atktable.c

linux下图形库开发包atk-1.4.0.tar.gz

/* ATK -  Accessibility Toolkit
 * Copyright 2001 Sun Microsystems Inc.
 *
 * 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.
 */

#include "atktable.h"
#include "atkmarshal.h"

enum {
  ROW_INSERTED,
  ROW_DELETED,
  COLUMN_INSERTED,
  COLUMN_DELETED,
  ROW_REORDERED,
  COLUMN_REORDERED,
  MODEL_CHANGED,
  LAST_SIGNAL
};

static void  atk_table_base_init (gpointer *g_class);

static guint atk_table_signals[LAST_SIGNAL] = { 0 };

GType
atk_table_get_type (void)
{
  static GType type = 0;
  
  if (!type) {
    GTypeInfo tinfo =
    {
      sizeof (AtkTableIface),
      (GBaseInitFunc) atk_table_base_init,
      (GBaseFinalizeFunc) NULL,
      
    };
    
    type = g_type_register_static (G_TYPE_INTERFACE, "AtkTable", &tinfo, 0);
  }
  
  return type;
}


static void
atk_table_base_init (gpointer *g_class)
{
  static gboolean initialized = FALSE;
  
  if (!initialized)
    {
      atk_table_signals[ROW_INSERTED] =
	g_signal_new ("row_inserted",
		      ATK_TYPE_TABLE,
		      G_SIGNAL_RUN_LAST,
		      G_STRUCT_OFFSET (AtkTableIface, row_inserted),
		      (GSignalAccumulator) NULL, NULL,
		      atk_marshal_VOID__INT_INT,
		      G_TYPE_NONE,
		      2, G_TYPE_INT, G_TYPE_INT);
      atk_table_signals[COLUMN_INSERTED] =
	g_signal_new ("column_inserted",
		      ATK_TYPE_TABLE,
		      G_SIGNAL_RUN_LAST,
		      G_STRUCT_OFFSET (AtkTableIface, column_inserted),
		      (GSignalAccumulator) NULL, NULL,
		      atk_marshal_VOID__INT_INT,
		      G_TYPE_NONE,
		      2, G_TYPE_INT, G_TYPE_INT);
      atk_table_signals[ROW_DELETED] =
	g_signal_new ("row_deleted",
		      ATK_TYPE_TABLE,
		      G_SIGNAL_RUN_LAST,
		      G_STRUCT_OFFSET (AtkTableIface, row_deleted),
		      (GSignalAccumulator) NULL, NULL,
		      atk_marshal_VOID__INT_INT,
		      G_TYPE_NONE,
		      2, G_TYPE_INT, G_TYPE_INT);
      atk_table_signals[COLUMN_DELETED] =
	g_signal_new ("column_deleted",
		      ATK_TYPE_TABLE,
		      G_SIGNAL_RUN_LAST,
		      G_STRUCT_OFFSET (AtkTableIface, column_deleted),
		      (GSignalAccumulator) NULL, NULL,
		      atk_marshal_VOID__INT_INT,
		      G_TYPE_NONE,
		      2, G_TYPE_INT, G_TYPE_INT);
      atk_table_signals[ROW_REORDERED] =
	g_signal_new ("row_reordered",
		      ATK_TYPE_TABLE,
		      G_SIGNAL_RUN_LAST,
		      G_STRUCT_OFFSET (AtkTableIface, row_reordered),
		      (GSignalAccumulator) NULL, NULL,
		      g_cclosure_marshal_VOID__VOID,
		      G_TYPE_NONE,
		      0);
      atk_table_signals[COLUMN_REORDERED] =
	g_signal_new ("column_reordered",
		      ATK_TYPE_TABLE,
		      G_SIGNAL_RUN_LAST,
		      G_STRUCT_OFFSET (AtkTableIface, column_reordered),
		      (GSignalAccumulator) NULL, NULL,
		      g_cclosure_marshal_VOID__VOID,
		      G_TYPE_NONE,
		      0);
      atk_table_signals[MODEL_CHANGED] =
        g_signal_new ("model_changed",
                      ATK_TYPE_TABLE,
                      G_SIGNAL_RUN_LAST,
                      G_STRUCT_OFFSET (AtkTableIface, model_changed),
                      (GSignalAccumulator) NULL, NULL,
                      g_cclosure_marshal_VOID__VOID,
                      G_TYPE_NONE, 0);

