/* This file is part of the KDE project
  Copyright (C) 2007 - 2009, 2012 Dag Andersen <danders@get2net.dk>

  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.
*/

#include "taskworkpackageview.h"
#include "taskworkpackagemodel.h"
#include "workpackage.h"

#include "part.h"
#include "kptglobal.h"
#include "kptcommand.h"
#include "kptproject.h"
#include "kptschedule.h"
#include "kpteffortcostmap.h"
#include "kptitemviewsettup.h"
#include "planworksettings.h"

#include "kdganttgraphicsview.h"
#include "kdgantttreeviewrowcontroller.h"
#include "kdganttproxymodel.h"
#include "kdganttdatetimegrid.h"
#include "kdganttstyleoptionganttitem.h"

#include <KoIcon.h>

#include <QDragMoveEvent>
#include <QMenu>
#include <QModelIndex>
#include <QWidget>
#include <QSortFilterProxyModel>
#include <QHeaderView>
#include <QPointer>

#include <kaction.h>
#include <kglobal.h>
#include <klocale.h>
#include <ktoggleaction.h>
#include <kactionmenu.h>
#include <kstandardaction.h>
#include <kstandardshortcut.h>
#include <kaccelgen.h>
#include <kactioncollection.h>

#include "debugarea.h"

using namespace KPlato;

namespace KPlatoWork
{


TaskWorkPackageTreeView::TaskWorkPackageTreeView( Part *part, QWidget *parent )
    : DoubleTreeViewBase( parent )
{
    setContextMenuPolicy( Qt::CustomContextMenu );
    masterView()->header()->setSortIndicatorShown( true );
    masterView()->header()->setClickable( true );
    slaveView()->header()->setSortIndicatorShown( true );
    slaveView()->header()->setClickable( true );

    QSortFilterProxyModel *sf = new QSortFilterProxyModel( this );
    TaskWorkPackageModel *m = new TaskWorkPackageModel( part, sf );
    sf->setSourceModel( m );
    setModel( sf );
    //setSelectionBehavior( QAbstractItemView::SelectItems );
    setSelectionMode( QAbstractItemView::SingleSelection );
    setStretchLastSection( false );

    createItemDelegates( m );

    QList<int> list1; list1 << 2 << -1; // display column 0 and 1 (NodeName and NodeType ) in left view
    masterView()->setDefaultColumns( QList<int>() << 0 << 1 );
    QList<int> show;
    show << TaskWorkPackageModel::NodeCompleted
            << TaskWorkPackageModel::NodeActualEffort
            << TaskWorkPackageModel::NodeRemainingEffort
            << TaskWorkPackageModel::NodePlannedEffort
            << TaskWorkPackageModel::NodeStartTime
            << TaskWorkPackageModel::NodeActualStart
            << TaskWorkPackageModel::NodeEndTime
            << TaskWorkPackageModel::NodeActualFinish
            << TaskWorkPackageModel::ProjectName
            << TaskWorkPackageModel::ProjectManager;

    QList<int> list2;
    for ( int i = 0; i < m->columnCount(); ++i ) {
        if ( ! show.contains( i ) ) {
            list2 << i;
        }
    }
    hideColumns( list1, list2 );
    slaveView()->setDefaultColumns( show );
    masterView()->setFocus();

    kDebug(planworkDbg())<<PlanWorkSettings::self()->taskWorkPackageView();
    masterView()->header()->setClickable( true );
    slaveView()->header()->setSortIndicatorShown( true );

    connect(masterView()->header(), SIGNAL(sortIndicatorChanged(int,Qt::SortOrder)), SLOT(setSortOrder(int,Qt::SortOrder)));
    connect(slaveView()->header(), SIGNAL(sortIndicatorChanged(int,Qt::SortOrder)), SLOT(setSortOrder(int,Qt::SortOrder)));

    masterView()->header()->setSortIndicator( TaskWorkPackageModel::NodeType, Qt::AscendingOrder );

    connect(masterView()->header(), SIGNAL(sectionMoved(int,int,int)), SIGNAL(sectionsMoved()));
    connect(slaveView()->header(), SIGNAL(sectionMoved(int,int,int)), SIGNAL(sectionsMoved()));
}

void TaskWorkPackageTreeView::setSortOrder( int col, Qt::SortOrder order )
{
    model()->sort( col, order );
}

