/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */

/*
    Rosegarden
    A MIDI and audio sequencer and musical notation editor.
    Copyright 2000-2011 the Rosegarden development team.
 
    Other copyrights also apply to some parts of this work.  Please
    see the AUTHORS file and individual file headers for details.
 
    This program 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 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#include "NotationSelector.h"
#include "NotationElement.h"
#include "NotationProperties.h"
#include "NotationStaff.h"
#include "NotationTool.h"
#include "NotationWidget.h"
#include "NotePixmapFactory.h"
#include "NotationMouseEvent.h"
#include "NotationScene.h"

#include "misc/Debug.h"

#include "base/Event.h"
#include "base/NotationTypes.h"
#include "base/PropertyName.h"
#include "base/Selection.h"
#include "base/ViewElement.h"
#include "base/BaseProperties.h"
#include "base/Profiler.h"

#include "commands/edit/MoveAcrossSegmentsCommand.h"
#include "commands/edit/MoveCommand.h"
#include "commands/edit/TransposeCommand.h"
#include "commands/notation/IncrementDisplacementsCommand.h"

#include "gui/general/GUIPalette.h"

#include "document/CommandHistory.h"

#include <QAction>
#include <QApplication>
#include <QIcon>
#include <QRect>
#include <QString>
#include <QTimer>


namespace Rosegarden
{
 
using namespace BaseProperties;

NotationSelector::NotationSelector(NotationWidget *widget) :
    NotationTool("notationselector.rc", "NotationSelector", widget),
    m_selectionRect(0),
    m_updateRect(false),
    m_selectedStaff(0),
    m_clickedElement(0),
    m_selectionToMerge(0),
    m_justSelectedBar(false),
    m_wholeStaffSelectionComplete(false)
{
    connect(m_widget, SIGNAL(usedSelection()),
            this, SLOT(slotHideSelection()));

    connect(this, SIGNAL(editElement(NotationStaff *, NotationElement *, bool)),
            m_widget, SIGNAL(editElement(NotationStaff *, NotationElement *, bool)));

    createAction("insert", SLOT(slotInsertSelected()));
    createAction("erase", SLOT(slotEraseSelected()));
    createAction("collapse_rests_aggressively", SLOT(slotCollapseRestsHard()));
    createAction("respell_flat", SLOT(slotRespellFlat()));
    createAction("respell_sharp", SLOT(slotRespellSharp()));
    createAction("respell_natural", SLOT(slotRespellNatural()));
    createAction("collapse_notes", SLOT(slotCollapseNotes()));
    createAction("interpret", SLOT(slotInterpret()));
    createAction("move_events_up_staff", SLOT(slotStaffAbove()));
    createAction("move_events_down_staff", SLOT(slotStaffBelow()));
    createAction("make_invisible", SLOT(slotMakeInvisible()));
    createAction("make_visible", SLOT(slotMakeVisible()));


    createMenu();
}

NotationSelector::~NotationSelector()
{
    delete m_selectionToMerge;
}

void
NotationSelector::handleLeftButtonPress(const NotationMouseEvent *e)
{
    if (m_justSelectedBar) {
        handleMouseTripleClick(e);
        m_justSelectedBar = false;
        return ;
    }

    m_wholeStaffSelectionComplete = false;

    delete m_selectionToMerge;
    const EventSelection *selectionToMerge = 0;
    if (e->modifiers & Qt::ShiftModifier) {
        m_clickedShift = true;
        selectionToMerge = m_scene->getSelection();
    } else {
        m_clickedShift = false;
    }
//    std::cout << "NotationSelector::handleLeftButtonPress(): m_clickedShift == " << (m_clickedShift ? "true" : "false") << std::endl;
    m_selectionToMerge =
        (selectionToMerge ? new EventSelection(*selectionToMerge) : 0);

    m_selectedStaff = e->staff;
    m_clickedElement = 0;

    if (e->exact) {
        m_clickedElement = e->element;
        if (m_clickedElement) {
            m_lastDragPitch = -400;
            m_lastDragTime = m_clickedElement->event()->getNotationAbsoluteTime();
        }
    }

