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

   1 /* gtkcellrenderertext.c
   2  * Copyright (C) 2000  Red Hat, Inc.,  Jonathan Blandford <jrb@redhat.com>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library 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  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library 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 #include <stdlib.h>
  21 #include "gtkcellrenderertext.h"
  22 #include "gtkeditable.h"
  23 #include "gtkentry.h"
  24 #include "gtkmarshalers.h"
  25 #include "gtkintl.h"
  26
  27 static void gtk_cell_renderer_text_init       (GtkCellRendererText      *celltext);
  28 static void gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class);
  29 static void gtk_cell_renderer_text_finalize   (GObject                  *object);
  30
  31 static void gtk_cell_renderer_text_get_property  (GObject                  *object,
  32                                                   guint                     param_id,
  33                                                   GValue                   *value,
  34                                                   GParamSpec               *pspec);
  35 static void gtk_cell_renderer_text_set_property  (GObject                  *object,
  36                                                   guint                     param_id,
  37                                                   const GValue             *value,
  38                                                   GParamSpec               *pspec);
  39 static void gtk_cell_renderer_text_get_size   (GtkCellRenderer          *cell,
  40                                                GtkWidget                *widget,
  41                                                GdkRectangle             *cell_area,
  42                                                gint                     *x_offset,
  43                                                gint                     *y_offset,
  44                                                gint                     *width,
  45                                                gint                     *height);
  46 static void gtk_cell_renderer_text_render     (GtkCellRenderer          *cell,
  47                                                GdkWindow                *window,
  48                                                GtkWidget                *widget,
  49                                                GdkRectangle             *background_area,
  50                                                GdkRectangle             *cell_area,
  51                                                GdkRectangle             *expose_area,
  52                                                GtkCellRendererState      flags);
  53
  54 static GtkCellEditable *gtk_cell_renderer_text_start_editing (GtkCellRenderer      *cell,
  55                                                               GdkEvent             *event,
  56                                                               GtkWidget            *widget,
  57                                                               const gchar          *path,
  58                                                               GdkRectangle         *background_area,
  59                                                               GdkRectangle         *cell_area,
  60                                                               GtkCellRendererState  flags);
  61
  62 enum {
  63   EDITED,
  64   LAST_SIGNAL
  65 };
  66
  67 enum {
  68   PROP_0,
  69
  70   PROP_TEXT,
  71   PROP_MARKUP,
  72   PROP_ATTRIBUTES,
  73
  74   /* Style args */
  75   PROP_BACKGROUND,
  76   PROP_FOREGROUND,
  77   PROP_BACKGROUND_GDK,
  78   PROP_FOREGROUND_GDK,
  79   PROP_FONT,
  80   PROP_FONT_DESC,
  81   PROP_FAMILY,
  82   PROP_STYLE,
  83   PROP_VARIANT,
  84   PROP_WEIGHT,
  85   PROP_STRETCH,
  86   PROP_SIZE,
  87   PROP_SIZE_POINTS,
  88   PROP_SCALE,
  89   PROP_EDITABLE,
  90   PROP_STRIKETHROUGH,
  91   PROP_UNDERLINE,
  92   PROP_RISE,
  93
  94   /* Whether-a-style-arg-is-set args */
  95   PROP_BACKGROUND_SET,
  96   PROP_FOREGROUND_SET,
  97   PROP_FAMILY_SET,
  98   PROP_STYLE_SET,
  99   PROP_VARIANT_SET,
 100   PROP_WEIGHT_SET,
 101   PROP_STRETCH_SET,
 102   PROP_SIZE_SET,
 103   PROP_SCALE_SET,
 104   PROP_EDITABLE_SET,
 105   PROP_STRIKETHROUGH_SET,
 106   PROP_UNDERLINE_SET,
 107   PROP_RISE_SET
 108 };
 109
 110 static gpointer parent_class;
 111 static guint text_cell_renderer_signals [LAST_SIGNAL];
 112
 113 #define GTK_CELL_RENDERER_TEXT_PATH "gtk-cell-renderer-text-path"
 114
 115 GType
 116 gtk_cell_renderer_text_get_type (void)
 117 {
 118   static GType cell_text_type = 0;
 119
 120   if (!cell_text_type)
 121     {
 122       static const GTypeInfo cell_text_info =
 123       {
 124         sizeof (GtkCellRendererTextClass),
 125         NULL,           /* base_init */
 126         NULL,           /* base_finalize */
 127         (GClassInitFunc) gtk_cell_renderer_text_class_init,
 128         NULL,           /* class_finalize */
 129         NULL,           /* class_data */
 130         sizeof (GtkCellRendererText),
 131         0,              /* n_preallocs */
 132         (GInstanceInitFunc) gtk_cell_renderer_text_init,
 133       };
 134
 135       cell_text_type =
 136         g_type_register_static (GTK_TYPE_CELL_RENDERER, "GtkCellRendererText",
 137                                 &cell_text_info, 0);
 138     }
 139
 140   return cell_text_type;
 141 }
 142
 143 static void
 144 gtk_cell_renderer_text_init (GtkCellRendererText *celltext)
 145 {
 146   GTK_CELL_RENDERER (celltext)->xalign = 0.0;
 147   GTK_CELL_RENDERER (celltext)->yalign = 0.5;
 148   GTK_CELL_RENDERER (celltext)->xpad = 2;
 149   GTK_CELL_RENDERER (celltext)->ypad = 2;
 150   celltext->fixed_height_rows = -1;
 151   celltext->font = pango_font_description_new ();
 152 }
 153
 154 static void
 155 gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class)
 156 {
 157   GObjectClass *object_class = G_OBJECT_CLASS (class);
 158   GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
 159
 160   parent_class = g_type_class_peek_parent (class);
 161
 162   object_class->finalize = gtk_cell_renderer_text_finalize;
 163
 164   object_class->get_property = gtk_cell_renderer_text_get_property;
 165   object_class->set_property = gtk_cell_renderer_text_set_property;
 166
 167   cell_class->get_size = gtk_cell_renderer_text_get_size;
 168   cell_class->render = gtk_cell_renderer_text_render;
 169   cell_class->start_editing = gtk_cell_renderer_text_start_editing;
 170
 171   g_object_class_install_property (object_class,
 172                                    PROP_TEXT,
 173                                    g_param_spec_string ("text",
 174                                                         _("Text"),
 175                                                         _("Text to render"),
 176                                                         NULL,
