Pileus Git - ~andy/gtk/blob - gtk/gtktreeitem.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "gtklabel.h"
  28 #include "gtktree.h"
  29 #include "gtktreeitem.h"
  30 #include "gtkeventbox.h"
  31 #include "gtkpixmap.h"
  32 #include "gtkmain.h"
  33 #include "gtksignal.h"
  34
  35 #include "tree_plus.xpm"
  36 #include "tree_minus.xpm"
  37
  38 #define DEFAULT_DELTA 9
  39
  40 enum {
  41   COLLAPSE_TREE,
  42   EXPAND_TREE,
  43   LAST_SIGNAL
  44 };
  45
  46 typedef struct _GtkTreePixmaps GtkTreePixmaps;
  47
  48 struct _GtkTreePixmaps {
  49   gint refcount;
  50   GdkColormap *colormap;
  51
  52   GdkPixmap *pixmap_plus;
  53   GdkPixmap *pixmap_minus;
  54   GdkBitmap *mask_plus;
  55   GdkBitmap *mask_minus;
  56 };
  57
  58 static GList *pixmaps = NULL;
  59
  60 static void gtk_tree_item_class_init (GtkTreeItemClass *klass);
  61 static void gtk_tree_item_init       (GtkTreeItem      *tree_item);
  62 static void gtk_tree_item_realize       (GtkWidget        *widget);
  63 static void gtk_tree_item_size_request  (GtkWidget        *widget,
  64                                          GtkRequisition   *requisition);
  65 static void gtk_tree_item_size_allocate (GtkWidget        *widget,
  66                                          GtkAllocation    *allocation);
  67 static void gtk_tree_item_draw_focus    (GtkWidget        *widget);
  68 static void gtk_tree_item_paint         (GtkWidget        *widget,
  69                                          GdkRectangle     *area);
  70 static gint gtk_tree_item_button_press  (GtkWidget        *widget,
  71                                          GdkEventButton   *event);
  72 static gint gtk_tree_item_expose        (GtkWidget        *widget,
  73                                          GdkEventExpose   *event);
  74 static gint gtk_tree_item_focus_in      (GtkWidget        *widget,
  75                                          GdkEventFocus    *event);
  76 static gint gtk_tree_item_focus_out     (GtkWidget        *widget,
  77                                          GdkEventFocus    *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 void 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->draw_focus = gtk_tree_item_draw_focus;
 149   widget_class->button_press_event = gtk_tree_item_button_press;
 150   widget_class->expose_event = gtk_tree_item_expose;
 151   widget_class->focus_in_event = gtk_tree_item_focus_in;
 152   widget_class->focus_out_event = gtk_tree_item_focus_out;
 153   widget_class->map = gtk_tree_item_map;
 154   widget_class->unmap = gtk_tree_item_unmap;
 155
 156   container_class->forall = gtk_tree_item_forall;
 157
 158   item_class->select = gtk_real_tree_item_select;
 159   item_class->deselect = gtk_real_tree_item_deselect;
 160   item_class->toggle = gtk_real_tree_item_toggle;
 161
 162   class->expand = gtk_real_tree_item_expand;
 163   class->collapse = gtk_real_tree_item_collapse;
 164
 165   tree_item_signals[EXPAND_TREE] =
 166     gtk_signal_new ("expand",
 167                     GTK_RUN_FIRST,
 168                     GTK_CLASS_TYPE (object_class),
 169                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, expand),
 170                     gtk_marshal_VOID__VOID,
 171                     GTK_TYPE_NONE, 0);
 172   tree_item_signals[COLLAPSE_TREE] =
 173     gtk_signal_new ("collapse",
 174                     GTK_RUN_FIRST,
 175                     GTK_CLASS_TYPE (object_class),
 176                     GTK_SIGNAL_OFFSET (GtkTreeItemClass, collapse),
 177                     gtk_marshal_VOID__VOID,
 178                     GTK_TYPE_NONE, 0);
 179 }
 180
 181 /* callback for event box mouse event */
 182 static void
 183 gtk_tree_item_subtree_button_click (GtkWidget *widget)
 184 {
 185   GtkTreeItem* item;
 186
 187   g_return_if_fail (widget != NULL);
 188   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 189
