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 Free
  16  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18 #include "gtklabel.h"
  19 #include "gtktree.h"
  20 #include "gtktreeitem.h"
  21 #include "gtkeventbox.h"
  22 #include "gtkpixmap.h"
  23 #include "gtkmain.h"
  24 #include "gtksignal.h"
  25
  26 #include "tree_plus.xpm"
  27 #include "tree_minus.xpm"
  28
  29 #define DEFAULT_DELTA 9
  30
  31 enum {
  32   COLLAPSE_TREE,
  33   EXPAND_TREE,
  34   LAST_SIGNAL
  35 };
  36
  37 typedef struct _GtkTreePixmaps GtkTreePixmaps;
  38
  39 struct _GtkTreePixmaps {
  40   gint refcount;
  41   GdkColormap *colormap;
  42
  43   GdkPixmap *pixmap_plus;
  44   GdkPixmap *pixmap_minus;
  45   GdkBitmap *mask_plus;
  46   GdkBitmap *mask_minus;
  47 };
  48
  49 static GList *pixmaps = NULL;
  50
  51 typedef void (*GtkTreeItemSignal) (GtkObject *object,
  52                                    gpointer   arg1,
  53                                    gpointer   data);
  54
  55 static void gtk_tree_item_class_init (GtkTreeItemClass *klass);
  56 static void gtk_tree_item_init       (GtkTreeItem      *tree_item);
  57 static void gtk_tree_item_realize       (GtkWidget        *widget);
  58 static void gtk_tree_item_size_request  (GtkWidget        *widget,
  59                                          GtkRequisition   *requisition);
  60 static void gtk_tree_item_size_allocate (GtkWidget        *widget,
  61                                          GtkAllocation    *allocation);
  62 static void gtk_tree_item_draw          (GtkWidget        *widget,
  63                                          GdkRectangle     *area);
  64 static void gtk_tree_item_draw_focus    (GtkWidget        *widget);
  65 static gint gtk_tree_item_button_press  (GtkWidget        *widget,
  66                                          GdkEventButton   *event);
  67 static gint gtk_tree_item_expose        (GtkWidget        *widget,
  68                                          GdkEventExpose   *event);
  69 static gint gtk_tree_item_focus_in      (GtkWidget        *widget,
  70                                          GdkEventFocus    *event);
  71 static gint gtk_tree_item_focus_out     (GtkWidget        *widget,
  72                                          GdkEventFocus    *event);
  73 static void gtk_real_tree_item_select   (GtkItem          *item);
  74 static void gtk_real_tree_item_deselect (GtkItem          *item);
  75 static void gtk_real_tree_item_toggle   (GtkItem          *item);
  76 static void gtk_real_tree_item_expand   (GtkTreeItem      *item);
  77 static void gtk_real_tree_item_collapse (GtkTreeItem      *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_tree_item_destroy        (GtkObject *object);
  81 static void gtk_tree_item_subtree_button_click (GtkWidget *widget);
  82 static void gtk_tree_item_subtree_button_changed_state (GtkWidget *widget);
  83
  84 static void gtk_tree_item_map(GtkWidget*);
  85 static void gtk_tree_item_unmap(GtkWidget*);
  86
  87 static void gtk_tree_item_add_pixmaps    (GtkTreeItem       *tree_item);
  88 static void gtk_tree_item_remove_pixmaps (GtkTreeItem       *tree_item);
  89
  90 static GtkItemClass *parent_class = NULL;
  91 static GtkContainerClass *container_class = NULL;
  92 static guint tree_item_signals[LAST_SIGNAL] = { 0 };
  93
  94 guint
  95 gtk_tree_item_get_type ()
  96 {
  97   static guint tree_item_type = 0;
  98
  99   if (!tree_item_type)
 100     {
 101       GtkTypeInfo tree_item_info =
 102       {
 103         "GtkTreeItem",
 104         sizeof (GtkTreeItem),
 105         sizeof (GtkTreeItemClass),
 106         (GtkClassInitFunc) gtk_tree_item_class_init,
 107         (GtkObjectInitFunc) gtk_tree_item_init,
 108         (GtkArgSetFunc) NULL,
 109         (GtkArgGetFunc) NULL,
 110       };
 111
 112       tree_item_type = gtk_type_unique (gtk_item_get_type (), &tree_item_info);
 113     }
 114
 115   return tree_item_type;
 116 }
 117
 118 static void
 119 gtk_tree_item_class_init (GtkTreeItemClass *class)
 120 {