 177                                                         G_PARAM_READWRITE));
 178
 179   g_object_class_install_property (object_class,
 180                                    PROP_MARKUP,
 181                                    g_param_spec_string ("markup",
 182                                                         _("Markup"),
 183                                                         _("Marked up text to render"),
 184                                                         NULL,
 185                                                         G_PARAM_WRITABLE));
 186
 187   g_object_class_install_property (object_class,
 188                                    PROP_ATTRIBUTES,
 189                                    g_param_spec_boxed ("attributes",
 190                                                        _("Attributes"),
 191                                                        _("A list of style attributes to apply to the text of the renderer"),
 192                                                        PANGO_TYPE_ATTR_LIST,
 193                                                        G_PARAM_READWRITE));
 194
 195   g_object_class_install_property (object_class,
 196                                    PROP_BACKGROUND,
 197                                    g_param_spec_string ("background",
 198                                                         _("Background color name"),
 199                                                         _("Background color as a string"),
 200                                                         NULL,
 201                                                         G_PARAM_WRITABLE));
 202
 203   g_object_class_install_property (object_class,
 204                                    PROP_BACKGROUND_GDK,
 205                                    g_param_spec_boxed ("background_gdk",
 206                                                        _("Background color"),
 207                                                        _("Background color as a GdkColor"),
 208                                                        GDK_TYPE_COLOR,
 209                                                        G_PARAM_READABLE | G_PARAM_WRITABLE));
 210
 211   g_object_class_install_property (object_class,
 212                                    PROP_FOREGROUND,
 213                                    g_param_spec_string ("foreground",
 214                                                         _("Foreground color name"),
 215                                                         _("Foreground color as a string"),
 216                                                         NULL,
 217                                                         G_PARAM_WRITABLE));
 218
 219   g_object_class_install_property (object_class,
 220                                    PROP_FOREGROUND_GDK,
 221                                    g_param_spec_boxed ("foreground_gdk",
 222                                                        _("Foreground color"),
 223                                                        _("Foreground color as a GdkColor"),
 224                                                        GDK_TYPE_COLOR,
 225                                                        G_PARAM_READABLE | G_PARAM_WRITABLE));
 226
 227
 228   g_object_class_install_property (object_class,
 229                                    PROP_EDITABLE,
 230                                    g_param_spec_boolean ("editable",
 231                                                          _("Editable"),
 232                                                          _("Whether the text can be modified by the user"),
 233                                                          FALSE,
 234                                                          G_PARAM_READABLE | G_PARAM_WRITABLE));
 235
 236   g_object_class_install_property (object_class,
 237                                    PROP_FONT,
 238                                    g_param_spec_string ("font",
 239                                                         _("Font"),
 240                                                         _("Font description as a string"),
 241                                                         NULL,
 242                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 243
 244   g_object_class_install_property (object_class,
 245                                    PROP_FONT_DESC,
 246                                    g_param_spec_boxed ("font_desc",
 247                                                        _("Font"),
 248                                                        _("Font description as a PangoFontDescription struct"),
 249                                                        PANGO_TYPE_FONT_DESCRIPTION,
 250                                                        G_PARAM_READABLE | G_PARAM_WRITABLE));
 251
 252
 253   g_object_class_install_property (object_class,
 254                                    PROP_FAMILY,
 255                                    g_param_spec_string ("family",
 256                                                         _("Font family"),
 257                                                         _("Name of the font family, e.g. Sans, Helvetica, Times, Monospace"),
 258                                                         NULL,
 259                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 260
 261   g_object_class_install_property (object_class,
 262                                    PROP_STYLE,
 263                                    g_param_spec_enum ("style",
 264                                                       _("Font style"),
 265                                                       _("Font style"),
 266                                                       PANGO_TYPE_STYLE,
 267                                                       PANGO_STYLE_NORMAL,
 268                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 269
 270   g_object_class_install_property (object_class,
 271                                    PROP_VARIANT,
 272                                    g_param_spec_enum ("variant",
 273                                                      _("Font variant"),
 274                                                      _("Font variant"),
 275                                                       PANGO_TYPE_VARIANT,
 276                                                       PANGO_VARIANT_NORMAL,
 277                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 278
 279   g_object_class_install_property (object_class,
 280                                    PROP_WEIGHT,
 281                                    g_param_spec_int ("weight",
 282                                                      _("Font weight"),
 283                                                      _("Font weight"),
 284                                                      0,
