bar_new (void)
 321 {
 322   GtkWidget *pbar;
 323
 324   pbar = gtk_widget_new (GTK_TYPE_PROGRESS_BAR, NULL);
 325
 326   return pbar;
 327 }
 328
 329 GtkWidget*
 330 gtk_progress_bar_new_with_adjustment (GtkAdjustment *adjustment)
 331 {
 332   GtkWidget *pbar;
 333
 334   g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), NULL);
 335
 336   pbar = gtk_widget_new (GTK_TYPE_PROGRESS_BAR,
 337                          "adjustment", adjustment,
 338                          NULL);
 339
 340   return pbar;
 341 }
 342
 343 static void
 344 gtk_progress_bar_real_update (GtkProgress *progress)
 345 {
 346   GtkProgressBar *pbar;
 347   GtkWidget *widget;
 348
 349   g_return_if_fail (GTK_IS_PROGRESS (progress));
 350
 351   pbar = GTK_PROGRESS_BAR (progress);
 352   widget = GTK_WIDGET (progress);
 353
 354   if (pbar->bar_style == GTK_PROGRESS_CONTINUOUS ||
 355       GTK_PROGRESS (pbar)->activity_mode)
 356     {
 357       if (GTK_PROGRESS (pbar)->activity_mode)
 358         {
 359           guint size;
 360
 361           /* advance the block */
 362
 363           if (pbar->orientation == GTK_PROGRESS_LEFT_TO_RIGHT ||
 364               pbar->orientation == GTK_PROGRESS_RIGHT_TO_LEFT)
 365             {
 366               /* Update our activity step. */
 367
 368               pbar->activity_step = widget->allocation.width * pbar->pulse_fraction;
 369
 370               size = MAX (2, widget->allocation.width / pbar->activity_blocks);
 371
 372               if (pbar->activity_dir == 0)
 373                 {
 374                   pbar->activity_pos += pbar->activity_step;
 375                   if (pbar->activity_pos + size >=
 376                       widget->allocation.width -
 377                       widget->style->xthickness)
 378                     {
 379                       pbar->activity_pos = widget->allocation.width -
 380                         widget->style->xthickness - size;
 381                       pbar->activity_dir = 1;
 382                     }
 383                 }
 384               else
 385                 {
 386                   pbar->activity_pos -= pbar->activity_step;
 387                   if (pbar->activity_pos <= widget->style->xthickness)
 388                     {
 389                       pbar->activity_pos = widget->style->xthickness;
 390                       pbar->activity_dir = 0;
 391                     }
 392                 }
 393             }
 394           else
 395             {
 396               /* Update our activity step. */
 397
 398               pbar->activity_step = widget->allocation.height * pbar->pulse_fraction;
 399
 400               size = MAX (2, widget->allocation.height / pbar->activity_blocks);
 401
 402               if (pbar->activity_dir == 0)
 403                 {
 404                   pbar->activity_pos += pbar->activity_step;
 405                   if (pbar->activity_pos + size >=
 406                       widget->allocation.height -
 407                       widget->style->ythickness)
 408                     {
 409                       pbar->activity_pos = widget->allocation.height -
 410                         widget->style->ythickness - size;
 411                       pbar->activity_dir = 1;
 412                     }
 413                 }
 414               else
 415                 {
 416                   pbar->activity_pos -= pbar->activity_step;
 417                   if (pbar->activity_pos <= widget->style->ythickness)
 418                     {
 419                       pbar->activity_pos = widget->style->ythickness;
 420                       pbar->activity_dir = 0;
 421                     }
 422                 }
 423             }
 424         }
 425       gtk_progress_bar_paint (progress);
 426       gtk_widget_queue_draw (GTK_WIDGET (progress));
 427     }
 428   else
 429     {
 430       gint in_block;
 431
 432       in_block = -1 + (gint)(gtk_progress_get_current_percentage (progress) *
 433                              (gdouble)pbar->blocks);
 434
 435       if (pbar->in_block != in_block)
 436         {
 437           pbar->in_block = in_block;
 438           gtk_progress_bar_paint (progress);
 439           gtk_widget_queue_draw (GTK_WIDGET (progress));
 440         }
 441     }
 442 }
 443
 444 static void
 445 gtk_progress_bar_size_request (GtkWidget      *widget,
 446                                GtkRequisition *requisition)
 447 {
