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 Library 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  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library 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 #include "gtklabel.h"
  20 #include "gtktree.h"
  21 #include "gtktreeitem.h"
  22 #include "gtkeventbox.h"
  23 #include "gtkpixmap.h"
  24 #include "gtkmain.h"
  25 #include "gtksignal.h"
  26
  27 #include "tree_plus.xpm"
  28 #include "tree_minus.xpm"
  29
  30 #define DEFAULT_DELTA 9
  31
  32 enum {
  33   COLLAPSE_TREE,
  34   EXPAND_TREE,
  35   LAST_SIGNAL
  36 };
  37
  38 typedef struct _GtkTreePixmaps GtkTreePixmaps;
  39
  40 struct _GtkTreePixmaps {
  41   gint refcount;
  42   GdkColormap *colormap;
  43
  44   GdkPixmap *pixmap_plus;
  45   GdkPixmap *pixmap_minus;
  46   GdkBitmap *mask_plus;
  47   GdkBitmap *mask_minus;
  48 };
  49
  50 static GList *pixmaps = NULL;
  51
  52 static void gtk_tree_item_class_init (GtkTreeItemClass *klass);
  53 static void gtk_tree_item_init       (GtkTreeItem      *tree_item);
  54 static void gtk_tree_item_realize       (GtkWidget        *widget);
  55 static void gtk_tree_item_size_request  (GtkWidget        *widget,
  56                                          GtkRequisition   *requisition);
  57 static void gtk_tree_item_size_allocate (GtkWidget        *widget,
  58                                          GtkAllocation    *allocation);
  59 static void gtk_tree_item_draw          (GtkWidget        *widget,
  60                                          GdkRectangle     *area);
  61 static void gtk_tree_item_draw_focus    (GtkWidget        *widget);
  62 static gint gtk_tree_item_button_press  (GtkWidget        *widget,
  63                                          GdkEventButton   *event);
  64 static gint gtk_tree_item_expose        (GtkWidget        *widget,
  65                                          GdkEventExpose   *event);
  66 static gint gtk_tree_item_focus_in      (GtkWidget        *widget,
  67                                          GdkEventFocus    *event);
  68 static gint gtk_tree_item_focus_out     (GtkWidget        *widget,
  69                                          GdkEventFocus    *event);
  70 static void gtk_tree_item_forall        (GtkContainer    *container,
  71                                          gboolean         include_internals,
  72                                          GtkCallback      callback,
  73                                          gpointer         callback_data);
  74
  75 static void gtk_real_tree_item_select   (GtkItem          *item);
  76 static void gtk_real_tree_item_deselect (GtkItem          *item);
  77 static void gtk_real_tree_item_toggle   (GtkItem          *item);
  78 static void gtk_real_tree_item_expand   (GtkTreeItem      *item);
  79 static void gtk_real_tree_item_collapse (GtkTreeItem      *item);
  80 static void gtk_real_tree_item_expand   (GtkTreeItem      *item);
  81 static void gtk_real_tree_item_collapse (GtkTreeItem      *item);
  82 static void gtk_tree_item_destroy        (GtkObject *object);
  83 static void gtk_tree_item_subtree_button_click (GtkWidget *widget);
  84 static void gtk_tree_item_subtree_button_changed_state (GtkWidget *widget);
  85
  86 static void gtk_tree_item_map(GtkWidget*);
  87 static void gtk_tree_item_unmap(GtkWidget*);
  88
  89 static void gtk_tree_item_add_pixmaps    (GtkTreeItem       *tree_item);
  90 static void gtk_tree_item_remove_pixmaps (GtkTreeItem       *tree_item);
  91
  92 static GtkItemClass *parent_class = NULL;
  93 static guint tree_item_signals[LAST_SIGNAL] = { 0 };
  94
  95 GtkType
  96 gtk_tree_item_get_type (void)
  97 {
  98   static GtkType tree_item_type = 0;
  99
 100   if (!tree_item_type)
 101     {
 102       static const GtkTypeInfo tree_item_info =
 103       {
 104         "GtkTreeItem",
 105         sizeof (GtkTreeItem),
 106         sizeof (GtkTreeItemClass),
 107         (GtkClassInitFunc) gtk_tree_item_class_init,
 108         (GtkObjectInitFunc) gtk_tree_item_init,
 109         /* reserved_1 */ NULL,
 110         /* reserved_2 */ NULL,
 111         (GtkClassInitFunc) NULL,
 112       };
 113
 114       tree_item_type = gtk_type_unique (gtk_item_get_type (), &tree_item_info);
 115     }
 116
 117   return tree_item_type;
