/* GTK - The GIMP Toolkit

 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

 * Boston, MA 02111-1307, USA.

 */

/*

 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS

 * file for a list of people on the GTK+ Team.  See the ChangeLog

 * files for a list of changes.  These files are distributed with

 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 

 */

#undef GDK_DISABLE_DEPRECATED

#undef GTK_DISABLE_DEPRECATED

#include "config.h"

#include "gtklabel.h"

#include "gtkeventbox.h"

#include "gtkpixmap.h"

#include "gtkmain.h"

#include "gtkmarshalers.h"

#include "gtksignal.h"

#define GTK_ENABLE_BROKEN

#include "gtktree.h"

#include "gtktreeitem.h"

#include "gtkintl.h"

#include "gtkalias.h"

#include "tree_plus.xpm"

#include "tree_minus.xpm"

#define DEFAULT_DELTA 9

enum {

  COLLAPSE_TREE,

  EXPAND_TREE,

  LAST_SIGNAL

};

typedef struct _GtkTreePixmaps GtkTreePixmaps;

struct _GtkTreePixmaps {

  gint refcount;

  GdkColormap *colormap;

  GdkPixmap *pixmap_plus;

  GdkPixmap *pixmap_minus;

  GdkBitmap *mask_plus;

  GdkBitmap *mask_minus;

};

static GList *pixmaps = NULL;

static void gtk_tree_item_class_init (GtkTreeItemClass *klass);

static void gtk_tree_item_init       (GtkTreeItem      *tree_item);

static void gtk_tree_item_realize       (GtkWidget        *widget);

static void gtk_tree_item_size_request  (GtkWidget        *widget,

					 GtkRequisition   *requisition);

static void gtk_tree_item_size_allocate (GtkWidget        *widget,

					 GtkAllocation    *allocation);

static void gtk_tree_item_paint         (GtkWidget        *widget,

					 GdkRectangle     *area);

static gint gtk_tree_item_button_press  (GtkWidget        *widget,

					 GdkEventButton   *event);

static gint gtk_tree_item_expose        (GtkWidget        *widget,

					 GdkEventExpose   *event);

static void gtk_tree_item_forall        (GtkContainer    *container,

					 gboolean         include_internals,

					 GtkCallback      callback,

					 gpointer         callback_data);

static void gtk_real_tree_item_select   (GtkItem          *item);

static void gtk_real_tree_item_deselect (GtkItem          *item);

static void gtk_real_tree_item_toggle   (GtkItem          *item);

static void gtk_real_tree_item_expand   (GtkTreeItem      *item);

static void gtk_real_tree_item_collapse (GtkTreeItem      *item);

static void gtk_tree_item_destroy        (GtkObject *object);

static gint gtk_tree_item_subtree_button_click (GtkWidget *widget);

static void gtk_tree_item_subtree_button_changed_state (GtkWidget *widget);

static void gtk_tree_item_map(GtkWidget*);

static void gtk_tree_item_unmap(GtkWidget*);

static void gtk_tree_item_add_pixmaps    (GtkTreeItem       *tree_item);

static void gtk_tree_item_remove_pixmaps (GtkTreeItem       *tree_item);

static GtkItemClass *parent_class = NULL;

static guint tree_item_signals[LAST_SIGNAL] = { 0 };

GtkType

gtk_tree_item_get_type (void)

{

  static GtkType tree_item_type = 0;

  if (!tree_item_type)

    {

      static const GtkTypeInfo tree_item_info =

      {

	"GtkTreeItem",

	sizeof (GtkTreeItem),

	sizeof (GtkTreeItemClass),

	(GtkClassInitFunc) gtk_tree_item_class_init,

	(GtkObjectInitFunc) gtk_tree_item_init,

	/* reserved_1 */ NULL,

        /* reserved_2 */ NULL,

        (GtkClassInitFunc) NULL,

      };

