Doc: Updated Local Storage QML Types documentation

Change-Id: Idbaff2def0ad7171cbca912b54b30d43ef7771bf
Reviewed-by: Venugopal Shivashankar <Venugopal.Shivashankar@qt.io>

2 files changed, 82 insertions, 4 deletions

diff --git a/src/imports/localstorage/plugin.cpp b/src/imports/localstorage/plugin.cpp
index a043af6b46..6b2dd983af 100644
--- a/src/imports/localstorage/plugin.cpp
+++ b/src/imports/localstorage/plugin.cpp
@@ -585,9 +585,9 @@ import QtQuick.LocalStorage 2.0 as Sql
 db = Sql.openDatabaseSync(identifier, version, description, estimated_size, callback(db))
 \endcode
 The above code returns the database identified by \e identifier. If the database does not already exist, it
-is created, and the function \e callback is called with the database as a parameter. \e description
-and \e estimated_size are written to the INI file (described below), but are otherwise currently
-unused.
+is created, and the function \e callback is called with the database as a parameter. \e identifier is the
+name of the physical file (with or without full path) containing the database.  \e description and
+\e estimated_size are written to the INI file (described below), but are currently unused.
 
 May throw exception with code property SQLException.DATABASE_ERR, or SQLException.VERSION_ERR.
 
@@ -595,7 +595,7 @@ When a database is first created, an INI file is also created specifying its cha
 
 \table
 \header \li \b {Key} \li \b {Value}
-\row \li Name \li The name of the database passed to \c openDatabase()
+\row \li Identifier \li The name of the database passed to \c openDatabase()
 \row \li Version \li The version of the database passed to \c openDatabase()
 \row \li Description \li The description of the database passed to \c openDatabase()
 \row \li EstimatedSize \li The estimated size (in bytes) of the database passed to \c openDatabase()
@@ -615,12 +615,19 @@ you can call \e executeSql on \e tx to upgrade the database.
 
 May throw exception with code property SQLException.DATABASE_ERR or SQLException.UNKNOWN_ERR.
 
+See example below.
+
+\snippet qml/localstorage/dbtransaction.js 2
+
 \section3 db.transaction(callback(tx))
 
 This method creates a read/write transaction and passed to \e callback. In this function,
 you can call \e executeSql on \e tx to read and modify the database.
 
 If the callback throws exceptions, the transaction is rolled back.
+Below you will find an example of a database transaction which catches exceptions.
+
+\snippet qml/localstorage/dbtransaction.js 0
 
 \section3 db.readTransaction(callback(tx))
 
@@ -643,6 +650,9 @@ It returns a results object, with the following properties:
 
 May throw exception with code property SQLException.DATABASE_ERR, SQLException.SYNTAX_ERR, or SQLException.UNKNOWN_ERR.
 
+See below for an example:
+
+\snippet qml/localstorage/dbtransaction.js 1
 
 \section1 Method Documentation
 
diff --git a/src/quick/doc/snippets/qml/localstorage/dbtransaction.js b/src/quick/doc/snippets/qml/localstorage/dbtransaction.js
new file mode 100644
index 0000000000..07d8a5618b
--- /dev/null
+++ b/src/quick/doc/snippets/qml/localstorage/dbtransaction.js
@@ -0,0 +1,68 @@
+ /****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//![0]
+db.transaction(
+    try {
+        function(tx) {
+            tx.executeSql('INSERT INTO Greeting VALUES(?, ?)', [ 'hello', 'world' ]);
+        }
+    }   catch (err) {
+            console.log("Error inserting into table Greeting");
+        }
+)
+//![0]
+
+//![1]
+db.transaction(
+    function(tx) {
+        var results = tx.executeSql('SELECT salutation FROM Greeting WHERE salutee=?;', 'world');
+    }
+    console.log("We greeted in this most respectful way: " + results.rows.item(0).value);
+)
+//![1]
+//![2]
+var db = LocalStorage.openDatabaseSync("QQmlExampleDB", "", "The Example QML SQL!", 1000000);
+if (db.version == '0.1') {
+    db.changeVersion('0.1', '0.2', function(tx) {
+        tx.executeSql('INSERT INTO Greeting VALUES(?, ?)', [ 'hello', 'world' ]);
+    }
+});
+//![2]