/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
*
* This program 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) version 3.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the program; if not, see <http://www.gnu.org/licenses/>
*
*
* Authors:
* Chris Lahey <clahey@ximian.com>
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "e-util/e-util.h"
#include "e-reflow-model.h"
G_DEFINE_TYPE (EReflowModel, e_reflow_model, G_TYPE_OBJECT)
#define d(x)
d (static gint depth = 0;)
enum {
MODEL_CHANGED,
COMPARISON_CHANGED,
MODEL_ITEMS_INSERTED,
MODEL_ITEM_CHANGED,
MODEL_ITEM_REMOVED,
LAST_SIGNAL
};
static guint e_reflow_model_signals[LAST_SIGNAL] = { 0, };
/**
* e_reflow_model_set_width:
* @e_reflow_model: The e-reflow-model to operate on
* @width: The new value for the width of each item.
*/
void
e_reflow_model_set_width (EReflowModel *e_reflow_model, gint width)
{
g_return_if_fail (e_reflow_model != NULL);
g_return_if_fail (E_IS_REFLOW_MODEL (e_reflow_model));
E_REFLOW_MODEL_GET_CLASS (e_reflow_model)->set_width (e_reflow_model, width);
}
/**
* e_reflow_model_count:
* @e_reflow_model: The e-reflow-model to operate on
*
* Returns: the number of items in the reflow model.
*/
gint
e_reflow_model_count (EReflowModel *e_reflow_model)
{
g_return_val_if_fail (e_reflow_model != NULL, 0);
g_return_val_if_fail (E_IS_REFLOW_MODEL (e_reflow_model), 0);
return E_REFLOW_MODEL_GET_CLASS (e_reflow_model)->count (e_reflow_model);
}
/**
* e_reflow_model_height:
* @e_reflow_model: The e-reflow-model to operate on
* @n: The item number to get the height of.
* @parent: The parent GnomeCanvasItem.
*
* Returns: the height of the nth item.
*/
gint
e_reflow_model_height (EReflowModel *e_reflow_model, gint n, GnomeCanvasGroup *parent)
{
g_return_val_if_fail (e_reflow_model != NULL, 0);
g_return_val_if_fail (E_IS_REFLOW_MODEL (e_reflow_model), 0);
return E_REFLOW_MODEL_GET_CLASS (e_reflow_model)->height (e_reflow_model, n, parent);
}
/**
* e_reflow_model_incarnate:
* @e_reflow_model: The e-reflow-model to operate on
* @n: The item to create.
* @parent: The parent GnomeCanvasItem to create a child of.
*
* Create a GnomeCanvasItem to represent the nth piece of data.
*
* Returns: the new GnomeCanvasItem.
*/
GnomeCanvasItem *
e_reflow_model_incarnate (EReflowModel *e_reflow_model, gint n, GnomeCanvasGroup *parent)
{
g_return_val_if_fail (e_reflow_model != NULL, NULL);
g_return_val_if_fail (E_IS_REFLOW_MODEL (e_reflow_model), NULL);
return E_REFLOW_MODEL_GET_CLASS (e_reflow_model)->incarnate (e_reflow_model, n, parent);
}
/**
* e_reflow_model_create_cmp_cache:
* @e_reflow_model: The e-reflow-model to operate on
*
* Creates a compare cache for quicker sorting. The sorting function
* may not depend on the cache, but it should benefit from it if available.
*
* Returns: Newly created GHashTable with cached compare values. This will be
* automatically freed with g_hash_table_destroy() when no longer needed.
**/
GHashTable *
e_reflow_model_create_cmp_cache (EReflowModel *e_reflow_model)
{
g_return_val_if_fail (e_reflow_model != NULL, NULL);
g_return_val_if_fail (E_IS_REFLOW_MODEL (e_reflow_model), NULL);
if (!E_REFLOW_MODEL_GET_CLASS (e_reflow_model)->create_cmp_cache)
return NULL;
return E_REFLOW_MODEL_GET_CLASS (e_reflow_model)->create_cmp_cache (e_reflow_model);
}
/**
* e_reflow_model_compare:
* @e_reflow_model: The e-reflow-model to operate on
* @n1: The first item to compare
* @n2: The second item to compare
* @cmp_cache: #GHashTable of cached compare values, created by
* e_reflow_model_create_cmp_cache(). This can be NULL, when
* caching is not available, even when @e_reflow_model defines
* the create_cmp_cache function.
*
* Compares item n1 and item n2 to see which should come first.
*
* Returns: strcmp like semantics for the comparison value.
*/
gint
e_reflow_model_compare (EReflowModel *e_reflow_model, gint n1, gint n2, GHashTable *cmp_cache)
{
#if 0
g_return_val_if_fail (e_reflow_model != NULL, 0);
g_return_val_if_fail (E_IS_REFLOW_MODEL (e_reflow_model), 0);
#endif
return E_REFLOW_MODEL_GET_CLASS (e_reflow_model)->compare (e_reflow_model, n1, n2, cmp_cache);
}
/**
* e_reflow_model_reincarnate:
* @e_reflow_model: The e-reflow-model to operate on
* @n: The item to create.
* @item: The item to reuse.
*
* Update item to represent the nth piece of data.
