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   if (GTK_WIDGET_REALIZED (subtree->parent))
 317     gtk_widget_realize (subtree);
 318
 319   if (GTK_WIDGET_VISIBLE (subtree->parent) && GTK_WIDGET_VISIBLE (subtree))
 320     {
 321       if (GTK_WIDGET_MAPPED (subtree->parent))
 322         gtk_widget_map (subtree);
 323
 324       gtk_widget_queue_resize (subtree);
 325     }
 326 }
 327
 328 void
 329 gtk_tree_item_select (GtkTreeItem *tree_item)
 330 {
 331   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 332
 333   gtk_item_select (GTK_ITEM (tree_item));
 334 }
 335
 336 void
 337 gtk_tree_item_deselect (GtkTreeItem *tree_item)
 338 {
 339   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 340
 341   gtk_item_deselect (GTK_ITEM (tree_item));
 342 }
 343
 344 void
 345 gtk_tree_item_expand (GtkTreeItem *tree_item)
 346 {
 347   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 348
 349   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[EXPAND_TREE], NULL);
 350 }
 351
 352 void
 353 gtk_tree_item_collapse (GtkTreeItem *tree_item)
 354 {
 355   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 356
 357   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[COLLAPSE_TREE], NULL);
 358 }
 359
 360 static void
 361 gtk_tree_item_add_pixmaps (GtkTreeItem *tree_item)
 362 {
 363   GList *tmp_list;
 364   GdkColormap *colormap;
 365   GtkTreePixmaps *pixmap_node = NULL;
 366
 367   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 368
 369   if (tree_item->pixmaps)
 370     return;
 371
 372   colormap = gtk_widget_get_colormap (GTK_WIDGET (tree_item));
 373
 374   tmp_list = pixmaps;
 375   while (tmp_list)
 376     {
 377       pixmap_node = (GtkTreePixmaps *)tmp_list->data;
 378
 379       if (pixmap_node->colormap == colormap)
 380         break;
 381
 382       tmp_list = tmp_list->next;
 383     }
 384
 385   if (tmp_list)
 386     {
 387       pixmap_node->refcount++;
 388       tree_item->pixmaps = tmp_list;
 389     }
 390   else
 391     {
 392       pixmap_node = g_new (GtkTreePixmaps, 1);
 393
 394       pixmap_node->colormap = colormap;
 395       gdk_colormap_ref (colormap);
 396
 397       pixmap_node->refcount = 1;
 398
 399       /* create pixmaps for plus icon */
 400       pixmap_node->pixmap_plus =
 401         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 402                                       &pixmap_node->mask_plus,
 403                                       NULL,
 404                                       tree_plus);
 405
 406       /* create pixmaps for minus icon */
 407       pixmap_node->pixmap_minus =
 408         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 409                                       &pixmap_node->mask_minus,
 410                                       NULL,
 411                                       tree_minus);
 412
 413       tree_item->pixmaps = pixmaps = g_list_prepend (pixmaps, pixmap_node);
 414     }
 415
 416   gtk_pixmap_set (GTK_PIXMAP (tree_item->plus_pix_widget),
 417                   pixmap_node->pixmap_plus, pixmap_node->mask_plus);
 418   gtk_pixmap_set (GTK_PIXMAP (tree_item->minus_pix_widget),
 419                   pixmap_node->pixmap_minus, pixmap_node->mask_minus);
 420 }
 421
 422 static void
 423 gtk_tree_item_remove_pixmaps (GtkTreeItem *tree_item)
 424 {
 425   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 426
 427   if (tree_item->pixmaps)
 428     {
 429       GtkTreePixmaps *pixmap_node = (GtkTreePixmaps *)tree_item->pixmaps->data;
 430
 431       g_assert (pixmap_node->refcount > 0);
 432
 433       if (--pixmap_node->refcount == 0)
 434         {
 435           gdk_colormap_unref (pixmap_node->colormap);
 436           gdk_pixmap_unref (pixmap_node->pixmap_plus);
 437           gdk_bitmap_unref (pixmap_node->mask_plus);
 438           gdk_pixmap_unref (pixmap_node->pixmap_minus);
 439           gdk_bitmap_unref (pixmap_node->mask_minus);
 440
 441           pixmaps = g_list_remove_link (pixmaps, tree_item->pixmaps);
 442           g_list_free_1 (tree_item->pixmaps);
 443           g_free (pixmap_node);
 444         }
 445
 446       tree_item->pixmaps = NULL;
 447     }
 448 }
 449
 450 static void
 451 gtk_tree_item_realize (GtkWidget *widget)
 452 {
 453   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 454
 455   if (GTK_WIDGET_CLASS (parent_class)->realize)
 456     (* GTK_WIDGET_CLASS (parent_class)->realize) (widget);
 457
 458   gdk_window_set_background (widget->window,
 459                              &widget->style->base[GTK_STATE_NORMAL]);
 460
 461   gtk_tree_item_add_pixmaps (GTK_TREE_ITEM (widget));
 462 }
 463
 464 static void
