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

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "gtklabel.h"
  28 #include "gtkeventbox.h"
  29 #include "gtkpixmap.h"
  30 #include "gtkmain.h"
  31 #include "gtksignal.h"
  32 #define GTK_ENABLE_BROKEN
  33 #include "gtktree.h"
  34 #include "gtktreeitem.h"
  35
  36 #include "tree_plus.xpm"
  37 #include "tree_minus.xpm"
  38
  39 #define DEFAULT_DELTA 9
  40
  41 enum {
  42   COLLAPSE_TREE,
  43   EXPAND_TREE,
  44   LAST_SIGNAL
  45 };
  46
  47 typedef struct _GtkTreePixmaps GtkTreePixmaps;
  48
  49 struct _GtkTreePixmaps {
  50   gint refcount;
  51   GdkColormap *colormap;
  52
  53   GdkPixmap *pixmap_plus;
  54   GdkPixmap *pixmap_minus;
  55   GdkBitmap *mask_plus;
  56   GdkBitmap *mask_minus;
  57 };
  58
  59 static GList *pixmaps = NULL;
  60
  61 static void gtk_tree_item_class_init (GtkTreeItemClass *klass);
  62 static void gtk_tree_item_init       (GtkTreeItem      *tree_item);
  63 static void gtk_tree_item_realize       (GtkWidget        *widget);
  64 static void gtk_tree_item_size_request  (GtkWidget        *widget,
  65                                          GtkRequisition   *requisition);
  66 static void gtk_tree_item_size_allocate (GtkWidget        *widget,
  67                                          GtkAllocation    *allocation);
  68 static void gtk_tree_item_paint         (GtkWidget        *widget,
  69                                          GdkRectangle     *area);
  70 static gint gtk_tree_item_button_press  (GtkWidget        *widget,
  71                                          GdkEventButton   *event);
  72 static gint gtk_tree_item_expose        (GtkWidget        *widget,
  73                                          GdkEventExpose   *event);
  74 static void gtk_tree_item_forall        (GtkContainer    *container,
  75                                          gboolean         include_internals,
  76                                          GtkCallback      callback,
  77                                          gpointer         callback_data);
  78
  79 static void gtk_real_tree_item_select   (GtkItem          *item);
  80 static void gtk_real_tree_item_deselect (GtkItem          *item);
  81 static void gtk_real_tree_item_toggle   (GtkItem          *item);
  82 static void gtk_real_tree_item_expand   (GtkTreeItem      *item);
  83 static void gtk_real_tree_item_collapse (GtkTreeItem      *item);
  84 static void gtk_real_tree_item_expand   (GtkTreeItem      *item);
  85 static void gtk_real_tree_item_collapse (GtkTreeItem      *item);
  86 static void gtk_tree_item_destroy        (GtkObject *object);
  87 static gint gtk_tree_item_subtree_button_click (GtkWidget *widget);
  88 static void gtk_tree_item_subtree_button_changed_state (GtkWidget *widget);
  89
  90 static void gtk_tree_item_map(GtkWidget*);
  91 static void gtk_tree_item_unmap(GtkWidget*);
  92
  93 static void gtk_tree_item_add_pixmaps    (GtkTreeItem       *tree_item);
  94 static void gtk_tree_item_remove_pixmaps (GtkTreeItem       *tree_item);
  95
  96 static GtkItemClass *parent_class = NULL;
  97 static guint tree_item_signals[LAST_SIGNAL] = { 0 };
  98
  99 GtkType
 100 gtk_tree_item_get_type (void)
 101 {
 102   static GtkType tree_item_type = 0;
 103
 104   if (!tree_item_type)
 105     {
 106       static const GtkTypeInfo tree_item_info =
 107       {
 108         "GtkTreeItem",
 109         sizeof (GtkTreeItem),
 110         sizeof (GtkTreeItemClass),
 111         (GtkClassInitFunc) gtk_tree_item_class_init,
 112         (GtkObjectInitFunc) gtk_tree_item_init,
 113         /* reserved_1 */ NULL,
 114         /* reserved_2 */ NULL,
 115         (GtkClassInitFunc) NULL,
 116       };
 117
 118       tree_item_type = gtk_type_unique (gtk_item_get_type (), &tree_item_info);
 119     }
 120
 121   return tree_item_type;
 122 }
 123
 124 static void
 125 gtk_tree_item_class_init (GtkTreeItemClass *class)
 126 {
 127   GtkObjectClass *object_class;
 128   GtkWidgetClass *widget_class;
 129   GtkContainerClass *container_class;
 130   GtkItemClass *item_class;
 131
 132   parent_class = gtk_type_class (GTK_TYPE_ITEM);