    if (!m_selectionRect) {
        m_selectionRect = new QGraphicsRectItem;
        m_scene->addItem(m_selectionRect);
        QColor c = GUIPalette::getColour(GUIPalette::SelectionRectangle);
        m_selectionRect->setPen(QPen(c, 2));
        c.setAlpha(50);
        m_selectionRect->setBrush(c);
    }

    m_selectionOrigin = QPointF(e->sceneX, e->sceneY);
    m_selectionRect->setRect(QRectF(m_selectionOrigin, QSize()));
    m_selectionRect->hide();
    m_updateRect = true;
    m_startedFineDrag = false;
}

void
NotationSelector::handleRightButtonPress(const NotationMouseEvent *e)
{
    // if nothing selected, permit the possibility of selecting
    // something before showing the menu
    std::cerr << "NotationSelector::handleRightButtonPress" << std::endl;

    const EventSelection *sel = m_scene->getSelection();

    if (!sel || sel->getSegmentEvents().empty()) {

        if (e->element) {
            m_clickedElement = e->element;
            m_selectedStaff = e->staff;
            m_scene->setSingleSelectedEvent
                (m_selectedStaff, m_clickedElement, true);
        }
    }

    NotationTool::handleRightButtonPress(e);
}

void NotationSelector::slotClickTimeout()
{
    m_justSelectedBar = false;
}

void NotationSelector::handleMouseDoubleClick(const NotationMouseEvent *e)
{
    NOTATION_DEBUG << "NotationSelector::handleMouseDoubleClick" << endl;

    NotationStaff *staff = e->staff;
    if (!staff) return;
    m_selectedStaff = staff;

    bool advanced = (e->modifiers & Qt::ShiftModifier);

    if (e->element && e->exact) {

        emit editElement(staff, e->element, advanced);

    } else {

        //!!! This code is completely broken.  getBarExtents() appears to be
        // rubbish, and everything falls apart from there

        QRect rect = staff->getBarExtents(e->sceneX, e->sceneY);
        
        m_selectionRect->setRect(rect.x() + 0.5, rect.y() + 0.5,
                                 rect.width(), rect.height());
//        m_selectionRect->setY(rect.y());
//        m_selectionRect->setSize(rect.width() - 1, rect.height());

        m_selectionRect->show();
        m_updateRect = false;

        m_justSelectedBar = true;
        QTimer::singleShot(QApplication::doubleClickInterval(), this,
                           SLOT(slotClickTimeout()));
    }

    return;
}

void NotationSelector::handleMouseTripleClick(const NotationMouseEvent *e)
{
    NOTATION_DEBUG << "NotationSelector::handleMouseTripleClick" << endl;

    if (!m_justSelectedBar) return;
    m_justSelectedBar = false;

    NotationStaff *staff = e->staff;
    if (!staff) return;
    m_selectedStaff = staff;

    if (e->element && e->exact) {

        // should be safe, as we've already set m_justSelectedBar false
        handleLeftButtonPress(e);
        return;

    } else {

        m_selectionRect->setRect(staff->getX(), staff->getY(),
                                 staff->getTotalWidth() - 1,
                                 staff->getTotalHeight() - 1);

        m_selectionRect->show();
        m_updateRect = false;
    }

    m_wholeStaffSelectionComplete = true;

    return;
}

NotationSelector::FollowMode
NotationSelector::handleMouseMove(const NotationMouseEvent *e)
{
    if (!m_updateRect) return NoFollow;

//    std::cout << "NotationSelector::handleMouseMove: staff is " 
//              << m_selectedStaff << ", m_updateRect is " << m_updateRect
//              << std::endl;

    if (!m_selectedStaff) m_selectedStaff = e->staff;

    int w = int(e->sceneX - m_selectionRect->x());
    int h = int(e->sceneY - m_selectionRect->y());

    NOTATION_DEBUG << "NotationSelector::handleMouseMove:  w: " << w << " h: " << h << endl;

    if (m_clickedElement /* && !m_clickedElement->isRest() */) {

// Fine (micro-position) drag is BROKEN, and I'm bypassing its mangled corpse.        
//        if (m_startedFineDrag) {
//            dragFine(e->sceneX, e->sceneY, false);
//        } else if (m_clickedShift) {
//            if (w > 2 || w < -2 || h > 2 || h < -2) {
//                dragFine(e->sceneX, e->sceneY, false);
//           }
//        } else 
           
        if ((w > 3 || w < -3 || h > 3 || h < -3) &&
            !m_clickedShift) {
//            std::cout << "Dragging from Code Point Bravo: w: " << w << " h: " << h << std::endl;
            drag(e->sceneX, e->sceneY, false);
        }

