summaryrefslogtreecommitdiffstats
path: root/examples/declarative/demos/snake/qml/snake/content/HighScoreModel.qml
diff options
context:
space:
mode:
Diffstat (limited to 'examples/declarative/demos/snake/qml/snake/content/HighScoreModel.qml')
-rw-r--r--examples/declarative/demos/snake/qml/snake/content/HighScoreModel.qml139
1 files changed, 139 insertions, 0 deletions
diff --git a/examples/declarative/demos/snake/qml/snake/content/HighScoreModel.qml b/examples/declarative/demos/snake/qml/snake/content/HighScoreModel.qml
new file mode 100644
index 00000000..c9a81831
--- /dev/null
+++ b/examples/declarative/demos/snake/qml/snake/content/HighScoreModel.qml
@@ -0,0 +1,139 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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, Digia gives you certain additional
+** rights. These rights are described in the Digia 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+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() }
+}