 285                                                      G_MAXINT,
 286                                                      PANGO_WEIGHT_NORMAL,
 287                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 288
 289    g_object_class_install_property (object_class,
 290                                    PROP_STRETCH,
 291                                    g_param_spec_enum ("stretch",
 292                                                       _("Font stretch"),
 293                                                       _("Font stretch"),
 294                                                       PANGO_TYPE_STRETCH,
 295                                                       PANGO_STRETCH_NORMAL,
 296                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 297
 298   g_object_class_install_property (object_class,
 299                                    PROP_SIZE,
 300                                    g_param_spec_int ("size",
 301                                                      _("Font size"),
 302                                                      _("Font size"),
 303                                                      0,
 304                                                      G_MAXINT,
 305                                                      0,
 306                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 307
 308   g_object_class_install_property (object_class,
 309                                    PROP_SIZE_POINTS,
 310                                    g_param_spec_double ("size_points",
 311                                                         _("Font points"),
 312                                                         _("Font size in points"),
 313                                                         0.0,
 314                                                         G_MAXDOUBLE,
 315                                                         0.0,
 316                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 317
 318   g_object_class_install_property (object_class,
 319                                    PROP_SCALE,
 320                                    g_param_spec_double ("scale",
 321                                                         _("Font scale"),
 322                                                         _("Font scaling factor"),
 323                                                         0.0,
 324                                                         G_MAXDOUBLE,
 325                                                         1.0,
 326                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 327
 328   g_object_class_install_property (object_class,
 329                                    PROP_RISE,
 330                                    g_param_spec_int ("rise",
 331                                                      _("Rise"),
 332                                                      _("Offset of text above the baseline (below the baseline if rise is negative)"),
 333                                                      -G_MAXINT,
 334                                                      G_MAXINT,
 335                                                      0,
 336                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 337
 338
 339   g_object_class_install_property (object_class,
 340                                    PROP_STRIKETHROUGH,
 341                                    g_param_spec_boolean ("strikethrough",
 342                                                          _("Strikethrough"),
 343                                                          _("Whether to strike through the text"),
 344                                                          FALSE,
 345                                                          G_PARAM_READABLE | G_PARAM_WRITABLE));
 346
 347   g_object_class_install_property (object_class,
 348                                    PROP_UNDERLINE,
 349                                    g_param_spec_enum ("underline",
 350                                                       _("Underline"),
 351                                                       _("Style of underline for this text"),
 352                                                       PANGO_TYPE_UNDERLINE,
 353                                                       PANGO_UNDERLINE_NONE,
 354                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 355
 356   /* Style props are set or not */
 357
 358 #define ADD_SET_PROP(propname, propval, nick, blurb) g_object_class_install_property (object_class, propval, g_param_spec_boolean (propname, nick, blurb, FALSE, G_PARAM_READABLE | G_PARAM_WRITABLE))
 359
 360   ADD_SET_PROP ("background_set", PROP_BACKGROUND_SET,
 361                 _("Background set"),
 362                 _("Whether this tag affects the background color"));
 363
 364   ADD_SET_PROP ("foreground_set", PROP_FOREGROUND_SET,
 365                 _("Foreground set"),
 366                 _("Whether this tag affects the foreground color"));
 367
 368   ADD_SET_PROP ("editable_set", PROP_EDITABLE_SET,
 369                 _("Editability set"),
 370                 _("Whether this tag affects text editability"));
 371
 372   ADD_SET_PROP ("family_set", PROP_FAMILY_SET,
 373                 _("Font family set"),
 374                 _("Whether this tag affects the font family"));
 375
 376   ADD_SET_PROP ("style_set", PROP_STYLE_SET,
 377                 _("Font style set"),
 378                 _("Whether this tag affects the font style"));
 379
 380   ADD_SET_PROP ("variant_set", PROP_VARIANT_SET,
 381                 _("Font variant set"),
 382                 _("Whether this tag affects the font variant"));
 383
 384   ADD_SET_PROP ("weight_set", PROP_WEIGHT_SET,
 385                 _("Font weight set"),
 386                 _("Whether this tag affects the font weight"));
 387
 388   ADD_SET_PROP ("stretch_set", PROP_STRETCH_SET,
 389                 _("Font stretch set"),
 390                 _("Whether this tag affects the font stretch"));
 391
 392   ADD_SET_PROP ("size_set", PROP_SIZE_SET,
 393                 _("Font size set"),
 394                 _("Whether this tag affects the font size"));
 395
 396   ADD_SET_PROP ("scale_set", PROP_SCALE_SET,
 397                 _("Font scale set"),
 398                 _("Whether this tag scales the font size by a factor"));
 399
 400   ADD_SET_PROP ("rise_set", PROP_RISE_SET,
 401                 _("Rise set"),
 402                 _("Whether this tag affects the rise"));
 403
 404   ADD_SET_PROP ("strikethrough_set", PROP_STRIKETHROUGH_SET,
 405                 _("Strikethrough set"),
 406                 _("Whether this tag affects strikethrough"));
 407
 408   ADD_SET_PROP ("underline_set", PROP_UNDERLINE_SET,
 409                 _("Underline set"),
 410                 _("Whether this tag affects underlining"));
 411
 412   text_cell_renderer_signals [EDITED] =
 413     g_signal_new ("edited",
