362 lines
8.9 KiB
C
362 lines
8.9 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 "vn-combo.h"
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#include "../vn-model.h"
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#include <db/db.h>
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/**
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* SECTION:vn-combo
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* @Short_description: a combo box widget
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* @Title: VnCombo
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* @See_also: #VnField
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* @Image: combo.png
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*
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* A combo box widget to select from a list of items, selected from a
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* database.
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*/
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G_DEFINE_TYPE (VnCombo, vn_combo, VN_TYPE_FIELD);
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/**
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* vn_combo_new:
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* @model: the model used by combo box
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*
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* Creates a new #VnCombo
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*
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* Return value: a #VnCombo
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**/
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VnField * vn_combo_new (DbModel * model)
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{
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return g_object_new (VN_TYPE_COMBO, "model", model, NULL);
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}
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/**
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* vn_combo_new_with_sql:
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* @conn: the connection used to create the combo model
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* @sql: the SQL query used to create the combo model
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*
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* Creates a new #VnCombo
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*
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* Return value: a #VnCombo
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**/
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VnField * vn_combo_new_with_sql (DbConn * conn, const gchar * sql)
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{
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return g_object_new (VN_TYPE_COMBO, "sql", sql, "conn", conn, NULL);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Private
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static void vn_combo_cb_changed (GtkComboBox * combo, VnCombo * obj)
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{
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GtkTreeIter iter;
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GValue value = {0};
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if (gtk_combo_box_get_active_iter (combo, &iter))
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gtk_tree_model_get_value (obj->tree, &iter, obj->index_column, &value);
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else
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g_value_init (&value, GVN_TYPE_NULL);
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VN_FIELD_GET_CLASS (obj)->value_changed (VN_FIELD (obj), &value);
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g_value_unset (&value);
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}
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static void vn_combo_on_model_ready (VnCombo * obj, const GValue * value)
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{
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DbIter iter;
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g_signal_handlers_block_by_func (obj->combo,
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vn_combo_cb_changed, obj);
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if (!gvn_value_is_null (value)
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&& db_model_search_value (obj->model, obj->index_column, &iter, value))
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{
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GtkTreeIter tree_iter;
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vn_gtk_tree_iter_from_db_iter (&tree_iter, &iter);
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gtk_combo_box_set_active_iter (obj->combo, &tree_iter);
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}
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else
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gtk_combo_box_set_active_iter (obj->combo, NULL);
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g_signal_handlers_unblock_by_func (obj->combo,
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vn_combo_cb_changed, obj);
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}
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static void vn_combo_set_value (VnCombo * obj, const GValue * value)
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{
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if (obj->model && db_model_get_status (obj->model) == DB_MODEL_STATUS_READY)
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vn_combo_on_model_ready (obj, value);
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}
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static void vn_combo_cb_status_changed (DbModel * model, DbModelStatus status, VnCombo * obj)
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{
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if (status == DB_MODEL_STATUS_READY)
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{
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gtk_combo_box_set_model (obj->combo, obj->tree);
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vn_combo_on_model_ready (obj, vn_field_get_value (VN_FIELD (obj)));
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}
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else
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gtk_combo_box_set_model (obj->combo, NULL);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Public
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/**
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* vn_combo_set_conn:
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* @obj: a #VnCombo
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* @conn: the #DbConn
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*
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* Sets the connection used to create the combo model.
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**/
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void vn_combo_set_conn (VnCombo * obj, DbConn * conn)
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{
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g_return_if_fail (VN_IS_COMBO (obj));
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g_return_if_fail (DB_IS_CONN (conn));
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g_return_if_fail (obj->model);
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db_model_set_conn (obj->model, conn);
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}
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/**
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* vn_combo_set_model:
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* @obj: a #VnCombo
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* @model: the #DbModel
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*
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* Sets the SQL query used to create the combo model.
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**/
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void vn_combo_set_model (VnCombo * obj, DbModel * model)
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{
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g_return_if_fail (VN_IS_COMBO (obj));
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g_return_if_fail (DB_IS_MODEL (model) || !model);
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if (obj->model)
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{
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g_signal_handlers_disconnect_by_func (obj->model,
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vn_combo_cb_status_changed, obj);
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g_clear_object (&obj->model);
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g_clear_object (&obj->tree);
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}
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if (model)
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{
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obj->tree = GTK_TREE_MODEL (vn_model_new (model));
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obj->model = g_object_ref (model);
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g_signal_connect (model, "status-changed",
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G_CALLBACK (vn_combo_cb_status_changed), obj);
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vn_combo_cb_status_changed (model,
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db_model_get_status (model), obj);
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}
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}
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/**
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* vn_combo_get_index_column:
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* @obj: a #VnCombo
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*
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* Gets the combo column index.
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*
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* Return value: the column
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**/
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guint vn_combo_get_index_column (VnCombo * obj)
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{
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g_return_val_if_fail (VN_IS_COMBO (obj), 0);
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return obj->index_column;
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}
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/**
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* vn_combo_set_index_column:
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* @obj: a #VnCombo
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* @column: the column
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*
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* Sets the column index used by combo.
