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<h1 class="title">Database.js Example File</h1>
<span class="subtitle">localstorage/localstorage/Database.js</span>
<!-- $$$localstorage/localstorage/Database.js-description -->
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<pre class="js">

  /****************************************************************************
  **
  ** Copyright (C) 2017 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the documentation of the Qt Toolkit.
  **
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  function dbInit()
  {
      var db = LocalStorage.openDatabaseSync("Activity_Tracker_DB", "", "Track exercise", 1000000)
      try {
          db.transaction(function (tx) {
              tx.executeSql('CREATE TABLE IF NOT EXISTS trip_log (date text,trip_desc text,distance numeric)')
          })
      } catch (err) {
          console.log("Error creating table in database: " + err)
      };
  }

  function dbGetHandle()
  {
      try {
          var db = LocalStorage.openDatabaseSync("Activity_Tracker_DB", "",
                                                 "Track exercise", 1000000)
      } catch (err) {
          console.log("Error opening database: " + err)
      }
      return db
  }

  function dbInsert(Pdate, Pdesc, Pdistance)
  {
      var db = dbGetHandle()
      var rowid = 0;
      db.transaction(function (tx) {
          tx.executeSql('INSERT INTO trip_log VALUES(?, ?, ?)',
                        [Pdate, Pdesc, Pdistance])
          var result = tx.executeSql('SELECT last_insert_rowid()')
          rowid = result.insertId
      })
      return rowid;
  }

  function dbReadAll()
  {
      var db = dbGetHandle()
      db.transaction(function (tx) {
          var results = tx.executeSql(
                      'SELECT rowid,date,trip_desc,distance FROM trip_log order by rowid desc')
          for (var i = 0; i < results.rows.length; i++) {
              listModel.append({
                                   id: results.rows.item(i).rowid,
                                   checked: " ",
                                   date: results.rows.item(i).date,
                                   trip_desc: results.rows.item(i).trip_desc,
                                   distance: results.rows.item(i).distance
                               })
          }
      })
  }

  function dbUpdate(Pdate, Pdesc, Pdistance, Prowid)
  {
      var db = dbGetHandle()
      db.transaction(function (tx) {
          tx.executeSql(
                      'update trip_log set date=?, trip_desc=?, distance=? where rowid = ?', [Pdate, Pdesc, Pdistance, Prowid])
      })
  }

  function dbDeleteRow(Prowid)
  {
      var db = dbGetHandle()
      db.transaction(function (tx) {
          tx.executeSql('delete from trip_log where rowid = ?', [Prowid])
      })
  }

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