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+/****************************************************************************
+**
+** Implementation of TQSignal class
+**
+** Created : 941201
+**
+** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
+**
+** This file is part of the kernel module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing retquirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at sales@trolltech.com.
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
+** included in the packaging of this file. Licensees holding valid TQt
+** Commercial licenses may use this file in accordance with the TQt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#include "qsignal.h"
+#include "qmetaobject.h"
+#include "qguardedptr.h"
+
+/*!
+ \class TQSignal qsignal.h
+ \brief The TQSignal class can be used to send signals for classes
+ that don't inherit TQObject.
+
+ \ingroup io
+ \ingroup misc
+
+ If you want to send signals from a class that does not inherit
+ TQObject, you can create an internal TQSignal object to emit the
+ signal. You must also provide a function that connects the signal
+ to an outside object slot. This is how we have implemented
+ signals in the TQMenuData class, which is not a TQObject.
+
+ In general, we recommend inheriting TQObject instead. TQObject
+ provides much more functionality.
+
+ You can set a single TQVariant parameter for the signal with
+ setValue().
+
+ Note that TQObject is a \e private base class of TQSignal, i.e. you
+ cannot call any TQObject member functions from a TQSignal object.
+
+ Example:
+ \code
+ #include <qsignal.h>
+
+ class MyClass
+ {
+ public:
+ MyClass();
+ ~MyClass();
+
+ void doSomething();
+
+ void connect( TQObject *receiver, const char *member );
+
+ private:
+ TQSignal *sig;
+ };
+
+ MyClass::MyClass()
+ {
+ sig = new TQSignal;
+ }
+
+ MyClass::~MyClass()
+ {
+ delete sig;
+ }
+
+ void MyClass::doSomething()
+ {
+ // ... does something
+ sig->activate(); // emits the signal
+ }
+
+ void MyClass::connect( TQObject *receiver, const char *member )
+ {
+ sig->connect( receiver, member );
+ }
+ \endcode
+*/
+
+/*!
+ Constructs a signal object called \a name, with the parent object
+ \a parent. These arguments are passed directly to TQObject.
+*/
+
+TQSignal::TQSignal( TQObject *parent, const char *name )
+ : TQObject( parent, name )
+{
+ isSignal = TRUE;
+#ifndef QT_NO_VARIANT
+ val = 0;
+#endif
+}
+
+/*!
+ Destroys the signal. All connections are removed, as is the case
+ with all TQObjects.
+*/
+TQSignal::~TQSignal()
+{
+}
+#ifndef QT_NO_VARIANT
+// Returns TRUE if it matches ".+(.*int.*"
+static inline bool intSignature( const char *member )
+{
+ TQCString s( member );
+ int p = s.find( '(' );
+ return p > 0 && p < s.findRev( "int" );
+}
+#endif
+/*!
+ Connects the signal to \a member in object \a receiver.
+
+ \sa disconnect(), TQObject::connect()
+*/
+
+bool TQSignal::connect( const TQObject *receiver, const char *member )
+{
+#ifndef QT_NO_VARIANT
+ if ( intSignature( member ) )
+#endif
+ return TQObject::connect( (TQObject *)this, SIGNAL(intSignal(int)), receiver, member );
+#ifndef QT_NO_VARIANT
+ return TQObject::connect( (TQObject *)this, SIGNAL(signal(const TQVariant&)),
+ receiver, member );
+#endif
+}
+
+/*!
+ Disonnects the signal from \a member in object \a receiver.
+
+ \sa connect(), TQObject::disconnect()
+*/
+
+bool TQSignal::disconnect( const TQObject *receiver, const char *member )
+{
+ if (!member)
+ return TQObject::disconnect( (TQObject *)this, 0, receiver, member);
+#ifndef QT_NO_VARIANT
+ if ( intSignature( member ) )
+#endif
+ return TQObject::disconnect( (TQObject *)this, SIGNAL(intSignal(int)), receiver, member );
+#ifndef QT_NO_VARIANT
+ return TQObject::disconnect( (TQObject *)this, SIGNAL(signal(const TQVariant&)),
+ receiver, member );
+#endif
+}
+
+
+/*!
+ \fn bool TQSignal::isBlocked() const
+ \obsolete
+ Returns TRUE if the signal is blocked, or FALSE if it is not blocked.
+
+ The signal is not blocked by default.
+
+ \sa block(), TQObject::signalsBlocked()
+*/
+
+/*!
+ \fn void TQSignal::block( bool b )
+ \obsolete
+ Blocks the signal if \a b is TRUE, or unblocks the signal if \a b is FALSE.
+
+ An activated signal disappears into hyperspace if it is blocked.
+
+ \sa isBlocked(), activate(), TQObject::blockSignals()
+*/
+
+
+/*!
+ \fn void TQSignal::activate()
+
+ Emits the signal. If the platform supports TQVariant and a
+ parameter has been set with setValue(), this value is passed in
+ the signal.
+*/
+void TQSignal::activate()
+{
+#ifndef QT_NO_VARIANT
+ /* Create this TQGuardedPtr on this, if we get destroyed after the intSignal (but before the variant signal)
+ we cannot just emit the signal (because val has been destroyed already) */
+ TQGuardedPtr<TQSignal> me = this;
+ if( me )
+ emit intSignal( val.toInt() );
+ if( me )
+ emit signal( val );
+#else
+ emit intSignal(0);
+#endif
+}
+
+#ifndef QT_NO_VARIANT
+/*!
+ Sets the signal's parameter to \a value
+*/
+void TQSignal::setValue( const TQVariant &value )
+{
+ val = value;
+}
+
+/*!
+ Returns the signal's parameter
+*/
+TQVariant TQSignal::value() const
+{
+ return val;
+}
+/*! \fn void TQSignal::signal( const TQVariant & )
+ \internal
+*/
+/*! \fn void TQSignal::intSignal( int )
+ \internal
+*/
+
+#ifndef QT_NO_COMPAT
+/*! \obsolete */
+void TQSignal::setParameter( int value )
+{
+ val = value;
+}
+
+/*! \obsolete */
+int TQSignal::parameter() const
+{
+ return val.toInt();
+}
+#endif
+#endif //QT_NO_VARIANT