#include "pagedworldspacewidget.hpp"

#include <memory>
#include <sstream>

#include <QMouseEvent>
#include <QApplication>

#include <components/esm/loadland.hpp>

#include "../../model/prefs/shortcut.hpp"

#include "../../model/world/tablemimedata.hpp"
#include "../../model/world/idtable.hpp"

#include "../widget/scenetooltoggle2.hpp"
#include "../widget/scenetoolmode.hpp"
#include "../widget/scenetooltoggle2.hpp"

#include "editmode.hpp"
#include "mask.hpp"
#include "cameracontroller.hpp"
#include "cellarrow.hpp"

bool CSVRender::PagedWorldspaceWidget::adjustCells()
{
    bool modified = false;

    const CSMWorld::IdCollection<CSMWorld::Cell>& cells = mDocument.getData().getCells();

    {
        // remove/update
        std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter (mCells.begin());

        while (iter!=mCells.end())
        {
            if (!mSelection.has (iter->first))
            {
                // remove
                delete iter->second;
                mCells.erase (iter++);

                modified = true;
            }
            else
            {
                // update
                int index = cells.searchId (iter->first.getId (mWorldspace));

                bool deleted = index==-1 ||
                    cells.getRecord (index).mState==CSMWorld::RecordBase::State_Deleted;

                if (deleted!=iter->second->isDeleted())
                {
                    modified = true;

                    std::unique_ptr<Cell> cell (new Cell (mDocument.getData(), mRootNode,
                        iter->first.getId (mWorldspace), deleted));

                    delete iter->second;
                    iter->second = cell.release();
                }
                else if (!deleted)
                {
                    // delete state has not changed -> just update

                    // TODO check if name or region field has changed (cell marker)
                    // FIXME: config setting
                    //std::string name = cells.getRecord(index).get().mName;
                    //std::string region = cells.getRecord(index).get().mRegion;

                    modified = true;
                }

                ++iter;
            }
        }
    }

    // add
    for (CSMWorld::CellSelection::Iterator iter (mSelection.begin()); iter!=mSelection.end();
        ++iter)
    {
        if (mCells.find (*iter)==mCells.end())
        {
            addCellToScene (*iter);
            modified = true;
        }
    }

    if (modified)
    {
        for (std::map<CSMWorld::CellCoordinates, Cell *>::const_iterator iter (mCells.begin());
            iter!=mCells.end(); ++iter)
        {
            int mask = 0;

            for (int i=CellArrow::Direction_North; i<=CellArrow::Direction_East; i *= 2)
            {
                CSMWorld::CellCoordinates coordinates (iter->second->getCoordinates());

                switch (i)
                {
                    case CellArrow::Direction_North: coordinates = coordinates.move (0, 1); break;
                    case CellArrow::Direction_West: coordinates = coordinates.move (-1, 0); break;
                    case CellArrow::Direction_South: coordinates = coordinates.move (0, -1); break;
                    case CellArrow::Direction_East: coordinates = coordinates.move (1, 0); break;
                }

                if (!mSelection.has (coordinates))
                    mask |= i;
            }

            iter->second->setCellArrows (mask);
        }
    }

    return modified;
}

void CSVRender::PagedWorldspaceWidget::addVisibilitySelectorButtons (
    CSVWidget::SceneToolToggle2 *tool)
{
    WorldspaceWidget::addVisibilitySelectorButtons (tool);
    tool->addButton (Button_Terrain, Mask_Terrain, "Terrain");
    tool->addButton (Button_Fog, Mask_Fog, "Fog", "", true);
}

void CSVRender::PagedWorldspaceWidget::addEditModeSelectorButtons (
    CSVWidget::SceneToolMode *tool)
{
    WorldspaceWidget::addEditModeSelectorButtons (tool);

    /// \todo replace EditMode with suitable subclasses
    tool->addButton (
        new EditMode (this, QIcon (":placeholder"), Mask_Reference, "Terrain shape editing"),
        "terrain-shape");
    tool->addButton (
        new EditMode (this, QIcon (":placeholder"), Mask_Reference, "Terrain texture editing"),
        "terrain-texture");
    tool->addButton (
        new EditMode (this, QIcon (":placeholder"), Mask_Reference, "Terrain vertex paint editing"),
        "terrain-vertex");
    tool->addButton (
        new EditMode (this, QIcon (":placeholder"), Mask_Reference, "Terrain movement"),
        "terrain-move");
}

void CSVRender::PagedWorldspaceWidget::handleInteractionPress (const WorldspaceHitResult& hit, InteractionType type)
{
    if (hit.tag && hit.tag->getMask()==Mask_CellArrow)
    {
        if (CellArrowTag *cellArrowTag = dynamic_cast<CSVRender::CellArrowTag *> (hit.tag.get()))
        {
            CellArrow *arrow = cellArrowTag->getCellArrow();

