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
  31 /* GtkWidgetClass */
  32 static void      cell_area_scaffold_realize                        (GtkWidget       *widget);
  33 static void      cell_area_scaffold_unrealize                      (GtkWidget       *widget);
  34 static gboolean  cell_area_scaffold_draw                           (GtkWidget       *widget,
  35                                                                     cairo_t         *cr);
  36 static void      cell_area_scaffold_size_allocate                  (GtkWidget       *widget,
  37                                                                     GtkAllocation   *allocation);
  38 static void      cell_area_scaffold_get_preferred_width            (GtkWidget       *widget,
  39                                                                     gint            *minimum_size,
  40                                                                     gint            *natural_size);
  41 static void      cell_area_scaffold_get_preferred_height_for_width (GtkWidget       *widget,
  42                                                                     gint             for_size,
  43                                                                     gint            *minimum_size,
  44                                                                     gint            *natural_size);
  45 static void      cell_area_scaffold_get_preferred_height           (GtkWidget       *widget,
  46                                                                     gint            *minimum_size,
  47                                                                     gint            *natural_size);
  48 static void      cell_area_scaffold_get_preferred_width_for_height (GtkWidget       *widget,
  49                                                                     gint             for_size,
  50                                                                     gint            *minimum_size,
  51                                                                     gint            *natural_size);
  52 static void      cell_area_scaffold_map                            (GtkWidget       *widget);
  53 static void      cell_area_scaffold_unmap                          (GtkWidget       *widget);
  54 static gint      cell_area_scaffold_focus                          (GtkWidget       *widget,
  55                                                                     GtkDirectionType direction);
  56 static gboolean  cell_area_scaffold_button_press                   (GtkWidget       *widget,
  57                                                                     GdkEventButton  *event);
  58
  59 /* GtkContainerClass */
  60 static void      cell_area_scaffold_forall                         (GtkContainer    *container,
  61                                                                     gboolean         include_internals,
  62                                                                     GtkCallback      callback,
  63                                                                     gpointer         callback_data);
  64 static void      cell_area_scaffold_remove                         (GtkContainer    *container,
  65                                                                     GtkWidget       *child);
  66 static void      cell_area_scaffold_put_edit_widget                (CellAreaScaffold *scaffold,
  67                                                                     GtkWidget        *edit_widget,
  68                                                                     gint              x,
  69                                                                     gint              y,
  70                                                                     gint              width,
  71                                                                     gint              height);
  72
  73 /* CellAreaScaffoldClass */
  74 static void      cell_area_scaffold_activate                       (CellAreaScaffold *scaffold);
  75
  76 /* CellArea/GtkTreeModel callbacks */
  77 static void      size_changed_cb                                   (GtkCellAreaContext *context,
  78                                                                     GParamSpec       *pspec,
  79                                                                     CellAreaScaffold *scaffold);
  80 static void      focus_changed_cb                                  (GtkCellArea      *area,
  81                                                                     GtkCellRenderer  *renderer,
  82                                                                     const gchar      *path,
  83                                                                     CellAreaScaffold *scaffold);
  84 static void      add_editable_cb                                   (GtkCellArea      *area,
  85                                                                     GtkCellRenderer  *renderer,
  86                                                                     GtkCellEditable  *edit_widget,
  87                                                                     GdkRectangle     *cell_area,
  88                                                                     const gchar      *path,
  89                                                                     CellAreaScaffold *scaffold);
  90 static void      remove_editable_cb                                (GtkCellArea      *area,
