328 lines
8.4 KiB
C
328 lines
8.4 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-completion.h"
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#include <db/db.h>
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#include <vn/vn-model.h>
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#include <string.h>
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#define set_icon(obj,icon_name) (gtk_entry_set_icon_from_icon_name (obj->entry, GTK_ENTRY_ICON_SECONDARY, icon_name))
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/**
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* SECTION:vn-completion
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* @Short_description: an auto-completable text box
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* @Title: VnCompletion
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* @See_also: #VnField
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* @Image: completion.png
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*
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* A text box widget that auto-completes as the user writes using the data
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* retrieved from a database.
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*/
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G_DEFINE_TYPE (VnCompletion, vn_completion, VN_TYPE_FIELD);
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/**
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* vn_completion_new:
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* @sql: the SQL string used by completion.
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* @field: the field where to search the values.
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*
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* Creates a new #VnCompletion.
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*
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* Return value: a #VnCompletion.
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**/
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VnField * vn_completion_new (const gchar * sql, const gchar * field)
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{
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return g_object_new (VN_TYPE_COMPLETION, "sql", sql, "field", field, NULL);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Private
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static void vn_completion_cb_status_changed (DbModel * model, DbModelStatus status, VnCompletion * obj)
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{
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const gchar * icon_name;
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if (status == DB_MODEL_STATUS_READY)
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{
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GtkTreeModel * tree = GTK_TREE_MODEL (vn_model_new (model));
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gtk_entry_completion_set_model (obj->completion, tree);
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g_signal_emit_by_name (obj->entry, "changed");
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g_object_unref (tree);
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icon_name = NULL;
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}
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else
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{
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switch (status)
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{
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case DB_MODEL_STATUS_LOADING:
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icon_name = "edit-find";
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break;
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case DB_MODEL_STATUS_ERROR:
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icon_name = "edit-delete";
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break;
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default:
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icon_name = NULL;
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}
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gtk_entry_completion_set_model (obj->completion, NULL);
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}
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set_icon (obj, icon_name);
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}
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static void vn_completion_cb_changed (GtkEditable * entry, VnCompletion * obj)
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{
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const gchar * text = gtk_entry_get_text (GTK_ENTRY (entry));
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if (obj->invalid)
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{
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obj->invalid = FALSE;
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set_icon (obj, NULL);
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}
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if (obj->sql && strlen (text) == 1
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&& (!obj->last_match || g_strcmp0 (text, obj->last_match)))
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{
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gchar * pattern;
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GValue value = {0};
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set_icon (obj, "edit-find");
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g_free (obj->last_match);
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obj->last_match = g_strdup (text);
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pattern = g_strconcat (text, "%", NULL);
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g_value_init (&value, G_TYPE_STRING);
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g_value_set_string (&value, pattern);
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sql_value_set_value (SQL_VALUE (obj->value), &value);
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g_value_unset (&value);
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g_free (pattern);
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}
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}
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static void vn_completion_iter_changed (VnCompletion * obj, DbIter * iter)
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{
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const GValue * value = db_model_get_value (obj->model, iter, 0, NULL);
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if (value)
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VN_FIELD_GET_CLASS (obj)->value_changed (VN_FIELD (obj), value);
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set_icon (obj, "gtk-apply");
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}
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static void vn_completion_cb_activate (GtkEntry * entry, VnCompletion * obj)
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{
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gboolean ok = FALSE;
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const gchar * text = gtk_entry_get_text (entry);
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if (text && g_strcmp0 (text, ""))
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{
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DbModel * model = obj->model;
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if (db_model_get_column_type (model, obj->column) == G_TYPE_STRING)
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{
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DbIter iter;
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const GValue * v;
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if (db_model_get_iter_first (model, &iter))
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{
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do {
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v = db_model_get_value (model, &iter, obj->column, NULL);
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if (!gvn_value_is_null (v)
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&& !g_ascii_strcasecmp (g_value_get_string (v), text))
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{
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vn_completion_iter_changed (obj, &iter);
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ok = TRUE;
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}
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}
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while (!ok && db_model_iter_next (model, &iter));
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}
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}
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}
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if (!ok)
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{
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GValue value = {0};
