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 #undef GTK_DISABLE_DEPRECATED
  28
  29 #include "gtklabel.h"
  30 #include "gtkeventbox.h"
  31 #include "gtkpixmap.h"
  32 #include "gtkmain.h"
  33 #include "gtkmarshalers.h"
  34 #include "gtksignal.h"
  35 #define GTK_ENABLE_BROKEN
  36 #include "gtktree.h"
  37 #include "gtktreeitem.h"
  38
  39 #include "tree_plus.xpm"
  40 #include "tree_minus.xpm"
  41
  42 #define DEFAULT_DELTA 9
  43
  44 enum {
  45   COLLAPSE_TREE,
  46   EXPAND_TREE,
  47   LAST_SIGNAL
  48 };
  49
  50 typedef struct _GtkTreePixmaps GtkTreePixmaps;
  51
  52 struct _GtkTreePixmaps {
  53   gint refcount;
  54   GdkColormap *colormap;
  55
  56   GdkPixmap *pixmap_plus;
  57   GdkPixmap *pixmap_minus;
  58   GdkBitmap *mask_plus;
  59   GdkBitmap *mask_minus;
  60 };
  61
  62 static GList *pixmaps = NULL;
  63
  64 static void gtk_tree_item_class_init (GtkTreeItemClass *klass);
  65 static void gtk_tree_item_init       (GtkTreeItem      *tree_item);
  66 static void gtk_tree_item_realize       (GtkWidget        *widget);
  67 static void gtk_tree_item_size_request  (GtkWidget        *widget,
  68                                          GtkRequisition   *requisition);
  69 static void gtk_tree_item_size_allocate (GtkWidget        *widget,
  70                                          GtkAllocation    *allocation);
  71 static void gtk_tree_item_paint         (GtkWidget        *widget,
  72                                          GdkRectangle     *area);
  73 static gint gtk_tree_item_button_press  (GtkWidget        *widget,
  74                                          GdkEventButton   *event);
  75 static gint gtk_tree_item_expose        (GtkWidget        *widget,
  76                                          GdkEventExpose   *event);
  77 static void gtk_tree_item_forall        (GtkContainer    *container,
  78                                          gboolean         include_internals,
  79                                          GtkCallback      callback,
  80                                          gpointer         callback_data);
  81
  82 static void gtk_real_tree_item_select   (GtkItem          *item);
  83 static void gtk_real_tree_item_deselect (GtkItem          *item);
  84 static void gtk_real_tree_item_toggle   (GtkItem          *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_real_tree_item_expand   (GtkTreeItem      *item);
  88 static void gtk_real_tree_item_collapse (GtkTreeItem      *item);
  89 static void gtk_tree_item_destroy        (GtkObject *object);
  90 static gint gtk_tree_item_subtree_button_click (GtkWidget *widget);
  91 static void gtk_tree_item_subtree_button_changed_state (GtkWidget *widget);
  92
  93 static void gtk_tree_item_map(GtkWidget*);
  94 static void gtk_tree_item_unmap(GtkWidget*);
  95
  96 static void gtk_tree_item_add_pixmaps    (GtkTreeItem       *tree_item);
  97 static void gtk_tree_item_remove_pixmaps (GtkTreeItem       *tree_item);
  98
  99 static GtkItemClass *parent_class = NULL;
 100 static guint tree_item_signals[LAST_SIGNAL] = { 0 };
 101
 102 GtkType
 103 gtk_tree_item_get_type (void)
 104 {
 105   static GtkType tree_item_type = 0;
 106
 107   if (!tree_item_type)
 108     {
 109       static const GtkTypeInfo tree_item_info =
 110       {
 111         "GtkTreeItem",
 112         sizeof (GtkTreeItem),
 113         sizeof (GtkTreeItemClass),
 114         (GtkClassInitFunc) gtk_tree_item_class_init,
 115         (GtkObjectInitFunc) gtk_tree_item_init,
 116         /* reserved_1 */ NULL,
 117         /* reserved_2 */ NULL,
 118         (GtkClassInitFunc) NULL,
 119       };
 120
 121       tree_item_type = gtk_type_unique (gtk_item_get_type (), &tree_item_info);
 122     }
 123
 124   return tree_item_type;
 125 }
 126
 127 static void
 128 gtk_tree_item_class_init (GtkTreeItemClass *class)
 129 {
 130   GtkObjectClass *object_class;
 131   GtkWidgetClass *widget_class;
 132   GtkContainerClass *container_class;
 133   GtkItemClass *item_class;
 134
 135   parent_class = gtk_type_class (GTK_TYPE_ITEM);
 136
