98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/*
|
|
Copyright (C) 2012 - Juan Ferrer Toribio
|
|
|
|
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 2.1 of the License, or (at your option) any later version.
|
|
|
|
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 this program; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA.
|
|
*/
|
|
|
|
#ifndef DB_CALC_H
|
|
#define DB_CALC_H
|
|
|
|
#include <glib-object.h>
|
|
#include <gvn/gvn-param.h>
|
|
#include "db-model.h"
|
|
|
|
#define DB_CALC_LOG_DOMAIN (g_quark_from_string ("DbCalc"))
|
|
|
|
#define DB_TYPE_CALC (db_calc_get_type ())
|
|
#define DB_CALC(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, DB_TYPE_CALC, DbCalc))
|
|
#define DB_IS_CALC(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, DB_TYPE_CALC))
|
|
#define DB_CALC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((obj), DB_TYPE_CALC, DbCalcClass))
|
|
#define DB_IS_CALC_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), DB_TYPE_CLASS))
|
|
#define DB_CALC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), DB_TYPE_CALC, DbCalcClass))
|
|
|
|
#define DB_TYPE_CALC_TYPE (db_calc_type_get_type ())
|
|
|
|
typedef struct _DbCalc DbCalc;
|
|
typedef struct _DbCalcClass DbCalcClass;
|
|
|
|
/**
|
|
* DbCalcFunc:
|
|
* @obj: a #DbCalc
|
|
* @iter: a #DbIter pointing to a row of the model
|
|
* @out: the return position for the resulting value
|
|
* @user_data: (closure): the data passed to the function
|
|
*
|
|
* The prototype of the functions used by the #DbCalc to perform operations
|
|
* on more than one column or to perform additional operations to a column,
|
|
* previously to add them to the calculations performed by the @DbCalc itself.
|
|
**/
|
|
typedef void (*DbCalcFunc) (DbCalc * obj, DbIter * iter, GValue * out, gpointer user_data);
|
|
|
|
/**
|
|
* DbCalcType:
|
|
* @DB_CALC_TYPE_SUM: sumatory of the values
|
|
* @DB_CALC_TYPE_AVG: average of the values
|
|
*
|
|
* Defines which type of operation will be performed over the column values.
|
|
**/
|
|
typedef enum
|
|
{
|
|
DB_CALC_TYPE_SUM,
|
|
DB_CALC_TYPE_AVG
|
|
}
|
|
DbCalcType;
|
|
|
|
struct _DbCalc
|
|
{
|
|
GvnParam parent;
|
|
|
|
DbModel * model;
|
|
DbCalcType type;
|
|
DbCalcFunc func;
|
|
gpointer data;
|
|
guint col;
|
|
guint count;
|
|
};
|
|
|
|
struct _DbCalcClass
|
|
{
|
|
/* <private> */
|
|
GvnParamClass klass;
|
|
};
|
|
|
|
GType db_calc_get_type ();
|
|
GType db_calc_type_get_type ();
|
|
|
|
DbCalc * db_calc_new (DbModel * model
|
|
,DbCalcType type
|
|
,gint col);
|
|
DbCalc * db_calc_new_with_func (DbModel * model
|
|
,DbCalcType type
|
|
,DbCalcFunc func
|
|
,gpointer data);
|
|
|
|
#endif
|