 133
 134   object_class = (GtkObjectClass*) class;
 135   widget_class = (GtkWidgetClass*) class;
 136   item_class = (GtkItemClass*) class;
 137   container_class = (GtkContainerClass*) class;
 138
 139   object_class->destroy = gtk_tree_item_destroy;
 140
 141   widget_class->realize = gtk_tree_item_realize;
 142   widget_class->size_request = gtk_tree_item_size_request;
 143   widget_class->size_allocate = gtk_tree_item_size_allocate;
 144   widget_class->button_press_event = gtk_tree_item_button_press;
 145   widget_class->expose_event = gtk_tree_item_expose;
 146   widget_class->map = gtk_tree_item_map;
 147   widget_class->unmap = gtk_tree_item_unmap;
 148
 149   container_class->forall = gtk_tree_item_forall;
 150
 151   item_class->select = gtk_real_tree_item_select;
 152   item_class->deselect = gtk_real_tree_item_deselect;
 153   item_class->toggle = gtk_real_tree_item_toggle;
 154
 155   class->expand = gtk_real_tree_item_expand;
 156   class->collapse = gtk_real_tree_item_collapse;
 157
 158   tree_item_signals[EXPAND_TREE] =
 159     gtk_signal_new ("expand",
 160                     GTK_RUN_FIRST,
 161                     GTK_CLASS_TYPE (object_class),
 162                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, expand),
 163                     gtk_marshal_VOID__VOID,
 164                     GTK_TYPE_NONE, 0);
 165   tree_item_signals[COLLAPSE_TREE] =
 166     gtk_signal_new ("collapse",
 167                     GTK_RUN_FIRST,
 168                     GTK_CLASS_TYPE (object_class),
 169                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, collapse),
 170                     gtk_marshal_VOID__VOID,
 171                     GTK_TYPE_NONE, 0);
 172 }
 173
 174 /* callback for event box mouse event */
 175 static gint
 176 gtk_tree_item_subtree_button_click (GtkWidget *widget)
 177 {
 178   GtkTreeItem* item;
 179
 180   g_return_val_if_fail (GTK_IS_EVENT_BOX (widget), FALSE);
 181
 182   item = (GtkTreeItem*) gtk_object_get_user_data (GTK_OBJECT (widget));
 183   if (!GTK_WIDGET_IS_SENSITIVE (item))
 184     return FALSE;
 185
 186   if (item->expanded)
 187     gtk_tree_item_collapse (item);
 188   else
 189     gtk_tree_item_expand (item);
 190
 191   return TRUE;
 192 }
 193
 194 /* callback for event box state changed */
 195 static void
 196 gtk_tree_item_subtree_button_changed_state (GtkWidget *widget)
 197 {
 198   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 199
 200   if (GTK_WIDGET_VISIBLE (widget))
 201     {
 202
 203       if (widget->state == GTK_STATE_NORMAL)
 204         gdk_window_set_background (widget->window, &widget->style->base[widget->state]);
 205       else
 206         gdk_window_set_background (widget->window, &widget->style->bg[widget->state]);
 207
 208       if (GTK_WIDGET_DRAWABLE (widget))
 209         gdk_window_clear_area (widget->window, 0, 0,
 210                                widget->allocation.width, widget->allocation.height);
 211     }
 212 }
 213
 214 static void
 215 gtk_tree_item_init (GtkTreeItem *tree_item)
 216 {
 217   GtkWidget *eventbox, *pixmapwid;
 218
 219   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 220
 221   tree_item->expanded = FALSE;
 222   tree_item->subtree = NULL;
 223   GTK_WIDGET_SET_FLAGS (tree_item, GTK_CAN_FOCUS);
 224
 225   /* create an event box containing one pixmaps */
 226   eventbox = gtk_event_box_new();
 227   gtk_widget_set_events (eventbox, GDK_BUTTON_PRESS_MASK);
 228   gtk_signal_connect(GTK_OBJECT(eventbox), "state_changed",
 229                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 230                      (gpointer)NULL);
 231   gtk_signal_connect(GTK_OBJECT(eventbox), "realize",
 232                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 233                      (gpointer)NULL);
 234   gtk_signal_connect(GTK_OBJECT(eventbox), "button_press_event",
 235                      (GtkSignalFunc)gtk_tree_item_subtree_button_click,
 236                      (gpointer)NULL);
 237   gtk_object_set_user_data(GTK_OBJECT(eventbox), tree_item);
 238   tree_item->pixmaps_box = eventbox;