 118 }
 119
 120 static void
 121 gtk_tree_item_class_init (GtkTreeItemClass *class)
 122 {
 123   GtkObjectClass *object_class;
 124   GtkWidgetClass *widget_class;
 125   GtkContainerClass *container_class;
 126   GtkItemClass *item_class;
 127
 128   object_class = (GtkObjectClass*) class;
 129   widget_class = (GtkWidgetClass*) class;
 130   item_class = (GtkItemClass*) class;
 131   container_class = (GtkContainerClass*) class;
 132
 133   parent_class = gtk_type_class (gtk_item_get_type ());
 134
 135   tree_item_signals[EXPAND_TREE] =
 136     gtk_signal_new ("expand",
 137                     GTK_RUN_FIRST,
 138                     object_class->type,
 139                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, expand),
 140                     gtk_marshal_NONE__NONE,
 141                     GTK_TYPE_NONE, 0);
 142   tree_item_signals[COLLAPSE_TREE] =
 143     gtk_signal_new ("collapse",
 144                     GTK_RUN_FIRST,
 145                     object_class->type,
 146                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, collapse),
 147                     gtk_marshal_NONE__NONE,
 148                     GTK_TYPE_NONE, 0);
 149
 150   gtk_object_class_add_signals (object_class, tree_item_signals, LAST_SIGNAL);
 151
 152   object_class->destroy = gtk_tree_item_destroy;
 153
 154   widget_class->realize = gtk_tree_item_realize;
 155   widget_class->size_request = gtk_tree_item_size_request;
 156   widget_class->size_allocate = gtk_tree_item_size_allocate;
 157   widget_class->draw = gtk_tree_item_draw;
 158   widget_class->draw_focus = gtk_tree_item_draw_focus;
 159   widget_class->button_press_event = gtk_tree_item_button_press;
 160   widget_class->expose_event = gtk_tree_item_expose;
 161   widget_class->focus_in_event = gtk_tree_item_focus_in;
 162   widget_class->focus_out_event = gtk_tree_item_focus_out;
 163   widget_class->map = gtk_tree_item_map;
 164   widget_class->unmap = gtk_tree_item_unmap;
 165
 166   container_class->forall = gtk_tree_item_forall;
 167
 168   item_class->select = gtk_real_tree_item_select;
 169   item_class->deselect = gtk_real_tree_item_deselect;
 170   item_class->toggle = gtk_real_tree_item_toggle;
 171
 172   class->expand = gtk_real_tree_item_expand;
 173   class->collapse = gtk_real_tree_item_collapse;
 174 }
 175
 176 /* callback for event box mouse event */
 177 static void
 178 gtk_tree_item_subtree_button_click (GtkWidget *widget)
 179 {
 180   GtkTreeItem* item;
 181
 182   g_return_if_fail (widget != NULL);
 183   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 184
 185   item = (GtkTreeItem*) gtk_object_get_user_data (GTK_OBJECT (widget));
 186   if (!GTK_WIDGET_IS_SENSITIVE (item))
 187     return;
 188
 189   if (item->expanded)
 190     gtk_tree_item_collapse (item);
 191   else
 192     gtk_tree_item_expand (item);
 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 (widget != NULL);
 200   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 201
 202   if (GTK_WIDGET_VISIBLE (widget))
 203     {
 204
 205       if (widget->state == GTK_STATE_NORMAL)
 206         gdk_window_set_background (widget->window, &widget->style->base[widget->state]);
 207       else
 208         gdk_window_set_background (widget->window, &widget->style->bg[widget->state]);
 209
 210       if (GTK_WIDGET_DRAWABLE (widget))
 211         gdk_window_clear_area (widget->window, 0, 0,
 212                                widget->allocation.width, widget->allocation.height);
 213     }
 214 }
 215
 216 static void
 217 gtk_tree_item_init (GtkTreeItem *tree_item)
 218 {
 219   GtkWidget *eventbox, *pixmapwid;
 220
 221   g_return_if_fail (tree_item != NULL);
 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 (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 (tree_item != NULL);
 297   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 298   g_return_if_fail (subtree != NULL);
 299   g_return_if_fail (GTK_IS_TREE (subtree));
 300
 301   if(tree_item->subtree) {
 302     g_warning("there is already a subtree for this tree item\n");
 303     return;
 304   }
 305
 306   tree_item->subtree = subtree;
 307   GTK_TREE(subtree)->tree_owner = GTK_WIDGET(tree_item);
 308
 309   /* show subtree button */
 310   if (tree_item->pixmaps_box)
