271 lines
7.0 KiB
C
271 lines
7.0 KiB
C
/*
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* Copyright (C) 2012 - Juan Ferrer Toribio
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "db-param.h"
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/**
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* SECTION: db-param
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* @Short_description: representation of the value of a field
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* @Title: DbParam
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*
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* This class represents the value of a field in a #DbIterator.
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**/
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G_DEFINE_TYPE (DbParam, db_param, GVN_TYPE_PARAM);
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/**
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* db_param_new:
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* @column_name: col name of #DbModel associated to param.
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*
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* Creates a new #DbParam.
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*
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* Return value: the new #DbParam
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**/
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GvnParam * db_param_new (const gchar * column_name)
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{
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return g_object_new (DB_TYPE_PARAM, "column-name", column_name, NULL);
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}
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/**
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* db_param_new_with_index:
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* @column_index: col index of #DbModel associated to param.
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*
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* Creates a new #DbParam.
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*
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* Return value: the new #DbParam
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**/
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GvnParam * db_param_new_with_index (guint column_index)
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{
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return g_object_new (DB_TYPE_PARAM, "column-index", column_index, NULL);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Private
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static void db_param_on_value_changed (DbParam * obj, const GValue * value, gpointer data)
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{
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db_iterator_set_value (obj->iterator, obj->column_index, value, NULL);
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}
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static void db_param_on_iterator_status_changed (DbIterator * iterator, gboolean ready, DbParam * obj)
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{
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GvnParamClass * klass = GVN_PARAM_GET_CLASS (obj);
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if (ready)
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{
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if (obj->column_name)
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obj->column_index = db_iterator_get_column_index (obj->iterator, obj->column_name);
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klass->set_spec (GVN_PARAM (obj),
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db_iterator_get_spec (obj->iterator, obj->column_index));
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}
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}
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static void db_param_on_iterator_iter_changed (DbIterator * iterator, DbParam * obj)
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{
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const GValue * value;
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GvnParamClass * klass = GVN_PARAM_GET_CLASS (obj);
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if (db_iterator_get_row (obj->iterator) != -1 && obj->column_index != -1)
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{
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klass->set_status (GVN_PARAM (obj), GVN_PARAM_STATUS_OK);
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value = db_iterator_get_value (obj->iterator, obj->column_index);
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}
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else
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{
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klass->set_status (GVN_PARAM (obj), GVN_PARAM_STATUS_BUSY);
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value = NULL;
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}
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g_signal_handlers_block_by_func (obj, db_param_on_value_changed, NULL);
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if (!value)
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{
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GValue tmp_value = G_VALUE_INIT;
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g_value_init (&tmp_value, GVN_TYPE_NULL);
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klass->put_value (GVN_PARAM (obj), &tmp_value);
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g_value_unset (&tmp_value);
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}
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else
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klass->put_value (GVN_PARAM (obj), value);
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g_signal_handlers_unblock_by_func (obj, db_param_on_value_changed, NULL);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Public
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/**
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* db_param_get_column_index:
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* @obj: a #DbParam
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*
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* Gets the iterator column referenced by the param.
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*
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* Return value: the column index.
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**/
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guint db_param_get_column_index (DbParam * obj)
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{
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g_return_val_if_fail (DB_IS_PARAM (obj), 0);
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return obj->column_index;
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}
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/**
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* db_param_get_column_name:
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* @obj: a #DbParam
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*
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* Gets the iterator column referenced by the param.
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*
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* Return value: the column name.
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**/
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const gchar * db_param_get_column_name (DbParam * obj)
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{
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g_return_val_if_fail (DB_IS_PARAM (obj), 0);
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return obj->column_name;
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}
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/**
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* db_param_set_iterator:
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* @obj: a #DbParam
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* @iterator: the #DbIterator
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*
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* Sets the iterator that updates the param value, this property can be set if
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* the parameter does not have a iterator associated yet.
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**/
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void db_param_set_iterator (DbParam * obj, DbIterator * iterator)
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{
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g_return_if_fail (DB_IS_PARAM (obj));
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g_return_if_fail (DB_IS_ITERATOR (iterator));
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g_return_if_fail (!obj->iterator);
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obj->iterator = g_object_ref (iterator);
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g_object_connect (iterator
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,"signal::iter-changed", db_param_on_iterator_iter_changed, obj
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,"signal::status-changed", db_param_on_iterator_status_changed, obj
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,NULL
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);
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db_param_on_iterator_status_changed (obj->iterator,
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db_iterator_is_ready (iterator), obj);
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db_param_on_iterator_iter_changed (obj->iterator, obj);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Properties
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enum
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{
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PROP_ITERATOR = 1
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,PROP_COLUMN_INDEX
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,PROP_COLUMN_NAME
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};
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static void db_param_set_property (DbParam * obj, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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switch (property_id)
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{
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case PROP_ITERATOR:
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db_param_set_iterator (obj, g_value_get_object (value));
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break;
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case PROP_COLUMN_INDEX:
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obj->column_index = g_value_get_int (value);
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break;
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case PROP_COLUMN_NAME:
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g_free (obj->column_name);
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obj->column_name = g_value_dup_string (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, property_id, pspec);
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}
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}
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static void db_param_get_property (DbParam * obj, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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switch (property_id)
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{
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case PROP_ITERATOR:
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g_value_set_object (value, obj->iterator);
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break;
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case PROP_COLUMN_INDEX:
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g_value_set_int (value, obj->column_index);
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break;
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case PROP_COLUMN_NAME:
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g_value_set_string (value, obj->column_name);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, property_id, pspec);
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}
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Class
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static void db_param_init (DbParam * obj)
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{
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obj->column_index = -1;
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obj->column_name = NULL;
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obj->iterator = NULL;
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g_signal_connect (obj, "value-changed",
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G_CALLBACK (db_param_on_value_changed), NULL);
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}
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static void db_param_finalize (DbParam * obj)
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{
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if (obj->iterator)
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{
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g_object_disconnect (obj->iterator
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,"any_signal", db_param_on_iterator_iter_changed, obj
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,"any_signal", db_param_on_iterator_status_changed, obj
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,NULL
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);
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g_clear_object (&obj->iterator);
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}
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g_signal_handlers_disconnect_by_func (obj,
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db_param_on_value_changed, NULL);
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g_free (obj->column_name);
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G_OBJECT_CLASS (db_param_parent_class)->finalize (G_OBJECT (obj));
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}
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static void db_param_class_init (DbParamClass * k)
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{
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GObjectClass * klass = G_OBJECT_CLASS (k);
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klass->finalize = (GObjectFinalizeFunc) db_param_finalize;
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klass->set_property = (GObjectSetPropertyFunc) db_param_set_property;
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klass->get_property = (GObjectGetPropertyFunc) db_param_get_property;
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g_object_class_install_property (klass, PROP_ITERATOR,
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g_param_spec_object ("iterator"
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,_("Iterator")
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,_("The iterator owner of param")
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,DB_TYPE_ITERATOR
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,G_PARAM_READWRITE
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));
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g_object_class_install_property (klass, PROP_COLUMN_INDEX,
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g_param_spec_int ("column-index"
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,_("Column index")
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,_("The referenced column index")
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,-1 ,1024 ,-1
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,G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE
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));
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g_object_class_install_property (klass, PROP_COLUMN_NAME,
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g_param_spec_string ("column-name"
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,_("Column name")
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,_("The referenced column name")
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,NULL
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,G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE
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));
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}
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