 239
 240   /* create pixmap for button '+' */
 241   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 242   if (!tree_item->expanded)
 243     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 244   gtk_widget_show (pixmapwid);
 245   tree_item->plus_pix_widget = pixmapwid;
 246   gtk_widget_ref (tree_item->plus_pix_widget);
 247   gtk_object_sink (GTK_OBJECT (tree_item->plus_pix_widget));
 248
 249   /* create pixmap for button '-' */
 250   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 251   if (tree_item->expanded)
 252     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 253   gtk_widget_show (pixmapwid);
 254   tree_item->minus_pix_widget = pixmapwid;
 255   gtk_widget_ref (tree_item->minus_pix_widget);
 256   gtk_object_sink (GTK_OBJECT (tree_item->minus_pix_widget));
 257
 258   gtk_widget_set_parent (eventbox, GTK_WIDGET (tree_item));
 259 }
 260
 261
 262 GtkWidget*
 263 gtk_tree_item_new (void)
 264 {
 265   GtkWidget *tree_item;
 266
 267   tree_item = GTK_WIDGET (gtk_type_new (gtk_tree_item_get_type ()));
 268
 269   return tree_item;
 270 }
 271
 272 GtkWidget*
 273 gtk_tree_item_new_with_label (const gchar *label)
 274 {
 275   GtkWidget *tree_item;
 276   GtkWidget *label_widget;
 277
 278   tree_item = gtk_tree_item_new ();
 279   label_widget = gtk_label_new (label);
 280   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 281
 282   gtk_container_add (GTK_CONTAINER (tree_item), label_widget);
 283   gtk_widget_show (label_widget);
 284
 285
 286   return tree_item;
 287 }
 288
 289 void
 290 gtk_tree_item_set_subtree (GtkTreeItem *tree_item,
 291                            GtkWidget   *subtree)
 292 {
 293   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 294   g_return_if_fail (GTK_IS_TREE (subtree));
 295
 296   if (tree_item->subtree)
 297     {
 298       g_warning("there is already a subtree for this tree item\n");
 299       return;
 300     }
 301
 302   tree_item->subtree = subtree;
 303   GTK_TREE (subtree)->tree_owner = GTK_WIDGET (tree_item);
 304
 305   /* show subtree button */
 306   if (tree_item->pixmaps_box)
 307     gtk_widget_show (tree_item->pixmaps_box);
 308
 309   if (tree_item->expanded)
 310     gtk_widget_show (subtree);
 311   else
 312     gtk_widget_hide (subtree);
 313
 314   gtk_widget_set_parent (subtree, GTK_WIDGET (tree_item)->parent);
 315 }
 316
 317 void
 318 gtk_tree_item_select (GtkTreeItem *tree_item)
 319 {
 320   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 321
 322   gtk_item_select (GTK_ITEM (tree_item));
 323 }
 324
 325 void
 326 gtk_tree_item_deselect (GtkTreeItem *tree_item)
 327 {
 328   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 329
 330   gtk_item_deselect (GTK_ITEM (tree_item));
 331 }
 332
 333 void
 334 gtk_tree_item_expand (GtkTreeItem *tree_item)
 335 {
 336   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 337
 338   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[EXPAND_TREE], NULL);
 339 }
 340
 341 void
 342 gtk_tree_item_collapse (GtkTreeItem *tree_item)
 343 {
 344   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 345
 346   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[COLLAPSE_TREE], NULL);
 347 }
 348
 349 static void
 350 gtk_tree_item_add_pixmaps (GtkTreeItem *tree_item)
 351 {
 352   GList *tmp_list;
 353   GdkColormap *colormap;
 354   GtkTreePixmaps *pixmap_node = NULL;
 355
 356   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 357
 358   if (tree_item->pixmaps)
 359     return;
 360
 361   colormap = gtk_widget_get_colormap (GTK_WIDGET (tree_item));
 362
 363   tmp_list = pixmaps;
 364   while (tmp_list)
 365     {
 366       pixmap_node = (GtkTreePixmaps *)tmp_list->data;
 367
 368       if (pixmap_node->colormap == colormap)
 369         break;
 370
 371       tmp_list = tmp_list->next;
 372     }
 373
 374   if (tmp_list)
 375     {
 376       pixmap_node->refcount++;
 377       tree_item->pixmaps = tmp_list;
 378     }
 379   else
 380     {
 381       pixmap_node = g_new (GtkTreePixmaps, 1);
 382
 383       pixmap_node->colormap = colormap;
 384       gdk_colormap_ref (colormap);
 385