    } else {

        // Qt rectangle dimensions appear to be 1-based
        if (w > 0) ++w;
        else --w;
        if (h > 0) ++h;
        else --h;

        QPointF p0(m_selectionOrigin);
        QPointF p1(e->sceneX, e->sceneY);
        QRectF r = QRectF(p0, p1).normalized();

        m_selectionRect->setRect(r.x() + 0.5, r.y() + 0.5, r.width(), r.height());
        m_selectionRect->show();

        setViewCurrentSelection(true);
    }

    return FollowMode(FollowHorizontal | FollowVertical);
}

void NotationSelector::handleMouseRelease(const NotationMouseEvent *e)
{
    NOTATION_DEBUG << "NotationSelector::handleMouseRelease" << endl;
    m_updateRect = false;

    // Test how far we've moved from the original click position -- not
    // how big the rectangle is (if we were dragging an event, the
    // rectangle size will still be zero).

    int w = int(e->sceneX - m_selectionRect->x());
    int h = int(e->sceneY - m_selectionRect->y());

//    std::cout << "e->sceneX: " << e->sceneX << " Y: " << e->sceneY 
//              << " m_selectionRect->x(): " << m_selectionRect->x()
//              << " y(): " << m_selectionRect->y() << std::endl
//              << "w: " << w << " h: " << h << " m_startedFineDrag == " << m_startedFineDrag << std::endl;

    //!!! Deeper bug here, surely.  The code commented out above revealed
    // m_selectionRect was always (0,0) in every situation where I could get this
    // code to fire.  This makes the above values for w and h above completely
    // meaningless nonsense as far as I can see.
     
    if ((w > -3 && w < 3 && h > -3 && h < 3 && !m_startedFineDrag) ||
        (m_clickedShift)) {
      
        //!!! Removing this test is necessary in order to make it possible for
        // the user to drag a note and drop it somewhere.  I think it's all tied
        // up in the broken "fine drag" mechanism.  I'm honestly not sure about
        // much after a day of whacking moles, but it's safe to say this next
        // test is very detrimental, so it has been removed once again.
        // || (m_selectionRect->x() == 0 && m_selectionRect->y() == 0 && !m_startedFineDrag)*/) {

        if (m_clickedElement != 0 && m_selectedStaff) {
            
            // If we didn't drag out a meaningful area, but _did_
            // click on an individual event, then select just that
            // event

            if (m_selectionToMerge &&
                m_selectionToMerge->getSegment() ==
                m_selectedStaff->getSegment()) {

                // if the event was already part of the selection, we want to
                // remove it
                if (m_selectionToMerge->contains(m_clickedElement->event())) {
                    m_selectionToMerge->removeEvent(m_clickedElement->event());
                } else {
                    m_selectionToMerge->addEvent(m_clickedElement->event());
                }
                
                m_scene->setSelection(m_selectionToMerge, true);
                m_selectionToMerge = 0;

            } else {

                m_scene->setSingleSelectedEvent(m_selectedStaff, m_clickedElement, true);
            }
            /*
                    } else if (m_selectedStaff) {
             
                        // If we clicked on no event but on a staff, move the
                        // insertion cursor to the point where we clicked. 
                        // Actually we only really want this to happen if
                        // we aren't double-clicking -- consider using a timer
                        // to establish whether a double-click is going to happen
             
                        m_nParentView->slotSetInsertCursorPosition(e->x(), (int)e->y());
            */
        } else {
            setViewCurrentSelection(false);
        }

    } else {

// Fine (micro-position) drag is BROKEN, and I'm bypassing its mangled corpse.        
//        if (m_startedFineDrag) {
//            dragFine(e->sceneX, e->sceneY, true);
//        } else