 121   GtkObjectClass *object_class;
 122   GtkWidgetClass *widget_class;
 123   GtkItemClass *item_class;
 124
 125   object_class = (GtkObjectClass*) class;
 126   widget_class = (GtkWidgetClass*) class;
 127   item_class = (GtkItemClass*) class;
 128   container_class = (GtkContainerClass*) class;
 129
 130   parent_class = gtk_type_class (gtk_item_get_type ());
 131
 132   tree_item_signals[EXPAND_TREE] =
 133     gtk_signal_new ("expand",
 134                     GTK_RUN_FIRST,
 135                     object_class->type,
 136                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, expand),
 137                     gtk_signal_default_marshaller,
 138                     GTK_TYPE_NONE, 0);
 139   tree_item_signals[COLLAPSE_TREE] =
 140     gtk_signal_new ("collapse",
 141                     GTK_RUN_FIRST,
 142                     object_class->type,
 143                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, collapse),
 144                     gtk_signal_default_marshaller,
 145                     GTK_TYPE_NONE, 0);
 146
 147   gtk_object_class_add_signals (object_class, tree_item_signals, LAST_SIGNAL);
 148
 149   object_class->destroy = gtk_tree_item_destroy;
 150
 151   widget_class->realize = gtk_tree_item_realize;
 152   widget_class->size_request = gtk_tree_item_size_request;
 153   widget_class->size_allocate = gtk_tree_item_size_allocate;
 154   widget_class->draw = gtk_tree_item_draw;
 155   widget_class->draw_focus = gtk_tree_item_draw_focus;
 156   widget_class->button_press_event = gtk_tree_item_button_press;
 157   widget_class->expose_event = gtk_tree_item_expose;
 158   widget_class->focus_in_event = gtk_tree_item_focus_in;
 159   widget_class->focus_out_event = gtk_tree_item_focus_out;
 160   widget_class->map = gtk_tree_item_map;
 161   widget_class->unmap = gtk_tree_item_unmap;
 162
 163   item_class->select = gtk_real_tree_item_select;
 164   item_class->deselect = gtk_real_tree_item_deselect;
 165   item_class->toggle = gtk_real_tree_item_toggle;
 166
 167   class->expand = gtk_real_tree_item_expand;
 168   class->collapse = gtk_real_tree_item_collapse;
 169
 170   container_class = (GtkContainerClass*) parent_class;
 171 }
 172
 173 /* callback for event box mouse event */
 174 static void
 175 gtk_tree_item_subtree_button_click (GtkWidget *widget)
 176 {
 177   GtkTreeItem* item;
 178
 179   g_return_if_fail (widget != NULL);
 180   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 181
 182   item = (GtkTreeItem*) gtk_object_get_user_data (GTK_OBJECT (widget));
 183   if (!GTK_WIDGET_IS_SENSITIVE (item))
 184     return;
 185
 186   if (item->expanded)
 187     gtk_tree_item_collapse (item);
 188   else
 189     gtk_tree_item_expand (item);
 190 }
 191
 192 /* callback for event box state changed */
 193 static void
 194 gtk_tree_item_subtree_button_changed_state (GtkWidget *widget)
 195 {
 196   g_return_if_fail (widget != NULL);
 197   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 198
 199   if (GTK_WIDGET_VISIBLE (widget))
 200     {
 201
 202       if (widget->state == GTK_STATE_NORMAL)
 203         gdk_window_set_background (widget->window, &widget->style->base[widget->state]);
 204       else
 205         gdk_window_set_background (widget->window, &widget->style->bg[widget->state]);
 206
 207       if (GTK_WIDGET_DRAWABLE (widget))
 208         gdk_window_clear_area (widget->window, 0, 0,
 209                                widget->allocation.width, widget->allocation.height);
 210     }
 211 }
 212
 213 static void
 214 gtk_tree_item_init (GtkTreeItem *tree_item)
 215 {
 216   GtkWidget *eventbox, *pixmapwid;
 217
 218   g_return_if_fail (tree_item != NULL);
 219   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 220
 221   tree_item->expanded = FALSE;
 222   tree_item->subtree = NULL;
 223   GTK_WIDGET_SET_FLAGS (tree_item, GTK_CAN_FOCUS);
 224
 225   /* create an event box containing one pixmaps */
 226   eventbox = gtk_event_box_new();
 227   gtk_widget_set_events (eventbox, GDK_BUTTON_PRESS_MASK);