 137   object_class = (GtkObjectClass*) class;
 138   widget_class = (GtkWidgetClass*) class;
 139   item_class = (GtkItemClass*) class;
 140   container_class = (GtkContainerClass*) class;
 141
 142   object_class->destroy = gtk_tree_item_destroy;
 143
 144   widget_class->realize = gtk_tree_item_realize;
 145   widget_class->size_request = gtk_tree_item_size_request;
 146   widget_class->size_allocate = gtk_tree_item_size_allocate;
 147   widget_class->button_press_event = gtk_tree_item_button_press;
 148   widget_class->expose_event = gtk_tree_item_expose;
 149   widget_class->map = gtk_tree_item_map;
 150   widget_class->unmap = gtk_tree_item_unmap;
 151
 152   container_class->forall = gtk_tree_item_forall;
 153
 154   item_class->select = gtk_real_tree_item_select;
 155   item_class->deselect = gtk_real_tree_item_deselect;
 156   item_class->toggle = gtk_real_tree_item_toggle;
 157
 158   class->expand = gtk_real_tree_item_expand;
 159   class->collapse = gtk_real_tree_item_collapse;
 160
 161   tree_item_signals[EXPAND_TREE] =
 162     gtk_signal_new ("expand",
 163                     GTK_RUN_FIRST,
 164                     GTK_CLASS_TYPE (object_class),
 165                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, expand),
 166                     _gtk_marshal_VOID__VOID,
 167                     GTK_TYPE_NONE, 0);
 168   tree_item_signals[COLLAPSE_TREE] =
 169     gtk_signal_new ("collapse",
 170                     GTK_RUN_FIRST,
 171                     GTK_CLASS_TYPE (object_class),
 172                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, collapse),
 173                     _gtk_marshal_VOID__VOID,
 174                     GTK_TYPE_NONE, 0);
 175 }
 176
 177 /* callback for event box mouse event */
 178 static gint
 179 gtk_tree_item_subtree_button_click (GtkWidget *widget)
 180 {
 181   GtkTreeItem* item;
 182
 183   g_return_val_if_fail (GTK_IS_EVENT_BOX (widget), FALSE);
 184
 185   item = (GtkTreeItem*) gtk_object_get_user_data (GTK_OBJECT (widget));
 186   if (!GTK_WIDGET_IS_SENSITIVE (item))
 187     return FALSE;
 188
 189   if (item->expanded)
 190     gtk_tree_item_collapse (item);
 191   else
 192     gtk_tree_item_expand (item);
 193
 194   return TRUE;
 195 }
 196
 197 /* callback for event box state changed */
 198 static void
 199 gtk_tree_item_subtree_button_changed_state (GtkWidget *widget)
 200 {
 201   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 202
 203   if (GTK_WIDGET_VISIBLE (widget))
 204     {
 205
 206       if (widget->state == GTK_STATE_NORMAL)
 207         gdk_window_set_background (widget->window, &widget->style->base[widget->state]);
 208       else
 209         gdk_window_set_background (widget->window, &widget->style->bg[widget->state]);
 210
 211       if (GTK_WIDGET_DRAWABLE (widget))
 212         gdk_window_clear_area (widget->window, 0, 0,
 213                                widget->allocation.width, widget->allocation.height);
 214     }
 215 }
 216
 217 static void
 218 gtk_tree_item_init (GtkTreeItem *tree_item)
 219 {
 220   GtkWidget *eventbox, *pixmapwid;
 221
 222   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 223
 224   tree_item->expanded = FALSE;
 225   tree_item->subtree = NULL;
 226   GTK_WIDGET_SET_FLAGS (tree_item, GTK_CAN_FOCUS);
 227
 228   /* create an event box containing one pixmaps */
 229   eventbox = gtk_event_box_new();
 230   gtk_widget_set_events (eventbox, GDK_BUTTON_PRESS_MASK);
 231   gtk_signal_connect(GTK_OBJECT(eventbox), "state_changed",
 232                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 233                      (gpointer)NULL);
 234   gtk_signal_connect(GTK_OBJECT(eventbox), "realize",
 235                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 236                      (gpointer)NULL);
 237   gtk_signal_connect(GTK_OBJECT(eventbox), "button_press_event",
 238                      (GtkSignalFunc)gtk_tree_item_subtree_button_click,
 239                      (gpointer)NULL);
 240   gtk_object_set_user_data(GTK_OBJECT(eventbox), tree_item);
 241   tree_item->pixmaps_box = eventbox;
