root/branches/new_fx_rack_and_sample_fun/gui/src/SongEditor/SongEditor.cpp @ 762

/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 *
 * http://www.hydrogen-music.org
 *
 * 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.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <assert.h>
#include <algorithm>

#include <hydrogen/Song.h>
#include <hydrogen/hydrogen.h>
#include <hydrogen/Preferences.h>
#include <hydrogen/Pattern.h>
#include <hydrogen/audio_engine.h>
#include <hydrogen/event_queue.h>
#include <hydrogen/instrument.h>
using namespace H2Core;


#include "SongEditor.h"
#include "SongEditorPanel.h"
#include "SoundLibrary/SoundLibraryPanel.h"
#include "../PatternEditor/PatternEditorPanel.h"
#include "../HydrogenApp.h"
#include "../InstrumentRack.h"
#include "../widgets/Button.h"
#include "../PatternFillDialog.h"
#include "../PatternPropertiesDialog.h"
#include "../SongPropertiesDialog.h"
#include "../Skin.h"
#include <hydrogen/LocalFileMng.h>


using namespace std;

SongEditor::SongEditor( QWidget *parent )
 : QWidget( parent )
 , Object( "SongEditor" )
 , m_bSequenceChanged( true )
 , m_bIsMoving( false )
 , m_bShowLasso( false )
{
        setAttribute(Qt::WA_NoBackground);
        setFocusPolicy (Qt::StrongFocus);

        m_nGridWidth = 16;
        m_nGridHeight = 18;

        int m_nInitialWidth = 10 + m_nMaxPatternSequence * m_nGridWidth;
        int m_nInitialHeight = 10;

        this->resize( QSize(m_nInitialWidth, m_nInitialHeight) );

        createBackground();     // create m_backgroundPixmap pixmap

        update();
}



SongEditor::~SongEditor()
{
}



int SongEditor::getGridWidth ()
{
        return m_nGridWidth;
}



void SongEditor::setGridWidth( uint width )
{
        if ( ( SONG_EDITOR_MIN_GRID_WIDTH <= width ) && ( SONG_EDITOR_MAX_GRID_WIDTH >= width ) ) {
                m_nGridWidth = width;
                this->resize ( 10 + m_nMaxPatternSequence * m_nGridWidth, height() );
        }
}



void SongEditor::keyPressEvent ( QKeyEvent * ev )
{
        Hydrogen *pEngine = Hydrogen::get_instance();
        PatternList *pPatternList = pEngine->getSong()->get_pattern_list();
        vector<PatternList*>* pColumns = pEngine->getSong()->get_pattern_group_vector();

        if ( ev->key() == Qt::Key_Delete ) {
                if ( m_selectedCells.size() != 0 ) {
                        AudioEngine::get_instance()->lock( "SongEditor::keyPressEvent" );
                        // delete all selected cells
                        for ( uint i = 0; i < m_selectedCells.size(); i++ ) {
                                QPoint cell = m_selectedCells[ i ];
                                PatternList* pColumn = (*pColumns)[ cell.x() ];
                                pColumn->del(pPatternList->get( cell.y() ) );
                        }
                        AudioEngine::get_instance()->unlock();

                        m_selectedCells.clear();
                        m_bSequenceChanged = true;
                        update();
                }
                return;
        }

        ev->ignore();
}



void SongEditor::mousePressEvent( QMouseEvent *ev )
{
        if ( ev->x() < 10 ) {
                return;
        }
        //WARNINGLOG( "editor-pressed" );

        int nRow = ev->y() / m_nGridHeight;
        int nColumn = ( (int)ev->x() - 10 ) / (int)m_nGridWidth;

        if ( ev->modifiers() == Qt::ControlModifier ) {
                INFOLOG( "[mousePressEvent] CTRL pressed!" );
                m_bIsCtrlPressed = true;
        }
        else {
                m_bIsCtrlPressed = false;
        }

        Hydrogen *pEngine = Hydrogen::get_instance();
        Song *pSong = pEngine->getSong();
        PatternList *pPatternList = pSong->get_pattern_list();

        // don't lock the audio driver before checking that...
        if ( nRow >= (int)pPatternList->get_size() || nRow < 0 || nColumn < 0 ) { return; }
        AudioEngine::get_instance()->lock( "SongEditor::mousePressEvent" );


        SongEditorActionMode actionMode = HydrogenApp::getInstance()->getSongEditorPanel()->getActionMode();
        if ( actionMode == SELECT_ACTION ) {

                bool bOverExistingPattern = false;
                for ( uint i = 0; i < m_selectedCells.size(); i++ ) {
                        QPoint cell = m_selectedCells[ i ];
                        if ( cell.x() == nColumn && cell.y() == nRow ) {
                                bOverExistingPattern = true;
                                break;
                        }
                }

                if ( bOverExistingPattern ) {
                        // MOVE PATTERNS
//                      INFOLOG( "[mousePressEvent] Move patterns" );
                        m_bIsMoving = true;
                        m_bShowLasso = false;
                        m_movingCells = m_selectedCells;

                        m_clickPoint.setX( nColumn );
                        m_clickPoint.setY( nRow );
                }
                else {
//                      INFOLOG( "[mousePressEvent] Select patterns" );
                        // select patterns
                        m_bShowLasso = true;
                        m_lasso.setCoords( ev->x(), ev->y(), ev->x(), ev->y() );
                        setCursor( QCursor( Qt::CrossCursor ) );
                        m_selectedCells.clear();
                        m_selectedCells.push_back( QPoint( nColumn, nRow ) );
                }
        }
        else if ( actionMode == DRAW_ACTION ) {
                H2Core::Pattern *pPattern = pPatternList->get( nRow );
                vector<PatternList*> *pColumns = pSong->get_pattern_group_vector();     // E' la lista di "colonne" di pattern
                if ( nColumn < (int)pColumns->size() ) {
                        PatternList *pColumn = ( *pColumns )[ nColumn ];

                        bool bFound = false;
                        unsigned nColumnIndex = 0;
                        for ( nColumnIndex = 0; nColumnIndex < pColumn->get_size(); nColumnIndex++) {
                                if ( pColumn->get( nColumnIndex ) == pPattern ) { // il pattern e' gia presente
                                        bFound = true;
                                        break;
                                }
                        }

                        if ( bFound ) {
                                // DELETE PATTERN
//                              INFOLOG( "[mousePressEvent] delete pattern" );
                                pColumn->del( nColumnIndex );

