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 <config.h>
  30 #include "gtklabel.h"
  31 #include "gtkeventbox.h"
  32 #include "gtkpixmap.h"
  33 #include "gtkmain.h"
  34 #include "gtkmarshalers.h"
  35 #include "gtksignal.h"
  36 #define GTK_ENABLE_BROKEN
  37 #include "gtktree.h"
  38 #include "gtktreeitem.h"
  39
  40 #include "tree_plus.xpm"
  41 #include "tree_minus.xpm"
  42
  43 #define DEFAULT_DELTA 9
  44
  45 enum {
  46   COLLAPSE_TREE,
  47   EXPAND_TREE,
  48   LAST_SIGNAL
  49 };
  50
  51 typedef struct _GtkTreePixmaps GtkTreePixmaps;
  52
  53 struct _GtkTreePixmaps {
  54   gint refcount;
  55   GdkColormap *colormap;
  56
  57   GdkPixmap *pixmap_plus;
  58   GdkPixmap *pixmap_minus;
  59   GdkBitmap *mask_plus;
  60   GdkBitmap *mask_minus;
  61 };
  62
  63 static GList *pixmaps = NULL;
  64
  65 static void gtk_tree_item_class_init (GtkTreeItemClass *klass);
  66 static void gtk_tree_item_init       (GtkTreeItem      *tree_item);
  67 static void gtk_tree_item_realize       (GtkWidget        *widget);
  68 static void gtk_tree_item_size_request  (GtkWidget        *widget,
  69                                          GtkRequisition   *requisition);
  70 static void gtk_tree_item_size_allocate (GtkWidget        *widget,
  71                                          GtkAllocation    *allocation);
  72 static void gtk_tree_item_paint         (GtkWidget        *widget,
  73                                          GdkRectangle     *area);
  74 static gint gtk_tree_item_button_press  (GtkWidget        *widget,
  75                                          GdkEventButton   *event);
  76 static gint gtk_tree_item_expose        (GtkWidget        *widget,
  77                                          GdkEventExpose   *event);
  78 static void gtk_tree_item_forall        (GtkContainer    *container,
  79                                          gboolean         include_internals,
  80                                          GtkCallback      callback,
  81                                          gpointer         callback_data);
  82
  83 static void gtk_real_tree_item_select   (GtkItem          *item);
  84 static void gtk_real_tree_item_deselect (GtkItem          *item);
  85 static void gtk_real_tree_item_toggle   (GtkItem          *item);
  86 static void gtk_real_tree_item_expand   (GtkTreeItem      *item);
  87 static void gtk_real_tree_item_collapse (GtkTreeItem      *item);
  88 static void gtk_real_tree_item_expand   (GtkTreeItem      *item);
  89 static void gtk_real_tree_item_collapse (GtkTreeItem      *item);
  90 static void gtk_tree_item_destroy        (GtkObject *object);
  91 static gint gtk_tree_item_subtree_button_click (GtkWidget *widget);
  92 static void gtk_tree_item_subtree_button_changed_state (GtkWidget *widget);
  93
  94 static void gtk_tree_item_map(GtkWidget*);
  95 static void gtk_tree_item_unmap(GtkWidget*);
  96
  97 static void gtk_tree_item_add_pixmaps    (GtkTreeItem       *tree_item);
  98 static void gtk_tree_item_remove_pixmaps (GtkTreeItem       *tree_item);
  99
 100 static GtkItemClass *parent_class = NULL;
 101 static guint tree_item_signals[LAST_SIGNAL] = { 0 };
 102
 103 GtkType
 104 gtk_tree_item_get_type (void)
 105 {
 106   static GtkType tree_item_type = 0;
 107
 108   if (!tree_item_type)
 109     {
 110       static const GtkTypeInfo tree_item_info =
 111       {
 112         "GtkTreeItem",
 113         sizeof (GtkTreeItem),
 114         sizeof (GtkTreeItemClass),
 115         (GtkClassInitFunc) gtk_tree_item_class_init,
 116         (GtkObjectInitFunc) gtk_tree_item_init,
 117         /* reserved_1 */ NULL,
 118         /* reserved_2 */ NULL,
 119         (GtkClassInitFunc) NULL,
 120       };
 121
 122       tree_item_type = gtk_type_unique (gtk_item_get_type (), &tree_item_info);
 123     }
 124
 125   return tree_item_type;
 126 }
 127
 128 static void
 129 gtk_tree_item_class_init (GtkTreeItemClass *class)
 130 {
 131   GtkObjectClass *object_class;
 132   GtkWidgetClass *widget_class;
 133   GtkContainerClass *container_class;
