Pileus Git - ~andy/gtk/blob - tests/cellareascaffold.c

   1 /* cellareascaffold.c
   2  *
   3  * Copyright (C) 2010 Openismus GmbH
   4  *
   5  * Authors:
   6  *      Tristan Van Berkom <tristanvb@openismus.com>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public
  19  * License along with this library; if not, write to the
  20  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21  * Boston, MA 02111-1307, USA.
  22  */
  23
  24 #include <string.h>
  25 #include "cellareascaffold.h"
  26
  27 /* GObjectClass */
  28 static void      cell_area_scaffold_finalize                       (GObject              *object);
  29 static void      cell_area_scaffold_dispose                        (GObject              *object);
  30 static void      cell_area_scaffold_set_property                   (GObject              *object,
  31                                                                     guint                 prop_id,
  32                                                                     const GValue         *value,
  33                                                                     GParamSpec           *pspec);
  34 static void      cell_area_scaffold_get_property                   (GObject              *object,
  35                                                                     guint                 prop_id,
  36                                                                     GValue               *value,
  37                                                                     GParamSpec           *pspec);
  38
  39 /* GtkWidgetClass */
  40 static void      cell_area_scaffold_realize                        (GtkWidget       *widget);
  41 static void      cell_area_scaffold_unrealize                      (GtkWidget       *widget);
  42 static gboolean  cell_area_scaffold_draw                           (GtkWidget       *widget,
  43                                                                     cairo_t         *cr);
  44 static void      cell_area_scaffold_size_allocate                  (GtkWidget       *widget,
  45                                                                     GtkAllocation   *allocation);
  46 static void      cell_area_scaffold_get_preferred_width            (GtkWidget       *widget,
  47                                                                     gint            *minimum_size,
  48                                                                     gint            *natural_size);
  49 static void      cell_area_scaffold_get_preferred_height_for_width (GtkWidget       *widget,
  50                                                                     gint             for_size,
  51                                                                     gint            *minimum_size,
  52                                                                     gint            *natural_size);
  53 static void      cell_area_scaffold_get_preferred_height           (GtkWidget       *widget,
  54                                                                     gint            *minimum_size,
  55                                                                     gint            *natural_size);
  56 static void      cell_area_scaffold_get_preferred_width_for_height (GtkWidget       *widget,
  57                                                                     gint             for_size,
  58                                                                     gint            *minimum_size,
  59                                                                     gint            *natural_size);
  60 static void      cell_area_scaffold_map                            (GtkWidget       *widget);
  61 static void      cell_area_scaffold_unmap                          (GtkWidget       *widget);
  62 static gint      cell_area_scaffold_focus                          (GtkWidget       *widget,
  63                                                                     GtkDirectionType direction);
  64 static gboolean  cell_area_scaffold_button_press                   (GtkWidget       *widget,
  65                                                                     GdkEventButton  *event);
  66
  67 /* GtkContainerClass */
  68 static void      cell_area_scaffold_forall                         (GtkContainer    *container,
  69                                                                     gboolean         include_internals,
  70                                                                     GtkCallback      callback,
  71                                                                     gpointer         callback_data);
  72 static void      cell_area_scaffold_remove                         (GtkContainer    *container,
  73                                                                     GtkWidget       *child);
  74 static void      cell_area_scaffold_put_edit_widget                (CellAreaScaffold *scaffold,
  75                                                                     GtkWidget        *edit_widget,
  76                                                                     gint              x,
  77                                                                     gint              y,
  78                                                                     gint              width,
  79                                                                     gint              height);
  80
  81 /* CellAreaScaffoldClass */
  82 static void      cell_area_scaffold_activate                       (CellAreaScaffold *scaffold);
  83
  84 /* CellArea/GtkTreeModel callbacks */
  85 static void      size_changed_cb                                   (GtkCellAreaContext *context,
  86                                                                     GParamSpec       *pspec,
  87                                                                     CellAreaScaffold *scaffold);
  88 static void      focus_changed_cb                                  (GtkCellArea      *area,
  89                                                                     GtkCellRenderer  *renderer,
  90                                                                     const gchar      *path,
  91                                                                     CellAreaScaffold *scaffold);
  92 static void      add_editable_cb                                   (GtkCellArea      *area,
  93                                                                     GtkCellRenderer  *renderer,
  94                                                                     GtkCellEditable  *edit_widget,
  95                                                                     GdkRectangle     *cell_area,
  96                                                                     const gchar      *path,
  97                                                                     CellAreaScaffold *scaffold);
  98 static void      remove_editable_cb                                (GtkCellArea      *area,