            CSMWorld::CellCoordinates coordinates = arrow->getCoordinates();

            CellArrow::Direction direction = arrow->getDirection();

            int x = 0;
            int y = 0;

            switch (direction)
            {
                case CellArrow::Direction_North: y = 1; break;
                case CellArrow::Direction_West: x = -1; break;
                case CellArrow::Direction_South: y = -1; break;
                case CellArrow::Direction_East: x = 1; break;
            }

            bool modified = false;

            if (type == InteractionType_PrimarySelect)
            {
                addCellSelection (x, y);
                modified = true;
            }
            else if (type == InteractionType_SecondarySelect)
            {
                moveCellSelection (x, y);
                modified = true;
            }
            else // Primary/SecondaryEdit
            {
                CSMWorld::CellCoordinates newCoordinates = coordinates.move (x, y);

                if (mCells.find (newCoordinates)==mCells.end())
                {
                    addCellToScene (newCoordinates);
                    mSelection.add (newCoordinates);
                    modified = true;
                }

                if (type == InteractionType_SecondaryEdit)
                {
                    if (mCells.find (coordinates)!=mCells.end())
                    {
                        removeCellFromScene (coordinates);
                        mSelection.remove (coordinates);
                        modified = true;
                    }
                }
            }

            if (modified)
                adjustCells();

            return;
        }
    }

    WorldspaceWidget::handleInteractionPress (hit, type);
}

void CSVRender::PagedWorldspaceWidget::referenceableDataChanged (const QModelIndex& topLeft,
    const QModelIndex& bottomRight)
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter (mCells.begin());
        iter!=mCells.end(); ++iter)
        if (iter->second->referenceableDataChanged (topLeft, bottomRight))
            flagAsModified();
}

void CSVRender::PagedWorldspaceWidget::referenceableAboutToBeRemoved (
    const QModelIndex& parent, int start, int end)
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter (mCells.begin());
        iter!=mCells.end(); ++iter)
        if (iter->second->referenceableAboutToBeRemoved (parent, start, end))
            flagAsModified();
}

void CSVRender::PagedWorldspaceWidget::referenceableAdded (const QModelIndex& parent,
    int start, int end)
{
    CSMWorld::IdTable& referenceables = dynamic_cast<CSMWorld::IdTable&> (
        *mDocument.getData().getTableModel (CSMWorld::UniversalId::Type_Referenceables));

    for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter (mCells.begin());
        iter!=mCells.end(); ++iter)
    {
        QModelIndex topLeft = referenceables.index (start, 0);
        QModelIndex bottomRight =
            referenceables.index (end, referenceables.columnCount());

        if (iter->second->referenceableDataChanged (topLeft, bottomRight))
            flagAsModified();
    }
}

void CSVRender::PagedWorldspaceWidget::referenceDataChanged (const QModelIndex& topLeft,
    const QModelIndex& bottomRight)
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter (mCells.begin());
        iter!=mCells.end(); ++iter)
        if (iter->second->referenceDataChanged (topLeft, bottomRight))
            flagAsModified();
}

void CSVRender::PagedWorldspaceWidget::referenceAboutToBeRemoved (const QModelIndex& parent,
    int start, int end)
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter (mCells.begin());
        iter!=mCells.end(); ++iter)
        if (iter->second->referenceAboutToBeRemoved (parent, start, end))
            flagAsModified();
}

void CSVRender::PagedWorldspaceWidget::referenceAdded (const QModelIndex& parent, int start,
    int end)
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter (mCells.begin());
        iter!=mCells.end(); ++iter)
        if (iter->second->referenceAdded (parent, start, end))
            flagAsModified();
}

void CSVRender::PagedWorldspaceWidget::pathgridDataChanged (const QModelIndex& topLeft, const QModelIndex& bottomRight)
{
    const CSMWorld::SubCellCollection<CSMWorld::Pathgrid>& pathgrids = mDocument.getData().getPathgrids();

