/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* e-reflow-model.c: a Reflow Model
*
* Authors:
* Chris Lahey <clahey@ximian.com>
*
* (C) 2001 Ximian, Inc.
*/
#include <config.h>
#include "e-reflow-model.h"
#include <gtk/gtksignal.h>
#define ERM_CLASS(e) ((EReflowModelClass *)((GtkObject *)e)->klass)
#define PARENT_TYPE gtk_object_get_type ()
#define d(x)
d(static gint depth = 0);
static GtkObjectClass *e_reflow_model_parent_class;
enum {
MODEL_CHANGED,
MODEL_ITEMS_INSERTED,
MODEL_ITEM_CHANGED,
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, int width)
{
g_return_if_fail (e_reflow_model != NULL);
g_return_if_fail (E_IS_REFLOW_MODEL (e_reflow_model));
ERM_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.
*/
int
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 ERM_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.
*/
int
e_reflow_model_height (EReflowModel *e_reflow_model, int 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 ERM_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, int 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 ERM_CLASS (e_reflow_model)->incarnate (e_reflow_model, n, parent);
}
/**
* 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
*
* Compares item n1 and item n2 to see which should come first.
*
* Returns: strcmp like semantics for the comparison value.
*/
int
e_reflow_model_compare (EReflowModel *e_reflow_model, int n1, int n2)
{
#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 ERM_CLASS (e_reflow_model)->compare (e_reflow_model, n1, n2);
}
/**
* 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, int n, GnomeCanvasItem *item)
{
g_return_if_fail (e_reflow_model != NULL);
g_return_if_fail (E_IS_REFLOW_MODEL (e_reflow_model));
ERM_CLASS (e_reflow_model)->reincarnate (e_reflow_model, n, item);
}
static void
e_reflow_model_class_init (GtkObjectClass *object_class)
{
EReflowModelClass *klass = E_REFLOW_MODEL_CLASS(object_class);
e_reflow_model_parent_class = gtk_type_class (PARENT_TYPE);
e_reflow_model_signals [MODEL_CHANGED] =
gtk_signal_new ("model_changed",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (EReflowModelClass, model_changed),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
e_reflow_model_signals [MODEL_ITEMS_INSERTED] =
gtk_signal_new ("model_items_inserted",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (EReflowModelClass, model_items_inserted),
gtk_marshal_NONE__INT_INT,
GTK_TYPE_NONE, 2, GTK_TYPE_INT, GTK_TYPE_INT);
e_reflow_model_signals [MODEL_ITEM_CHANGED] =
gtk_signal_new ("model_item_changed",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (EReflowModelClass, model_item_changed),
gtk_marshal_NONE__INT,
GTK_TYPE_NONE, 1, GTK_TYPE_INT);
gtk_object_class_add_signals (object_class, e_reflow_model_signals, LAST_SIGNAL);
klass->set_width = NULL;
klass->count = NULL;
klass->height = NULL;
klass->incarnate = NULL;
klass->reincarnate = NULL;
klass->model_changed = NULL;
klass->model_items_inserted = NULL;
klass->model_item_changed = NULL;
}
guint
e_reflow_model_get_type (void)
{
static guint type = 0;
if (!type)
{
GtkTypeInfo info =
{
"EReflowModel",
sizeof (EReflowModel),
sizeof (EReflowModelClass),
(GtkClassInitFunc) e_reflow_model_class_init,
NULL,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
type = gtk_type_unique (PARENT_TYPE, &info);
}
return type;
}
#if d(!)0
static void
print_tabs (void)
{
int 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++);
gtk_signal_emit (GTK_OBJECT (e_reflow_model),
e_reflow_model_signals [MODEL_CHANGED]);
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, int position, int 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++);
gtk_signal_emit (GTK_OBJECT (e_reflow_model),
e_reflow_model_signals [MODEL_ITEMS_INSERTED], position, count);
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, int 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++);
gtk_signal_emit (GTK_OBJECT (e_reflow_model),
e_reflow_model_signals [MODEL_ITEM_CHANGED], n);
d(depth--);
}
