| [844] | 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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| 6 | **
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| 7 | ** This file is part of the documentation of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:FDL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in a
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| 14 | ** written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Free Documentation License
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Free
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| 18 | ** Documentation License version 1.3 as published by the Free Software
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| 19 | ** Foundation and appearing in the file included in the packaging of this
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| 20 | ** file.
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| 21 | **
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| 22 | ** If you have questions regarding the use of this file, please contact
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| 23 | ** Nokia at [email protected].
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| 24 | ** $QT_END_LICENSE$
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| 25 | **
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| 26 | ****************************************************************************/
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| 27 |
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| 28 | /*!
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| 29 | \page gettingstartedqt.html
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| 30 |
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| 31 | \title Getting Started Programming with Qt
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| 32 | \ingroup gettingStarted
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| 33 |
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| 34 | Welcome to the world of Qt--the cross-platform GUI toolkit. In
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| 35 | this getting started guide, we teach basic Qt knowledge by
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| 36 | implementing a simple Notepad application. After reading this
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| 37 | guide, you should be ready to delve into our overviews and API
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| 38 | documentation, and find the information you need for the
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| 39 | application you are developing.
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| 40 |
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| 41 | \section1 Hello Notepad
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| 42 |
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| 43 | In this first example, we simply create and show a text edit in a
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| 44 | window frame on the desktop. This represents the simplest possible
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| 45 | Qt program that has a GUI.
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| 46 |
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| 47 | \image gs1.png
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| 48 |
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| 49 | Here is the code:
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| 50 |
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| 51 | \code
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| 52 | 1 #include <QApplication>
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| 53 | 2 #include <QTextEdit>
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| 54 | 3
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| 55 | 4 int main(int argv, char **args)
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| 56 | 5 {
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| 57 | 6 QApplication app(argv, args);
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| 58 | 7
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| 59 | 8 QTextEdit textEdit;
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| 60 | 9 textEdit.show();
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| 61 | 10
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| 62 | 11 return app.exec();
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| 63 | 12 }
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| 64 | \endcode
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| 65 |
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| 66 | Let us go through the code line by line. In the first two lines, we
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| 67 | include the header files for QApplication and QTextEdit, which are
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| 68 | the two classes that we need for this example. All Qt classes have
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| 69 | a header file named after them.
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