 448   GtkProgress *progress;
 449   GtkProgressBar *pbar;
 450   gchar *buf;
 451   PangoRectangle logical_rect;
 452   PangoLayout *layout;
 453
 454   g_return_if_fail (GTK_IS_PROGRESS_BAR (widget));
 455   g_return_if_fail (requisition != NULL);
 456
 457   progress = GTK_PROGRESS (widget);
 458   pbar = GTK_PROGRESS_BAR (widget);
 459
 460   if (progress->show_text && pbar->bar_style != GTK_PROGRESS_DISCRETE)
 461     {
 462       buf = gtk_progress_get_text_from_value (progress, progress->adjustment->upper);
 463
 464       layout = gtk_widget_create_pango_layout (widget, buf);
 465       pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
 466
 467       g_object_unref (G_OBJECT (layout));
 468       g_free (buf);
 469     }
 470
 471   if (pbar->orientation == GTK_PROGRESS_LEFT_TO_RIGHT ||
 472       pbar->orientation == GTK_PROGRESS_RIGHT_TO_LEFT)
 473     {
 474       if (progress->show_text && pbar->bar_style != GTK_PROGRESS_DISCRETE)
 475         {
 476           requisition->width = MAX (MIN_HORIZONTAL_BAR_WIDTH,
 477                                     2 * widget->style->xthickness + 3 +
 478                                     logical_rect.width + 2 * TEXT_SPACING);
 479
 480           requisition->height = MAX (MIN_HORIZONTAL_BAR_HEIGHT,
 481                                      2 * widget->style->ythickness + 3 +
 482                                      logical_rect.height + 2 * TEXT_SPACING);
 483         }
 484       else
 485         {
 486           requisition->width = MIN_HORIZONTAL_BAR_WIDTH;
 487           requisition->height = MIN_HORIZONTAL_BAR_HEIGHT;
 488         }
 489     }
 490   else
 491     {
 492       if (progress->show_text && pbar->bar_style != GTK_PROGRESS_DISCRETE)
 493         {
 494           requisition->width = MAX (MIN_VERTICAL_BAR_WIDTH,
 495                                     2 * widget->style->xthickness + 3 +
 496                                     logical_rect.width + 2 * TEXT_SPACING);
 497
 498           requisition->height = MAX (MIN_VERTICAL_BAR_HEIGHT,
 499                                      2 * widget->style->ythickness + 3 +
 500                                      logical_rect.height + 2 * TEXT_SPACING);
 501         }
 502       else
 503         {
 504           requisition->width = MIN_VERTICAL_BAR_WIDTH;
 505           requisition->height = MIN_VERTICAL_BAR_HEIGHT;
 506         }
 507     }
 508 }
 509
 510 static void
 511 gtk_progress_bar_act_mode_enter (GtkProgress *progress)
 512 {
 513   GtkProgressBar *pbar;
 514   GtkWidget *widget;
 515   gint size;
 516
 517   pbar = GTK_PROGRESS_BAR (progress);
 518   widget = GTK_WIDGET (progress);
 519
 520   /* calculate start pos */
 521
 522   if (pbar->orientation == GTK_PROGRESS_LEFT_TO_RIGHT ||
 523       pbar->orientation == GTK_PROGRESS_RIGHT_TO_LEFT)
 524     {
 525       size = MAX (2, widget->allocation.width / pbar->activity_blocks);
 526
 527       if (pbar->orientation == GTK_PROGRESS_LEFT_TO_RIGHT)
 528         {
 529           pbar->activity_pos = widget->style->xthickness;
 530           pbar->activity_dir = 0;
 531         }
 532       else
 533         {
 534           pbar->activity_pos = widget->allocation.width -
 535             widget->style->xthickness - (widget->allocation.height -
 536                 widget->style->ythickness * 2);
 537           pbar->activity_dir = 1;
 538         }
 539     }
 540   else
 541     {
 542       size = MAX (2, widget->allocation.height / pbar->activity_blocks);
 543
 544       if (pbar->orientation == GTK_PROGRESS_TOP_TO_BOTTOM)
 545         {
 546           pbar->activity_pos = widget->style->ythickness;
 547           pbar->activity_dir = 0;
 548         }
 549       else
 550         {
 551           pbar->activity_pos = widget->allocation.height -
 552             widget->style->ythickness - (widget->allocation.width -
 553                 widget->style->xthickness * 2);
 554           pbar->activity_dir = 1;
 555         }
 556     }
 557 }
 558
 559 static void
 560 gtk_progress_bar_paint (GtkProgress *progress)
 561 {
 562   GtkProgressBar *pbar;
 563   GtkWidget *widget;
 564   gint amount;
 565   gint block_delta = 0;
 566   gint space = 0;
 567   gint i;
 568   gint x;
 569   gint y;
 570   gdouble percentage;
 571   gint size;
 572
 573   g_return_if_fail (GTK_IS_PROGRESS_BAR (progress));
 574
 575   pbar = GTK_PROGRESS_BAR (progress);
 576   widget = GTK_WIDGET (progress);