  99                                                                     GtkCellRenderer  *renderer,
 100                                                                     GtkCellEditable  *edit_widget,
 101                                                                     CellAreaScaffold *scaffold);
 102 static void      row_changed_cb                                    (GtkTreeModel     *model,
 103                                                                     GtkTreePath      *path,
 104                                                                     GtkTreeIter      *iter,
 105                                                                     CellAreaScaffold *scaffold);
 106 static void      row_inserted_cb                                   (GtkTreeModel     *model,
 107                                                                     GtkTreePath      *path,
 108                                                                     GtkTreeIter      *iter,
 109                                                                     CellAreaScaffold *scaffold);
 110 static void      row_deleted_cb                                    (GtkTreeModel     *model,
 111                                                                     GtkTreePath      *path,
 112                                                                     CellAreaScaffold *scaffold);
 113 static void      rows_reordered_cb                                 (GtkTreeModel     *model,
 114                                                                     GtkTreePath      *parent,
 115                                                                     GtkTreeIter      *iter,
 116                                                                     gint             *new_order,
 117                                                                     CellAreaScaffold *scaffold);
 118
 119 typedef struct {
 120   gint    size; /* The size of the row in the scaffold's opposing orientation */
 121 } RowData;
 122
 123 struct _CellAreaScaffoldPrivate {
 124
 125   /* Window for catching events and dispatching them to the cell area */
 126   GdkWindow       *event_window;
 127
 128   /* The model we're showing data for */
 129   GtkTreeModel    *model;
 130   gulong           row_changed_id;
 131   gulong           row_inserted_id;
 132   gulong           row_deleted_id;
 133   gulong           rows_reordered_id;
 134
 135   /* The area rendering the data and a global context */
 136   GtkCellArea        *area;
 137   GtkCellAreaContext *context;
 138
 139   /* Cache some info about rows (hieghts etc) */
 140   GArray          *row_data;
 141
 142   /* Focus handling */
 143   gint             focus_row;
 144   gulong           focus_changed_id;
 145
 146   /* Check when the underlying area changes the size and
 147    * we need to queue a redraw */
 148   gulong           size_changed_id;
 149
 150   /* Currently edited widget */
 151   GtkWidget       *edit_widget;
 152   GdkRectangle     edit_rect;
 153   gulong           add_editable_id;
 154   gulong           remove_editable_id;
 155
 156
 157   gint             row_spacing;
 158   gint             indent;
 159 };
 160
 161 enum {
 162   PROP_0,
 163   PROP_ORIENTATION
 164 };
 165
 166 enum {
 167   ACTIVATE,
 168   N_SIGNALS
 169 };
 170
 171 static guint scaffold_signals[N_SIGNALS] = { 0 };
 172
 173 #define DIRECTION_STR(dir)                              \
 174   ((dir) == GTK_DIR_TAB_FORWARD  ? "tab forward" :      \
 175    (dir) == GTK_DIR_TAB_BACKWARD ? "tab backward" :     \
 176    (dir) == GTK_DIR_UP           ? "up" :               \
 177    (dir) == GTK_DIR_DOWN         ? "down" :             \
 178    (dir) == GTK_DIR_LEFT         ? "left" :             \
 179    (dir) == GTK_DIR_RIGHT        ? "right" : "invalid")
 180
 181 G_DEFINE_TYPE_WITH_CODE (CellAreaScaffold, cell_area_scaffold, GTK_TYPE_CONTAINER,
 182                          G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL));
 183
 184
 185 static void
 186 cell_area_scaffold_init (CellAreaScaffold *scaffold)
 187 {
 188   CellAreaScaffoldPrivate *priv;
 189
 190   scaffold->priv = G_TYPE_INSTANCE_GET_PRIVATE (scaffold,
 191                                                 TYPE_CELL_AREA_SCAFFOLD,
 192                                                 CellAreaScaffoldPrivate);
 193   priv = scaffold->priv;
 194
 195   priv->area    = gtk_cell_area_box_new ();
 196   priv->context = gtk_cell_area_create_context (priv->area);
 197
 198   priv->row_data = g_array_new (FALSE, FALSE, sizeof (RowData));
 199
 200   gtk_widget_set_has_window (GTK_WIDGET (scaffold), FALSE);
 201   gtk_widget_set_can_focus (GTK_WIDGET (scaffold), TRUE);
 202
 203   priv->size_changed_id =
 204     g_signal_connect (priv->context, "notify",
 205                       G_CALLBACK (size_changed_cb), scaffold);
 206
 207   priv->focus_changed_id =
 208     g_signal_connect (priv->area, "focus-changed",
 209                       G_CALLBACK (focus_changed_cb), scaffold);
 210
 211   priv->add_editable_id =
 212     g_signal_connect (priv->area, "add-editable",
 213                       G_CALLBACK (add_editable_cb), scaffold);
 214
 215   priv->remove_editable_id =
 216     g_signal_connect (priv->area, "remove-editable",
 217                       G_CALLBACK (remove_editable_cb), scaffold);
 218 }
 219
 220 static void
 221 cell_area_scaffold_class_init (CellAreaScaffoldClass *class)
 222 {
 223   GObjectClass      *gobject_class;
 224   GtkWidgetClass    *widget_class;
 225   GtkContainerClass *container_class;
 226
 227   gobject_class = G_OBJECT_CLASS (class);
 228   gobject_class->dispose = cell_area_scaffold_dispose;
 229   gobject_class->finalize = cell_area_scaffold_finalize;
 230   gobject_class->get_property = cell_area_scaffold_get_property;
 231   gobject_class->set_property = cell_area_scaffold_set_property;
 232
 233   widget_class = GTK_WIDGET_CLASS (class);
 234   widget_class->realize = cell_area_scaffold_realize;
 235   widget_class->unrealize = cell_area_scaffold_unrealize;
 236   widget_class->draw = cell_area_scaffold_draw;
 237   widget_class->size_allocate = cell_area_scaffold_size_allocate;
 238   widget_class->get_preferred_width = cell_area_scaffold_get_preferred_width;
 239   widget_class->get_preferred_height_for_width = cell_area_scaffold_get_preferred_height_for_width;
 240   widget_class->get_preferred_height = cell_area_scaffold_get_preferred_height;
 241   widget_class->get_preferred_width_for_height = cell_area_scaffold_get_preferred_width_for_height;
 242   widget_class->map = cell_area_scaffold_map;
 243   widget_class->unmap = cell_area_scaffold_unmap;
 244   widget_class->focus = cell_area_scaffold_focus;
 245   widget_class->button_press_event = cell_area_scaffold_button_press;
 246
 247   container_class = GTK_CONTAINER_CLASS (class);
 248   container_class->forall = cell_area_scaffold_forall;
 249   container_class->remove = cell_area_scaffold_remove;
 250
