gtk2/gtk/gtkextendedlayout.c

/* gtkextendedlayout.c
 * Copyright (C) 2007 Openismus GmbH
 *
 * Author:
 *      Mathias Hasselmann <mathias@openismus.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library 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.
 */


#include <config.h>
#include "gtkextendedlayout.h"
#include "gtkintl.h"
#include "gtkalias.h"

GType
gtk_extended_layout_get_type (void)
{
  static GType extended_layout_type = 0;

  if (G_UNLIKELY(!extended_layout_type))
    extended_layout_type =
      g_type_register_static_simple (G_TYPE_INTERFACE, I_("GtkExtendedLayout"),
                                     sizeof (GtkExtendedLayoutIface),
                                     NULL, 0, NULL, 0);

  return extended_layout_type;
}

/**
 * gtk_extended_layout_get_desired_size:
 * @layout: a #GtkExtendedLayout instance
 * @minimum_size: location for storing the minimum size, or %NULL
 * @natural_size: location for storing the preferred size, or %NULL
 *
 * Retreives an extended layout item's desired size.
 *
 * Since: 2.20
 */
void
gtk_extended_layout_get_desired_size (GtkExtendedLayout *layout,
                                      GtkRequisition    *minimum_size,
                                      GtkRequisition    *natural_size)
{
  GtkExtendedLayoutIface *iface;

  g_return_if_fail (GTK_IS_EXTENDED_LAYOUT (layout));
  g_return_if_fail (NULL != minimum_size || NULL != natural_size);

  iface = GTK_EXTENDED_LAYOUT_GET_IFACE (layout);
  iface->get_desired_size (layout, minimum_size, natural_size);
}

/**
 * gtk_extended_layout_get_width_for_height:
 * @layout: a #GtkExtendedLayout instance
 * @height: the size which is available for allocation
 * @minimum_size: location for storing the minimum size, or %NULL
 * @natural_size: location for storing the preferred size, or %NULL
 *
 * Retreives an extended layout item's desired width if it would given
 * the size specified in @height.
 *
 * Since: 2.20
 */
void
gtk_extended_layout_get_width_for_height (GtkExtendedLayout *layout,
                                          gint               height,
                                          gint              *minimum_width,
                                          gint              *natural_width)
{
  GtkExtendedLayoutIface *iface;

  g_return_if_fail (GTK_IS_EXTENDED_LAYOUT (layout));
  iface = GTK_EXTENDED_LAYOUT_GET_IFACE (layout);

  if (iface->get_width_for_height)
    iface->get_width_for_height (layout, height, minimum_width, natural_width);
  else
    {
      GtkRequisition minimum_size;
      GtkRequisition natural_size;

      iface->get_desired_size (layout, &minimum_size, &natural_size);

      if (minimum_width)
        *minimum_width = minimum_size.width;
      if (natural_width)
        *natural_width = natural_size.width;
    }
}

/**
 * gtk_extended_layout_get_height_for_width:
 * @layout: a #GtkExtendedLayout instance
 * @width: the size which is available for allocation
 * @minimum_size: location for storing the minimum size, or %NULL
 * @natural_size: location for storing the preferred size, or %NULL
 *
 * Retreives an extended layout item's desired height if it would given
 * the size specified in @width.
 *
 * Since: 2.20
 */
void
gtk_extended_layout_get_height_for_width (GtkExtendedLayout *layout,
                                          gint               width,
                                          gint              *minimum_height,
                                          gint              *natural_height)
{
  GtkExtendedLayoutIface *iface;

  g_return_if_fail (GTK_IS_EXTENDED_LAYOUT (layout));
  iface = GTK_EXTENDED_LAYOUT_GET_IFACE (layout);

  if (iface->get_height_for_width)
    iface->get_height_for_width (layout, width, minimum_height, natural_height);
  else
    {
      GtkRequisition minimum_size;
      GtkRequisition natural_size;

      iface->get_desired_size (layout, &minimum_size, &natural_size);

      if (minimum_height)
        *minimum_height = minimum_size.height;
      if (natural_height)
        *natural_height = natural_size.height;
    }
}

#define __GTK_EXTENDED_LAYOUT_C__
#include "gtkaliasdef.c"