 465 gtk_tree_item_size_request (GtkWidget      *widget,
 466                             GtkRequisition *requisition)
 467 {
 468   GtkBin *bin;
 469   GtkTreeItem* item;
 470   GtkRequisition child_requisition;
 471
 472   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 473   g_return_if_fail (requisition != NULL);
 474
 475   bin = GTK_BIN (widget);
 476   item = GTK_TREE_ITEM(widget);
 477
 478   requisition->width = (GTK_CONTAINER (widget)->border_width +
 479                         widget->style->xthickness) * 2;
 480   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 481
 482   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 483     {
 484       GtkRequisition pix_requisition;
 485
 486       gtk_widget_size_request (bin->child, &child_requisition);
 487
 488       requisition->width += child_requisition.width;
 489
 490       gtk_widget_size_request (item->pixmaps_box,
 491                                &pix_requisition);
 492       requisition->width += pix_requisition.width + DEFAULT_DELTA +
 493         GTK_TREE (widget->parent)->current_indent;
 494
 495       requisition->height += MAX (child_requisition.height,
 496                                   pix_requisition.height);
 497     }
 498 }
 499
 500 static void
 501 gtk_tree_item_size_allocate (GtkWidget     *widget,
 502                              GtkAllocation *allocation)
 503 {
 504   GtkBin *bin;
 505   GtkTreeItem* item;
 506   GtkAllocation child_allocation;
 507   gint border_width;
 508   int temp;
 509
 510   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 511   g_return_if_fail (allocation != NULL);
 512
 513   widget->allocation = *allocation;
 514   if (GTK_WIDGET_REALIZED (widget))
 515     gdk_window_move_resize (widget->window,
 516                             allocation->x, allocation->y,
 517                             allocation->width, allocation->height);
 518
 519   bin = GTK_BIN (widget);
 520   item = GTK_TREE_ITEM(widget);
 521
 522   if (bin->child)
 523     {
 524       border_width = (GTK_CONTAINER (widget)->border_width +
 525                       widget->style->xthickness);
 526
 527       child_allocation.x = border_width + GTK_TREE(widget->parent)->current_indent;
 528       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 529
 530       child_allocation.width = item->pixmaps_box->requisition.width;
 531       child_allocation.height = item->pixmaps_box->requisition.height;
 532
 533       temp = allocation->height - child_allocation.height;
 534       child_allocation.y += ( temp / 2 ) + ( temp % 2 );
 535
 536       gtk_widget_size_allocate (item->pixmaps_box, &child_allocation);
 537
 538       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 539       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 540       child_allocation.x += item->pixmaps_box->requisition.width+DEFAULT_DELTA;
 541
 542       child_allocation.width =
 543         MAX (1, (gint)allocation->width - ((gint)child_allocation.x + border_width));
 544
 545       gtk_widget_size_allocate (bin->child, &child_allocation);
 546     }
 547 }
 548
 549 static void
 550 gtk_tree_item_draw_lines (GtkWidget *widget)
 551 {
 552   GtkTreeItem* item;
 553   GtkTree* tree;
 554   guint lx1, ly1, lx2, ly2;
 555   GdkGC* gc;
 556
 557   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 558
 559   item = GTK_TREE_ITEM(widget);
 560   tree = GTK_TREE(widget->parent);
 561
 562   if (!tree->view_line)
 563     return;
 564
 565   gc = widget->style->text_gc[GTK_STATE_NORMAL];
 566
 567   /* draw vertical line */
 568   lx1 = item->pixmaps_box->allocation.width;
 569   lx1 = lx2 = ((lx1 / 2) + (lx1 % 2) +
 570                GTK_CONTAINER (widget)->border_width + 1 + tree->current_indent);
 571   ly1 = 0;
 572   ly2 = widget->allocation.height;
 573
 574   if (g_list_last (tree->children)->data == widget)
 575     ly2 = (ly2 / 2) + (ly2 % 2);
 576
 577   if (tree != tree->root_tree)
 578     gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 579
 580   /* draw vertical line for subtree connecting */
 581   if(g_list_last(tree->children)->data != (gpointer)widget)
 582     ly2 = (ly2 / 2) + (ly2 % 2);
 583
 584   lx2 += DEFAULT_DELTA;
 585
 586   if (item->subtree && item->expanded)
 587     gdk_draw_line (widget->window, gc,
 588                    lx2, ly2, lx2, widget->allocation.height);
 589
 590   /* draw horizontal line */
 591   ly1 = ly2;
 592   lx2 += 2;
 593
 594   gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 595
 596   lx2 -= DEFAULT_DELTA+2;
 597   ly1 = 0;
 598   ly2 = widget->allocation.height;
 599
 600   if (tree != tree->root_tree)
 601     {
 602       item = GTK_TREE_ITEM (tree->tree_owner);