 228   gtk_signal_connect(GTK_OBJECT(eventbox), "state_changed",
 229                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 230                      (gpointer)NULL);
 231   gtk_signal_connect(GTK_OBJECT(eventbox), "realize",
 232                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 233                      (gpointer)NULL);
 234   gtk_signal_connect(GTK_OBJECT(eventbox), "button_press_event",
 235                      (GtkSignalFunc)gtk_tree_item_subtree_button_click,
 236                      (gpointer)NULL);
 237   gtk_object_set_user_data(GTK_OBJECT(eventbox), tree_item);
 238   tree_item->pixmaps_box = eventbox;
 239
 240   /* create pixmap for button '+' */
 241   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 242   if (!tree_item->expanded)
 243     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 244   gtk_widget_show (pixmapwid);
 245   tree_item->plus_pix_widget = pixmapwid;
 246   gtk_widget_ref (tree_item->plus_pix_widget);
 247   gtk_object_sink (GTK_OBJECT (tree_item->plus_pix_widget));
 248
 249   /* create pixmap for button '-' */
 250   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 251   if (tree_item->expanded)
 252     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 253   gtk_widget_show (pixmapwid);
 254   tree_item->minus_pix_widget = pixmapwid;
 255   gtk_widget_ref (tree_item->minus_pix_widget);
 256   gtk_object_sink (GTK_OBJECT (tree_item->minus_pix_widget));
 257
 258   gtk_widget_set_parent (eventbox, GTK_WIDGET (tree_item));
 259 }
 260
 261
 262 GtkWidget*
 263 gtk_tree_item_new ()
 264 {
 265   GtkWidget *tree_item;
 266
 267   tree_item = GTK_WIDGET (gtk_type_new (gtk_tree_item_get_type ()));
 268
 269   return tree_item;
 270 }
 271
 272 GtkWidget*
 273 gtk_tree_item_new_with_label (gchar *label)
 274 {
 275   GtkWidget *tree_item;
 276   GtkWidget *label_widget;
 277
 278   tree_item = gtk_tree_item_new ();
 279   label_widget = gtk_label_new (label);
 280   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 281
 282   gtk_container_add (GTK_CONTAINER (tree_item), label_widget);
 283   gtk_widget_show (label_widget);
 284
 285
 286   return tree_item;
 287 }
 288
 289 void
 290 gtk_tree_item_set_subtree (GtkTreeItem *tree_item,
 291                            GtkWidget   *subtree)
 292 {
 293   g_return_if_fail (tree_item != NULL);
 294   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 295   g_return_if_fail (subtree != NULL);
 296   g_return_if_fail (GTK_IS_TREE (subtree));
 297
 298   if(tree_item->subtree) {
 299     g_warning("there is already a subtree for this tree item\n");
 300     return;
 301   }
 302
 303   tree_item->subtree = subtree;
 304   GTK_TREE(subtree)->tree_owner = GTK_WIDGET(tree_item);
 305
 306   /* set root tree for selection list */
 307   GTK_TREE(subtree)->root_tree = GTK_TREE(GTK_WIDGET(tree_item)->parent)->root_tree;
 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, 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, allocation->width - (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 == (gpointer)widget)
 585     ly2 = (ly2 / 2) + (ly2 % 2);
 586
 587   if(tree != tree->root_tree)
 588     gdk_draw_line(widget->window, widget->style->black_gc,
 589                   lx1, ly1, lx2, ly2);
 590
 591   /* draw vertical line for subtree connecting */
 592   if(g_list_last(tree->children)->data != (gpointer)widget)
 593     ly2 = (ly2 / 2) + (ly2 % 2);
 594
 595   lx2 += DEFAULT_DELTA;
 596
 597   if(item->subtree && item->expanded)
 598     gdk_draw_line(widget->window, widget->style->black_gc,
 599                   lx2, ly2, lx2, widget->allocation.height);
 600
 601   /* draw horizontal line */
 602   ly1 = ly2;
 603   lx2 += 2;
 604
 605   gdk_draw_line(widget->window, widget->style->black_gc,
 606                 lx1, ly1, lx2, ly2);
 607
 608   lx2 -= DEFAULT_DELTA+2;
 609   ly1 = 0;
 610   ly2 = widget->allocation.height;
 611
 612   if(tree != tree->root_tree)
 613     {
 614       item = GTK_TREE_ITEM(tree->tree_owner);
 615       tree = GTK_TREE(GTK_WIDGET(tree)->parent);