 251   class->activate = cell_area_scaffold_activate;
 252
 253   g_object_class_override_property (gobject_class, PROP_ORIENTATION, "orientation");
 254
 255   scaffold_signals[ACTIVATE] =
 256     g_signal_new ("activate",
 257                   G_OBJECT_CLASS_TYPE (gobject_class),
 258                   G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
 259                   G_STRUCT_OFFSET (CellAreaScaffoldClass, activate),
 260                   NULL, NULL,
 261                   g_cclosure_marshal_VOID__VOID,
 262                   G_TYPE_NONE, 0);
 263   widget_class->activate_signal = scaffold_signals[ACTIVATE];
 264
 265
 266   g_type_class_add_private (gobject_class, sizeof (CellAreaScaffoldPrivate));
 267 }
 268
 269 /*********************************************************
 270  *                    GObjectClass                       *
 271  *********************************************************/
 272 static void
 273 cell_area_scaffold_finalize (GObject *object)
 274 {
 275   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (object);
 276   CellAreaScaffoldPrivate *priv;
 277
 278   priv = scaffold->priv;
 279
 280   g_array_free (priv->row_data, TRUE);
 281
 282   G_OBJECT_CLASS (cell_area_scaffold_parent_class)->finalize (object);
 283 }
 284
 285 static void
 286 cell_area_scaffold_dispose (GObject *object)
 287 {
 288   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (object);
 289   CellAreaScaffoldPrivate *priv;
 290
 291   priv = scaffold->priv;
 292
 293   cell_area_scaffold_set_model (scaffold, NULL);
 294
 295   if (priv->context)
 296     {
 297       /* Disconnect signals */
 298       g_signal_handler_disconnect (priv->context, priv->size_changed_id);
 299
 300       g_object_unref (priv->context);
 301       priv->context = NULL;
 302       priv->size_changed_id = 0;
 303     }
 304
 305   if (priv->area)
 306     {
 307       /* Disconnect signals */
 308       g_signal_handler_disconnect (priv->area, priv->focus_changed_id);
 309       g_signal_handler_disconnect (priv->area, priv->add_editable_id);
 310       g_signal_handler_disconnect (priv->area, priv->remove_editable_id);
 311
 312       g_object_unref (priv->area);
 313       priv->area = NULL;
 314       priv->focus_changed_id = 0;
 315     }
 316
 317   G_OBJECT_CLASS (cell_area_scaffold_parent_class)->dispose (object);
 318 }
 319
 320 static void
 321 cell_area_scaffold_set_property (GObject      *object,
 322                                  guint         prop_id,
 323                                  const GValue *value,
 324                                  GParamSpec   *pspec)
 325 {
 326   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (object);
 327   CellAreaScaffoldPrivate *priv;
 328
 329   priv = scaffold->priv;
 330
 331   switch (prop_id)
 332     {
 333     case PROP_ORIENTATION:
 334       gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->area),
 335                                       g_value_get_enum (value));
 336       break;
 337     default:
 338       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 339       break;
 340     }
 341 }
 342
 343 static void
 344 cell_area_scaffold_get_property (GObject    *object,
 345                                  guint       prop_id,
 346                                  GValue     *value,
 347                                  GParamSpec *pspec)
 348 {
 349   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (object);
 350   CellAreaScaffoldPrivate *priv;
 351
 352   priv = scaffold->priv;
 353
 354   switch (prop_id)
 355     {
 356     case PROP_ORIENTATION:
 357       g_value_set_enum (value,
 358                         gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area)));
 359       break;
 360     default:
 361       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 362       break;
 363     }
 364 }
 365
 366 /*********************************************************
 367  *                    GtkWidgetClass                     *
 368  *********************************************************/
 369 static void
 370 cell_area_scaffold_realize (GtkWidget *widget)
 371 {
 372   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 373   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 374   GtkAllocation            allocation;
 375   GdkWindow               *window;
 376   GdkWindowAttr            attributes;
 377   gint                     attributes_mask;
 378
 379   gtk_widget_get_allocation (widget, &allocation);
 380
 381   gtk_widget_set_realized (widget, TRUE);
 382
 383   attributes.window_type = GDK_WINDOW_CHILD;
 384   attributes.x = allocation.x;
 385   attributes.y = allocation.y;
 386   attributes.width = allocation.width;
 387   attributes.height = allocation.height;
 388   attributes.wclass = GDK_INPUT_ONLY;
 389   attributes.event_mask = gtk_widget_get_events (widget);
 390   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
 391                             GDK_BUTTON_RELEASE_MASK |
 392                             GDK_KEY_PRESS_MASK |
 393                             GDK_KEY_RELEASE_MASK);
 394
 395   attributes_mask = GDK_WA_X | GDK_WA_Y;
 396
 397   window = gtk_widget_get_parent_window (widget);
 398   gtk_widget_set_window (widget, window);
 399   g_object_ref (window);
 400
 401   priv->event_window = gdk_window_new (window, &attributes, attributes_mask);
 402   gdk_window_set_user_data (priv->event_window, widget);
 403
 404   gtk_widget_style_attach (widget);
 405 }
 406
 407 static void
 408 cell_area_scaffold_unrealize (GtkWidget *widget)
 409 {
 410   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 411   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 412
 413   if (priv->event_window)
 414     {
 415       gdk_window_set_user_data (priv->event_window, NULL);
 416       gdk_window_destroy (priv->event_window);
 417       priv->event_window = NULL;
 418     }
 419
 420   GTK_WIDGET_CLASS (cell_area_scaffold_parent_class)->unrealize (widget);
 421 }
 422
 423 static gboolean
 424 cell_area_scaffold_draw (GtkWidget       *widget,
 425                          cairo_t         *cr)
 426 {
 427   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 428   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 429   GtkOrientation           orientation;
 430   GtkTreeIter              iter;
 431   gboolean                 valid;
 432   GdkRectangle             background_area;
 433   GdkRectangle             render_area;
 434   GtkAllocation            allocation;
 435   gint                     i = 0;
 436   gboolean                 have_focus;
 437   GtkCellRendererState     flags;
 438
 439   if (!priv->model)
 440     return FALSE;
 441
 442   have_focus  = gtk_widget_has_focus (widget);
 443   orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area));
 444
 445   gtk_widget_get_allocation (widget, &allocation);
 446
 447   render_area.x      = 0;
 448   render_area.y      = 0;
 449   render_area.width  = allocation.width;
 450   render_area.height = allocation.height;