 134   GtkItemClass *item_class;
 135
 136   parent_class = gtk_type_class (GTK_TYPE_ITEM);
 137
 138   object_class = (GtkObjectClass*) class;
 139   widget_class = (GtkWidgetClass*) class;
 140   item_class = (GtkItemClass*) class;
 141   container_class = (GtkContainerClass*) class;
 142
 143   object_class->destroy = gtk_tree_item_destroy;
 144
 145   widget_class->realize = gtk_tree_item_realize;
 146   widget_class->size_request = gtk_tree_item_size_request;
 147   widget_class->size_allocate = gtk_tree_item_size_allocate;
 148   widget_class->button_press_event = gtk_tree_item_button_press;
 149   widget_class->expose_event = gtk_tree_item_expose;
 150   widget_class->map = gtk_tree_item_map;
 151   widget_class->unmap = gtk_tree_item_unmap;
 152
 153   container_class->forall = gtk_tree_item_forall;
 154
 155   item_class->select = gtk_real_tree_item_select;
 156   item_class->deselect = gtk_real_tree_item_deselect;
 157   item_class->toggle = gtk_real_tree_item_toggle;
 158
 159   class->expand = gtk_real_tree_item_expand;
 160   class->collapse = gtk_real_tree_item_collapse;
 161
 162   tree_item_signals[EXPAND_TREE] =
 163     gtk_signal_new ("expand",
 164                     GTK_RUN_FIRST,
 165                     GTK_CLASS_TYPE (object_class),
 166                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, expand),
 167                     _gtk_marshal_VOID__VOID,
 168                     GTK_TYPE_NONE, 0);
 169   tree_item_signals[COLLAPSE_TREE] =
 170     gtk_signal_new ("collapse",
 171                     GTK_RUN_FIRST,
 172                     GTK_CLASS_TYPE (object_class),
 173                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, collapse),
 174                     _gtk_marshal_VOID__VOID,
 175                     GTK_TYPE_NONE, 0);
 176 }
 177
 178 /* callback for event box mouse event */
 179 static gint
 180 gtk_tree_item_subtree_button_click (GtkWidget *widget)
 181 {
 182   GtkTreeItem* item;
 183
 184   g_return_val_if_fail (GTK_IS_EVENT_BOX (widget), FALSE);
 185
 186   item = (GtkTreeItem*) gtk_object_get_user_data (GTK_OBJECT (widget));
 187   if (!GTK_WIDGET_IS_SENSITIVE (item))
 188     return FALSE;
 189
 190   if (item->expanded)
 191     gtk_tree_item_collapse (item);
 192   else
 193     gtk_tree_item_expand (item);
 194
 195   return TRUE;
 196 }
 197
 198 /* callback for event box state changed */
 199 static void
 200 gtk_tree_item_subtree_button_changed_state (GtkWidget *widget)
 201 {
 202   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 203
 204   if (GTK_WIDGET_VISIBLE (widget))
 205     {
 206
 207       if (widget->state == GTK_STATE_NORMAL)
 208         gdk_window_set_background (widget->window, &widget->style->base[widget->state]);
 209       else
 210         gdk_window_set_background (widget->window, &widget->style->bg[widget->state]);
 211
 212       if (GTK_WIDGET_DRAWABLE (widget))
 213         gdk_window_clear_area (widget->window, 0, 0,
 214                                widget->allocation.width, widget->allocation.height);
 215     }
 216 }
 217
 218 static void
 219 gtk_tree_item_init (GtkTreeItem *tree_item)
 220 {
 221   GtkWidget *eventbox, *pixmapwid;
 222
 223   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 224
 225   tree_item->expanded = FALSE;
 226   tree_item->subtree = NULL;
 227   GTK_WIDGET_SET_FLAGS (tree_item, GTK_CAN_FOCUS);
 228
 229   /* create an event box containing one pixmaps */
 230   eventbox = gtk_event_box_new();
 231   gtk_widget_set_events (eventbox, GDK_BUTTON_PRESS_MASK);
 232   gtk_signal_connect(GTK_OBJECT(eventbox), "state_changed",
 233                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 234                      (gpointer)NULL);
 235   gtk_signal_connect(GTK_OBJECT(eventbox), "realize",
 236                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 237                      (gpointer)NULL);
 238   gtk_signal_connect(GTK_OBJECT(eventbox), "button_press_event",
 239                      (GtkSignalFunc)gtk_tree_item_subtree_button_click,
 240                      (gpointer)NULL);
