/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * gimpdockable.c
 * Copyright (C) 2001 Michael Natterer
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "config.h"

#include <gtk/gtk.h>

#include "widgets-types.h"

#include "core/gimpcontext.h"

#include "gimpdockable.h"
#include "gimpdockbook.h"


static void        gimp_dockable_class_init     (GimpDockableClass *klass);
static void        gimp_dockable_init           (GimpDockable      *dockable);

static void        gimp_dockable_destroy             (GtkObject    *object);
static void        gimp_dockable_style_set           (GtkWidget    *widget,
						      GtkStyle     *prev_style);

static GtkWidget * gimp_dockable_real_get_tab_widget (GimpDockable *dockable,
						      GimpDockbook *dockbook,
						      gint          size);
static void        gimp_dockable_real_set_context    (GimpDockable *dockable,
						      GimpContext  *context);


static GtkVBoxClass *parent_class = NULL;


GType
gimp_dockable_get_type (void)
{
  static GType dockable_type = 0;

  if (! dockable_type)
    {
      static const GtkTypeInfo dockable_info =
      {
	"GimpDockable",
	sizeof (GimpDockable),
	sizeof (GimpDockableClass),
	(GtkClassInitFunc) gimp_dockable_class_init,
	(GtkObjectInitFunc) gimp_dockable_init,
	/* reserved_1 */ NULL,
        /* reserved_2 */ NULL,
        (GtkClassInitFunc) NULL,
      };

      dockable_type = gtk_type_unique (GTK_TYPE_VBOX, &dockable_info);
    }

  return dockable_type;
}

static void
gimp_dockable_class_init (GimpDockableClass *klass)
{
  GtkObjectClass *object_class;
  GtkWidgetClass *widget_class;

  object_class = (GtkObjectClass *) klass;
  widget_class = (GtkWidgetClass *) klass;

  parent_class = g_type_class_peek_parent (klass);

  object_class->destroy   = gimp_dockable_destroy;

  widget_class->style_set = gimp_dockable_style_set;

  klass->get_tab_widget   = gimp_dockable_real_get_tab_widget;
  klass->set_context      = gimp_dockable_real_set_context;

  gtk_widget_class_install_style_property (widget_class,
                                           g_param_spec_int ("content_border",
                                                             NULL, NULL,
                                                             0,
                                                             G_MAXINT,
                                                             0,
                                                             G_PARAM_READABLE));

  gtk_widget_class_install_style_property (widget_class,
                                           g_param_spec_int ("content_spacing",
                                                             NULL, NULL,
                                                             0,
                                                             G_MAXINT,
                                                             0,
                                                             G_PARAM_READABLE));
}

static void
gimp_dockable_init (GimpDockable *dockable)
{
  dockable->name             = NULL;
  dockable->short_name       = NULL;
  dockable->dockbook         = NULL;
  dockable->context          = NULL;
  dockable->get_tab_func     = NULL;
  dockable->set_context_func = NULL;
}

static void
gimp_dockable_destroy (GtkObject *object)
{
  GimpDockable *dockable;

  dockable = GIMP_DOCKABLE (object);

  if (dockable->context)
    gimp_dockable_set_context (dockable, NULL);

  if (dockable->name)
    {
      g_free (dockable->name);
      dockable->name = NULL;
    }

  if (dockable->short_name)
    {
      g_free (dockable->short_name);
      dockable->short_name = NULL;
    }

  if (GTK_OBJECT_CLASS (parent_class))
    GTK_OBJECT_CLASS (parent_class)->destroy (object);
}

static void
gimp_dockable_style_set (GtkWidget *widget,
			 GtkStyle  *prev_style)
{
  gint content_border;
  gint content_spacing;

  gtk_widget_style_get (widget,
                        "content_border",
                        &content_border,
                        "content_spacing",
                        &content_spacing,
			NULL);

  gtk_container_set_border_width (GTK_CONTAINER (widget), content_border);
  gtk_box_set_spacing (GTK_BOX (widget), content_spacing);

  if (GTK_WIDGET_CLASS (parent_class)->style_set)
    GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style);
}

GtkWidget *
gimp_dockable_new (const gchar                *name,
		   const gchar                *short_name,
		   GimpDockableGetTabFunc      get_tab_func,
		   GimpDockableSetContextFunc  set_context_func)
{
  GimpDockable *dockable;

  g_return_val_if_fail (name != NULL, NULL);
  g_return_val_if_fail (short_name != NULL, NULL);

  dockable = gtk_type_new (GIMP_TYPE_DOCKABLE);

  dockable->name        = g_strdup (name);
  dockable->short_name  = g_strdup (short_name);

  dockable->get_tab_func     = get_tab_func;
  dockable->set_context_func = set_context_func;

  return GTK_WIDGET (dockable);
}

GtkWidget *
gimp_dockable_get_tab_widget (GimpDockable *dockable,
			      GimpDockbook *dockbook,
			      gint          size)
{
  g_return_val_if_fail (GIMP_IS_DOCKABLE (dockable), NULL);
  g_return_val_if_fail (GIMP_IS_DOCKBOOK (dockbook), NULL);
  g_return_val_if_fail (size >= -1 && size < 64, NULL);

  return GIMP_DOCKABLE_GET_CLASS (dockable)->get_tab_widget (dockable,
							     dockbook,
							     size);
}

void
gimp_dockable_set_context (GimpDockable *dockable,
			   GimpContext  *context)
{
  g_return_if_fail (GIMP_IS_DOCKABLE (dockable));
  g_return_if_fail (! context || GIMP_IS_CONTEXT (context));

  if (context != dockable->context)
    {
      GIMP_DOCKABLE_GET_CLASS (dockable)->set_context (dockable,
						       context);
    }
}

static GtkWidget *
gimp_dockable_real_get_tab_widget (GimpDockable *dockable,
				   GimpDockbook *dockbook,
				   gint          size)
{
  g_return_val_if_fail (GIMP_IS_DOCKABLE (dockable), NULL);
  g_return_val_if_fail (GIMP_IS_DOCKBOOK (dockbook), NULL);
  g_return_val_if_fail (size >= -1 && size < 64, NULL);

  if (dockable->get_tab_func)
    {
      return dockable->get_tab_func (dockable, dockbook, size);
    }

  return gtk_label_new (dockable->short_name);
}

static void
gimp_dockable_real_set_context (GimpDockable *dockable,
				GimpContext  *context)
{
  g_return_if_fail (GIMP_IS_DOCKABLE (dockable));
  g_return_if_fail (! context || GIMP_IS_CONTEXT (context));

  if (dockable->set_context_func)
    {
      dockable->set_context_func (dockable, context);
    }

  dockable->context = context;
}