 242
 243   /* create pixmap for button '+' */
 244   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 245   if (!tree_item->expanded)
 246     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 247   gtk_widget_show (pixmapwid);
 248   tree_item->plus_pix_widget = pixmapwid;
 249   gtk_widget_ref (tree_item->plus_pix_widget);
 250   gtk_object_sink (GTK_OBJECT (tree_item->plus_pix_widget));
 251
 252   /* create pixmap for button '-' */
 253   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 254   if (tree_item->expanded)
 255     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 256   gtk_widget_show (pixmapwid);
 257   tree_item->minus_pix_widget = pixmapwid;
 258   gtk_widget_ref (tree_item->minus_pix_widget);
 259   gtk_object_sink (GTK_OBJECT (tree_item->minus_pix_widget));
 260
 261   gtk_widget_set_parent (eventbox, GTK_WIDGET (tree_item));
 262 }
 263
 264
 265 GtkWidget*
 266 gtk_tree_item_new (void)
 267 {
 268   GtkWidget *tree_item;
 269
 270   tree_item = GTK_WIDGET (gtk_type_new (gtk_tree_item_get_type ()));
 271
 272   return tree_item;
 273 }
 274
 275 GtkWidget*
 276 gtk_tree_item_new_with_label (const gchar *label)
 277 {
 278   GtkWidget *tree_item;
 279   GtkWidget *label_widget;
 280
 281   tree_item = gtk_tree_item_new ();
 282   label_widget = gtk_label_new (label);
 283   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 284
 285   gtk_container_add (GTK_CONTAINER (tree_item), label_widget);
 286   gtk_widget_show (label_widget);
 287
 288
 289   return tree_item;
 290 }
 291
 292 void
 293 gtk_tree_item_set_subtree (GtkTreeItem *tree_item,
 294                            GtkWidget   *subtree)
 295 {
 296   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 297   g_return_if_fail (GTK_IS_TREE (subtree));
 298
 299   if (tree_item->subtree)
 300     {
 301       g_warning("there is already a subtree for this tree item\n");
 302       return;
 303     }
 304
 305   tree_item->subtree = subtree;
 306   GTK_TREE (subtree)->tree_owner = GTK_WIDGET (tree_item);
 307
 308   /* show subtree button */
 309   if (tree_item->pixmaps_box)
 310     gtk_widget_show (tree_item->pixmaps_box);
 311
 312   if (tree_item->expanded)
 313     gtk_widget_show (subtree);
 314   else
 315     gtk_widget_hide (subtree);
 316
 317   gtk_widget_set_parent (subtree, GTK_WIDGET (tree_item)->parent);
 318 }
 319
 320 void
 321 gtk_tree_item_select (GtkTreeItem *tree_item)
 322 {
 323   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 324
 325   gtk_item_select (GTK_ITEM (tree_item));
 326 }
 327
 328 void
 329 gtk_tree_item_deselect (GtkTreeItem *tree_item)
 330 {
 331   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 332
 333   gtk_item_deselect (GTK_ITEM (tree_item));
 334 }
 335
 336 void
 337 gtk_tree_item_expand (GtkTreeItem *tree_item)
 338 {
 339   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 340
 341   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[EXPAND_TREE], NULL);
 342 }
 343
 344 void
 345 gtk_tree_item_collapse (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[COLLAPSE_TREE], NULL);
 350 }
 351
 352 static void
 353 gtk_tree_item_add_pixmaps (GtkTreeItem *tree_item)
 354 {
 355   GList *tmp_list;
 356   GdkColormap *colormap;
 357   GtkTreePixmaps *pixmap_node = NULL;
 358
 359   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 360
 361   if (tree_item->pixmaps)
 362     return;
 363
 364   colormap = gtk_widget_get_colormap (GTK_WIDGET (tree_item));
 365
 366   tmp_list = pixmaps;
 367   while (tmp_list)
 368     {
 369       pixmap_node = (GtkTreePixmaps *)tmp_list->data;
 370
 371       if (pixmap_node->colormap == colormap)
 372         break;
 373
 374       tmp_list = tmp_list->next;
 375     }
 376
 377   if (tmp_list)
 378     {
 379       pixmap_node->refcount++;
 380       tree_item->pixmaps = tmp_list;
 381     }
 382   else
 383     {
 384       pixmap_node = g_new (GtkTreePixmaps, 1);
 385
 386       pixmap_node->colormap = colormap;
 387       g_object_ref (colormap);
 388
 389       pixmap_node->refcount = 1;
 390
 391       /* create pixmaps for plus icon */