 577
 578   if (pbar->orientation == GTK_PROGRESS_LEFT_TO_RIGHT ||
 579       pbar->orientation == GTK_PROGRESS_RIGHT_TO_LEFT)
 580     space = widget->allocation.width -
 581       2 * widget->style->xthickness;
 582   else
 583     space = widget->allocation.height -
 584       2 * widget->style->ythickness;
 585
 586   percentage = gtk_progress_get_current_percentage (progress);
 587
 588   if (progress->offscreen_pixmap)
 589     {
 590       gtk_paint_box (widget->style,
 591                      progress->offscreen_pixmap,
 592                      GTK_STATE_NORMAL, GTK_SHADOW_IN,
 593                      NULL, widget, "trough",
 594                      0, 0,
 595                      widget->allocation.width,
 596                      widget->allocation.height);
 597
 598       if (progress->activity_mode)
 599         {
 600           if (pbar->orientation == GTK_PROGRESS_LEFT_TO_RIGHT ||
 601               pbar->orientation == GTK_PROGRESS_RIGHT_TO_LEFT)
 602             {
 603               size = MAX (2, widget->allocation.width / pbar->activity_blocks);
 604
 605               gtk_paint_box (widget->style,
 606                              progress->offscreen_pixmap,
 607                              GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 608                              NULL, widget, "bar",
 609                              pbar->activity_pos,
 610                              widget->style->ythickness,
 611                              size,
 612                              widget->allocation.height - widget->style->ythickness * 2);
 613               return;
 614             }
 615           else
 616             {
 617               size = MAX (2, widget->allocation.height / pbar->activity_blocks);
 618
 619               gtk_paint_box (widget->style,
 620                              progress->offscreen_pixmap,
 621                              GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 622                              NULL, widget, "bar",
 623                              widget->style->xthickness,
 624                              pbar->activity_pos,
 625                              widget->allocation.width - widget->style->xthickness * 2,
 626                              size);
 627               return;
 628             }
 629         }
 630
 631       amount = percentage * space;
 632
 633       if (amount > 0)
 634         {
 635           switch (pbar->orientation)
 636             {
 637
 638             case GTK_PROGRESS_LEFT_TO_RIGHT:
 639
 640               if (pbar->bar_style == GTK_PROGRESS_CONTINUOUS)
 641                 {
 642                   gtk_paint_box (widget->style,
 643                                  progress->offscreen_pixmap,
 644                                  GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 645                                  NULL, widget, "bar",
 646                                  widget->style->xthickness,
 647                                  widget->style->ythickness,
 648                                  amount,
 649                                  widget->allocation.height - widget->style->ythickness * 2);
 650                 }
 651               else
 652                 {
 653                   x = widget->style->xthickness;
 654
 655                   for (i = 0; i <= pbar->in_block; i++)
 656                     {
 657                       block_delta = (((i + 1) * space) / pbar->blocks)
 658                         - ((i * space) / pbar->blocks);
 659
 660                       gtk_paint_box (widget->style,
 661                                      progress->offscreen_pixmap,
 662                                      GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 663                                      NULL, widget, "bar",
 664                                      x,
 665                                      widget->style->ythickness,
 666                                      block_delta,
 667                                      widget->allocation.height - widget->style->ythickness * 2);
 668
 669                       x +=  block_delta;
 670                     }
 671                 }
 672               break;
 673
 674             case GTK_PROGRESS_RIGHT_TO_LEFT:
 675
 676               if (pbar->bar_style == GTK_PROGRESS_CONTINUOUS)
 677                 {
 678                   gtk_paint_box (widget->style,