 414                   G_OBJECT_CLASS_TYPE (object_class),
 415                   G_SIGNAL_RUN_LAST,
 416                   G_STRUCT_OFFSET (GtkCellRendererTextClass, edited),
 417                   NULL, NULL,
 418                   _gtk_marshal_VOID__STRING_STRING,
 419                   G_TYPE_NONE, 2,
 420                   G_TYPE_STRING,
 421                   G_TYPE_STRING);
 422
 423 }
 424
 425 static void
 426 gtk_cell_renderer_text_finalize (GObject *object)
 427 {
 428   GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
 429
 430   pango_font_description_free (celltext->font);
 431
 432   if (celltext->text)
 433     g_free (celltext->text);
 434
 435   if (celltext->extra_attrs)
 436     pango_attr_list_unref (celltext->extra_attrs);
 437
 438   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
 439 }
 440
 441 static PangoFontMask
 442 get_property_font_set_mask (guint prop_id)
 443 {
 444   switch (prop_id)
 445     {
 446     case PROP_FAMILY_SET:
 447       return PANGO_FONT_MASK_FAMILY;
 448     case PROP_STYLE_SET:
 449       return PANGO_FONT_MASK_STYLE;
 450     case PROP_VARIANT_SET:
 451       return PANGO_FONT_MASK_VARIANT;
 452     case PROP_WEIGHT_SET:
 453       return PANGO_FONT_MASK_WEIGHT;
 454     case PROP_STRETCH_SET:
 455       return PANGO_FONT_MASK_STRETCH;
 456     case PROP_SIZE_SET:
 457       return PANGO_FONT_MASK_SIZE;
 458     }
 459
 460   return 0;
 461 }
 462
 463 static void
 464 gtk_cell_renderer_text_get_property (GObject        *object,
 465                                      guint           param_id,
 466                                      GValue         *value,
 467                                      GParamSpec     *pspec)
 468 {
 469   GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
 470
 471   switch (param_id)
 472     {
 473     case PROP_TEXT:
 474       g_value_set_string (value, celltext->text);
 475       break;
 476
 477     case PROP_ATTRIBUTES:
 478       g_value_set_boxed (value, celltext->extra_attrs);
 479       break;
 480
 481     case PROP_BACKGROUND_GDK:
 482       {
 483         GdkColor color;
 484
 485         color.red = celltext->background.red;
 486         color.green = celltext->background.green;
 487         color.blue = celltext->background.blue;
 488
 489         g_value_set_boxed (value, &color);
 490       }
 491       break;
 492
 493     case PROP_FOREGROUND_GDK:
 494       {
 495         GdkColor color;
 496
 497         color.red = celltext->foreground.red;
 498         color.green = celltext->foreground.green;
 499         color.blue = celltext->foreground.blue;
 500
 501         g_value_set_boxed (value, &color);
 502       }
 503       break;
 504
 505     case PROP_FONT:
 506       {
 507         /* FIXME GValue imposes a totally gratuitous string copy
 508          * here, we could just hand off string ownership
 509          */
 510         gchar *str = pango_font_description_to_string (celltext->font);
 511         g_value_set_string (value, str);
 512         g_free (str);
 513       }
 514       break;
 515
 516     case PROP_FONT_DESC:
 517       g_value_set_boxed (value, celltext->font);
 518       break;
 519
 520     case PROP_FAMILY:
 521       g_value_set_string (value, pango_font_description_get_family (celltext->font));
 522       break;
 523
 524     case PROP_STYLE:
 525       g_value_set_enum (value, pango_font_description_get_style (celltext->font));
 526       break;
 527
 528     case PROP_VARIANT:
 529       g_value_set_enum (value, pango_font_description_get_variant (celltext->font));
 530       break;
 531
 532     case PROP_WEIGHT:
 533       g_value_set_int (value, pango_font_description_get_weight (celltext->font));
 534       break;
 535
 536     case PROP_STRETCH:
 537       g_value_set_enum (value, pango_font_description_get_stretch (celltext->font));
 538       break;
 539
 540     case PROP_SIZE:
 541       g_value_set_int (value, pango_font_description_get_size (celltext->font));
 542       break;
 543
 544     case PROP_SIZE_POINTS:
 545       g_value_set_double (value, ((double)pango_font_description_get_size (celltext->font)) / (double)PANGO_SCALE);
 546       break;
 547
 548     case PROP_SCALE:
 549       g_value_set_double (value, celltext->font_scale);
 550       break;
 551
 552     case PROP_EDITABLE:
 553       g_value_set_boolean (value, celltext->editable);
 554       break;
 555
 556     case PROP_STRIKETHROUGH:
 557       g_value_set_boolean (value, celltext->strikethrough);
 558       break;
 559
 560     case PROP_UNDERLINE:
 561       g_value_set_enum (value, celltext->underline_style);
 562       break;
 563
 564     case PROP_RISE:
 565       g_value_set_int (value, celltext->rise);
 566       break;
 567
 568     case PROP_BACKGROUND_SET:
 569       g_value_set_boolean (value, celltext->background_set);
 570       break;
 571
 572     case PROP_FOREGROUND_SET:
 573       g_value_set_boolean (value, celltext->foreground_set);
 574       break;
 575
 576     case PROP_FAMILY_SET:
 577     case PROP_STYLE_SET:
 578     case PROP_VARIANT_SET:
 579     case PROP_WEIGHT_SET:
 580     case PROP_STRETCH_SET:
 581     case PROP_SIZE_SET:
 582       {
 583         PangoFontMask mask = get_property_font_set_mask (param_id);
 584         g_value_set_boolean (value, (pango_font_description_get_set_fields (celltext->font) & mask) != 0);
 585
 586         break;
 587       }
 588
 589     case PROP_SCALE_SET:
 590       g_value_set_boolean (value, celltext->scale_set);
 591       break;
 592
 593     case PROP_EDITABLE_SET:
 594       g_value_set_boolean (value, celltext->editable_set);
 595       break;
 596
 597     case PROP_STRIKETHROUGH_SET:
 598       g_value_set_boolean (value, celltext->strikethrough_set);
 599       break;
 600
 601     case PROP_UNDERLINE_SET:
 602       g_value_set_boolean (value, celltext->underline_set);
 603       break;
 604
 605     case  PROP_RISE_SET:
 606       g_value_set_boolean (value, celltext->rise_set);
 607       break;
 608
 609     case PROP_BACKGROUND:
 610     case PROP_FOREGROUND:
 611     case PROP_MARKUP:
 612     default:
 613       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 614       break;
 615     }
 616 }
 617
 618
 619 static void
 620 set_bg_color (GtkCellRendererText *celltext,
 621               GdkColor            *color)
 622 {
 623   if (color)
 624     {
 625       if (!celltext->background_set)
 626         {
 627           celltext->background_set = TRUE;
 628           g_object_notify (G_OBJECT (celltext), "background_set");
 629         }
 630
 631       celltext->background.red = color->red;
 632       celltext->background.green = color->green;
 633       celltext->background.blue = color->blue;
 634     }
 635   else
 636     {
 637       if (celltext->background_set)
 638         {
 639           celltext->background_set = FALSE;
 640           g_object_notify (G_OBJECT (celltext), "background_set");
 641         }
 642     }
