/////////////////////////////////////////////////////////////////////////////
/// \file   ProgressEvent.cpp
/// \brief  User event to pass async progress-bar updates to the main window.
/// \author JD Gascuel.
/// \copyright (c) 2015 JD Gascuel. All rights reserved.
/// $Id$
///////////////////////////////////////////////////////////////////////////////
//
// BSD 2-Clause License:
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
//    this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
//////////////////////////////////////////////////////////////////////////////

#include "Utils/ProgressEvent.h"

#include "Utils/Log.h"

#include <QCoreApplication>

///////////////////////////////////////////////////////////////////////////////

QEvent::Type ProgressEvent::_logEventType = QEvent::None;

///////////////////////////////////////////////////////////////////////////////

ProgressEvent::ProgressEvent(int current, int range)
  : QEvent(_logEventType),
    current(current),
    maximum(range)
{}

///////////////////////////////////////////////////////////////////////////////

ProgressEvent* ProgressEvent::make(int current, int range)
{
    if( _logEventType == QEvent::None )
        _logEventType = (QEvent::Type) QEvent::registerEventType();
    return new ProgressEvent(current, range);
}

///////////////////////////////////////////////////////////////////////////////

ProgressManager::ProgressManager()
  : _main(0)
{}

ProgressManager* ProgressManager::getInstance()
{
    static ProgressManager manager;
    return & manager;
}

void ProgressManager::setMainWindow(QObject* main)
{
    _main = main;
    assert(main);
}

void ProgressManager::post(int current, int range)
{
    assert(_main);
    qApp->postEvent(_main, ProgressEvent::make(current, range));
    qApp->processEvents(QEventLoop::ExcludeUserInputEvents, 10);
}