    int rowStart = -1;
    int rowEnd = -1;

    if (topLeft.parent().isValid())
    {
        rowStart = topLeft.parent().row();
        rowEnd = bottomRight.parent().row();
    }
    else
    {
        rowStart = topLeft.row();
        rowEnd = bottomRight.row();
    }

    for (int row = rowStart; row <= rowEnd; ++row)
    {
        const CSMWorld::Pathgrid& pathgrid = pathgrids.getRecord(row).get();
        CSMWorld::CellCoordinates coords = CSMWorld::CellCoordinates(pathgrid.mData.mX, pathgrid.mData.mY);

        std::map<CSMWorld::CellCoordinates, Cell*>::iterator searchResult = mCells.find(coords);
        if (searchResult != mCells.end())
        {
            searchResult->second->pathgridModified();
            flagAsModified();
        }
    }
}

void CSVRender::PagedWorldspaceWidget::pathgridAboutToBeRemoved (const QModelIndex& parent, int start, int end)
{
    const CSMWorld::SubCellCollection<CSMWorld::Pathgrid>& pathgrids = mDocument.getData().getPathgrids();

    if (!parent.isValid())
    {
        // Pathgrid going to be deleted
        for (int row = start; row <= end; ++row)
        {
            const CSMWorld::Pathgrid& pathgrid = pathgrids.getRecord(row).get();
            CSMWorld::CellCoordinates coords = CSMWorld::CellCoordinates(pathgrid.mData.mX, pathgrid.mData.mY);

            std::map<CSMWorld::CellCoordinates, Cell*>::iterator searchResult = mCells.find(coords);
            if (searchResult != mCells.end())
            {
                searchResult->second->pathgridRemoved();
                flagAsModified();
            }
        }
    }
}

void CSVRender::PagedWorldspaceWidget::pathgridAdded(const QModelIndex& parent, int start, int end)
{
   const CSMWorld::SubCellCollection<CSMWorld::Pathgrid>& pathgrids = mDocument.getData().getPathgrids();

    if (!parent.isValid())
    {
        for (int row = start; row <= end; ++row)
        {
            const CSMWorld::Pathgrid& pathgrid = pathgrids.getRecord(row).get();
            CSMWorld::CellCoordinates coords = CSMWorld::CellCoordinates(pathgrid.mData.mX, pathgrid.mData.mY);

            std::map<CSMWorld::CellCoordinates, Cell*>::iterator searchResult = mCells.find(coords);
            if (searchResult != mCells.end())
            {
                searchResult->second->pathgridModified();
                flagAsModified();
            }
        }
    }
}


std::string CSVRender::PagedWorldspaceWidget::getStartupInstruction()
{
    osg::Vec3d eye, center, up;
    mView->getCamera()->getViewMatrixAsLookAt(eye, center, up);
    osg::Vec3d position = eye;

    std::ostringstream stream;

    stream
        << "player->position "
        << position.x() << ", " << position.y() << ", " << position.z()
        << ", 0";

    return stream.str();
}

void CSVRender::PagedWorldspaceWidget::addCellToScene (
    const CSMWorld::CellCoordinates& coordinates)
{
    const CSMWorld::IdCollection<CSMWorld::Cell>& cells = mDocument.getData().getCells();

    int index = cells.searchId (coordinates.getId (mWorldspace));

    bool deleted = index==-1 ||
        cells.getRecord (index).mState==CSMWorld::RecordBase::State_Deleted;

    std::unique_ptr<Cell> cell (
        new Cell (mDocument.getData(), mRootNode, coordinates.getId (mWorldspace),
        deleted));
    EditMode *editMode = getEditMode();
    cell->setSubMode (editMode->getSubMode(), editMode->getInteractionMask());

    mCells.insert (std::make_pair (coordinates, cell.release()));
}

void CSVRender::PagedWorldspaceWidget::removeCellFromScene (
    const CSMWorld::CellCoordinates& coordinates)
{
    std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter = mCells.find (coordinates);

    if (iter!=mCells.end())
    {
        delete iter->second;
        mCells.erase (iter);
    }
}

void CSVRender::PagedWorldspaceWidget::addCellSelection (int x, int y)
{
    CSMWorld::CellSelection newSelection = mSelection;
    newSelection.move (x, y);