 392       pixmap_node->pixmap_plus =
 393         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 394                                       &pixmap_node->mask_plus,
 395                                       NULL,
 396                                       tree_plus);
 397
 398       /* create pixmaps for minus icon */
 399       pixmap_node->pixmap_minus =
 400         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 401                                       &pixmap_node->mask_minus,
 402                                       NULL,
 403                                       tree_minus);
 404
 405       tree_item->pixmaps = pixmaps = g_list_prepend (pixmaps, pixmap_node);
 406     }
 407
 408   gtk_pixmap_set (GTK_PIXMAP (tree_item->plus_pix_widget),
 409                   pixmap_node->pixmap_plus, pixmap_node->mask_plus);
 410   gtk_pixmap_set (GTK_PIXMAP (tree_item->minus_pix_widget),
 411                   pixmap_node->pixmap_minus, pixmap_node->mask_minus);
 412 }
 413
 414 static void
 415 gtk_tree_item_remove_pixmaps (GtkTreeItem *tree_item)
 416 {
 417   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 418
 419   if (tree_item->pixmaps)
 420     {
 421       GtkTreePixmaps *pixmap_node = (GtkTreePixmaps *)tree_item->pixmaps->data;
 422
 423       g_assert (pixmap_node->refcount > 0);
 424
 425       if (--pixmap_node->refcount == 0)
 426         {
 427           g_object_unref (pixmap_node->colormap);
 428           g_object_unref (pixmap_node->pixmap_plus);
 429           g_object_unref (pixmap_node->mask_plus);
 430           g_object_unref (pixmap_node->pixmap_minus);
 431           g_object_unref (pixmap_node->mask_minus);
 432
 433           pixmaps = g_list_remove_link (pixmaps, tree_item->pixmaps);
 434           g_list_free_1 (tree_item->pixmaps);
 435           g_free (pixmap_node);
 436         }
 437
 438       tree_item->pixmaps = NULL;
 439     }
 440 }
 441
 442 static void
 443 gtk_tree_item_realize (GtkWidget *widget)
 444 {
 445   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 446
 447   if (GTK_WIDGET_CLASS (parent_class)->realize)
 448     (* GTK_WIDGET_CLASS (parent_class)->realize) (widget);
 449
 450   gdk_window_set_background (widget->window,
 451                              &widget->style->base[GTK_STATE_NORMAL]);
 452
 453   gtk_tree_item_add_pixmaps (GTK_TREE_ITEM (widget));
 454 }
 455
 456 static void
 457 gtk_tree_item_size_request (GtkWidget      *widget,
 458                             GtkRequisition *requisition)
 459 {
 460   GtkBin *bin;
 461   GtkTreeItem* item;
 462   GtkRequisition child_requisition;
 463
 464   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 465   g_return_if_fail (requisition != NULL);
 466
 467   bin = GTK_BIN (widget);
 468   item = GTK_TREE_ITEM(widget);
 469
 470   requisition->width = (GTK_CONTAINER (widget)->border_width +
 471                         widget->style->xthickness) * 2;
 472   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 473
 474   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 475     {
 476       GtkRequisition pix_requisition;
 477
 478       gtk_widget_size_request (bin->child, &child_requisition);
 479
 480       requisition->width += child_requisition.width;
 481
 482       gtk_widget_size_request (item->pixmaps_box,
 483                                &pix_requisition);
 484       requisition->width += pix_requisition.width + DEFAULT_DELTA +
 485         GTK_TREE (widget->parent)->current_indent;
 486
 487       requisition->height += MAX (child_requisition.height,
 488                                   pix_requisition.height);
 489     }
 490 }
 491
 492 static void
 493 gtk_tree_item_size_allocate (GtkWidget     *widget,
 494                              GtkAllocation *allocation)
 495 {
 496   GtkBin *bin;
 497   GtkTreeItem* item;
 498   GtkAllocation child_allocation;
 499   gint border_width;
 500   int temp;
 501
 502   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 503   g_return_if_fail (allocation != NULL);
 504
 505   widget->allocation = *allocation;