        // in a world without fine drag, we do _not_ want to begin any kind of
        // drag operation if Shift was pressed, because this modifier can only
        // be used to make additive selections
        if (m_clickedElement &&
            !m_clickedShift /* &&
            !m_clickedElement->isRest() */) {
//            std::cout << "Dragging from Code Point Foxtrot: w: " << w << " h: " << h << std::endl;
            // drag() must be called here from Foxtrot, whether attempting to
            // click to select a note head or to click and drag a note.  It's
            // required in both cases, and neither case works without this call
            // here:
            drag(e->sceneX, e->sceneY, true);
        } else {
            setViewCurrentSelection(false);
        }
    }

    m_clickedElement = 0;
    m_selectionRect->hide();
    m_wholeStaffSelectionComplete = false;
}

void NotationSelector::drag(int x, int y, bool final)
{
    NOTATION_DEBUG << "NotationSelector::drag " << x << ", " << y << endl;

    if (!m_clickedElement || !m_selectedStaff) return ;

    EventSelection *selection = m_scene->getSelection();

    NOTATION_DEBUG << "NotationSelector::drag: scene currently has selection with " << (selection ? selection->getSegmentEvents().size() : 0) << " event(s)" << endl;

    if (!selection || !selection->contains(m_clickedElement->event())) {
        selection = new EventSelection(m_selectedStaff->getSegment());
        NOTATION_DEBUG << "(selection does not contain our event " << m_clickedElement->event() << " of type " << m_clickedElement->event()->getType() << ", adding it)" << endl;
        selection->addEvent(m_clickedElement->event());
    }
    m_scene->setSelection(selection, false);

    NOTATION_DEBUG << "Sorted out selection" << endl;

    NotationStaff *targetStaff = m_scene->getStaffForSceneCoords(x, y);
    if (!targetStaff) targetStaff = m_selectedStaff;

    // Calculate time and height

    timeT clickedTime = m_clickedElement->event()->getNotationAbsoluteTime();

    Accidental clickedAccidental = Accidentals::NoAccidental;
    (void)m_clickedElement->event()->get<String>(ACCIDENTAL, clickedAccidental);

    // get the pitch from the element that was clicked on
    long clickedPitch = 0;
    (void)m_clickedElement->event()->get<Int>(PITCH, clickedPitch);

    // get the height from the element that was clicked on
    long clickedHeight = 0;
    (void)m_clickedElement->event()->get<Int>
            (NotationProperties::HEIGHT_ON_STAFF, clickedHeight);

    Event *clefEvt = 0, *keyEvt = 0;
    Clef clef;
    ::Rosegarden::Key key;

    timeT dragTime = clickedTime;
    double layoutX = m_clickedElement->getLayoutX();
    timeT duration = m_clickedElement->getViewDuration();

    NotationElementList::iterator itr =
        targetStaff->getElementUnderSceneCoords(x, y, clefEvt, keyEvt);

    if (itr != targetStaff->getViewElementList()->end()) {

        NotationElement *elt = dynamic_cast<NotationElement *>(*itr);
        dragTime = elt->getViewAbsoluteTime();
        layoutX = elt->getLayoutX();

        if (elt->isRest() && duration > 0 && elt->getItem()) {

            double restX = 0, restWidth = 0;
            elt->getSceneAirspace(restX, restWidth);

            timeT restDuration = elt->getViewDuration();

            if (restWidth > 0 && restDuration >= duration * 2) {

                int parts = restDuration / duration;
                double encroachment = x - restX;
                NOTATION_DEBUG << "encroachment is " << encroachment << ", restWidth is " << restWidth << endl;
                int part = (int)((encroachment / restWidth) * parts);
                if (part >= parts) part = parts - 1;

                dragTime += part * restDuration / parts;
                layoutX += part * restWidth / parts + (restX - elt->getSceneX());
            }
        }
    }

    if (clefEvt)
        clef = Clef(*clefEvt);
    if (keyEvt)
        key = ::Rosegarden::Key(*keyEvt);

    // set height to the height of y at the mouse click that got us here,
    // weighted toward clickedHeight (the height-on-staff property of the
    // element that was clicked) to make it more difficult to move notes by
    // mistake
    int height = targetStaff->getWeightedHeightAtSceneCoords(clickedHeight, x, y);

    // set pitch to the pitch of the notation element that got us here
    int pitch = clickedPitch;