 311     gtk_widget_show (tree_item->pixmaps_box);
 312
 313   /* set parent widget */
 314   gtk_widget_set_parent(subtree, GTK_WIDGET(tree_item)->parent);
 315
 316   if(GTK_WIDGET_VISIBLE(GTK_WIDGET(tree_item)))
 317     {
 318       if(GTK_WIDGET_REALIZED (GTK_WIDGET(tree_item)) &&
 319          !GTK_WIDGET_REALIZED (GTK_WIDGET(subtree)))
 320         gtk_widget_realize (GTK_WIDGET(subtree));
 321
 322       if(GTK_WIDGET_MAPPED (GTK_WIDGET(tree_item)) &&
 323          !GTK_WIDGET_MAPPED (GTK_WIDGET(subtree)))
 324         gtk_widget_map (GTK_WIDGET(subtree));
 325     }
 326
 327   if (tree_item->expanded)
 328     gtk_widget_show(subtree);
 329   else
 330     gtk_widget_hide(subtree);
 331
 332   if (GTK_WIDGET_VISIBLE (tree_item) && GTK_WIDGET_VISIBLE (tree_item))
 333     gtk_widget_queue_resize (GTK_WIDGET(tree_item));
 334
 335 }
 336
 337 void
 338 gtk_tree_item_select (GtkTreeItem *tree_item)
 339 {
 340   g_return_if_fail (tree_item != NULL);
 341   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 342
 343   gtk_item_select (GTK_ITEM (tree_item));
 344 }
 345
 346 void
 347 gtk_tree_item_deselect (GtkTreeItem *tree_item)
 348 {
 349   g_return_if_fail (tree_item != NULL);
 350   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 351
 352   gtk_item_deselect (GTK_ITEM (tree_item));
 353 }
 354
 355 void
 356 gtk_tree_item_expand (GtkTreeItem *tree_item)
 357 {
 358   g_return_if_fail (tree_item != NULL);
 359   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 360
 361   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[EXPAND_TREE], NULL);
 362 }
 363
 364 void
 365 gtk_tree_item_collapse (GtkTreeItem *tree_item)
 366 {
 367   g_return_if_fail (tree_item != NULL);
 368   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 369
 370   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[COLLAPSE_TREE], NULL);
 371 }
 372
 373 static void
 374 gtk_tree_item_add_pixmaps (GtkTreeItem *tree_item)
 375 {
 376   GList *tmp_list;
 377   GdkColormap *colormap;
 378   GtkTreePixmaps *pixmap_node = NULL;
 379
 380   g_return_if_fail (tree_item != NULL);
 381   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 382
 383   if (tree_item->pixmaps)
 384     return;
 385
 386   colormap = gtk_widget_get_colormap (GTK_WIDGET (tree_item));
 387
 388   tmp_list = pixmaps;
 389   while (tmp_list)
 390     {
 391       pixmap_node = (GtkTreePixmaps *)tmp_list->data;
 392
 393       if (pixmap_node->colormap == colormap)
 394         break;
 395
 396       tmp_list = tmp_list->next;
 397     }
 398
 399   if (tmp_list)
 400     {
 401       pixmap_node->refcount++;
 402       tree_item->pixmaps = tmp_list;
 403     }
 404   else
 405     {
 406       pixmap_node = g_new (GtkTreePixmaps, 1);
 407
 408       pixmap_node->colormap = colormap;
 409       gdk_colormap_ref (colormap);
 410
 411       pixmap_node->refcount = 1;
 412
 413       /* create pixmaps for plus icon */
 414       pixmap_node->pixmap_plus =
 415         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 416                                       &pixmap_node->mask_plus,
 417                                       NULL,
 418                                       tree_plus);
 419
 420       /* create pixmaps for minus icon */
 421       pixmap_node->pixmap_minus =
 422         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 423                                       &pixmap_node->mask_minus,
 424                                       NULL,
 425                                       tree_minus);
 426
 427       tree_item->pixmaps = pixmaps = g_list_prepend (pixmaps, pixmap_node);
 428     }
 429
 430   gtk_pixmap_set (GTK_PIXMAP (tree_item->plus_pix_widget),
 431                   pixmap_node->pixmap_plus, pixmap_node->mask_plus);
 432   gtk_pixmap_set (GTK_PIXMAP (tree_item->minus_pix_widget),
 433                   pixmap_node->pixmap_minus, pixmap_node->mask_minus);
 434 }
 435
 436 static void
 437 gtk_tree_item_remove_pixmaps (GtkTreeItem *tree_item)
 438 {
 439   g_return_if_fail (tree_item != NULL);
 440   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 441
 442   if (tree_item->pixmaps)
 443     {
 444       GtkTreePixmaps *pixmap_node = (GtkTreePixmaps *)tree_item->pixmaps->data;
 445
 446       g_assert (pixmap_node->refcount > 0);
 447
