/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2019- Equinor ASA
//
//  ResInsight 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 3 of the License, or
//  (at your option) any later version.
//
//  ResInsight 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 at <http://www.gnu.org/licenses/gpl.html>
//  for more details.
//
/////////////////////////////////////////////////////////////////////////////////
#include "RiuMdiArea.h"

#include "RiuMainWindow.h"
#include "RiuMdiSubWindow.h"
#include "RiuPlotMainWindow.h"
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::list<QMdiSubWindow*> RiuMdiArea::subWindowListSortedByPosition()
{
    // Tile Windows so the one with the leftmost left edge gets sorted first.
    std::list<QMdiSubWindow*> windowList;
    for ( QMdiSubWindow* subWindow : subWindowList( QMdiArea::CreationOrder ) )
    {
        windowList.push_back( subWindow );
    }

    // Sort of list so we first sort by window position but retain activation order
    // for windows with the same position
    windowList.sort( [this]( QMdiSubWindow* lhs, QMdiSubWindow* rhs ) {
        if ( lhs->frameGeometry().topLeft().rx() == rhs->frameGeometry().topLeft().rx() )
        {
            return lhs->frameGeometry().topLeft().ry() < rhs->frameGeometry().topLeft().ry();
        }
        return lhs->frameGeometry().topLeft().rx() < rhs->frameGeometry().topLeft().rx();
    } );
    return windowList;
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RiuMdiArea::resizeEvent( QResizeEvent* resizeEvent )
{
    if ( subWindowsAreTiled() )
    {
        for ( auto subWindow : subWindowList() )
        {
            auto riuWindow = dynamic_cast<RiuMdiSubWindow*>( subWindow );
            riuWindow->blockTilingChanges( true );
        }

        RiuMainWindowBase* mainWindow = dynamic_cast<RiuMainWindowBase*>( window() );
        mainWindow->setBlockSubWindowActivatedSignal( true );

        // Workaround for Qt bug #51761: https://bugreports.qt.io/browse/QTBUG-51761
        // Set the first window to be the active window then perform resize event and set back.
        auto a = activeSubWindow();
        setActiveSubWindow( subWindowListSortedByPosition().front() );

        QMdiArea::resizeEvent( resizeEvent );
        tileSubWindows();

        setActiveSubWindow( a );

        mainWindow->setBlockSubWindowActivatedSignal( false );

        for ( auto subWindow : subWindowList() )
        {
            auto riuWindow = dynamic_cast<RiuMdiSubWindow*>( subWindow );
            riuWindow->blockTilingChanges( false );
        }
    }
    else
    {
        QMdiArea::resizeEvent( resizeEvent );
    }
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RiuMdiArea::moveEvent( QMoveEvent* event )
{
    for ( auto subWindow : subWindowList() )
    {
        auto riuWindow = dynamic_cast<RiuMdiSubWindow*>( subWindow );
        riuWindow->blockTilingChanges( true );
    }

    QMdiArea::moveEvent( event );

    for ( auto subWindow : subWindowList() )
    {
        auto riuWindow = dynamic_cast<RiuMdiSubWindow*>( subWindow );
        riuWindow->blockTilingChanges( false );
    }
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
bool RiuMdiArea::subWindowsAreTiled() const
{
    RiuMainWindow* mainWindow = dynamic_cast<RiuMainWindow*>( window() );

    if ( mainWindow )
    {
        return mainWindow->subWindowsAreTiled() && subWindowList().size() > 0;
    }
    else
    {
        RiuPlotMainWindow* plotWindow = dynamic_cast<RiuPlotMainWindow*>( window() );
        if ( plotWindow )
        {
            return plotWindow->subWindowsAreTiled() && subWindowList().size() > 0;
        }
    }

    return false;
}