 190   item = (GtkTreeItem*) gtk_object_get_user_data (GTK_OBJECT (widget));
 191   if (!GTK_WIDGET_IS_SENSITIVE (item))
 192     return;
 193
 194   if (item->expanded)
 195     gtk_tree_item_collapse (item);
 196   else
 197     gtk_tree_item_expand (item);
 198 }
 199
 200 /* callback for event box state changed */
 201 static void
 202 gtk_tree_item_subtree_button_changed_state (GtkWidget *widget)
 203 {
 204   g_return_if_fail (widget != NULL);
 205   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 206
 207   if (GTK_WIDGET_VISIBLE (widget))
 208     {
 209
 210       if (widget->state == GTK_STATE_NORMAL)
 211         gdk_window_set_background (widget->window, &widget->style->base[widget->state]);
 212       else
 213         gdk_window_set_background (widget->window, &widget->style->bg[widget->state]);
 214
 215       if (GTK_WIDGET_DRAWABLE (widget))
 216         gdk_window_clear_area (widget->window, 0, 0,
 217                                widget->allocation.width, widget->allocation.height);
 218     }
 219 }
 220
 221 static void
 222 gtk_tree_item_init (GtkTreeItem *tree_item)
 223 {
 224   GtkWidget *eventbox, *pixmapwid;
 225
 226   g_return_if_fail (tree_item != NULL);
 227   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 228
 229   tree_item->expanded = FALSE;
 230   tree_item->subtree = NULL;
 231   GTK_WIDGET_SET_FLAGS (tree_item, GTK_CAN_FOCUS);
 232
 233   /* create an event box containing one pixmaps */
 234   eventbox = gtk_event_box_new();
 235   gtk_widget_set_events (eventbox, GDK_BUTTON_PRESS_MASK);
 236   gtk_signal_connect(GTK_OBJECT(eventbox), "state_changed",
 237                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 238                      (gpointer)NULL);
 239   gtk_signal_connect(GTK_OBJECT(eventbox), "realize",
 240                      (GtkSignalFunc)gtk_tree_item_subtree_button_changed_state,
 241                      (gpointer)NULL);
 242   gtk_signal_connect(GTK_OBJECT(eventbox), "button_press_event",
 243                      (GtkSignalFunc)gtk_tree_item_subtree_button_click,
 244                      (gpointer)NULL);
 245   gtk_object_set_user_data(GTK_OBJECT(eventbox), tree_item);
 246   tree_item->pixmaps_box = eventbox;
 247
 248   /* create pixmap for button '+' */
 249   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 250   if (!tree_item->expanded)
 251     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 252   gtk_widget_show (pixmapwid);
 253   tree_item->plus_pix_widget = pixmapwid;
 254   gtk_widget_ref (tree_item->plus_pix_widget);
 255   gtk_object_sink (GTK_OBJECT (tree_item->plus_pix_widget));
 256
 257   /* create pixmap for button '-' */
 258   pixmapwid = gtk_type_new (gtk_pixmap_get_type ());
 259   if (tree_item->expanded)
 260     gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);
 261   gtk_widget_show (pixmapwid);
 262   tree_item->minus_pix_widget = pixmapwid;
 263   gtk_widget_ref (tree_item->minus_pix_widget);
 264   gtk_object_sink (GTK_OBJECT (tree_item->minus_pix_widget));
 265
 266   gtk_widget_set_parent (eventbox, GTK_WIDGET (tree_item));
 267 }
 268
 269
 270 GtkWidget*
 271 gtk_tree_item_new (void)
 272 {
 273   GtkWidget *tree_item;
 274
 275   tree_item = GTK_WIDGET (gtk_type_new (gtk_tree_item_get_type ()));
 276
 277   return tree_item;
 278 }
 279
 280 GtkWidget*
 281 gtk_tree_item_new_with_label (const gchar *label)
 282 {
 283   GtkWidget *tree_item;
 284   GtkWidget *label_widget;
 285
 286   tree_item = gtk_tree_item_new ();
 287   label_widget = gtk_label_new (label);
 288   gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);
 289
 290   gtk_container_add (GTK_CONTAINER (tree_item), label_widget);
 291   gtk_widget_show (label_widget);
 292
 293
 294   return tree_item;
 295 }
 296
 297 void
 298 gtk_tree_item_set_subtree (GtkTreeItem *tree_item,
 299                            GtkWidget   *subtree)