 386       pixmap_node->refcount = 1;
 387
 388       /* create pixmaps for plus icon */
 389       pixmap_node->pixmap_plus =
 390         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 391                                       &pixmap_node->mask_plus,
 392                                       NULL,
 393                                       tree_plus);
 394
 395       /* create pixmaps for minus icon */
 396       pixmap_node->pixmap_minus =
 397         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 398                                       &pixmap_node->mask_minus,
 399                                       NULL,
 400                                       tree_minus);
 401
 402       tree_item->pixmaps = pixmaps = g_list_prepend (pixmaps, pixmap_node);
 403     }
 404
 405   gtk_pixmap_set (GTK_PIXMAP (tree_item->plus_pix_widget),
 406                   pixmap_node->pixmap_plus, pixmap_node->mask_plus);
 407   gtk_pixmap_set (GTK_PIXMAP (tree_item->minus_pix_widget),
 408                   pixmap_node->pixmap_minus, pixmap_node->mask_minus);
 409 }
 410
 411 static void
 412 gtk_tree_item_remove_pixmaps (GtkTreeItem *tree_item)
 413 {
 414   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 415
 416   if (tree_item->pixmaps)
 417     {
 418       GtkTreePixmaps *pixmap_node = (GtkTreePixmaps *)tree_item->pixmaps->data;
 419
 420       g_assert (pixmap_node->refcount > 0);
 421
 422       if (--pixmap_node->refcount == 0)
 423         {
 424           gdk_colormap_unref (pixmap_node->colormap);
 425           gdk_pixmap_unref (pixmap_node->pixmap_plus);
 426           gdk_bitmap_unref (pixmap_node->mask_plus);
 427           gdk_pixmap_unref (pixmap_node->pixmap_minus);
 428           gdk_bitmap_unref (pixmap_node->mask_minus);
 429
 430           pixmaps = g_list_remove_link (pixmaps, tree_item->pixmaps);
 431           g_list_free_1 (tree_item->pixmaps);
 432           g_free (pixmap_node);
 433         }
 434
 435       tree_item->pixmaps = NULL;
 436     }
 437 }
 438
 439 static void
 440 gtk_tree_item_realize (GtkWidget *widget)
 441 {
 442   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 443
 444   if (GTK_WIDGET_CLASS (parent_class)->realize)
 445     (* GTK_WIDGET_CLASS (parent_class)->realize) (widget);
 446
 447   gdk_window_set_background (widget->window,
 448                              &widget->style->base[GTK_STATE_NORMAL]);
 449
 450   gtk_tree_item_add_pixmaps (GTK_TREE_ITEM (widget));
 451 }
 452
 453 static void
 454 gtk_tree_item_size_request (GtkWidget      *widget,
 455                             GtkRequisition *requisition)
 456 {
 457   GtkBin *bin;
 458   GtkTreeItem* item;
 459   GtkRequisition child_requisition;
 460
 461   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 462   g_return_if_fail (requisition != NULL);
 463
 464   bin = GTK_BIN (widget);
 465   item = GTK_TREE_ITEM(widget);
 466
 467   requisition->width = (GTK_CONTAINER (widget)->border_width +
 468                         widget->style->xthickness) * 2;
 469   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 470
 471   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 472     {
 473       GtkRequisition pix_requisition;
 474
 475       gtk_widget_size_request (bin->child, &child_requisition);
 476
 477       requisition->width += child_requisition.width;
 478
 479       gtk_widget_size_request (item->pixmaps_box,
 480                                &pix_requisition);
 481       requisition->width += pix_requisition.width + DEFAULT_DELTA +
 482         GTK_TREE (widget->parent)->current_indent;
 483
 484       requisition->height += MAX (child_requisition.height,
 485                                   pix_requisition.height);
 486     }
 487 }
 488
 489 static void
 490 gtk_tree_item_size_allocate (GtkWidget     *widget,
 491                              GtkAllocation *allocation)
 492 {
 493   GtkBin *bin;
 494   GtkTreeItem* item;
 495   GtkAllocation child_allocation;
 496   gint border_width;
 497   int temp;
 498
 499   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 500   g_return_if_fail (allocation != NULL);
 501