  91                                                                     GtkCellRenderer  *renderer,
  92                                                                     GtkCellEditable  *edit_widget,
  93                                                                     CellAreaScaffold *scaffold);
  94 static void      row_changed_cb                                    (GtkTreeModel     *model,
  95                                                                     GtkTreePath      *path,
  96                                                                     GtkTreeIter      *iter,
  97                                                                     CellAreaScaffold *scaffold);
  98 static void      row_inserted_cb                                   (GtkTreeModel     *model,
  99                                                                     GtkTreePath      *path,
 100                                                                     GtkTreeIter      *iter,
 101                                                                     CellAreaScaffold *scaffold);
 102 static void      row_deleted_cb                                    (GtkTreeModel     *model,
 103                                                                     GtkTreePath      *path,
 104                                                                     CellAreaScaffold *scaffold);
 105 static void      rows_reordered_cb                                 (GtkTreeModel     *model,
 106                                                                     GtkTreePath      *parent,
 107                                                                     GtkTreeIter      *iter,
 108                                                                     gint             *new_order,
 109                                                                     CellAreaScaffold *scaffold);
 110
 111 typedef struct {
 112   gint    size; /* The height of rows in the scaffold's */
 113 } RowData;
 114
 115 struct _CellAreaScaffoldPrivate {
 116
 117   /* Window for catching events and dispatching them to the cell area */
 118   GdkWindow       *event_window;
 119
 120   /* The model we're showing data for */
 121   GtkTreeModel    *model;
 122   gulong           row_changed_id;
 123   gulong           row_inserted_id;
 124   gulong           row_deleted_id;
 125   gulong           rows_reordered_id;
 126
 127   /* The area rendering the data and a global context */
 128   GtkCellArea        *area;
 129   GtkCellAreaContext *context;
 130
 131   /* Cache some info about rows (hieghts etc) */
 132   GArray          *row_data;
 133
 134   /* Focus handling */
 135   gint             focus_row;
 136   gulong           focus_changed_id;
 137
 138   /* Check when the underlying area changes the size and
 139    * we need to queue a redraw */
 140   gulong           size_changed_id;
 141
 142   /* Currently edited widget */
 143   GtkWidget       *edit_widget;
 144   GdkRectangle     edit_rect;
 145   gulong           add_editable_id;
 146   gulong           remove_editable_id;
 147
 148
 149   gint             row_spacing;
 150   gint             indent;
 151 };
 152
 153 enum {
 154   ACTIVATE,
 155   N_SIGNALS
 156 };
 157
 158 static guint scaffold_signals[N_SIGNALS] = { 0 };
 159
 160 #define DIRECTION_STR(dir)                              \
 161   ((dir) == GTK_DIR_TAB_FORWARD  ? "tab forward" :      \
 162    (dir) == GTK_DIR_TAB_BACKWARD ? "tab backward" :     \
 163    (dir) == GTK_DIR_UP           ? "up" :               \
 164    (dir) == GTK_DIR_DOWN         ? "down" :             \
 165    (dir) == GTK_DIR_LEFT         ? "left" :             \
 166    (dir) == GTK_DIR_RIGHT        ? "right" : "invalid")
 167
 168 G_DEFINE_TYPE_WITH_CODE (CellAreaScaffold, cell_area_scaffold, GTK_TYPE_CONTAINER,
 169                          G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL));
 170
 171
 172 static void
 173 cell_area_scaffold_init (CellAreaScaffold *scaffold)
 174 {
 175   CellAreaScaffoldPrivate *priv;
 176
 177   scaffold->priv = G_TYPE_INSTANCE_GET_PRIVATE (scaffold,
 178                                                 TYPE_CELL_AREA_SCAFFOLD,
 179                                                 CellAreaScaffoldPrivate);
 180   priv = scaffold->priv;
 181
 182   priv->area    = gtk_cell_area_box_new ();
 183   priv->context = gtk_cell_area_create_context (priv->area);
 184
 185   priv->row_data = g_array_new (FALSE, FALSE, sizeof (RowData));
 186
 187   gtk_widget_set_has_window (GTK_WIDGET (scaffold), FALSE);
 188   gtk_widget_set_can_focus (GTK_WIDGET (scaffold), TRUE);
 189
 190   priv->size_changed_id =
 191     g_signal_connect (priv->context, "notify",
 192                       G_CALLBACK (size_changed_cb), scaffold);
 193
 194   priv->focus_changed_id =
 195     g_signal_connect (priv->area, "focus-changed",
 196                       G_CALLBACK (focus_changed_cb), scaffold);
 197
 198   priv->add_editable_id =
 199     g_signal_connect (priv->area, "add-editable",
 200                       G_CALLBACK (add_editable_cb), scaffold);
 201
 202   priv->remove_editable_id =
 203     g_signal_connect (priv->area, "remove-editable",
 204                       G_CALLBACK (remove_editable_cb), scaffold);
 205 }
 206
 207 static void
 208 cell_area_scaffold_class_init (CellAreaScaffoldClass *class)
 209 {
 210   GObjectClass      *gobject_class;
 211   GtkWidgetClass    *widget_class;