 603       tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 604       while (tree != tree->root_tree)
 605         {
 606           lx1 = lx2 -= tree->indent_value;
 607
 608           if (g_list_last (tree->children)->data != item)
 609             gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 610           item = GTK_TREE_ITEM (tree->tree_owner);
 611           tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 612         }
 613     }
 614 }
 615
 616 static void
 617 gtk_tree_item_paint (GtkWidget    *widget,
 618                      GdkRectangle *area)
 619 {
 620   GtkBin *bin;
 621   GdkRectangle child_area, item_area;
 622   GtkTreeItem* tree_item;
 623
 624   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 625   g_return_if_fail (area != NULL);
 626
 627   /* FIXME: We should honor tree->view_mode, here - I think
 628    * the desired effect is that when the mode is VIEW_ITEM,
 629    * only the subitem is drawn as selected, not the entire
 630    * line. (Like the way that the tree in Windows Explorer
 631    * works).
 632    */
 633   if (GTK_WIDGET_DRAWABLE (widget))
 634     {
 635       bin = GTK_BIN (widget);
 636       tree_item = GTK_TREE_ITEM(widget);
 637
 638       if (widget->state == GTK_STATE_NORMAL)
 639         {
 640           gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 641           gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
 642         }
 643       else
 644         {
 645           if (!GTK_WIDGET_IS_SENSITIVE (widget))
 646             gtk_paint_flat_box(widget->style, widget->window,
 647                                widget->state, GTK_STATE_INSENSITIVE,
 648                                area, widget, "treeitem",
 649                                0, 0, -1, -1);
 650           else
 651             gtk_paint_flat_box(widget->style, widget->window,
 652                                widget->state, GTK_SHADOW_ETCHED_OUT,
 653                                area, widget, "treeitem",
 654                                0, 0, -1, -1);
 655         }
 656
 657       /* draw left size of tree item */
 658       item_area.x = 0;
 659       item_area.y = 0;
 660       item_area.width = (tree_item->pixmaps_box->allocation.width + DEFAULT_DELTA +
 661                          GTK_TREE (widget->parent)->current_indent + 2);
 662       item_area.height = widget->allocation.height;
 663
 664
 665       if (gdk_rectangle_intersect(&item_area, area, &child_area))
 666         {
 667
 668           gtk_tree_item_draw_lines(widget);
 669
 670           if (tree_item->pixmaps_box &&
 671               GTK_WIDGET_VISIBLE(tree_item->pixmaps_box) &&
 672               gtk_widget_intersect (tree_item->pixmaps_box, area, &child_area))
 673             gtk_widget_draw (tree_item->pixmaps_box, &child_area);
 674         }
 675
 676       if (GTK_WIDGET_HAS_FOCUS (widget))
 677         gtk_paint_focus (widget->style, widget->window,
 678                          NULL, widget, "treeitem",
 679                          0, 0,
 680                          widget->allocation.width - 1,
 681                          widget->allocation.height - 1);
 682
 683     }
 684 }
 685
 686 static gint
 687 gtk_tree_item_button_press (GtkWidget      *widget,
 688                             GdkEventButton *event)
 689 {
 690
 691   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 692   g_return_val_if_fail (event != NULL, FALSE);
 693
 694   if (event->type == GDK_BUTTON_PRESS
 695         && GTK_WIDGET_IS_SENSITIVE(widget)
 696         && !GTK_WIDGET_HAS_FOCUS (widget))
 697       gtk_widget_grab_focus (widget);
 698
 699   return (event->type == GDK_BUTTON_PRESS && GTK_WIDGET_IS_SENSITIVE(widget));
 700 }
 701
 702 static gint
 703 gtk_tree_item_expose (GtkWidget      *widget,
 704                       GdkEventExpose *event)
 705 {
 706   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 707   g_return_val_if_fail (event != NULL, FALSE);
 708
 709   if (GTK_WIDGET_DRAWABLE (widget))
 710     {
 711       gtk_tree_item_paint (widget, &event->area);
 712
 713       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 714    }
 715
 716   return FALSE;
 717 }
 718
 719 static void
 720 gtk_real_tree_item_select (GtkItem *item)
 721 {
 722   GtkTreeItem *tree_item;
 723   GtkWidget *widget;
 724
 725   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 726
 727   tree_item = GTK_TREE_ITEM (item);
 728   widget = GTK_WIDGET (item);
 729
 730   gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 731
 732   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 733     gtk_widget_set_state (GTK_TREE_ITEM (item)->pixmaps_box, GTK_STATE_SELECTED);
 734 }
 735