 241   gtk_object_set_user_data(GTK_OBJECT(eventbox), tree_item);
 242   tree_item->pixmaps_box = eventbox;
 243
 244   /* create pixmap for button '+' */
 245   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 246   if (!tree_item->expanded)
 247     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 248   gtk_widget_show (pixmapwid);
 249   tree_item->plus_pix_widget = pixmapwid;
 250   gtk_widget_ref (tree_item->plus_pix_widget);
 251   gtk_object_sink (GTK_OBJECT (tree_item->plus_pix_widget));
 252
 253   /* create pixmap for button '-' */
 254   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 255   if (tree_item->expanded)
 256     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 257   gtk_widget_show (pixmapwid);
 258   tree_item->minus_pix_widget = pixmapwid;
 259   gtk_widget_ref (tree_item->minus_pix_widget);
 260   gtk_object_sink (GTK_OBJECT (tree_item->minus_pix_widget));
 261
 262   gtk_widget_set_parent (eventbox, GTK_WIDGET (tree_item));
 263 }
 264
 265
 266 GtkWidget*
 267 gtk_tree_item_new (void)
 268 {
 269   GtkWidget *tree_item;
 270
 271   tree_item = GTK_WIDGET (gtk_type_new (gtk_tree_item_get_type ()));
 272
 273   return tree_item;
 274 }
 275
 276 GtkWidget*
 277 gtk_tree_item_new_with_label (const gchar *label)
 278 {
 279   GtkWidget *tree_item;
 280   GtkWidget *label_widget;
 281
 282   tree_item = gtk_tree_item_new ();
 283   label_widget = gtk_label_new (label);
 284   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 285
 286   gtk_container_add (GTK_CONTAINER (tree_item), label_widget);
 287   gtk_widget_show (label_widget);
 288
 289
 290   return tree_item;
 291 }
 292
 293 void
 294 gtk_tree_item_set_subtree (GtkTreeItem *tree_item,
 295                            GtkWidget   *subtree)
 296 {
 297   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 298   g_return_if_fail (GTK_IS_TREE (subtree));
 299
 300   if (tree_item->subtree)
 301     {
 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   if (tree_item->expanded)
 314     gtk_widget_show (subtree);
 315   else
 316     gtk_widget_hide (subtree);
 317
 318   gtk_widget_set_parent (subtree, GTK_WIDGET (tree_item)->parent);
 319 }
 320
 321 void
 322 gtk_tree_item_select (GtkTreeItem *tree_item)
 323 {
 324   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 325
 326   gtk_item_select (GTK_ITEM (tree_item));
 327 }
 328
 329 void
 330 gtk_tree_item_deselect (GtkTreeItem *tree_item)
 331 {
 332   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 333
 334   gtk_item_deselect (GTK_ITEM (tree_item));
 335 }
 336
 337 void
 338 gtk_tree_item_expand (GtkTreeItem *tree_item)
 339 {
 340   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 341
 342   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[EXPAND_TREE], NULL);
 343 }
 344
 345 void
 346 gtk_tree_item_collapse (GtkTreeItem *tree_item)
 347 {
 348   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 349
 350   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[COLLAPSE_TREE], NULL);
 351 }
 352
 353 static void
 354 gtk_tree_item_add_pixmaps (GtkTreeItem *tree_item)
 355 {
 356   GList *tmp_list;
 357   GdkColormap *colormap;
 358   GtkTreePixmaps *pixmap_node = NULL;
 359
 360   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 361
 362   if (tree_item->pixmaps)
 363     return;
 364
 365   colormap = gtk_widget_get_colormap (GTK_WIDGET (tree_item));
 366
 367   tmp_list = pixmaps;
 368   while (tmp_list)
 369     {
 370       pixmap_node = (GtkTreePixmaps *)tmp_list->data;
 371
 372       if (pixmap_node->colormap == colormap)
 373         break;
 374
 375       tmp_list = tmp_list->next;
 376     }
 377
 378   if (tmp_list)
 379     {
 380       pixmap_node->refcount++;
 381       tree_item->pixmaps = tmp_list;
 382     }
 383   else
 384     {
 385       pixmap_node = g_new (GtkTreePixmaps, 1);
 386
 387       pixmap_node->colormap = colormap;
 388       g_object_ref (colormap);
 389
 390       pixmap_node->refcount = 1;
 391
 392       /* create pixmaps for plus icon */
 393       pixmap_node->pixmap_plus =