      initialized = TRUE;
    }
}

/**
 * atk_table_ref_at:
 * @table: a GObject instance that implements AtkTableIface
 * @row: a #gint representing a row in @table
 * @column: a #gint representing a column in @table
 *
 * Get a reference to the table cell at @row, @column.
 *
 * Returns: a AtkObject* representing the referred to accessible
 **/
AtkObject*
atk_table_ref_at (AtkTable *table,
                  gint     row,
                  gint     column)
{
  AtkTableIface *iface;

  g_return_val_if_fail (ATK_IS_TABLE (table), NULL);
  g_return_val_if_fail (row >= 0, NULL);
  g_return_val_if_fail (column >= 0, NULL);

  iface = ATK_TABLE_GET_IFACE (table);

  if (iface->ref_at)
    return (iface->ref_at) (table, row, column);
  else
    return NULL;
}

/**
 * atk_table_get_index_at:
 * @table: a GObject instance that implements AtkTableIface
 * @row: a #gint representing a row in @table
 * @column: a #gint representing a column in @table
 *
 * Gets a #gint representing the index at the specified @row and @column.
 * The value -1 is returned if the object at row,column is not a child
 * of table or table does not implement this interface.
 *
 * Returns: a #gint representing the index at specified position 
 **/
gint
atk_table_get_index_at (AtkTable *table,
                        gint     row,
                        gint     column)
{
  AtkTableIface *iface;

  g_return_val_if_fail (ATK_IS_TABLE (table), -1);
  g_return_val_if_fail (row >= 0, -1);
  g_return_val_if_fail (column >= 0, -1);

  iface = ATK_TABLE_GET_IFACE (table);

  if (iface->get_index_at)
    return (iface->get_index_at) (table, row, column);
  else
    return -1;
}

/**
 * atk_table_get_row_at_index:
 * @table: a GObject instance that implements AtkTableInterface
 * @index_: a #gint representing an index in @table
 *
 * Gets a #gint representing the row at the specified @index_, or -1
 * if the table does not implement this interface
 *
 * Returns: a gint representing the row at the specified index.
 **/
gint
atk_table_get_row_at_index (AtkTable *table,
                            gint     index)
{
  AtkTableIface *iface;

  g_return_val_if_fail (ATK_IS_TABLE (table), -1);

  iface = ATK_TABLE_GET_IFACE (table);

  if (iface->get_row_at_index)
    return (iface->get_row_at_index) (table, index);
  else
    return -1;
}

/**
 * atk_table_get_column_at_index:
 * @table: a GObject instance that implements AtkTableInterface
 * @index_: a #gint representing an index in @table
 *
 * Gets a #gint representing the column at the specified @index_, or -1
 * if the table does not implement this interface
 *
 * Returns: a gint representing the column at the specified index.
 **/
gint
atk_table_get_column_at_index (AtkTable *table,
                               gint     index)
{
  AtkTableIface *iface;

  g_return_val_if_fail (ATK_IS_TABLE (table), 0);

  iface = ATK_TABLE_GET_IFACE (table);

  if (iface->get_column_at_index)
    return (iface->get_column_at_index) (table, index);
  else
    return -1;
}

/**
 * atk_table_get_caption:
 * @table: a GObject instance that implements AtkTableInterface
 *
 * Gets the caption for the @table.
 *
 * Returns: a AtkObject* representing the table caption, or %NULL
 * if value does not implement this interface.
 **/
AtkObject*
atk_table_get_caption (AtkTable *table)
{
  AtkTableIface *iface;

  g_return_val_if_fail (ATK_IS_TABLE (table), NULL);

  iface = ATK_TABLE_GET_IFACE (table);

  if (iface->get_caption)
    return (iface->get_caption) (table);
  else
    return NULL;
}

/**
 * atk_table_get_n_columns:
 * @table: a GObject instance that implements AtkTableIface
 *
 * Gets the number of columns in the table.
 *
 * Returns: a gint representing the number of columns, or 0
 * if value does not implement this interface.
 **/
gint
atk_table_get_n_columns (AtkTable *table)
{
  AtkTableIface *iface;

  g_return_val_if_fail (ATK_IS_TABLE (table), 0);

  iface = ATK_TABLE_GET_IFACE (table);

  if (iface->get_n_columns)
    return (iface->get_n_columns) (table);
  else
    return 0;
}