 616       while(tree != tree->root_tree) {
 617         lx1 = lx2 -= tree->indent_value;
 618
 619         if(g_list_last(tree->children)->data != (gpointer)item)
 620           gdk_draw_line(widget->window, widget->style->black_gc,
 621                         lx1, ly1, lx2, ly2);
 622         item = GTK_TREE_ITEM(tree->tree_owner);
 623         tree = GTK_TREE(GTK_WIDGET(tree)->parent);
 624       }
 625     }
 626 }
 627
 628 static void
 629 gtk_tree_item_draw (GtkWidget    *widget,
 630                     GdkRectangle *area)
 631 {
 632   GtkBin *bin;
 633   GdkRectangle child_area, item_area;
 634   GtkTreeItem* tree_item;
 635
 636   g_return_if_fail (widget != NULL);
 637   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 638   g_return_if_fail (area != NULL);
 639
 640   if (GTK_WIDGET_DRAWABLE (widget))
 641     {
 642       bin = GTK_BIN (widget);
 643       tree_item = GTK_TREE_ITEM(widget);
 644
 645       /* draw left size of tree item */
 646       item_area.x = 0; 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 (!GTK_WIDGET_IS_SENSITIVE (widget))
 654           gtk_style_set_background (widget->style, widget->window,
 655                                     GTK_STATE_INSENSITIVE);
 656         else if(GTK_TREE(widget->parent)->view_mode == GTK_TREE_VIEW_LINE &&
 657                 widget->state == GTK_STATE_SELECTED)
 658           gtk_style_set_background (widget->style, widget->window, widget->state);
 659         else
 660           gdk_window_set_background (widget->window,
 661                                      &widget->style->base[GTK_STATE_NORMAL]);
 662
 663         gdk_window_clear_area (widget->window,
 664                                child_area.x, child_area.y,
 665                                child_area.width, child_area.height);
 666
 667 /*      gtk_tree_item_draw_lines(widget); */
 668
 669         if (tree_item->pixmaps_box &&
 670             GTK_WIDGET_VISIBLE(tree_item->pixmaps_box) &&
 671             gtk_widget_intersect (tree_item->pixmaps_box, area, &child_area))
 672           gtk_widget_draw (tree_item->pixmaps_box, &child_area);
 673       }
 674
 675       /* draw right side */
 676       if(gtk_widget_intersect (bin->child, area, &child_area)) {
 677
 678         if (!GTK_WIDGET_IS_SENSITIVE (widget))
 679           gtk_style_set_background (widget->style, widget->window,
 680                                     GTK_STATE_INSENSITIVE);
 681         else if (widget->state == GTK_STATE_NORMAL)
 682           gdk_window_set_background(widget->window, &widget->style->base[GTK_STATE_NORMAL]);
 683         else
 684           gtk_style_set_background (widget->style, widget->window, widget->state);
 685
 686         gdk_window_clear_area (widget->window, child_area.x, child_area.y,
 687                                child_area.width+1, child_area.height);
 688
 689         if (bin->child &&
 690             GTK_WIDGET_VISIBLE(bin->child) &&
 691             gtk_widget_intersect (bin->child, area, &child_area))
 692           gtk_widget_draw (bin->child, &child_area);
 693       }
 694
 695       gtk_widget_draw_focus (widget);
 696     }
 697 }
 698
 699 static void
 700 gtk_tree_item_draw_focus (GtkWidget *widget)
 701 {
 702   GdkGC *gc;
 703   int dx;
 704
 705   g_return_if_fail (widget != NULL);
 706   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 707
 708   if (GTK_WIDGET_DRAWABLE (widget))
 709     {
 710       if (GTK_WIDGET_HAS_FOCUS (widget))
 711         gc = widget->style->black_gc;
 712       else if (!GTK_WIDGET_IS_SENSITIVE (widget))
 713         gc = widget->style->bg_gc[GTK_STATE_INSENSITIVE];
 714       else if (widget->state == GTK_STATE_NORMAL)
 715         gc = widget->style->base_gc[GTK_STATE_NORMAL];
 716       else
 717         gc = widget->style->bg_gc[widget->state];
 718
 719       dx = 0;
 720
 721       if(GTK_TREE(widget->parent)->view_mode == GTK_TREE_VIEW_ITEM)
 722         dx = GTK_TREE_ITEM(widget)->pixmaps_box->allocation.width + DEFAULT_DELTA +
