/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* e-table-memory-callbacks.c
* Copyright 2000, 2001, Ximian, Inc.
*
* Authors:
* Chris Lahey <clahey@ximian.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License, version 2, as published by the Free Software Foundation.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <config.h>
#include "e-util/e-util.h"
#include "e-table-memory-callbacks.h"
G_DEFINE_TYPE (ETableMemoryCalbacks, e_table_memory_callbacks, E_TABLE_MEMORY_TYPE)
static int
etmc_column_count (ETableModel *etm)
{
ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm);
if (etmc->col_count)
return etmc->col_count (etm, etmc->data);
else
return 0;
}
static void *
etmc_value_at (ETableModel *etm, int col, int row)
{
ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm);
if (etmc->value_at)
return etmc->value_at (etm, col, row, etmc->data);
else
return NULL;
}
static void
etmc_set_value_at (ETableModel *etm, int col, int row, const void *val)
{
ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm);
if (etmc->set_value_at)
etmc->set_value_at (etm, col, row, val, etmc->data);
}
static gboolean
etmc_is_cell_editable (ETableModel *etm, int col, int row)
{
ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm);
if (etmc->is_cell_editable)
return etmc->is_cell_editable (etm, col, row, etmc->data);
else
return FALSE;
}
/* The default for etmc_duplicate_value is to return the raw value. */
static void *
etmc_duplicate_value (ETableModel *etm, int col, const void *value)
{
ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm);
if (etmc->duplicate_value)
return etmc->duplicate_value (etm, col, value, etmc->data);
else
return (void *)value;
}
static void
etmc_free_value (ETableModel *etm, int col, void *value)
{
ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm);
if (etmc->free_value)
etmc->free_value (etm, col, value, etmc->data);
}
static void *
etmc_initialize_value (ETableModel *etm, int col)
{
ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm);
if (etmc->initialize_value)
return etmc->initialize_value (etm, col, etmc->data);
else
return NULL;
}
static gboolean
etmc_value_is_empty (ETableModel *etm, int col, const void *value)
{
ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm);
if (etmc->value_is_empty)
return etmc->value_is_empty (etm, col, value, etmc->data);
else
return FALSE;
}
static char *
etmc_value_to_string (ETableModel *etm, int col, const void *value)
{
ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm);
if (etmc->value_to_string)
return etmc->value_to_string (etm, col, value, etmc->data);
else
return g_strdup ("");
}
static void
etmc_append_row (ETableModel *etm, ETableModel *source, int row)
{
ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm);
if (etmc->append_row)
etmc->append_row (etm, source, row, etmc->data);
}
static void
e_table_memory_callbacks_class_init (ETableMemoryCalbacksClass *klass)
{
ETableModelClass *model_class = E_TABLE_MODEL_CLASS (klass);
model_class->column_count = etmc_column_count;
model_class->value_at = etmc_value_at;
model_class->set_value_at = etmc_set_value_at;
model_class->is_cell_editable = etmc_is_cell_editable;
model_class->duplicate_value = etmc_duplicate_value;
model_class->free_value = etmc_free_value;
model_class->initialize_value = etmc_initialize_value;
model_class->value_is_empty = etmc_value_is_empty;
model_class->value_to_string = etmc_value_to_string;
model_class->append_row = etmc_append_row;
}
static void
e_table_memory_callbacks_init (ETableMemoryCalbacks *etmc)
{
/* nothing to do */
}
/**
* e_table_memory_callbacks_new:
* @col_count:
* @value_at:
* @set_value_at:
* @is_cell_editable:
* @duplicate_value:
* @free_value:
* @initialize_value:
* @value_is_empty:
* @value_to_string:
* @data: closure pointer.
*
* This initializes a new ETableMemoryCalbacksModel object. ETableMemoryCalbacksModel is
* an implementaiton of the abstract class ETableModel. The ETableMemoryCalbacksModel
* is designed to allow people to easily create ETableModels without having
* to create a new GtkType derived from ETableModel every time they need one.
*
* Instead, ETableMemoryCalbacksModel uses a setup based in callback functions, every
* callback function signature mimics the signature of each ETableModel method
* and passes the extra @data pointer to each one of the method to provide them
* with any context they might want to use.
*
* Returns: An ETableMemoryCalbacksModel object (which is also an ETableModel
* object).
*/
ETableModel *
e_table_memory_callbacks_new (ETableMemoryCalbacksColumnCountFn col_count,
ETableMemoryCalbacksValueAtFn value_at,
ETableMemoryCalbacksSetValueAtFn set_value_at,
ETableMemoryCalbacksIsCellEditableFn is_cell_editable,
ETableMemoryCalbacksDuplicateValueFn duplicate_value,
ETableMemoryCalbacksFreeValueFn free_value,
ETableMemoryCalbacksInitializeValueFn initialize_value,
ETableMemoryCalbacksValueIsEmptyFn value_is_empty,
ETableMemoryCalbacksValueToStringFn value_to_string,
void *data)
{
ETableMemoryCalbacks *et;
et = g_object_new (E_TABLE_MEMORY_CALLBACKS_TYPE, NULL);
et->col_count = col_count;
et->value_at = value_at;
et->set_value_at = set_value_at;
et->is_cell_editable = is_cell_editable;
et->duplicate_value = duplicate_value;
et->free_value = free_value;
et->initialize_value = initialize_value;
et->value_is_empty = value_is_empty;
et->value_to_string = value_to_string;
et->data = data;
return (ETableModel *) et;
}