 212   GtkContainerClass *container_class;
 213
 214   gobject_class = G_OBJECT_CLASS (class);
 215   gobject_class->dispose = cell_area_scaffold_dispose;
 216   gobject_class->finalize = cell_area_scaffold_finalize;
 217
 218   widget_class = GTK_WIDGET_CLASS (class);
 219   widget_class->realize = cell_area_scaffold_realize;
 220   widget_class->unrealize = cell_area_scaffold_unrealize;
 221   widget_class->draw = cell_area_scaffold_draw;
 222   widget_class->size_allocate = cell_area_scaffold_size_allocate;
 223   widget_class->get_preferred_width = cell_area_scaffold_get_preferred_width;
 224   widget_class->get_preferred_height_for_width = cell_area_scaffold_get_preferred_height_for_width;
 225   widget_class->get_preferred_height = cell_area_scaffold_get_preferred_height;
 226   widget_class->get_preferred_width_for_height = cell_area_scaffold_get_preferred_width_for_height;
 227   widget_class->map = cell_area_scaffold_map;
 228   widget_class->unmap = cell_area_scaffold_unmap;
 229   widget_class->focus = cell_area_scaffold_focus;
 230   widget_class->button_press_event = cell_area_scaffold_button_press;
 231
 232   container_class = GTK_CONTAINER_CLASS (class);
 233   container_class->forall = cell_area_scaffold_forall;
 234   container_class->remove = cell_area_scaffold_remove;
 235
 236   class->activate = cell_area_scaffold_activate;
 237
 238   scaffold_signals[ACTIVATE] =
 239     g_signal_new ("activate",
 240                   G_OBJECT_CLASS_TYPE (gobject_class),
 241                   G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
 242                   G_STRUCT_OFFSET (CellAreaScaffoldClass, activate),
 243                   NULL, NULL,
 244                   g_cclosure_marshal_VOID__VOID,
 245                   G_TYPE_NONE, 0);
 246   widget_class->activate_signal = scaffold_signals[ACTIVATE];
 247
 248
 249   g_type_class_add_private (gobject_class, sizeof (CellAreaScaffoldPrivate));
 250 }
 251
 252 /*********************************************************
 253  *                    GObjectClass                       *
 254  *********************************************************/
 255 static void
 256 cell_area_scaffold_finalize (GObject *object)
 257 {
 258   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (object);
 259   CellAreaScaffoldPrivate *priv;
 260
 261   priv = scaffold->priv;
 262
 263   g_array_free (priv->row_data, TRUE);
 264
 265   G_OBJECT_CLASS (cell_area_scaffold_parent_class)->finalize (object);
 266 }
 267
 268 static void
 269 cell_area_scaffold_dispose (GObject *object)
 270 {
 271   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (object);
 272   CellAreaScaffoldPrivate *priv;
 273
 274   priv = scaffold->priv;
 275
 276   cell_area_scaffold_set_model (scaffold, NULL);
 277
 278   if (priv->context)
 279     {
 280       /* Disconnect signals */
 281       g_signal_handler_disconnect (priv->context, priv->size_changed_id);
 282
 283       g_object_unref (priv->context);
 284       priv->context = NULL;
 285       priv->size_changed_id = 0;
 286     }
 287
 288   if (priv->area)
 289     {
 290       /* Disconnect signals */
 291       g_signal_handler_disconnect (priv->area, priv->focus_changed_id);
 292       g_signal_handler_disconnect (priv->area, priv->add_editable_id);
 293       g_signal_handler_disconnect (priv->area, priv->remove_editable_id);
 294
 295       g_object_unref (priv->area);
 296       priv->area = NULL;
 297       priv->focus_changed_id = 0;
 298     }
 299
 300   G_OBJECT_CLASS (cell_area_scaffold_parent_class)->dispose (object);
 301 }
 302
 303 /*********************************************************
 304  *                    GtkWidgetClass                     *
 305  *********************************************************/
 306 static void
 307 cell_area_scaffold_realize (GtkWidget *widget)
 308 {
 309   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 310   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 311   GtkAllocation            allocation;
 312   GdkWindow               *window;
 313   GdkWindowAttr            attributes;
 314   gint                     attributes_mask;
 315
 316   gtk_widget_get_allocation (widget, &allocation);
 317
 318   gtk_widget_set_realized (widget, TRUE);
 319
 320   attributes.window_type = GDK_WINDOW_CHILD;
 321   attributes.x = allocation.x;
 322   attributes.y = allocation.y;
 323   attributes.width = allocation.width;
 324   attributes.height = allocation.height;
 325   attributes.wclass = GDK_INPUT_ONLY;
 326   attributes.event_mask = gtk_widget_get_events (widget);
 327   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
 328                             GDK_BUTTON_RELEASE_MASK |
 329                             GDK_KEY_PRESS_MASK |
 330                             GDK_KEY_RELEASE_MASK);
 331
 332   attributes_mask = GDK_WA_X | GDK_WA_Y;
 333
 334   window = gtk_widget_get_parent_window (widget);
 335   gtk_widget_set_window (widget, window);
 336   g_object_ref (window);
 337
 338   priv->event_window = gdk_window_new (window, &attributes, attributes_mask);
 339   gdk_window_set_user_data (priv->event_window, widget);
 340 }
 341
 342 static void
 343 cell_area_scaffold_unrealize (GtkWidget *widget)
 344 {
 345   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 346   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 347
 348   if (priv->event_window)
 349     {
 350       gdk_window_set_user_data (priv->event_window, NULL);