 300 {
 301   g_return_if_fail (tree_item != NULL);
 302   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 303   g_return_if_fail (subtree != NULL);
 304   g_return_if_fail (GTK_IS_TREE (subtree));
 305
 306   if (tree_item->subtree)
 307     {
 308       g_warning("there is already a subtree for this tree item\n");
 309       return;
 310     }
 311
 312   tree_item->subtree = subtree;
 313   GTK_TREE (subtree)->tree_owner = GTK_WIDGET (tree_item);
 314
 315   /* show subtree button */
 316   if (tree_item->pixmaps_box)
 317     gtk_widget_show (tree_item->pixmaps_box);
 318
 319   if (tree_item->expanded)
 320     gtk_widget_show (subtree);
 321   else
 322     gtk_widget_hide (subtree);
 323
 324   gtk_widget_set_parent (subtree, GTK_WIDGET (tree_item)->parent);
 325
 326   if (GTK_WIDGET_REALIZED (subtree->parent))
 327     gtk_widget_realize (subtree);
 328
 329   if (GTK_WIDGET_VISIBLE (subtree->parent) && GTK_WIDGET_VISIBLE (subtree))
 330     {
 331       if (GTK_WIDGET_MAPPED (subtree->parent))
 332         gtk_widget_map (subtree);
 333
 334       gtk_widget_queue_resize (subtree);
 335     }
 336 }
 337
 338 void
 339 gtk_tree_item_select (GtkTreeItem *tree_item)
 340 {
 341   g_return_if_fail (tree_item != NULL);
 342   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 343
 344   gtk_item_select (GTK_ITEM (tree_item));
 345 }
 346
 347 void
 348 gtk_tree_item_deselect (GtkTreeItem *tree_item)
 349 {
 350   g_return_if_fail (tree_item != NULL);
 351   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 352
 353   gtk_item_deselect (GTK_ITEM (tree_item));
 354 }
 355
 356 void
 357 gtk_tree_item_expand (GtkTreeItem *tree_item)
 358 {
 359   g_return_if_fail (tree_item != NULL);
 360   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 361
 362   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[EXPAND_TREE], NULL);
 363 }
 364
 365 void
 366 gtk_tree_item_collapse (GtkTreeItem *tree_item)
 367 {
 368   g_return_if_fail (tree_item != NULL);
 369   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 370
 371   gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[COLLAPSE_TREE], NULL);
 372 }
 373
 374 static void
 375 gtk_tree_item_add_pixmaps (GtkTreeItem *tree_item)
 376 {
 377   GList *tmp_list;
 378   GdkColormap *colormap;
 379   GtkTreePixmaps *pixmap_node = NULL;
 380
 381   g_return_if_fail (tree_item != NULL);
 382   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 383
 384   if (tree_item->pixmaps)
 385     return;
 386
 387   colormap = gtk_widget_get_colormap (GTK_WIDGET (tree_item));
 388
 389   tmp_list = pixmaps;
 390   while (tmp_list)
 391     {
 392       pixmap_node = (GtkTreePixmaps *)tmp_list->data;
 393
 394       if (pixmap_node->colormap == colormap)
 395         break;
 396
 397       tmp_list = tmp_list->next;
 398     }
 399
 400   if (tmp_list)
 401     {
 402       pixmap_node->refcount++;
 403       tree_item->pixmaps = tmp_list;
 404     }
 405   else
 406     {
 407       pixmap_node = g_new (GtkTreePixmaps, 1);
 408
 409       pixmap_node->colormap = colormap;
 410       gdk_colormap_ref (colormap);
 411
 412       pixmap_node->refcount = 1;
 413
 414       /* create pixmaps for plus icon */
 415       pixmap_node->pixmap_plus =
 416         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 417                                       &pixmap_node->mask_plus,
 418                                       NULL,
 419                                       tree_plus);
 420
 421       /* create pixmaps for minus icon */
 422       pixmap_node->pixmap_minus =
 423         gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
 424                                       &pixmap_node->mask_minus,
 425                                       NULL,
 426                                       tree_minus);
 427
 428       tree_item->pixmaps = pixmaps = g_list_prepend (pixmaps, pixmap_node);