 502   widget->allocation = *allocation;
 503   if (GTK_WIDGET_REALIZED (widget))
 504     gdk_window_move_resize (widget->window,
 505                             allocation->x, allocation->y,
 506                             allocation->width, allocation->height);
 507
 508   bin = GTK_BIN (widget);
 509   item = GTK_TREE_ITEM(widget);
 510
 511   if (bin->child)
 512     {
 513       border_width = (GTK_CONTAINER (widget)->border_width +
 514                       widget->style->xthickness);
 515
 516       child_allocation.x = border_width + GTK_TREE(widget->parent)->current_indent;
 517       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 518
 519       child_allocation.width = item->pixmaps_box->requisition.width;
 520       child_allocation.height = item->pixmaps_box->requisition.height;
 521
 522       temp = allocation->height - child_allocation.height;
 523       child_allocation.y += ( temp / 2 ) + ( temp % 2 );
 524
 525       gtk_widget_size_allocate (item->pixmaps_box, &child_allocation);
 526
 527       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 528       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 529       child_allocation.x += item->pixmaps_box->requisition.width+DEFAULT_DELTA;
 530
 531       child_allocation.width =
 532         MAX (1, (gint)allocation->width - ((gint)child_allocation.x + border_width));
 533
 534       gtk_widget_size_allocate (bin->child, &child_allocation);
 535     }
 536 }
 537
 538 static void
 539 gtk_tree_item_draw_lines (GtkWidget *widget)
 540 {
 541   GtkTreeItem* item;
 542   GtkTree* tree;
 543   guint lx1, ly1, lx2, ly2;
 544   GdkGC* gc;
 545
 546   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 547
 548   item = GTK_TREE_ITEM(widget);
 549   tree = GTK_TREE(widget->parent);
 550
 551   if (!tree->view_line)
 552     return;
 553
 554   gc = widget->style->text_gc[GTK_STATE_NORMAL];
 555
 556   /* draw vertical line */
 557   lx1 = item->pixmaps_box->allocation.width;
 558   lx1 = lx2 = ((lx1 / 2) + (lx1 % 2) +
 559                GTK_CONTAINER (widget)->border_width + 1 + tree->current_indent);
 560   ly1 = 0;
 561   ly2 = widget->allocation.height;
 562
 563   if (g_list_last (tree->children)->data == widget)
 564     ly2 = (ly2 / 2) + (ly2 % 2);
 565
 566   if (tree != tree->root_tree)
 567     gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 568
 569   /* draw vertical line for subtree connecting */
 570   if(g_list_last(tree->children)->data != (gpointer)widget)
 571     ly2 = (ly2 / 2) + (ly2 % 2);
 572
 573   lx2 += DEFAULT_DELTA;
 574
 575   if (item->subtree && item->expanded)
 576     gdk_draw_line (widget->window, gc,
 577                    lx2, ly2, lx2, widget->allocation.height);
 578
 579   /* draw horizontal line */
 580   ly1 = ly2;
 581   lx2 += 2;
 582
 583   gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 584
 585   lx2 -= DEFAULT_DELTA+2;
 586   ly1 = 0;
 587   ly2 = widget->allocation.height;
 588
 589   if (tree != tree->root_tree)
 590     {
 591       item = GTK_TREE_ITEM (tree->tree_owner);
 592       tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 593       while (tree != tree->root_tree)
 594         {
 595           lx1 = lx2 -= tree->indent_value;
 596
 597           if (g_list_last (tree->children)->data != item)
 598             gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 599           item = GTK_TREE_ITEM (tree->tree_owner);
 600           tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 601         }
 602     }
 603 }
 604
 605 static void
 606 gtk_tree_item_paint (GtkWidget    *widget,
 607                      GdkRectangle *area)
 608 {
 609   GtkBin *bin;
 610   GdkRectangle child_area, item_area;
 611   GtkTreeItem* tree_item;
 612
 613   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 614   g_return_if_fail (area != NULL);
 615
 616   /* FIXME: We should honor tree->view_mode, here - I think
 617    * the desired effect is that when the mode is VIEW_ITEM,
 618    * only the subitem is drawn as selected, not the entire
 619    * line. (Like the way that the tree in Windows Explorer
 620    * works).