 448       if (--pixmap_node->refcount == 0)
 449         {
 450           gdk_colormap_unref (pixmap_node->colormap);
 451           gdk_pixmap_unref (pixmap_node->pixmap_plus);
 452           gdk_bitmap_unref (pixmap_node->mask_plus);
 453           gdk_pixmap_unref (pixmap_node->pixmap_minus);
 454           gdk_bitmap_unref (pixmap_node->mask_minus);
 455
 456           pixmaps = g_list_remove_link (pixmaps, tree_item->pixmaps);
 457           g_list_free_1 (tree_item->pixmaps);
 458           g_free (pixmap_node);
 459         }
 460
 461       tree_item->pixmaps = NULL;
 462     }
 463 }
 464
 465 static void
 466 gtk_tree_item_realize (GtkWidget *widget)
 467 {
 468   g_return_if_fail (widget != NULL);
 469   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 470
 471   if (GTK_WIDGET_CLASS (parent_class)->realize)
 472     (* GTK_WIDGET_CLASS (parent_class)->realize) (widget);
 473
 474   gdk_window_set_background (widget->window,
 475                              &widget->style->base[GTK_STATE_NORMAL]);
 476
 477   gtk_tree_item_add_pixmaps (GTK_TREE_ITEM (widget));
 478 }
 479
 480 static void
 481 gtk_tree_item_size_request (GtkWidget      *widget,
 482                             GtkRequisition *requisition)
 483 {
 484   GtkBin *bin;
 485   GtkTreeItem* item;
 486
 487   g_return_if_fail (widget != NULL);
 488   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 489   g_return_if_fail (requisition != NULL);
 490
 491   bin = GTK_BIN (widget);
 492   item = GTK_TREE_ITEM(widget);
 493
 494   requisition->width = (GTK_CONTAINER (widget)->border_width +
 495                         widget->style->klass->xthickness) * 2;
 496   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 497
 498   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 499     {
 500       gtk_widget_size_request (bin->child, &bin->child->requisition);
 501
 502       requisition->width += bin->child->requisition.width;
 503
 504       gtk_widget_size_request (item->pixmaps_box,
 505                                &item->pixmaps_box->requisition);
 506       requisition->width += item->pixmaps_box->requisition.width + DEFAULT_DELTA +
 507         GTK_TREE(widget->parent)->current_indent;
 508
 509       requisition->height += MAX (bin->child->requisition.height,
 510                                   item->pixmaps_box->requisition.height);
 511     }
 512 }
 513
 514 static void
 515 gtk_tree_item_size_allocate (GtkWidget     *widget,
 516                              GtkAllocation *allocation)
 517 {
 518   GtkBin *bin;
 519   GtkTreeItem* item;
 520   GtkAllocation child_allocation;
 521   guint border_width;
 522   int temp;
 523
 524   g_return_if_fail (widget != NULL);
 525   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 526   g_return_if_fail (allocation != NULL);
 527
 528   widget->allocation = *allocation;
 529   if (GTK_WIDGET_REALIZED (widget))
 530     gdk_window_move_resize (widget->window,
 531                             allocation->x, allocation->y,
 532                             allocation->width, allocation->height);
 533
 534   bin = GTK_BIN (widget);
 535   item = GTK_TREE_ITEM(widget);
 536
 537   if (bin->child)
 538     {
 539       border_width = (GTK_CONTAINER (widget)->border_width +
 540                       widget->style->klass->xthickness);
 541
 542       child_allocation.x = border_width + GTK_TREE(widget->parent)->current_indent;
 543       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 544
 545       child_allocation.width = item->pixmaps_box->requisition.width;
 546       child_allocation.height = item->pixmaps_box->requisition.height;
 547
 548       temp = allocation->height - child_allocation.height;
 549       child_allocation.y += ( temp / 2 ) + ( temp % 2 );
 550
 551       gtk_widget_size_allocate (item->pixmaps_box, &child_allocation);
 552
 553       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 554       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 555       child_allocation.x += item->pixmaps_box->requisition.width+DEFAULT_DELTA;
 556
 557       child_allocation.width =
 558         MAX (1, (gint)allocation->width - ((gint)child_allocation.x + border_width));
 559
 560       gtk_widget_size_allocate (bin->child, &child_allocation);
 561     }
 562 }
 563
 564 static void
