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 "gtkmarshalers.h"
  32 #include "gtksignal.h"
  33 #define GTK_ENABLE_BROKEN
  34 #include "gtktree.h"
  35 #include "gtktreeitem.h"
  36
  37 #include "tree_plus.xpm"
  38 #include "tree_minus.xpm"
  39
  40 #define DEFAULT_DELTA 9
  41
  42 enum {
  43   COLLAPSE_TREE,
  44   EXPAND_TREE,
  45   LAST_SIGNAL
  46 };
  47
  48 typedef struct _GtkTreePixmaps GtkTreePixmaps;
  49
  50 struct _GtkTreePixmaps {
  51   gint refcount;
  52   GdkColormap *colormap;
  53
  54   GdkPixmap *pixmap_plus;
  55   GdkPixmap *pixmap_minus;
  56   GdkBitmap *mask_plus;
  57   GdkBitmap *mask_minus;
  58 };
  59
  60 static GList *pixmaps = NULL;
  61
  62 static void gtk_tree_item_class_init (GtkTreeItemClass *klass);
  63 static void gtk_tree_item_init       (GtkTreeItem      *tree_item);
  64 static void gtk_tree_item_realize       (GtkWidget        *widget);
  65 static void gtk_tree_item_size_request  (GtkWidget        *widget,
  66                                          GtkRequisition   *requisition);
  67 static void gtk_tree_item_size_allocate (GtkWidget        *widget,
  68                                          GtkAllocation    *allocation);
  69 static void gtk_tree_item_paint         (GtkWidget        *widget,
  70                                          GdkRectangle     *area);
  71 static gint gtk_tree_item_button_press  (GtkWidget        *widget,
  72                                          GdkEventButton   *event);
  73 static gint gtk_tree_item_expose        (GtkWidget        *widget,
  74                                          GdkEventExpose   *event);
  75 static void gtk_tree_item_forall        (GtkContainer    *container,
  76                                          gboolean         include_internals,
  77                                          GtkCallback      callback,
  78                                          gpointer         callback_data);
  79
  80 static void gtk_real_tree_item_select   (GtkItem          *item);
  81 static void gtk_real_tree_item_deselect (GtkItem          *item);
  82 static void gtk_real_tree_item_toggle   (GtkItem          *item);
  83 static void gtk_real_tree_item_expand   (GtkTreeItem      *item);
  84 static void gtk_real_tree_item_collapse (GtkTreeItem      *item);
  85 static void gtk_real_tree_item_expand   (GtkTreeItem      *item);
  86 static void gtk_real_tree_item_collapse (GtkTreeItem      *item);
  87 static void gtk_tree_item_destroy        (GtkObject *object);
  88 static gint gtk_tree_item_subtree_button_click (GtkWidget *widget);
  89 static void gtk_tree_item_subtree_button_changed_state (GtkWidget *widget);
  90
  91 static void gtk_tree_item_map(GtkWidget*);
  92 static void gtk_tree_item_unmap(GtkWidget*);
  93
  94 static void gtk_tree_item_add_pixmaps    (GtkTreeItem       *tree_item);
  95 static void gtk_tree_item_remove_pixmaps (GtkTreeItem       *tree_item);
  96
  97 static GtkItemClass *parent_class = NULL;
  98 static guint tree_item_signals[LAST_SIGNAL] = { 0 };
  99
 100 GtkType
 101 gtk_tree_item_get_type (void)
 102 {
 103   static GtkType tree_item_type = 0;
 104
 105   if (!tree_item_type)
 106     {
 107       static const GtkTypeInfo tree_item_info =
 108       {
 109         "GtkTreeItem",
 110         sizeof (GtkTreeItem),
 111         sizeof (GtkTreeItemClass),
 112         (GtkClassInitFunc) gtk_tree_item_class_init,
 113         (GtkObjectInitFunc) gtk_tree_item_init,
 114         /* reserved_1 */ NULL,
 115         /* reserved_2 */ NULL,
 116         (GtkClassInitFunc) NULL,
 117       };
 118
 119       tree_item_type = gtk_type_unique (gtk_item_get_type (), &tree_item_info);
 120     }
 121
 122   return tree_item_type;
 123 }
 124
 125 static void
 126 gtk_tree_item_class_init (GtkTreeItemClass *class)
 127 {
 128   GtkObjectClass *object_class;
 129   GtkWidgetClass *widget_class;
 130   GtkContainerClass *container_class;
 131   GtkItemClass *item_class;
 132
 133   parent_class = gtk_type_class (GTK_TYPE_ITEM);
 134
 135   object_class = (GtkObjectClass*) class;
 136   widget_class = (GtkWidgetClass*) class;