/**
 * atk_table_get_column_description:
 * @table: a GObject instance that implements AtkTableIface
 * @column: a #gint representing a column in @table
 *
 * Gets the description text of the specified @column in the table
 *
 * Returns: a gchar* representing the column description, or %NULL
 * if value does not implement this interface.
 **/
G_CONST_RETURN gchar*
atk_table_get_column_description (AtkTable *table,
                                  gint     column)
{
  AtkTableIface *iface;

  g_return_val_if_fail (ATK_IS_TABLE (table), NULL);

  iface = ATK_TABLE_GET_IFACE (table);

  if (iface->get_column_description)
    return (iface->get_column_description) (table, column);
  else
    return NULL;
}

/**
 * atk_table_get_column_extent_at:
 * @table: a GObject instance that implements AtkTableIface
 * @row: a #gint representing a row in @table
 * @column: a #gint representing a column in @table
 *
 * Gets the number of columns occupied by the accessible object
 * at the specified @row and @column in the @table.
 *
 * Returns: a gint representing the column extent at specified position, or 0
 * if value does not implement this interface.
 **/
gint
atk_table_get_column_extent_at (AtkTable *table,
                                gint     row,
                                gint     column)
{
  AtkTableIface *iface;

  g_return_val_if_fail (ATK_IS_TABLE (table), 0);

  iface = ATK_TABLE_GET_IFACE (table);

  if (iface->get_column_extent_at)
    return (iface->get_column_extent_at) (table, row, column);
  else
    return 0;
}

/**
 * atk_table_get_column_header:
 * @table: a GObject instance that implements AtkTableIface
 * @column: a #gint representing a column in the table
 *
 * Gets the column header of a specified column in an accessible table.
 *
 * Returns: a AtkObject* representing the specified column header, or
 * %NULL if value does not implement this interface.
 **/
AtkObject*
atk_table_get_column_header (AtkTable *table, gint column)
{
  AtkTableIface *iface;

  g_return_val_if_fail (ATK_IS_TABLE (table), NULL);

  iface = ATK_TABLE_GET_IFACE (table);

  if (iface->get_column_header)
    return (iface->get_column_header) (table, column);
  else
    return NULL;
}

/**
 * atk_table_get_n_rows:
 * @table: a GObject instance that implements AtkTableIface
 *
 * Gets the number of rows in the table.
 *
 * Returns: a gint representing the number of rows, or 0
 * if value does not implement this interface.
 **/
gint
atk_table_get_n_rows (AtkTable *table)
{
  AtkTableIface *iface;

  g_return_val_if_fail (ATK_IS_TABLE (table), 0);

  iface = ATK_TABLE_GET_IFACE (table);

  if (iface->get_n_rows)
    return (iface->get_n_rows) (table);
  else
    return 0;
}

/**
 * atk_table_get_row_description:
 * @table: a GObject instance that implements AtkTableIface
 * @row: a #gint representing a row in @table
 *
 * Gets the description text of the specified row in the table
 *
 * Returns: a gchar* representing the row description, or %NULL
 * if value does not implement this interface.
 **/
G_CONST_RETURN gchar*
atk_table_get_row_description (AtkTable *table,
                               gint      row)
{
  AtkTableIface *iface;

  g_return_val_if_fail (ATK_IS_TABLE (table), NULL);

  iface = ATK_TABLE_GET_IFACE (table);

  if (iface->get_row_description)
    return (iface->get_row_description) (table, row);
  else
    return NULL;
}

/**
 * atk_table_get_row_extent_at:
 * @table: a GObject instance that implements AtkTableIface
 * @row: a #gint representing a row in @table
 * @column: a #gint representing a column in @table
 *
 * Gets the number of rows occupied by the accessible object
 * at a specified @row and @column in the @table.
 *
 * Returns: a gint representing the row extent at specified position, or 0
 * if value does not implement this interface.
 **/
gint
atk_table_get_row_extent_at (AtkTable *table,
                             gint     row,