 679                                  progress->offscreen_pixmap,
 680                                  GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 681                                  NULL, widget, "bar",
 682                                  widget->allocation.width -
 683                                  widget->style->xthickness - amount,
 684                                  widget->style->ythickness,
 685                                  amount,
 686                                  widget->allocation.height -
 687                                  widget->style->ythickness * 2);
 688                 }
 689               else
 690                 {
 691                   x = widget->allocation.width -
 692                     widget->style->xthickness;
 693
 694                   for (i = 0; i <= pbar->in_block; i++)
 695                     {
 696                       block_delta = (((i + 1) * space) / pbar->blocks) -
 697                         ((i * space) / pbar->blocks);
 698
 699                       x -=  block_delta;
 700
 701                       gtk_paint_box (widget->style,
 702                                      progress->offscreen_pixmap,
 703                                      GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 704                                      NULL, widget, "bar",
 705                                      x,
 706                                      widget->style->ythickness,
 707                                      block_delta,
 708                                      widget->allocation.height -
 709                                      widget->style->ythickness * 2);
 710                     }
 711                 }
 712               break;
 713
 714             case GTK_PROGRESS_BOTTOM_TO_TOP:
 715
 716               if (pbar->bar_style == GTK_PROGRESS_CONTINUOUS)
 717                 {
 718                   gtk_paint_box (widget->style,
 719                                  progress->offscreen_pixmap,
 720                                  GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 721                                  NULL, widget, "bar",
 722                                  widget->style->xthickness,
 723                                  widget->allocation.height -
 724                                  widget->style->ythickness - amount,
 725                                  widget->allocation.width -
 726                                  widget->style->xthickness * 2,
 727                                  amount);
 728                 }
 729               else
 730                 {
 731                   y = widget->allocation.height -
 732                     widget->style->ythickness;
 733
 734                   for (i = 0; i <= pbar->in_block; i++)
 735                     {
 736                       block_delta = (((i + 1) * space) / pbar->blocks) -
 737                         ((i * space) / pbar->blocks);
 738
 739                       y -= block_delta;
 740
 741                       gtk_paint_box (widget->style,
 742                                      progress->offscreen_pixmap,
 743                                      GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 744                                      NULL, widget, "bar",
 745                                      widget->style->xthickness,
 746                                      y,
 747                                      widget->allocation.width -
 748                                      widget->style->xthickness * 2,
 749                                      block_delta);
 750                     }
 751                 }
 752               break;
 753
 754             case GTK_PROGRESS_TOP_TO_BOTTOM:
 755
 756               if (pbar->bar_style == GTK_PROGRESS_CONTINUOUS)
 757                 {
 758                   gtk_paint_box (widget->style,
 759                                  progress->offscreen_pixmap,
 760                                  GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 761                                  NULL, widget, "bar",
 762                                  widget->style->xthickness,
 763                                  widget->style->ythickness,
 764                                  widget->allocation.width -
 765                                  widget->style->xthickness * 2,
 766                                  amount);
 767                 }
 768               else