 137   item_class = (GtkItemClass*) class;
 138   container_class = (GtkContainerClass*) class;
 139
 140   object_class->destroy = gtk_tree_item_destroy;
 141
 142   widget_class->realize = gtk_tree_item_realize;
 143   widget_class->size_request = gtk_tree_item_size_request;
 144   widget_class->size_allocate = gtk_tree_item_size_allocate;
 145   widget_class->button_press_event = gtk_tree_item_button_press;
 146   widget_class->expose_event = gtk_tree_item_expose;
 147   widget_class->map = gtk_tree_item_map;
 148   widget_class->unmap = gtk_tree_item_unmap;
 149
 150   container_class->forall = gtk_tree_item_forall;
 151
 152   item_class->select = gtk_real_tree_item_select;
 153   item_class->deselect = gtk_real_tree_item_deselect;
 154   item_class->toggle = gtk_real_tree_item_toggle;
 155
 156   class->expand = gtk_real_tree_item_expand;
 157   class->collapse = gtk_real_tree_item_collapse;
 158
 159   tree_item_signals[EXPAND_TREE] =
 160     gtk_signal_new ("expand",
 161                     GTK_RUN_FIRST,
 162                     GTK_CLASS_TYPE (object_class),
 163                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, expand),
 164                     _gtk_marshal_VOID__VOID,
 165                     GTK_TYPE_NONE, 0);
 166   tree_item_signals[COLLAPSE_TREE] =
 167     gtk_signal_new ("collapse",
 168                     GTK_RUN_FIRST,
 169                     GTK_CLASS_TYPE (object_class),
 170                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, collapse),
 171                     _gtk_marshal_VOID__VOID,
 172                     GTK_TYPE_NONE, 0);
 173 }
 174
 175 /* callback for event box mouse event */
 176 static gint
 177 gtk_tree_item_subtree_button_click (GtkWidget *widget)
 178 {
 179   GtkTreeItem* item;
 180
 181   g_return_val_if_fail (GTK_IS_EVENT_BOX (widget), FALSE);
 182
 183   item = (GtkTreeItem*) gtk_object_get_user_data (GTK_OBJECT (widget));
 184   if (!GTK_WIDGET_IS_SENSITIVE (item))
 185     return FALSE;
 186
 187   if (item->expanded)
 188     gtk_tree_item_collapse (item);
 189   else
 190     gtk_tree_item_expand (item);
 191
 192   return TRUE;
 193 }
 194
 195 /* callback for event box state changed */
 196 static void
 197 gtk_tree_item_subtree_button_changed_state (GtkWidget *widget)
 198 {
 199   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 200
 201   if (GTK_WIDGET_VISIBLE (widget))
 202     {
 203
 204       if (widget->state == GTK_STATE_NORMAL)
 205         gdk_window_set_background (widget->window, &widget->style->base[widget->state]);
 206       else
 207         gdk_window_set_background (widget->window, &widget->style->bg[widget->state]);
 208
 209       if (GTK_WIDGET_DRAWABLE (widget))
 210         gdk_window_clear_area (widget->window, 0, 0,
 211                                widget->allocation.width, widget->allocation.height);
 212     }
 213 }
 214
 215 static void
 216 gtk_tree_item_init (GtkTreeItem *tree_item)
 217 {
 218   GtkWidget *eventbox, *pixmapwid;
 219
 220   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 221
 222   tree_item->expanded = FALSE;
 223   tree_item->subtree = NULL;
 224   GTK_WIDGET_SET_FLAGS (tree_item, GTK_CAN_FOCUS);
 225
 226   /* create an event box containing one pixmaps */
 227   eventbox = gtk_event_box_new();
 228   gtk_widget_set_events (eventbox, GDK_BUTTON_PRESS_MASK);
 229   gtk_signal_connect(GTK_OBJECT(eventbox), "state_changed",
 230                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 231                      (gpointer)NULL);
 232   gtk_signal_connect(GTK_OBJECT(eventbox), "realize",
 233                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 234                      (gpointer)NULL);
 235   gtk_signal_connect(GTK_OBJECT(eventbox), "button_press_event",
 236                      (GtkSignalFunc)gtk_tree_item_subtree_button_click,
 237                      (gpointer)NULL);
 238   gtk_object_set_user_data(GTK_OBJECT(eventbox), tree_item);
 239   tree_item->pixmaps_box = eventbox;
 240
 241   /* create pixmap for button '+' */
