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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 1.0
// Models a high score table.
//
// Use this component like this:
//
// HighScoreModel {
// id: highScores
// game: "MyCoolGame"
// }
//
// Then use either use the top-score properties:
//
// Text { text: "HI: " + highScores.topScore }
//
// or, use the model in a view:
//
// ListView {
// model: highScore
// delegate: Component {
// ... player ... score ...
// }
// }
//
// Add new scores via:
//
// saveScore(newScore)
//
// or:
//
// savePlayerScore(playerName,newScore)
//
// The best maxScore scores added by this method will be retained in an SQL database,
// and presented in the model and in the topScore/topPlayer properties.
//
ListModel {
id: model
property string game: ""
property int topScore: 0
property string topPlayer: ""
property int maxScores: 10
function __db()
{
return openDatabaseSync("HighScoreModel", "1.0", "Generic High Score Functionality for QML", 1000000);
}
function __ensureTables(tx)
{
tx.executeSql('CREATE TABLE IF NOT EXISTS HighScores(game TEXT, score INT, player TEXT)', []);
}
function fillModel() {
__db().transaction(
function(tx) {
__ensureTables(tx);
var rs = tx.executeSql("SELECT score,player FROM HighScores WHERE game=? ORDER BY score DESC", [game]);
model.clear();
if (rs.rows.length > 0) {
topScore = rs.rows.item(0).score
topPlayer = rs.rows.item(0).player
for (var i=0; i<rs.rows.length; ++i) {
if (i < maxScores)
model.append(rs.rows.item(i))
}
if (rs.rows.length > maxScores)
tx.executeSql("DELETE FROM HighScores WHERE game=? AND score <= ?",
[game, rs.rows.item(maxScores).score]);
}
}
)
}
function savePlayerScore(player,score) {
__db().transaction(
function(tx) {
__ensureTables(tx);
tx.executeSql("INSERT INTO HighScores VALUES(?,?,?)", [game,score,player]);
fillModel();
}
)
}
function saveScore(score) {
savePlayerScore("player",score);
}
function clearScores() {
__db().transaction(
function(tx) {
tx.executeSql("DELETE FROM HighScores WHERE game=?", [game]);
fillModel();
}
)
}
Component.onCompleted: { fillModel() }
}
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