widget_handle.h

/****************************************************************************
 This file is part of ChainLink
 Copyright (C) 2007 Jeremy Magland (Jeremy.Magland@gmail.com)

 ChainLink is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 ChainLink is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with ChainLink; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*****************************************************************************/

//Note: this file is not part of the chainlink_base library,
//but it can be included from ChainLink library files

#ifndef WIDGET_HANDLE_H
#define WIDGET_HANDLE_H

#include <QWidget>

class QWidgetHandle : public QObject {
        Q_OBJECT
public:
        QWidget *widget;
        QWidgetHandle() {
                widget=0;
        }
        virtual ~QWidgetHandle() {
        }

        void setWidget(QWidget *widget_in) {
                if (widget)
                        disconnect(widget);
                widget=widget_in;
                if (!widget) return;
                widget->setAttribute(Qt::WA_DeleteOnClose);
                connect_widget();
        }
        void connect_widget() {
                if (!widget) return;
                connect(widget,SIGNAL(destroyed(QObject *)),this,SLOT(on_widget_destroyed(QObject *)));
        }
        void operator=(QWidgetHandle &H) {
                setWidget(H.widget);
        }

public slots:
        void on_widget_destroyed(QObject *obj) {
                widget=0;
        }
};


#endif

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