 242   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 243   if (!tree_item->expanded)
 244     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 245   gtk_widget_show (pixmapwid);
 246   tree_item->plus_pix_widget = pixmapwid;
 247   gtk_widget_ref (tree_item->plus_pix_widget);
 248   gtk_object_sink (GTK_OBJECT (tree_item->plus_pix_widget));
 249
 250   /* create pixmap for button '-' */
 251   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 252   if (tree_item->expanded)
 253     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 254   gtk_widget_show (pixmapwid);
 255   tree_item->minus_pix_widget = pixmapwid;
 256   gtk_widget_ref (tree_item->minus_pix_widget);
 257   gtk_object_sink (GTK_OBJECT (tree_item->minus_pix_widget));
 258
 259   gtk_widget_set_parent (eventbox, GTK_WIDGET (tree_item));
 260 }
 261
 262
 263 GtkWidget*
 264 gtk_tree_item_new (void)
 265 {
 266   GtkWidget *tree_item;
 267
 268   tree_item = GTK_WIDGET (gtk_type_new (gtk_tree_item_get_type ()));
 269
 270   return tree_item;
 271 }
 272
 273 GtkWidget*
 274 gtk_tree_item_new_with_label (const gchar *label)
 275 {
 276   GtkWidget *tree_item;
 277   GtkWidget *label_widget;
 278
 279   tree_item = gtk_tree_item_new ();
 280   label_widget = gtk_label_new (label);
 281   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 282
 283   gtk_container_add (GTK_CONTAINER (tree_item), label_widget);
 284   gtk_widget_show (label_widget);
 285
 286
 287   return tree_item;
 288 }
 289
 290 void
 291 gtk_tree_item_set_subtree (GtkTreeItem *tree_item,
 292                            GtkWidget   *subtree)
 293 {
 294   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 295   g_return_if_fail (GTK_IS_TREE (subtree));
 296
 297   if (tree_item->subtree)
 298     {
 299       g_warning("there is already a subtree for this tree item\n");
 300       return;
 301     }
 302
 303   tree_item->subtree = subtree;
 304   GTK_TREE (subtree)->tree_owner = GTK_WIDGET (tree_item);
 305
 306   /* show subtree button */
 307   if (tree_item->pixmaps_box)
 308     gtk_widget_show (tree_item->pixmaps_box);
 309
 310   if (tree_item->expanded)
 311     gtk_widget_show (subtree);
 312   else
 313     gtk_widget_hide (subtree);
 314
 315   gtk_widget_set_parent (subtree, GTK_WIDGET (tree_item)->parent);
 316 }
 317
 318 void
 319 gtk_tree_item_select (GtkTreeItem *tree_item)
 320 {
 321   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 322
 323   gtk_item_select (GTK_ITEM (tree_item));
 324 }
 325
 326 void
 327 gtk_tree_item_deselect (GtkTreeItem *tree_item)
 328 {
 329   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 330
 331   gtk_item_deselect (GTK_ITEM (tree_item));
 332 }
 333
 334 void
 335 gtk_tree_item_expand (GtkTreeItem *tree_item)
 336 {
 337   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 338
 339   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[EXPAND_TREE], NULL);
 340 }
 341
 342 void
 343 gtk_tree_item_collapse (GtkTreeItem *tree_item)
 344 {
 345   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 346
 347   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[COLLAPSE_TREE], NULL);
 348 }
 349
 350 static void
 351 gtk_tree_item_add_pixmaps (GtkTreeItem *tree_item)
 352 {
 353   GList *tmp_list;
 354   GdkColormap *colormap;
 355   GtkTreePixmaps *pixmap_node = NULL;
 356
 357   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 358
 359   if (tree_item->pixmaps)
 360     return;
 361
 362   colormap = gtk_widget_get_colormap (GTK_WIDGET (tree_item));
 363
 364   tmp_list = pixmaps;
 365   while (tmp_list)
 366     {
 367       pixmap_node = (GtkTreePixmaps *)tmp_list->data;
 368
 369       if (pixmap_node->colormap == colormap)
 370         break;
 371
 372       tmp_list = tmp_list->next;
 373     }
 374
 375   if (tmp_list)
 376     {
 377       pixmap_node->refcount++;
 378       tree_item->pixmaps = tmp_list;
 379     }
 380   else
 381     {
 382       pixmap_node = g_new (GtkTreePixmaps, 1);
 383
 384       pixmap_node->colormap = colormap;
 385       gdk_colormap_ref (colormap);
 386
 387       pixmap_node->refcount = 1;
 388
