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+/****************************************************************************
+**
+** Implementation of TQFocusData class
+**
+** Created : 980622
+**
+** 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 "qfocusdata.h"
+
+/*!
+ \class TQFocusData qfocusdata.h
+ \brief The TQFocusData class maintains the list of widgets in the focus
+ chain.
+
+ \ingroup misc
+
+ This read-only list always contains at least one widget (i.e. the
+ top-level widget). It provides a simple cursor which can be reset
+ to the current focus widget using home(), or moved to its
+ neighboring widgets using next() and prev(). You can also retrieve
+ the count() of the number of widgets in the list. The list is a
+ loop, so if you keep iterating, for example using next(), you will
+ never come to the end.
+
+ Some widgets in the list may not accept focus. Widgets are added
+ to the list as necessary, but not removed from it. This lets
+ widgets change focus policy dynamically without disrupting the
+ focus chain the user experiences. When a widget disables and
+ re-enables tab focus, its position in the focus chain does not
+ change.
+
+ When reimplementing TQWidget::focusNextPrevChild() to provide
+ special focus flow, you will usually call TQWidget::focusData() to
+ retrieve the focus data stored at the top-level widget. A
+ top-level widget's focus data contains the focus list for its
+ hierarchy of widgets.
+
+ The cursor may change at any time.
+
+ This class is \e not thread-safe.
+
+ \sa TQWidget::focusNextPrevChild() TQWidget::setTabOrder()
+ TQWidget::setFocusPolicy()
+*/
+
+/*!
+ \fn TQWidget* TQFocusData::focusWidget() const
+
+ Returns the widgets in the hierarchy that are in the focus chain.
+*/
+
+/*!
+ \fn int TQFocusData::count() const
+
+ Returns the number of widgets in the focus chain.
+*/
+
+/*!
+ Moves the cursor to the focusWidget() and returns that widget. You
+ must call this before next() or prev() to iterate meaningfully.
+*/
+TQWidget* TQFocusData::home()
+{
+ focusWidgets.find(it.current());
+ return focusWidgets.current();
+}
+
+/*!
+ Moves the cursor to the next widget in the focus chain. There is
+ \e always a next widget because the list is a loop.
+*/
+TQWidget* TQFocusData::next()
+{
+ TQWidget* r = focusWidgets.next();
+ if ( !r )
+ r = focusWidgets.first();
+ return r;
+}
+
+/*!
+ Moves the cursor to the previous widget in the focus chain. There
+ is \e always a previous widget because the list is a loop.
+*/
+TQWidget* TQFocusData::prev()
+{
+ TQWidget* r = focusWidgets.prev();
+ if ( !r )
+ r = focusWidgets.last();
+ return r;
+}
+
+/*!
+ Returns the last widget in the focus chain.
+ The cursor is not modified.
+*/
+TQWidget *TQFocusData::last() const
+{
+ return focusWidgets.getLast();
+}
+
+/*!
+ Returns the first widget in the focus chain.
+ The cursor is not modified.
+*/
+TQWidget *TQFocusData::first() const
+{
+ return focusWidgets.getFirst();
+}