 565 gtk_tree_item_draw_lines (GtkWidget *widget)
 566 {
 567   GtkTreeItem* item;
 568   GtkTree* tree;
 569   guint lx1, ly1, lx2, ly2;
 570
 571   g_return_if_fail (widget != NULL);
 572   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 573
 574   item = GTK_TREE_ITEM(widget);
 575   tree = GTK_TREE(widget->parent);
 576
 577   /* draw vertical line */
 578   lx1 = item->pixmaps_box->allocation.width;
 579   lx1 = lx2 = ((lx1 / 2) + (lx1 % 2) +
 580                GTK_CONTAINER (widget)->border_width + 1 + tree->current_indent);
 581   ly1 = 0;
 582   ly2 = widget->allocation.height;
 583
 584   if (g_list_last (tree->children)->data == widget)
 585     ly2 = (ly2 / 2) + (ly2 % 2);
 586
 587   if (tree != tree->root_tree)
 588     gdk_draw_line (widget->window, widget->style->black_gc, lx1, ly1, lx2, ly2);
 589
 590   /* draw vertical line for subtree connecting */
 591   if(g_list_last(tree->children)->data != (gpointer)widget)
 592     ly2 = (ly2 / 2) + (ly2 % 2);
 593
 594   lx2 += DEFAULT_DELTA;
 595
 596   if (item->subtree && item->expanded)
 597     gdk_draw_line (widget->window, widget->style->black_gc,
 598                    lx2, ly2, lx2, widget->allocation.height);
 599
 600   /* draw horizontal line */
 601   ly1 = ly2;
 602   lx2 += 2;
 603
 604   gdk_draw_line (widget->window, widget->style->black_gc,
 605                  lx1, ly1, lx2, ly2);
 606
 607   lx2 -= DEFAULT_DELTA+2;
 608   ly1 = 0;
 609   ly2 = widget->allocation.height;
 610
 611   if (tree != tree->root_tree)
 612     {
 613       item = GTK_TREE_ITEM (tree->tree_owner);
 614       tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 615       while (tree != tree->root_tree)
 616         {
 617           lx1 = lx2 -= tree->indent_value;
 618
 619           if (g_list_last (tree->children)->data != item)
 620             gdk_draw_line (widget->window, widget->style->black_gc, lx1, ly1, lx2, ly2);
 621           item = GTK_TREE_ITEM (tree->tree_owner);
 622           tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 623         }
 624     }
 625 }
 626
 627 static void
 628 gtk_tree_item_draw (GtkWidget    *widget,
 629                     GdkRectangle *area)
 630 {
 631   GtkBin *bin;
 632   GdkRectangle child_area, item_area;
 633   GtkTreeItem* tree_item;
 634
 635   g_return_if_fail (widget != NULL);
 636   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 637   g_return_if_fail (area != NULL);
 638
 639   if (GTK_WIDGET_DRAWABLE (widget))
 640     {
 641       bin = GTK_BIN (widget);
 642       tree_item = GTK_TREE_ITEM(widget);
 643
 644       /* draw left size of tree item */
 645       item_area.x = 0;
 646       item_area.y = 0;
 647       item_area.width = (tree_item->pixmaps_box->allocation.width + DEFAULT_DELTA +
 648                          GTK_TREE (widget->parent)->current_indent + 2);
 649       item_area.height = widget->allocation.height;
 650
 651       if (gdk_rectangle_intersect(&item_area, area, &child_area))
 652         {
 653           if (widget->state == GTK_STATE_NORMAL)
 654             {
 655               gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 656               gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
 657             }
 658           else
 659             {
 660               if (!GTK_WIDGET_IS_SENSITIVE (widget))
 661                 gtk_paint_flat_box(widget->style, widget->window,
 662                                    widget->state, GTK_STATE_INSENSITIVE,
 663                                    area, widget, "treeitem",
 664                                    0, 0, -1, -1);
 665               else
 666                 gtk_paint_flat_box(widget->style, widget->window,
 667                                    widget->state, GTK_SHADOW_ETCHED_OUT,
 668                                    area, widget, "treeitem",
 669                                    0, 0, -1, -1);
 670             }
 671
 672           gtk_tree_item_draw_lines(widget);
 673
 674           if (tree_item->pixmaps_box &&
 675               GTK_WIDGET_VISIBLE(tree_item->pixmaps_box) &&
 676               gtk_widget_intersect (tree_item->pixmaps_box, area, &child_area))
 677             gtk_widget_draw (tree_item->pixmaps_box, &child_area);
 678         }
 679
 680       /* draw right side */
 681       if (gtk_widget_intersect (bin->child, area, &child_area))