 506   if (GTK_WIDGET_REALIZED (widget))
 507     gdk_window_move_resize (widget->window,
 508                             allocation->x, allocation->y,
 509                             allocation->width, allocation->height);
 510
 511   bin = GTK_BIN (widget);
 512   item = GTK_TREE_ITEM(widget);
 513
 514   if (bin->child)
 515     {
 516       border_width = (GTK_CONTAINER (widget)->border_width +
 517                       widget->style->xthickness);
 518
 519       child_allocation.x = border_width + GTK_TREE(widget->parent)->current_indent;
 520       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 521
 522       child_allocation.width = item->pixmaps_box->requisition.width;
 523       child_allocation.height = item->pixmaps_box->requisition.height;
 524
 525       temp = allocation->height - child_allocation.height;
 526       child_allocation.y += ( temp / 2 ) + ( temp % 2 );
 527
 528       gtk_widget_size_allocate (item->pixmaps_box, &child_allocation);
 529
 530       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 531       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 532       child_allocation.x += item->pixmaps_box->requisition.width+DEFAULT_DELTA;
 533
 534       child_allocation.width =
 535         MAX (1, (gint)allocation->width - ((gint)child_allocation.x + border_width));
 536
 537       gtk_widget_size_allocate (bin->child, &child_allocation);
 538     }
 539 }
 540
 541 static void
 542 gtk_tree_item_draw_lines (GtkWidget *widget)
 543 {
 544   GtkTreeItem* item;
 545   GtkTree* tree;
 546   guint lx1, ly1, lx2, ly2;
 547   GdkGC* gc;
 548
 549   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 550
 551   item = GTK_TREE_ITEM(widget);
 552   tree = GTK_TREE(widget->parent);
 553
 554   if (!tree->view_line)
 555     return;
 556
 557   gc = widget->style->text_gc[GTK_STATE_NORMAL];
 558
 559   /* draw vertical line */
 560   lx1 = item->pixmaps_box->allocation.width;
 561   lx1 = lx2 = ((lx1 / 2) + (lx1 % 2) +
 562                GTK_CONTAINER (widget)->border_width + 1 + tree->current_indent);
 563   ly1 = 0;
 564   ly2 = widget->allocation.height;
 565
 566   if (g_list_last (tree->children)->data == widget)
 567     ly2 = (ly2 / 2) + (ly2 % 2);
 568
 569   if (tree != tree->root_tree)
 570     gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 571
 572   /* draw vertical line for subtree connecting */
 573   if(g_list_last(tree->children)->data != (gpointer)widget)
 574     ly2 = (ly2 / 2) + (ly2 % 2);
 575
 576   lx2 += DEFAULT_DELTA;
 577
 578   if (item->subtree && item->expanded)
 579     gdk_draw_line (widget->window, gc,
 580                    lx2, ly2, lx2, widget->allocation.height);
 581
 582   /* draw horizontal line */
 583   ly1 = ly2;
 584   lx2 += 2;
 585
 586   gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 587
 588   lx2 -= DEFAULT_DELTA+2;
 589   ly1 = 0;
 590   ly2 = widget->allocation.height;
 591
 592   if (tree != tree->root_tree)
 593     {
 594       item = GTK_TREE_ITEM (tree->tree_owner);
 595       tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 596       while (tree != tree->root_tree)
 597         {
 598           lx1 = lx2 -= tree->indent_value;
 599
 600           if (g_list_last (tree->children)->data != item)
 601             gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 602           item = GTK_TREE_ITEM (tree->tree_owner);
 603           tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 604         }
 605     }
 606 }
 607
 608 static void
 609 gtk_tree_item_paint (GtkWidget    *widget,
 610                      GdkRectangle *area)
 611 {
 612   GtkBin *bin;
 613   GdkRectangle child_area, item_area;
 614   GtkTreeItem* tree_item;
 615
 616   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 617   g_return_if_fail (area != NULL);
 618
 619   /* FIXME: We should honor tree->view_mode, here - I think
 620    * the desired effect is that when the mode is VIEW_ITEM,
 621    * only the subitem is drawn as selected, not the entire
 622    * line. (Like the way that the tree in Windows Explorer
 623    * works).