 394         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 395                                       &pixmap_node->mask_plus,
 396                                       NULL,
 397                                       (gchar **)tree_plus);
 398
 399       /* create pixmaps for minus icon */
 400       pixmap_node->pixmap_minus =
 401         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 402                                       &pixmap_node->mask_minus,
 403                                       NULL,
 404                                       (gchar **)tree_minus);
 405
 406       tree_item->pixmaps = pixmaps = g_list_prepend (pixmaps, pixmap_node);
 407     }
 408
 409   gtk_pixmap_set (GTK_PIXMAP (tree_item->plus_pix_widget),
 410                   pixmap_node->pixmap_plus, pixmap_node->mask_plus);
 411   gtk_pixmap_set (GTK_PIXMAP (tree_item->minus_pix_widget),
 412                   pixmap_node->pixmap_minus, pixmap_node->mask_minus);
 413 }
 414
 415 static void
 416 gtk_tree_item_remove_pixmaps (GtkTreeItem *tree_item)
 417 {
 418   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 419
 420   if (tree_item->pixmaps)
 421     {
 422       GtkTreePixmaps *pixmap_node = (GtkTreePixmaps *)tree_item->pixmaps->data;
 423
 424       g_assert (pixmap_node->refcount > 0);
 425
 426       if (--pixmap_node->refcount == 0)
 427         {
 428           g_object_unref (pixmap_node->colormap);
 429           g_object_unref (pixmap_node->pixmap_plus);
 430           g_object_unref (pixmap_node->mask_plus);
 431           g_object_unref (pixmap_node->pixmap_minus);
 432           g_object_unref (pixmap_node->mask_minus);
 433
 434           pixmaps = g_list_remove_link (pixmaps, tree_item->pixmaps);
 435           g_list_free_1 (tree_item->pixmaps);
 436           g_free (pixmap_node);
 437         }
 438
 439       tree_item->pixmaps = NULL;
 440     }
 441 }
 442
 443 static void
 444 gtk_tree_item_realize (GtkWidget *widget)
 445 {
 446   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 447
 448   if (GTK_WIDGET_CLASS (parent_class)->realize)
 449     (* GTK_WIDGET_CLASS (parent_class)->realize) (widget);
 450
 451   gdk_window_set_background (widget->window,
 452                              &widget->style->base[GTK_STATE_NORMAL]);
 453
 454   gtk_tree_item_add_pixmaps (GTK_TREE_ITEM (widget));
 455 }
 456
 457 static void
 458 gtk_tree_item_size_request (GtkWidget      *widget,
 459                             GtkRequisition *requisition)
 460 {
 461   GtkBin *bin;
 462   GtkTreeItem* item;
 463   GtkRequisition child_requisition;
 464
 465   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 466   g_return_if_fail (requisition != NULL);
 467
 468   bin = GTK_BIN (widget);
 469   item = GTK_TREE_ITEM(widget);
 470
 471   requisition->width = (GTK_CONTAINER (widget)->border_width +
 472                         widget->style->xthickness) * 2;
 473   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 474
 475   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 476     {
 477       GtkRequisition pix_requisition;
 478
 479       gtk_widget_size_request (bin->child, &child_requisition);
 480
 481       requisition->width += child_requisition.width;
 482
 483       gtk_widget_size_request (item->pixmaps_box,
 484                                &pix_requisition);
 485       requisition->width += pix_requisition.width + DEFAULT_DELTA +
 486         GTK_TREE (widget->parent)->current_indent;
 487
 488       requisition->height += MAX (child_requisition.height,
 489                                   pix_requisition.height);
 490     }
 491 }
 492
 493 static void
 494 gtk_tree_item_size_allocate (GtkWidget     *widget,
 495                              GtkAllocation *allocation)
 496 {
 497   GtkBin *bin;
 498   GtkTreeItem* item;
 499   GtkAllocation child_allocation;
 500   gint border_width;
 501   int temp;
 502
 503   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 504   g_return_if_fail (allocation != NULL);
 505
 506   widget->allocation = *allocation;