      I_("GtkTreeItem");

      tree_item_type = gtk_type_unique (gtk_item_get_type (), &tree_item_info);

    }

  return tree_item_type;

}

static void

gtk_tree_item_class_init (GtkTreeItemClass *class)

{

  GtkObjectClass *object_class;

  GtkWidgetClass *widget_class;

  GtkContainerClass *container_class;

  GtkItemClass *item_class;

  parent_class = gtk_type_class (GTK_TYPE_ITEM);

  object_class = (GtkObjectClass*) class;

  widget_class = (GtkWidgetClass*) class;

  item_class = (GtkItemClass*) class;

  container_class = (GtkContainerClass*) class;

  object_class->destroy = gtk_tree_item_destroy;

  widget_class->realize = gtk_tree_item_realize;

  widget_class->size_request = gtk_tree_item_size_request;

  widget_class->size_allocate = gtk_tree_item_size_allocate;

  widget_class->button_press_event = gtk_tree_item_button_press;

  widget_class->expose_event = gtk_tree_item_expose;

  widget_class->map = gtk_tree_item_map;

  widget_class->unmap = gtk_tree_item_unmap;

  container_class->forall = gtk_tree_item_forall;

  item_class->select = gtk_real_tree_item_select;

  item_class->deselect = gtk_real_tree_item_deselect;

  item_class->toggle = gtk_real_tree_item_toggle;

  class->expand = gtk_real_tree_item_expand;

  class->collapse = gtk_real_tree_item_collapse;

  tree_item_signals[EXPAND_TREE] =

    gtk_signal_new (I_("expand"),

		    GTK_RUN_FIRST,

		    GTK_CLASS_TYPE (object_class),

		    GTK_SIGNAL_OFFSET (GtkTreeItemClass, expand),

		    _gtk_marshal_VOID__VOID,

		    GTK_TYPE_NONE, 0);

  tree_item_signals[COLLAPSE_TREE] =

    gtk_signal_new (I_("collapse"),

		    GTK_RUN_FIRST,

		    GTK_CLASS_TYPE (object_class),

		    GTK_SIGNAL_OFFSET (GtkTreeItemClass, collapse),

		    _gtk_marshal_VOID__VOID,

		    GTK_TYPE_NONE, 0);

}

/* callback for event box mouse event */

static gint

gtk_tree_item_subtree_button_click (GtkWidget *widget)

{

  GtkTreeItem* item;

  g_return_val_if_fail (GTK_IS_EVENT_BOX (widget), FALSE);

  item = (GtkTreeItem*) gtk_object_get_user_data (GTK_OBJECT (widget));

  if (!gtk_widget_is_sensitive (GTK_WIDGET (item)))

    return FALSE;

  if (item->expanded)

    gtk_tree_item_collapse (item);

  else

    gtk_tree_item_expand (item);

  return TRUE;

}

/* callback for event box state changed */

static void

gtk_tree_item_subtree_button_changed_state (GtkWidget *widget)

{

  g_return_if_fail (GTK_IS_EVENT_BOX (widget));

  if (gtk_widget_get_visible (widget))

    {

      if (widget->state == GTK_STATE_NORMAL)

	gdk_window_set_background (widget->window, &widget->style->base[widget->state]);

      else

	gdk_window_set_background (widget->window, &widget->style->bg[widget->state]);

      if (gtk_widget_is_drawable (widget))

	gdk_window_clear_area (widget->window, 0, 0, 

			       widget->allocation.width, widget->allocation.height);

    }

}

static void

gtk_tree_item_init (GtkTreeItem *tree_item)

{

  GtkWidget *eventbox, *pixmapwid;

  tree_item->expanded = FALSE;

  tree_item->subtree = NULL;

  gtk_widget_set_can_focus (GTK_WIDGET (tree_item), TRUE);