*/
void
e_reflow_model_reincarnate (EReflowModel *e_reflow_model, gint n, GnomeCanvasItem *item)
{
g_return_if_fail (e_reflow_model != NULL);
g_return_if_fail (E_IS_REFLOW_MODEL (e_reflow_model));
E_REFLOW_MODEL_GET_CLASS (e_reflow_model)->reincarnate (e_reflow_model, n, item);
}
static void
e_reflow_model_class_init (EReflowModelClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
e_reflow_model_signals[MODEL_CHANGED] =
g_signal_new ("model_changed",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EReflowModelClass, model_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
e_reflow_model_signals[COMPARISON_CHANGED] =
g_signal_new ("comparison_changed",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EReflowModelClass, comparison_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
e_reflow_model_signals[MODEL_ITEMS_INSERTED] =
g_signal_new ("model_items_inserted",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EReflowModelClass, model_items_inserted),
NULL, NULL,
e_marshal_NONE__INT_INT,
G_TYPE_NONE, 2, G_TYPE_INT, G_TYPE_INT);
e_reflow_model_signals[MODEL_ITEM_CHANGED] =
g_signal_new ("model_item_changed",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EReflowModelClass, model_item_changed),
NULL, NULL,
g_cclosure_marshal_VOID__INT,
G_TYPE_NONE, 1, G_TYPE_INT);
e_reflow_model_signals[MODEL_ITEM_REMOVED] =
g_signal_new ("model_item_removed",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EReflowModelClass, model_item_removed),
NULL, NULL,
g_cclosure_marshal_VOID__INT,
G_TYPE_NONE, 1, G_TYPE_INT);
klass->set_width = NULL;
klass->count = NULL;
klass->height = NULL;
klass->incarnate = NULL;
klass->reincarnate = NULL;
klass->model_changed = NULL;
klass->comparison_changed = NULL;
klass->model_items_inserted = NULL;
klass->model_item_removed = NULL;
klass->model_item_changed = NULL;
}
static void
e_reflow_model_init (EReflowModel *e_reflow_model)
{
}
#if d(!)0
static void
print_tabs (void)
{
gint i;
for (i = 0; i < depth; i++)
g_print("\t");
}
#endif
/**
* e_reflow_model_changed:
* @e_reflow_model: the reflow model to notify of the change
*
* Use this function to notify any views of this reflow model that
* the contents of the reflow model have changed. This will emit
* the signal "model_changed" on the @e_reflow_model object.
*
* It is preferable to use the e_reflow_model_item_changed() signal to
* notify of smaller changes than to invalidate the entire model, as
* the views might have ways of caching the information they render
* from the model.
*/
void
e_reflow_model_changed (EReflowModel *e_reflow_model)
{
g_return_if_fail (e_reflow_model != NULL);
g_return_if_fail (E_IS_REFLOW_MODEL (e_reflow_model));
d (print_tabs ());
d(g_print("Emitting model_changed on model 0x%p.\n", e_reflow_model));
d (depth++);
g_signal_emit (e_reflow_model,
e_reflow_model_signals[MODEL_CHANGED], 0);
d (depth--);
}
/**
* e_reflow_model_comparison_changed:
* @e_reflow_model: the reflow model to notify of the change
*
* Use this function to notify any views of this reflow model that the
* sorting has changed. The actual contents of the items hasn't, so
* there's no need to re-query the model for the heights of the
* individual items.
*/
void
e_reflow_model_comparison_changed (EReflowModel *e_reflow_model)
{
g_return_if_fail (e_reflow_model != NULL);
g_return_if_fail (E_IS_REFLOW_MODEL (e_reflow_model));
d (print_tabs ());
d(g_print("Emitting comparison_changed on model 0x%p.\n", e_reflow_model));
d (depth++);
g_signal_emit (e_reflow_model,
e_reflow_model_signals[COMPARISON_CHANGED], 0);
d (depth--);
}
/**
* e_reflow_model_items_inserted:
* @e_reflow_model: The model changed.
* @position: The position the items were insert in.
* @count: The number of items inserted.
*
* Use this function to notify any views of the reflow model that a number of items have been inserted.
**/
void
e_reflow_model_items_inserted (EReflowModel *e_reflow_model, gint position, gint count)
{
g_return_if_fail (e_reflow_model != NULL);
g_return_if_fail (E_IS_REFLOW_MODEL (e_reflow_model));
d (print_tabs ());
d(g_print("Emitting items_inserted on model 0x%p, position=%d, count=%d.\n", e_reflow_model, position, count));
d (depth++);
g_signal_emit (e_reflow_model,
e_reflow_model_signals[MODEL_ITEMS_INSERTED], 0,
position, count);
d (depth--);
}
/**
* e_reflow_model_item_removed:
* @e_reflow_model: The model changed.
* @n: The position from which the items were removed.
*
* Use this function to notify any views of the reflow model that an
* item has been removed.
**/
void
e_reflow_model_item_removed (EReflowModel *e_reflow_model,
gint n)
{
g_return_if_fail (e_reflow_model != NULL);
g_return_if_fail (E_IS_REFLOW_MODEL (e_reflow_model));
d (print_tabs ());
d(g_print("Emitting item_removed on model 0x%p, n=%d.\n", e_reflow_model, n));
d (depth++);
g_signal_emit (e_reflow_model,
e_reflow_model_signals[MODEL_ITEM_REMOVED], 0,
n);
d (depth--);
}
/**
* e_reflow_model_item_changed:
* @e_reflow_model: the reflow model to notify of the change
* @item: the item that was changed in the model.
*
* Use this function to notify any views of the reflow model that the
* contents of item @item have changed in model such that the height
* has changed or the item needs to be reincarnated. This function
* will emit the "model_item_changed" signal on the @e_reflow_model
* object
*/
void
e_reflow_model_item_changed (EReflowModel *e_reflow_model, gint n)
{
g_return_if_fail (e_reflow_model != NULL);
g_return_if_fail (E_IS_REFLOW_MODEL (e_reflow_model));
d (print_tabs ());
d(g_print("Emitting item_changed on model 0x%p, n=%d.\n", e_reflow_model, n));
d (depth++);
g_signal_emit (e_reflow_model,
e_reflow_model_signals[MODEL_ITEM_CHANGED], 0,
n);
d (depth--);
}
