[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 (qt-info@nokia.com)
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| 6 | **
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| 7 | ** This file is part of the QtDeclarative module of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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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
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| 14 | ** a written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Lesser General Public License Usage
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 18 | ** General Public License version 2.1 as published by the Free Software
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 20 | ** packaging of this file. Please review the following information to
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 23 | **
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| 24 | ** In addition, as a special exception, Nokia gives you certain additional
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| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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| 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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| 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at qt-info@nokia.com.
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| 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | #include "qdeclarativeparserstatus.h"
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| 43 |
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| 44 | QT_BEGIN_NAMESPACE
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| 45 |
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| 46 | /*!
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| 47 | \class QDeclarativeParserStatus
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| 48 | \since 4.7
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| 49 | \brief The QDeclarativeParserStatus class provides updates on the QML parser state.
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| 50 |
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| 51 | QDeclarativeParserStatus provides a mechanism for classes instantiated by
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| 52 | a QDeclarativeEngine to receive notification at key points in their creation.
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| 53 |
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| 54 | This class is often used for optimization purposes, as it allows you to defer an
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| 55 | expensive operation until after all the properties have been set on an
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| 56 | object. For example, QML's \l {Text} element uses the parser status
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| 57 | to defer text layout until all of its properties have been set (we
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| 58 | don't want to layout when the \c text is assigned, and then relayout
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| 59 | when the \c font is assigned, and relayout again when the \c width is assigned,
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| 60 | and so on).
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| 61 |
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| 62 | To use QDeclarativeParserStatus, you must inherit both a QObject-derived class
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| 63 | and QDeclarativeParserStatus, and use the Q_INTERFACES() macro.
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| 64 |
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| 65 | \code
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| 66 | class MyObject : public QObject, public QDeclarativeParserStatus
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| 67 | {
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| 68 | Q_OBJECT
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| 69 | Q_INTERFACES(QDeclarativeParserStatus)
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| 70 |
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| 71 | public:
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| 72 | MyObject(QObject *parent = 0);
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| 73 | ...
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| 74 | void classBegin();
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| 75 | void componentComplete();
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| 76 | }
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| 77 | \endcode
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| 78 | */
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| 79 |
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| 80 | /*! \internal */
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| 81 | QDeclarativeParserStatus::QDeclarativeParserStatus()
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| 82 | : d(0)
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| 83 | {
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| 84 | }
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| 85 |
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| 86 | /*! \internal */
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| 87 | QDeclarativeParserStatus::~QDeclarativeParserStatus()
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| 88 | {
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| 89 | if(d)
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| 90 | (*d) = 0;
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| 91 | }
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| 92 |
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| 93 | /*!
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| 94 | \fn void QDeclarativeParserStatus::classBegin()
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| 95 |
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| 96 | Invoked after class creation, but before any properties have been set.
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| 97 | */
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| 98 |
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| 99 | /*!
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| 100 | \fn void QDeclarativeParserStatus::componentComplete()
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| 101 |
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| 102 | Invoked after the root component that caused this instantiation has
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| 103 | completed construction. At this point all static values and binding values
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| 104 | have been assigned to the class.
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| 105 | */
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| 106 |
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| 107 | QT_END_NAMESPACE
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