 682         {
 683           if (bin->child &&
 684               GTK_WIDGET_VISIBLE(bin->child) &&
 685               gtk_widget_intersect (bin->child, area, &child_area))
 686             gtk_widget_draw (bin->child, &child_area);
 687         }
 688
 689       if (GTK_WIDGET_HAS_FOCUS (widget))
 690         gtk_paint_focus (widget->style, widget->window,
 691                          NULL, widget, "treeitem",
 692                          0, 0,
 693                          widget->allocation.width - 1,
 694                          widget->allocation.height - 1);
 695
 696     }
 697 }
 698
 699 static void
 700 gtk_tree_item_draw_focus (GtkWidget *widget)
 701 {
 702   g_return_if_fail (widget != NULL);
 703   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 704
 705   gtk_widget_draw(widget, NULL);
 706 }
 707
 708 static gint
 709 gtk_tree_item_button_press (GtkWidget      *widget,
 710                             GdkEventButton *event)
 711 {
 712
 713   g_return_val_if_fail (widget != NULL, FALSE);
 714   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 715   g_return_val_if_fail (event != NULL, FALSE);
 716
 717   if (event->type == GDK_BUTTON_PRESS
 718         && GTK_WIDGET_IS_SENSITIVE(widget)
 719         && !GTK_WIDGET_HAS_FOCUS (widget))
 720       gtk_widget_grab_focus (widget);
 721
 722   return FALSE;
 723 }
 724
 725 static gint
 726 gtk_tree_item_expose (GtkWidget      *widget,
 727                       GdkEventExpose *event)
 728 {
 729   g_return_val_if_fail (widget != NULL, FALSE);
 730   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 731   g_return_val_if_fail (event != NULL, FALSE);
 732
 733   if (GTK_WIDGET_DRAWABLE (widget))
 734     gtk_tree_item_draw(widget, &event->area);
 735
 736   return FALSE;
 737 }
 738
 739 static gint
 740 gtk_tree_item_focus_in (GtkWidget     *widget,
 741                         GdkEventFocus *event)
 742 {
 743   g_return_val_if_fail (widget != NULL, FALSE);
 744   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 745   g_return_val_if_fail (event != NULL, FALSE);
 746
 747   GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
 748   gtk_widget_draw_focus (widget);
 749
 750
 751   return FALSE;
 752 }
 753
 754 static gint
 755 gtk_tree_item_focus_out (GtkWidget     *widget,
 756                          GdkEventFocus *event)
 757 {
 758   g_return_val_if_fail (widget != NULL, FALSE);
 759   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 760   g_return_val_if_fail (event != NULL, FALSE);
 761
 762   GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
 763   gtk_widget_draw_focus (widget);
 764
 765
 766   return FALSE;
 767 }
 768
 769 static void
 770 gtk_real_tree_item_select (GtkItem *item)
 771 {
 772   GtkTreeItem *tree_item;
 773   GtkWidget *widget;
 774
 775   g_return_if_fail (item != NULL);
 776   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 777
 778   tree_item = GTK_TREE_ITEM (item);
 779   widget = GTK_WIDGET (item);
 780
 781   gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 782
 783   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 784     gtk_widget_set_state (GTK_TREE_ITEM (item)->pixmaps_box, GTK_STATE_SELECTED);
 785 }
 786
 787 static void
 788 gtk_real_tree_item_deselect (GtkItem *item)
 789 {
 790   GtkTreeItem *tree_item;
 791   GtkWidget *widget;
 792
 793   g_return_if_fail (item != NULL);
 794   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 795
 796   tree_item = GTK_TREE_ITEM (item);
 797   widget = GTK_WIDGET (item);
 798
 799   gtk_widget_set_state (widget, GTK_STATE_NORMAL);
 800
 801   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 802     gtk_widget_set_state (tree_item->pixmaps_box, GTK_STATE_NORMAL);
 803 }
 804
 805 static void
 806 gtk_real_tree_item_toggle (GtkItem *item)
 807 {
 808   g_return_if_fail (item != NULL);
 809   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 810
 811   if(!GTK_WIDGET_IS_SENSITIVE(item))
 812     return;
 813
 814   if (GTK_WIDGET (item)->parent && GTK_IS_TREE (GTK_WIDGET (item)->parent))
 815     gtk_tree_select_child (GTK_TREE (GTK_WIDGET (item)->parent),
 816                            GTK_WIDGET (item));
 817   else
 818     {
 819       /* Should we really bother with this bit? A listitem not in a list?