 769                 {
 770                   y = widget->style->ythickness;
 771
 772                   for (i = 0; i <= pbar->in_block; i++)
 773                     {
 774
 775                       block_delta = (((i + 1) * space) / pbar->blocks)
 776                         - ((i * space) / pbar->blocks);
 777
 778                       gtk_paint_box (widget->style,
 779                                      progress->offscreen_pixmap,
 780                                      GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 781                                      NULL, widget, "bar",
 782                                      widget->style->xthickness,
 783                                      y,
 784                                      widget->allocation.width -
 785                                      widget->style->xthickness * 2,
 786                                      block_delta);
 787
 788                       y += block_delta;
 789                     }
 790                 }
 791               break;
 792
 793             default:
 794               break;
 795             }
 796         }
 797
 798       if (progress->show_text && pbar->bar_style != GTK_PROGRESS_DISCRETE)
 799         {
 800           gint x;
 801           gint y;
 802           gchar *buf;
 803           GdkRectangle rect;
 804           PangoLayout *layout;
 805           PangoRectangle logical_rect;
 806
 807           buf = gtk_progress_get_current_text (progress);
 808
 809           layout = gtk_widget_create_pango_layout (widget, buf);
 810           pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
 811
 812           x = widget->style->xthickness + 1 +
 813             (widget->allocation.width - 2 * widget->style->xthickness -
 814              3 - logical_rect.width)
 815             * progress->x_align;
 816
 817           y = widget->style->ythickness + 1 +
 818             (widget->allocation.height - 2 * widget->style->ythickness -
 819              3 - logical_rect.height)
 820             * progress->y_align;
 821
 822           rect.x = widget->style->xthickness + 1;
 823           rect.y = widget->style->ythickness + 1;
 824           rect.width = widget->allocation.width -
 825             2 * widget->style->xthickness - 3;
 826           rect.height = widget->allocation.height -
 827             2 * widget->style->ythickness - 3;
 828
 829           gtk_paint_layout (widget->style,
 830                             progress->offscreen_pixmap,
 831                             GTK_WIDGET_STATE (widget),
 832                             FALSE,
 833                             &rect,
 834                             widget,
 835                             "progressbar",
 836                             x, y,
 837                             layout);
 838
 839           g_object_unref (G_OBJECT (layout));
 840           g_free (buf);
 841         }
 842     }
 843 }
 844
 845 /*******************************************************************/
 846
 847 /**
 848  * gtk_progress_bar_set_fraction:
 849  * @pbar: a #GtkProgressBar
 850  * @fraction: fraction of the task that's been completed
 851  *
 852  * Causes the progress bar to "fill in" the given fraction
 853  * of the bar. The fraction should be between 0.0 and 1.0,
 854  * inclusive.
 855  *
 856  **/
 857 void
 858 gtk_progress_bar_set_fraction (GtkProgressBar *pbar,
 859                                gdouble         fraction)
 860 {
 861   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
 862
 863   /* If we know the percentage, we don't want activity mode. */
 864   gtk_progress_set_activity_mode (GTK_PROGRESS (pbar), FALSE);
 865
 866   /* We use the deprecated GtkProgress interface internally.
 867    * Once everything's been deprecated for a good long time,
 868    * we can clean up all this code.
 869    */
 870   gtk_progress_set_percentage (GTK_PROGRESS (pbar), fraction);
 871
 872   g_object_notify (G_OBJECT (pbar), "fraction");
 873 }
 874
 875 /**
 876  * gtk_progress_bar_pulse:
 877  * @pbar: a #GtkProgressBar
 878  *
 879  * Indicates that some progress is made, but you don't know how much.
 880  * Causes the progress bar to enter "activity mode," where a block
 881  * bounces back and forth. Each call to gtk_progress_bar_pulse()
 882  * causes the block to move by a little bit (the amount of movement
 883  * per pulse is determined by gtk_progress_bar_set_pulse_step()).
