| 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 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 qt-info@nokia.com.
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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 | \class QSignalSpy
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| 30 | \inmodule QtTest
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| 31 |
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| 32 | \brief The QSignalSpy class enables introspection of signal emission.
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| 33 |
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| 34 | QSignalSpy can connect to any signal of any object and records its emission.
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| 35 | QSignalSpy itself is a list of QVariant lists. Each emission of the signal
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| 36 | will append one item to the list, containing the arguments of the signal.
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| 37 |
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| 38 | The following example records all signal emissions for the \c clicked() signal
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| 39 | of a QCheckBox:
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| 40 |
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| 41 | \snippet doc/src/snippets/code/doc_src_qsignalspy.qdoc 0
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| 42 |
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| 43 | \c{spy.takeFirst()} returns the arguments for the first emitted signal, as a
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| 44 | list of QVariant objects. The \c clicked() signal has a single bool argument,
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| 45 | which is stored as the first entry in the list of arguments.
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| 46 |
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| 47 | The example below catches a signal from a custom object:
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| 48 |
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| 49 | \snippet doc/src/snippets/code/doc_src_qsignalspy.qdoc 1
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| 50 |
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| 51 | \bold {Note:} Non-standard data types need to be registered, using
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| 52 | the qRegisterMetaType() function, before you can create a
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| 53 | QSignalSpy. For example:
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| 54 |
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| 55 | \snippet doc/src/snippets/code/doc_src_qsignalspy.qdoc 2
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| 56 |
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| 57 | To retrieve the \c QModelIndex, you can use qvariant_cast:
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| 58 |
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| 59 | \snippet doc/src/snippets/code/doc_src_qsignalspy.qdoc 3
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| 60 | */
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| 61 |
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| 62 | /*! \fn QSignalSpy::QSignalSpy(QObject *object, const char *signal)
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| 63 |
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| 64 | Constructs a new QSignalSpy that listens for emissions of the \a signal
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| 65 | from the QObject \a object. Neither \a signal nor \a object can be null.
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| 66 |
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| 67 | Example:
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| 68 | \snippet doc/src/snippets/code/doc_src_qsignalspy.qdoc 4
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| 69 | */
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| 70 |
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| 71 | /*! \fn QSignalSpy::isValid() const
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| 72 |
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| 73 | Returns true if the signal spy listens to a valid signal, otherwise false.
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| 74 | */
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| 75 |
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| 76 | /*! \fn QSignalSpy::signal() const
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| 77 |
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| 78 | Returns the normalized signal the spy is currently listening to.
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| 79 | */
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| 80 |
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| 81 | /*! \fn int QSignalSpy::qt_metacall(QMetaObject::Call call, int id, void **a)
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| 82 | \internal
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| 83 | */
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| 84 |
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