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**/
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void vn_combo_set_index_column (VnCombo * obj, guint column)
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{
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g_return_if_fail (VN_IS_COMBO (obj));
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obj->index_column = column;
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vn_combo_set_value (obj, vn_field_get_value (VN_FIELD (obj)));
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}
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/**
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* vn_combo_get_show_column:
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* @obj: a #VnCombo
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*
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* Gets the column shown by combo.
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*
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* Return value: the column
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**/
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guint vn_combo_get_show_column (VnCombo * obj)
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{
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g_return_val_if_fail (VN_IS_COMBO (obj), 0);
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return obj->show_column;
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}
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/**
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* vn_combo_set_show_column:
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* @obj: a #VnCombo
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* @column: the column
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*
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* Sets the column shown by combo.
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**/
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void vn_combo_set_show_column (VnCombo * obj, guint column)
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{
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g_return_if_fail (VN_IS_COMBO (obj));
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obj->show_column = column;
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gtk_cell_layout_clear_attributes (GTK_CELL_LAYOUT (obj->combo), obj->cell);
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gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (obj->combo),
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obj->cell, "text", (gint) obj->show_column);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Properties
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enum
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{
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PROP_INDEX_COLUMN = 1
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,PROP_SHOW_COLUMN
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,PROP_MODEL
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,PROP_CONN
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,PROP_SQL
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};
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static void vn_combo_set_property (VnCombo * 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_INDEX_COLUMN:
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vn_combo_set_index_column (obj, g_value_get_uint (value));
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break;
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case PROP_SHOW_COLUMN:
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vn_combo_set_show_column (obj, g_value_get_uint (value));
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break;
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case PROP_MODEL:
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vn_combo_set_model (obj, g_value_get_object (value));
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break;
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case PROP_CONN:
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vn_combo_set_conn (obj, g_value_get_object (value));
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break;
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case PROP_SQL:
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{
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const gchar * sql = g_value_get_string (value);
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if (sql)
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{
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DbModel * model = db_model_new_with_sql (NULL, g_value_get_string (value));
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vn_combo_set_model (obj, model);
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g_object_unref (model);
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}
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break;
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}
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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 vn_combo_get_property (VnCombo * 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_INDEX_COLUMN:
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g_value_set_uint (value, obj->index_column);
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break;
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case PROP_SHOW_COLUMN:
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g_value_set_uint (value, obj->show_column);
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break;
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case PROP_MODEL:
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g_value_set_object (value, obj->model);
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break;
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case PROP_CONN:
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g_value_set_object (value, db_model_get_conn (obj->model));
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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 vn_combo_init (VnCombo * obj)
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{
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obj->tree = NULL;
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obj->model = NULL;
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obj->combo = GTK_COMBO_BOX (gtk_combo_box_new ());
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g_signal_connect (obj->combo, "changed",
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G_CALLBACK (vn_combo_cb_changed), obj);
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gtk_container_add (GTK_CONTAINER (obj), GTK_WIDGET (obj->combo));
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obj->cell = gtk_cell_renderer_text_new ();
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gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (obj->combo), obj->cell, TRUE);
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VN_FIELD (obj)->field = GTK_WIDGET (obj->combo);
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}
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static void vn_combo_finalize (VnCombo * obj)
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{
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vn_combo_set_model (obj, NULL);
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G_OBJECT_CLASS (vn_combo_parent_class)->finalize (G_OBJECT (obj));
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}
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static void vn_combo_class_init (VnComboClass * klass)
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{
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GObjectClass * k = G_OBJECT_CLASS (klass);
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k->finalize = (GObjectFinalizeFunc) vn_combo_finalize;
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k->set_property = (GObjectSetPropertyFunc) vn_combo_set_property;
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k->get_property = (GObjectGetPropertyFunc) vn_combo_get_property;
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VN_FIELD_CLASS (klass)->set_value = (VnFieldSetValueFunc) vn_combo_set_value;
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g_object_class_install_property (k, PROP_INDEX_COLUMN,
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g_param_spec_uint ("index-column"
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,_("Index column")
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,_("The column index of the model")
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,0, 255, 0
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,G_PARAM_CONSTRUCT | G_PARAM_READWRITE
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));
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g_object_class_install_property (k, PROP_SHOW_COLUMN,
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g_param_spec_uint ("show-column"
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,_("Show column")
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,_("The column of the model shown by combo")
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,0, 255, 1
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,G_PARAM_CONSTRUCT | G_PARAM_READWRITE
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));
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g_object_class_install_property (k, PROP_MODEL,
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g_param_spec_object ("model"
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,_("Model")
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,_("The model from which the combo takes the values shown in the list")
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,DB_TYPE_MODEL
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,G_PARAM_READWRITE
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));
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g_object_class_install_property (k, PROP_CONN,
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g_param_spec_object ("conn"
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,_("Connection")
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,_("The connection used by the model")
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,DB_TYPE_CONN
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,G_PARAM_READWRITE
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));
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g_object_class_install_property (k, PROP_SQL,
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g_param_spec_string ("sql"
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,_("SQL")
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,_("The SQL query used to create the model")
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, NULL
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,G_PARAM_CONSTRUCT_ONLY | G_PARAM_WRITABLE
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));
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}
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