 643 }
 644
 645
 646 static void
 647 set_fg_color (GtkCellRendererText *celltext,
 648               GdkColor            *color)
 649 {
 650   if (color)
 651     {
 652       if (!celltext->foreground_set)
 653         {
 654           celltext->foreground_set = TRUE;
 655           g_object_notify (G_OBJECT (celltext), "foreground_set");
 656         }
 657
 658       celltext->foreground.red = color->red;
 659       celltext->foreground.green = color->green;
 660       celltext->foreground.blue = color->blue;
 661     }
 662   else
 663     {
 664       if (celltext->foreground_set)
 665         {
 666           celltext->foreground_set = FALSE;
 667           g_object_notify (G_OBJECT (celltext), "foreground_set");
 668         }
 669     }
 670 }
 671
 672 static PangoFontMask
 673 set_font_desc_fields (PangoFontDescription *desc,
 674                       PangoFontMask         to_set)
 675 {
 676   PangoFontMask changed_mask = 0;
 677
 678   if (to_set & PANGO_FONT_MASK_FAMILY)
 679     {
 680       const char *family = pango_font_description_get_family (desc);
 681       if (!family)
 682         {
 683           family = "sans";
 684           changed_mask |= PANGO_FONT_MASK_FAMILY;
 685         }
 686
 687       pango_font_description_set_family (desc, family);
 688     }
 689   if (to_set & PANGO_FONT_MASK_STYLE)
 690     pango_font_description_set_style (desc, pango_font_description_get_style (desc));
 691   if (to_set & PANGO_FONT_MASK_VARIANT)
 692     pango_font_description_set_variant (desc, pango_font_description_get_variant (desc));
 693   if (to_set & PANGO_FONT_MASK_WEIGHT)
 694     pango_font_description_set_weight (desc, pango_font_description_get_weight (desc));
 695   if (to_set & PANGO_FONT_MASK_STRETCH)
 696     pango_font_description_set_stretch (desc, pango_font_description_get_stretch (desc));
 697   if (to_set & PANGO_FONT_MASK_SIZE)
 698     {
 699       gint size = pango_font_description_get_size (desc);
 700       if (size <= 0)
 701         {
 702           size = 10 * PANGO_SCALE;
 703           changed_mask |= PANGO_FONT_MASK_SIZE;
 704         }
 705
 706       pango_font_description_set_size (desc, size);
 707     }
 708
 709   return changed_mask;
 710 }
 711
 712 static void
 713 notify_set_changed (GObject       *object,
 714                     PangoFontMask  changed_mask)
 715 {
 716   if (changed_mask & PANGO_FONT_MASK_FAMILY)
 717     g_object_notify (object, "family_set");
 718   if (changed_mask & PANGO_FONT_MASK_STYLE)
 719     g_object_notify (object, "style_set");
 720   if (changed_mask & PANGO_FONT_MASK_VARIANT)
 721     g_object_notify (object, "variant_set");
 722   if (changed_mask & PANGO_FONT_MASK_WEIGHT)
 723     g_object_notify (object, "weight_set");
 724   if (changed_mask & PANGO_FONT_MASK_STRETCH)
 725     g_object_notify (object, "stretch_set");
 726   if (changed_mask & PANGO_FONT_MASK_SIZE)
 727     g_object_notify (object, "size_set");
 728 }
 729
 730 static void
 731 notify_fields_changed (GObject       *object,
 732                        PangoFontMask  changed_mask)
 733 {
 734   if (changed_mask & PANGO_FONT_MASK_FAMILY)
 735     g_object_notify (object, "family");
 736   if (changed_mask & PANGO_FONT_MASK_STYLE)
 737     g_object_notify (object, "style");
 738   if (changed_mask & PANGO_FONT_MASK_VARIANT)
 739     g_object_notify (object, "variant");
 740   if (changed_mask & PANGO_FONT_MASK_WEIGHT)
 741     g_object_notify (object, "weight");
 742   if (changed_mask & PANGO_FONT_MASK_STRETCH)
 743     g_object_notify (object, "stretch");
 744   if (changed_mask & PANGO_FONT_MASK_SIZE)
 745     g_object_notify (object, "size");
 746 }
 747
 748 static void
 749 set_font_description (GtkCellRendererText  *celltext,
 750                       PangoFontDescription *font_desc)
 751 {
 752   GObject *object = G_OBJECT (celltext);
 753   PangoFontDescription *new_font_desc;
 754   PangoFontMask old_mask, new_mask, changed_mask, set_changed_mask;
 755
 756   if (font_desc)
 757     new_font_desc = pango_font_description_copy (font_desc);
 758   else
 759     new_font_desc = pango_font_description_new ();
 760
 761   old_mask = pango_font_description_get_set_fields (celltext->font);
 762   new_mask = pango_font_description_get_set_fields (new_font_desc);
 763
 764   changed_mask = old_mask | new_mask;
 765   set_changed_mask = old_mask ^ new_mask;
 766
 767   pango_font_description_free (celltext->font);
 768   celltext->font = new_font_desc;
 769
 770   g_object_freeze_notify (object);
 771
 772   g_object_notify (object, "font_desc");
 773   g_object_notify (object, "font");
 774
 775   if (changed_mask & PANGO_FONT_MASK_FAMILY)
 776     g_object_notify (object, "family");
 777   if (changed_mask & PANGO_FONT_MASK_STYLE)
 778     g_object_notify (object, "style");
 779   if (changed_mask & PANGO_FONT_MASK_VARIANT)
 780     g_object_notify (object, "variant");
 781   if (changed_mask & PANGO_FONT_MASK_WEIGHT)
 782     g_object_notify (object, "weight");
 783   if (changed_mask & PANGO_FONT_MASK_STRETCH)
 784     g_object_notify (object, "stretch");
 785   if (changed_mask & PANGO_FONT_MASK_SIZE)
 786     {
 787       g_object_notify (object, "size");
 788       g_object_notify (object, "size_points");
 789     }
 790
 791   notify_set_changed (object, set_changed_mask);
 792
 793   g_object_thaw_notify (object);
 794 }
 795
 796 static void
 797 gtk_cell_renderer_text_set_property (GObject      *object,
 798                                      guint         param_id,
 799                                      const GValue *value,
 800                                      GParamSpec   *pspec)
 801 {
 802   GtkCellRendererText *celltext = GTK_CELL_RENDERER_TEXT (object);
 803
 804   switch (param_id)
 805     {
 806     case PROP_TEXT:
 807       if (celltext->text)
 808         g_free (celltext->text);
 809       celltext->text = g_strdup (g_value_get_string (value));
 810       g_object_notify (object, "text");
 811       break;
 812
 813     case PROP_ATTRIBUTES:
 814       if (celltext->extra_attrs)
 815         pango_attr_list_unref (celltext->extra_attrs);
 816
 817       celltext->extra_attrs = g_value_get_boxed (value);
 818       if (celltext->extra_attrs)
 819         pango_attr_list_ref (celltext->extra_attrs);
 820       break;
 821     case PROP_MARKUP:
 822       {
 823         const gchar *str;
 824         gchar *text = NULL;
 825         GError *error = NULL;
 826         PangoAttrList *attrs = NULL;
 827
 828         if (celltext->text)
 829           g_free (celltext->text);
 830
 831         if (celltext->extra_attrs)
 832           pango_attr_list_unref (celltext->extra_attrs);
 833
 834         str = g_value_get_string (value);
 835         if (str && !pango_parse_markup (str,
 836                                         -1,
 837                                         0,
 838                                         &attrs,
 839                                         &text,