TaskWorkPackageModel *TaskWorkPackageTreeView::itemModel() const
{
    return static_cast<TaskWorkPackageModel*>( static_cast<QSortFilterProxyModel*>( model() )->sourceModel() );
}

Project *TaskWorkPackageTreeView::project() const
{
    return itemModel()->project();
}

Document *TaskWorkPackageTreeView::currentDocument() const
{
    QSortFilterProxyModel *sf = qobject_cast<QSortFilterProxyModel*>( model() );
    Q_ASSERT( sf );
    if ( sf == 0 ) {
        return 0;
    }
    return itemModel()->documentForIndex( sf->mapToSource(  selectionModel()->currentIndex() ) );
}

Node *TaskWorkPackageTreeView::currentNode() const
{
    QSortFilterProxyModel *sf = qobject_cast<QSortFilterProxyModel*>( model() );
    Q_ASSERT( sf );
    if ( sf == 0 ) {
        return 0;
    }
    return itemModel()->nodeForIndex( sf->mapToSource(  selectionModel()->currentIndex() ) );
}

QList<Node*> TaskWorkPackageTreeView::selectedNodes() const
{
    QList<Node*> lst;
    QSortFilterProxyModel *sf = qobject_cast<QSortFilterProxyModel*>( model() );
    Q_ASSERT( sf );
    if ( sf == 0 ) {
        return lst;
    }
    foreach( const QModelIndex &idx, selectionModel()->selectedIndexes() ) {
        QModelIndex i = sf->mapToSource( idx );
        Q_ASSERT( i.isValid() && i.model() == itemModel() );
        Node *n = itemModel()->nodeForIndex( i );
        if ( n && ! lst.contains( n ) ) {
            lst << n;
        }
    }
    return lst;
}

void TaskWorkPackageTreeView::setProject( Project *project )
{
    itemModel()->setProject( project );
}

void TaskWorkPackageTreeView::slotActivated( const QModelIndex &index )
{
    kDebug(planworkDbg())<<index.column();
}

void TaskWorkPackageTreeView::dragMoveEvent(QDragMoveEvent */*event*/)
{
/*    if (dragDropMode() == InternalMove
        && (event->source() != this || !(event->possibleActions() & Qt::MoveAction)))
        return;

    TreeViewBase::dragMoveEvent( event );
    if ( ! event->isAccepted() ) {
        return;
    }
    //QTreeView thinks it's ok to drop
    event->ignore();
    QModelIndex index = indexAt( event->pos() );
    if ( ! index.isValid() ) {
        event->accept();
        return; // always ok to drop on main project
    }
    Node *dn = model()->node( index );
    if ( dn == 0 ) {
        kError()<<"no node to drop on!"
        return; // hmmm
    }
    switch ( dropIndicatorPosition() ) {
        case AboveItem:
        case BelowItem:
            //dn == sibling
            if ( model()->dropAllowed( dn->parentNode(), event->mimeData() ) ) {
                event->accept();
            }
            break;
        case OnItem:
            //dn == new parent
            if ( model()->dropAllowed( dn, event->mimeData() ) ) {
                event->accept();
            }
            break;
        default:
            break;
    }*/
}


//-----------------------------------
AbstractView::AbstractView( Part *part, QWidget *parent )
    : QWidget( parent ),
      m_part( part )
{
}

void AbstractView::updateReadWrite( bool /*rw*/ )
{
}

QList<Node*> AbstractView::selectedNodes() const
{
    return QList<Node*>();
}

Node *AbstractView::currentNode() const
{
    return 0;
}

Document *AbstractView::currentDocument() const
{
    return 0;
}


void AbstractView::slotHeaderContextMenuRequested( const QPoint &pos )
{
    kDebug(planworkDbg());
    QList<QAction*> lst = contextActionList();
    if ( ! lst.isEmpty() ) {
        QMenu::exec( lst, pos, lst.first() );
    }
}

void AbstractView::slotContextMenuRequested( const QModelIndex &/*index*/, const QPoint& pos )
{
    return slotHeaderContextMenuRequested( pos );
}

void AbstractView::slotContextMenuRequested( Node *node, const QPoint& pos )
{
    kDebug(planworkDbg())<<node->name()<<" :"<<pos;
    QString name;
    switch ( node->type() ) {
        case Node::Type_Task:
            name = "taskstatus_popup";
            break;
        case Node::Type_Milestone:
            name = "taskview_milestone_popup";
            break;
        case Node::Type_Summarytask:
            name = "taskview_summary_popup";
            break;
        default:
            break;
    }
    kDebug(planworkDbg())<<name;
    if ( name.isEmpty() ) {
        slotHeaderContextMenuRequested( pos );
        return;
    }
    emit requestPopupMenu( name, pos );
}