                                // elimino le colonne vuote
                                for ( int i = pColumns->size() - 1; i >= 0; i-- ) {
                                        PatternList *pColumn = ( *pColumns )[ i ];
                                        if ( pColumn->get_size() == 0 ) {
                                                pColumns->erase( pColumns->begin() + i );
                                                delete pColumn;
                                        }
                                        else {
                                                break;
                                        }
                                }
                        }
                        else {
                                if ( nColumn < (int)pColumns->size() ) {
                                        // ADD PATTERN
//                                      INFOLOG( "[mousePressEvent] add pattern" );
                                        m_selectedCells.clear();
                                        pColumn->add( pPattern );
                                }
                        }
                }
                else {
                        // ADD PATTERN (with spaces..)
                        m_selectedCells.clear();
                        int nSpaces = nColumn - pColumns->size();
//                      INFOLOG( "[mousePressEvent] add pattern (with " + to_string( nSpaces ) + " spaces)" );

                        PatternList *pColumn = new PatternList();
                        pColumns->push_back( pColumn );

                        for ( int i = 0; i < nSpaces; i++ ) {
                                pColumn = new PatternList();
                                pColumns->push_back( pColumn );
                        }
                        pColumn->add( pPattern );
                }
                pSong->__is_modified = true;
        }

        AudioEngine::get_instance()->unlock();

        // update
        m_bSequenceChanged = true;
        update();
}



void SongEditor::mouseMoveEvent(QMouseEvent *ev)
{
        int nRow = ev->y() / m_nGridHeight;
        int nColumn = ( (int)ev->x() - 10 ) / (int)m_nGridWidth;
        PatternList *pPatternList = Hydrogen::get_instance()->getSong()->get_pattern_list();
        vector<PatternList*>* pColumns = Hydrogen::get_instance()->getSong()->get_pattern_group_vector();

        if ( m_bIsMoving ) {
//              WARNINGLOG( "[mouseMoveEvent] Move patterns not implemented yet" );

                int nRowDiff = nRow  - m_clickPoint.y();
                int nColumnDiff = nColumn - m_clickPoint.x();

//              INFOLOG( "[mouseMoveEvent] row diff: "+ to_string( nRowDiff ) );
//              INFOLOG( "[mouseMoveEvent] col diff: "+ to_string( nColumnDiff ) );

                for ( int i = 0; i < (int)m_movingCells.size(); i++ ) {
                        QPoint cell = m_movingCells[ i ];
                        m_movingCells[ i ].setX( m_selectedCells[ i ].x() + nColumnDiff );
                        m_movingCells[ i ].setY( m_selectedCells[ i ].y() + nRowDiff );
                }

                m_bSequenceChanged = true;
                update();
                return;
        }

        if ( m_bShowLasso ) {
                // SELECTION
                setCursor( QCursor( Qt::CrossCursor ) );
                int x = ev->x();
                int y = ev->y();
                if ( x < 0 ) {
                        x = 0;
                }
                if ( y < 0 ) {
                        y = 0;
                }
                m_lasso.setBottomRight( QPoint( x, y ) );

                // aggiorno la lista di celle selezionate
                m_selectedCells.clear();

                int nStartColumn = (int)( ( m_lasso.left() - 10.0 ) / m_nGridWidth );
                int nEndColumn = nColumn;
                if ( nStartColumn > nEndColumn ) {
                        int nTemp = nEndColumn;
                        nEndColumn = nStartColumn;
                        nStartColumn = nTemp;
                }

                int nStartRow = m_lasso.top() / m_nGridHeight;
                int nEndRow = nRow;
                if ( nStartRow > nEndRow ) {
                        int nTemp = nEndRow;
                        nEndRow = nStartRow;
                        nStartRow = nTemp;
                }

                for ( int nRow = nStartRow; nRow <= nEndRow; nRow++ ) {
                        for ( int nCol = nStartColumn; nCol <= nEndColumn; nCol++ ) {
                                if ( nRow >= (int)pPatternList->get_size() || nRow < 0 || nCol < 0 ) {
                                        return;
                                }
                                H2Core::Pattern *pPattern = pPatternList->get( nRow );

                                if ( nCol < (int)pColumns->size() ) {
                                        PatternList *pColumn = ( *pColumns )[ nCol ];

                                        for ( uint i = 0; i < pColumn->get_size(); i++) {
                                                if ( pColumn->get(i) == pPattern ) { // esiste un pattern in questa posizione
                                                        m_selectedCells.push_back( QPoint( nCol, nRow ) );
                                                }
                                        }
                                }
                        }
                }

                m_bSequenceChanged = true;
                update();
        }

}



void SongEditor::mouseReleaseEvent( QMouseEvent *ev )
{
        UNUSED( ev );
//      INFOLOG( "[mouseReleaseEvent]" );

        Hydrogen *pEngine = Hydrogen::get_instance();

        PatternList *pPatternList = pEngine->getSong()->get_pattern_list();
        vector<PatternList*>* pColumns = pEngine->getSong()->get_pattern_group_vector();

        if ( m_bIsMoving ) {    // fine dello spostamento dei pattern
                AudioEngine::get_instance()->lock( "SongEditor::mouseReleaseEvent" );
                // create the new patterns
                for ( uint i = 0; i < m_movingCells.size(); i++ ) {
                        QPoint cell = m_movingCells[ i ];
                        if ( cell.x() < 0 || cell.y() < 0 || cell.y() >= (int)pPatternList->get_size() ) {
                                // skip
                                continue;
                        }
                        // aggiungo un pattern per volta
                        PatternList* pColumn = NULL;
                        if ( cell.x() < (int)pColumns->size() ) {
                                pColumn = (*pColumns)[ cell.x() ];
                        }
                        else {
                                // creo dei patternlist vuoti
                                int nSpaces = cell.x() - pColumns->size();
                                for ( int i = 0; i <= nSpaces; i++ ) {
                                        pColumn = new PatternList();
                                        pColumns->push_back( pColumn );
                                }
                        }
                        pColumn->add( pPatternList->get( cell.y() ) );
                }

                if ( m_bIsCtrlPressed ) {       // COPY
                }
                else {  // MOVE
                        // remove the old patterns
                        for ( uint i = 0; i < m_selectedCells.size(); i++ ) {
                                QPoint cell = m_selectedCells[ i ];
                                PatternList* pColumn = NULL;
                                if ( cell.x() < (int)pColumns->size() ) {
                                        pColumn = (*pColumns)[ cell.x() ];
                                }
                                else {
                                        pColumn = new PatternList();
                                        pColumns->push_back( pColumn );
                                }
                                pColumn->del(pPatternList->get( cell.y() ) );
                        }
                }