 621    */
 622   if (GTK_WIDGET_DRAWABLE (widget))
 623     {
 624       bin = GTK_BIN (widget);
 625       tree_item = GTK_TREE_ITEM(widget);
 626
 627       if (widget->state == GTK_STATE_NORMAL)
 628         {
 629           gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 630           gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
 631         }
 632       else
 633         {
 634           if (!GTK_WIDGET_IS_SENSITIVE (widget))
 635             gtk_paint_flat_box(widget->style, widget->window,
 636                                widget->state, GTK_STATE_INSENSITIVE,
 637                                area, widget, "treeitem",
 638                                0, 0, -1, -1);
 639           else
 640             gtk_paint_flat_box(widget->style, widget->window,
 641                                widget->state, GTK_SHADOW_ETCHED_OUT,
 642                                area, widget, "treeitem",
 643                                0, 0, -1, -1);
 644         }
 645
 646       /* draw left size of tree item */
 647       item_area.x = 0;
 648       item_area.y = 0;
 649       item_area.width = (tree_item->pixmaps_box->allocation.width + DEFAULT_DELTA +
 650                          GTK_TREE (widget->parent)->current_indent + 2);
 651       item_area.height = widget->allocation.height;
 652
 653
 654       if (gdk_rectangle_intersect(&item_area, area, &child_area))
 655         {
 656
 657           gtk_tree_item_draw_lines(widget);
 658
 659           if (tree_item->pixmaps_box &&
 660               GTK_WIDGET_VISIBLE(tree_item->pixmaps_box) &&
 661               gtk_widget_intersect (tree_item->pixmaps_box, area, &child_area))
 662             gtk_widget_draw (tree_item->pixmaps_box, &child_area);
 663         }
 664
 665       if (GTK_WIDGET_HAS_FOCUS (widget))
 666         gtk_paint_focus (widget->style, widget->window,
 667                          NULL, widget, "treeitem",
 668                          0, 0,
 669                          widget->allocation.width - 1,
 670                          widget->allocation.height - 1);
 671
 672     }
 673 }
 674
 675 static gint
 676 gtk_tree_item_button_press (GtkWidget      *widget,
 677                             GdkEventButton *event)
 678 {
 679
 680   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 681   g_return_val_if_fail (event != NULL, FALSE);
 682
 683   if (event->type == GDK_BUTTON_PRESS
 684         && GTK_WIDGET_IS_SENSITIVE(widget)
 685         && !GTK_WIDGET_HAS_FOCUS (widget))
 686       gtk_widget_grab_focus (widget);
 687
 688   return (event->type == GDK_BUTTON_PRESS && GTK_WIDGET_IS_SENSITIVE(widget));
 689 }
 690
 691 static gint
 692 gtk_tree_item_expose (GtkWidget      *widget,
 693                       GdkEventExpose *event)
 694 {
 695   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 696   g_return_val_if_fail (event != NULL, FALSE);
 697
 698   if (GTK_WIDGET_DRAWABLE (widget))
 699     {
 700       gtk_tree_item_paint (widget, &event->area);
 701
 702       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 703    }
 704
 705   return FALSE;
 706 }
 707
 708 static void
 709 gtk_real_tree_item_select (GtkItem *item)
 710 {
 711   GtkTreeItem *tree_item;
 712   GtkWidget *widget;
 713
 714   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 715
 716   tree_item = GTK_TREE_ITEM (item);
 717   widget = GTK_WIDGET (item);
 718
 719   gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 720
 721   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 722     gtk_widget_set_state (GTK_TREE_ITEM (item)->pixmaps_box, GTK_STATE_SELECTED);
 723 }
 724
 725 static void
 726 gtk_real_tree_item_deselect (GtkItem *item)
 727 {
 728   GtkTreeItem *tree_item;
 729   GtkWidget *widget;
 730
 731   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 732
 733   tree_item = GTK_TREE_ITEM (item);
 734   widget = GTK_WIDGET (item);
 735
 736   gtk_widget_set_state (widget, GTK_STATE_NORMAL);
 737
 738   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 739     gtk_widget_set_state (tree_item->pixmaps_box, GTK_STATE_NORMAL);
 740 }
 741
 742 static void
 743 gtk_real_tree_item_toggle (GtkItem *item)
 744 {
 745   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 746
 747   if(!GTK_WIDGET_IS_SENSITIVE(item))
 748     return;
 749
 750   if (GTK_WIDGET (item)->parent && GTK_IS_TREE (GTK_WIDGET (item)->parent))
 751     gtk_tree_select_child (GTK_TREE (GTK_WIDGET (item)->parent),
 752                            GTK_WIDGET (item));
 753   else
 754     {
 755       /* Should we really bother with this bit? A listitem not in a list?