 736 static void
 737 gtk_real_tree_item_deselect (GtkItem *item)
 738 {
 739   GtkTreeItem *tree_item;
 740   GtkWidget *widget;
 741
 742   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 743
 744   tree_item = GTK_TREE_ITEM (item);
 745   widget = GTK_WIDGET (item);
 746
 747   gtk_widget_set_state (widget, GTK_STATE_NORMAL);
 748
 749   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 750     gtk_widget_set_state (tree_item->pixmaps_box, GTK_STATE_NORMAL);
 751 }
 752
 753 static void
 754 gtk_real_tree_item_toggle (GtkItem *item)
 755 {
 756   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 757
 758   if(!GTK_WIDGET_IS_SENSITIVE(item))
 759     return;
 760
 761   if (GTK_WIDGET (item)->parent && GTK_IS_TREE (GTK_WIDGET (item)->parent))
 762     gtk_tree_select_child (GTK_TREE (GTK_WIDGET (item)->parent),
 763                            GTK_WIDGET (item));
 764   else
 765     {
 766       /* Should we really bother with this bit? A listitem not in a list?
 767        * -Johannes Keukelaar
 768        * yes, always be on the safe side!
 769        * -timj
 770        */
 771       if (GTK_WIDGET (item)->state == GTK_STATE_SELECTED)
 772         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_NORMAL);
 773       else
 774         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 775     }
 776 }
 777
 778 static void
 779 gtk_real_tree_item_expand (GtkTreeItem *tree_item)
 780 {
 781   GtkTree* tree;
 782
 783   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 784
 785   if (tree_item->subtree && !tree_item->expanded)
 786     {
 787       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 788
 789       /* hide subtree widget */
 790       gtk_widget_show (tree_item->subtree);
 791
 792       /* hide button '+' and show button '-' */
 793       if (tree_item->pixmaps_box)
 794         {
 795           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 796                                 tree_item->plus_pix_widget);
 797           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 798                              tree_item->minus_pix_widget);
 799         }
 800       if (tree->root_tree)
 801         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 802       tree_item->expanded = TRUE;
 803     }
 804 }
 805
 806 static void
 807 gtk_real_tree_item_collapse (GtkTreeItem *tree_item)
 808 {
 809   GtkTree* tree;
 810
 811   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 812
 813   if (tree_item->subtree && tree_item->expanded)
 814     {
 815       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 816
 817       /* hide subtree widget */
 818       gtk_widget_hide (tree_item->subtree);
 819
 820       /* hide button '-' and show button '+' */
 821       if (tree_item->pixmaps_box)
 822         {
 823           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 824                                 tree_item->minus_pix_widget);
 825           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 826                              tree_item->plus_pix_widget);
 827         }
 828       if (tree->root_tree)
 829         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 830       tree_item->expanded = FALSE;
 831     }
 832 }
 833
 834 static void
 835 gtk_tree_item_destroy (GtkObject *object)
 836 {
 837   GtkTreeItem* item;
 838   GtkWidget* child;
 839
 840   g_return_if_fail (GTK_IS_TREE_ITEM (object));
 841
 842 #ifdef TREE_DEBUG
 843   g_message("+ gtk_tree_item_destroy [object %#x]\n", (int)object);
 844 #endif /* TREE_DEBUG */
 845
 846   item = GTK_TREE_ITEM(object);
 847
 848   /* free sub tree if it exist */
 849   child = item->subtree;
 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->subtree = NULL;
 857     }
 858
 859   /* free pixmaps box */
 860   child = item->pixmaps_box;
 861   if (child)
 862     {
 863       gtk_widget_ref (child);
 864       gtk_widget_unparent (child);
 865       gtk_widget_destroy (child);
 866       gtk_widget_unref (child);
 867       item->pixmaps_box = NULL;
 868     }
 869
 870
 871   /* destroy plus pixmap */
 872   if (item->plus_pix_widget)
 873     {
 874       gtk_widget_destroy (item->plus_pix_widget);
 875       gtk_widget_unref (item->plus_pix_widget);
 876       item->plus_pix_widget = NULL;
 877     }
 878
 879   /* destroy minus pixmap */
 880   if (item->minus_pix_widget)
 881     {
 882       gtk_widget_destroy (item->minus_pix_widget);
 883       gtk_widget_unref (item->minus_pix_widget);
 884       item->minus_pix_widget = NULL;
 885     }
 886
 887   /* By removing the pixmaps here, and not in unrealize, we depend on
 888    * the fact that a widget can never change colormap or visual.