 451
 452   background_area = render_area;
 453
 454   if (orientation == GTK_ORIENTATION_HORIZONTAL)
 455     {
 456       render_area.x      = priv->indent;
 457       render_area.width -= priv->indent;
 458     }
 459   else
 460     {
 461       render_area.y       = priv->indent;
 462       render_area.height -= priv->indent;
 463     }
 464
 465   valid = gtk_tree_model_get_iter_first (priv->model, &iter);
 466   while (valid)
 467     {
 468       RowData *data = &g_array_index (priv->row_data, RowData, i);
 469
 470       if (have_focus && i == priv->focus_row)
 471         flags = GTK_CELL_RENDERER_FOCUSED;
 472       else
 473         flags = 0;
 474
 475       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 476         {
 477           render_area.height     = data->size;
 478
 479           background_area.height = render_area.height;
 480           background_area.y      = render_area.y;
 481
 482           if (i == 0)
 483             {
 484               background_area.height += priv->row_spacing / 2;
 485               background_area.height += priv->row_spacing % 2;
 486             }
 487           else if (i == priv->row_data->len - 1)
 488             {
 489               background_area.y      -= priv->row_spacing / 2;
 490               background_area.height += priv->row_spacing / 2;
 491             }
 492           else
 493             {
 494               background_area.y      -= priv->row_spacing / 2;
 495               background_area.height += priv->row_spacing;
 496             }
 497         }
 498       else /* GTK_ORIENTATION_VERTICAL */
 499         {
 500           render_area.width     = data->size;
 501
 502           background_area.width = render_area.width;
 503           background_area.x     = render_area.x;
 504
 505           if (i == 0)
 506             {
 507               background_area.width += priv->row_spacing / 2;
 508               background_area.width += priv->row_spacing % 2;
 509             }
 510           else if (i == priv->row_data->len - 1)
 511             {
 512               background_area.x     -= priv->row_spacing / 2;
 513               background_area.width += priv->row_spacing / 2;
 514             }
 515           else
 516             {
 517               background_area.x     -= priv->row_spacing / 2;
 518               background_area.width += priv->row_spacing;
 519             }
 520         }
 521
 522       gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
 523       gtk_cell_area_render (priv->area, priv->context, widget, cr,
 524                             &background_area, &render_area, flags,
 525                             (have_focus && i == priv->focus_row));
 526
 527       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 528         {
 529           render_area.y += data->size;
 530           render_area.y += priv->row_spacing;
 531         }
 532       else
 533         {
 534           render_area.x += data->size;
 535           render_area.x += priv->row_spacing;
 536         }
 537
 538       i++;
 539       valid = gtk_tree_model_iter_next (priv->model, &iter);
 540     }
 541
 542   /* Draw the edit widget after drawing everything else */
 543   GTK_WIDGET_CLASS (cell_area_scaffold_parent_class)->draw (widget, cr);
 544
 545   return FALSE;
 546 }
 547
 548 static void
 549 request_all_base (CellAreaScaffold *scaffold)
 550 {
 551   CellAreaScaffoldPrivate *priv = scaffold->priv;
 552   GtkWidget               *widget = GTK_WIDGET (scaffold);
 553   GtkOrientation           orientation;
 554   GtkTreeIter              iter;
 555   gboolean                 valid;
 556
 557   if (!priv->model)
 558     return;
 559
 560   g_signal_handler_block (priv->context, priv->size_changed_id);
 561
 562   orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area));
 563
 564   valid = gtk_tree_model_get_iter_first (priv->model, &iter);
 565   while (valid)
 566     {
 567       gint min, nat;
 568
 569       gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
 570
 571       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 572         gtk_cell_area_get_preferred_width (priv->area, priv->context, widget, &min, &nat);
 573       else
 574         gtk_cell_area_get_preferred_height (priv->area, priv->context, widget, &min, &nat);
 575
 576       valid = gtk_tree_model_iter_next (priv->model, &iter);
 577     }
 578
 579   g_signal_handler_unblock (priv->context, priv->size_changed_id);
 580 }
 581
 582 static void
 583 get_row_sizes (CellAreaScaffold *scaffold,
 584                GArray           *array,
 585                gint              for_size)
 586 {
 587   CellAreaScaffoldPrivate *priv = scaffold->priv;
 588   GtkWidget               *widget = GTK_WIDGET (scaffold);
 589   GtkOrientation           orientation;
 590   GtkTreeIter              iter;
 591   gboolean                 valid;
 592   gint                     i = 0;
 593
 594   if (!priv->model)
 595     return;
 596
 597   orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area));
 598
 599   valid = gtk_tree_model_get_iter_first (priv->model, &iter);
 600   while (valid)
 601     {
 602       RowData *data = &g_array_index (array, RowData, i);
 603
 604       gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
 605
 606       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 607         gtk_cell_area_get_preferred_height_for_width (priv->area, priv->context, widget,
 608                                                       for_size, &data->size, NULL);
 609       else
 610         gtk_cell_area_get_preferred_width_for_height (priv->area, priv->context, widget,
 611                                                       for_size, &data->size, NULL);
 612
 613       i++;
 614       valid = gtk_tree_model_iter_next (priv->model, &iter);
 615     }
 616 }
 617
 618 static void
 619 cell_area_scaffold_size_allocate (GtkWidget           *widget,
 620                                   GtkAllocation       *allocation)
 621 {
 622   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 623   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 624   GtkOrientation           orientation;
 625
 626   gtk_widget_set_allocation (widget, allocation);
 627
 628   if (gtk_widget_get_realized (widget))
 629     gdk_window_move_resize (priv->event_window,
 630                             allocation->x,
 631                             allocation->y,
 632                             allocation->width,
 633                             allocation->height);
 634
 635   /* Allocate the child GtkCellEditable widget if one is currently editing a row */
 636   if (priv->edit_widget)
 637     gtk_widget_size_allocate (priv->edit_widget, &priv->edit_rect);
 638
 639   if (!priv->model)
 640     return;
 641
 642   orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area));
 643
 644   /* Cache the per-row sizes and allocate the context */
 645   if (orientation == GTK_ORIENTATION_HORIZONTAL)
 646     {