 429     }
 430
 431   gtk_pixmap_set (GTK_PIXMAP (tree_item->plus_pix_widget),
 432                   pixmap_node->pixmap_plus, pixmap_node->mask_plus);
 433   gtk_pixmap_set (GTK_PIXMAP (tree_item->minus_pix_widget),
 434                   pixmap_node->pixmap_minus, pixmap_node->mask_minus);
 435 }
 436
 437 static void
 438 gtk_tree_item_remove_pixmaps (GtkTreeItem *tree_item)
 439 {
 440   g_return_if_fail (tree_item != NULL);
 441   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 442
 443   if (tree_item->pixmaps)
 444     {
 445       GtkTreePixmaps *pixmap_node = (GtkTreePixmaps *)tree_item->pixmaps->data;
 446
 447       g_assert (pixmap_node->refcount > 0);
 448
 449       if (--pixmap_node->refcount == 0)
 450         {
 451           gdk_colormap_unref (pixmap_node->colormap);
 452           gdk_pixmap_unref (pixmap_node->pixmap_plus);
 453           gdk_bitmap_unref (pixmap_node->mask_plus);
 454           gdk_pixmap_unref (pixmap_node->pixmap_minus);
 455           gdk_bitmap_unref (pixmap_node->mask_minus);
 456
 457           pixmaps = g_list_remove_link (pixmaps, tree_item->pixmaps);
 458           g_list_free_1 (tree_item->pixmaps);
 459           g_free (pixmap_node);
 460         }
 461
 462       tree_item->pixmaps = NULL;
 463     }
 464 }
 465
 466 static void
 467 gtk_tree_item_realize (GtkWidget *widget)
 468 {
 469   g_return_if_fail (widget != NULL);
 470   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 471
 472   if (GTK_WIDGET_CLASS (parent_class)->realize)
 473     (* GTK_WIDGET_CLASS (parent_class)->realize) (widget);
 474
 475   gdk_window_set_background (widget->window,
 476                              &widget->style->base[GTK_STATE_NORMAL]);
 477
 478   gtk_tree_item_add_pixmaps (GTK_TREE_ITEM (widget));
 479 }
 480
 481 static void
 482 gtk_tree_item_size_request (GtkWidget      *widget,
 483                             GtkRequisition *requisition)
 484 {
 485   GtkBin *bin;
 486   GtkTreeItem* item;
 487   GtkRequisition child_requisition;
 488
 489   g_return_if_fail (widget != NULL);
 490   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 491   g_return_if_fail (requisition != NULL);
 492
 493   bin = GTK_BIN (widget);
 494   item = GTK_TREE_ITEM(widget);
 495
 496   requisition->width = (GTK_CONTAINER (widget)->border_width +
 497                         widget->style->xthickness) * 2;
 498   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 499
 500   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 501     {
 502       GtkRequisition pix_requisition;
 503
 504       gtk_widget_size_request (bin->child, &child_requisition);
 505
 506       requisition->width += child_requisition.width;
 507
 508       gtk_widget_size_request (item->pixmaps_box,
 509                                &pix_requisition);
 510       requisition->width += pix_requisition.width + DEFAULT_DELTA +
 511         GTK_TREE (widget->parent)->current_indent;
 512
 513       requisition->height += MAX (child_requisition.height,
 514                                   pix_requisition.height);
 515     }
 516 }
 517
 518 static void
 519 gtk_tree_item_size_allocate (GtkWidget     *widget,
 520                              GtkAllocation *allocation)
 521 {
 522   GtkBin *bin;
 523   GtkTreeItem* item;
 524   GtkAllocation child_allocation;
 525   gint border_width;
 526   int temp;
 527
 528   g_return_if_fail (widget != NULL);
 529   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 530   g_return_if_fail (allocation != NULL);
 531
 532   widget->allocation = *allocation;
 533   if (GTK_WIDGET_REALIZED (widget))
 534     gdk_window_move_resize (widget->window,
 535                             allocation->x, allocation->y,
 536                             allocation->width, allocation->height);
 537
 538   bin = GTK_BIN (widget);
 539   item = GTK_TREE_ITEM(widget);
 540