 389       /* create pixmaps for plus icon */
 390       pixmap_node->pixmap_plus =
 391         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 392                                       &pixmap_node->mask_plus,
 393                                       NULL,
 394                                       tree_plus);
 395
 396       /* create pixmaps for minus icon */
 397       pixmap_node->pixmap_minus =
 398         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 399                                       &pixmap_node->mask_minus,
 400                                       NULL,
 401                                       tree_minus);
 402
 403       tree_item->pixmaps = pixmaps = g_list_prepend (pixmaps, pixmap_node);
 404     }
 405
 406   gtk_pixmap_set (GTK_PIXMAP (tree_item->plus_pix_widget),
 407                   pixmap_node->pixmap_plus, pixmap_node->mask_plus);
 408   gtk_pixmap_set (GTK_PIXMAP (tree_item->minus_pix_widget),
 409                   pixmap_node->pixmap_minus, pixmap_node->mask_minus);
 410 }
 411
 412 static void
 413 gtk_tree_item_remove_pixmaps (GtkTreeItem *tree_item)
 414 {
 415   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 416
 417   if (tree_item->pixmaps)
 418     {
 419       GtkTreePixmaps *pixmap_node = (GtkTreePixmaps *)tree_item->pixmaps->data;
 420
 421       g_assert (pixmap_node->refcount > 0);
 422
 423       if (--pixmap_node->refcount == 0)
 424         {
 425           gdk_colormap_unref (pixmap_node->colormap);
 426           gdk_pixmap_unref (pixmap_node->pixmap_plus);
 427           gdk_bitmap_unref (pixmap_node->mask_plus);
 428           gdk_pixmap_unref (pixmap_node->pixmap_minus);
 429           gdk_bitmap_unref (pixmap_node->mask_minus);
 430
 431           pixmaps = g_list_remove_link (pixmaps, tree_item->pixmaps);
 432           g_list_free_1 (tree_item->pixmaps);
 433           g_free (pixmap_node);
 434         }
 435
 436       tree_item->pixmaps = NULL;
 437     }
 438 }
 439
 440 static void
 441 gtk_tree_item_realize (GtkWidget *widget)
 442 {
 443   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 444
 445   if (GTK_WIDGET_CLASS (parent_class)->realize)
 446     (* GTK_WIDGET_CLASS (parent_class)->realize) (widget);
 447
 448   gdk_window_set_background (widget->window,
 449                              &widget->style->base[GTK_STATE_NORMAL]);
 450
 451   gtk_tree_item_add_pixmaps (GTK_TREE_ITEM (widget));
 452 }
 453
 454 static void
 455 gtk_tree_item_size_request (GtkWidget      *widget,
 456                             GtkRequisition *requisition)
 457 {
 458   GtkBin *bin;
 459   GtkTreeItem* item;
 460   GtkRequisition child_requisition;
 461
 462   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 463   g_return_if_fail (requisition != NULL);
 464
 465   bin = GTK_BIN (widget);
 466   item = GTK_TREE_ITEM(widget);
 467
 468   requisition->width = (GTK_CONTAINER (widget)->border_width +
 469                         widget->style->xthickness) * 2;
 470   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 471
 472   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 473     {
 474       GtkRequisition pix_requisition;
 475
 476       gtk_widget_size_request (bin->child, &child_requisition);
 477
 478       requisition->width += child_requisition.width;
 479
 480       gtk_widget_size_request (item->pixmaps_box,
 481                                &pix_requisition);
 482       requisition->width += pix_requisition.width + DEFAULT_DELTA +
 483         GTK_TREE (widget->parent)->current_indent;
 484
 485       requisition->height += MAX (child_requisition.height,
 486                                   pix_requisition.height);
 487     }
 488 }
 489
 490 static void
 491 gtk_tree_item_size_allocate (GtkWidget     *widget,
 492                              GtkAllocation *allocation)
 493 {
 494   GtkBin *bin;
 495   GtkTreeItem* item;
 496   GtkAllocation child_allocation;
 497   gint border_width;
 498   int temp;
 499
 500   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 501   g_return_if_fail (allocation != NULL);
 502
 503   widget->allocation = *allocation;