  /* create an event box containing one pixmaps */

  eventbox = gtk_event_box_new();

  gtk_widget_set_events (eventbox, GDK_BUTTON_PRESS_MASK);

  gtk_signal_connect(GTK_OBJECT(eventbox), "state-changed",

		     G_CALLBACK (gtk_tree_item_subtree_button_changed_state),

		     (gpointer)NULL);

  gtk_signal_connect(GTK_OBJECT(eventbox), "realize",

		     G_CALLBACK (gtk_tree_item_subtree_button_changed_state),

		     (gpointer)NULL);

  gtk_signal_connect(GTK_OBJECT(eventbox), "button-press-event",

		     G_CALLBACK (gtk_tree_item_subtree_button_click),

		     (gpointer)NULL);

  gtk_object_set_user_data(GTK_OBJECT(eventbox), tree_item);

  tree_item->pixmaps_box = eventbox;

  /* create pixmap for button '+' */

  pixmapwid = gtk_type_new (gtk_pixmap_get_type ());

  if (!tree_item->expanded) 

    gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);

  gtk_widget_show (pixmapwid);

  tree_item->plus_pix_widget = pixmapwid;

  g_object_ref_sink (tree_item->plus_pix_widget);

  /* create pixmap for button '-' */

  pixmapwid = gtk_type_new (gtk_pixmap_get_type ());

  if (tree_item->expanded) 

    gtk_container_add (GTK_CONTAINER (eventbox), pixmapwid);

  gtk_widget_show (pixmapwid);

  tree_item->minus_pix_widget = pixmapwid;

  g_object_ref_sink (tree_item->minus_pix_widget);

  gtk_widget_set_parent (eventbox, GTK_WIDGET (tree_item));

}

GtkWidget*

gtk_tree_item_new (void)

{

  GtkWidget *tree_item;

  tree_item = GTK_WIDGET (gtk_type_new (gtk_tree_item_get_type ()));

  return tree_item;

}

GtkWidget*

gtk_tree_item_new_with_label (const gchar *label)

{

  GtkWidget *tree_item;

  GtkWidget *label_widget;

  tree_item = gtk_tree_item_new ();

  label_widget = gtk_label_new (label);

  gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);

  gtk_container_add (GTK_CONTAINER (tree_item), label_widget);

  gtk_widget_show (label_widget);

  return tree_item;

}

void

gtk_tree_item_set_subtree (GtkTreeItem *tree_item,

			   GtkWidget   *subtree)

{

  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  g_return_if_fail (GTK_IS_TREE (subtree));

  if (tree_item->subtree)

    {

      g_warning("there is already a subtree for this tree item\n");

      return;

    }

  tree_item->subtree = subtree; 

  GTK_TREE (subtree)->tree_owner = GTK_WIDGET (tree_item);

  /* show subtree button */

  if (tree_item->pixmaps_box)

    gtk_widget_show (tree_item->pixmaps_box);

  if (tree_item->expanded)

    gtk_widget_show (subtree);

  else

    gtk_widget_hide (subtree);

  gtk_widget_set_parent (subtree, GTK_WIDGET (tree_item)->parent);

}

void

gtk_tree_item_select (GtkTreeItem *tree_item)

{

  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  gtk_item_select (GTK_ITEM (tree_item));

}

void

gtk_tree_item_deselect (GtkTreeItem *tree_item)

{

  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  gtk_item_deselect (GTK_ITEM (tree_item));

}

void

gtk_tree_item_expand (GtkTreeItem *tree_item)

{

  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[EXPAND_TREE], NULL);

}

void

gtk_tree_item_collapse (GtkTreeItem *tree_item)

{

  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[COLLAPSE_TREE], NULL);

}

static void

gtk_tree_item_add_pixmaps (GtkTreeItem *tree_item)

{

  GList *tmp_list;

  GdkColormap *colormap;

  GtkTreePixmaps *pixmap_node = NULL;

  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  if (tree_item->pixmaps)

    return;

  colormap = gtk_widget_get_colormap (GTK_WIDGET (tree_item));

  tmp_list = pixmaps;

  while (tmp_list)