 507   if (GTK_WIDGET_REALIZED (widget))
 508     gdk_window_move_resize (widget->window,
 509                             allocation->x, allocation->y,
 510                             allocation->width, allocation->height);
 511
 512   bin = GTK_BIN (widget);
 513   item = GTK_TREE_ITEM(widget);
 514
 515   if (bin->child)
 516     {
 517       border_width = (GTK_CONTAINER (widget)->border_width +
 518                       widget->style->xthickness);
 519
 520       child_allocation.x = border_width + GTK_TREE(widget->parent)->current_indent;
 521       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 522
 523       child_allocation.width = item->pixmaps_box->requisition.width;
 524       child_allocation.height = item->pixmaps_box->requisition.height;
 525
 526       temp = allocation->height - child_allocation.height;
 527       child_allocation.y += ( temp / 2 ) + ( temp % 2 );
 528
 529       gtk_widget_size_allocate (item->pixmaps_box, &child_allocation);
 530
 531       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 532       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 533       child_allocation.x += item->pixmaps_box->requisition.width+DEFAULT_DELTA;
 534
 535       child_allocation.width =
 536         MAX (1, (gint)allocation->width - ((gint)child_allocation.x + border_width));
 537
 538       gtk_widget_size_allocate (bin->child, &child_allocation);
 539     }
 540 }
 541
 542 static void
 543 gtk_tree_item_draw_lines (GtkWidget *widget)
 544 {
 545   GtkTreeItem* item;
 546   GtkTree* tree;
 547   guint lx1, ly1, lx2, ly2;
 548   GdkGC* gc;
 549
 550   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 551
 552   item = GTK_TREE_ITEM(widget);
 553   tree = GTK_TREE(widget->parent);
 554
 555   if (!tree->view_line)
 556     return;
 557
 558   gc = widget->style->text_gc[GTK_STATE_NORMAL];
 559
 560   /* draw vertical line */
 561   lx1 = item->pixmaps_box->allocation.width;
 562   lx1 = lx2 = ((lx1 / 2) + (lx1 % 2) +
 563                GTK_CONTAINER (widget)->border_width + 1 + tree->current_indent);
 564   ly1 = 0;
 565   ly2 = widget->allocation.height;
 566
 567   if (g_list_last (tree->children)->data == widget)
 568     ly2 = (ly2 / 2) + (ly2 % 2);
 569
 570   if (tree != tree->root_tree)
 571     gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 572
 573   /* draw vertical line for subtree connecting */
 574   if(g_list_last(tree->children)->data != (gpointer)widget)
 575     ly2 = (ly2 / 2) + (ly2 % 2);
 576
 577   lx2 += DEFAULT_DELTA;
 578
 579   if (item->subtree && item->expanded)
 580     gdk_draw_line (widget->window, gc,
 581                    lx2, ly2, lx2, widget->allocation.height);
 582
 583   /* draw horizontal line */
 584   ly1 = ly2;
 585   lx2 += 2;
 586
 587   gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 588
 589   lx2 -= DEFAULT_DELTA+2;
 590   ly1 = 0;
 591   ly2 = widget->allocation.height;
 592
 593   if (tree != tree->root_tree)
 594     {
 595       item = GTK_TREE_ITEM (tree->tree_owner);
 596       tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 597       while (tree != tree->root_tree)
 598         {
 599           lx1 = lx2 -= tree->indent_value;
 600
 601           if (g_list_last (tree->children)->data != item)
 602             gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);
 603           item = GTK_TREE_ITEM (tree->tree_owner);
 604           tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 605         }
 606     }
 607 }
 608
 609 static void
 610 gtk_tree_item_paint (GtkWidget    *widget,
 611                      GdkRectangle *area)
 612 {
 613   GtkBin *bin;
 614   GdkRectangle child_area, item_area;
 615   GtkTreeItem* tree_item;
 616
 617   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 618   g_return_if_fail (area != NULL);
 619
 620   /* FIXME: We should honor tree->view_mode, here - I think
 621    * the desired effect is that when the mode is VIEW_ITEM,
 622    * only the subitem is drawn as selected, not the entire
 623    * line. (Like the way that the tree in Windows Explorer
 624    * works).