    // if the height of y isn't the same as the height of the element that got
    // us here, we're doing a move
    if (height != clickedHeight) {
        pitch = Pitch(height, clef, key,
                      clickedAccidental).getPerformancePitch();
    }

    if (pitch < clickedPitch) {
        if (height < -10) {
            height = -10;
            pitch = Pitch(height, clef, key,
                          clickedAccidental).getPerformancePitch();
        }
    } else if (pitch > clickedPitch) {
        if (height > 18) {
            height = 18;
            pitch = Pitch(height, clef, key,
                          clickedAccidental).getPerformancePitch();
        }
    }

    bool singleNonNotePreview = !m_clickedElement->isNote() &&
                                selection->getSegmentEvents().size() == 1;

    if (!final && !singleNonNotePreview) {

        if ((pitch != m_lastDragPitch || dragTime != m_lastDragTime) &&
            m_clickedElement->isNote()) {

            m_scene->showPreviewNote(targetStaff, layoutX, pitch, height,
                                     Note::getNearestNote(duration),
                                     m_clickedElement->isGrace());
            m_lastDragPitch = pitch;
            m_lastDragTime = dragTime;
        }

    } else {

        m_scene->clearPreviewNote(targetStaff);

        MacroCommand *command = new MacroCommand(MoveCommand::getGlobalName());
        bool haveSomething = false;

        MoveCommand *mc = 0;
        Event *lastInsertedEvent = 0;

        if (pitch != clickedPitch && m_clickedElement->isNote()) {
            command->addCommand(new TransposeCommand(pitch - clickedPitch,
                                *selection));
            haveSomething = true;
        }

        if (targetStaff != m_selectedStaff) {
            command->addCommand(new MoveAcrossSegmentsCommand
                                (m_selectedStaff->getSegment(),
                                 targetStaff->getSegment(),
                                 dragTime - clickedTime + selection->getStartTime(),
                                 true,
                                 *selection));
            haveSomething = true;
        } else {
            if (dragTime != clickedTime) {
                mc = new MoveCommand
                     (m_selectedStaff->getSegment(),  //!!!sort
                      dragTime - clickedTime, true, *selection);
                command->addCommand(mc);
                haveSomething = true;
            }
        }

        if (haveSomething) {

	    CommandHistory::getInstance()->addCommand(command);

            // Moving the event will cause a new event to be created,
            // so our clicked element will no longer be valid.  But we
            // can't always recreate it, so as a precaution clear it
            // here so at least it isn't set to something bogus
            m_clickedElement = 0;

            if (mc && singleNonNotePreview) {

                lastInsertedEvent = mc->getLastInsertedEvent();

                if (lastInsertedEvent) {
                    m_scene->setSingleSelectedEvent(&targetStaff->getSegment(),
                                                    lastInsertedEvent,
						    true);

                    ViewElementList::iterator vli =
                        targetStaff->findEvent(lastInsertedEvent);

                    if (vli != targetStaff->getViewElementList()->end()) {
                        m_clickedElement = dynamic_cast<NotationElement *>(*vli);
                    } else {
                        m_clickedElement = 0;
                    }

                    m_selectionRect->setPos(x, y);
                }
            }
        } else {
            delete command;
	}
    }
}

void NotationSelector::dragFine(int x, int y, bool final)
{
    //!!! Fine drag is very seriously broken, and its presence is complicating
    // the matter of sorting out far more serious problems.  I haven't been able
    // to so much as scratch the surface of sorting it out, so I've bypassed it.
    // Nobody has complained about how broken this has been since the port, so I
    // intend to leave it broken, and try to compensate by improving the layout
    // code instead.
    NOTATION_DEBUG << "NotationSelector::dragFine: Fine drag is broken and has been bypassed.  Seeing this message is a BUG!" << endl;
    return;

    NOTATION_DEBUG << "NotationSelector::dragFine (micro-position) x:" << x << " y: " << y << endl;

    if (!m_clickedElement || !m_selectedStaff)
        return ;

    EventSelection *selection = m_scene->getSelection();
    if (!selection)
        selection = new EventSelection(m_selectedStaff->getSegment());
    if (!selection->contains(m_clickedElement->event()))
        selection->addEvent(m_clickedElement->event());
    m_scene->setSelection(selection, false);