                // remove the empty patternlist at the end of the song
                for ( int i = pColumns->size() - 1; i != 0 ; i-- ) {
                        PatternList *pList = (*pColumns)[ i ];
                        int nSize = pList->get_size();
                        if ( nSize == 0 ) {
                                pColumns->erase( pColumns->begin() + i );
                                delete pList;
                        }
                        else {
                                break;
                        }
                }


                pEngine->getSong()->__is_modified = true;
                AudioEngine::get_instance()->unlock();

                m_bIsMoving = false;
                m_movingCells.clear();
                m_selectedCells.clear();
        }

        setCursor( QCursor( Qt::ArrowCursor ) );

        m_bShowLasso = false;
        m_bSequenceChanged = true;
        m_bIsCtrlPressed = false;
        update();
}



void SongEditor::paintEvent( QPaintEvent *ev )
{
/*      INFOLOG(
                        "[paintEvent] x: " + to_string( ev->rect().x() ) +
                        " y: " + to_string( ev->rect().y() ) +
                        " w: " + to_string( ev->rect().width() ) +
                        " h: " + to_string( ev->rect().height() )
        );
*/

        // ridisegno tutto solo se sono cambiate le note
        if (m_bSequenceChanged) {
                m_bSequenceChanged = false;
                drawSequence();
        }

        QPainter painter(this);
        painter.drawPixmap( ev->rect(), *m_pSequencePixmap, ev->rect() );

        if ( m_bShowLasso ) {
                QPen pen( Qt::white );
                pen.setStyle( Qt::DotLine );
                painter.setPen( pen );
                painter.drawRect( m_lasso );
        }
}



void SongEditor::createBackground()
{
        UIStyle *pStyle = Preferences::getInstance()->getDefaultUIStyle();
        QColor backgroundColor( pStyle->m_songEditor_backgroundColor.getRed(), pStyle->m_songEditor_backgroundColor.getGreen(), pStyle->m_songEditor_backgroundColor.getBlue() );
        QColor alternateRowColor( pStyle->m_songEditor_alternateRowColor.getRed(), pStyle->m_songEditor_alternateRowColor.getGreen(), pStyle->m_songEditor_alternateRowColor.getBlue() );
        QColor linesColor( pStyle->m_songEditor_lineColor.getRed(), pStyle->m_songEditor_lineColor.getGreen(), pStyle->m_songEditor_lineColor.getBlue() );

        Hydrogen *pEngine = Hydrogen::get_instance();
        Song *pSong = pEngine->getSong();

        uint nPatterns = pSong->get_pattern_list()->get_size();

        static int nOldHeight = -1;
        int nNewHeight = m_nGridHeight * nPatterns;

        if (nOldHeight != nNewHeight) { 
                // cambiamento di dimensioni...
                if (nNewHeight == 0) {
                        nNewHeight = 1; // the pixmap should not be empty
                }

                m_pBackgroundPixmap = new QPixmap( width(), nNewHeight );       // initialize the pixmap
                m_pSequencePixmap = new QPixmap( width(), nNewHeight ); // initialize the pixmap
                this->resize( QSize( width(), nNewHeight ) );
        }

        m_pBackgroundPixmap->fill( alternateRowColor );

        QPainter p( m_pBackgroundPixmap );
        p.setPen( linesColor );

/*      // sfondo per celle scure (alternato)
        for (uint i = 0; i < nPatterns; i++) {
                if ( ( i % 2) != 0) {
                        uint y = m_nGridHeight * i;
                        p.fillRect ( 0, y, m_nMaxPatternSequence * m_nGridWidth, 2, backgroundColor );
                        p.fillRect ( 0, y + 2, m_nMaxPatternSequence * m_nGridWidth, m_nGridHeight - 4, alternateRowColor );
                        p.fillRect ( 0, y + m_nGridHeight - 2, m_nMaxPatternSequence * m_nGridWidth, 2, backgroundColor );
                }
        }
*/
        // celle...
        p.setPen( linesColor );

        // vertical lines
        for (uint i = 0; i < m_nMaxPatternSequence + 1; i++) {
                uint x = 10 + i * m_nGridWidth;
                int x1 = x;
                int x2 = x + m_nGridWidth;

                p.drawLine( x1, 0, x1, m_nGridHeight * nPatterns );
                p.drawLine( x2, 0, x2, m_nGridHeight * nPatterns );
        }

        p.setPen( linesColor );
        // horizontal lines
        for (uint i = 0; i < nPatterns; i++) {
                uint y = m_nGridHeight * i;

                int y1 = y + 2;
                int y2 = y + m_nGridHeight - 2;

                p.drawLine( 0, y1, (m_nMaxPatternSequence * m_nGridWidth), y1 );
                p.drawLine( 0, y2, (m_nMaxPatternSequence * m_nGridWidth), y2 );
        }


        p.setPen( backgroundColor );
        // horizontal lines (erase..)
        for (uint i = 0; i < nPatterns + 1; i++) {
                uint y = m_nGridHeight * i;

                p.fillRect( 0, y, m_nMaxPatternSequence * m_nGridWidth, 2, backgroundColor );
                p.drawLine( 0, y + m_nGridHeight - 1, m_nMaxPatternSequence * m_nGridWidth, y + m_nGridHeight - 1 );
        }

        //~ celle
        m_bSequenceChanged = true;
}

void SongEditor::cleanUp(){

        delete m_pBackgroundPixmap;
        delete m_pSequencePixmap;
}

void SongEditor::drawSequence()
{
        QPainter p;
        p.begin( m_pSequencePixmap );
        p.drawPixmap( rect(), *m_pBackgroundPixmap, rect() );
        p.end();

        Song* song = Hydrogen::get_instance()->getSong();
        PatternList *patList = song->get_pattern_list();
        vector<PatternList*>* pColumns = song->get_pattern_group_vector();
        uint listLength = patList->get_size();
        for (uint i = 0; i < pColumns->size(); i++) {
                PatternList* pColumn = (*pColumns)[ i ];

                for (uint nPat = 0; nPat < pColumn->get_size(); ++nPat) {
                        H2Core::Pattern *pat = pColumn->get( nPat );

                        int position = -1;
                        // find the position in pattern list
                        for (uint j = 0; j < listLength; j++) {
                                H2Core::Pattern *pat2 = patList->get( j );
                                if (pat == pat2) {
                                        position = j;
                                        break;
                                }
                        }
                        if (position == -1) {
                                WARNINGLOG( "[drawSequence] position == -1, group = " + to_string( i ) );
                        }
                        drawPattern( i, position );
                }
        }

        // Moving cells
        p.begin( m_pSequencePixmap );
//      p.setRasterOp( Qt::XorROP );