    {

      pixmap_node = (GtkTreePixmaps *)tmp_list->data;

      if (pixmap_node->colormap == colormap)

	break;

      tmp_list = tmp_list->next;

    }

  if (tmp_list)

    {

      pixmap_node->refcount++;

      tree_item->pixmaps = tmp_list;

    }

  else

    {

      pixmap_node = g_new (GtkTreePixmaps, 1);

      pixmap_node->colormap = colormap;

      g_object_ref (colormap);

      pixmap_node->refcount = 1;

      /* create pixmaps for plus icon */

      pixmap_node->pixmap_plus = 

	gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,

				      &pixmap_node->mask_plus,

				      NULL,

				      (gchar **)tree_plus);

      /* create pixmaps for minus icon */

      pixmap_node->pixmap_minus = 

	gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,

				      &pixmap_node->mask_minus,

				      NULL,

				      (gchar **)tree_minus);

      tree_item->pixmaps = pixmaps = g_list_prepend (pixmaps, pixmap_node);

    }

  gtk_pixmap_set (GTK_PIXMAP (tree_item->plus_pix_widget), 

		  pixmap_node->pixmap_plus, pixmap_node->mask_plus);

  gtk_pixmap_set (GTK_PIXMAP (tree_item->minus_pix_widget), 

		  pixmap_node->pixmap_minus, pixmap_node->mask_minus);

}

static void

gtk_tree_item_remove_pixmaps (GtkTreeItem *tree_item)

{

  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  if (tree_item->pixmaps)

    {

      GtkTreePixmaps *pixmap_node = (GtkTreePixmaps *)tree_item->pixmaps->data;

      g_assert (pixmap_node->refcount > 0);

      if (--pixmap_node->refcount == 0)

	{

	  g_object_unref (pixmap_node->colormap);

	  g_object_unref (pixmap_node->pixmap_plus);

	  g_object_unref (pixmap_node->mask_plus);

	  g_object_unref (pixmap_node->pixmap_minus);

	  g_object_unref (pixmap_node->mask_minus);

	  pixmaps = g_list_remove_link (pixmaps, tree_item->pixmaps);

	  g_list_free_1 (tree_item->pixmaps);

	  g_free (pixmap_node);

	}

      tree_item->pixmaps = NULL;

    }

}

static void

gtk_tree_item_realize (GtkWidget *widget)

{

  GTK_WIDGET_CLASS (parent_class)->realize (widget);

  gdk_window_set_background (widget->window, 

			     &widget->style->base[GTK_STATE_NORMAL]);

  gtk_tree_item_add_pixmaps (GTK_TREE_ITEM (widget));

}

static void

gtk_tree_item_size_request (GtkWidget      *widget,

			    GtkRequisition *requisition)

{

  GtkBin *bin = GTK_BIN (widget);

  GtkTreeItem *item = GTK_TREE_ITEM (widget);

  GtkRequisition child_requisition;

  requisition->width = (GTK_CONTAINER (widget)->border_width +

			widget->style->xthickness) * 2;

  requisition->height = GTK_CONTAINER (widget)->border_width * 2;

  if (bin->child && gtk_widget_get_visible (bin->child))

    {

      GtkRequisition pix_requisition;

      gtk_widget_size_request (bin->child, &child_requisition);

      requisition->width += child_requisition.width;

      gtk_widget_size_request (item->pixmaps_box, 

			       &pix_requisition);

      requisition->width += pix_requisition.width + DEFAULT_DELTA + 

	GTK_TREE (widget->parent)->current_indent;

      requisition->height += MAX (child_requisition.height,

				  pix_requisition.height);

    }

}

static void

gtk_tree_item_size_allocate (GtkWidget     *widget,

			     GtkAllocation *allocation)

{

  GtkBin *bin = GTK_BIN (widget);