 504   if (GTK_WIDGET_REALIZED (widget))
 505     gdk_window_move_resize (widget->window,
 506                             allocation->x, allocation->y,
 507                             allocation->width, allocation->height);
 508
 509   bin = GTK_BIN (widget);
 510   item = GTK_TREE_ITEM(widget);
 511
 512   if (bin->child)
 513     {
 514       border_width = (GTK_CONTAINER (widget)->border_width +
 515                       widget->style->xthickness);
 516
 517       child_allocation.x = border_width + GTK_TREE(widget->parent)->current_indent;
 518       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 519
 520       child_allocation.width = item->pixmaps_box->requisition.width;
 521       child_allocation.height = item->pixmaps_box->requisition.height;
 522
 523       temp = allocation->height - child_allocation.height;
 524       child_allocation.y += ( temp / 2 ) + ( temp % 2 );
 525
 526       gtk_widget_size_allocate (item->pixmaps_box, &child_allocation);
 527
 528       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 529       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 530       child_allocation.x += item->pixmaps_box->requisition.width+DEFAULT_DELTA;
 531
 532       child_allocation.width =
 533         MAX (1, (gint)allocation->width - ((gint)child_allocation.x + border_width));
 534
 535       gtk_widget_size_allocate (bin->child, &child_allocation);
 536     }
 537 }
 538
 539 static void
 540 gtk_tree_item_draw_lines (GtkWidget *widget)
 541 {
 542   GtkTreeItem* item;
 543   GtkTree* tree;
 544   guint lx1, ly1, lx2, ly2;
 545   GdkGC* gc;
 546
 547   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 548
 549   item = GTK_TREE_ITEM(widget);
 550   tree = GTK_TREE(widget->parent);
 551
 552   if (!tree->view_line)
 553     return;
 554
 555   gc = widget->style->text_gc[GTK_STATE_NORMAL];
 556
 557   /* draw vertical line */
 558   lx1 = item->pixmaps_box->allocation.width;
 559   lx1 = lx2 = ((lx1 / 2) + (lx1 % 2) +
 560                GTK_CONTAINER (widget)->border_width + 1 + tree->current_indent);
 561   ly1 = 0;
 562   ly2 = widget->allocation.height;
 563
 564   if (g_list_last (tree->children)->data == widget)
 565     ly2 = (ly2 / 2) + (ly2 % 2);
 566
 567   if (tree != tree->root_tree)
 568     gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 569
 570   /* draw vertical line for subtree connecting */
 571   if(g_list_last(tree->children)->data != (gpointer)widget)
 572     ly2 = (ly2 / 2) + (ly2 % 2);
 573
 574   lx2 += DEFAULT_DELTA;
 575
 576   if (item->subtree && item->expanded)
 577     gdk_draw_line (widget->window, gc,
 578                    lx2, ly2, lx2, widget->allocation.height);
 579
 580   /* draw horizontal line */
 581   ly1 = ly2;
 582   lx2 += 2;
 583
 584   gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 585
 586   lx2 -= DEFAULT_DELTA+2;
 587   ly1 = 0;
 588   ly2 = widget->allocation.height;
 589
 590   if (tree != tree->root_tree)
 591     {
 592       item = GTK_TREE_ITEM (tree->tree_owner);
 593       tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 594       while (tree != tree->root_tree)
 595         {
 596           lx1 = lx2 -= tree->indent_value;
 597
 598           if (g_list_last (tree->children)->data != item)
 599             gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 600           item = GTK_TREE_ITEM (tree->tree_owner);
 601           tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 602         }
 603     }
 604 }
 605
 606 static void
 607 gtk_tree_item_paint (GtkWidget    *widget,
 608                      GdkRectangle *area)
 609 {
 610   GtkBin *bin;
 611   GdkRectangle child_area, item_area;
 612   GtkTreeItem* tree_item;
 613
 614   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 615   g_return_if_fail (area != NULL);
 616
 617   /* FIXME: We should honor tree->view_mode, here - I think
 618    * the desired effect is that when the mode is VIEW_ITEM,
 619    * only the subitem is drawn as selected, not the entire
 620    * line. (Like the way that the tree in Windows Explorer
 621    * works).