 840                                         NULL,
 841                                         &error))
 842           {
 843             g_warning ("Failed to set cell text from markup due to error parsing markup: %s",
 844                        error->message);
 845             g_error_free (error);
 846             return;
 847           }
 848
 849         celltext->text = text;
 850         celltext->extra_attrs = attrs;
 851       }
 852       break;
 853
 854     case PROP_BACKGROUND:
 855       {
 856         GdkColor color;
 857
 858         if (!g_value_get_string (value))
 859           set_bg_color (celltext, NULL);       /* reset to backgrounmd_set to FALSE */
 860         else if (gdk_color_parse (g_value_get_string (value), &color))
 861           set_bg_color (celltext, &color);
 862         else
 863           g_warning ("Don't know color `%s'", g_value_get_string (value));
 864
 865         g_object_notify (object, "background_gdk");
 866       }
 867       break;
 868
 869     case PROP_FOREGROUND:
 870       {
 871         GdkColor color;
 872
 873         if (!g_value_get_string (value))
 874           set_fg_color (celltext, NULL);       /* reset to foreground_set to FALSE */
 875         else if (gdk_color_parse (g_value_get_string (value), &color))
 876           set_fg_color (celltext, &color);
 877         else
 878           g_warning ("Don't know color `%s'", g_value_get_string (value));
 879
 880         g_object_notify (object, "foreground_gdk");
 881       }
 882       break;
 883
 884     case PROP_BACKGROUND_GDK:
 885       /* This notifies the GObject itself. */
 886       set_bg_color (celltext, g_value_get_boxed (value));
 887       break;
 888
 889     case PROP_FOREGROUND_GDK:
 890       /* This notifies the GObject itself. */
 891       set_fg_color (celltext, g_value_get_boxed (value));
 892       break;
 893
 894     case PROP_FONT:
 895       {
 896         PangoFontDescription *font_desc = NULL;
 897         const gchar *name;
 898
 899         name = g_value_get_string (value);
 900
 901         if (name)
 902           font_desc = pango_font_description_from_string (name);
 903
 904         set_font_description (celltext, font_desc);
 905
 906         if (celltext->fixed_height_rows != -1)
 907           celltext->calc_fixed_height = TRUE;
 908       }
 909       break;
 910
 911     case PROP_FONT_DESC:
 912       set_font_description (celltext, g_value_get_boxed (value));
 913
 914       if (celltext->fixed_height_rows != -1)
 915         celltext->calc_fixed_height = TRUE;
 916       break;
 917
 918     case PROP_FAMILY:
 919     case PROP_STYLE:
 920     case PROP_VARIANT:
 921     case PROP_WEIGHT:
 922     case PROP_STRETCH:
 923     case PROP_SIZE:
 924     case PROP_SIZE_POINTS:
 925       {
 926         PangoFontMask old_set_mask = pango_font_description_get_set_fields (celltext->font);
 927
 928         switch (param_id)
 929           {
 930           case PROP_FAMILY:
 931             pango_font_description_set_family (celltext->font,
 932                                                g_value_get_string (value));
 933             break;
 934           case PROP_STYLE:
 935             pango_font_description_set_style (celltext->font,
 936                                               g_value_get_enum (value));
 937             break;
 938           case PROP_VARIANT:
 939             pango_font_description_set_variant (celltext->font,
 940                                                 g_value_get_enum (value));
 941             break;
 942           case PROP_WEIGHT:
 943             pango_font_description_set_weight (celltext->font,
 944                                                g_value_get_int (value));
 945             break;
 946           case PROP_STRETCH:
 947             pango_font_description_set_stretch (celltext->font,
 948                                                 g_value_get_enum (value));
 949             break;
 950           case PROP_SIZE:
 951             pango_font_description_set_size (celltext->font,
 952                                              g_value_get_int (value));
 953             g_object_notify (object, "size_points");
 954             break;
 955           case PROP_SIZE_POINTS:
 956             pango_font_description_set_size (celltext->font,
 957                                              g_value_get_double (value) * PANGO_SCALE);
 958             g_object_notify (object, "size");
 959             break;
 960           }
 961
 962         if (celltext->fixed_height_rows != -1)
 963           celltext->calc_fixed_height = TRUE;
 964
 965         notify_set_changed (object, old_set_mask & pango_font_description_get_set_fields (celltext->font));
 966         g_object_notify (object, "font_desc");
 967         g_object_notify (object, "font");
 968
 969         break;
 970       }
 971
 972     case PROP_SCALE:
 973       celltext->font_scale = g_value_get_double (value);
 974       celltext->scale_set = TRUE;
 975       if (celltext->fixed_height_rows != -1)
 976         celltext->calc_fixed_height = TRUE;
 977       g_object_notify (object, "scale_set");
 978       break;
 979
 980     case PROP_EDITABLE:
 981       celltext->editable = g_value_get_boolean (value);
 982       celltext->editable_set = TRUE;
 983       if (celltext->editable)
 984         GTK_CELL_RENDERER (celltext)->mode = GTK_CELL_RENDERER_MODE_EDITABLE;
 985       else
 986         GTK_CELL_RENDERER (celltext)->mode = GTK_CELL_RENDERER_MODE_INERT;
 987       g_object_notify (object, "editable_set");
 988       break;
 989
 990     case PROP_STRIKETHROUGH:
 991       celltext->strikethrough = g_value_get_boolean (value);
 992       celltext->strikethrough_set = TRUE;
 993       g_object_notify (object, "strikethrough_set");
 994       break;
 995
 996     case PROP_UNDERLINE:
 997       celltext->underline_style = g_value_get_enum (value);
 998       celltext->underline_set = TRUE;
 999       g_object_notify (object, "underline_set");
1000
1001       break;
1002
1003     case PROP_RISE:
1004       celltext->rise = g_value_get_int (value);
1005       celltext->rise_set = TRUE;
1006       g_object_notify (object, "rise_set");
1007       if (celltext->fixed_height_rows != -1)
1008         celltext->calc_fixed_height = TRUE;
1009       break;
1010
1011     case PROP_BACKGROUND_SET:
1012       celltext->background_set = g_value_get_boolean (value);
1013       break;
1014
1015     case PROP_FOREGROUND_SET:
1016       celltext->foreground_set = g_value_get_boolean (value);
1017       break;
1018
1019     case PROP_FAMILY_SET:
1020     case PROP_STYLE_SET:
1021     case PROP_VARIANT_SET:
1022     case PROP_WEIGHT_SET:
1023     case PROP_STRETCH_SET:
1024     case PROP_SIZE_SET:
1025       if (!g_value_get_boolean (value))
1026         {
1027           pango_font_description_unset_fields (celltext->font,
1028                                                get_property_font_set_mask (param_id));