// comix: this composition mode seems to be not available on Mac
        p.setCompositionMode( QPainter::CompositionMode_Xor );
        QPen pen( Qt::gray );
        pen.setStyle( Qt::DotLine );
        p.setPen( pen );
        for ( uint i = 0; i < m_movingCells.size(); i++ ) {
                int x = 10 + m_nGridWidth * ( m_movingCells[ i ] ).x();
                int y = m_nGridHeight * ( m_movingCells[ i ] ).y();

                QColor patternColor;
                patternColor.setRgb( 255, 255, 255 );
                p.fillRect( x + 2, y + 4, m_nGridWidth - 3, m_nGridHeight - 7, patternColor );
        }

}



void SongEditor::drawPattern( int pos, int number )
{
        Preferences *pref = Preferences::getInstance();
        UIStyle *pStyle = pref->getDefaultUIStyle();
        QPainter p( m_pSequencePixmap );
        QColor patternColor( pStyle->m_songEditor_pattern1Color.getRed(), pStyle->m_songEditor_pattern1Color.getGreen(), pStyle->m_songEditor_pattern1Color.getBlue() );

        bool bIsSelected = false;
        for ( uint i = 0; i < m_selectedCells.size(); i++ ) {
                QPoint point = m_selectedCells[ i ];
                if ( point.x() == pos && point.y() == number ) {
                        bIsSelected = true;
                        break;
                }
        }

        if ( bIsSelected ) {
                patternColor = patternColor.dark( 130 );
        }

        int x = 10 + m_nGridWidth * pos;
        int y = m_nGridHeight * number;

//      p.setPen( patternColor.light( 120 ) );  // willie - For the bevel - haven't yet figured how it's supposed to work...
        p.fillRect( x + 1, y + 3, m_nGridWidth - 1, m_nGridHeight - 5, patternColor );
}





// :::::::::::::::::::





SongEditorPatternList::SongEditorPatternList( QWidget *parent )
 : QWidget( parent )
 , Object( "SongEditorPatternList" )
 , EventListener()
 , m_pBackgroundPixmap( NULL )
{
        m_nWidth = 200;
        m_nGridHeight = 18;
        setAttribute(Qt::WA_NoBackground);
        
        setAcceptDrops(true);

        patternBeingEdited = NULL;
        
        line = new QLineEdit( "Inline Pattern Name", this );
        line->setFrame( false );
        line->hide();
        connect( line, SIGNAL(editingFinished()), this, SLOT(inlineEditingFinished()) );
        connect( line, SIGNAL(returnPressed()), this, SLOT(inlineEditingEntered()) );

        this->resize( m_nWidth, m_nInitialHeight );

        m_labelBackgroundLight.load( Skin::getImagePath() + "/songEditor/songEditorLabelBG.png" );
        m_labelBackgroundDark.load( Skin::getImagePath() + "/songEditor/songEditorLabelABG.png" );
        m_labelBackgroundSelected.load( Skin::getImagePath() + "/songEditor/songEditorLabelSBG.png" );
        m_playingPattern_on_Pixmap.load( Skin::getImagePath() + "/songEditor/playingPattern_on.png" );
        m_playingPattern_off_Pixmap.load( Skin::getImagePath() + "/songEditor/playingPattern_off.png" );

        m_pPatternPopup = new QMenu( this );
        m_pPatternPopup->addAction( trUtf8("Edit"),  this, SLOT( patternPopup_edit() ) );
        m_pPatternPopup->addAction( trUtf8("Copy"),  this, SLOT( patternPopup_copy() ) );
        m_pPatternPopup->addAction( trUtf8("Delete"),  this, SLOT( patternPopup_delete() ) );
        m_pPatternPopup->addAction( trUtf8("Fill/Clear ..."),  this, SLOT( patternPopup_fill() ) );
        m_pPatternPopup->addAction( trUtf8("Properties"),  this, SLOT( patternPopup_properties() ) );
        m_pPatternPopup->addAction( trUtf8("Load Pattern"),  this, SLOT( patternPopup_load() ) );
        m_pPatternPopup->addAction( trUtf8("Save Pattern"),  this, SLOT( patternPopup_save() ) );

        HydrogenApp::getInstance()->addEventListener( this );

        createBackground();
        update();
}



SongEditorPatternList::~SongEditorPatternList()
{
}


void SongEditorPatternList::patternChangedEvent() {
        createBackground();
        update();
}


/// Single click, select the next pattern
void SongEditorPatternList::mousePressEvent( QMouseEvent *ev )
{
        int row = (ev->y() / m_nGridHeight);

        Hydrogen *engine = Hydrogen::get_instance();
        Song *song = engine->getSong();
        PatternList *patternList = song->get_pattern_list();

        if ( row >= (int)patternList->get_size() ) {
                return;
        }

        if ( (ev->button() == Qt::MidButton) || (ev->modifiers() == Qt::ControlModifier && ev->button() == Qt::RightButton) || (ev->modifiers() == Qt::ControlModifier && ev->button() == Qt::LeftButton) ){
                togglePattern( row );
        } else {
                engine->setSelectedPatternNumber( row );
                if (ev->button() == Qt::RightButton)  {
        /*
                        if ( song->getMode() == Song::PATTERN_MODE ) {
        
                                PatternList *pCurrentPatternList = engine->getCurrentPatternList();
                                if ( pCurrentPatternList->get_size() == 0 ) {
                                        // nessun pattern e' attivo. seleziono subito questo.
                                        pCurrentPatternList->add( patternList->get( row ) );
                                }
                                else {
                                        engine->setNextPattern( row );
                                }
                        }
        */
                        m_pPatternPopup->popup( QPoint( ev->globalX(), ev->globalY() ) );
                }
        }

        createBackground();
        update();
}


///
/// Start/stop playing a pattern in "pattern mode"
///
void SongEditorPatternList::togglePattern( int row ) {

        Hydrogen *engine = Hydrogen::get_instance();
/*      Song *song = engine->getSong();
        PatternList *patternList = song->get_pattern_list();*/

//      PatternList *pCurrentPatternList = engine->getCurrentPatternList();

//      bool isPatternPlaying = false;
        engine->sequencer_setNextPattern( row, false, true );