 351       gdk_window_destroy (priv->event_window);
 352       priv->event_window = NULL;
 353     }
 354
 355   GTK_WIDGET_CLASS (cell_area_scaffold_parent_class)->unrealize (widget);
 356 }
 357
 358 static gboolean
 359 cell_area_scaffold_draw (GtkWidget       *widget,
 360                          cairo_t         *cr)
 361 {
 362   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 363   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 364   GtkTreeIter              iter;
 365   gboolean                 valid;
 366   GdkRectangle             background_area;
 367   GdkRectangle             render_area;
 368   GtkAllocation            allocation;
 369   gint                     i = 0;
 370   gboolean                 have_focus;
 371   GtkCellRendererState     flags;
 372
 373   if (!priv->model)
 374     return FALSE;
 375
 376   have_focus  = gtk_widget_has_focus (widget);
 377
 378   gtk_widget_get_allocation (widget, &allocation);
 379
 380   render_area.x      = 0;
 381   render_area.y      = 0;
 382   render_area.width  = allocation.width;
 383   render_area.height = allocation.height;
 384
 385   background_area = render_area;
 386
 387   render_area.x      = priv->indent;
 388   render_area.width -= priv->indent;
 389
 390   valid = gtk_tree_model_get_iter_first (priv->model, &iter);
 391   while (valid)
 392     {
 393       RowData *data = &g_array_index (priv->row_data, RowData, i);
 394
 395       if (have_focus && i == priv->focus_row)
 396         flags = GTK_CELL_RENDERER_FOCUSED;
 397       else
 398         flags = 0;
 399
 400       render_area.height     = data->size;
 401
 402       background_area.height = render_area.height;
 403       background_area.y      = render_area.y;
 404
 405       if (i == 0)
 406         {
 407           background_area.height += priv->row_spacing / 2;
 408           background_area.height += priv->row_spacing % 2;
 409         }
 410       else if (i == priv->row_data->len - 1)
 411         {
 412           background_area.y      -= priv->row_spacing / 2;
 413           background_area.height += priv->row_spacing / 2;
 414         }
 415       else
 416         {
 417           background_area.y      -= priv->row_spacing / 2;
 418           background_area.height += priv->row_spacing;
 419         }
 420
 421       gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
 422       gtk_cell_area_render (priv->area, priv->context, widget, cr,
 423                             &background_area, &render_area, flags,
 424                             (have_focus && i == priv->focus_row));
 425
 426       render_area.y += data->size;
 427       render_area.y += priv->row_spacing;
 428
 429       i++;
 430       valid = gtk_tree_model_iter_next (priv->model, &iter);
 431     }
 432
 433   /* Draw the edit widget after drawing everything else */
 434   GTK_WIDGET_CLASS (cell_area_scaffold_parent_class)->draw (widget, cr);
 435
 436   return FALSE;
 437 }
 438
 439 static void
 440 request_all_base (CellAreaScaffold *scaffold)
 441 {
 442   CellAreaScaffoldPrivate *priv = scaffold->priv;
 443   GtkWidget               *widget = GTK_WIDGET (scaffold);
 444   GtkTreeIter              iter;
 445   gboolean                 valid;
 446
 447   if (!priv->model)
 448     return;
 449
 450   g_signal_handler_block (priv->context, priv->size_changed_id);
 451
 452   valid = gtk_tree_model_get_iter_first (priv->model, &iter);
 453   while (valid)
 454     {
 455       gint min, nat;
 456
 457       gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
 458       gtk_cell_area_get_preferred_width (priv->area, priv->context, widget, &min, &nat);
 459
 460       valid = gtk_tree_model_iter_next (priv->model, &iter);
 461     }
 462
 463   g_signal_handler_unblock (priv->context, priv->size_changed_id);
 464 }
 465
 466 static void
 467 get_row_sizes (CellAreaScaffold *scaffold,
 468                GArray           *array,
 469                gint              for_size)
 470 {
 471   CellAreaScaffoldPrivate *priv = scaffold->priv;
 472   GtkWidget               *widget = GTK_WIDGET (scaffold);
 473   GtkTreeIter              iter;
 474   gboolean                 valid;
 475   gint                     i = 0;
 476
 477   if (!priv->model)
 478     return;
 479
 480   valid = gtk_tree_model_get_iter_first (priv->model, &iter);
 481   while (valid)
 482     {
 483       RowData *data = &g_array_index (array, RowData, i);
 484
 485       gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
 486       gtk_cell_area_get_preferred_height_for_width (priv->area, priv->context, widget,
 487                                                     for_size, &data->size, NULL);
 488
 489       i++;
 490       valid = gtk_tree_model_iter_next (priv->model, &iter);
 491     }
 492 }
 493
 494 static void
 495 cell_area_scaffold_size_allocate (GtkWidget           *widget,
 496                                   GtkAllocation       *allocation)
 497 {
 498   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 499   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 500
 501   gtk_widget_set_allocation (widget, allocation);
 502
 503   if (gtk_widget_get_realized (widget))
 504     gdk_window_move_resize (priv->event_window,
 505                             allocation->x,
 506                             allocation->y,
 507                             allocation->width,
 508                             allocation->height);
 509