 624    */
 625   if (GTK_WIDGET_DRAWABLE (widget))
 626     {
 627       bin = GTK_BIN (widget);
 628       tree_item = GTK_TREE_ITEM(widget);
 629
 630       if (widget->state == GTK_STATE_NORMAL)
 631         {
 632           gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 633           gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
 634         }
 635       else
 636         {
 637           if (!GTK_WIDGET_IS_SENSITIVE (widget))
 638             gtk_paint_flat_box(widget->style, widget->window,
 639                                widget->state, GTK_SHADOW_NONE,
 640                                area, widget, "treeitem",
 641                                0, 0, -1, -1);
 642           else
 643             gtk_paint_flat_box(widget->style, widget->window,
 644                                widget->state, GTK_SHADOW_ETCHED_OUT,
 645                                area, widget, "treeitem",
 646                                0, 0, -1, -1);
 647         }
 648
 649       /* draw left size of tree item */
 650       item_area.x = 0;
 651       item_area.y = 0;
 652       item_area.width = (tree_item->pixmaps_box->allocation.width + DEFAULT_DELTA +
 653                          GTK_TREE (widget->parent)->current_indent + 2);
 654       item_area.height = widget->allocation.height;
 655
 656
 657       if (gdk_rectangle_intersect(&item_area, area, &child_area))
 658         {
 659
 660           gtk_tree_item_draw_lines(widget);
 661
 662           if (tree_item->pixmaps_box &&
 663               GTK_WIDGET_VISIBLE(tree_item->pixmaps_box) &&
 664               gtk_widget_intersect (tree_item->pixmaps_box, area, &child_area))
 665             gtk_widget_draw (tree_item->pixmaps_box, &child_area);
 666         }
 667
 668       if (GTK_WIDGET_HAS_FOCUS (widget))
 669         gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget),
 670                          NULL, widget, "treeitem",
 671                          0, 0,
 672                          widget->allocation.width,
 673                          widget->allocation.height);
 674
 675     }
 676 }
 677
 678 static gint
 679 gtk_tree_item_button_press (GtkWidget      *widget,
 680                             GdkEventButton *event)
 681 {
 682
 683   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 684   g_return_val_if_fail (event != NULL, FALSE);
 685
 686   if (event->type == GDK_BUTTON_PRESS
 687         && GTK_WIDGET_IS_SENSITIVE(widget)
 688         && !GTK_WIDGET_HAS_FOCUS (widget))
 689       gtk_widget_grab_focus (widget);
 690
 691   return (event->type == GDK_BUTTON_PRESS && GTK_WIDGET_IS_SENSITIVE(widget));
 692 }
 693
 694 static void
 695 gtk_tree_item_expose_child (GtkWidget *child,
 696                             gpointer   client_data)
 697 {
 698   struct {
 699     GtkWidget *container;
 700     GdkEventExpose *event;
 701   } *data = client_data;
 702
 703   if (GTK_WIDGET_DRAWABLE (child) &&
 704       GTK_WIDGET_NO_WINDOW (child) &&
 705       (child->window == data->event->window))
 706     {
 707       GdkEvent *child_event = gdk_event_new (GDK_EXPOSE);
 708       child_event->expose = *data->event;
 709       g_object_ref (child_event->expose.window);
 710
 711       child_event->expose.region = gtk_widget_region_intersect (child,
 712                                                                 data->event->region);
 713       if (!gdk_region_empty (child_event->expose.region))
 714         {
 715           gdk_region_get_clipbox (child_event->expose.region, &child_event->expose.area);
 716           gtk_widget_send_expose (child, child_event);
 717         }
 718       gdk_event_free (child_event);
 719     }
 720 }
 721
 722 static gint
 723 gtk_tree_item_expose (GtkWidget      *widget,
 724                       GdkEventExpose *event)
 725 {
 726   struct {
 727     GtkWidget *container;
 728     GdkEventExpose *event;
 729   } data;
 730
 731   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 732   g_return_val_if_fail (event != NULL, FALSE);
 733
 734   if (GTK_WIDGET_DRAWABLE (widget))
 735     {
 736       gtk_tree_item_paint (widget, &event->area);
 737
 738       data.container = widget;
 739       data.event = event;
 740
 741       gtk_container_forall (GTK_CONTAINER (widget),
 742                             gtk_tree_item_expose_child,
 743                             &data);
 744    }
 745
 746   return FALSE;
 747 }
 748
 749 static void
 750 gtk_real_tree_item_select (GtkItem *item)
 751 {
 752   GtkTreeItem *tree_item;
 753   GtkWidget *widget;
 754
 755   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 756
 757   tree_item = GTK_TREE_ITEM (item);
 758   widget = GTK_WIDGET (item);
 759
 760   gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 761
 762   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 763     gtk_widget_set_state (GTK_TREE_ITEM (item)->pixmaps_box, GTK_STATE_SELECTED);
 764 }
 765
 766 static void
 767 gtk_real_tree_item_deselect (GtkItem *item)
 768 {
 769   GtkTreeItem *tree_item;
 770   GtkWidget *widget;
 771
 772   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 773
 774   tree_item = GTK_TREE_ITEM (item);
 775   widget = GTK_WIDGET (item);
 776
 777   gtk_widget_set_state (widget, GTK_STATE_NORMAL);
 778
 779   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 780     gtk_widget_set_state (tree_item->pixmaps_box, GTK_STATE_NORMAL);
 781 }
 782
 783 static void
 784 gtk_real_tree_item_toggle (GtkItem *item)
 785 {
 786   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 787
 788   if(!GTK_WIDGET_IS_SENSITIVE(item))
 789     return;
 790
 791   if (GTK_WIDGET (item)->parent && GTK_IS_TREE (GTK_WIDGET (item)->parent))
 792     gtk_tree_select_child (GTK_TREE (GTK_WIDGET (item)->parent),
 793                            GTK_WIDGET (item));
 794   else
 795     {
 796       /* Should we really bother with this bit? A listitem not in a list?
