Added TQt4 HEAD

1 files changed, 172 insertions, 0 deletions

diff --git a/tqtinterface/qt4/src/kernel/tqobjectcleanuphandler.cpp b/tqtinterface/qt4/src/kernel/tqobjectcleanuphandler.cpp
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+++ b/tqtinterface/qt4/src/kernel/tqobjectcleanuphandler.cpp
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+/****************************************************************************
+**
+** Implementation of TQObjectCleanupHandler class
+**
+** Copyright (C) 2000-2008 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 requirements 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 "tqobjectcleanuphandler.h"
+#include "tqobjectlist.h"
+
+/*!
+    \class TQObjectCleanupHandler tqobjectcleanuphandler.h
+    \brief The TQObjectCleanupHandler class watches the lifetime of multiple TQObjects.
+
+    \ingroup objectmodel
+
+    A TQObjectCleanupHandler is useful whenever you need to know when a
+    number of \l{TQObject}s that are owned by someone else have been
+    deleted. This is important, for example, when referencing memory
+    in an application that has been allocated in a shared library.
+
+    Example:
+
+    \code
+    class FactoryComponent : public FactoryInterface, public TQLibraryInterface
+    {
+    public:
+	...
+
+	TQObject *createObject();
+
+	bool init();
+	void cleanup();
+	bool canUnload() const;
+
+    private:
+	TQObjectCleanupHandler objects;
+    };
+
+    // allocate a new object, and add it to the cleanup handler
+    TQObject *FactoryComponent::createObject()
+    {
+	return objects.add( new TQObject() );
+    }
+
+    // TQLibraryInterface implementation
+    bool FactoryComponent::init()
+    {
+	return TRUE;
+    }
+
+    void FactoryComponent::cleanup()
+    {
+    }
+
+    // it is only safe to unload the library when all TQObject's have been destroyed
+    bool FactoryComponent::canUnload() const
+    {
+	return objects.isEmpty();
+    }
+    \endcode
+*/
+
+/*!
+    Constructs an empty TQObjectCleanupHandler.
+*/
+TQObjectCleanupHandler::TQObjectCleanupHandler()
+: TQObject(), cleanupObjects( 0 )
+{
+}
+
+/*!
+    Destroys the cleanup handler. All objects in this cleanup handler
+    will be deleted.
+*/
+TQObjectCleanupHandler::~TQObjectCleanupHandler()
+{
+    clear();
+}
+
+/*!
+    Adds \a object to this cleanup handler and returns the pointer to
+    the object.
+*/
+TQObject* TQObjectCleanupHandler::add( TQObject* object )
+{
+    if ( !object )
+	return 0;
+
+    if ( !cleanupObjects ) {
+	cleanupObjects = new TQObjectList;
+ 	cleanupObjects->setAutoDelete( TRUE );
+    }
+    connect( object, TQT_SIGNAL(destroyed(TQObject*)), this, TQT_SLOT(objectDestroyed(TQObject*)) );
+    cleanupObjects->insert( 0, object );
+    return object;
+}
+
+/*!
+    Removes the \a object from this cleanup handler. The object will
+    not be destroyed.
+*/
+void TQObjectCleanupHandler::remove( TQObject *object )
+{
+    if ( !cleanupObjects )
+	return;
+    if ( cleanupObjects->tqfindRef( object ) >= 0 ) {
+	(void) cleanupObjects->take();
+	disconnect( object, TQT_SIGNAL(destroyed(TQObject*)), this, TQT_SLOT(objectDestroyed(TQObject*)) );
+    }
+}
+
+/*!
+    Returns TRUE if this cleanup handler is empty or if all objects in
+    this cleanup handler have been destroyed; otherwise return FALSE.
+*/
+bool TQObjectCleanupHandler::isEmpty() const
+{
+    return cleanupObjects ? cleanupObjects->isEmpty() : TRUE;
+}
+
+/*!
+    Deletes all objects in this cleanup handler. The cleanup handler
+    becomes empty.
+*/
+void TQObjectCleanupHandler::clear()
+{
+    delete cleanupObjects;
+    cleanupObjects = 0;
+}
+
+void TQObjectCleanupHandler::objectDestroyed( TQObject*object )
+{
+    if ( cleanupObjects )
+	cleanupObjects->setAutoDelete( FALSE );
+
+    remove( object );
+
+    if ( cleanupObjects )
+	cleanupObjects->setAutoDelete( TRUE );
+}