 647       gtk_cell_area_context_allocate (priv->context, allocation->width - priv->indent, -1);
 648       get_row_sizes (scaffold, priv->row_data, allocation->width - priv->indent);
 649     }
 650   else
 651     {
 652       gtk_cell_area_context_allocate (priv->context, -1, allocation->height - priv->indent);
 653       get_row_sizes (scaffold, priv->row_data, allocation->height - priv->indent);
 654     }
 655 }
 656
 657
 658 static void
 659 cell_area_scaffold_get_preferred_width (GtkWidget       *widget,
 660                                         gint            *minimum_size,
 661                                         gint            *natural_size)
 662 {
 663   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 664   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 665   GtkOrientation           orientation;
 666
 667   if (!priv->model)
 668     return;
 669
 670   orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area));
 671
 672   if (orientation == GTK_ORIENTATION_HORIZONTAL)
 673     {
 674       request_all_base (scaffold);
 675
 676       gtk_cell_area_context_get_preferred_width (priv->context, minimum_size, natural_size);
 677
 678       *minimum_size += priv->indent;
 679       *natural_size += priv->indent;
 680     }
 681   else
 682     {
 683       gint min_size, nat_size;
 684
 685       GTK_WIDGET_GET_CLASS (widget)->get_preferred_height (widget, &min_size, &nat_size);
 686       GTK_WIDGET_GET_CLASS (widget)->get_preferred_width_for_height (widget, min_size,
 687                                                                      minimum_size, natural_size);
 688     }
 689 }
 690
 691 static void
 692 cell_area_scaffold_get_preferred_height_for_width (GtkWidget       *widget,
 693                                                    gint             for_size,
 694                                                    gint            *minimum_size,
 695                                                    gint            *natural_size)
 696 {
 697   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 698   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 699   GtkOrientation           orientation;
 700
 701   if (!priv->model)
 702     return;
 703
 704   orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area));
 705
 706   if (orientation == GTK_ORIENTATION_HORIZONTAL)
 707     {
 708       GArray *request_array;
 709       gint    n_rows, i, full_size = 0;
 710
 711       n_rows = gtk_tree_model_iter_n_children (priv->model, NULL);
 712
 713       /* Get an array for the contextual request */
 714       request_array = g_array_new (FALSE, FALSE, sizeof (RowData));
 715       g_array_set_size (request_array, n_rows);
 716       memset (request_array->data, 0x0, n_rows * sizeof (RowData));
 717
 718       /* Gather each contextual size into the request array */
 719       get_row_sizes (scaffold, request_array, for_size - priv->indent);
 720
 721       /* Sum up the size and add some row spacing */
 722       for (i = 0; i < n_rows; i++)
 723         {
 724           RowData *data = &g_array_index (request_array, RowData, i);
 725
 726           full_size += data->size;
 727         }
 728
 729       full_size += MAX (0, n_rows -1) * priv->row_spacing;
 730
 731       g_array_free (request_array, TRUE);
 732
 733       *minimum_size = full_size;
 734       *natural_size = full_size;
 735     }
 736   else
 737     {
 738       GTK_WIDGET_GET_CLASS (widget)->get_preferred_height (widget, minimum_size, natural_size);
 739     }
 740 }
 741
 742 static void
 743 cell_area_scaffold_get_preferred_height (GtkWidget       *widget,
 744                                          gint            *minimum_size,
 745                                          gint            *natural_size)
 746 {
 747   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 748   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 749   GtkOrientation           orientation;
 750
 751   if (!priv->model)
 752     return;
 753
 754   orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area));
 755
 756   if (orientation == GTK_ORIENTATION_VERTICAL)
 757     {
 758       request_all_base (scaffold);
 759
 760       gtk_cell_area_context_get_preferred_height (priv->context, minimum_size, natural_size);
 761
 762       *minimum_size += priv->indent;
 763       *natural_size += priv->indent;
 764     }
 765   else
 766     {
 767       gint min_size, nat_size;
 768
 769       GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_size, &nat_size);
 770       GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width (widget, min_size,
 771                                                                      minimum_size, natural_size);
 772     }
 773 }
 774
 775 static void
 776 cell_area_scaffold_get_preferred_width_for_height (GtkWidget       *widget,
 777                                                    gint             for_size,
 778                                                    gint            *minimum_size,
 779                                                    gint            *natural_size)
 780 {
 781   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 782   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 783   GtkOrientation           orientation;
 784
 785   if (!priv->model)
 786     return;
 787
 788   orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area));
 789
 790   if (orientation == GTK_ORIENTATION_VERTICAL)
 791     {
 792       GArray *request_array;
 793       gint    n_rows, i, full_size = 0;
 794
 795       n_rows = gtk_tree_model_iter_n_children (priv->model, NULL);
 796
 797       /* Get an array for the contextual request */
 798       request_array = g_array_new (FALSE, FALSE, sizeof (RowData));
 799       g_array_set_size (request_array, n_rows);
 800       memset (request_array->data, 0x0, n_rows * sizeof (RowData));
 801
 802       /* Gather each contextual size into the request array */
 803       get_row_sizes (scaffold, request_array, for_size - priv->indent);
 804
 805       /* Sum up the size and add some row spacing */
 806       for (i = 0; i < n_rows; i++)
 807         {
 808           RowData *data = &g_array_index (request_array, RowData, i);
 809
 810           full_size += data->size;
 811         }
 812
 813       full_size += MAX (0, n_rows -1) * priv->row_spacing;
 814
 815       g_array_free (request_array, TRUE);
 816
 817       *minimum_size = full_size;
 818       *natural_size = full_size;
 819     }
 820   else
 821     {
 822       GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_size, natural_size);
 823     }
 824 }
 825
 826 static void
 827 cell_area_scaffold_map (GtkWidget       *widget)
 828 {
 829   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 830   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 831
 832   GTK_WIDGET_CLASS (cell_area_scaffold_parent_class)->map (widget);
 833
 834   if (priv->event_window)
 835     gdk_window_show (priv->event_window);
 836 }
 837
 838 static void
