root/trunk/gui/src/PatternEditor/PatternEditorPanel.cpp @ 377

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


#include "HydrogenApp.h"
#include "PatternEditorPanel.h"
#include "PatternEditorInstrumentList.h"
#include "PatternEditorRuler.h"
#include "NotePropertiesRuler.h"
#include "DrumPatternEditor.h"
#include "PianoRollEditor.h"

#include "../MainForm.h"
#include "../widgets/Button.h"
#include "../widgets/Fader.h"
#include "../widgets/PixmapWidget.h"
#include "../widgets/LCDCombo.h"

#include "../Skin.h"
#include "../SongEditor/SongEditorPanel.h"

#include <cmath>

#include <QtGui>

PatternEditorPanel::PatternEditorPanel( QWidget *pParent )
 : QWidget( pParent )
 , Object( "PatternEditorPanel" )
 , m_pPattern( NULL )
 , m_bEnablePatternResize( true )
{
        setAcceptDrops(true);

        Preferences *pPref = Preferences::getInstance();


// Editor TOP
        PixmapWidget *editor_top = new PixmapWidget(0);
        editor_top->setPixmap("/patternEditor/editor_top.png", true);
        editor_top->setFixedHeight(24);

        PixmapWidget *editor_top_2 = new PixmapWidget(0);
        editor_top_2->setPixmap("/patternEditor/editor_top.png", true);
        editor_top_2->setFixedHeight(24);

        QHBoxLayout *editor_top_hbox = new QHBoxLayout(editor_top);
        editor_top_hbox->setSpacing(0);
        editor_top_hbox->setMargin(0);
        editor_top_hbox->setAlignment(Qt::AlignLeft);

        QHBoxLayout *editor_top_hbox_2 = new QHBoxLayout(editor_top_2);
        editor_top_hbox_2->setSpacing(0);
        editor_top_hbox_2->setMargin(0);
        editor_top_hbox_2->setAlignment(Qt::AlignLeft);


//wolke some background images back_size_res
        PixmapWidget *pSizeResol = new PixmapWidget( NULL );
        pSizeResol->setFixedSize( 200, 20 );
        pSizeResol->setPixmap( "/patternEditor/background_res-new.png" );
        pSizeResol->move( 0, 3 );
        editor_top_hbox_2->addWidget( pSizeResol );

        // PATTERN size
        __pattern_size_combo = new LCDCombo(pSizeResol, 4);
        __pattern_size_combo->move( 34, 2 );
        __pattern_size_combo->setToolTip( trUtf8("Select pattern size") );
        for ( int i = 1; i <= 32; i++) {
                __pattern_size_combo->addItem( QString( "%1" ).arg( i ) );
        }
        __pattern_size_combo->update();
        connect(__pattern_size_combo, SIGNAL( valueChanged( QString ) ), this, SLOT( patternSizeChanged(QString) ) );
        //editor_top_hbox->addWidget(__pattern_size_combo);


        // GRID resolution
        __resolution_combo = new LCDCombo( pSizeResol , 7);
        __resolution_combo->setToolTip(trUtf8("Select grid resolution"));
        __resolution_combo->addItem( "4" );
        __resolution_combo->addItem( "8" );
        __resolution_combo->addItem( "16" );
        __resolution_combo->addItem( "32" );
        __resolution_combo->addItem( "64" );
        __resolution_combo->addSeparator();
        __resolution_combo->addItem( "4T" );
        __resolution_combo->addItem( "8T" );
        __resolution_combo->addItem( "16T" );
        __resolution_combo->addItem( "32T" );
        __resolution_combo->addSeparator();
        __resolution_combo->addItem( "off" );
        __resolution_combo->update();
        __resolution_combo->move( 121, 2 );
        connect(__resolution_combo, SIGNAL(valueChanged(QString)), this, SLOT(gridResolutionChanged(QString)));
        //editor_top_hbox->addWidget(__resolution_combo);


//wolke some background images hear note rec quant

        PixmapWidget *pRec = new PixmapWidget( NULL );
        pRec->setFixedSize( 150, 20 );
        pRec->setPixmap( "/patternEditor/background_rec-new.png" );
        pRec->move( 0, 3 );
        editor_top_hbox_2->addWidget( pRec );


        // Hear notes btn
        ToggleButton *hearNotesBtn = new ToggleButton(
                        pRec,
                        "/patternEditor/btn_hear_on.png",
                        "/patternEditor/btn_hear_off.png",
                        "/patternEditor/btn_hear_off.png",
                        QSize(15, 13)
        );
        hearNotesBtn->move( 34, 3 );
        hearNotesBtn->setToolTip( trUtf8( "Hear new notes" ) );
        connect( hearNotesBtn, SIGNAL(clicked(Button*)), this, SLOT( hearNotesBtnClick(Button*)));
        //editor_top_hbox->addWidget(hearNotesBtn);
        // restore hear new notes button state
        hearNotesBtn->setPressed( pPref->getHearNewNotes() );


        // Record events btn
        ToggleButton* recordEventsBtn = new ToggleButton(
                        pRec,
                        "/patternEditor/btn_record_on.png",
                        "/patternEditor/btn_record_off.png",
                        "/patternEditor/btn_record_off.png",
                        QSize(15, 13)
        );
        recordEventsBtn->move( 74, 3 );
        recordEventsBtn->setPressed( pPref->getRecordEvents());
        recordEventsBtn->setToolTip( trUtf8( "Record keyboard/midi events" ) );
        connect( recordEventsBtn, SIGNAL(clicked(Button*)), this, SLOT( recordEventsBtnClick(Button*)));
        //editor_top_hbox->addWidget(recordEventsBtn);