 510   /* Allocate the child GtkCellEditable widget if one is currently editing a row */
 511   if (priv->edit_widget)
 512     gtk_widget_size_allocate (priv->edit_widget, &priv->edit_rect);
 513
 514   if (!priv->model)
 515     return;
 516
 517   /* Cache the per-row sizes and allocate the context */
 518   gtk_cell_area_context_allocate (priv->context, allocation->width - priv->indent, -1);
 519   get_row_sizes (scaffold, priv->row_data, allocation->width - priv->indent);
 520 }
 521
 522
 523 static void
 524 cell_area_scaffold_get_preferred_width (GtkWidget       *widget,
 525                                         gint            *minimum_size,
 526                                         gint            *natural_size)
 527 {
 528   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 529   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 530
 531   if (!priv->model)
 532     return;
 533
 534   request_all_base (scaffold);
 535   gtk_cell_area_context_get_preferred_width (priv->context, minimum_size, natural_size);
 536
 537   *minimum_size += priv->indent;
 538   *natural_size += priv->indent;
 539 }
 540
 541 static void
 542 cell_area_scaffold_get_preferred_height_for_width (GtkWidget       *widget,
 543                                                    gint             for_size,
 544                                                    gint            *minimum_size,
 545                                                    gint            *natural_size)
 546 {
 547   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 548   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 549   GArray                  *request_array;
 550   gint                     n_rows, i, full_size = 0;
 551
 552   if (!priv->model)
 553     return;
 554
 555   n_rows = gtk_tree_model_iter_n_children (priv->model, NULL);
 556
 557   /* Get an array for the contextual request */
 558   request_array = g_array_new (FALSE, FALSE, sizeof (RowData));
 559   g_array_set_size (request_array, n_rows);
 560   memset (request_array->data, 0x0, n_rows * sizeof (RowData));
 561
 562   /* Gather each contextual size into the request array */
 563   get_row_sizes (scaffold, request_array, for_size - priv->indent);
 564
 565   /* Sum up the size and add some row spacing */
 566   for (i = 0; i < n_rows; i++)
 567     {
 568       RowData *data = &g_array_index (request_array, RowData, i);
 569
 570       full_size += data->size;
 571     }
 572
 573   full_size += MAX (0, n_rows -1) * priv->row_spacing;
 574
 575   g_array_free (request_array, TRUE);
 576
 577   *minimum_size = full_size;
 578   *natural_size = full_size;
 579 }
 580
 581 static void
 582 cell_area_scaffold_get_preferred_height (GtkWidget       *widget,
 583                                          gint            *minimum_size,
 584                                          gint            *natural_size)
 585 {
 586   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 587   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 588   gint                     min_size, nat_size;
 589
 590   if (!priv->model)
 591     return;
 592
 593   GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_size, &nat_size);
 594   GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width (widget, min_size,
 595                                                                  minimum_size, natural_size);
 596 }
 597
 598 static void
 599 cell_area_scaffold_get_preferred_width_for_height (GtkWidget       *widget,
 600                                                    gint             for_size,
 601                                                    gint            *minimum_size,
 602                                                    gint            *natural_size)
 603 {
 604   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 605   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 606
 607   if (!priv->model)
 608     return;
 609
 610   GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_size, natural_size);
 611 }
 612
 613 static void
 614 cell_area_scaffold_map (GtkWidget       *widget)
 615 {
 616   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 617   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 618
 619   GTK_WIDGET_CLASS (cell_area_scaffold_parent_class)->map (widget);
 620
 621   if (priv->event_window)
 622     gdk_window_show (priv->event_window);
 623 }
 624
 625 static void
 626 cell_area_scaffold_unmap (GtkWidget       *widget)
 627 {
 628   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 629   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 630
 631   GTK_WIDGET_CLASS (cell_area_scaffold_parent_class)->unmap (widget);
 632
 633   if (priv->event_window)
 634     gdk_window_hide (priv->event_window);
 635 }
 636
 637
 638 static gint
 639 cell_area_scaffold_focus (GtkWidget       *widget,
 640                           GtkDirectionType direction)
 641 {
 642   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 643   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 644   GtkTreeIter              iter;
 645   gboolean                 valid;
 646   gint                     focus_row;
 647   gboolean                 changed = FALSE;
 648
 649   /* Grab focus on ourself if we dont already have focus */
 650   if (!gtk_widget_has_focus (widget))
 651     gtk_widget_grab_focus (widget);
 652
 653   /* Move focus from cell to cell and row to row */
 654   focus_row = priv->focus_row;
 655