 839 cell_area_scaffold_unmap (GtkWidget       *widget)
 840 {
 841   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 842   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 843
 844   GTK_WIDGET_CLASS (cell_area_scaffold_parent_class)->unmap (widget);
 845
 846   if (priv->event_window)
 847     gdk_window_hide (priv->event_window);
 848 }
 849
 850
 851 static gint
 852 cell_area_scaffold_focus (GtkWidget       *widget,
 853                           GtkDirectionType direction)
 854 {
 855   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 856   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 857   GtkTreeIter              iter;
 858   gboolean                 valid;
 859   gint                     focus_row;
 860   GtkOrientation           orientation;
 861   gboolean                 changed = FALSE;
 862
 863   /* Grab focus on ourself if we dont already have focus */
 864   if (!gtk_widget_has_focus (widget))
 865     gtk_widget_grab_focus (widget);
 866
 867   /* Move focus from cell to cell and row to row */
 868   orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area));
 869
 870   focus_row = priv->focus_row;
 871
 872   g_signal_handler_block (priv->area, priv->focus_changed_id);
 873
 874   valid = gtk_tree_model_iter_nth_child (priv->model, &iter, NULL, priv->focus_row);
 875   while (valid)
 876     {
 877       gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
 878
 879       /* If focus stays in the area we dont need to do any more */
 880       if (gtk_cell_area_focus (priv->area, direction))
 881         {
 882           priv->focus_row = focus_row;
 883
 884           /* XXX A smarter implementation would only invalidate the rectangles where
 885            * focus was removed from and new focus was placed */
 886           gtk_widget_queue_draw (widget);
 887           changed = TRUE;
 888           break;
 889         }
 890       else
 891         {
 892           if (orientation == GTK_ORIENTATION_HORIZONTAL)
 893             {
 894               if (direction == GTK_DIR_RIGHT ||
 895                   direction == GTK_DIR_LEFT)
 896                 break;
 897               else if (direction == GTK_DIR_UP ||
 898                        direction == GTK_DIR_TAB_BACKWARD)
 899                 {
 900                   if (focus_row == 0)
 901                     break;
 902                   else
 903                     {
 904                       /* XXX A real implementation should check if the
 905                        * previous row can focus with it's attributes setup */
 906                       focus_row--;
 907                       valid = gtk_tree_model_iter_nth_child (priv->model, &iter, NULL, focus_row);
 908                     }
 909                 }
 910               else /* direction == GTK_DIR_DOWN || GTK_DIR_TAB_FORWARD */
 911                 {
 912                   if (focus_row == priv->row_data->len - 1)
 913                     break;
 914                   else
 915                     {
 916                       /* XXX A real implementation should check if the
 917                        * previous row can focus with it's attributes setup */
 918                       focus_row++;
 919                       valid = gtk_tree_model_iter_next (priv->model, &iter);
 920                     }
 921                 }
 922             }
 923           else  /* (orientation == GTK_ORIENTATION_HORIZONTAL) */
 924             {
 925               if (direction == GTK_DIR_UP ||
 926                   direction == GTK_DIR_DOWN)
 927                 break;
 928               else if (direction == GTK_DIR_LEFT ||
 929                        direction == GTK_DIR_TAB_BACKWARD)
 930                 {
 931                   if (focus_row == 0)
 932                     break;
 933                   else
 934                     {
 935                       /* XXX A real implementation should check if the
 936                        * previous row can focus with it's attributes setup */
 937                       focus_row--;
 938                       valid = gtk_tree_model_iter_nth_child (priv->model, &iter, NULL, focus_row);
 939                     }
 940                 }
 941               else /* direction == GTK_DIR_RIGHT || GTK_DIR_TAB_FORWARD */
 942                 {
 943                   if (focus_row == priv->row_data->len - 1)
 944                     break;
 945                   else
 946                     {
 947                       /* XXX A real implementation should check if the
 948                        * previous row can focus with it's attributes setup */
 949                       focus_row++;
 950                       valid = gtk_tree_model_iter_next (priv->model, &iter);
 951                     }
 952                 }
 953             }
 954         }
 955     }
 956
 957   g_signal_handler_unblock (priv->area, priv->focus_changed_id);
 958
 959   /* XXX A smarter implementation would only invalidate the rectangles where
 960    * focus was removed from and new focus was placed */
 961   gtk_widget_queue_draw (widget);
 962
 963   return changed;
 964 }
 965
 966 static gboolean
 967 cell_area_scaffold_button_press (GtkWidget       *widget,
 968                                  GdkEventButton  *event)
 969 {
 970   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 971   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 972   GtkTreeIter              iter;
 973   gboolean                 valid;
 974   GtkOrientation           orientation;
 975   gint                     i = 0;
 976   GdkRectangle             event_area;
 977   GtkAllocation            allocation;
 978   gboolean                 handled = FALSE;
 979
 980   /* Move focus from cell to cell and row to row */
 981   orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area));
 982
 983   gtk_widget_get_allocation (widget, &allocation);
 984
 985   event_area.x      = 0;
 986   event_area.y      = 0;
 987   event_area.width  = allocation.width;
 988   event_area.height = allocation.height;
 989
 990   if (orientation == GTK_ORIENTATION_HORIZONTAL)
 991     {
 992       event_area.x      = priv->indent;
 993       event_area.width -= priv->indent;
 994     }
 995   else
 996     {
 997       event_area.y       = priv->indent;
 998       event_area.height -= priv->indent;
 999     }
1000
1001   valid = gtk_tree_model_get_iter_first (priv->model, &iter);
1002   while (valid)
1003     {
1004       RowData *data = &g_array_index (priv->row_data, RowData, i);
1005
1006       if (orientation == GTK_ORIENTATION_HORIZONTAL)
1007         {
1008           event_area.height = data->size;
1009
1010           if (event->y >= event_area.y &&
1011               event->y <= event_area.y + event_area.height)
1012             {
1013               /* XXX A real implementation would assemble GtkCellRendererState flags here */
1014               gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
1015               handled = gtk_cell_area_event (priv->area, priv->context, GTK_WIDGET (scaffold),