 541   if (bin->child)
 542     {
 543       border_width = (GTK_CONTAINER (widget)->border_width +
 544                       widget->style->xthickness);
 545
 546       child_allocation.x = border_width + GTK_TREE(widget->parent)->current_indent;
 547       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 548
 549       child_allocation.width = item->pixmaps_box->requisition.width;
 550       child_allocation.height = item->pixmaps_box->requisition.height;
 551
 552       temp = allocation->height - child_allocation.height;
 553       child_allocation.y += ( temp / 2 ) + ( temp % 2 );
 554
 555       gtk_widget_size_allocate (item->pixmaps_box, &child_allocation);
 556
 557       child_allocation.y = GTK_CONTAINER (widget)->border_width;
 558       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 559       child_allocation.x += item->pixmaps_box->requisition.width+DEFAULT_DELTA;
 560
 561       child_allocation.width =
 562         MAX (1, (gint)allocation->width - ((gint)child_allocation.x + border_width));
 563
 564       gtk_widget_size_allocate (bin->child, &child_allocation);
 565     }
 566 }
 567
 568 static void
 569 gtk_tree_item_draw_lines (GtkWidget *widget)
 570 {
 571   GtkTreeItem* item;
 572   GtkTree* tree;
 573   guint lx1, ly1, lx2, ly2;
 574
 575   g_return_if_fail (widget != NULL);
 576   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 577
 578   item = GTK_TREE_ITEM(widget);
 579   tree = GTK_TREE(widget->parent);
 580
 581   if (!tree->view_line)
 582     return;
 583
 584   /* draw vertical line */
 585   lx1 = item->pixmaps_box->allocation.width;
 586   lx1 = lx2 = ((lx1 / 2) + (lx1 % 2) +
 587                GTK_CONTAINER (widget)->border_width + 1 + tree->current_indent);
 588   ly1 = 0;
 589   ly2 = widget->allocation.height;
 590
 591   if (g_list_last (tree->children)->data == widget)
 592     ly2 = (ly2 / 2) + (ly2 % 2);
 593
 594   if (tree != tree->root_tree)
 595     gdk_draw_line (widget->window, widget->style->black_gc, lx1, ly1, lx2, ly2);
 596
 597   /* draw vertical line for subtree connecting */
 598   if(g_list_last(tree->children)->data != (gpointer)widget)
 599     ly2 = (ly2 / 2) + (ly2 % 2);
 600
 601   lx2 += DEFAULT_DELTA;
 602
 603   if (item->subtree && item->expanded)
 604     gdk_draw_line (widget->window, widget->style->black_gc,
 605                    lx2, ly2, lx2, widget->allocation.height);
 606
 607   /* draw horizontal line */
 608   ly1 = ly2;
 609   lx2 += 2;
 610
 611   gdk_draw_line (widget->window, widget->style->black_gc,
 612                  lx1, ly1, lx2, ly2);
 613
 614   lx2 -= DEFAULT_DELTA+2;
 615   ly1 = 0;
 616   ly2 = widget->allocation.height;
 617
 618   if (tree != tree->root_tree)
 619     {
 620       item = GTK_TREE_ITEM (tree->tree_owner);
 621       tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 622       while (tree != tree->root_tree)
 623         {
 624           lx1 = lx2 -= tree->indent_value;
 625
 626           if (g_list_last (tree->children)->data != item)
 627             gdk_draw_line (widget->window, widget->style->black_gc, lx1, ly1, lx2, ly2);
 628           item = GTK_TREE_ITEM (tree->tree_owner);
 629           tree = GTK_TREE (GTK_WIDGET (tree)->parent);
 630         }
 631     }
 632 }
 633
 634 static void
 635 gtk_tree_item_paint (GtkWidget    *widget,
 636                      GdkRectangle *area)
 637 {
 638   GtkBin *bin;
 639   GdkRectangle child_area, item_area;
 640   GtkTreeItem* tree_item;
 641
 642   g_return_if_fail (widget != NULL);
 643   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 644   g_return_if_fail (area != NULL);
 645
 646   /* FIXME: We should honor tree->view_mode, here - I think
 647    * the desired effect is that when the mode is VIEW_ITEM,
 648    * only the subitem is drawn as selected, not the entire
 649    * line. (Like the way that the tree in Windows Explorer
 650    * works).