void AbstractView::slotContextMenuRequested( Document *doc, const QPoint& pos )
{
    kDebug(planworkDbg())<<doc->url()<<" :"<<pos;
    QString name;
    switch ( doc->type() ) {
        case Document::Type_Product:
            name = "editdocument_popup";
            break;
        default:
            name = "viewdocument_popup";
            break;
    }
    kDebug(planworkDbg())<<name;
    if ( name.isEmpty() ) {
        slotHeaderContextMenuRequested( pos );
        return;
    }
    emit requestPopupMenu( name, pos );
}

void AbstractView::sectionsMoved()
{
    saveContext();
}

bool AbstractView::loadContext()
{
    return true;
}

void AbstractView::saveContext()
{
}

KoPrintJob *AbstractView::createPrintJob()
{
    return 0;
}

//-----------------------------------
TaskWorkPackageView::TaskWorkPackageView( Part *part, QWidget *parent )
    : AbstractView( part, parent )
{
    kDebug(planworkDbg())<<"-------------------- creating TaskWorkPackageView -------------------";
    QVBoxLayout * l = new QVBoxLayout( this );
    l->setMargin( 0 );
    m_view = new TaskWorkPackageTreeView( part, this );
    l->addWidget( m_view );
    setupGui();

    connect( itemModel(), SIGNAL(executeCommand(KUndo2Command*)), part, SLOT(addCommand(KUndo2Command*)) );

    connect( m_view, SIGNAL(contextMenuRequested(QModelIndex,QPoint)), SLOT(slotContextMenuRequested(QModelIndex,QPoint)) );

    connect( m_view, SIGNAL(headerContextMenuRequested(QPoint)), SLOT(slotHeaderContextMenuRequested(QPoint)) );

    connect( m_view, SIGNAL(selectionChanged(QModelIndexList)), SLOT(slotSelectionChanged(QModelIndexList)) );

    loadContext();

    connect(m_view, SIGNAL(sectionsMoved()), SLOT(sectionsMoved()));
}

void TaskWorkPackageView::updateReadWrite( bool rw )
{
    m_view->setReadWrite( rw );
}

void TaskWorkPackageView::slotSelectionChanged( const QModelIndexList &/*lst*/ )
{
    emit selectionChanged();
}

QList<Node*> TaskWorkPackageView::selectedNodes() const
{
    return m_view->selectedNodes();
}

Node *TaskWorkPackageView::currentNode() const
{
    return m_view->currentNode();
}

Document *TaskWorkPackageView::currentDocument() const
{
    return m_view->currentDocument();
}

void TaskWorkPackageView::slotContextMenuRequested( const QModelIndex &index, const QPoint& pos )
{
    kDebug(planworkDbg())<<index<<pos;
    if ( ! index.isValid() ) {
        slotHeaderContextMenuRequested( pos );
        return;
    }
    QSortFilterProxyModel *sf = qobject_cast<QSortFilterProxyModel*>( m_view->model() );
    Q_ASSERT( sf );
    if ( sf == 0 ) {
        return;
    }
    QModelIndex idx = sf->mapToSource( index );
    if ( ! idx.isValid() ) {
        slotHeaderContextMenuRequested( pos );
        return;
    }

    Node *node = itemModel()->nodeForIndex( idx );
    if ( node ) {
        return slotContextMenuRequested( node, pos );
    }
    Document *doc = itemModel()->documentForIndex( idx );
    if ( doc ) {
        return slotContextMenuRequested( doc, pos );
    }
    return slotHeaderContextMenuRequested( pos );
}

void TaskWorkPackageView::setupGui()
{
    // Add the context menu actions for the view options
    connect(m_view->actionSplitView(), SIGNAL(triggered(bool)), SLOT(slotSplitView()));
    addContextAction( m_view->actionSplitView() );

    actionOptions = new KAction(koIcon("configure"), i18n("Configure View..."), this);
    connect(actionOptions, SIGNAL(triggered(bool)), SLOT(slotOptions()));
    addContextAction( actionOptions );
}