 820        * -Johannes Keukelaar
 821        * yes, always be on the safe side!
 822        * -timj
 823        */
 824       if (GTK_WIDGET (item)->state == GTK_STATE_SELECTED)
 825         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_NORMAL);
 826       else
 827         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 828     }
 829 }
 830
 831 static void
 832 gtk_real_tree_item_expand (GtkTreeItem *tree_item)
 833 {
 834   GtkTree* tree;
 835
 836   g_return_if_fail (tree_item != NULL);
 837   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 838
 839   if (tree_item->subtree && !tree_item->expanded)
 840     {
 841       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 842
 843       /* hide subtree widget */
 844       gtk_widget_show (tree_item->subtree);
 845
 846       /* hide button '+' and show button '-' */
 847       if (tree_item->pixmaps_box)
 848         {
 849           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 850                                 tree_item->plus_pix_widget);
 851           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 852                              tree_item->minus_pix_widget);
 853         }
 854       if (tree->root_tree)
 855         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 856       tree_item->expanded = TRUE;
 857     }
 858 }
 859
 860 static void
 861 gtk_real_tree_item_collapse (GtkTreeItem *tree_item)
 862 {
 863   GtkTree* tree;
 864
 865   g_return_if_fail (tree_item != NULL);
 866   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 867
 868   if (tree_item->subtree && tree_item->expanded)
 869     {
 870       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 871
 872       /* hide subtree widget */
 873       gtk_widget_hide (tree_item->subtree);
 874
 875       /* hide button '-' and show button '+' */
 876       if (tree_item->pixmaps_box)
 877         {
 878           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 879                                 tree_item->minus_pix_widget);
 880           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 881                              tree_item->plus_pix_widget);
 882         }
 883       if (tree->root_tree)
 884         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 885       tree_item->expanded = FALSE;
 886     }
 887 }
 888
 889 static void
 890 gtk_tree_item_destroy (GtkObject *object)
 891 {
 892   GtkTreeItem* item;
 893   GtkWidget* child;
 894
 895   g_return_if_fail (object != NULL);
 896   g_return_if_fail (GTK_IS_TREE_ITEM (object));
 897
 898 #ifdef TREE_DEBUG
 899   g_message("+ gtk_tree_item_destroy [object %#x]\n", (int)object);
 900 #endif /* TREE_DEBUG */
 901
 902   item = GTK_TREE_ITEM(object);
 903
 904   /* free sub tree if it exist */
 905   child = item->subtree;
 906   if (child)
 907     {
 908       gtk_widget_ref (child);
 909       gtk_widget_unparent (child);
 910       gtk_widget_destroy (child);
 911       gtk_widget_unref (child);
 912       item->subtree = NULL;
 913     }
 914
 915   /* free pixmaps box */
 916   child = item->pixmaps_box;
 917   if (child)
 918     {
 919       gtk_widget_ref (child);
 920       gtk_widget_unparent (child);
 921       gtk_widget_destroy (child);
 922       gtk_widget_unref (child);
 923       item->pixmaps_box = NULL;
 924     }
 925
 926
 927   /* destroy plus pixmap */
 928   if (item->plus_pix_widget)
 929     {
 930       gtk_widget_destroy (item->plus_pix_widget);
 931       gtk_widget_unref (item->plus_pix_widget);
 932       item->plus_pix_widget = NULL;
 933     }
 934
 935   /* destroy minus pixmap */
 936   if (item->minus_pix_widget)
 937     {
 938       gtk_widget_destroy (item->minus_pix_widget);
 939       gtk_widget_unref (item->minus_pix_widget);
 940       item->minus_pix_widget = NULL;
 941     }
 942
 943   /* By removing the pixmaps here, and not in unrealize, we depend on
 944    * the fact that a widget can never change colormap or visual.