 797        * -Johannes Keukelaar
 798        * yes, always be on the safe side!
 799        * -timj
 800        */
 801       if (GTK_WIDGET (item)->state == GTK_STATE_SELECTED)
 802         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_NORMAL);
 803       else
 804         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 805     }
 806 }
 807
 808 static void
 809 gtk_real_tree_item_expand (GtkTreeItem *tree_item)
 810 {
 811   GtkTree* tree;
 812
 813   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 814
 815   if (tree_item->subtree && !tree_item->expanded)
 816     {
 817       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 818
 819       /* hide subtree widget */
 820       gtk_widget_show (tree_item->subtree);
 821
 822       /* hide button '+' and show button '-' */
 823       if (tree_item->pixmaps_box)
 824         {
 825           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 826                                 tree_item->plus_pix_widget);
 827           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 828                              tree_item->minus_pix_widget);
 829         }
 830       if (tree->root_tree)
 831         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 832       tree_item->expanded = TRUE;
 833     }
 834 }
 835
 836 static void
 837 gtk_real_tree_item_collapse (GtkTreeItem *tree_item)
 838 {
 839   GtkTree* tree;
 840
 841   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 842
 843   if (tree_item->subtree && tree_item->expanded)
 844     {
 845       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 846
 847       /* hide subtree widget */
 848       gtk_widget_hide (tree_item->subtree);
 849
 850       /* hide button '-' and show button '+' */
 851       if (tree_item->pixmaps_box)
 852         {
 853           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 854                                 tree_item->minus_pix_widget);
 855           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 856                              tree_item->plus_pix_widget);
 857         }
 858       if (tree->root_tree)
 859         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 860       tree_item->expanded = FALSE;
 861     }
 862 }
 863
 864 static void
 865 gtk_tree_item_destroy (GtkObject *object)
 866 {
 867   GtkTreeItem* item;
 868   GtkWidget* child;
 869
 870   g_return_if_fail (GTK_IS_TREE_ITEM (object));
 871
 872 #ifdef TREE_DEBUG
 873   g_message("+ gtk_tree_item_destroy [object %#x]\n", (int)object);
 874 #endif /* TREE_DEBUG */
 875
 876   item = GTK_TREE_ITEM(object);
 877
 878   /* free sub tree if it exist */
 879   child = item->subtree;
 880   if (child)
 881     {
 882       gtk_widget_ref (child);
 883       gtk_widget_unparent (child);
 884       gtk_widget_destroy (child);
 885       gtk_widget_unref (child);
 886       item->subtree = NULL;
 887     }
 888
 889   /* free pixmaps box */
 890   child = item->pixmaps_box;
 891   if (child)
 892     {
 893       gtk_widget_ref (child);
 894       gtk_widget_unparent (child);
 895       gtk_widget_destroy (child);
 896       gtk_widget_unref (child);
 897       item->pixmaps_box = NULL;
 898     }
 899
 900
 901   /* destroy plus pixmap */
 902   if (item->plus_pix_widget)
 903     {
 904       gtk_widget_destroy (item->plus_pix_widget);
 905       gtk_widget_unref (item->plus_pix_widget);
 906       item->plus_pix_widget = NULL;
 907     }
 908
 909   /* destroy minus pixmap */
 910   if (item->minus_pix_widget)
 911     {
 912       gtk_widget_destroy (item->minus_pix_widget);
 913       gtk_widget_unref (item->minus_pix_widget);
 914       item->minus_pix_widget = NULL;
 915     }
 916
 917   /* By removing the pixmaps here, and not in unrealize, we depend on
 918    * the fact that a widget can never change colormap or visual.