 625    */
 626   if (GTK_WIDGET_DRAWABLE (widget))
 627     {
 628       bin = GTK_BIN (widget);
 629       tree_item = GTK_TREE_ITEM(widget);
 630
 631       if (widget->state == GTK_STATE_NORMAL)
 632         {
 633           gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 634           gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
 635         }
 636       else
 637         {
 638           if (!GTK_WIDGET_IS_SENSITIVE (widget))
 639             gtk_paint_flat_box(widget->style, widget->window,
 640                                widget->state, GTK_SHADOW_NONE,
 641                                area, widget, "treeitem",
 642                                0, 0, -1, -1);
 643           else
 644             gtk_paint_flat_box(widget->style, widget->window,
 645                                widget->state, GTK_SHADOW_ETCHED_OUT,
 646                                area, widget, "treeitem",
 647                                0, 0, -1, -1);
 648         }
 649
 650       /* draw left size of tree item */
 651       item_area.x = 0;
 652       item_area.y = 0;
 653       item_area.width = (tree_item->pixmaps_box->allocation.width + DEFAULT_DELTA +
 654                          GTK_TREE (widget->parent)->current_indent + 2);
 655       item_area.height = widget->allocation.height;
 656
 657
 658       if (gdk_rectangle_intersect(&item_area, area, &child_area))
 659         {
 660
 661           gtk_tree_item_draw_lines(widget);
 662
 663           if (tree_item->pixmaps_box &&
 664               GTK_WIDGET_VISIBLE(tree_item->pixmaps_box) &&
 665               gtk_widget_intersect (tree_item->pixmaps_box, area, &child_area))
 666             gtk_widget_draw (tree_item->pixmaps_box, &child_area);
 667         }
 668
 669       if (GTK_WIDGET_HAS_FOCUS (widget))
 670         gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget),
 671                          NULL, widget, "treeitem",
 672                          0, 0,
 673                          widget->allocation.width,
 674                          widget->allocation.height);
 675
 676     }
 677 }
 678
 679 static gint
 680 gtk_tree_item_button_press (GtkWidget      *widget,
 681                             GdkEventButton *event)
 682 {
 683
 684   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 685   g_return_val_if_fail (event != NULL, FALSE);
 686
 687   if (event->type == GDK_BUTTON_PRESS
 688         && GTK_WIDGET_IS_SENSITIVE(widget)
 689         && !GTK_WIDGET_HAS_FOCUS (widget))
 690       gtk_widget_grab_focus (widget);
 691
 692   return (event->type == GDK_BUTTON_PRESS && GTK_WIDGET_IS_SENSITIVE(widget));
 693 }
 694
 695 static void
 696 gtk_tree_item_expose_child (GtkWidget *child,
 697                             gpointer   client_data)
 698 {
 699   struct {
 700     GtkWidget *container;
 701     GdkEventExpose *event;
 702   } *data = client_data;
 703
 704   if (GTK_WIDGET_DRAWABLE (child) &&
 705       GTK_WIDGET_NO_WINDOW (child) &&
 706       (child->window == data->event->window))
 707     {
 708       GdkEvent *child_event = gdk_event_new (GDK_EXPOSE);
 709       child_event->expose = *data->event;
 710       g_object_ref (child_event->expose.window);
 711
 712       child_event->expose.region = gtk_widget_region_intersect (child,
 713                                                                 data->event->region);
 714       if (!gdk_region_empty (child_event->expose.region))
 715         {
 716           gdk_region_get_clipbox (child_event->expose.region, &child_event->expose.area);
 717           gtk_widget_send_expose (child, child_event);
 718         }
 719       gdk_event_free (child_event);
 720     }
 721 }
 722
 723 static gint
 724 gtk_tree_item_expose (GtkWidget      *widget,
 725                       GdkEventExpose *event)
 726 {
 727   struct {
 728     GtkWidget *container;
 729     GdkEventExpose *event;
 730   } data;
 731
 732   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 733   g_return_val_if_fail (event != NULL, FALSE);
 734
 735   if (GTK_WIDGET_DRAWABLE (widget))
 736     {
 737       gtk_tree_item_paint (widget, &event->area);
 738
 739       data.container = widget;
 740       data.event = event;
 741
 742       gtk_container_forall (GTK_CONTAINER (widget),
 743                             gtk_tree_item_expose_child,
 744                             &data);
 745    }
 746
 747   return FALSE;
 748 }
 749
 750 static void
 751 gtk_real_tree_item_select (GtkItem *item)
 752 {
 753   GtkTreeItem *tree_item;
 754   GtkWidget *widget;
 755
 756   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 757
 758   tree_item = GTK_TREE_ITEM (item);
 759   widget = GTK_WIDGET (item);
 760
 761   gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 762
 763   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 764     gtk_widget_set_state (GTK_TREE_ITEM (item)->pixmaps_box, GTK_STATE_SELECTED);
 765 }
 766
 767 static void
 768 gtk_real_tree_item_deselect (GtkItem *item)
 769 {
 770   GtkTreeItem *tree_item;
 771   GtkWidget *widget;
 772
 773   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 774
 775   tree_item = GTK_TREE_ITEM (item);
 776   widget = GTK_WIDGET (item);
 777
 778   gtk_widget_set_state (widget, GTK_STATE_NORMAL);
 779
 780   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 781     gtk_widget_set_state (tree_item->pixmaps_box, GTK_STATE_NORMAL);
 782 }
 783
 784 static void
 785 gtk_real_tree_item_toggle (GtkItem *item)
 786 {
 787   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 788
 789   if(!GTK_WIDGET_IS_SENSITIVE(item))
 790     return;
 791
 792   if (GTK_WIDGET (item)->parent && GTK_IS_TREE (GTK_WIDGET (item)->parent))
 793     gtk_tree_select_child (GTK_TREE (GTK_WIDGET (item)->parent),
 794                            GTK_WIDGET (item));
 795   else
 796     {
 797       /* Should we really bother with this bit? A listitem not in a list?