 656   g_signal_handler_block (priv->area, priv->focus_changed_id);
 657
 658   valid = gtk_tree_model_iter_nth_child (priv->model, &iter, NULL, priv->focus_row);
 659   while (valid)
 660     {
 661       gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
 662
 663       /* If focus stays in the area we dont need to do any more */
 664       if (gtk_cell_area_focus (priv->area, direction))
 665         {
 666           priv->focus_row = focus_row;
 667
 668           /* XXX A smarter implementation would only invalidate the rectangles where
 669            * focus was removed from and new focus was placed */
 670           gtk_widget_queue_draw (widget);
 671           changed = TRUE;
 672           break;
 673         }
 674       else
 675         {
 676           if (direction == GTK_DIR_RIGHT ||
 677               direction == GTK_DIR_LEFT)
 678             break;
 679           else if (direction == GTK_DIR_UP ||
 680                    direction == GTK_DIR_TAB_BACKWARD)
 681             {
 682               if (focus_row == 0)
 683                 break;
 684               else
 685                 {
 686                   /* XXX A real implementation should check if the
 687                    * previous row can focus with its attributes setup */
 688                   focus_row--;
 689                   valid = gtk_tree_model_iter_nth_child (priv->model, &iter, NULL, focus_row);
 690                 }
 691             }
 692           else /* direction == GTK_DIR_DOWN || GTK_DIR_TAB_FORWARD */
 693             {
 694               if (focus_row == priv->row_data->len - 1)
 695                 break;
 696               else
 697                 {
 698                   /* XXX A real implementation should check if the
 699                    * previous row can focus with its attributes setup */
 700                   focus_row++;
 701                   valid = gtk_tree_model_iter_next (priv->model, &iter);
 702                 }
 703             }
 704         }
 705     }
 706
 707   g_signal_handler_unblock (priv->area, priv->focus_changed_id);
 708
 709   /* XXX A smarter implementation would only invalidate the rectangles where
 710    * focus was removed from and new focus was placed */
 711   gtk_widget_queue_draw (widget);
 712
 713   return changed;
 714 }
 715
 716 static gboolean
 717 cell_area_scaffold_button_press (GtkWidget       *widget,
 718                                  GdkEventButton  *event)
 719 {
 720   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (widget);
 721   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 722   GtkTreeIter              iter;
 723   gboolean                 valid;
 724   gint                     i = 0;
 725   GdkRectangle             event_area;
 726   GtkAllocation            allocation;
 727   gboolean                 handled = FALSE;
 728
 729   gtk_widget_get_allocation (widget, &allocation);
 730
 731   event_area.x      = 0;
 732   event_area.y      = 0;
 733   event_area.width  = allocation.width;
 734   event_area.height = allocation.height;
 735
 736   event_area.x      = priv->indent;
 737   event_area.width -= priv->indent;
 738
 739   valid = gtk_tree_model_get_iter_first (priv->model, &iter);
 740   while (valid)
 741     {
 742       RowData *data = &g_array_index (priv->row_data, RowData, i);
 743
 744       event_area.height = data->size;
 745
 746       if (event->y >= event_area.y &&
 747           event->y <= event_area.y + event_area.height)
 748         {
 749           /* XXX A real implementation would assemble GtkCellRendererState flags here */
 750           gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
 751           handled = gtk_cell_area_event (priv->area, priv->context, GTK_WIDGET (scaffold),
 752                                          (GdkEvent *)event, &event_area, 0);
 753           break;
 754         }
 755
 756       event_area.y += data->size;
 757       event_area.y += priv->row_spacing;
 758
 759       i++;
 760       valid = gtk_tree_model_iter_next (priv->model, &iter);
 761     }
 762
 763   return handled;
 764 }
 765
 766
 767 /*********************************************************
 768  *                   GtkContainerClass                   *
 769  *********************************************************/
 770 static void
 771 cell_area_scaffold_put_edit_widget (CellAreaScaffold *scaffold,
 772                                     GtkWidget        *edit_widget,
 773                                     gint              x,
 774                                     gint              y,
 775                                     gint              width,
 776                                     gint              height)
 777 {
 778   CellAreaScaffoldPrivate *priv = scaffold->priv;
 779
 780   priv->edit_rect.x      = x;
 781   priv->edit_rect.y      = y;
 782   priv->edit_rect.width  = width;
 783   priv->edit_rect.height = height;
 784   priv->edit_widget      = edit_widget;
 785
 786   gtk_widget_set_parent (edit_widget, GTK_WIDGET (scaffold));
 787 }
 788
 789 static void
 790 cell_area_scaffold_forall (GtkContainer    *container,
 791                            gboolean         include_internals,
 792                            GtkCallback      callback,
 793                            gpointer         callback_data)
 794 {
 795   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (container);
 796   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 797
 798   if (priv->edit_widget)