  GtkTreeItem *item = GTK_TREE_ITEM (widget);

  GtkAllocation child_allocation;

  gint border_width;

  int temp;

  widget->allocation = *allocation;

  if (gtk_widget_get_realized (widget))

    gdk_window_move_resize (widget->window,

			    allocation->x, allocation->y,

			    allocation->width, allocation->height);

  if (bin->child)

    {

      border_width = (GTK_CONTAINER (widget)->border_width +

		      widget->style->xthickness);

      child_allocation.x = border_width + GTK_TREE(widget->parent)->current_indent;

      child_allocation.y = GTK_CONTAINER (widget)->border_width;

      child_allocation.width = item->pixmaps_box->requisition.width;

      child_allocation.height = item->pixmaps_box->requisition.height;

      temp = allocation->height - child_allocation.height;

      child_allocation.y += ( temp / 2 ) + ( temp % 2 );

      gtk_widget_size_allocate (item->pixmaps_box, &child_allocation);

      child_allocation.y = GTK_CONTAINER (widget)->border_width;

      child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);

      child_allocation.x += item->pixmaps_box->requisition.width+DEFAULT_DELTA;

      child_allocation.width = 

	MAX (1, (gint)allocation->width - ((gint)child_allocation.x + border_width));

      gtk_widget_size_allocate (bin->child, &child_allocation);

    }

}

static void 

gtk_tree_item_draw_lines (GtkWidget *widget) 

{

  GtkTreeItem* item;

  GtkTree* tree;

  guint lx1, ly1, lx2, ly2;

  GdkGC* gc;

  g_return_if_fail (GTK_IS_TREE_ITEM (widget));

  item = GTK_TREE_ITEM(widget);

  tree = GTK_TREE(widget->parent);

  if (!tree->view_line)

    return;

  gc = widget->style->text_gc[GTK_STATE_NORMAL];

  /* draw vertical line */

  lx1 = item->pixmaps_box->allocation.width;

  lx1 = lx2 = ((lx1 / 2) + (lx1 % 2) + 

	       GTK_CONTAINER (widget)->border_width + 1 + tree->current_indent);

  ly1 = 0;

  ly2 = widget->allocation.height;

  if (g_list_last (tree->children)->data == widget)

    ly2 = (ly2 / 2) + (ly2 % 2);

  if (tree != tree->root_tree)

    gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);

  /* draw vertical line for subtree connecting */

  if(g_list_last(tree->children)->data != (gpointer)widget)

    ly2 = (ly2 / 2) + (ly2 % 2);

  lx2 += DEFAULT_DELTA;

  if (item->subtree && item->expanded)

    gdk_draw_line (widget->window, gc,

		   lx2, ly2, lx2, widget->allocation.height);

  /* draw horizontal line */

  ly1 = ly2;

  lx2 += 2;

  gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);

  lx2 -= DEFAULT_DELTA+2;

  ly1 = 0;

  ly2 = widget->allocation.height;

  if (tree != tree->root_tree)

    {

      item = GTK_TREE_ITEM (tree->tree_owner);

      tree = GTK_TREE (GTK_WIDGET (tree)->parent);

      while (tree != tree->root_tree)

	{

	  lx1 = lx2 -= tree->indent_value;

	  if (g_list_last (tree->children)->data != item)

	    gdk_draw_line (widget->window, gc, lx1, ly1, lx2, ly2);

	  item = GTK_TREE_ITEM (tree->tree_owner);

	  tree = GTK_TREE (GTK_WIDGET (tree)->parent);

	} 

    }

}

static void

gtk_tree_item_paint (GtkWidget    *widget,

		     GdkRectangle *area)

{

  GdkRectangle child_area, item_area;

  GtkTreeItem* tree_item;

  /* FIXME: We should honor tree->view_mode, here - I think

   * the desired effect is that when the mode is VIEW_ITEM,

   * only the subitem is drawn as selected, not the entire

   * line. (Like the way that the tree in Windows Explorer

   * works).