 945    */
 946   gtk_tree_item_remove_pixmaps (item);
 947
 948   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 949
 950 #ifdef TREE_DEBUG
 951   g_message("- gtk_tree_item_destroy\n");
 952 #endif /* TREE_DEBUG */
 953 }
 954
 955 void
 956 gtk_tree_item_remove_subtree (GtkTreeItem* item)
 957 {
 958   g_return_if_fail (item != NULL);
 959   g_return_if_fail (GTK_IS_TREE_ITEM(item));
 960   g_return_if_fail (item->subtree != NULL);
 961
 962   if (GTK_TREE (item->subtree)->children)
 963     {
 964       /* The following call will remove the children and call
 965        * gtk_tree_item_remove_subtree() again. So we are done.
 966        */
 967       gtk_tree_remove_items (GTK_TREE (item->subtree),
 968                              GTK_TREE (item->subtree)->children);
 969       return;
 970     }
 971
 972   if (GTK_WIDGET_MAPPED (item->subtree))
 973     gtk_widget_unmap (item->subtree);
 974
 975   gtk_widget_unparent (item->subtree);
 976
 977   if (item->pixmaps_box)
 978     gtk_widget_hide (item->pixmaps_box);
 979
 980   item->subtree = NULL;
 981
 982   if (item->expanded)
 983     {
 984       item->expanded = FALSE;
 985       if (item->pixmaps_box)
 986         {
 987           gtk_container_remove (GTK_CONTAINER (item->pixmaps_box),
 988                                 item->minus_pix_widget);
 989           gtk_container_add (GTK_CONTAINER (item->pixmaps_box),
 990                              item->plus_pix_widget);
 991         }
 992     }
 993 }
 994
 995 static void
 996 gtk_tree_item_map (GtkWidget *widget)
 997 {
 998   GtkBin *bin;
 999   GtkTreeItem* item;
1000
1001   g_return_if_fail (widget != NULL);
1002   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
1003
1004   bin = GTK_BIN (widget);
1005   item = GTK_TREE_ITEM(widget);
1006
1007   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
1008
1009   if(item->pixmaps_box &&
1010      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
1011      !GTK_WIDGET_MAPPED (item->pixmaps_box))
1012     gtk_widget_map (item->pixmaps_box);
1013
1014   if (bin->child &&
1015       GTK_WIDGET_VISIBLE (bin->child) &&
1016       !GTK_WIDGET_MAPPED (bin->child))
1017     gtk_widget_map (bin->child);
1018
1019   gdk_window_show (widget->window);
1020 }
1021
1022 static void
1023 gtk_tree_item_unmap (GtkWidget *widget)
1024 {
1025   GtkBin *bin;
1026   GtkTreeItem* item;
1027
1028   g_return_if_fail (widget != NULL);
1029   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
1030
1031   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
1032   bin = GTK_BIN (widget);
1033   item = GTK_TREE_ITEM(widget);
1034
1035   gdk_window_hide (widget->window);
1036
1037   if(item->pixmaps_box &&
1038      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
1039      GTK_WIDGET_MAPPED (item->pixmaps_box))
1040     gtk_widget_unmap (bin->child);
1041
1042   if (bin->child &&
1043       GTK_WIDGET_VISIBLE (bin->child) &&
1044       GTK_WIDGET_MAPPED (bin->child))
1045     gtk_widget_unmap (bin->child);
1046 }
1047
1048 static void
1049 gtk_tree_item_forall (GtkContainer *container,
1050                       gboolean      include_internals,
1051                       GtkCallback   callback,
1052                       gpointer      callback_data)
1053 {
1054   GtkBin *bin;
1055   GtkTreeItem *tree_item;
1056
1057   g_return_if_fail (container != NULL);
1058   g_return_if_fail (GTK_IS_TREE_ITEM (container));
1059   g_return_if_fail (callback != NULL);
1060
1061   bin = GTK_BIN (container);
1062   tree_item = GTK_TREE_ITEM (container);
1063
1064   if (bin->child)
1065     (* callback) (bin->child, callback_data);
1066   if (include_internals && tree_item->subtree)
1067     (* callback) (tree_item->subtree, callback_data);
1068 }