 798        * -Johannes Keukelaar
 799        * yes, always be on the safe side!
 800        * -timj
 801        */
 802       if (GTK_WIDGET (item)->state == GTK_STATE_SELECTED)
 803         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_NORMAL);
 804       else
 805         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 806     }
 807 }
 808
 809 static void
 810 gtk_real_tree_item_expand (GtkTreeItem *tree_item)
 811 {
 812   GtkTree* tree;
 813
 814   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 815
 816   if (tree_item->subtree && !tree_item->expanded)
 817     {
 818       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 819
 820       /* hide subtree widget */
 821       gtk_widget_show (tree_item->subtree);
 822
 823       /* hide button '+' and show button '-' */
 824       if (tree_item->pixmaps_box)
 825         {
 826           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 827                                 tree_item->plus_pix_widget);
 828           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 829                              tree_item->minus_pix_widget);
 830         }
 831       if (tree->root_tree)
 832         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 833       tree_item->expanded = TRUE;
 834     }
 835 }
 836
 837 static void
 838 gtk_real_tree_item_collapse (GtkTreeItem *tree_item)
 839 {
 840   GtkTree* tree;
 841
 842   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 843
 844   if (tree_item->subtree && tree_item->expanded)
 845     {
 846       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 847
 848       /* hide subtree widget */
 849       gtk_widget_hide (tree_item->subtree);
 850
 851       /* hide button '-' and show button '+' */
 852       if (tree_item->pixmaps_box)
 853         {
 854           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 855                                 tree_item->minus_pix_widget);
 856           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 857                              tree_item->plus_pix_widget);
 858         }
 859       if (tree->root_tree)
 860         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 861       tree_item->expanded = FALSE;
 862     }
 863 }
 864
 865 static void
 866 gtk_tree_item_destroy (GtkObject *object)
 867 {
 868   GtkTreeItem* item;
 869   GtkWidget* child;
 870
 871   g_return_if_fail (GTK_IS_TREE_ITEM (object));
 872
 873 #ifdef TREE_DEBUG
 874   g_message("+ gtk_tree_item_destroy [object %#x]\n", (int)object);
 875 #endif /* TREE_DEBUG */
 876
 877   item = GTK_TREE_ITEM(object);
 878
 879   /* free sub tree if it exist */
 880   child = item->subtree;
 881   if (child)
 882     {
 883       gtk_widget_ref (child);
 884       gtk_widget_unparent (child);
 885       gtk_widget_destroy (child);
 886       gtk_widget_unref (child);
 887       item->subtree = NULL;
 888     }
 889
 890   /* free pixmaps box */
 891   child = item->pixmaps_box;
 892   if (child)
 893     {
 894       gtk_widget_ref (child);
 895       gtk_widget_unparent (child);
 896       gtk_widget_destroy (child);
 897       gtk_widget_unref (child);
 898       item->pixmaps_box = NULL;
 899     }
 900
 901
 902   /* destroy plus pixmap */
 903   if (item->plus_pix_widget)
 904     {
 905       gtk_widget_destroy (item->plus_pix_widget);
 906       gtk_widget_unref (item->plus_pix_widget);
 907       item->plus_pix_widget = NULL;
 908     }
 909
 910   /* destroy minus pixmap */
 911   if (item->minus_pix_widget)
 912     {
 913       gtk_widget_destroy (item->minus_pix_widget);
 914       gtk_widget_unref (item->minus_pix_widget);
 915       item->minus_pix_widget = NULL;
 916     }
 917
 918   /* By removing the pixmaps here, and not in unrealize, we depend on
 919    * the fact that a widget can never change colormap or visual.