   */

  if (gtk_widget_is_drawable (widget))

    {

      tree_item = GTK_TREE_ITEM(widget);

      if (widget->state == GTK_STATE_NORMAL)

	{

	  gdk_window_set_back_pixmap (widget->window, NULL, TRUE);

	  gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);

	}

      else 

	{

	  if (!gtk_widget_is_sensitive (widget))

	    gtk_paint_flat_box(widget->style, widget->window,

			       widget->state, GTK_SHADOW_NONE,

			       area, widget, "treeitem",

			       0, 0, -1, -1);

	  else

	    gtk_paint_flat_box(widget->style, widget->window,

			       widget->state, GTK_SHADOW_ETCHED_OUT,

			       area, widget, "treeitem",

			       0, 0, -1, -1);

	}

      /* draw left size of tree item */

      item_area.x = 0;

      item_area.y = 0;

      item_area.width = (tree_item->pixmaps_box->allocation.width + DEFAULT_DELTA +

			 GTK_TREE (widget->parent)->current_indent + 2);

      item_area.height = widget->allocation.height;

      if (gdk_rectangle_intersect(&item_area, area, &child_area)) 

	{

	  gtk_tree_item_draw_lines(widget);

	  if (tree_item->pixmaps_box && 

	      gtk_widget_get_visible(tree_item->pixmaps_box) &&

	      gtk_widget_intersect (tree_item->pixmaps_box, area, &child_area))

            {

              gtk_widget_queue_draw_area (tree_item->pixmaps_box,

                                          child_area.x, child_area.y,

                                          child_area.width, child_area.height);

              gdk_window_process_updates (tree_item->pixmaps_box->window, TRUE);

            }

	}

      if (gtk_widget_has_focus (widget))

	gtk_paint_focus (widget->style, widget->window, gtk_widget_get_state (widget),

			 NULL, widget, "treeitem",

			 0, 0,

			 widget->allocation.width,

			 widget->allocation.height);

    }

}

static gint

gtk_tree_item_button_press (GtkWidget      *widget,

			    GdkEventButton *event)

{

  if (event->type == GDK_BUTTON_PRESS

      && gtk_widget_is_sensitive(widget)

      && !gtk_widget_has_focus (widget))

    gtk_widget_grab_focus (widget);

  return (event->type == GDK_BUTTON_PRESS && gtk_widget_is_sensitive(widget));

}

static void

gtk_tree_item_expose_child (GtkWidget *child,

                            gpointer   client_data)

{

  struct {

    GtkWidget *container;

    GdkEventExpose *event;

  } *data = client_data;

  if (gtk_widget_is_drawable (child) &&

      !gtk_widget_get_has_window (child) &&

      (child->window == data->event->window))

    {

      GdkEvent *child_event = gdk_event_new (GDK_EXPOSE);

      child_event->expose = *data->event;

      g_object_ref (child_event->expose.window);

      child_event->expose.region = gtk_widget_region_intersect (child,

								data->event->region);

      if (!gdk_region_empty (child_event->expose.region))

        {

          gdk_region_get_clipbox (child_event->expose.region, &child_event->expose.area);

          gtk_widget_send_expose (child, child_event);

	}

      gdk_event_free (child_event);

    }

}

static gint

gtk_tree_item_expose (GtkWidget      *widget,

		      GdkEventExpose *event)

{

  struct {

    GtkWidget *container;

    GdkEventExpose *event;

  } data;

  if (gtk_widget_is_drawable (widget))

    {

      gtk_tree_item_paint (widget, &event->area);

      data.container = widget;

      data.event = event;

      gtk_container_forall (GTK_CONTAINER (widget),

                            gtk_tree_item_expose_child,

                            &data);

   }

  return FALSE;

}

static void

gtk_real_tree_item_select (GtkItem *item)