void TaskWorkPackageView::slotSplitView()
{
    kDebug(planworkDbg());
    m_view->setViewSplitMode( ! m_view->isViewSplit() );
    saveContext();
}


void TaskWorkPackageView::slotOptions()
{
    kDebug(planworkDbg());
    QPointer<SplitItemViewSettupDialog> dlg = new SplitItemViewSettupDialog( 0, m_view, this );
    dlg->exec();
    delete dlg;
    saveContext();
}

bool TaskWorkPackageView::loadContext()
{
    KoXmlDocument doc;
    doc.setContent( PlanWorkSettings::self()->taskWorkPackageView() );
    KoXmlElement context = doc.namedItem( "TaskWorkPackageViewSettings" ).toElement();
    if ( context.isNull() ) {
        kDebug(planworkDbg())<<"No settings";
        return false;
    }
    return m_view->loadContext( itemModel()->columnMap(), context );
}

void TaskWorkPackageView::saveContext()
{
    QDomDocument doc ( "TaskWorkPackageView" );
    QDomElement context = doc.createElement( "TaskWorkPackageViewSettings" );
    doc.appendChild( context );
    m_view->saveContext( itemModel()->columnMap(), context );
    PlanWorkSettings::self()->setTaskWorkPackageView( doc.toString() );
    PlanWorkSettings::self()->writeConfig();
    kDebug(planworkDbg())<<endl<<doc.toString();
}

//-------------------------------------------
GanttItemDelegate::GanttItemDelegate( QObject *parent )
    : KPlato::GanttItemDelegate( parent )
{
    showResources = false;
    showTaskName = true;
    showTaskLinks = false;
    showProgress = true;
    showPositiveFloat = false;
    showNegativeFloat = false;
    showCriticalPath = false;
    showCriticalTasks = false;
    showAppointments = false;
    showNoInformation = false;
    showTimeConstraint = false;
    showSchedulingError = false;
    showStatus = true;

    QLinearGradient b( 0., 0., 0., QApplication::fontMetrics().height() );
    b.setColorAt( 0., Qt::green );
    b.setColorAt( 1., Qt::darkGreen );
    m_brushes.insert( Brush_Normal, QBrush( b ) );

    b.setColorAt( 0., Qt::red );
    b.setColorAt( 1., Qt::darkRed );
    m_brushes.insert( Brush_Late, QBrush( b ) );

    b.setColorAt( 0., Qt::gray );
    b.setColorAt( 1., Qt::darkGray );
    m_brushes.insert( Brush_Finished, QBrush( b ) );

    b.setColorAt( 0., Qt::blue );
    b.setColorAt( 1., Qt::darkBlue );
    m_brushes.insert( Brush_ReadyToStart, QBrush( b ) );

    b.setColorAt( 0., Qt::white );
    b.setColorAt( 1., Qt::gray );
    m_brushes.insert( Brush_NotReadyToStart, QBrush( b ) );

    b.setColorAt( 0., Qt::white );
    b.setColorAt( 1., Qt::white );
    m_brushes.insert( Brush_NotScheduled, QBrush( b ) );
}

void GanttItemDelegate::paintGanttItem( QPainter* painter, const KDGantt::StyleOptionGanttItem& opt, const QModelIndex& idx )
{
    if ( !idx.isValid() ) return;

    const KDGantt::ItemType typ = static_cast<KDGantt::ItemType>( idx.data( KDGantt::ItemTypeRole ).toInt() );

    QString txt = itemText( idx, typ );
    QRectF itemRect = opt.itemRect;

//     painter->save();
//     painter->setPen( Qt::blue );
//     painter->drawRect( opt.boundingRect.adjusted( -1., -1., 1., 1. ) );
//     painter->setPen( Qt::red );
//     painter->drawRect( itemRect );
//     painter->restore();

    QRectF textRect = itemRect;
    if ( ! txt.isEmpty() ) {
        int tw = opt.fontMetrics.width( txt ) + static_cast<int>( itemRect.height()/1.5 );
        switch( opt.displayPosition ) {
            case KDGantt::StyleOptionGanttItem::Left:
                textRect.adjust( -tw, 0.0, 0.0, 0.0 );
                break;
            case KDGantt::StyleOptionGanttItem::Right:
                textRect.adjust( 0.0, 0.0, tw, 0.0 );
                break;
            default:
                break;
        }
    }
    painter->save();