 723           GTK_TREE(widget->parent)->current_indent+1;
 724
 725       gdk_draw_rectangle (widget->window, gc, FALSE, dx, 0,
 726                           widget->allocation.width - 1 - dx,
 727                           widget->allocation.height - 1);
 728
 729       if (GTK_TREE (widget->parent)->view_line &&
 730          (!GTK_IS_ROOT_TREE (widget->parent) ||
 731           (GTK_IS_ROOT_TREE (widget->parent) && GTK_TREE_ITEM(widget)->subtree)))
 732         {
 733           gtk_tree_item_draw_lines(widget);
 734         }
 735     }
 736 }
 737
 738 static gint
 739 gtk_tree_item_button_press (GtkWidget      *widget,
 740                             GdkEventButton *event)
 741 {
 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   if (event->type == GDK_BUTTON_PRESS
 748         && GTK_WIDGET_IS_SENSITIVE(widget)
 749         && !GTK_WIDGET_HAS_FOCUS (widget))
 750       gtk_widget_grab_focus (widget);
 751
 752   return FALSE;
 753 }
 754
 755 static gint
 756 gtk_tree_item_expose (GtkWidget      *widget,
 757                       GdkEventExpose *event)
 758 {
 759   g_return_val_if_fail (widget != NULL, FALSE);
 760   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 761   g_return_val_if_fail (event != NULL, FALSE);
 762
 763   if (GTK_WIDGET_DRAWABLE (widget))
 764     gtk_tree_item_draw(widget, &event->area);
 765
 766   return FALSE;
 767 }
 768
 769 static gint
 770 gtk_tree_item_focus_in (GtkWidget     *widget,
 771                         GdkEventFocus *event)
 772 {
 773   g_return_val_if_fail (widget != NULL, FALSE);
 774   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 775   g_return_val_if_fail (event != NULL, FALSE);
 776
 777   GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
 778   gtk_widget_draw_focus (widget);
 779
 780
 781   return FALSE;
 782 }
 783
 784 static gint
 785 gtk_tree_item_focus_out (GtkWidget     *widget,
 786                          GdkEventFocus *event)
 787 {
 788   g_return_val_if_fail (widget != NULL, FALSE);
 789   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 790   g_return_val_if_fail (event != NULL, FALSE);
 791
 792   GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
 793   gtk_widget_draw_focus (widget);
 794
 795
 796   return FALSE;
 797 }
 798
 799 static void
 800 gtk_real_tree_item_select (GtkItem *item)
 801 {
 802   g_return_if_fail (item != NULL);
 803   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 804
 805   if (GTK_WIDGET (item)->state == GTK_STATE_SELECTED
 806         || !GTK_WIDGET_IS_SENSITIVE(item))
 807     return;
 808
 809   if(GTK_TREE(GTK_WIDGET(item)->parent)->view_mode == GTK_TREE_VIEW_LINE)
 810     gtk_widget_set_state (GTK_TREE_ITEM (item)->pixmaps_box, GTK_STATE_SELECTED);
 811
 812   gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 813
 814   gtk_widget_queue_draw (GTK_WIDGET (item));
 815 }
 816
 817 static void
 818 gtk_real_tree_item_deselect (GtkItem *item)
 819 {
 820   g_return_if_fail (item != NULL);
 821   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 822
 823   if (GTK_WIDGET (item)->state == GTK_STATE_NORMAL)
 824     return;
 825
 826   if(GTK_WIDGET_MAPPED(GTK_WIDGET (item)))
 827     {
 828       gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_NORMAL);
 829
 830       if(GTK_TREE(GTK_WIDGET(item)->parent)->view_mode == GTK_TREE_VIEW_LINE)
 831         gtk_widget_set_state (GTK_TREE_ITEM (item)->pixmaps_box, GTK_STATE_NORMAL);
 832
 833       gtk_widget_queue_draw (GTK_WIDGET (item));
 834     }
 835 }
 836
 837 static void
 838 gtk_real_tree_item_toggle (GtkItem *item)
 839 {
 840   g_return_if_fail (item != NULL);
 841   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 842
 843   if(!GTK_WIDGET_IS_SENSITIVE(item))
 844     return;
 845
 846   if (GTK_WIDGET (item)->parent && GTK_IS_TREE (GTK_WIDGET (item)->parent))
 847     gtk_tree_select_child (GTK_TREE (GTK_WIDGET (item)->parent),
 848                            GTK_WIDGET (item));
 849   else
 850     {
 851       /* Should we really bother with this bit? A listitem not in a list?