    // Fine drag modifies the DISPLACED_X and DISPLACED_Y properties on
    // each event.  The modifications have to be relative to the previous
    // values of these properties, not to zero, so for each event we need
    // to store the previous value at the time the drag starts.

    static PropertyName xProperty("temporary-displaced-x");
    static PropertyName yProperty("temporary-displaced-y");

    if (!m_startedFineDrag) {
        // back up original properties

        for (EventSelection::eventcontainer::iterator i =
                    selection->getSegmentEvents().begin();
                i != selection->getSegmentEvents().end(); ++i) {
            long prevX = 0, prevY = 0;
            (*i)->get<Int>(DISPLACED_X, prevX);
            (*i)->get<Int>(DISPLACED_Y, prevY);
            (*i)->setMaybe<Int>(xProperty, prevX);
            (*i)->setMaybe<Int>(yProperty, prevY);
        }

        m_startedFineDrag = true;
    }

    // We want the displacements in 1/1000ths of a staff space

    double dx = x - m_selectionRect->x();
    double dy = y - m_selectionRect->y();

    double noteBodyWidth = m_scene->getNotePixmapFactory()->getNoteBodyWidth();
    double lineSpacing = m_scene->getNotePixmapFactory()->getLineSpacing();
    dx = (1000.0 * dx) / noteBodyWidth;
    dy = (1000.0 * dy) / lineSpacing;

    if (final) {

        // reset original values (and remove backup values) before
        // applying command

        for (EventSelection::eventcontainer::iterator i =
                    selection->getSegmentEvents().begin();
                i != selection->getSegmentEvents().end(); ++i) {
            long prevX = 0, prevY = 0;
            (*i)->get<Int>(xProperty, prevX);
            (*i)->get<Int>(yProperty, prevY);
            (*i)->setMaybe<Int>(DISPLACED_X, prevX);
            (*i)->setMaybe<Int>(DISPLACED_Y, prevY);
            (*i)->unset(xProperty);
            (*i)->unset(yProperty);
        }

        IncrementDisplacementsCommand *command = new IncrementDisplacementsCommand
                (*selection, long(dx), long(dy));
        CommandHistory::getInstance()->addCommand(command);

    } else {

        timeT startTime = 0, endTime = 0;

        for (EventSelection::eventcontainer::iterator i =
                    selection->getSegmentEvents().begin();
                i != selection->getSegmentEvents().end(); ++i) {
            long prevX = 0, prevY = 0;
            (*i)->get<Int>(xProperty, prevX);
            (*i)->get<Int>(yProperty, prevY);
            (*i)->setMaybe<Int>(DISPLACED_X, prevX + long(dx));
            (*i)->setMaybe<Int>(DISPLACED_Y, prevY + long(dy));
            if (i == selection->getSegmentEvents().begin()) {
                startTime = (*i)->getAbsoluteTime();
            }
            endTime = (*i)->getAbsoluteTime() + (*i)->getDuration();
        }

        if (startTime == endTime)
            ++endTime;
        selection->getSegment().updateRefreshStatuses(startTime, endTime);
        m_scene->update();
    }
}

void NotationSelector::ready()
{
    m_widget->setCanvasCursor(Qt::arrowCursor);
}

void NotationSelector::stow()
{
    delete m_selectionRect;
    m_selectionRect = 0;
}

void NotationSelector::handleEventRemoved(Event *e)
{
    if (m_clickedElement && m_clickedElement->event() == e) {
        m_clickedElement = 0;
    }
}

void NotationSelector::slotHideSelection()
{
    if (!m_selectionRect) return;
    m_selectionRect->hide();
}

void NotationSelector::slotInsertSelected()
{
    invokeInParentView("draw");
}

void NotationSelector::slotEraseSelected()
{
    invokeInParentView("erase");
}

void NotationSelector::slotCollapseRestsHard()
{
    invokeInParentView("collapse_rests_aggressively");
}

void NotationSelector::slotRespellFlat()
{
    invokeInParentView("respell_flat");
}

void NotationSelector::slotRespellSharp()
{
    invokeInParentView("respell_sharp");
}

void NotationSelector::slotRespellNatural()
{
    invokeInParentView("respell_natural");
}

void NotationSelector::slotCollapseNotes()
{
    invokeInParentView("collapse_notes");
}