    QPen pen = defaultPen( typ );
    if ( opt.state & QStyle::State_Selected ) pen.setWidth( 2*pen.width() );
    painter->setPen( pen );

    qreal pw = painter->pen().width()/2.;
    switch( typ ) {
    case KDGantt::TypeTask:
        if ( itemRect.isValid() ) {
            pw-=1;
            QRectF r = itemRect;
            r.translate( 0., r.height()/6. );
            r.setHeight( 2.*r.height()/3. );
            painter->save();
            painter->setBrushOrigin( itemRect.topLeft() );
            painter->translate( 0.5, 0.5 );
            bool normal = true;
            if ( showStatus ) {
                int state = data( idx, TaskWorkPackageModel::NodeStatus, Qt::EditRole ).toInt();
                if ( state & Node::State_NotScheduled ) {
                    painter->setBrush( m_brushes[ Brush_NotScheduled ] );
                    normal = false;
                } else if ( state & Node::State_Finished ) {
                    painter->setBrush( m_brushes[ Brush_Finished ] );
                    normal = false;
                } else if ( state & Node::State_Started ) {
                    if ( state & Node::State_Late ) {
                        painter->setBrush( m_brushes[ Brush_Late ] );
                        normal = false;
                    } else if ( state & Node::State_Started && Node::State_Late ) {
                        painter->setBrush(  m_brushes[ Brush_Late ] );
                        normal = false;
                    }
                } else  {
                    // scheduled, not started, not finished
                    if ( state & Node::State_Late ) {
                        painter->setBrush( m_brushes[ Brush_Late ] );
                        normal = false;
                    } else if ( state & Node::State_NotReadyToStart ) {
                        painter->setBrush( m_brushes[ Brush_NotReadyToStart ] );
                        normal = false;
                    } else if ( state & Node::State_ReadyToStart ) {
                        painter->setBrush(  m_brushes[ Brush_Late ] );
                        normal = false;
                    }
                }
            } else if ( showCriticalTasks ) {
                bool critical = data( idx, NodeModel::NodeCritical, Qt::DisplayRole ).toBool();
                if ( ! critical && showCriticalPath ) {
                    critical = data( idx, NodeModel::NodeCriticalPath, Qt::DisplayRole ).toBool();
                }
                if ( critical ) {
                    QVariant br = data( idx, NodeModel::NodeCritical, Role::Foreground );
                    painter->setBrush( br.isValid() ? br.value<QBrush>() : m_criticalBrush );
                    normal = false;
                }
            }
            if ( normal ) {
                painter->setBrush( m_brushes[ Brush_Normal ] );
            }
            painter->drawRect( r );

            if ( showProgress ) {
                bool ok;
                qreal completion = idx.model()->data( idx, KDGantt::TaskCompletionRole ).toDouble( &ok );
                if ( ok ) {
                    qreal h = r.height();
                    QRectF cr( r.x(), r.y()+h/4. + 1,
                            r.width()*completion/100., h/2. - 2 );
                    painter->fillRect( cr, painter->pen().brush() );
                }
            }
            painter->restore();

            Qt::Alignment ta;
            switch( opt.displayPosition ) {
            case KDGantt::StyleOptionGanttItem::Left: ta = Qt::AlignLeft; break;
            case KDGantt::StyleOptionGanttItem::Right: ta = Qt::AlignRight; break;
            case KDGantt::StyleOptionGanttItem::Center: ta = Qt::AlignCenter; break;
            }
            painter->drawText( textRect, ta, txt );
        }
        break;
    default:
        break;
    }
    painter->restore();
}