 852        * -Johannes Keukelaar
 853        * yes, always be on the save side!
 854        * -timj
 855        */
 856       if (GTK_WIDGET (item)->state == GTK_STATE_SELECTED)
 857         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_NORMAL);
 858       else
 859         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 860       gtk_widget_queue_draw (GTK_WIDGET (item));
 861     }
 862 }
 863
 864 static void
 865 gtk_real_tree_item_expand (GtkTreeItem *tree_item)
 866 {
 867   GtkTree* tree;
 868
 869   g_return_if_fail (tree_item != NULL);
 870   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 871
 872   if (tree_item->subtree && !tree_item->expanded)
 873     {
 874       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 875
 876       /* hide subtree widget */
 877       gtk_widget_show (tree_item->subtree);
 878
 879       /* hide button '+' and show button '-' */
 880       if (tree_item->pixmaps_box)
 881         {
 882           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 883                                 tree_item->plus_pix_widget);
 884           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 885                              tree_item->minus_pix_widget);
 886         }
 887       if (tree->root_tree)
 888         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 889       tree_item->expanded = TRUE;
 890     }
 891 }
 892
 893 static void
 894 gtk_real_tree_item_collapse (GtkTreeItem *tree_item)
 895 {
 896   GtkTree* tree;
 897
 898   g_return_if_fail (tree_item != NULL);
 899   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 900
 901   if (tree_item->subtree && tree_item->expanded)
 902     {
 903       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 904
 905       /* hide subtree widget */
 906       gtk_widget_hide (tree_item->subtree);
 907
 908       /* hide button '-' and show button '+' */
 909       if (tree_item->pixmaps_box)
 910         {
 911           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 912                                 tree_item->minus_pix_widget);
 913           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 914                              tree_item->plus_pix_widget);
 915         }
 916       if (tree->root_tree)
 917         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 918       tree_item->expanded = FALSE;
 919     }
 920 }
 921
 922 static void
 923 gtk_tree_item_destroy (GtkObject *object)
 924 {
 925   GtkTreeItem* item;
 926   GtkWidget* child;
 927
 928   g_return_if_fail (object != NULL);
 929   g_return_if_fail (GTK_IS_TREE_ITEM (object));
 930
 931 #ifdef TREE_DEBUG
 932   g_print("+ gtk_tree_item_destroy [object %#x]\n", (int)object);
 933 #endif /* TREE_DEBUG */
 934
 935   item = GTK_TREE_ITEM(object);
 936
 937   /* free sub tree if it exist */
 938   child = item->subtree;
 939   if (child)
 940     {
 941       gtk_widget_ref (child);
 942       gtk_widget_unparent (child);
 943       gtk_widget_destroy (child);
 944       gtk_widget_unref (child);
 945       item->subtree = NULL;
 946     }
 947
 948   /* free pixmaps box */
 949   child = item->pixmaps_box;
 950   if (child)
 951     {
 952       gtk_widget_ref (child);
 953       gtk_widget_unparent (child);
 954       gtk_widget_destroy (child);
 955       gtk_widget_unref (child);
 956       item->pixmaps_box = NULL;
 957     }
 958
 959
 960   /* destroy plus pixmap */
 961   if (item->plus_pix_widget)
 962     {
 963       gtk_widget_destroy (item->plus_pix_widget);
 964       gtk_widget_unref (item->plus_pix_widget);
 965       item->plus_pix_widget = NULL;
 966     }
 967
 968   /* destroy minus pixmap */
 969   if (item->minus_pix_widget)
 970     {
 971       gtk_widget_destroy (item->minus_pix_widget);
 972       gtk_widget_unref (item->minus_pix_widget);
 973       item->minus_pix_widget = NULL;
 974     }
 975
 976   /* By removing the pixmaps here, and not in unrealize, we depend on
 977    * the fact that a widget can never change colormap or visual.