 622    */
 623   if (GTK_WIDGET_DRAWABLE (widget))
 624     {
 625       bin = GTK_BIN (widget);
 626       tree_item = GTK_TREE_ITEM(widget);
 627
 628       if (widget->state == GTK_STATE_NORMAL)
 629         {
 630           gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 631           gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
 632         }
 633       else
 634         {
 635           if (!GTK_WIDGET_IS_SENSITIVE (widget))
 636             gtk_paint_flat_box(widget->style, widget->window,
 637                                widget->state, GTK_SHADOW_NONE,
 638                                area, widget, "treeitem",
 639                                0, 0, -1, -1);
 640           else
 641             gtk_paint_flat_box(widget->style, widget->window,
 642                                widget->state, GTK_SHADOW_ETCHED_OUT,
 643                                area, widget, "treeitem",
 644                                0, 0, -1, -1);
 645         }
 646
 647       /* draw left size of tree item */
 648       item_area.x = 0;
 649       item_area.y = 0;
 650       item_area.width = (tree_item->pixmaps_box->allocation.width + DEFAULT_DELTA +
 651                          GTK_TREE (widget->parent)->current_indent + 2);
 652       item_area.height = widget->allocation.height;
 653
 654
 655       if (gdk_rectangle_intersect(&item_area, area, &child_area))
 656         {
 657
 658           gtk_tree_item_draw_lines(widget);
 659
 660           if (tree_item->pixmaps_box &&
 661               GTK_WIDGET_VISIBLE(tree_item->pixmaps_box) &&
 662               gtk_widget_intersect (tree_item->pixmaps_box, area, &child_area))
 663             gtk_widget_draw (tree_item->pixmaps_box, &child_area);
 664         }
 665
 666       if (GTK_WIDGET_HAS_FOCUS (widget))
 667         gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget),
 668                          NULL, widget, "treeitem",
 669                          0, 0,
 670                          widget->allocation.width,
 671                          widget->allocation.height);
 672
 673     }
 674 }
 675
 676 static gint
 677 gtk_tree_item_button_press (GtkWidget      *widget,
 678                             GdkEventButton *event)
 679 {
 680
 681   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 682   g_return_val_if_fail (event != NULL, FALSE);
 683
 684   if (event->type == GDK_BUTTON_PRESS
 685         && GTK_WIDGET_IS_SENSITIVE(widget)
 686         && !GTK_WIDGET_HAS_FOCUS (widget))
 687       gtk_widget_grab_focus (widget);
 688
 689   return (event->type == GDK_BUTTON_PRESS && GTK_WIDGET_IS_SENSITIVE(widget));
 690 }
 691
 692 static void
 693 gtk_tree_item_expose_child (GtkWidget *child,
 694                             gpointer   client_data)
 695 {
 696   struct {
 697     GtkWidget *container;
 698     GdkEventExpose *event;
 699   } *data = client_data;
 700
 701   if (GTK_WIDGET_DRAWABLE (child) &&
 702       GTK_WIDGET_NO_WINDOW (child) &&
 703       (child->window == data->event->window))
 704     {
 705       GdkEvent *child_event = gdk_event_new (GDK_EXPOSE);
 706       child_event->expose = *data->event;
 707       g_object_ref (child_event->expose.window);
 708
 709       child_event->expose.region = gtk_widget_region_intersect (child,
 710                                                                 data->event->region);
 711       if (!gdk_region_empty (child_event->expose.region))
 712         {
 713           gdk_region_get_clipbox (child_event->expose.region, &child_event->expose.area);
 714           gtk_widget_send_expose (child, child_event);
 715         }
 716       gdk_event_free (child_event);
 717     }
 718 }
 719
 720 static gint
 721 gtk_tree_item_expose (GtkWidget      *widget,
 722                       GdkEventExpose *event)
 723 {
 724   struct {
 725     GtkWidget *container;
 726     GdkEventExpose *event;
 727   } data;
 728
 729   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 730   g_return_val_if_fail (event != NULL, FALSE);
 731
 732   if (GTK_WIDGET_DRAWABLE (widget))
 733     {
 734       gtk_tree_item_paint (widget, &event->area);
 735
 736       data.container = widget;
 737       data.event = event;
 738
 739       gtk_container_forall (GTK_CONTAINER (widget),
 740                             gtk_tree_item_expose_child,
 741                             &data);
 742    }
 743
 744   return FALSE;
 745 }
 746
 747 static void
 748 gtk_real_tree_item_select (GtkItem *item)
 749 {
 750   GtkTreeItem *tree_item;
 751   GtkWidget *widget;
 752
 753   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 754
 755   tree_item = GTK_TREE_ITEM (item);