//      for ( uint i = 0; i < pCurrentPatternList->get_size(); ++i ) {
//              if ( pCurrentPatternList->get( i ) == patternList->get( row ) ) {
//                      // the pattern is already playing, stop it!
//                      isPatternPlaying = true;
//                      break;
//              }
//      }
//
//      if ( isPatternPlaying ) {
//              //pCurrentPatternList->del( patternList->get( row ) );
//              engine->sequencer_setNextPattern( row, false, true );   // remove from the playing pattern list
//      }
//      else {
//              // the pattern is not playing, add it to the list
//              //pCurrentPatternList->add( patternList->get( row ) );
//              engine->sequencer_setNextPattern( row, true, false );   // add to the playing pattern list
//      }

        createBackground();
        update();
}


void SongEditorPatternList::mouseDoubleClickEvent( QMouseEvent *ev )
{
        int row = (ev->y() / m_nGridHeight);
        inlineEditPatternName( row );
}

void SongEditorPatternList::inlineEditPatternName( int row )
{
        Hydrogen *engine = Hydrogen::get_instance();
        Song *song = engine->getSong();
        PatternList *patternList = song->get_pattern_list();

        if ( row >= (int)patternList->get_size() ) {
                return;
        }
        patternBeingEdited = patternList->get( row );
        line->setGeometry( 23, row * m_nGridHeight , m_nWidth - 23, m_nGridHeight  );
        line->setText( patternBeingEdited->get_name() );
        line->selectAll();
        line->show();
        line->setFocus();
}

void SongEditorPatternList::inlineEditingEntered()
{
        assert( patternBeingEdited != NULL );
        if ( PatternPropertiesDialog::nameCheck( line->text() ) )
        {
                patternBeingEdited->set_name( line->text() );
                Hydrogen::get_instance()->getSong()->__is_modified = true;
                EventQueue::get_instance()->push_event( EVENT_SELECTED_PATTERN_CHANGED, -1 );
                createBackground();
                update();
        }
//      patternBeingEdited = NULL;
}


void SongEditorPatternList::inlineEditingFinished()
{
        patternBeingEdited = NULL;
        line->hide();
}


void SongEditorPatternList::paintEvent( QPaintEvent *ev )
{
        QPainter painter(this);
        painter.drawPixmap( ev->rect(), *m_pBackgroundPixmap, ev->rect() );
}



void SongEditorPatternList::updateEditor()
{
        if(!isVisible()) {
                return;
        }

        update();
}



void SongEditorPatternList::createBackground()
{
        Preferences *pref = Preferences::getInstance();
        UIStyle *pStyle = pref->getDefaultUIStyle();
        QColor textColor( pStyle->m_songEditor_textColor.getRed(), pStyle->m_songEditor_textColor.getGreen(), pStyle->m_songEditor_textColor.getBlue() );

        QString family = pref->getApplicationFontFamily();
        int size = pref->getApplicationFontPointSize();
        QFont textFont( family, size );

        QFont boldTextFont( textFont);
        boldTextFont.setPointSize(10);
        boldTextFont.setBold( true );

        Hydrogen *pEngine = Hydrogen::get_instance();
        Song *pSong = pEngine->getSong();
        int nPatterns = pSong->get_pattern_list()->get_size();
        int nSelectedPattern = pEngine->getSelectedPatternNumber();

        static int oldHeight = -1;
        int newHeight = m_nGridHeight * nPatterns;

        if (oldHeight != newHeight) {
                if (newHeight == 0) {
                        newHeight = 1;  // the pixmap should not be empty
                }
                delete m_pBackgroundPixmap;
                m_pBackgroundPixmap = new QPixmap( m_nWidth, newHeight );       // initialize the pixmap
                this->resize( m_nWidth, newHeight );
        }
        m_pBackgroundPixmap->fill( Qt::black );

        QPainter p( m_pBackgroundPixmap );
        p.setFont( boldTextFont );

        for ( int i = 0; i < nPatterns; i++ ) {
                uint y = m_nGridHeight * i;
                if ( i == nSelectedPattern ) {
                        p.drawPixmap( QPoint( 0, y ), m_labelBackgroundSelected );
                }
                else {
                        if ( ( i % 2) == 0 ) {
                                p.drawPixmap( QPoint( 0, y ), m_labelBackgroundDark );
                        }
                        else {
                                p.drawPixmap( QPoint( 0, y ), m_labelBackgroundLight );
                        }
                }
        }

        PatternList *pCurrentPatternList = pEngine->getCurrentPatternList();

        /// paint the foreground (pattern name etc.)
        for ( int i = 0; i < nPatterns; i++ ) {
                H2Core::Pattern *pPattern = pSong->get_pattern_list()->get(i);
                //uint y = m_nGridHeight * i;

                // Text
                bool bNext = false, bActive = false;
/*              for (uint j = 0; j < pCurrentPatternList->get_size(); j++) {
                        if ( pPattern == pCurrentPatternList->get(j) ) {
                                bActive = true;
                                break;
                        }
                }*/
                if ( pCurrentPatternList->index_of( pPattern ) != -1 ) bActive = true;
                if ( pEngine->getNextPatterns()->index_of( pPattern ) != -1 ) bNext = true;

                if ( i == nSelectedPattern ) {
                        p.setPen( QColor( 0,0,0 ) );
                }
                else {
                        p.setPen( textColor );
                }

                uint text_y = i * m_nGridHeight;
                if ( bNext ) {
                        p.drawPixmap( QPoint( 5, text_y + 3 ), m_playingPattern_off_Pixmap );
                }
                else if (bActive) {
//                      p.drawText( 5, text_y - 1 - m_nGridHeight, m_nWidth - 25, m_nGridHeight + 2, Qt::AlignVCenter, ">" );
                
                        //mark active pattern with triangular
                        if( ! pref->patternModePlaysSelected() ){
                                p.drawPixmap( QPoint( 5, text_y + 3 ), m_playingPattern_on_Pixmap );
                        }
                }


                p.drawText( 25, text_y - 1, m_nWidth - 25, m_nGridHeight + 2, Qt::AlignVCenter, pPattern->get_name() );
        }

}



void SongEditorPatternList::patternPopup_load()
{

        Hydrogen *engine = Hydrogen::get_instance();
        int tmpselectedpatternpos = engine->getSelectedPatternNumber();
        Song *song = engine->getSong();
        PatternList *pPatternList = song->get_pattern_list();
        Instrument *instr = song->get_instrument_list()->get( 0 );
        assert( instr );
        
        QDir dirPattern( Preferences::getInstance()->getDataDirectory() + "/patterns" );
        QFileDialog *fd = new QFileDialog(this);
        fd->setFileMode(QFileDialog::ExistingFile);
        fd->setFilter( trUtf8("Hydrogen Pattern (*.h2pattern)") );
        fd->setDirectory(dirPattern );

        fd->setWindowTitle( trUtf8( "Open Pattern" ) );

        QString filename = "";
        if (fd->exec() == QDialog::Accepted) {
                filename = fd->selectedFiles().first();
        }
        else
        {
                return;
        }