QString GanttItemDelegate::toolTip( const QModelIndex &idx ) const
{
    if ( !idx.isValid() || ! idx.model() ) {
        return QString();
    }
    const QAbstractItemModel* model = idx.model();
    if ( data( idx, TaskWorkPackageModel::NodeFinished, Qt::EditRole ).toBool() ) {
        // finished
        return i18nc( "@info:tooltip",
                      "Task: %1<nl/>"
                      "Actual finish: %2<nl/>"
                      "Planned finish: %3<nl/>"
                      "Status: %4<nl/>"
                      "Project: %5",
                      model->data( idx, Qt::DisplayRole ).toString(),
                      data( idx, TaskWorkPackageModel::NodeActualFinish, Qt::DisplayRole ).toString(),
                      data( idx, TaskWorkPackageModel::NodeEndTime, Qt::DisplayRole ).toString(),
                      data( idx, TaskWorkPackageModel::NodeStatus, Qt::DisplayRole ).toString(),
                      data( idx, TaskWorkPackageModel::ProjectName, Qt::DisplayRole ).toString()
                      );
    }
    if ( data( idx, TaskWorkPackageModel::NodeStarted, Qt::EditRole ).toBool() ) {
        // started
        return i18nc( "@info:tooltip",
                      "Task: %1<nl/>"
                      "Completion: %2 %<nl/>"
                      "Actual start: %3<nl/>"
                      "Planned: %4 - %5<nl/>"
                      "Status: %6<nl/>"
                      "Project: %7",
                      model->data( idx, Qt::DisplayRole ).toString(),
                      data( idx, TaskWorkPackageModel::NodeCompleted, Qt::DisplayRole ).toString(),
                      data( idx, TaskWorkPackageModel::NodeActualStart, Qt::DisplayRole ).toString(),
                      data( idx, TaskWorkPackageModel::NodeStartTime, Qt::DisplayRole ).toString(),
                      data( idx, TaskWorkPackageModel::NodeEndTime, Qt::DisplayRole ).toString(),
                      data( idx, TaskWorkPackageModel::NodeStatus, Qt::DisplayRole ).toString(),
                      data( idx, TaskWorkPackageModel::ProjectName, Qt::DisplayRole ).toString()
                      );
    }
    // Planned
    KDGantt::StyleOptionGanttItem opt;
    int typ = data( idx, NodeModel::NodeType, Qt::EditRole ).toInt();
    switch ( typ ) {
        case Node::Type_Task:
            return i18nc( "@info:tooltip",
                          "Task: %1<nl/>"
                          "Planned: %2 - %3<nl/>"
                          "Status: %4<nl/>"
                          "Project: %5",
                          model->data( idx, Qt::DisplayRole ).toString(),
                          data( idx, TaskWorkPackageModel::NodeStartTime, Qt::DisplayRole ).toString(),
                          data( idx, TaskWorkPackageModel::NodeEndTime, Qt::DisplayRole ).toString(),
                          data( idx, TaskWorkPackageModel::NodeStatus, Qt::DisplayRole ).toString(),
                          data( idx, TaskWorkPackageModel::ProjectName, Qt::DisplayRole ).toString()
                          );
    }
    return QString();
}

GanttView::GanttView( Part *part, QWidget *parent )
    : KPlato::GanttViewBase( parent ),
      m_part( part ),
      m_project( 0 ),
      m_ganttdelegate( new GanttItemDelegate( this ) ),
      m_itemmodel( new TaskWorkPackageModel( part, this ) )
{
    kDebug(planworkDbg())<<"------------------- create GanttView -----------------------";
    m_itemmodel->setObjectName( "Gantt model" );
    graphicsView()->setItemDelegate( m_ganttdelegate );
    GanttTreeView *tv = new GanttTreeView( this );
    tv->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
    tv->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    tv->setVerticalScrollMode( QAbstractItemView::ScrollPerPixel ); // needed since qt 4.2
    setLeftView( tv );
    m_rowController = new KDGantt::TreeViewRowController( tv, ganttProxyModel() );
    setRowController( m_rowController );
    tv->header()->setStretchLastSection( true );

    KDGantt::View::setModel( m_itemmodel );

    QList<int> show;
    show << TaskWorkPackageModel::NodeName << TaskWorkPackageModel::NodeDescription;
    tv->setDefaultColumns( show );
    for ( int i = 0; i < m_itemmodel->columnCount(); ++i ) {
        if ( ! show.contains( i ) ) {
            tv->hideColumn( i );
        }
    }
    kDebug(planworkDbg())<<"mapping roles";
    KDGantt::ProxyModel *m = static_cast<KDGantt::ProxyModel*>( ganttProxyModel() );

    m->setRole( KDGantt::ItemTypeRole, KDGantt::ItemTypeRole ); // To provide correct format
    m->setRole( KDGantt::StartTimeRole, Qt::EditRole ); // To provide correct format
    m->setRole( KDGantt::EndTimeRole, Qt::EditRole ); // To provide correct format

    m->setColumn( KDGantt::ItemTypeRole, TaskWorkPackageModel::NodeType );
    m->setColumn( KDGantt::StartTimeRole, TaskWorkPackageModel::NodeStartTime );
    m->setColumn( KDGantt::EndTimeRole, TaskWorkPackageModel::NodeEndTime );
    m->setColumn( KDGantt::TaskCompletionRole, TaskWorkPackageModel::NodeCompleted );
    kDebug(planworkDbg())<<"roles mapped";