 799     (* callback) (priv->edit_widget, callback_data);
 800 }
 801
 802 static void
 803 cell_area_scaffold_remove (GtkContainer    *container,
 804                            GtkWidget       *child)
 805 {
 806   CellAreaScaffold        *scaffold = CELL_AREA_SCAFFOLD (container);
 807   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 808
 809   g_return_if_fail (child == priv->edit_widget);
 810
 811   gtk_widget_unparent (priv->edit_widget);
 812   priv->edit_widget = NULL;
 813 }
 814
 815 /*********************************************************
 816  *                CellAreaScaffoldClass                  *
 817  *********************************************************/
 818 static void
 819 cell_area_scaffold_activate (CellAreaScaffold *scaffold)
 820 {
 821   CellAreaScaffoldPrivate *priv     = scaffold->priv;
 822   GtkWidget               *widget   = GTK_WIDGET (scaffold);
 823   GtkAllocation            allocation;
 824   GdkRectangle             cell_area;
 825   GtkTreeIter              iter;
 826   gboolean                 valid;
 827   gint                     i = 0;
 828
 829   gtk_widget_get_allocation (widget, &allocation);
 830
 831   cell_area.x = 0;
 832   cell_area.y = 0;
 833   cell_area.width  = allocation.width;
 834   cell_area.height = allocation.height;
 835
 836   cell_area.x      = priv->indent;
 837   cell_area.width -= priv->indent;
 838
 839   valid = gtk_tree_model_get_iter_first (priv->model, &iter);
 840   while (valid)
 841     {
 842       RowData *data = &g_array_index (priv->row_data, RowData, i);
 843
 844       if (i == priv->focus_row)
 845         {
 846           cell_area.height = data->size;
 847
 848           gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
 849           gtk_cell_area_activate (priv->area, priv->context, widget, &cell_area,
 850                                   GTK_CELL_RENDERER_FOCUSED, FALSE);
 851
 852           break;
 853         }
 854
 855       cell_area.y += data->size + priv->row_spacing;
 856
 857       i++;
 858       valid = gtk_tree_model_iter_next (priv->model, &iter);
 859     }
 860 }
 861
 862 /*********************************************************
 863  *           CellArea/GtkTreeModel callbacks             *
 864  *********************************************************/
 865 static void
 866 size_changed_cb (GtkCellAreaContext  *context,
 867                  GParamSpec          *pspec,
 868                  CellAreaScaffold    *scaffold)
 869 {
 870   if (!strcmp (pspec->name, "minimum-width") ||
 871       !strcmp (pspec->name, "natural-width") ||
 872       !strcmp (pspec->name, "minimum-height") ||
 873       !strcmp (pspec->name, "natural-height"))
 874     gtk_widget_queue_resize (GTK_WIDGET (scaffold));
 875 }
 876
 877 static void
 878 focus_changed_cb (GtkCellArea      *area,
 879                   GtkCellRenderer  *renderer,
 880                   const gchar      *path,
 881                   CellAreaScaffold *scaffold)
 882 {
 883   CellAreaScaffoldPrivate *priv = scaffold->priv;
 884   GtkWidget               *widget = GTK_WIDGET (scaffold);
 885   GtkTreePath             *treepath;
 886   gint                    *indices;
 887
 888   if (!priv->model)
 889     return;
 890
 891   /* We can be signaled that a renderer lost focus, here
 892    * we dont care */
 893   if (!renderer)
 894     return;
 895
 896   treepath = gtk_tree_path_new_from_string (path);
 897   indices = gtk_tree_path_get_indices (treepath);
 898
 899   priv->focus_row = indices[0];
 900
 901   gtk_tree_path_free (treepath);
 902
 903   /* Make sure we have focus now */
 904   if (!gtk_widget_has_focus (widget))
 905     gtk_widget_grab_focus (widget);
 906
 907   gtk_widget_queue_draw (widget);
 908 }
 909
 910 static void
 911 add_editable_cb (GtkCellArea      *area,
 912                  GtkCellRenderer  *renderer,
 913                  GtkCellEditable  *edit_widget,
 914                  GdkRectangle     *cell_area,
 915                  const gchar      *path,
 916                  CellAreaScaffold *scaffold)
 917 {
 918   GtkAllocation allocation;
 919
 920   gtk_widget_get_allocation (GTK_WIDGET (scaffold), &allocation);
 921
 922   cell_area_scaffold_put_edit_widget (scaffold, GTK_WIDGET (edit_widget),
 923                                       allocation.x + cell_area->x,
 924                                       allocation.y + cell_area->y,
 925                                       cell_area->width, cell_area->height);
 926 }
 927
 928 static void
 929 remove_editable_cb (GtkCellArea      *area,
 930                     GtkCellRenderer  *renderer,
 931                     GtkCellEditable  *edit_widget,
 932                     CellAreaScaffold *scaffold)
 933 {
 934   gtk_container_remove (GTK_CONTAINER (scaffold), GTK_WIDGET (edit_widget));
 935
 936   gtk_widget_grab_focus (GTK_WIDGET (scaffold));
 937 }
 938
 939 static void
 940 rebuild_and_reset_internals (CellAreaScaffold *scaffold)
 941 {
 942   CellAreaScaffoldPrivate *priv = scaffold->priv;
 943   gint n_rows;
 944
 945   if (priv->model)
 946     {
 947       n_rows = gtk_tree_model_iter_n_children (priv->model, NULL);
 948
 949       /* Clear/reset the array */
 950       g_array_set_size (priv->row_data, n_rows);
 951       memset (priv->row_data->data, 0x0, n_rows * sizeof (RowData));
 952     }
 953   else
 954     g_array_set_size (priv->row_data, 0);
 955
 956   /* Data changed, lets reset the context and consequently queue resize and