1029         }
1030       else
1031         {
1032           PangoFontMask changed_mask;
1033
1034           changed_mask = set_font_desc_fields (celltext->font,
1035                                                get_property_font_set_mask (param_id));
1036           notify_fields_changed (G_OBJECT (celltext), changed_mask);
1037         }
1038       break;
1039
1040     case PROP_SCALE_SET:
1041       celltext->scale_set = g_value_get_boolean (value);
1042       break;
1043
1044     case PROP_EDITABLE_SET:
1045       celltext->editable_set = g_value_get_boolean (value);
1046       break;
1047
1048     case PROP_STRIKETHROUGH_SET:
1049       celltext->strikethrough_set = g_value_get_boolean (value);
1050       break;
1051
1052     case PROP_UNDERLINE_SET:
1053       celltext->underline_set = g_value_get_boolean (value);
1054       break;
1055
1056     case PROP_RISE_SET:
1057       celltext->rise_set = g_value_get_boolean (value);
1058       break;
1059
1060     default:
1061       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
1062       break;
1063     }
1064 }
1065
1066 /**
1067  * gtk_cell_renderer_text_new:
1068  *
1069  * Creates a new #GtkCellRendererText. Adjust how text is drawn using
1070  * object properties. Object properties can be
1071  * set globally (with g_object_set()). Also, with #GtkTreeViewColumn,
1072  * you can bind a property to a value in a #GtkTreeModel. For example,
1073  * you can bind the "text" property on the cell renderer to a string
1074  * value in the model, thus rendering a different string in each row
1075  * of the #GtkTreeView
1076  *
1077  * Return value: the new cell renderer
1078  **/
1079 GtkCellRenderer *
1080 gtk_cell_renderer_text_new (void)
1081 {
1082   return g_object_new (GTK_TYPE_CELL_RENDERER_TEXT, NULL);
1083 }
1084
1085 static void
1086 add_attr (PangoAttrList  *attr_list,
1087           PangoAttribute *attr)
1088 {
1089   attr->start_index = 0;
1090   attr->end_index = G_MAXINT;
1091
1092   pango_attr_list_insert (attr_list, attr);
1093 }
1094
1095 static PangoLayout*
1096 get_layout (GtkCellRendererText *celltext,
1097             GtkWidget           *widget,
1098             gboolean             will_render,
1099             GtkCellRendererState flags)
1100 {
1101   PangoAttrList *attr_list;
1102   PangoLayout *layout;
1103   PangoUnderline uline;
1104
1105   layout = gtk_widget_create_pango_layout (widget, celltext->text);
1106
1107   if (celltext->extra_attrs)
1108     attr_list = pango_attr_list_copy (celltext->extra_attrs);
1109   else
1110     attr_list = pango_attr_list_new ();
1111
1112   if (will_render)
1113     {
1114       /* Add options that affect appearance but not size */
1115
1116       /* note that background doesn't go here, since it affects
1117        * background_area not the PangoLayout area
1118        */
1119
1120       if (celltext->foreground_set)
1121         {
1122           PangoColor color;
1123
1124           color = celltext->foreground;
1125
1126           add_attr (attr_list,
1127                     pango_attr_foreground_new (color.red, color.green, color.blue));
1128         }
1129
1130       if (celltext->strikethrough_set)
1131         add_attr (attr_list,
1132                   pango_attr_strikethrough_new (celltext->strikethrough));
1133     }
1134
1135   add_attr (attr_list, pango_attr_font_desc_new (celltext->font));
1136
1137   if (celltext->scale_set &&
1138       celltext->font_scale != 1.0)
1139     add_attr (attr_list, pango_attr_scale_new (celltext->font_scale));
1140
1141   if (celltext->underline_set)
1142     uline = celltext->underline_style;
1143   else
1144     uline = PANGO_UNDERLINE_NONE;
1145
1146   if ((flags & GTK_CELL_RENDERER_PRELIT) == GTK_CELL_RENDERER_PRELIT)
1147     {
1148       switch (uline)
1149         {
1150         case PANGO_UNDERLINE_NONE:
1151           uline = PANGO_UNDERLINE_SINGLE;
1152           break;
1153
1154         case PANGO_UNDERLINE_SINGLE:
1155           uline = PANGO_UNDERLINE_DOUBLE;
1156           break;
1157
1158         default:
1159           break;
1160         }
1161     }
1162
1163   if (uline != PANGO_UNDERLINE_NONE)
1164     add_attr (attr_list, pango_attr_underline_new (celltext->underline_style));
1165
1166   if (celltext->rise_set)
1167     add_attr (attr_list, pango_attr_rise_new (celltext->rise));
1168
1169   pango_layout_set_attributes (layout, attr_list);
1170   pango_layout_set_width (layout, -1);
1171
1172   pango_attr_list_unref (attr_list);
1173
1174   return layout;
1175 }
1176
1177 static void
1178 gtk_cell_renderer_text_get_size (GtkCellRenderer *cell,
1179                                  GtkWidget       *widget,
1180                                  GdkRectangle    *cell_area,
1181                                  gint            *x_offset,
1182                                  gint            *y_offset,
1183                                  gint            *width,
1184                                  gint            *height)
1185 {
1186   GtkCellRendererText *celltext = (GtkCellRendererText *) cell;
1187   PangoRectangle rect;
1188   PangoLayout *layout;
1189
1190   if (celltext->calc_fixed_height)
1191     {
1192       PangoContext *context;
1193       PangoFontMetrics *metrics;
1194       PangoFontDescription *font_desc;
1195       gint row_height;
1196
1197       font_desc = pango_font_description_copy (widget->style->font_desc);
1198       pango_font_description_merge (font_desc, celltext->font, TRUE);
1199
1200       if (celltext->scale_set)
1201         pango_font_description_set_size (font_desc,
1202                                          celltext->font_scale * pango_font_description_get_size (font_desc));
1203
1204       context = gtk_widget_get_pango_context (widget);
1205
1206       metrics = pango_context_get_metrics (context,
1207                                            font_desc,
1208                                            pango_context_get_language (context));
1209       row_height = (pango_font_metrics_get_ascent (metrics) +
1210                     pango_font_metrics_get_descent (metrics));
1211       pango_font_metrics_unref (metrics);
1212
1213       gtk_cell_renderer_set_fixed_size (cell,
1214                                         cell->width, 2*cell->ypad +
1215                                         celltext->fixed_height_rows * PANGO_PIXELS (row_height));
1216
1217       if (height)
1218         {
1219           *height = cell->height;
1220           height = NULL;
1221         }
1222       celltext->calc_fixed_height = FALSE;
1223       if (width == NULL)
1224         return;
1225     }
1226   layout = get_layout (celltext, widget, FALSE, 0);
1227   pango_layout_get_pixel_extents (layout, NULL, &rect);
1228
1229   if (width)
1230     *width = GTK_CELL_RENDERER (celltext)->xpad * 2 + rect.width;
1231
1232   if (height)
1233     *height = GTK_CELL_RENDERER (celltext)->ypad * 2 + rect.height;
1234
1235   if (cell_area)
1236     {
1237       if (x_offset)