    for (CSMWorld::CellSelection::Iterator iter (newSelection.begin()); iter!=newSelection.end();
        ++iter)
    {
        if (mCells.find (*iter)==mCells.end())
        {
            addCellToScene (*iter);
            mSelection.add (*iter);
        }
    }
}

void CSVRender::PagedWorldspaceWidget::moveCellSelection (int x, int y)
{
    CSMWorld::CellSelection newSelection = mSelection;
    newSelection.move (x, y);

    for (CSMWorld::CellSelection::Iterator iter (mSelection.begin()); iter!=mSelection.end();
        ++iter)
    {
        if (!newSelection.has (*iter))
            removeCellFromScene (*iter);
    }

    for (CSMWorld::CellSelection::Iterator iter (newSelection.begin()); iter!=newSelection.end();
        ++iter)
    {
        if (!mSelection.has (*iter))
            addCellToScene (*iter);
    }

    mSelection = newSelection;
}

void CSVRender::PagedWorldspaceWidget::addCellToSceneFromCamera (int offsetX, int offsetY)
{
    const int CellSize = 8192;

    osg::Vec3f eye, center, up;
    getCamera()->getViewMatrixAsLookAt(eye, center, up);

    int cellX = (int)std::floor(center.x() / CellSize) + offsetX;
    int cellY = (int)std::floor(center.y() / CellSize) + offsetY;

    CSMWorld::CellCoordinates cellCoordinates(cellX, cellY);

    if (!mSelection.has(cellCoordinates))
    {
        addCellToScene(cellCoordinates);
        mSelection.add(cellCoordinates);

        adjustCells();
    }
}

CSVRender::PagedWorldspaceWidget::PagedWorldspaceWidget (QWidget* parent, CSMDoc::Document& document)
: WorldspaceWidget (document, parent), mDocument (document), mWorldspace ("std::default"),
  mControlElements(NULL), mDisplayCellCoord(true)
{
    QAbstractItemModel *cells =
        document.getData().getTableModel (CSMWorld::UniversalId::Type_Cells);

    connect (cells, SIGNAL (dataChanged (const QModelIndex&, const QModelIndex&)),
        this, SLOT (cellDataChanged (const QModelIndex&, const QModelIndex&)));
    connect (cells, SIGNAL (rowsRemoved (const QModelIndex&, int, int)),
        this, SLOT (cellRemoved (const QModelIndex&, int, int)));
    connect (cells, SIGNAL (rowsInserted (const QModelIndex&, int, int)),
        this, SLOT (cellAdded (const QModelIndex&, int, int)));

    // Shortcuts
    CSMPrefs::Shortcut* loadCameraCellShortcut = new CSMPrefs::Shortcut("scene-load-cam-cell", this);
    connect(loadCameraCellShortcut, SIGNAL(activated()), this, SLOT(loadCameraCell()));

    CSMPrefs::Shortcut* loadCameraEastCellShortcut = new CSMPrefs::Shortcut("scene-load-cam-eastcell", this);
    connect(loadCameraEastCellShortcut, SIGNAL(activated()), this, SLOT(loadEastCell()));

    CSMPrefs::Shortcut* loadCameraNorthCellShortcut = new CSMPrefs::Shortcut("scene-load-cam-northcell", this);
    connect(loadCameraNorthCellShortcut, SIGNAL(activated()), this, SLOT(loadNorthCell()));

    CSMPrefs::Shortcut* loadCameraWestCellShortcut = new CSMPrefs::Shortcut("scene-load-cam-westcell", this);
    connect(loadCameraWestCellShortcut, SIGNAL(activated()), this, SLOT(loadWestCell()));

    CSMPrefs::Shortcut* loadCameraSouthCellShortcut = new CSMPrefs::Shortcut("scene-load-cam-southcell", this);
    connect(loadCameraSouthCellShortcut, SIGNAL(activated()), this, SLOT(loadSouthCell()));
}

CSVRender::PagedWorldspaceWidget::~PagedWorldspaceWidget()
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter (mCells.begin());
        iter!=mCells.end(); ++iter)
    {
        delete iter->second;
    }
}

void CSVRender::PagedWorldspaceWidget::useViewHint (const std::string& hint)
{
    if (!hint.empty())
    {
        CSMWorld::CellSelection selection;

        if (hint[0]=='c')
        {
            // syntax: c:#x1 y1; #x2 y2 (number of coordinate pairs can be 0 or larger)
            char ignore;

            std::istringstream stream (hint.c_str());
            if (stream >> ignore)
            {
                char ignore1; // : or ;
                char ignore2; // #
                // Current coordinate
                int x, y;

