/*
    Copyright (c) 2008 Volker Krause <vkrause@kde.org>

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

    This library 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 Library General Public
    License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to the
    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
    02110-1301, USA.
*/

#ifndef AKONADI_ERROROVERLAY_P_H
#define AKONADI_ERROROVERLAY_P_H

#include "servermanager.h"

#include <QtCore/QPointer>
#include <QtGui/QWidget>

#include <boost/scoped_ptr.hpp>

namespace Ui {
  class ErrorOverlay;
}

namespace Akonadi {

/**
 * @internal
 * Overlay widget to block Akonadi-dependent widgets if the Akonadi server
 * is unavailable.
 * @todo handle initial parent == 0 case correctly, reparent later and hide as long as parent widget is 0
 * @todo fix hiding in dock widget tabs
 */
class ErrorOverlay : public QWidget
{
  Q_OBJECT
  public:
    /**
     * Create an overlay widget for @p baseWidget.
     * @p baseWidget must not be null.
     * @p parent must not be equal to @p baseWidget
     */
    explicit ErrorOverlay( QWidget *baseWidget, QWidget *parent = 0 );
    ~ErrorOverlay();

  protected:
    bool eventFilter( QObject *object, QEvent *event );

  private:
    void reposition();

  private slots:
    void startClicked();
    void quitClicked();
    void selfTestClicked();
    void serverStateChanged( Akonadi::ServerManager::State state );

  private:
    QPointer<QWidget> mBaseWidget;
    bool mPreviousState;
    bool mOverlayActive;
    bool mBaseWidgetIsParent;
    boost::scoped_ptr<Ui::ErrorOverlay> ui;
};

}

#endif