 756   widget = GTK_WIDGET (item);
 757
 758   gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 759
 760   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 761     gtk_widget_set_state (GTK_TREE_ITEM (item)->pixmaps_box, GTK_STATE_SELECTED);
 762 }
 763
 764 static void
 765 gtk_real_tree_item_deselect (GtkItem *item)
 766 {
 767   GtkTreeItem *tree_item;
 768   GtkWidget *widget;
 769
 770   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 771
 772   tree_item = GTK_TREE_ITEM (item);
 773   widget = GTK_WIDGET (item);
 774
 775   gtk_widget_set_state (widget, GTK_STATE_NORMAL);
 776
 777   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 778     gtk_widget_set_state (tree_item->pixmaps_box, GTK_STATE_NORMAL);
 779 }
 780
 781 static void
 782 gtk_real_tree_item_toggle (GtkItem *item)
 783 {
 784   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 785
 786   if(!GTK_WIDGET_IS_SENSITIVE(item))
 787     return;
 788
 789   if (GTK_WIDGET (item)->parent && GTK_IS_TREE (GTK_WIDGET (item)->parent))
 790     gtk_tree_select_child (GTK_TREE (GTK_WIDGET (item)->parent),
 791                            GTK_WIDGET (item));
 792   else
 793     {
 794       /* Should we really bother with this bit? A listitem not in a list?
 795        * -Johannes Keukelaar
 796        * yes, always be on the safe side!
 797        * -timj
 798        */
 799       if (GTK_WIDGET (item)->state == GTK_STATE_SELECTED)
 800         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_NORMAL);
 801       else
 802         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 803     }
 804 }
 805
 806 static void
 807 gtk_real_tree_item_expand (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_show (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->plus_pix_widget);
 825           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 826                              tree_item->minus_pix_widget);
 827         }
 828       if (tree->root_tree)
 829         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 830       tree_item->expanded = TRUE;
 831     }
 832 }
 833
 834 static void
 835 gtk_real_tree_item_collapse (GtkTreeItem *tree_item)
 836 {
 837   GtkTree* tree;
 838
 839   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 840
 841   if (tree_item->subtree && tree_item->expanded)
 842     {
 843       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 844
 845       /* hide subtree widget */
 846       gtk_widget_hide (tree_item->subtree);
 847
 848       /* hide button '-' and show button '+' */
 849       if (tree_item->pixmaps_box)
 850         {
 851           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 852                                 tree_item->minus_pix_widget);
 853           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 854                              tree_item->plus_pix_widget);
 855         }
 856       if (tree->root_tree)
 857         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 858       tree_item->expanded = FALSE;
 859     }
 860 }
 861
 862 static void
 863 gtk_tree_item_destroy (GtkObject *object)
 864 {
 865   GtkTreeItem* item;
 866   GtkWidget* child;
 867
 868   g_return_if_fail (GTK_IS_TREE_ITEM (object));
 869
 870 #ifdef TREE_DEBUG
 871   g_message("+ gtk_tree_item_destroy [object %#x]\n", (int)object);
 872 #endif /* TREE_DEBUG */
 873
 874   item = GTK_TREE_ITEM(object);
 875
 876   /* free sub tree if it exist */
 877   child = item->subtree;
 878   if (child)
 879     {
 880       gtk_widget_ref (child);
 881       gtk_widget_unparent (child);
 882       gtk_widget_destroy (child);
 883       gtk_widget_unref (child);
 884       item->subtree = NULL;
 885     }
 886
 887   /* free pixmaps box */
 888   child = item->pixmaps_box;
 889   if (child)
 890     {
 891       gtk_widget_ref (child);
 892       gtk_widget_unparent (child);
 893       gtk_widget_destroy (child);
 894       gtk_widget_unref (child);
 895       item->pixmaps_box = NULL;
 896     }
 897
 898
 899   /* destroy plus pixmap */
 900   if (item->plus_pix_widget)
 901     {
 902       gtk_widget_destroy (item->plus_pix_widget);
 903       gtk_widget_unref (item->plus_pix_widget);
 904       item->plus_pix_widget = NULL;
 905     }
 906
 907   /* destroy minus pixmap */
 908   if (item->minus_pix_widget)
 909     {
 910       gtk_widget_destroy (item->minus_pix_widget);
 911       gtk_widget_unref (item->minus_pix_widget);
 912       item->minus_pix_widget = NULL;
 913     }
 914
 915   /* By removing the pixmaps here, and not in unrealize, we depend on
 916    * the fact that a widget can never change colormap or visual.