                // Loop through all the coordinates to add them to selection
                while (stream >> ignore1 >> ignore2 >> x >> y)
                    selection.add (CSMWorld::CellCoordinates (x, y));
                               
                // Mark that camera needs setup
                mCamPositionSet=false;
            }
        }
        else if (hint[0]=='r')
        {
            /// \todo implement 'r' type hints
        }

        setCellSelection (selection);
    }
}

void CSVRender::PagedWorldspaceWidget::setCellSelection (const CSMWorld::CellSelection& selection)
{
    mSelection = selection;

    if (adjustCells())
        flagAsModified();

    emit cellSelectionChanged (mSelection);
}

const CSMWorld::CellSelection& CSVRender::PagedWorldspaceWidget::getCellSelection() const
{
    return mSelection;
}

std::pair< int, int > CSVRender::PagedWorldspaceWidget::getCoordinatesFromId (const std::string& record) const
{
    std::istringstream stream (record.c_str());
    char ignore;
    int x, y;
    stream >> ignore >> x >> y;
    return std::make_pair(x, y);
}

bool CSVRender::PagedWorldspaceWidget::handleDrop (
    const std::vector< CSMWorld::UniversalId >& universalIdData, DropType type)
{
    if (WorldspaceWidget::handleDrop (universalIdData, type))
        return true;

    if (type!=Type_CellsExterior)
        return false;

    bool selectionChanged = false;
    for (unsigned i = 0; i < universalIdData.size(); ++i)
    {
        std::pair<int, int> coordinates(getCoordinatesFromId(universalIdData[i].getId()));
        if (mSelection.add(CSMWorld::CellCoordinates(coordinates.first, coordinates.second)))
        {
            selectionChanged = true;
        }
    }
    if (selectionChanged)
    {
        if (adjustCells())
            flagAsModified();

        emit cellSelectionChanged(mSelection);
    }

    return true;
}

CSVRender::WorldspaceWidget::dropRequirments CSVRender::PagedWorldspaceWidget::getDropRequirements (CSVRender::WorldspaceWidget::DropType type) const
{
    dropRequirments requirements = WorldspaceWidget::getDropRequirements (type);

    if (requirements!=ignored)
        return requirements;

    switch (type)
    {
        case Type_CellsExterior:
            return canHandle;

        case Type_CellsInterior:
            return needUnpaged;

        default:
            return ignored;
    }
}

unsigned int CSVRender::PagedWorldspaceWidget::getVisibilityMask() const
{
    return WorldspaceWidget::getVisibilityMask() | mControlElements->getSelectionMask();
}

void CSVRender::PagedWorldspaceWidget::clearSelection (int elementMask)
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter = mCells.begin();
        iter!=mCells.end(); ++iter)
        iter->second->setSelection (elementMask, Cell::Selection_Clear);

    flagAsModified();
}

void CSVRender::PagedWorldspaceWidget::invertSelection (int elementMask)
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter = mCells.begin();
        iter!=mCells.end(); ++iter)
        iter->second->setSelection (elementMask, Cell::Selection_Invert);

    flagAsModified();
}

void CSVRender::PagedWorldspaceWidget::selectAll (int elementMask)
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter = mCells.begin();
        iter!=mCells.end(); ++iter)
        iter->second->setSelection (elementMask, Cell::Selection_All);

    flagAsModified();
}

void CSVRender::PagedWorldspaceWidget::selectAllWithSameParentId (int elementMask)
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter = mCells.begin();
        iter!=mCells.end(); ++iter)
        iter->second->selectAllWithSameParentId (elementMask);

    flagAsModified();
}

std::string CSVRender::PagedWorldspaceWidget::getCellId (const osg::Vec3f& point) const
{
    const int cellSize = 8192;

    CSMWorld::CellCoordinates cellCoordinates (
        static_cast<int> (std::floor (point.x()/cellSize)),
        static_cast<int> (std::floor (point.y()/cellSize)));

    return cellCoordinates.getId (mWorldspace);
}

CSVRender::Cell* CSVRender::PagedWorldspaceWidget::getCell(const osg::Vec3d& point) const
{
    const int cellSize = 8192;