 651    */
 652   if (GTK_WIDGET_DRAWABLE (widget))
 653     {
 654       bin = GTK_BIN (widget);
 655       tree_item = GTK_TREE_ITEM(widget);
 656
 657       if (widget->state == GTK_STATE_NORMAL)
 658         {
 659           gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 660           gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
 661         }
 662       else
 663         {
 664           if (!GTK_WIDGET_IS_SENSITIVE (widget))
 665             gtk_paint_flat_box(widget->style, widget->window,
 666                                widget->state, GTK_STATE_INSENSITIVE,
 667                                area, widget, "treeitem",
 668                                0, 0, -1, -1);
 669           else
 670             gtk_paint_flat_box(widget->style, widget->window,
 671                                widget->state, GTK_SHADOW_ETCHED_OUT,
 672                                area, widget, "treeitem",
 673                                0, 0, -1, -1);
 674         }
 675
 676       /* draw left size of tree item */
 677       item_area.x = 0;
 678       item_area.y = 0;
 679       item_area.width = (tree_item->pixmaps_box->allocation.width + DEFAULT_DELTA +
 680                          GTK_TREE (widget->parent)->current_indent + 2);
 681       item_area.height = widget->allocation.height;
 682
 683
 684       if (gdk_rectangle_intersect(&item_area, area, &child_area))
 685         {
 686
 687           gtk_tree_item_draw_lines(widget);
 688
 689           if (tree_item->pixmaps_box &&
 690               GTK_WIDGET_VISIBLE(tree_item->pixmaps_box) &&
 691               gtk_widget_intersect (tree_item->pixmaps_box, area, &child_area))
 692             gtk_widget_draw (tree_item->pixmaps_box, &child_area);
 693         }
 694
 695       if (GTK_WIDGET_HAS_FOCUS (widget))
 696         gtk_paint_focus (widget->style, widget->window,
 697                          NULL, widget, "treeitem",
 698                          0, 0,
 699                          widget->allocation.width - 1,
 700                          widget->allocation.height - 1);
 701
 702     }
 703 }
 704
 705 static void
 706 gtk_tree_item_draw_focus (GtkWidget *widget)
 707 {
 708   g_return_if_fail (widget != NULL);
 709   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
 710
 711   gtk_widget_draw(widget, NULL);
 712 }
 713
 714 static gint
 715 gtk_tree_item_button_press (GtkWidget      *widget,
 716                             GdkEventButton *event)
 717 {
 718
 719   g_return_val_if_fail (widget != NULL, FALSE);
 720   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 721   g_return_val_if_fail (event != NULL, FALSE);
 722
 723   if (event->type == GDK_BUTTON_PRESS
 724         && GTK_WIDGET_IS_SENSITIVE(widget)
 725         && !GTK_WIDGET_HAS_FOCUS (widget))
 726       gtk_widget_grab_focus (widget);
 727
 728   return FALSE;
 729 }
 730
 731 static gint
 732 gtk_tree_item_expose (GtkWidget      *widget,
 733                       GdkEventExpose *event)
 734 {
 735   GdkEventExpose child_event;
 736   GtkBin *bin;
 737
 738   g_return_val_if_fail (widget != NULL, FALSE);
 739   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 740   g_return_val_if_fail (event != NULL, FALSE);
 741
 742   if (GTK_WIDGET_DRAWABLE (widget))
 743     {
 744       bin = GTK_BIN (widget);
 745
 746       gtk_tree_item_paint (widget, &event->area);
 747
 748       child_event = *event;
 749       if (bin->child && GTK_WIDGET_NO_WINDOW (bin->child) &&
 750           gtk_widget_intersect (bin->child, &event->area, &child_event.area))
 751         gtk_widget_event (bin->child, (GdkEvent*) &child_event);
 752    }
 753
 754   return FALSE;
 755 }
 756
 757 static gint
 758 gtk_tree_item_focus_in (GtkWidget     *widget,
 759                         GdkEventFocus *event)
 760 {
 761   g_return_val_if_fail (widget != NULL, FALSE);
 762   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 763   g_return_val_if_fail (event != NULL, FALSE);
 764
 765   GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
 766   gtk_widget_draw_focus (widget);
 767
 768
 769   return FALSE;
 770 }
 771
 772 static gint
 773 gtk_tree_item_focus_out (GtkWidget     *widget,
 774                          GdkEventFocus *event)
 775 {
 776   g_return_val_if_fail (widget != NULL, FALSE);
 777   g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
 778   g_return_val_if_fail (event != NULL, FALSE);
 779
 780   GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
 781   gtk_widget_draw_focus (widget);
 782
 783
 784   return FALSE;
 785 }
 786
 787 static void
 788 gtk_real_tree_item_select (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 (GTK_WIDGET (item), GTK_STATE_SELECTED);
 800
 801   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 802     gtk_widget_set_state (GTK_TREE_ITEM (item)->pixmaps_box, GTK_STATE_SELECTED);
 803 }
 804
 805 static void
 806 gtk_real_tree_item_deselect (GtkItem *item)
 807 {
 808   GtkTreeItem *tree_item;
 809   GtkWidget *widget;
 810
 811   g_return_if_fail (item != NULL);
 812   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 813
 814   tree_item = GTK_TREE_ITEM (item);
 815   widget = GTK_WIDGET (item);
 816
 817   gtk_widget_set_state (widget, GTK_STATE_NORMAL);
 818
 819   if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
 820     gtk_widget_set_state (tree_item->pixmaps_box, GTK_STATE_NORMAL);
 821 }
 822
 823 static void
 824 gtk_real_tree_item_toggle (GtkItem *item)
 825 {
 826   g_return_if_fail (item != NULL);
 827   g_return_if_fail (GTK_IS_TREE_ITEM (item));
 828
 829   if(!GTK_WIDGET_IS_SENSITIVE(item))
 830     return;
 831
 832   if (GTK_WIDGET (item)->parent && GTK_IS_TREE (GTK_WIDGET (item)->parent))
 833     gtk_tree_select_child (GTK_TREE (GTK_WIDGET (item)->parent),
 834                            GTK_WIDGET (item));
 835   else
 836     {
 837       /* Should we really bother with this bit? A listitem not in a list?