        LocalFileMng mng;
        LocalFileMng fileMng;
        Pattern* err = fileMng.loadPattern( filename );
        if ( err == 0 ) {
                _ERRORLOG( "Error loading the pattern" );
        }else{
                H2Core::Pattern *pNewPattern = err;
                pPatternList->add( pNewPattern );
                song->__is_modified = true;
                createBackground();
                update();
        }

        int listsize = pPatternList->get_size();
        engine->setSelectedPatternNumber( listsize -1 );
        Pattern *pTemp = pPatternList->get( engine->getSelectedPatternNumber() );
        pPatternList->replace( pPatternList->get( tmpselectedpatternpos ), listsize -1);
        pPatternList->replace( pTemp, tmpselectedpatternpos );
        listsize = pPatternList->get_size();
        engine->setSelectedPatternNumber( listsize -1 );
        patternPopup_delete();
        engine->setSelectedPatternNumber( tmpselectedpatternpos );
        HydrogenApp::getInstance()->getSongEditorPanel()->updateAll();

}



void SongEditorPatternList::patternPopup_save()
{       
        Hydrogen *engine = Hydrogen::get_instance();
        int nSelectedPattern = engine->getSelectedPatternNumber();
        Song *song = engine->getSong();
        Pattern *pat = song->get_pattern_list()->get( nSelectedPattern );

        QString patternname = pat->get_name();
        QString realpatternname = patternname;

        LocalFileMng fileMng;
        int err = fileMng.savePattern( song , nSelectedPattern, patternname, realpatternname, 1 );
        if ( err != 0 ) {
                switch ( err ){
                        case 1: //file exists 
                                QMessageBox::information ( this, "Hydrogen", trUtf8 ( "Error saving pattern!\nThe pattern-file exists." ));
                                return; //exit patternPopup_save without update the drumkitlist 
                        default: //anything else
                                _ERRORLOG( "Error saving the pattern" );
                                break;

        }
        }

#ifdef WIN32
        Sleep ( 10 );
#else
        usleep ( 10000 );
#endif 
        HydrogenApp::getInstance()->getInstrumentRack()->getSoundLibraryPanel()->test_expandedItems();
        HydrogenApp::getInstance()->getInstrumentRack()->getSoundLibraryPanel()->updateDrumkitList();
}



void SongEditorPatternList::patternPopup_edit()
{
        HydrogenApp::getInstance()->getPatternEditorPanel()->show();
        HydrogenApp::getInstance()->getPatternEditorPanel()->setFocus();
}



void SongEditorPatternList::patternPopup_properties()
{
        Hydrogen *engine = Hydrogen::get_instance();
        Song *song = engine->getSong();
        PatternList *patternList = song->get_pattern_list();

        int nSelectedPattern = engine->getSelectedPatternNumber();
        H2Core::Pattern *pattern = patternList->get( nSelectedPattern );

        PatternPropertiesDialog *dialog = new PatternPropertiesDialog(this, pattern);
        if (dialog->exec() == QDialog::Accepted) {
//              Hydrogen *engine = Hydrogen::get_instance();
//              Song *song = engine->getSong();
                song->__is_modified = true;
                EventQueue::get_instance()->push_event( EVENT_SELECTED_PATTERN_CHANGED, -1 );
                createBackground();
                update();
        }
        delete dialog;
        dialog = NULL;
}



void SongEditorPatternList::patternPopup_delete()
{
        Hydrogen *pEngine = Hydrogen::get_instance();

//      int state = engine->getState();
//      // per ora non lascio possibile la cancellazione del pattern durante l'esecuzione
//      // da togliere quando correggo il bug
//         if (state == PLAYING) {
//                 QMessageBox::information( this, "Hydrogen", trUtf8("Can't delete the pattern while the audio engine is playing"));
//                 return;
//         }

        if ( pEngine->getSong()->get_mode() == Song::PATTERN_MODE ) {
                pEngine->sequencer_setNextPattern( -1, false, false );  // reimposto il prossimo pattern a NULL, altrimenti viene scelto quello che sto distruggendo ora...
        }

//      pEngine->sequencer_stop();

// "lock engine" I am not sure, but think this is unnecessarily. -wolke-
//      AudioEngine::get_instance()->lock( "SongEditorPatternList::patternPopup_delete" );

        Song *song = pEngine->getSong();
        PatternList *pSongPatternList = song->get_pattern_list();

        H2Core::Pattern *pattern = pSongPatternList->get( pEngine->getSelectedPatternNumber() );
        INFOLOG( "[patternPopup_delete] Delete pattern: " + pattern->get_name() + " @" + to_string( (long)pattern ) );
        pSongPatternList->del(pattern);

        vector<PatternList*> *patternGroupVect = song->get_pattern_group_vector();

        uint i = 0;
        while (i < patternGroupVect->size() ) {
                PatternList *list = (*patternGroupVect)[i];

                uint j = 0;
                while ( j < list->get_size() ) {
                        H2Core::Pattern *pOldPattern = list->get( j );
                        if (pOldPattern == pattern ) {
                                list->del( j );
                                continue;
                        }
                        j++;
                }
//              for (uint j = 0; j < list->get_size(); j++) {
//                      Pattern *pOldPattern = list->get( j );
//                      if (pOldPattern == pattern ) {
//                              list->del( j );
//                      }
//              }

/*              if (list->get_size() == 0 ) {
                        patternGroupVect->erase( patternGroupVect->begin() + i );
                        delete list;
                        list = NULL;
                }
                else {
*/                      i++;
//              }
        }


        PatternList *list = pEngine->getCurrentPatternList();
        list->del( pattern );
        // se esiste, seleziono il primo pattern
        if ( pSongPatternList->get_size() > 0 ) {
                H2Core::Pattern *pFirstPattern = pSongPatternList->get( 0 );
                list->add( pFirstPattern );
                // Cambio due volte...cosi' il pattern editor viene costretto ad aggiornarsi
                pEngine->setSelectedPatternNumber( -1 );
                pEngine->setSelectedPatternNumber( 0 );
        }
        else {
                // there's no patterns..        
                Pattern *emptyPattern = Pattern::get_empty_pattern();
                emptyPattern->set_name( trUtf8("Pattern 1") );
                emptyPattern->set_category( trUtf8("not_categorized") );
                pSongPatternList->add( emptyPattern );
                pEngine->setSelectedPatternNumber( -1 );
                pEngine->setSelectedPatternNumber( 0 );
        }

        delete pattern;

        song->__is_modified = true;

// "unlock" I am not sure, but think this is unnecessarily. -wolke-
//      AudioEngine::get_instance()->unlock();

        ( HydrogenApp::getInstance() )->getSongEditorPanel()->updateAll();
}



void SongEditorPatternList::patternPopup_copy()
{
        Hydrogen *pEngine = Hydrogen::get_instance();
        Song *pSong = pEngine->getSong();
        PatternList *pPatternList = pSong->get_pattern_list();
        int nSelectedPattern = pEngine->getSelectedPatternNumber();
        H2Core::Pattern *pPattern = pPatternList->get( nSelectedPattern );