 957    * start everything over again (note this is definitly far from optimized) */
 958   gtk_cell_area_context_reset (priv->context);
 959 }
 960
 961 static void
 962 row_changed_cb (GtkTreeModel     *model,
 963                 GtkTreePath      *path,
 964                 GtkTreeIter      *iter,
 965                 CellAreaScaffold *scaffold)
 966 {
 967   rebuild_and_reset_internals (scaffold);
 968 }
 969
 970 static void
 971 row_inserted_cb (GtkTreeModel     *model,
 972                  GtkTreePath      *path,
 973                  GtkTreeIter      *iter,
 974                  CellAreaScaffold *scaffold)
 975 {
 976   rebuild_and_reset_internals (scaffold);
 977 }
 978
 979 static void
 980 row_deleted_cb (GtkTreeModel     *model,
 981                 GtkTreePath      *path,
 982                 CellAreaScaffold *scaffold)
 983 {
 984   rebuild_and_reset_internals (scaffold);
 985 }
 986
 987 static void
 988 rows_reordered_cb (GtkTreeModel     *model,
 989                    GtkTreePath      *parent,
 990                    GtkTreeIter      *iter,
 991                    gint             *new_order,
 992                    CellAreaScaffold *scaffold)
 993 {
 994   rebuild_and_reset_internals (scaffold);
 995 }
 996
 997 /*********************************************************
 998  *                         API                           *
 999  *********************************************************/
1000 GtkWidget *
1001 cell_area_scaffold_new (void)
1002 {
1003   return (GtkWidget *)g_object_new (TYPE_CELL_AREA_SCAFFOLD, NULL);
1004 }
1005
1006 GtkCellArea  *
1007 cell_area_scaffold_get_area (CellAreaScaffold *scaffold)
1008 {
1009   CellAreaScaffoldPrivate *priv;
1010
1011   g_return_val_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold), NULL);
1012
1013   priv = scaffold->priv;
1014
1015   return priv->area;
1016 }
1017
1018 void
1019 cell_area_scaffold_set_model (CellAreaScaffold *scaffold,
1020                               GtkTreeModel     *model)
1021 {
1022   CellAreaScaffoldPrivate *priv;
1023
1024   g_return_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold));
1025
1026   priv = scaffold->priv;
1027
1028   if (priv->model != model)
1029     {
1030       if (priv->model)
1031         {
1032           g_signal_handler_disconnect (priv->model, priv->row_changed_id);
1033           g_signal_handler_disconnect (priv->model, priv->row_inserted_id);
1034           g_signal_handler_disconnect (priv->model, priv->row_deleted_id);
1035           g_signal_handler_disconnect (priv->model, priv->rows_reordered_id);
1036
1037           g_object_unref (priv->model);
1038         }
1039
1040       priv->model = model;
1041
1042       if (priv->model)
1043         {
1044           g_object_ref (priv->model);
1045
1046           priv->row_changed_id =
1047             g_signal_connect (priv->model, "row-changed",
1048                               G_CALLBACK (row_changed_cb), scaffold);
1049
1050           priv->row_inserted_id =
1051             g_signal_connect (priv->model, "row-inserted",
1052                               G_CALLBACK (row_inserted_cb), scaffold);
1053
1054           priv->row_deleted_id =
1055             g_signal_connect (priv->model, "row-deleted",
1056                               G_CALLBACK (row_deleted_cb), scaffold);
1057
1058           priv->rows_reordered_id =
1059             g_signal_connect (priv->model, "rows-reordered",
1060                               G_CALLBACK (rows_reordered_cb), scaffold);
1061         }
1062
1063       rebuild_and_reset_internals (scaffold);
1064     }
1065 }
1066
1067 GtkTreeModel *
1068 cell_area_scaffold_get_model (CellAreaScaffold *scaffold)
1069 {
1070   CellAreaScaffoldPrivate *priv;
1071
1072   g_return_val_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold), NULL);
1073
1074   priv = scaffold->priv;
1075
1076   return priv->model;
1077 }
1078
1079
1080 void
1081 cell_area_scaffold_set_row_spacing (CellAreaScaffold *scaffold,
1082                                     gint              spacing)
1083 {
1084   CellAreaScaffoldPrivate *priv;
1085
1086   g_return_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold));
1087
1088   priv = scaffold->priv;
1089
1090   if (priv->row_spacing != spacing)
1091     {
1092       priv->row_spacing = spacing;
1093       gtk_widget_queue_resize (GTK_WIDGET (scaffold));
1094     }
1095 }
1096
1097 gint
1098 cell_area_scaffold_get_row_spacing (CellAreaScaffold *scaffold)
1099 {
1100   CellAreaScaffoldPrivate *priv;
1101
1102   g_return_val_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold), 0);
1103
1104   priv = scaffold->priv;
1105
1106   return priv->row_spacing;
1107 }
1108
1109 void
1110 cell_area_scaffold_set_indentation (CellAreaScaffold *scaffold,
1111                                     gint              indent)
1112 {
1113   CellAreaScaffoldPrivate *priv;
1114
1115   g_return_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold));
1116
1117   priv = scaffold->priv;
1118
1119   if (priv->indent != indent)
1120     {
1121       priv->indent = indent;
1122       gtk_widget_queue_resize (GTK_WIDGET (scaffold));
1123     }
1124 }
1125
1126 gint
1127 cell_area_scaffold_get_indentation (CellAreaScaffold *scaffold)
1128 {
1129   CellAreaScaffoldPrivate *priv;
1130
1131   g_return_val_if_fail (IS_CELL_AREA_SCAFFOLD (scaffold), 0);
1132
1133   priv = scaffold->priv;
1134
1135   return priv->indent;
1136 }
1137
1138