 838        * -Johannes Keukelaar
 839        * yes, always be on the safe side!
 840        * -timj
 841        */
 842       if (GTK_WIDGET (item)->state == GTK_STATE_SELECTED)
 843         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_NORMAL);
 844       else
 845         gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
 846     }
 847 }
 848
 849 static void
 850 gtk_real_tree_item_expand (GtkTreeItem *tree_item)
 851 {
 852   GtkTree* tree;
 853
 854   g_return_if_fail (tree_item != NULL);
 855   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 856
 857   if (tree_item->subtree && !tree_item->expanded)
 858     {
 859       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 860
 861       /* hide subtree widget */
 862       gtk_widget_show (tree_item->subtree);
 863
 864       /* hide button '+' and show button '-' */
 865       if (tree_item->pixmaps_box)
 866         {
 867           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 868                                 tree_item->plus_pix_widget);
 869           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 870                              tree_item->minus_pix_widget);
 871         }
 872       if (tree->root_tree)
 873         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 874       tree_item->expanded = TRUE;
 875     }
 876 }
 877
 878 static void
 879 gtk_real_tree_item_collapse (GtkTreeItem *tree_item)
 880 {
 881   GtkTree* tree;
 882
 883   g_return_if_fail (tree_item != NULL);
 884   g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
 885
 886   if (tree_item->subtree && tree_item->expanded)
 887     {
 888       tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
 889
 890       /* hide subtree widget */
 891       gtk_widget_hide (tree_item->subtree);
 892
 893       /* hide button '-' and show button '+' */
 894       if (tree_item->pixmaps_box)
 895         {
 896           gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box),
 897                                 tree_item->minus_pix_widget);
 898           gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box),
 899                              tree_item->plus_pix_widget);
 900         }
 901       if (tree->root_tree)
 902         gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
 903       tree_item->expanded = FALSE;
 904     }
 905 }
 906
 907 static void
 908 gtk_tree_item_destroy (GtkObject *object)
 909 {
 910   GtkTreeItem* item;
 911   GtkWidget* child;
 912
 913   g_return_if_fail (object != NULL);
 914   g_return_if_fail (GTK_IS_TREE_ITEM (object));
 915
 916 #ifdef TREE_DEBUG
 917   g_message("+ gtk_tree_item_destroy [object %#x]\n", (int)object);
 918 #endif /* TREE_DEBUG */
 919
 920   item = GTK_TREE_ITEM(object);
 921
 922   /* free sub tree if it exist */
 923   child = item->subtree;
 924   if (child)
 925     {
 926       gtk_widget_ref (child);
 927       gtk_widget_unparent (child);
 928       gtk_widget_destroy (child);
 929       gtk_widget_unref (child);
 930       item->subtree = NULL;
 931     }
 932
 933   /* free pixmaps box */
 934   child = item->pixmaps_box;
 935   if (child)
 936     {
 937       gtk_widget_ref (child);
 938       gtk_widget_unparent (child);
 939       gtk_widget_destroy (child);
 940       gtk_widget_unref (child);
 941       item->pixmaps_box = NULL;
 942     }
 943
 944
 945   /* destroy plus pixmap */
 946   if (item->plus_pix_widget)
 947     {
 948       gtk_widget_destroy (item->plus_pix_widget);
 949       gtk_widget_unref (item->plus_pix_widget);
 950       item->plus_pix_widget = NULL;
 951     }
 952
 953   /* destroy minus pixmap */
 954   if (item->minus_pix_widget)
 955     {
 956       gtk_widget_destroy (item->minus_pix_widget);
 957       gtk_widget_unref (item->minus_pix_widget);
 958       item->minus_pix_widget = NULL;
 959     }
 960
 961   /* By removing the pixmaps here, and not in unrealize, we depend on
 962    * the fact that a widget can never change colormap or visual.