 920    */
 921   gtk_tree_item_remove_pixmaps (item);
 922
 923   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 924
 925 #ifdef TREE_DEBUG
 926   g_message("- gtk_tree_item_destroy\n");
 927 #endif /* TREE_DEBUG */
 928 }
 929
 930 void
 931 gtk_tree_item_remove_subtree (GtkTreeItem* item)
 932 {
 933   g_return_if_fail (GTK_IS_TREE_ITEM(item));
 934   g_return_if_fail (item->subtree != NULL);
 935
 936   if (GTK_TREE (item->subtree)->children)
 937     {
 938       /* The following call will remove the children and call
 939        * gtk_tree_item_remove_subtree() again. So we are done.
 940        */
 941       gtk_tree_remove_items (GTK_TREE (item->subtree),
 942                              GTK_TREE (item->subtree)->children);
 943       return;
 944     }
 945
 946   if (GTK_WIDGET_MAPPED (item->subtree))
 947     gtk_widget_unmap (item->subtree);
 948
 949   gtk_widget_unparent (item->subtree);
 950
 951   if (item->pixmaps_box)
 952     gtk_widget_hide (item->pixmaps_box);
 953
 954   item->subtree = NULL;
 955
 956   if (item->expanded)
 957     {
 958       item->expanded = FALSE;
 959       if (item->pixmaps_box)
 960         {
 961           gtk_container_remove (GTK_CONTAINER (item->pixmaps_box),
 962                                 item->minus_pix_widget);
 963           gtk_container_add (GTK_CONTAINER (item->pixmaps_box),
 964                              item->plus_pix_widget);
 965         }
 966     }
 967 }
 968
 969 static void
 970 gtk_tree_item_map (GtkWidget *widget)
 971 {
 972   GtkBin *bin;
 973   GtkTreeItem* item;
 974
 975   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 976
 977   bin = GTK_BIN (widget);
 978   item = GTK_TREE_ITEM(widget);
 979
 980   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 981
 982   if(item->pixmaps_box &&
 983      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
 984      !GTK_WIDGET_MAPPED (item->pixmaps_box))
 985     gtk_widget_map (item->pixmaps_box);
 986
 987   if (bin->child &&
 988       GTK_WIDGET_VISIBLE (bin->child) &&
 989       !GTK_WIDGET_MAPPED (bin->child))
 990     gtk_widget_map (bin->child);
 991
 992   gdk_window_show (widget->window);
 993 }
 994
 995 static void
 996 gtk_tree_item_unmap (GtkWidget *widget)
 997 {
 998   GtkBin *bin;
 999   GtkTreeItem* item;
1000
1001   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
1002
1003   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
1004   bin = GTK_BIN (widget);
1005   item = GTK_TREE_ITEM(widget);
1006
1007   gdk_window_hide (widget->window);
1008
1009   if(item->pixmaps_box &&
1010      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
1011      GTK_WIDGET_MAPPED (item->pixmaps_box))
1012     gtk_widget_unmap (bin->child);
1013
1014   if (bin->child &&
1015       GTK_WIDGET_VISIBLE (bin->child) &&
1016       GTK_WIDGET_MAPPED (bin->child))
1017     gtk_widget_unmap (bin->child);
1018 }
1019
1020 static void
1021 gtk_tree_item_forall (GtkContainer *container,
1022                       gboolean      include_internals,
1023                       GtkCallback   callback,
1024                       gpointer      callback_data)
1025 {
1026   GtkBin *bin;
1027   GtkTreeItem *tree_item;
1028
1029   g_return_if_fail (GTK_IS_TREE_ITEM (container));
1030   g_return_if_fail (callback != NULL);
1031
1032   bin = GTK_BIN (container);
1033   tree_item = GTK_TREE_ITEM (container);
1034
1035   if (bin->child)
1036     (* callback) (bin->child, callback_data);
1037   if (include_internals && tree_item->subtree)
1038     (* callback) (tree_item->subtree, callback_data);
1039 }