1016                                              (GdkEvent *)event, &event_area, 0);
1017               break;
1018             }
1019
1020           event_area.y += data->size;
1021           event_area.y += priv->row_spacing;
1022         }
1023       else
1024         {
1025           event_area.width = data->size;
1026
1027           if (event->x >= event_area.x &&
1028               event->x <= event_area.x + event_area.width)
1029             {
1030               /* XXX A real implementation would assemble GtkCellRendererState flags here */
1031               gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
1032               handled = gtk_cell_area_event (priv->area, priv->context, GTK_WIDGET (scaffold),
1033                                              (GdkEvent *)event, &event_area, 0);
1034               break;
1035             }
1036
1037           event_area.x += data->size;
1038           event_area.x += priv->row_spacing;
1039         }
1040
1041       i++;
1042       valid = gtk_tree_model_iter_next (priv->model, &iter);
1043     }
1044
1045   return handled;
1046 }
1047
1048
1049 /*********************************************************
1050  *                   GtkContainerClass                   *
1051  *********************************************************/
1052 static void
1053 cell_area_scaffold_put_edit_widget (CellAreaScaffold *scaffold,
1054                                     GtkWidget        *edit_widget,
1055                                     gint              x,
1056                                     gint              y,
1057                                     gint              width,
1058                                     gint              height)
1059 {
1060   CellAreaScaffoldPrivate *priv = scaffold->priv;
1061
1062   priv->edit_rect.x      = x;
1063   priv->edit_rect.y      = y;
1064   priv->edit_rect.width  = width;
1065   priv->edit_rect.height = height;
1066   priv->edit_widget      = edit_widget;
1067
1068   gtk_widget_set_parent (edit_widget, GTK_WIDGET (scaffold));
1069 }
1070
1071 static void
1072 cell_area_scaffold_forall (GtkContainer    *container,
1073                            gboolean         include_internals,
1074                            GtkCallback      callback,
1075                            gpointer         callback_data)
1076 {
1077   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (container);
1078   CellAreaScaffoldPrivate *priv     = scaffold->priv;
1079
1080   if (priv->edit_widget)
1081     (* callback) (priv->edit_widget, callback_data);
1082 }
1083
1084 static void
1085 cell_area_scaffold_remove (GtkContainer    *container,
1086                            GtkWidget       *child)
1087 {
1088   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (container);
1089   CellAreaScaffoldPrivate *priv     = scaffold->priv;
1090
1091   g_return_if_fail (child == priv->edit_widget);
1092
1093   gtk_widget_unparent (priv->edit_widget);
1094   priv->edit_widget = NULL;
1095 }
1096
1097 /*********************************************************
1098  *                CellAreaScaffoldClass                  *
1099  *********************************************************/
1100 static void
1101 cell_area_scaffold_activate (CellAreaScaffold *scaffold)
1102 {
1103   CellAreaScaffoldPrivate *priv     = scaffold->priv;
1104   GtkWidget               *widget   = GTK_WIDGET (scaffold);
1105   GtkAllocation            allocation;
1106   GtkOrientation           orientation;
1107   GdkRectangle             cell_area;
1108   GtkTreeIter              iter;
1109   gboolean                 valid;
1110   gint                     i = 0;
1111
1112   orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (priv->area));
1113   gtk_widget_get_allocation (widget, &allocation);
1114
1115   cell_area.x = 0;
1116   cell_area.y = 0;
1117   cell_area.width  = allocation.width;
1118   cell_area.height = allocation.height;
1119
1120   if (orientation == GTK_ORIENTATION_HORIZONTAL)
1121     {
1122       cell_area.x      = priv->indent;
1123       cell_area.width -= priv->indent;
1124     }
1125   else
1126     {
1127       cell_area.y       = priv->indent;
1128       cell_area.height -= priv->indent;
1129     }
1130
1131   valid = gtk_tree_model_get_iter_first (priv->model, &iter);
1132   while (valid)
1133     {
1134       RowData *data = &g_array_index (priv->row_data, RowData, i);
1135
1136       if (i == priv->focus_row)
1137         {
1138           if (orientation == GTK_ORIENTATION_HORIZONTAL)
1139             cell_area.height = data->size;
1140           else
1141             cell_area.width = data->size;
1142
1143           gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
1144           gtk_cell_area_activate (priv->area, priv->context, widget, &cell_area, GTK_CELL_RENDERER_FOCUSED);
1145
1146           break;
1147         }
1148
1149       if (orientation == GTK_ORIENTATION_HORIZONTAL)
1150         cell_area.y += data->size + priv->row_spacing;
1151       else
1152         cell_area.x += data->size + priv->row_spacing;
1153
1154       i++;
1155       valid = gtk_tree_model_iter_next (priv->model, &iter);
1156     }
1157 }
1158
1159 /*********************************************************
1160  *           CellArea/GtkTreeModel callbacks             *
1161  *********************************************************/
1162 static void
1163 size_changed_cb (GtkCellAreaContext  *context,
1164                  GParamSpec          *pspec,
1165                  CellAreaScaffold    *scaffold)
1166 {
1167   if (!strcmp (pspec->name, "minimum-width") ||
1168       !strcmp (pspec->name, "natural-width") ||
1169       !strcmp (pspec->name, "minimum-height") ||
1170       !strcmp (pspec->name, "natural-height"))
1171     gtk_widget_queue_resize (GTK_WIDGET (scaffold));
1172 }
1173
1174 static void
1175 focus_changed_cb (GtkCellArea      *area,
1176                   GtkCellRenderer  *renderer,
1177                   const gchar      *path,
1178                   CellAreaScaffold *scaffold)
1179 {
1180   CellAreaScaffoldPrivate *priv = scaffold->priv;
1181   GtkWidget               *widget = GTK_WIDGET (scaffold);
1182   GtkTreePath             *treepath;
1183   gint                    *indices;
1184
1185   if (!priv->model)
1186     return;
1187
1188   /* We can be signaled that a renderer lost focus, here
1189    * we dont care */
1190   if (!renderer)
1191     return;
1192
1193   treepath = gtk_tree_path_new_from_string (path);
1194   indices = gtk_tree_path_get_indices (treepath);
1195
1196   priv->focus_row = indices[0];
1197
1198   gtk_tree_path_free (treepath);
1199
1200   /* Make sure we have focus now */
1201   if (!gtk_widget_has_focus (widget))
1202     gtk_widget_grab_focus (widget);
1203
1204   gtk_widget_queue_draw (widget);
1205 }
1206
1207 static void
1208 add_editable_cb (GtkCellArea      *area,
1209                  GtkCellRenderer  *renderer,
1210                  GtkCellEditable  *edit_widget,