 884  **/
 885 void
 886 gtk_progress_bar_pulse (GtkProgressBar *pbar)
 887 {
 888   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
 889
 890   /* If we don't know the percentage, we must want activity mode. */
 891   gtk_progress_set_activity_mode (GTK_PROGRESS (pbar), TRUE);
 892
 893   /* Sigh. */
 894   gtk_progress_bar_real_update (GTK_PROGRESS (pbar));
 895 }
 896
 897 /**
 898  * gtk_progress_bar_set_text:
 899  * @pbar: a #GtkProgressBar
 900  * @text: a UTF-8 string
 901  *
 902  * Causes the given @text to appear superimposed on the progress bar.
 903  **/
 904 void
 905 gtk_progress_bar_set_text (GtkProgressBar *pbar,
 906                            const gchar    *text)
 907 {
 908   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
 909
 910   if (text && *text)
 911     {
 912       gtk_progress_set_show_text (GTK_PROGRESS (pbar), TRUE);
 913       gtk_progress_set_format_string (GTK_PROGRESS (pbar), text);
 914     }
 915   else
 916     {
 917       gtk_progress_set_show_text (GTK_PROGRESS (pbar), FALSE);
 918       gtk_progress_set_format_string (GTK_PROGRESS (pbar), "");
 919     }
 920
 921   /* We don't support formats in this interface */
 922   GTK_PROGRESS (pbar)->use_text_format = FALSE;
 923
 924   g_object_notify (G_OBJECT (pbar), "text");
 925 }
 926
 927 /**
 928  * gtk_progress_bar_set_pulse_step:
 929  * @pbar: a #GtkProgressBar
 930  * @fraction: fraction between 0.0 and 1.0
 931  *
 932  * Sets the fraction of total progress bar length to move the
 933  * bouncing block for each call to gtk_progress_bar_pulse().
 934  **/
 935 void
 936 gtk_progress_bar_set_pulse_step   (GtkProgressBar *pbar,
 937                                    gdouble         fraction)
 938 {
 939   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
 940
 941   pbar->pulse_fraction = fraction;
 942
 943   g_object_notify (G_OBJECT (pbar), "pulse_step");
 944 }
 945
 946 void
 947 gtk_progress_bar_update (GtkProgressBar *pbar,
 948                          gdouble         percentage)
 949 {
 950   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
 951
 952   /* Use of gtk_progress_bar_update() is deprecated !
 953    * Use gtk_progress_bar_set_percentage ()
 954    */
 955
 956   gtk_progress_set_percentage (GTK_PROGRESS (pbar), percentage);
 957 }
 958
 959 /**
 960  * gtk_progress_bar_set_orientation:
 961  * @pbar: a #GtkProgressBar
 962  * @orientation: orientation of the progress bar
 963  *
 964  * Causes the progress bar to switch to a different orientation
 965  * (left-to-right, right-to-left, top-to-bottom, or bottom-to-top).
 966  **/
 967 void
 968 gtk_progress_bar_set_orientation (GtkProgressBar           *pbar,
 969                                   GtkProgressBarOrientation orientation)
 970 {
 971   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
 972
 973   if (pbar->orientation != orientation)
 974     {
 975       pbar->orientation = orientation;
 976
 977       if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (pbar)))
 978         gtk_widget_queue_resize (GTK_WIDGET (pbar));
 979
 980       g_object_notify (G_OBJECT (pbar), "orientation");
 981     }
 982 }
 983
 984 /**
 985  * gtk_progress_bar_get_text:
 986  * @pbar: a #GtkProgressBar
 987  *
 988  * Retrieves the text displayed superimposed on the progress bar,
 989  * if any, otherwise %NULL. The return value is a reference
 990  * to the text, not a copy of it, so will become invalid
 991  * if you change the text in the progress bar.
