/* -*- 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 2000-2022 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.
*/

#define RG_MODULE_STRING "[SegmentEraser]"

#include "SegmentEraser.h"

#include "misc/Debug.h"
#include "commands/segment/SegmentEraseCommand.h"
#include "CompositionView.h"
#include "ChangingSegment.h"
#include "document/RosegardenDocument.h"
#include "gui/general/BaseTool.h"
#include "gui/general/RosegardenScrollView.h"
#include "SegmentTool.h"
#include "document/Command.h"
#include "document/CommandHistory.h"
#include <QPoint>
#include <QString>
#include <QMouseEvent>


namespace Rosegarden
{


QString SegmentEraser::ToolName() { return "segmenteraser"; }

SegmentEraser::SegmentEraser(CompositionView *c, RosegardenDocument *d)
        : SegmentTool(c, d)
{
    RG_DEBUG << "SegmentEraser()\n";
}

void SegmentEraser::ready()
{
    m_canvas->viewport()->setCursor(Qt::PointingHandCursor);
    setContextHelp(tr("Click on a segment to delete it"));
}

void SegmentEraser::mousePressEvent(QMouseEvent *e)
{
    // Let the baseclass have a go.
    SegmentTool::mousePressEvent(e);

    // We only care about the left mouse button.
    if (e->button() != Qt::LeftButton)
        return;

    // No need to propagate.
    e->accept();

    QPoint pos = m_canvas->viewportToContents(e->pos());

    // Save the Segment for the mouse release event.
    setChangingSegment(m_canvas->getModel()->getSegmentAt(pos));
}

void SegmentEraser::mouseReleaseEvent(QMouseEvent *e)
{
    // We only care about the left mouse button.
    if (e->button() != Qt::LeftButton)
        return;

    // No need to propagate.
    e->accept();

    // If a Segment was selected by the press event
    if (getChangingSegment()) {
        // Erase it
        CommandHistory::getInstance()->addCommand(
                new SegmentEraseCommand(getChangingSegment()->getSegment()));
    }

    // Clear the current Segment.
    setChangingSegment(ChangingSegmentPtr());
}

int SegmentEraser::mouseMoveEvent(QMouseEvent *e)
{
    // No need to propagate.
    e->accept();

    return NO_FOLLOW;
}


}
