1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the documentation of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <QApplication>

    43 #include <QBuffer>

    44 #include <QPalette>

    45 

    46 static void main_snippet()

    47 {

    48 //! [0]

    49     QBuffer buffer;

    50     char ch;

    51 

    52     buffer.open(QBuffer::ReadWrite);

    53     buffer.write("Qt rocks!");

    54     buffer.seek(0);

    55     buffer.getChar(&ch);  // ch == 'Q'

    56     buffer.getChar(&ch);  // ch == 't'

    57     buffer.getChar(&ch);  // ch == ' '

    58     buffer.getChar(&ch);  // ch == 'r'

    59 //! [0]

    60 }

    61 

    62 static void write_datastream_snippets()

    63 {

    64 //! [1]

    65     QByteArray byteArray;

    66     QBuffer buffer(&byteArray);

    67     buffer.open(QIODevice::WriteOnly);

    68 

    69     QDataStream out(&buffer);

    70     out << QApplication::palette();

    71 //! [1]

    72 }

    73 

    74 static void read_datastream_snippets()

    75 {

    76     QByteArray byteArray;

    77 

    78 //! [2]

    79     QPalette palette;

    80     QBuffer buffer(&byteArray);

    81     buffer.open(QIODevice::ReadOnly);

    82 

    83     QDataStream in(&buffer);

    84     in >> palette;

    85 //! [2]

    86 }

    87 

    88 static void bytearray_ptr_ctor_snippet()

    89 {

    90 //! [3]

    91     QByteArray byteArray("abc");

    92     QBuffer buffer(&byteArray);

    93     buffer.open(QIODevice::WriteOnly);

    94     buffer.seek(3);

    95     buffer.write("def", 3);

    96     buffer.close();

    97     // byteArray == "abcdef"

    98 //! [3]

    99 }

   100 

   101 static void setBuffer_snippet()

   102 {

   103 //! [4]

   104     QByteArray byteArray("abc");

   105     QBuffer buffer;

   106     buffer.setBuffer(&byteArray);

   107     buffer.open(QIODevice::WriteOnly);

   108     buffer.seek(3);

   109     buffer.write("def", 3);

   110     buffer.close();

   111     // byteArray == "abcdef"

   112 //! [4]

   113 }

   114 

   115 int main(int argc, char *argv[])

   116 {

   117     QApplication app(argc, argv);

   118 

   119     main_snippet();

   120     bytearray_ptr_ctor_snippet();

   121     write_datastream_snippets();

   122     read_datastream_snippets();

   123     setBuffer_snippet();

   124     return 0;

   125 }