 756        * -Johannes Keukelaar
 757        * yes, always be on the safe side!
 758        * -timj
 759        */
 760       if (GTK_WIDGET (item)->state == GTK_STATE_SELECTED)
 761         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_NORMAL);
 762       else
 763         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 764     }
 765 }
 766
 767 static void
 768 gtk_real_tree_item_expand (GtkTreeItem *tree_item)
 769 {
 770   GtkTree* tree;
 771
 772   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 773
 774   if (tree_item->subtree && !tree_item->expanded)
 775     {
 776       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 777
 778       /* hide subtree widget */
 779       gtk_widget_show (tree_item->subtree);
 780
 781       /* hide button '+' and show button '-' */
 782       if (tree_item->pixmaps_box)
 783         {
 784           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 785                                 tree_item->plus_pix_widget);
 786           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 787                              tree_item->minus_pix_widget);
 788         }
 789       if (tree->root_tree)
 790         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 791       tree_item->expanded = TRUE;
 792     }
 793 }
 794
 795 static void
 796 gtk_real_tree_item_collapse (GtkTreeItem *tree_item)
 797 {
 798   GtkTree* tree;
 799
 800   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 801
 802   if (tree_item->subtree && tree_item->expanded)
 803     {
 804       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 805
 806       /* hide subtree widget */
 807       gtk_widget_hide (tree_item->subtree);
 808
 809       /* hide button '-' and show button '+' */
 810       if (tree_item->pixmaps_box)
 811         {
 812           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 813                                 tree_item->minus_pix_widget);
 814           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 815                              tree_item->plus_pix_widget);
 816         }
 817       if (tree->root_tree)
 818         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 819       tree_item->expanded = FALSE;
 820     }
 821 }
 822
 823 static void
 824 gtk_tree_item_destroy (GtkObject *object)
 825 {
 826   GtkTreeItem* item;
 827   GtkWidget* child;
 828
 829   g_return_if_fail (GTK_IS_TREE_ITEM (object));
 830
 831 #ifdef TREE_DEBUG
 832   g_message("+ gtk_tree_item_destroy [object %#x]\n", (int)object);
 833 #endif /* TREE_DEBUG */
 834
 835   item = GTK_TREE_ITEM(object);
 836
 837   /* free sub tree if it exist */
 838   child = item->subtree;
 839   if (child)
 840     {
 841       gtk_widget_ref (child);
 842       gtk_widget_unparent (child);
 843       gtk_widget_destroy (child);
 844       gtk_widget_unref (child);
 845       item->subtree = NULL;
 846     }
 847
 848   /* free pixmaps box */
 849   child = item->pixmaps_box;
 850   if (child)
 851     {
 852       gtk_widget_ref (child);
 853       gtk_widget_unparent (child);
 854       gtk_widget_destroy (child);
 855       gtk_widget_unref (child);
 856       item->pixmaps_box = NULL;
 857     }
 858
 859
 860   /* destroy plus pixmap */
 861   if (item->plus_pix_widget)
 862     {
 863       gtk_widget_destroy (item->plus_pix_widget);
 864       gtk_widget_unref (item->plus_pix_widget);
 865       item->plus_pix_widget = NULL;
 866     }
 867
 868   /* destroy minus pixmap */
 869   if (item->minus_pix_widget)
 870     {
 871       gtk_widget_destroy (item->minus_pix_widget);
 872       gtk_widget_unref (item->minus_pix_widget);
 873       item->minus_pix_widget = NULL;
 874     }
 875
 876   /* By removing the pixmaps here, and not in unrealize, we depend on
 877    * the fact that a widget can never change colormap or visual.