1238         {
1239           *x_offset = cell->xalign * (cell_area->width - rect.width - (2 * cell->xpad));
1240           *x_offset = MAX (*x_offset, 0);
1241         }
1242       if (y_offset)
1243         {
1244           *y_offset = cell->yalign * (cell_area->height - rect.height - (2 * cell->ypad));
1245           *y_offset = MAX (*y_offset, 0);
1246         }
1247     }
1248
1249   g_object_unref (layout);
1250 }
1251
1252 static void
1253 gtk_cell_renderer_text_render (GtkCellRenderer      *cell,
1254                                GdkWindow            *window,
1255                                GtkWidget            *widget,
1256                                GdkRectangle         *background_area,
1257                                GdkRectangle         *cell_area,
1258                                GdkRectangle         *expose_area,
1259                                GtkCellRendererState  flags)
1260
1261 {
1262   GtkCellRendererText *celltext = (GtkCellRendererText *) cell;
1263   PangoLayout *layout;
1264   GtkStateType state;
1265   gint x_offset;
1266   gint y_offset;
1267
1268   layout = get_layout (celltext, widget, TRUE, flags);
1269
1270   gtk_cell_renderer_text_get_size (cell, widget, cell_area, &x_offset, &y_offset, NULL, NULL);
1271
1272   if ((flags & GTK_CELL_RENDERER_SELECTED) == GTK_CELL_RENDERER_SELECTED)
1273     {
1274       if (GTK_WIDGET_HAS_FOCUS (widget))
1275         state = GTK_STATE_SELECTED;
1276       else
1277         state = GTK_STATE_ACTIVE;
1278     }
1279   else
1280     {
1281       if (GTK_WIDGET_STATE (widget) == GTK_STATE_INSENSITIVE)
1282         state = GTK_STATE_INSENSITIVE;
1283       else
1284         state = GTK_STATE_NORMAL;
1285     }
1286
1287   if (celltext->background_set && state != GTK_STATE_SELECTED)
1288     {
1289       GdkColor color;
1290       GdkGC *gc;
1291
1292       color.red = celltext->background.red;
1293       color.green = celltext->background.green;
1294       color.blue = celltext->background.blue;
1295
1296       gc = gdk_gc_new (window);
1297
1298       gdk_gc_set_rgb_fg_color (gc, &color);
1299
1300       gdk_draw_rectangle (window,
1301                           gc,
1302                           TRUE,
1303                           background_area->x,
1304                           background_area->y,
1305                           background_area->width,
1306                           background_area->height);
1307
1308       g_object_unref (gc);
1309     }
1310
1311   gtk_paint_layout (widget->style,
1312                     window,
1313                     state,
1314                     TRUE,
1315                     cell_area,
1316                     widget,
1317                     "cellrenderertext",
1318                     cell_area->x + x_offset + cell->xpad,
1319                     cell_area->y + y_offset + cell->ypad,
1320                     layout);
1321
1322   g_object_unref (layout);
1323 }
1324
1325 static void
1326 gtk_cell_renderer_text_editing_done (GtkCellEditable *entry,
1327                                      gpointer         data)
1328 {
1329   const gchar *path;
1330   const gchar *new_text;
1331
1332   if (GTK_ENTRY (entry)->editing_canceled)
1333     return;
1334
1335   path = g_object_get_data (G_OBJECT (entry), GTK_CELL_RENDERER_TEXT_PATH);
1336   new_text = gtk_entry_get_text (GTK_ENTRY (entry));
1337
1338   g_signal_emit (data, text_cell_renderer_signals[EDITED], 0, path, new_text);
1339 }
1340
1341 static gboolean
1342 gtk_cell_renderer_text_focus_out_event (GtkWidget *entry,
1343                                         GdkEvent  *event,
1344                                         gpointer   data)
1345 {
1346   gtk_cell_renderer_text_editing_done (GTK_CELL_EDITABLE (entry), data);
1347
1348   /* entry needs focus-out-event */
1349   return FALSE;
1350 }
1351
1352 static GtkCellEditable *
1353 gtk_cell_renderer_text_start_editing (GtkCellRenderer      *cell,
1354                                       GdkEvent             *event,
1355                                       GtkWidget            *widget,
1356                                       const gchar          *path,
1357                                       GdkRectangle         *background_area,
1358                                       GdkRectangle         *cell_area,
1359                                       GtkCellRendererState  flags)
1360 {
1361   GtkCellRendererText *celltext;
1362   GtkWidget *entry;
1363
1364   celltext = GTK_CELL_RENDERER_TEXT (cell);
1365
1366   /* If the cell isn't editable we return NULL. */
1367   if (celltext->editable == FALSE)
1368     return NULL;
1369
1370   entry = g_object_new (GTK_TYPE_ENTRY,
1371                         "has_frame", FALSE,
1372                         NULL);
1373
1374   gtk_entry_set_text (GTK_ENTRY (entry), celltext->text);
1375   g_object_set_data_full (G_OBJECT (entry), GTK_CELL_RENDERER_TEXT_PATH, g_strdup (path), g_free);
1376
1377   gtk_editable_select_region (GTK_EDITABLE (entry), 0, -1);
1378
1379   gtk_widget_show (entry);
1380   g_signal_connect (entry,
1381                     "editing_done",
1382                     G_CALLBACK (gtk_cell_renderer_text_editing_done),
1383                     celltext);
1384   g_signal_connect (entry, "focus_out_event",
1385                     G_CALLBACK (gtk_cell_renderer_text_focus_out_event),
1386                     celltext);
1387
1388   return GTK_CELL_EDITABLE (entry);
1389
1390 }
1391
1392 /**
1393  * gtk_cell_renderer_text_set_fixed_height_from_font:
1394  * @renderer: A #GtkCellRendererText
1395  * @number_of_rows: Number of rows of text each cell renderer is allocated, or -1
1396  *
1397  * Sets the height of a renderer to explicitly be determined by the "font" and
1398  * "y_pad" property set on it.  Further changes in these properties do not
1399  * affect the height, so they must be accompanied by a subsequent call to this
1400  * function.  Using this function is unflexible, and should really only be used
1401  * if calculating the size of a cell is too slow (ie, a massive number of cells
1402  * displayed).  If @number_of_rows is -1, then the fixed height is unset, and
1403  * the height is determined by the properties again.
1404  **/
1405 void
1406 gtk_cell_renderer_text_set_fixed_height_from_font (GtkCellRendererText *renderer,
1407                                                    gint                 number_of_rows)
1408 {
1409   g_return_if_fail (GTK_IS_CELL_RENDERER_TEXT (renderer));
1410   g_return_if_fail (number_of_rows == -1 || number_of_rows > 0);
1411
1412   if (number_of_rows == -1)
1413     {
1414       gtk_cell_renderer_set_fixed_size (GTK_CELL_RENDERER (renderer),
1415                                         GTK_CELL_RENDERER (renderer)->width,
1416                                         -1);
1417     }
1418   else
1419     {
1420       renderer->fixed_height_rows = number_of_rows;
1421       renderer->calc_fixed_height = TRUE;
1422     }
1423 }