 889    */
 890   gtk_tree_item_remove_pixmaps (item);
 891
 892   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 893
 894 #ifdef TREE_DEBUG
 895   g_message("- gtk_tree_item_destroy\n");
 896 #endif /* TREE_DEBUG */
 897 }
 898
 899 void
 900 gtk_tree_item_remove_subtree (GtkTreeItem* item)
 901 {
 902   g_return_if_fail (GTK_IS_TREE_ITEM(item));
 903   g_return_if_fail (item->subtree != NULL);
 904
 905   if (GTK_TREE (item->subtree)->children)
 906     {
 907       /* The following call will remove the children and call
 908        * gtk_tree_item_remove_subtree() again. So we are done.
 909        */
 910       gtk_tree_remove_items (GTK_TREE (item->subtree),
 911                              GTK_TREE (item->subtree)->children);
 912       return;
 913     }
 914
 915   if (GTK_WIDGET_MAPPED (item->subtree))
 916     gtk_widget_unmap (item->subtree);
 917
 918   gtk_widget_unparent (item->subtree);
 919
 920   if (item->pixmaps_box)
 921     gtk_widget_hide (item->pixmaps_box);
 922
 923   item->subtree = NULL;
 924
 925   if (item->expanded)
 926     {
 927       item->expanded = FALSE;
 928       if (item->pixmaps_box)
 929         {
 930           gtk_container_remove (GTK_CONTAINER (item->pixmaps_box),
 931                                 item->minus_pix_widget);
 932           gtk_container_add (GTK_CONTAINER (item->pixmaps_box),
 933                              item->plus_pix_widget);
 934         }
 935     }
 936 }
 937
 938 static void
 939 gtk_tree_item_map (GtkWidget *widget)
 940 {
 941   GtkBin *bin;
 942   GtkTreeItem* item;
 943
 944   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 945
 946   bin = GTK_BIN (widget);
 947   item = GTK_TREE_ITEM(widget);
 948
 949   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 950
 951   if(item->pixmaps_box &&
 952      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
 953      !GTK_WIDGET_MAPPED (item->pixmaps_box))
 954     gtk_widget_map (item->pixmaps_box);
 955
 956   if (bin->child &&
 957       GTK_WIDGET_VISIBLE (bin->child) &&
 958       !GTK_WIDGET_MAPPED (bin->child))
 959     gtk_widget_map (bin->child);
 960
 961   gdk_window_show (widget->window);
 962 }
 963
 964 static void
 965 gtk_tree_item_unmap (GtkWidget *widget)
 966 {
 967   GtkBin *bin;
 968   GtkTreeItem* item;
 969
 970   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 971
 972   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
 973   bin = GTK_BIN (widget);
 974   item = GTK_TREE_ITEM(widget);
 975
 976   gdk_window_hide (widget->window);
 977
 978   if(item->pixmaps_box &&
 979      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
 980      GTK_WIDGET_MAPPED (item->pixmaps_box))
 981     gtk_widget_unmap (bin->child);
 982
 983   if (bin->child &&
 984       GTK_WIDGET_VISIBLE (bin->child) &&
 985       GTK_WIDGET_MAPPED (bin->child))
 986     gtk_widget_unmap (bin->child);
 987 }
 988
 989 static void
 990 gtk_tree_item_forall (GtkContainer *container,
 991                       gboolean      include_internals,
 992                       GtkCallback   callback,
 993                       gpointer      callback_data)
 994 {
 995   GtkBin *bin;
 996   GtkTreeItem *tree_item;
 997
 998   g_return_if_fail (GTK_IS_TREE_ITEM (container));
 999   g_return_if_fail (callback != NULL);
1000
1001   bin = GTK_BIN (container);
1002   tree_item = GTK_TREE_ITEM (container);
1003
1004   if (bin->child)
1005     (* callback) (bin->child, callback_data);
1006   if (include_internals && tree_item->subtree)
1007     (* callback) (tree_item->subtree, callback_data);
1008 }