 978    */
 979   gtk_tree_item_remove_pixmaps (item);
 980
 981   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 982
 983 #ifdef TREE_DEBUG
 984   g_print("- gtk_tree_item_destroy\n");
 985 #endif /* TREE_DEBUG */
 986 }
 987
 988 void
 989 gtk_tree_item_remove_subtree (GtkTreeItem* item)
 990 {
 991   g_return_if_fail (item != NULL);
 992   g_return_if_fail (GTK_IS_TREE_ITEM(item));
 993   g_return_if_fail (item->subtree != NULL);
 994
 995   if (GTK_TREE (item->subtree)->children)
 996     gtk_tree_remove_items (GTK_TREE (item->subtree),
 997                            GTK_TREE (item->subtree)->children);
 998
 999   if (GTK_WIDGET_MAPPED (item->subtree))
1000     gtk_widget_unmap (item->subtree);
1001
1002   gtk_widget_unparent (item->subtree);
1003
1004   if (item->pixmaps_box)
1005     gtk_widget_hide (item->pixmaps_box);
1006
1007   item->subtree = NULL;
1008   item->expanded = FALSE;
1009   if (item->pixmaps_box)
1010     {
1011       gtk_container_remove (GTK_CONTAINER (item->pixmaps_box),
1012                             item->minus_pix_widget);
1013       gtk_container_add (GTK_CONTAINER (item->pixmaps_box),
1014                          item->plus_pix_widget);
1015     }
1016 }
1017
1018 static void
1019 gtk_tree_item_map (GtkWidget *widget)
1020 {
1021   GtkBin *bin;
1022   GtkTreeItem* item;
1023
1024   g_return_if_fail (widget != NULL);
1025   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
1026
1027   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
1028   bin = GTK_BIN (widget);
1029   item = GTK_TREE_ITEM(widget);
1030
1031   if (!GTK_WIDGET_NO_WINDOW (widget))
1032     gdk_window_show (widget->window);
1033   else
1034     gtk_widget_queue_draw (widget);
1035
1036   if(item->pixmaps_box &&
1037      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
1038      !GTK_WIDGET_MAPPED (item->pixmaps_box))
1039     gtk_widget_map (item->pixmaps_box);
1040
1041   if (bin->child &&
1042       GTK_WIDGET_VISIBLE (bin->child) &&
1043       !GTK_WIDGET_MAPPED (bin->child))
1044     gtk_widget_map (bin->child);
1045 }
1046
1047 static void
1048 gtk_tree_item_unmap (GtkWidget *widget)
1049 {
1050   GtkBin *bin;
1051   GtkTreeItem* item;
1052
1053   g_return_if_fail (widget != NULL);
1054   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
1055
1056   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
1057   bin = GTK_BIN (widget);
1058   item = GTK_TREE_ITEM(widget);
1059
1060   if (GTK_WIDGET_NO_WINDOW (widget))
1061     gdk_window_clear_area (widget->window,
1062                            widget->allocation.x,
1063                            widget->allocation.y,
1064                            widget->allocation.width,
1065                            widget->allocation.height);
1066   else
1067     gdk_window_hide (widget->window);
1068
1069   if(item->pixmaps_box &&
1070      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
1071      GTK_WIDGET_MAPPED (item->pixmaps_box))
1072     gtk_widget_unmap (bin->child);
1073
1074   if (bin->child &&
1075       GTK_WIDGET_VISIBLE (bin->child) &&
1076       GTK_WIDGET_MAPPED (bin->child))
1077     gtk_widget_unmap (bin->child);
1078 }