    KDGantt::DateTimeGrid *g = static_cast<KDGantt::DateTimeGrid*>( grid() );
    g->setDayWidth( 30 );
    // FIXME: improve/cover all options
    QMap<QString, QString> format;
    format.insert( "%H", "HH" );
    format.insert( "%k", "H" );
    format.insert( "%I", "HH A" );
    format.insert( "%l", "h a" );
    g->setHourFormat( format.value( KGlobal::locale()->timeFormat().left( 2 ) ) );

    for ( int i = 0; i < part->workPackageCount(); ++i ) {
        updateDateTimeGrid( part->workPackage( i ) );
    }
    connect( m_itemmodel, SIGNAL(rowsInserted(QModelIndex,int,int)), SLOT(slotRowsInserted(QModelIndex,int,int)));
    connect( m_itemmodel, SIGNAL(rowsRemoved(QModelIndex,int,int)), SLOT(slotRowsRemoved(QModelIndex,int,int)));

    connect(tv, SIGNAL(contextMenuRequested(QModelIndex,QPoint)), this, SIGNAL(contextMenuRequested(QModelIndex,QPoint)));
    connect(tv, SIGNAL(headerContextMenuRequested(QPoint)), this, SIGNAL(headerContextMenuRequested(QPoint)));

    connect(tv->selectionModel(), SIGNAL(selectionChanged(QItemSelection,QItemSelection)), this, SLOT(slotSelectionChanged(QItemSelection,QItemSelection)));

    connect(tv->header(), SIGNAL(sectionMoved(int,int,int)), SIGNAL(sectionsMoved()));
}

GanttView::~GanttView()
{
    delete m_rowController;
}

void GanttView::slotSelectionChanged( const QItemSelection &selected, const QItemSelection& )
{
    emit selectionChanged( selected.indexes() );
}

void GanttView::slotRowsInserted( const QModelIndex &parent, int start, int end )
{
    kDebug(planworkDbg())<<parent<<start<<end;
    if ( ! parent.isValid() ) {
        for ( int i = start; i <= end; ++i ) {
            updateDateTimeGrid( m_itemmodel->workPackage( i ) );
        }
    }
}

void GanttView::slotRowsRemoved( const QModelIndex &/*parent*/, int /*start*/, int /*end*/ )
{
    KDGantt::DateTimeGrid *g = static_cast<KDGantt::DateTimeGrid*>( grid() );
    g->setStartDateTime( QDateTime() );
    for ( int i = 0; i < m_part->workPackageCount(); ++i ) {
        updateDateTimeGrid( m_part->workPackage( i ) );
    }
}

void GanttView::updateDateTimeGrid( WorkPackage *wp )
{
    kDebug(planworkDbg())<<wp;
    if ( ! wp || ! wp->project() || ! wp->project()->childNode( 0 ) ) {
        return;
    }
    Task *task = static_cast<Task*>( wp->project()->childNode( 0 ) );
    DateTime st = task->startTime();
    if ( ! st.isValid() && task->completion().startTime().isValid() ) {
        st = qMin( st, task->completion().startTime() );
    }
    if ( ! st.isValid() ) {
        return;
    }
    KDGantt::DateTimeGrid *g = static_cast<KDGantt::DateTimeGrid*>( grid() );
    QDateTime gst = g->startDateTime();
    if ( ! gst.isValid() || gst > st ) {
        st.setTime(QTime(0, 0, 0, 0));
        g->setStartDateTime( st );
    }
}

TaskWorkPackageModel *GanttView::itemModel() const
{
    return m_itemmodel;
}

void GanttView::setProject( Project *project )
{
    itemModel()->setProject( project );
    m_project = project;
}

QList<Node*> GanttView::selectedNodes() const
{
    QList<Node*> nodes;
    foreach( const QModelIndex &idx, treeView()->selectionModel()->selectedRows() ) {
        nodes << itemModel()->nodeForIndex( idx );
    }
    return nodes;
}