 992  *
 993  * Return value: text, or %NULL; don't free the string
 994  **/
 995 G_CONST_RETURN gchar*
 996 gtk_progress_bar_get_text (GtkProgressBar *pbar)
 997 {
 998   g_return_val_if_fail (GTK_IS_PROGRESS_BAR (pbar), NULL);
 999
1000   if (GTK_PROGRESS (pbar)->use_text_format)
1001     return NULL;
1002   else
1003     return GTK_PROGRESS (pbar)->format;
1004 }
1005
1006 /**
1007  * gtk_progress_bar_get_fraction:
1008  * @pbar: a #GtkProgressBar
1009  *
1010  * Returns the current fraction of the task that's been completed.
1011  *
1012  * Return value: a fraction from 0.0 to 1.0
1013  **/
1014 gdouble
1015 gtk_progress_bar_get_fraction (GtkProgressBar *pbar)
1016 {
1017   g_return_val_if_fail (GTK_IS_PROGRESS_BAR (pbar), 0);
1018
1019   return gtk_progress_get_current_percentage (GTK_PROGRESS (pbar));
1020 }
1021
1022 /**
1023  * gtk_progress_bar_get_pulse_step:
1024  * @pbar: a #GtkProgressBar
1025  *
1026  * Retrieves the pulse step set with gtk_progress_bar_set_pulse_step()
1027  *
1028  * Return value: a fraction from 0.0 to 1.0
1029  **/
1030 gdouble
1031 gtk_progress_bar_get_pulse_step (GtkProgressBar *pbar)
1032 {
1033   g_return_val_if_fail (GTK_IS_PROGRESS_BAR (pbar), 0);
1034
1035   return pbar->pulse_fraction;
1036 }
1037
1038 /**
1039  * gtk_progress_bar_get_orientation:
1040  * @pbar: a #GtkProgressBar
1041  *
1042  * Retrieves the current progress bar orientation.
1043  *
1044  * Return value: orientation of the progress bar
1045  **/
1046 GtkProgressBarOrientation
1047 gtk_progress_bar_get_orientation (GtkProgressBar *pbar)
1048 {
1049   g_return_val_if_fail (GTK_IS_PROGRESS_BAR (pbar), 0);
1050
1051   return pbar->orientation;
1052 }
1053
1054 void
1055 gtk_progress_bar_set_bar_style (GtkProgressBar     *pbar,
1056                                 GtkProgressBarStyle bar_style)
1057 {
1058   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
1059
1060   if (pbar->bar_style != bar_style)
1061     {
1062       pbar->bar_style = bar_style;
1063
1064       if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (pbar)))
1065         gtk_widget_queue_resize (GTK_WIDGET (pbar));
1066
1067       g_object_notify (G_OBJECT (pbar), "bar_style");
1068     }
1069 }
1070
1071 void
1072 gtk_progress_bar_set_discrete_blocks (GtkProgressBar *pbar,
1073                                       guint           blocks)
1074 {
1075   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
1076   g_return_if_fail (blocks > 1);
1077
1078   if (pbar->blocks != blocks)
1079     {
1080       pbar->blocks = blocks;
1081
1082       if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (pbar)))
1083         gtk_widget_queue_resize (GTK_WIDGET (pbar));
1084
1085       g_object_notify (G_OBJECT (pbar), "discrete_blocks");
1086     }
1087 }
1088
1089 void
1090 gtk_progress_bar_set_activity_step (GtkProgressBar *pbar,
1091                                     guint           step)
1092 {
1093   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
1094
1095   if (pbar->activity_step != step)
1096     {
1097       pbar->activity_step = step;
1098       g_object_notify (G_OBJECT (pbar), "activity_step");
1099     }
1100 }
1101
1102 void
1103 gtk_progress_bar_set_activity_blocks (GtkProgressBar *pbar,
1104                                       guint           blocks)
1105 {
1106   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
1107   g_return_if_fail (blocks > 1);
1108
1109   if (pbar->activity_blocks != blocks)
1110     {
1111       pbar->activity_blocks = blocks;
1112       g_object_notify (G_OBJECT (pbar), "activity_blocks");
1113     }
1114 }