1211                  GdkRectangle     *cell_area,
1212                  const gchar      *path,
1213                  CellAreaScaffold *scaffold)
1214 {
1215   GtkAllocation allocation;
1216
1217   gtk_widget_get_allocation (GTK_WIDGET (scaffold), &allocation);
1218
1219   cell_area_scaffold_put_edit_widget (scaffold, GTK_WIDGET (edit_widget),
1220                                       allocation.x + cell_area->x,
1221                                       allocation.y + cell_area->y,
1222                                       cell_area->width, cell_area->height);
1223 }
1224
1225 static void
1226 remove_editable_cb (GtkCellArea      *area,
1227                     GtkCellRenderer  *renderer,
1228                     GtkCellEditable  *edit_widget,
1229                     CellAreaScaffold *scaffold)
1230 {
1231   gtk_container_remove (GTK_CONTAINER (scaffold), GTK_WIDGET (edit_widget));
1232
1233   gtk_widget_grab_focus (GTK_WIDGET (scaffold));
1234 }
1235
1236 static void
1237 rebuild_and_reset_internals (CellAreaScaffold *scaffold)
1238 {
1239   CellAreaScaffoldPrivate *priv = scaffold->priv;
1240   gint n_rows;
1241
1242   if (priv->model)
1243     {
1244       n_rows = gtk_tree_model_iter_n_children (priv->model, NULL);
1245
1246       /* Clear/reset the array */
1247       g_array_set_size (priv->row_data, n_rows);
1248       memset (priv->row_data->data, 0x0, n_rows * sizeof (RowData));
1249     }
1250   else
1251     g_array_set_size (priv->row_data, 0);
1252
1253   /* Data changed, lets reset the context and consequently queue resize and
1254    * start everything over again (note this is definitly far from optimized) */
1255   gtk_cell_area_context_reset (priv->context);
1256 }
1257
1258 static void
1259 row_changed_cb (GtkTreeModel     *model,
1260                 GtkTreePath      *path,
1261                 GtkTreeIter      *iter,
1262                 CellAreaScaffold *scaffold)
1263 {
1264   rebuild_and_reset_internals (scaffold);
1265 }
1266
1267 static void
1268 row_inserted_cb (GtkTreeModel     *model,
1269                  GtkTreePath      *path,
1270                  GtkTreeIter      *iter,
1271                  CellAreaScaffold *scaffold)
1272 {
1273   rebuild_and_reset_internals (scaffold);
1274 }
1275
1276 static void
1277 row_deleted_cb (GtkTreeModel     *model,
1278                 GtkTreePath      *path,
1279                 CellAreaScaffold *scaffold)
1280 {
1281   rebuild_and_reset_internals (scaffold);
1282 }
1283
1284 static void
1285 rows_reordered_cb (GtkTreeModel     *model,
1286                    GtkTreePath      *parent,
1287                    GtkTreeIter      *iter,
1288                    gint             *new_order,
1289                    CellAreaScaffold *scaffold)
1290 {
1291   rebuild_and_reset_internals (scaffold);
1292 }
1293
1294 /*********************************************************
1295  *                         API                           *
1296  *********************************************************/
1297 GtkWidget *
1298 cell_area_scaffold_new (void)
1299 {
1300   return (GtkWidget *)g_object_new (TYPE_CELL_AREA_SCAFFOLD, NULL);
1301 }
1302
1303 GtkCellArea  *
1304 cell_area_scaffold_get_area (CellAreaScaffold *scaffold)
1305 {
1306   CellAreaScaffoldPrivate *priv;
1307
1308   g_return_val_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold), NULL);
1309
1310   priv = scaffold->priv;
1311
1312   return priv->area;
1313 }
1314
1315 void
1316 cell_area_scaffold_set_model (CellAreaScaffold *scaffold,
1317                               GtkTreeModel     *model)
1318 {
1319   CellAreaScaffoldPrivate *priv;
1320
1321   g_return_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold));
1322
1323   priv = scaffold->priv;
1324
1325   if (priv->model != model)
1326     {
1327       if (priv->model)
1328         {
1329           g_signal_handler_disconnect (priv->model, priv->row_changed_id);
1330           g_signal_handler_disconnect (priv->model, priv->row_inserted_id);
1331           g_signal_handler_disconnect (priv->model, priv->row_deleted_id);
1332           g_signal_handler_disconnect (priv->model, priv->rows_reordered_id);
1333
1334           g_object_unref (priv->model);
1335         }
1336
1337       priv->model = model;
1338
1339       if (priv->model)
1340         {
1341           g_object_ref (priv->model);
1342
1343           priv->row_changed_id =
1344             g_signal_connect (priv->model, "row-changed",
1345                               G_CALLBACK (row_changed_cb), scaffold);
1346
1347           priv->row_inserted_id =
1348             g_signal_connect (priv->model, "row-inserted",
1349                               G_CALLBACK (row_inserted_cb), scaffold);
1350
1351           priv->row_deleted_id =
1352             g_signal_connect (priv->model, "row-deleted",
1353                               G_CALLBACK (row_deleted_cb), scaffold);
1354
1355           priv->rows_reordered_id =
1356             g_signal_connect (priv->model, "rows-reordered",
1357                               G_CALLBACK (rows_reordered_cb), scaffold);
1358         }
1359
1360       rebuild_and_reset_internals (scaffold);
1361     }
1362 }
1363
1364 GtkTreeModel *
1365 cell_area_scaffold_get_model (CellAreaScaffold *scaffold)
1366 {
1367   CellAreaScaffoldPrivate *priv;
1368
1369   g_return_val_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold), NULL);
1370
1371   priv = scaffold->priv;
1372
1373   return priv->model;
1374 }
1375
1376
1377 void
1378 cell_area_scaffold_set_row_spacing (CellAreaScaffold *scaffold,
1379                                     gint              spacing)
1380 {
1381   CellAreaScaffoldPrivate *priv;
1382
1383   g_return_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold));
1384
1385   priv = scaffold->priv;
1386
1387   if (priv->row_spacing != spacing)
1388     {
1389       priv->row_spacing = spacing;
1390       gtk_widget_queue_resize (GTK_WIDGET (scaffold));
1391     }
1392 }
1393
1394 gint
1395 cell_area_scaffold_get_row_spacing (CellAreaScaffold *scaffold)
1396 {
1397   CellAreaScaffoldPrivate *priv;
1398
1399   g_return_val_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold), 0);
1400
1401   priv = scaffold->priv;
1402
1403   return priv->row_spacing;
1404 }
1405
1406 void
1407 cell_area_scaffold_set_indentation (CellAreaScaffold *scaffold,
1408                                     gint              indent)
1409 {
1410   CellAreaScaffoldPrivate *priv;
1411
1412   g_return_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold));
1413
1414   priv = scaffold->priv;
1415
1416   if (priv->indent != indent)
1417     {
1418       priv->indent = indent;
1419       gtk_widget_queue_resize (GTK_WIDGET (scaffold));
1420     }
1421 }
1422
1423 gint
1424 cell_area_scaffold_get_indentation (CellAreaScaffold *scaffold)
1425 {
1426   CellAreaScaffoldPrivate *priv;
1427
1428   g_return_val_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold), 0);
1429
1430   priv = scaffold->priv;
1431
1432   return priv->indent;
1433 }
1434
1435