| 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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| 7 | ** This file is part of the documentation of the Qt Toolkit.
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| 9 | ** $QT_BEGIN_LICENSE:FDL$
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| 16 | ** GNU Free Documentation License
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| 27 |
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| 28 | /*!
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| 29 | \page objecttrees.html
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| 30 | \title Object Trees & Ownership
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| 31 | \ingroup qt-basic-concepts
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| 32 | \brief Information about the parent-child pattern used to describe
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| 33 | object ownership in Qt.
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| 34 |
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| 35 | \section1 Overview
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| 36 |
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| 37 | \link QObject QObjects\endlink organize themselves in object trees.
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| 38 | When you create a QObject with another object as parent, it's added to
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| 39 | the parent's \link QObject::children() children() \endlink list, and
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| 40 | is deleted when the parent is. It turns out that this approach fits
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| 41 | the needs of GUI objects very well. For example, a \l QShortcut
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| 42 | (keyboard shortcut) is a child of the relevant window, so when the
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| 43 | user closes that window, the shorcut is deleted too.
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| 44 |
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| 45 | \l QWidget, the base class of everything that appears on the screen,
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