 919    */
 920   gtk_tree_item_remove_pixmaps (item);
 921
 922   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 923
 924 #ifdef TREE_DEBUG
 925   g_message("- gtk_tree_item_destroy\n");
 926 #endif /* TREE_DEBUG */
 927 }
 928
 929 void
 930 gtk_tree_item_remove_subtree (GtkTreeItem* item)
 931 {
 932   g_return_if_fail (GTK_IS_TREE_ITEM(item));
 933   g_return_if_fail (item->subtree != NULL);
 934
 935   if (GTK_TREE (item->subtree)->children)
 936     {
 937       /* The following call will remove the children and call
 938        * gtk_tree_item_remove_subtree() again. So we are done.
 939        */
 940       gtk_tree_remove_items (GTK_TREE (item->subtree),
 941                              GTK_TREE (item->subtree)->children);
 942       return;
 943     }
 944
 945   if (GTK_WIDGET_MAPPED (item->subtree))
 946     gtk_widget_unmap (item->subtree);
 947
 948   gtk_widget_unparent (item->subtree);
 949
 950   if (item->pixmaps_box)
 951     gtk_widget_hide (item->pixmaps_box);
 952
 953   item->subtree = NULL;
 954
 955   if (item->expanded)
 956     {
 957       item->expanded = FALSE;
 958       if (item->pixmaps_box)
 959         {
 960           gtk_container_remove (GTK_CONTAINER (item->pixmaps_box),
 961                                 item->minus_pix_widget);
 962           gtk_container_add (GTK_CONTAINER (item->pixmaps_box),
 963                              item->plus_pix_widget);
 964         }
 965     }
 966 }
 967
 968 static void
 969 gtk_tree_item_map (GtkWidget *widget)
 970 {
 971   GtkBin *bin;
 972   GtkTreeItem* item;
 973
 974   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 975
 976   bin = GTK_BIN (widget);
 977   item = GTK_TREE_ITEM(widget);
 978
 979   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 980
 981   if(item->pixmaps_box &&
 982      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
 983      !GTK_WIDGET_MAPPED (item->pixmaps_box))
 984     gtk_widget_map (item->pixmaps_box);
 985
 986   if (bin->child &&
 987       GTK_WIDGET_VISIBLE (bin->child) &&
 988       !GTK_WIDGET_MAPPED (bin->child))
 989     gtk_widget_map (bin->child);
 990
 991   gdk_window_show (widget->window);
 992 }
 993
 994 static void
 995 gtk_tree_item_unmap (GtkWidget *widget)
 996 {
 997   GtkBin *bin;
 998   GtkTreeItem* item;
 999
1000   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
1001
1002   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
1003   bin = GTK_BIN (widget);
1004   item = GTK_TREE_ITEM(widget);
1005
1006   gdk_window_hide (widget->window);
1007
1008   if(item->pixmaps_box &&
1009      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
1010      GTK_WIDGET_MAPPED (item->pixmaps_box))
1011     gtk_widget_unmap (bin->child);
1012
1013   if (bin->child &&
1014       GTK_WIDGET_VISIBLE (bin->child) &&
1015       GTK_WIDGET_MAPPED (bin->child))
1016     gtk_widget_unmap (bin->child);
1017 }
1018
1019 static void
1020 gtk_tree_item_forall (GtkContainer *container,
1021                       gboolean      include_internals,
1022                       GtkCallback   callback,
1023                       gpointer      callback_data)
1024 {
1025   GtkBin *bin;
1026   GtkTreeItem *tree_item;
1027
1028   g_return_if_fail (GTK_IS_TREE_ITEM (container));
1029   g_return_if_fail (callback != NULL);
1030
1031   bin = GTK_BIN (container);
1032   tree_item = GTK_TREE_ITEM (container);
1033
1034   if (bin->child)
1035     (* callback) (bin->child, callback_data);
1036   if (include_internals && tree_item->subtree)
1037     (* callback) (tree_item->subtree, callback_data);
1038 }