 878    */
 879   gtk_tree_item_remove_pixmaps (item);
 880
 881   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 882
 883 #ifdef TREE_DEBUG
 884   g_message("- gtk_tree_item_destroy\n");
 885 #endif /* TREE_DEBUG */
 886 }
 887
 888 void
 889 gtk_tree_item_remove_subtree (GtkTreeItem* item)
 890 {
 891   g_return_if_fail (GTK_IS_TREE_ITEM(item));
 892   g_return_if_fail (item->subtree != NULL);
 893
 894   if (GTK_TREE (item->subtree)->children)
 895     {
 896       /* The following call will remove the children and call
 897        * gtk_tree_item_remove_subtree() again. So we are done.
 898        */
 899       gtk_tree_remove_items (GTK_TREE (item->subtree),
 900                              GTK_TREE (item->subtree)->children);
 901       return;
 902     }
 903
 904   if (GTK_WIDGET_MAPPED (item->subtree))
 905     gtk_widget_unmap (item->subtree);
 906
 907   gtk_widget_unparent (item->subtree);
 908
 909   if (item->pixmaps_box)
 910     gtk_widget_hide (item->pixmaps_box);
 911
 912   item->subtree = NULL;
 913
 914   if (item->expanded)
 915     {
 916       item->expanded = FALSE;
 917       if (item->pixmaps_box)
 918         {
 919           gtk_container_remove (GTK_CONTAINER (item->pixmaps_box),
 920                                 item->minus_pix_widget);
 921           gtk_container_add (GTK_CONTAINER (item->pixmaps_box),
 922                              item->plus_pix_widget);
 923         }
 924     }
 925 }
 926
 927 static void
 928 gtk_tree_item_map (GtkWidget *widget)
 929 {
 930   GtkBin *bin;
 931   GtkTreeItem* item;
 932
 933   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 934
 935   bin = GTK_BIN (widget);
 936   item = GTK_TREE_ITEM(widget);
 937
 938   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 939
 940   if(item->pixmaps_box &&
 941      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
 942      !GTK_WIDGET_MAPPED (item->pixmaps_box))
 943     gtk_widget_map (item->pixmaps_box);
 944
 945   if (bin->child &&
 946       GTK_WIDGET_VISIBLE (bin->child) &&
 947       !GTK_WIDGET_MAPPED (bin->child))
 948     gtk_widget_map (bin->child);
 949
 950   gdk_window_show (widget->window);
 951 }
 952
 953 static void
 954 gtk_tree_item_unmap (GtkWidget *widget)
 955 {
 956   GtkBin *bin;
 957   GtkTreeItem* item;
 958
 959   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 960
 961   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
 962   bin = GTK_BIN (widget);
 963   item = GTK_TREE_ITEM(widget);
 964
 965   gdk_window_hide (widget->window);
 966
 967   if(item->pixmaps_box &&
 968      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
 969      GTK_WIDGET_MAPPED (item->pixmaps_box))
 970     gtk_widget_unmap (bin->child);
 971
 972   if (bin->child &&
 973       GTK_WIDGET_VISIBLE (bin->child) &&
 974       GTK_WIDGET_MAPPED (bin->child))
 975     gtk_widget_unmap (bin->child);
 976 }
 977
 978 static void
 979 gtk_tree_item_forall (GtkContainer *container,
 980                       gboolean      include_internals,
 981                       GtkCallback   callback,
 982                       gpointer      callback_data)
 983 {
 984   GtkBin *bin;
 985   GtkTreeItem *tree_item;
 986
 987   g_return_if_fail (GTK_IS_TREE_ITEM (container));
 988   g_return_if_fail (callback != NULL);
 989
 990   bin = GTK_BIN (container);
 991   tree_item = GTK_TREE_ITEM (container);
 992
 993   if (bin->child)
 994     (* callback) (bin->child, callback_data);
 995   if (include_internals && tree_item->subtree)
 996     (* callback) (tree_item->subtree, callback_data);
 997 }