 917    */
 918   gtk_tree_item_remove_pixmaps (item);
 919
 920   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 921
 922 #ifdef TREE_DEBUG
 923   g_message("- gtk_tree_item_destroy\n");
 924 #endif /* TREE_DEBUG */
 925 }
 926
 927 void
 928 gtk_tree_item_remove_subtree (GtkTreeItem* item)
 929 {
 930   g_return_if_fail (GTK_IS_TREE_ITEM(item));
 931   g_return_if_fail (item->subtree != NULL);
 932
 933   if (GTK_TREE (item->subtree)->children)
 934     {
 935       /* The following call will remove the children and call
 936        * gtk_tree_item_remove_subtree() again. So we are done.
 937        */
 938       gtk_tree_remove_items (GTK_TREE (item->subtree),
 939                              GTK_TREE (item->subtree)->children);
 940       return;
 941     }
 942
 943   if (GTK_WIDGET_MAPPED (item->subtree))
 944     gtk_widget_unmap (item->subtree);
 945
 946   gtk_widget_unparent (item->subtree);
 947
 948   if (item->pixmaps_box)
 949     gtk_widget_hide (item->pixmaps_box);
 950
 951   item->subtree = NULL;
 952
 953   if (item->expanded)
 954     {
 955       item->expanded = FALSE;
 956       if (item->pixmaps_box)
 957         {
 958           gtk_container_remove (GTK_CONTAINER (item->pixmaps_box),
 959                                 item->minus_pix_widget);
 960           gtk_container_add (GTK_CONTAINER (item->pixmaps_box),
 961                              item->plus_pix_widget);
 962         }
 963     }
 964 }
 965
 966 static void
 967 gtk_tree_item_map (GtkWidget *widget)
 968 {
 969   GtkBin *bin;
 970   GtkTreeItem* item;
 971
 972   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 973
 974   bin = GTK_BIN (widget);
 975   item = GTK_TREE_ITEM(widget);
 976
 977   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 978
 979   if(item->pixmaps_box &&
 980      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
 981      !GTK_WIDGET_MAPPED (item->pixmaps_box))
 982     gtk_widget_map (item->pixmaps_box);
 983
 984   if (bin->child &&
 985       GTK_WIDGET_VISIBLE (bin->child) &&
 986       !GTK_WIDGET_MAPPED (bin->child))
 987     gtk_widget_map (bin->child);
 988
 989   gdk_window_show (widget->window);
 990 }
 991
 992 static void
 993 gtk_tree_item_unmap (GtkWidget *widget)
 994 {
 995   GtkBin *bin;
 996   GtkTreeItem* item;
 997
 998   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 999
1000   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
1001   bin = GTK_BIN (widget);
1002   item = GTK_TREE_ITEM(widget);
1003
1004   gdk_window_hide (widget->window);
1005
1006   if(item->pixmaps_box &&
1007      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
1008      GTK_WIDGET_MAPPED (item->pixmaps_box))
1009     gtk_widget_unmap (bin->child);
1010
1011   if (bin->child &&
1012       GTK_WIDGET_VISIBLE (bin->child) &&
1013       GTK_WIDGET_MAPPED (bin->child))
1014     gtk_widget_unmap (bin->child);
1015 }
1016
1017 static void
1018 gtk_tree_item_forall (GtkContainer *container,
1019                       gboolean      include_internals,
1020                       GtkCallback   callback,
1021                       gpointer      callback_data)
1022 {
1023   GtkBin *bin;
1024   GtkTreeItem *tree_item;
1025
1026   g_return_if_fail (GTK_IS_TREE_ITEM (container));
1027   g_return_if_fail (callback != NULL);
1028
1029   bin = GTK_BIN (container);
1030   tree_item = GTK_TREE_ITEM (container);
1031
1032   if (bin->child)
1033     (* callback) (bin->child, callback_data);
1034   if (include_internals && tree_item->subtree)
1035     (* callback) (tree_item->subtree, callback_data);
1036 }