        H2Core::Pattern *pNewPattern = pPattern->copy();
        pPatternList->add( pNewPattern );

        // rename the copied pattern
        PatternPropertiesDialog *dialog = new PatternPropertiesDialog( this, pNewPattern );
        if ( dialog->exec() == QDialog::Accepted ) {
                pSong->__is_modified = true;
                pEngine->setSelectedPatternNumber(pPatternList->get_size() - 1);        // select the last pattern (the copied one)
                if (pSong->get_mode() == Song::PATTERN_MODE) {
                        pEngine->sequencer_setNextPattern( pPatternList->get_size() - 1, false, false );        // select the last pattern (the new copied pattern)
                }
        }
        else {
                pPatternList->del( pNewPattern );
                delete pNewPattern;
        }
        delete dialog;

        HydrogenApp::getInstance()->getSongEditorPanel()->updateAll();
}

void SongEditorPatternList::patternPopup_fill()
{
        Hydrogen *pEngine = Hydrogen::get_instance();
        int nSelectedPattern = pEngine->getSelectedPatternNumber();
        FillRange range;
        PatternFillDialog *dialog = new PatternFillDialog( this, &range );
        SongEditorPanel *pSEPanel = HydrogenApp::getInstance()->getSongEditorPanel();


        // use a PatternFillDialog to get the range and mode data
        if ( dialog->exec() == QDialog::Accepted ) {
                fillRangeWithPattern(&range, nSelectedPattern);
                pSEPanel->updateAll();
        }

        delete dialog;

}


void SongEditorPatternList::fillRangeWithPattern(FillRange* pRange, int nPattern)
{
        Hydrogen *pEngine = Hydrogen::get_instance();
        AudioEngine::get_instance()->lock( "SongEditorPatternList::fillRangeWithPattern" );


        Song *pSong = pEngine->getSong();
        PatternList *pPatternList = pSong->get_pattern_list();
        H2Core::Pattern *pPattern = pPatternList->get( nPattern );
        vector<PatternList*> *pColumns = pSong->get_pattern_group_vector();     // E' la lista di "colonne" di pattern
        PatternList *pColumn;

        int nColumn, nColumnIndex;
        bool bHasPattern = false;
        int fromVal = pRange->fromVal - 1;
        int toVal   = pRange->toVal;



        // Add patternlists to PatternGroupVector as necessary

        int nDelta = toVal - pColumns->size() + 1;

        for ( int i = 0; i < nDelta; i++ ) {
                pColumn = new PatternList();
                pColumns->push_back( pColumn );
        }


        // Fill or Clear each cell in range

        for ( nColumn = fromVal; nColumn < toVal; nColumn++ ) {

                // expand Pattern
                pColumn = ( *pColumns )[ nColumn ];

                bHasPattern = false;

                // check whether the pattern (and column) already exists
                for ( nColumnIndex = 0; pColumn && nColumnIndex < (int)pColumn->get_size(); nColumnIndex++) {

                        if ( pColumn->get( nColumnIndex ) == pPattern ) {
                                bHasPattern = true;
                                break;
                        }
                }

                if ( pRange->bInsert && !bHasPattern ) {       //fill
                        pColumn->add( pPattern);
                }
                else if ( !pRange->bInsert && bHasPattern ) {  // clear
                        pColumn->del( pPattern);
                }
        }

                // remove all the empty patternlists at the end of the song
                for ( int i = pColumns->size() - 1; i != 0 ; i-- ) {
                        PatternList *pList = (*pColumns)[ i ];
                        int nSize = pList->get_size();
                        if ( nSize == 0 ) {
                                pColumns->erase( pColumns->begin() + i );
                                delete pList;
                        }
                        else {
                                break;
                        }
                }
        AudioEngine::get_instance()->unlock();


        // Update
        pSong->__is_modified = true;
}


///drag & drop
void SongEditorPatternList::dragEnterEvent(QDragEnterEvent *event)
{
        if ( event->mimeData()->hasFormat("text/plain") ) {
                        event->acceptProposedAction();
        }
}


void SongEditorPatternList::dropEvent(QDropEvent *event)
{
        QString sText = event->mimeData()->text();

        if( sText.startsWith("Songs:") || sText.startsWith("move instrument:") ){
                event->acceptProposedAction();
                return;
        }

        if (sText.startsWith("move pattern:")) {
                Hydrogen *engine = Hydrogen::get_instance();
                int nSourcePattern = engine->getSelectedPatternNumber();

                int nTargetPattern = event->pos().y() / m_nGridHeight;

                if ( nSourcePattern == nTargetPattern ) {
                        event->acceptProposedAction();
                        return;
                }

                movePatternLine( nSourcePattern , nTargetPattern );

                event->acceptProposedAction();
        }else {


                PatternList *pPatternList = Hydrogen::get_instance()->getSong()->get_pattern_list();

                QStringList tokens = sText.split( "::" );
                QString sPatternName = tokens.at( 1 );

                int nTargetPattern = event->pos().y() / m_nGridHeight;

                LocalFileMng mng;
                Pattern* err = mng.loadPattern( sPatternName );
                if ( err == 0 ) {
                        _ERRORLOG( "Error loading the pattern" );
                }else{
                        H2Core::Pattern *pNewPattern = err;
                        pPatternList->add( pNewPattern );

                        for (int nPatr = pPatternList->get_size() +1 ; nPatr >= nTargetPattern; nPatr--) {
                                H2Core::Pattern *pPattern = pPatternList->get(nPatr - 1);
                                pPatternList->replace( pPattern, nPatr );
                        }
                        pPatternList->replace( pNewPattern, nTargetPattern );

                        Hydrogen::get_instance()->getSong()->__is_modified = true;
                        createBackground();
                        update();
                }
                HydrogenApp::getInstance()->getSongEditorPanel()->updateAll();
                event->acceptProposedAction();
                
        }
}



void SongEditorPatternList::movePatternLine( int nSourcePattern , int nTargetPattern )
{
                Hydrogen *engine = Hydrogen::get_instance();

                Song *pSong = engine->getSong();
                PatternList *pPatternList = pSong->get_pattern_list();