Node *GanttView::currentNode() const
{
    return itemModel()->nodeForIndex( treeView()->selectionModel()->currentIndex() );
}

bool GanttView::loadContext( const KoXmlElement &context )
{
    KoXmlElement e = context.namedItem( "itemview" ).toElement();
    if ( ! e.isNull() ) {
        treeView()->loadContext( itemModel()->columnMap(), e );
    }
    e = context.namedItem( "ganttview" ).toElement();
    if ( ! e.isNull() ) {
        KPlato::GanttViewBase::loadContext( e );
    }
    return true;
}

void GanttView::saveContext(  QDomElement &context ) const
{
    QDomElement e = context.ownerDocument().createElement( "itemview" );
    context.appendChild( e );
    treeView()->saveContext( itemModel()->columnMap(), e );
    e = context.ownerDocument().createElement( "ganttview" );
    context.appendChild( e );
    KPlato::GanttViewBase::saveContext( e );
}

//-----------------------------------
TaskWPGanttView::TaskWPGanttView( Part *part, QWidget *parent )
    : AbstractView( part, parent )
{
    kDebug(planworkDbg())<<"-------------------- creating TaskWPGanttView -------------------";
    QVBoxLayout * l = new QVBoxLayout( this );
    l->setMargin( 0 );
    m_view = new GanttView( part, this );
    l->addWidget( m_view );

    setupGui();

    connect(itemModel(), SIGNAL(executeCommand(KUndo2Command*)), part, SLOT(addCommand(KUndo2Command*)));

    connect( m_view, SIGNAL(contextMenuRequested(QModelIndex,QPoint)), SLOT(slotContextMenuRequested(QModelIndex,QPoint)));
    connect( m_view, SIGNAL(headerContextMenuRequested(QPoint)), SLOT(slotHeaderContextMenuRequested(QPoint)));

    connect( m_view, SIGNAL(selectionChanged(QModelIndexList)), SLOT(slotSelectionChanged(QModelIndexList)));

    connect(m_view, SIGNAL(sectionsMoved()), SLOT(sectionsMoved()));
}

void TaskWPGanttView::slotSelectionChanged( const QModelIndexList& /*lst*/ )
{
    emit selectionChanged();
}

QList<Node*> TaskWPGanttView::selectedNodes() const
{
    return m_view->selectedNodes();
}

Node *TaskWPGanttView::currentNode() const
{
    return m_view->currentNode();
}

void TaskWPGanttView::slotContextMenuRequested( const QModelIndex &idx, const QPoint& pos )
{
    kDebug(planworkDbg())<<idx<<pos;
    if ( ! idx.isValid() ) {
        slotHeaderContextMenuRequested( pos );
        return;
    }
    Node *node = itemModel()->nodeForIndex( idx );
    if ( node ) {
        return slotContextMenuRequested( node, pos );
    }
    Document *doc = itemModel()->documentForIndex( idx );
    if ( doc ) {
        return slotContextMenuRequested( doc, pos );
    }
    return slotHeaderContextMenuRequested( pos );
}

void TaskWPGanttView::setupGui()
{
    actionOptions = new KAction(koIcon("configure"), i18n("Configure View..."), this);
    connect(actionOptions, SIGNAL(triggered(bool)), SLOT(slotOptions()));
    addContextAction( actionOptions );
}

void TaskWPGanttView::slotOptions()
{
    kDebug(planworkDbg());
    QPointer<ItemViewSettupDialog> dlg = new ItemViewSettupDialog( 0, m_view->treeView(), true, this );
    dlg->exec();
    delete dlg;
    saveContext();
}

bool TaskWPGanttView::loadContext()
{
    KoXmlDocument doc;
    doc.setContent( PlanWorkSettings::self()->taskWPGanttView() );
    KoXmlElement context = doc.namedItem( "TaskWPGanttViewSettings" ).toElement();
    if ( context.isNull() ) {
        kDebug(planworkDbg())<<"No settings";
        return false;
    }
    return m_view->loadContext( context );
}

void TaskWPGanttView::saveContext()
{
    QDomDocument doc ( "TaskWPGanttView" );
    QDomElement context = doc.createElement( "TaskWPGanttViewSettings" );
    doc.appendChild( context );
    m_view->saveContext( context );
    PlanWorkSettings::self()->setTaskWPGanttView( doc.toString() );
    PlanWorkSettings::self()->writeConfig();
    kDebug(planworkDbg())<<endl<<doc.toString();
}

} // namespace KPlatoWork

#include "taskworkpackageview.moc"
