/****************************************************************************
**
** Copyright (C) 1992-2005 Trolltech AS. All rights reserved.
**
** This file is part of the designer application of the Qt Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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****************************************************************************/

#ifndef TABORDEREDITOR_H
#define TABORDEREDITOR_H

#include "tabordereditor_global.h"

#include <QtCore/QPointer>
#include <QtGui/QPixmap>
#include <QtGui/QWidget>
#include <QtGui/QRegion>
#include <QtGui/QFont>
#include <QtGui/QFontMetrics>

class QtUndoStack;
class AbstractFormWindow;

class QT_TABORDEREDITOR_EXPORT TabOrderEditor : public QWidget
{
    Q_OBJECT

public:
    TabOrderEditor(AbstractFormWindow *form, QWidget *parent);

    AbstractFormWindow *formWindow() const;

public slots:
    void setBackground(QWidget *background);
    void updateBackground();
    void widgetRemoved(QWidget*);
    void initTabOrder();

protected:    
    virtual void paintEvent(QPaintEvent *e);
    virtual void mouseMoveEvent(QMouseEvent *e);
    virtual void mousePressEvent(QMouseEvent *e);
    virtual void mouseDoubleClickEvent(QMouseEvent *e);
    virtual void resizeEvent(QResizeEvent *e);

private:
    QRect indicatorRect(int index) const;
    int widgetIndexAt(const QPoint &pos) const;
    bool skipWidget(QWidget *w) const;

    QPointer<AbstractFormWindow> m_form_window;

    QList<QWidget*> m_tab_order_list;
    
    QWidget *m_bg_widget;
    QtUndoStack *m_undo_stack;
    QPixmap m_bg_pixmap;
    QRegion m_indicator_region;

    QFontMetrics m_font_metrics;
    int m_current_index;
};

#endif