                // move instruments...
                H2Core::Pattern *pSourcePattern = pPatternList->get( nSourcePattern );//Instrument *pSourceInstr = pPatternList->get(nSourcePattern);
                if ( nSourcePattern < nTargetPattern) {
                        for (int nPatr = nSourcePattern; nPatr < nTargetPattern; nPatr++) {
                                H2Core::Pattern *pPattern = pPatternList->get(nPatr + 1);
                                pPatternList->replace( pPattern, nPatr );
                        }
                        pPatternList->replace( pSourcePattern, nTargetPattern );
                }
                else {
                        for (int nPatr = nSourcePattern; nPatr >= nTargetPattern; nPatr--) {
                                H2Core::Pattern *pPattern = pPatternList->get(nPatr - 1);
                                pPatternList->replace( pPattern, nPatr );
                        }
                        pPatternList->replace( pSourcePattern, nTargetPattern );
                }
                engine->setSelectedPatternNumber( nTargetPattern );
                HydrogenApp::getInstance()->getSongEditorPanel()->updateAll();
                
}


void SongEditorPatternList::mouseMoveEvent(QMouseEvent *event)
{
        if (!(event->buttons() & Qt::LeftButton)) {
                return;
        }
        if ( abs(event->pos().y() - __drag_start_position.y()) < (int)m_nGridHeight) {
                return;
        }


        QString sText = QString("move pattern:%1");

        QDrag *pDrag = new QDrag(this);
        QMimeData *pMimeData = new QMimeData;

        pMimeData->setText( sText );
        pDrag->setMimeData( pMimeData);
        //drag->setPixmap(iconPixmap);

        pDrag->start( Qt::CopyAction | Qt::MoveAction );

        QWidget::mouseMoveEvent(event);
}

// ::::::::::::::::::::::::::



SongEditorPositionRuler::SongEditorPositionRuler( QWidget *parent )
 : QWidget( parent )
 , Object( "SongEditorPositionRuler" )
{
        setAttribute(Qt::WA_NoBackground);

        m_nGridWidth = 16;

        resize( m_nInitialWidth, m_nHeight );
        setFixedHeight( m_nHeight );

        m_pBackgroundPixmap = new QPixmap( m_nInitialWidth, m_nHeight );        // initialize the pixmap

        createBackground();     // create m_backgroundPixmap pixmap

        // create tick position pixmap
        bool ok = m_tickPositionPixmap.load( Skin::getImagePath() + "/patternEditor/tickPosition.png" );
        if( ok == false ){
                ERRORLOG( "Error loading pixmap" );
        }

        update();

        m_pTimer = new QTimer(this);
        connect(m_pTimer, SIGNAL(timeout()), this, SLOT(updatePosition()));
        m_pTimer->start(200);
}



SongEditorPositionRuler::~SongEditorPositionRuler() {
        m_pTimer->stop();
}


uint SongEditorPositionRuler::getGridWidth()
{
        return m_nGridWidth;
}

void SongEditorPositionRuler::setGridWidth( uint width )
{
        if ( SONG_EDITOR_MIN_GRID_WIDTH <= width && SONG_EDITOR_MAX_GRID_WIDTH >= width )
        {
                m_nGridWidth = width;
                createBackground ();
        }
}


void SongEditorPositionRuler::createBackground()
{
        UIStyle *pStyle = Preferences::getInstance()->getDefaultUIStyle();
        QColor backgroundColor( pStyle->m_songEditor_backgroundColor.getRed(), pStyle->m_songEditor_backgroundColor.getGreen(), pStyle->m_songEditor_backgroundColor.getBlue() );
        QColor textColor( pStyle->m_songEditor_textColor.getRed(), pStyle->m_songEditor_textColor.getGreen(), pStyle->m_songEditor_textColor.getBlue() );
        QColor alternateRowColor( pStyle->m_songEditor_alternateRowColor.getRed(), pStyle->m_songEditor_alternateRowColor.getGreen(), pStyle->m_songEditor_alternateRowColor.getBlue() );

        m_pBackgroundPixmap->fill( backgroundColor );

        Preferences *pref = Preferences::getInstance();
        QString family = pref->getApplicationFontFamily();
        int size = pref->getApplicationFontPointSize();
        QFont font( family, size );

        QPainter p( m_pBackgroundPixmap );
        p.setFont( font );

        char tmp[10];
        for (uint i = 0; i < m_nMaxPatternSequence + 1; i++) {
                uint x = 10 + i * m_nGridWidth;
                if ( (i % 4) == 0 ) {
                        p.setPen( textColor );
                        sprintf( tmp, "%d", i + 1 );
                        p.drawText( x - m_nGridWidth, 0, m_nGridWidth * 2, height(), Qt::AlignCenter, tmp );
                }
                else {
                        p.setPen( textColor );
                        p.drawLine( x, 10, x, m_nHeight - 10 );
                }
        }

        p.setPen( QColor(35, 39, 51) );
        p.drawLine( 0, 0, width(), 0 );

        p.fillRect ( 0, height() - 3, width(), 2, alternateRowColor );

}



void SongEditorPositionRuler::mouseMoveEvent(QMouseEvent *ev)
{
        mousePressEvent( ev );
}



void SongEditorPositionRuler::mousePressEvent( QMouseEvent *ev )
{
        int column = (ev->x() / m_nGridWidth);

        if ( column >= (int)Hydrogen::get_instance()->getSong()->get_pattern_group_vector()->size() ) {
                return;
        }
        
        // disabling son relocates while in pattern mode as it causes weird behaviour. (jakob lund)
        if ( Hydrogen::get_instance()->getSong()->get_mode() == Song::PATTERN_MODE ) {
                return;
        }

        int nPatternPos = Hydrogen::get_instance()->getPatternPos();
        if ( nPatternPos != column ) {
                Hydrogen::get_instance()->setPatternPos( column );
                update();
        }
}



void SongEditorPositionRuler::paintEvent( QPaintEvent *ev )
{
        if (!isVisible()) {
                return;
        }
        
        Hydrogen *H = Hydrogen::get_instance();

        float fPos = H->getPatternPos();

        if ( H->getCurrentPatternList()->get_size() != 0 ) {
                H2Core::Pattern *pPattern = H->getCurrentPatternList()->get( 0 );
                fPos += (float)H->getTickPosition() / (float)pPattern->get_lenght();
        }
        else {
                // nessun pattern, uso la grandezza di default
                fPos += (float)H->getTickPosition() / (float)MAX_NOTES;
        }

        if ( H->getSong()->get_mode() == Song::PATTERN_MODE ) {
                fPos = -1;
        }

        QPainter painter(this);
        painter.drawPixmap( ev->rect(), *m_pBackgroundPixmap, ev->rect() );

        if (fPos != -1) {
                uint x = (int)( 10 + fPos * m_nGridWidth - 11 / 2 );
                painter.drawPixmap( QRect( x, height() / 2, 11, 8), m_tickPositionPixmap, QRect(0, 0, 11, 8) );
        }
}



void SongEditorPositionRuler::updatePosition()
{
        update();
}