{

  GtkWidget *widget;

  g_return_if_fail (GTK_IS_TREE_ITEM (item));

  widget = GTK_WIDGET (item);

  gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);

  if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)

    gtk_widget_set_state (GTK_TREE_ITEM (item)->pixmaps_box, GTK_STATE_SELECTED);

}

static void

gtk_real_tree_item_deselect (GtkItem *item)

{

  GtkTreeItem *tree_item;

  GtkWidget *widget;

  g_return_if_fail (GTK_IS_TREE_ITEM (item));

  tree_item = GTK_TREE_ITEM (item);

  widget = GTK_WIDGET (item);

  gtk_widget_set_state (widget, GTK_STATE_NORMAL);

  if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)

    gtk_widget_set_state (tree_item->pixmaps_box, GTK_STATE_NORMAL);

}

static void

gtk_real_tree_item_toggle (GtkItem *item)

{

  g_return_if_fail (GTK_IS_TREE_ITEM (item));

  if(!gtk_widget_is_sensitive(GTK_WIDGET (item)))

    return;

  if (GTK_IS_TREE (GTK_WIDGET (item)->parent))

    gtk_tree_select_child (GTK_TREE (GTK_WIDGET (item)->parent),

			   GTK_WIDGET (item));

  else

    {

      /* Should we really bother with this bit? A listitem not in a list?

       * -Johannes Keukelaar

       * yes, always be on the safe side!

       * -timj

       */

      if (GTK_WIDGET (item)->state == GTK_STATE_SELECTED)

	gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_NORMAL);

      else

	gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);

    }

}

static void

gtk_real_tree_item_expand (GtkTreeItem *tree_item)

{

  GtkTree* tree;

  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  if (tree_item->subtree && !tree_item->expanded)

    {

      tree = GTK_TREE (GTK_WIDGET (tree_item)->parent); 

      /* hide subtree widget */

      gtk_widget_show (tree_item->subtree);

      /* hide button '+' and show button '-' */

      if (tree_item->pixmaps_box)

	{

	  gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box), 

				tree_item->plus_pix_widget);

	  gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box), 

			     tree_item->minus_pix_widget);

	}

      if (tree->root_tree)

	gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));

      tree_item->expanded = TRUE;

    }

}

static void

gtk_real_tree_item_collapse (GtkTreeItem *tree_item)

{

  GtkTree* tree;

  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  if (tree_item->subtree && tree_item->expanded) 

    {

      tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);

      /* hide subtree widget */

      gtk_widget_hide (tree_item->subtree);

      /* hide button '-' and show button '+' */

      if (tree_item->pixmaps_box)

	{

	  gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box), 

				tree_item->minus_pix_widget);

	  gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box), 

			     tree_item->plus_pix_widget);

	}

      if (tree->root_tree)

	gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));

      tree_item->expanded = FALSE;

    }

}

static void

gtk_tree_item_destroy (GtkObject *object)

{

  GtkTreeItem* item = GTK_TREE_ITEM(object);

  GtkWidget* child;

#ifdef TREE_DEBUG

  g_message("+ gtk_tree_item_destroy [object %#x]\n", (int)object);

#endif /* TREE_DEBUG */

  /* free sub tree if it exist */

  child = item->subtree;

  if (child)

    {

      g_object_ref (child);

      gtk_widget_unparent (child);

      gtk_widget_destroy (child);

      g_object_unref (child);

      item->subtree = NULL;

    }

  /* free pixmaps box */

  child = item->pixmaps_box;

  if (child)

    {

      g_object_ref (child);

      gtk_widget_unparent (child);

      gtk_widget_destroy (child);

      g_object_unref (child);

      item->pixmaps_box = NULL;

    }

  /* destroy plus pixmap */

  if (item->plus_pix_widget)

    {

      gtk_widget_destroy (item->plus_pix_widget);

      g_object_unref (item->plus_pix_widget);

      item->plus_pix_widget = NULL;

    }