void NotationSelector::slotInterpret()
{
    invokeInParentView("interpret");
}

void NotationSelector::slotStaffAbove()
{
    invokeInParentView("move_events_up_staff");
}

void NotationSelector::slotStaffBelow()
{
    invokeInParentView("move_events_down_staff");
}

void NotationSelector::slotMakeInvisible()
{
    invokeInParentView("make_invisible");
}

void NotationSelector::slotMakeVisible()
{
    invokeInParentView("make_visible");
}

void NotationSelector::setViewCurrentSelection(bool preview)
{
    EventSelection *selection = getEventsInSelectionRect();

    if (m_selectionToMerge) {
        if (selection &&
            m_selectionToMerge->getSegment() == selection->getSegment()) {
            selection->addFromSelection(m_selectionToMerge);
        } else {
            return;
        }
    }

    m_scene->setSelection(selection, preview);
}
/*!!!
NotationStaff *
NotationSelector::getStaffForElement(NotationElement *elt)
{
    for (int i = 0; i < m_nParentView->getStaffCount(); ++i) {
        NotationStaff *staff = m_nParentView->getNotationStaff(i);
        if (staff->getSegment().findSingle(elt->event()) !=
                staff->getSegment().end())
            return staff;
    }
    return 0;
}
*/
EventSelection *
NotationSelector::getEventsInSelectionRect()
{
    // If selection rect is not visible or too small,
    // return 0
    //
    if (!m_selectionRect->isVisible()) return 0;

    if (!m_selectedStaff) return 0;

    Profiler profiler("NotationSelector::getEventsInSelectionRect");

    //    NOTATION_DEBUG << "Selection x,y: " << m_selectionRect->x() << ","
    //                         << m_selectionRect->y() << "; w,h: " << m_selectionRect->width() << "," << m_selectionRect->height() << endl;

    QRectF rect = m_selectionRect->rect();

    if (rect.width()  > -3 &&
        rect.width()  <  3 &&
        rect.height() > -3 &&
        rect.height() <  3) return 0;

    QList<QGraphicsItem *> l = m_selectionRect->collidingItems
        (Qt::IntersectsItemShape);

    Segment& segment = m_selectedStaff->getSegment();

    // If we selected the whole staff, force that to happen explicitly
    // rather than relying on collisions with the rectangle -- because
    // events way off the currently visible area might not even have
    // been drawn yet, and so will not appear in the collision list.
    // (We did still need the collision list to determine which staff
    // to use though.)
    
    if (m_wholeStaffSelectionComplete) {
        EventSelection *selection = new EventSelection(segment,
                                                       segment.getStartTime(),
                                                       segment.getEndMarkerTime());
        return selection;
    }
    
    EventSelection *selection = new EventSelection(segment);
    int nbw = m_selectedStaff->getNotePixmapFactory(false).getNoteBodyWidth();

    for (int i = 0; i < l.size(); ++i) {

        QGraphicsItem *item = l[i];
        NotationElement *element = NotationElement::getNotationElement(item);
        if (!element) continue;
            
        double x = element->getSceneX();
        double y = element->getSceneY();

        bool shifted = false;

        // #957364 (Notation: Hard to select upper note in chords
        // of seconds) -- adjust x-coord for shifted note head
        if (element->event()->get<Bool>(m_selectedStaff->getProperties().
                                       NOTE_HEAD_SHIFTED, shifted) && shifted) {
            x += nbw;
        }

        // check if the element's rect
        // is actually included in the selection rect.
        //
        if (!rect.contains(x, y))  {
            // #988217 (Notation: Special column of pixels
            // prevents sweep selection) -- for notes, test again
            // with centred x-coord
            if (!element->isNote() || !rect.contains(x + nbw/2, y)) {
                continue;
            }
        }
                
        // must be in the same segment as we first started on,
        // we can't select events across multiple segments
        if (selection->getSegment().findSingle(element->event()) !=
            selection->getSegment().end()) {
            selection->addEvent(element->event());
        }
    }

    if (selection->getAddedEvents() > 0) {
        return selection;
    } else {
        delete selection;
        return 0;
    }
}

const QString NotationSelector::ToolName = "notationselector";

}
#include "NotationSelector.moc"