 963    */
 964   gtk_tree_item_remove_pixmaps (item);
 965
 966   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 967
 968 #ifdef TREE_DEBUG
 969   g_message("- gtk_tree_item_destroy\n");
 970 #endif /* TREE_DEBUG */
 971 }
 972
 973 void
 974 gtk_tree_item_remove_subtree (GtkTreeItem* item)
 975 {
 976   g_return_if_fail (item != NULL);
 977   g_return_if_fail (GTK_IS_TREE_ITEM(item));
 978   g_return_if_fail (item->subtree != NULL);
 979
 980   if (GTK_TREE (item->subtree)->children)
 981     {
 982       /* The following call will remove the children and call
 983        * gtk_tree_item_remove_subtree() again. So we are done.
 984        */
 985       gtk_tree_remove_items (GTK_TREE (item->subtree),
 986                              GTK_TREE (item->subtree)->children);
 987       return;
 988     }
 989
 990   if (GTK_WIDGET_MAPPED (item->subtree))
 991     gtk_widget_unmap (item->subtree);
 992
 993   gtk_widget_unparent (item->subtree);
 994
 995   if (item->pixmaps_box)
 996     gtk_widget_hide (item->pixmaps_box);
 997
 998   item->subtree = NULL;
 999
1000   if (item->expanded)
1001     {
1002       item->expanded = FALSE;
1003       if (item->pixmaps_box)
1004         {
1005           gtk_container_remove (GTK_CONTAINER (item->pixmaps_box),
1006                                 item->minus_pix_widget);
1007           gtk_container_add (GTK_CONTAINER (item->pixmaps_box),
1008                              item->plus_pix_widget);
1009         }
1010     }
1011 }
1012
1013 static void
1014 gtk_tree_item_map (GtkWidget *widget)
1015 {
1016   GtkBin *bin;
1017   GtkTreeItem* item;
1018
1019   g_return_if_fail (widget != NULL);
1020   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
1021
1022   bin = GTK_BIN (widget);
1023   item = GTK_TREE_ITEM(widget);
1024
1025   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
1026
1027   if(item->pixmaps_box &&
1028      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
1029      !GTK_WIDGET_MAPPED (item->pixmaps_box))
1030     gtk_widget_map (item->pixmaps_box);
1031
1032   if (bin->child &&
1033       GTK_WIDGET_VISIBLE (bin->child) &&
1034       !GTK_WIDGET_MAPPED (bin->child))
1035     gtk_widget_map (bin->child);
1036
1037   gdk_window_show (widget->window);
1038 }
1039
1040 static void
1041 gtk_tree_item_unmap (GtkWidget *widget)
1042 {
1043   GtkBin *bin;
1044   GtkTreeItem* item;
1045
1046   g_return_if_fail (widget != NULL);
1047   g_return_if_fail (GTK_IS_TREE_ITEM (widget));
1048
1049   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
1050   bin = GTK_BIN (widget);
1051   item = GTK_TREE_ITEM(widget);
1052
1053   gdk_window_hide (widget->window);
1054
1055   if(item->pixmaps_box &&
1056      GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
1057      GTK_WIDGET_MAPPED (item->pixmaps_box))
1058     gtk_widget_unmap (bin->child);
1059
1060   if (bin->child &&
1061       GTK_WIDGET_VISIBLE (bin->child) &&
1062       GTK_WIDGET_MAPPED (bin->child))
1063     gtk_widget_unmap (bin->child);
1064 }
1065
1066 static void
1067 gtk_tree_item_forall (GtkContainer *container,
1068                       gboolean      include_internals,
1069                       GtkCallback   callback,
1070                       gpointer      callback_data)
1071 {
1072   GtkBin *bin;
1073   GtkTreeItem *tree_item;
1074
1075   g_return_if_fail (container != NULL);
1076   g_return_if_fail (GTK_IS_TREE_ITEM (container));
1077   g_return_if_fail (callback != NULL);
1078
1079   bin = GTK_BIN (container);
1080   tree_item = GTK_TREE_ITEM (container);
1081
1082   if (bin->child)
1083     (* callback) (bin->child, callback_data);
1084   if (include_internals && tree_item->subtree)
1085     (* callback) (tree_item->subtree, callback_data);
1086 }