    CSMWorld::CellCoordinates coords(
        static_cast<int> (std::floor (point.x()/cellSize)),
        static_cast<int> (std::floor (point.y()/cellSize)));

    std::map<CSMWorld::CellCoordinates, Cell*>::const_iterator searchResult = mCells.find(coords);
    if (searchResult != mCells.end())
        return searchResult->second;
    else
        return 0;
}

std::vector<osg::ref_ptr<CSVRender::TagBase> > CSVRender::PagedWorldspaceWidget::getSelection (
    unsigned int elementMask) const
{
    std::vector<osg::ref_ptr<CSVRender::TagBase> > result;

    for (std::map<CSMWorld::CellCoordinates, Cell *>::const_iterator iter = mCells.begin();
        iter!=mCells.end(); ++iter)
    {
        std::vector<osg::ref_ptr<CSVRender::TagBase> > cellResult =
            iter->second->getSelection (elementMask);

        result.insert (result.end(), cellResult.begin(), cellResult.end());
    }

    return result;
}

std::vector<osg::ref_ptr<CSVRender::TagBase> > CSVRender::PagedWorldspaceWidget::getEdited (
    unsigned int elementMask) const
{
    std::vector<osg::ref_ptr<CSVRender::TagBase> > result;

    for (std::map<CSMWorld::CellCoordinates, Cell *>::const_iterator iter = mCells.begin();
        iter!=mCells.end(); ++iter)
    {
        std::vector<osg::ref_ptr<CSVRender::TagBase> > cellResult =
            iter->second->getEdited (elementMask);

        result.insert (result.end(), cellResult.begin(), cellResult.end());
    }

    return result;
}

void CSVRender::PagedWorldspaceWidget::setSubMode (int subMode, unsigned int elementMask)
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::const_iterator iter = mCells.begin();
        iter!=mCells.end(); ++iter)
        iter->second->setSubMode (subMode, elementMask);
}

void CSVRender::PagedWorldspaceWidget::reset (unsigned int elementMask)
{
    for (std::map<CSMWorld::CellCoordinates, Cell *>::const_iterator iter = mCells.begin();
        iter!=mCells.end(); ++iter)
        iter->second->reset (elementMask);
}

CSVWidget::SceneToolToggle2 *CSVRender::PagedWorldspaceWidget::makeControlVisibilitySelector (
    CSVWidget::SceneToolbar *parent)
{
    mControlElements = new CSVWidget::SceneToolToggle2 (parent,
        "Controls & Guides Visibility", ":scenetoolbar/scene-view-marker-c", ":scenetoolbar/scene-view-marker-");

    mControlElements->addButton (1, Mask_CellMarker, "Cell Marker");
    mControlElements->addButton (2, Mask_CellArrow, "Cell Arrows");
    mControlElements->addButton (4, Mask_CellBorder, "Cell Border");

    mControlElements->setSelectionMask (0xffffffff);

    connect (mControlElements, SIGNAL (selectionChanged()),
        this, SLOT (elementSelectionChanged()));

    return mControlElements;
}

void CSVRender::PagedWorldspaceWidget::cellDataChanged (const QModelIndex& topLeft,
    const QModelIndex& bottomRight)
{
    /// \todo check if no selected cell is affected and do not update, if that is the case
    if (adjustCells())
        flagAsModified();
}

void CSVRender::PagedWorldspaceWidget::cellRemoved (const QModelIndex& parent, int start,
    int end)
{
    if (adjustCells())
        flagAsModified();
}

void CSVRender::PagedWorldspaceWidget::cellAdded (const QModelIndex& index, int start,
    int end)
{
    /// \todo check if no selected cell is affected and do not update, if that is the case
    if (adjustCells())
        flagAsModified();
}

void CSVRender::PagedWorldspaceWidget::loadCameraCell()
{
    addCellToSceneFromCamera(0, 0);
}

void CSVRender::PagedWorldspaceWidget::loadEastCell()
{
    addCellToSceneFromCamera(1, 0);
}

void CSVRender::PagedWorldspaceWidget::loadNorthCell()
{
    addCellToSceneFromCamera(0, 1);
}

void CSVRender::PagedWorldspaceWidget::loadWestCell()
{
    addCellToSceneFromCamera(-1, 0);
}

void CSVRender::PagedWorldspaceWidget::loadSouthCell()
{
    addCellToSceneFromCamera(0, -1);
}