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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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if (g_strcmp0 (text, ""))
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{
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obj->invalid = TRUE;
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set_icon (obj, "edit-delete");
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}
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else
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set_icon (obj, NULL);
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}
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}
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static gboolean vn_completion_match_selected (GtkEntryCompletion * completion,
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GtkTreeModel * model, GtkTreeIter * tree_iter, VnCompletion * obj)
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{
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DbIter iter;
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vn_gtk_tree_iter_to_db_iter (tree_iter, &iter);
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vn_completion_iter_changed (obj, &iter);
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return FALSE;
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}
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static void vn_completion_create_model (VnCompletion * obj)
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{
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SqlExpr * field;
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SqlString * stmt;
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SqlOperation * op;
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if (!(obj->sql && obj->field))
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return;
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op = sql_operation_new (SQL_OPERATION_TYPE_LIKE);
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field = sql_field_new (obj->field, NULL, NULL);
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sql_operation_add_expr (op, field);
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obj->value = sql_value_new ();
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sql_operation_add_expr (op, obj->value);
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stmt = sql_string_new (obj->sql);
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sql_string_add_expr (stmt, field);
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sql_string_add_expr (stmt, SQL_EXPR (op));
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db_model_set_stmt (obj->model, SQL_STMT (stmt));
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Properties
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enum
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{
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PROP_CONN = 1
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,PROP_SQL
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,PROP_FIELD
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};
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static void vn_completion_set_property (VnCompletion * 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_CONN:
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db_model_set_conn (obj->model, g_value_get_object (value));
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break;
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case PROP_SQL:
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obj->sql = g_value_dup_string (value);
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vn_completion_create_model (obj);
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break;
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case PROP_FIELD:
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obj->field = g_value_dup_string (value);
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vn_completion_create_model (obj);
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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 vn_completion_get_property (VnCompletion * 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_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_completion_init (VnCompletion * obj)
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{
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GtkEntryCompletion * completion;
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obj->sql = NULL;
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obj->field = NULL;
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obj->last_match = NULL;
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obj->invalid = FALSE;
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obj->column = 1;
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obj->entry = GTK_ENTRY (gtk_entry_new ());
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gtk_entry_set_icon_sensitive (obj->entry, GTK_ENTRY_ICON_SECONDARY, FALSE);
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g_object_connect (obj->entry,
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"signal::changed", vn_completion_cb_changed, obj
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,"signal::activate", vn_completion_cb_activate, obj
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,NULL
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);
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gtk_container_add (GTK_CONTAINER (obj), GTK_WIDGET (obj->entry));
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VN_FIELD (obj)->field = GTK_WIDGET (obj->entry);
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completion = gtk_entry_completion_new ();
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gtk_entry_completion_set_minimum_key_length (completion, 1);
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gtk_entry_completion_set_text_column (completion, obj->column);
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gtk_entry_completion_set_inline_selection (completion, FALSE);
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// gtk_entry_completion_set_inline_completion (completion, TRUE);
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g_signal_connect (completion, "match-selected",
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G_CALLBACK (vn_completion_match_selected), obj);
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gtk_entry_set_completion (obj->entry, completion);
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obj->completion = completion;
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obj->model = db_model_new (NULL, NULL);
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g_signal_connect (obj->model, "status-changed",
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G_CALLBACK (vn_completion_cb_status_changed), obj);
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}
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static void vn_completion_finalize (VnCompletion * obj)
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{
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g_free (obj->sql);
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g_free (obj->field);
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g_free (obj->last_match);
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g_object_unref (obj->completion);
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g_object_unref (obj->model);
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G_OBJECT_CLASS (vn_completion_parent_class)->finalize (G_OBJECT (obj));
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}
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static void vn_completion_class_init (VnCompletionClass * klass)
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{
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GObjectClass * k = G_OBJECT_CLASS (klass);
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k->finalize = (GObjectFinalizeFunc) vn_completion_finalize;
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k->set_property = (GObjectSetPropertyFunc) vn_completion_set_property;
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k->get_property = (GObjectGetPropertyFunc) vn_completion_get_property;
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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_WRITABLE | G_PARAM_CONSTRUCT_ONLY
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));
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g_object_class_install_property (k, PROP_FIELD,
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g_param_spec_string ("field"
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,_("Field")
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,_("The name of the field used for the search")
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,NULL
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,G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY
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));
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}
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