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44 // Models a high score table.
46 // Use this component like this:
53 // Then use either use the top-score properties:
55 // Text { text: "HI: " + highScores.topScore }
57 // or, use the model in a view:
61 // delegate: Component {
62 // ... player ... score ...
66 // Add new scores via:
68 // saveScore(newScore)
72 // savePlayerScore(playerName,newScore)
74 // The best maxScore scores added by this method will be retained in an SQL database,
75 // and presented in the model and in the topScore/topPlayer properties.
80 property string game: ""
81 property int topScore: 0
82 property string topPlayer: ""
83 property int maxScores: 10
87 return openDatabaseSync("HighScoreModel", "1.0", "Generic High Score Functionality for QML", 1000000);
89 function __ensureTables(tx)
91 tx.executeSql('CREATE TABLE IF NOT EXISTS HighScores(game TEXT, score INT, player TEXT)', []);
94 function fillModel() {
98 var rs = tx.executeSql("SELECT score,player FROM HighScores WHERE game=? ORDER BY score DESC", [game]);
100 if (rs.rows.length > 0) {
101 topScore = rs.rows.item(0).score
102 topPlayer = rs.rows.item(0).player
103 for (var i=0; i<rs.rows.length; ++i) {
105 model.append(rs.rows.item(i))
107 if (rs.rows.length > maxScores)
108 tx.executeSql("DELETE FROM HighScores WHERE game=? AND score <= ?",
109 [game, rs.rows.item(maxScores).score]);
115 function savePlayerScore(player,score) {
119 tx.executeSql("INSERT INTO HighScores VALUES(?,?,?)", [game,score,player]);
125 function saveScore(score) {
126 savePlayerScore("player",score);
129 function clearScores() {
132 tx.executeSql("DELETE FROM HighScores WHERE game=?", [game]);
138 Component.onCompleted: { fillModel() }