        // quantize
        ToggleButton* quantizeEventsBtn = new ToggleButton(
                        pRec,
                        "/patternEditor/btn_quant_on.png",
                        "/patternEditor/btn_quant_off.png",
                        "/patternEditor/btn_quant_off.png",
                        QSize(15, 13)
        );
        quantizeEventsBtn->move( 130, 3 );
        quantizeEventsBtn->setPressed( pPref->getQuantizeEvents());
        quantizeEventsBtn->setToolTip( trUtf8( "Quantize keyboard/midi events to grid" ) );
        connect( quantizeEventsBtn, SIGNAL(clicked(Button*)), this, SLOT( quantizeEventsBtnClick(Button*)));
        //editor_top_hbox->addWidget(quantizeEventsBtn);


//      PixmapWidget *pZoom = new PixmapWidget( NULL );
//      pZoom->setFixedSize( 73, 20 );
//      pZoom->setPixmap( "/patternEditor/background_zoom-new.png" );
//      pZoom->move( 0, 3 );
//      editor_top_hbox_2->addWidget( pZoom );

        // zoom-in btn
        Button *zoom_in_btn = new Button(
                        NULL,
                        "/songEditor/btn_new_on.png",
                        "/songEditor/btn_new_off.png",
                        "/songEditor/btn_new_over.png",
                        QSize(19, 13)
        );
//      zoom_in_btn->move( 51, 3 );
//      zoom_in_btn->setText("+");
        zoom_in_btn->setToolTip( trUtf8( "Zoom in" ) );
        connect(zoom_in_btn, SIGNAL(clicked(Button*)), this, SLOT( zoomInBtnClicked(Button*) ) );
        //editor_top_hbox_2->addWidget(zoom_in_btn);


        // zoom-out btn
        Button *zoom_out_btn = new Button(
                        NULL,
                        "/songEditor/btn_minus_on.png",
                        "/songEditor/btn_minus_off.png",
                        "/songEditor/btn_minus_over.png",
                        QSize(19, 13)
        );
//      zoom_out_btn->move( 2, 3 );
        //zoom_out_btn->setText("-");
        zoom_out_btn->setToolTip( trUtf8( "Zoom out" ) );
        connect( zoom_out_btn, SIGNAL(clicked(Button*)), this, SLOT( zoomOutBtnClicked(Button*) ) );
        //editor_top_hbox_2->addWidget(zoom_out_btn);


        // show drum editor btn
        __show_drum_btn = new ToggleButton(
                        NULL,
                        "/skin_btn_on.png",
                        "/skin_btn_off.png",
                        "/skin_btn_over.png",
                        QSize(40, 17),
                        true
        );
        __show_drum_btn->setText( trUtf8("Drum") );
        __show_drum_btn->setPressed( true );
        __show_drum_btn->setToolTip( trUtf8( "Show drum editor" ) );
        connect(__show_drum_btn, SIGNAL(clicked(Button*)), this, SLOT( showDrumEditorBtnClick(Button*)));
        editor_top_hbox->addWidget(__show_drum_btn);
        __show_drum_btn->hide();


        // show piano roll btn
        __show_piano_btn = new ToggleButton(
                        NULL,
                        "/skin_btn_on.png",
                        "/skin_btn_off.png",
                        "/skin_btn_over.png",
                        QSize(40, 17),
                        true
        );
        __show_piano_btn->setText( trUtf8("Piano") );
        __show_piano_btn->setPressed( false );
        __show_piano_btn->setToolTip( trUtf8( "Show piano roll editor" ) );
        connect(__show_piano_btn, SIGNAL(clicked(Button*)), this, SLOT( showPianoEditorBtnClick(Button*)));
        editor_top_hbox->addWidget(__show_piano_btn);
        __show_piano_btn->hide();
// End Editor TOP


// RULER____________________________________

        // Ruler ScrollView
        m_pRulerScrollView = new QScrollArea( NULL );
        m_pRulerScrollView->setFrameShape( QFrame::NoFrame );
        m_pRulerScrollView->setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
        m_pRulerScrollView->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
        m_pRulerScrollView->setFixedHeight( 25 );
        // Ruler
        m_pPatternEditorRuler = new PatternEditorRuler( m_pRulerScrollView->viewport() );

        m_pRulerScrollView->setWidget( m_pPatternEditorRuler );

//~ RULER


// EDITOR _____________________________________
        // Editor scrollview
        m_pEditorScrollView = new QScrollArea( NULL );
        m_pEditorScrollView->setFrameShape( QFrame::NoFrame );
        m_pEditorScrollView->setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
        m_pEditorScrollView->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );



        // Editor
        m_pDrumPatternEditor = new DrumPatternEditor( m_pEditorScrollView->viewport(), this );

        m_pEditorScrollView->setWidget( m_pDrumPatternEditor );

        connect( m_pEditorScrollView->verticalScrollBar(), SIGNAL( valueChanged(int) ), this, SLOT( on_patternEditorScroll(int) ) );




        m_pPianoRollScrollView = new QScrollArea( NULL );
        m_pPianoRollScrollView->setFrameShape( QFrame::NoFrame );
        m_pPianoRollScrollView->setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
        m_pPianoRollScrollView->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );

        m_pPianoRollEditor = new PianoRollEditor( m_pPianoRollScrollView->viewport() );
        m_pPianoRollScrollView->setWidget( m_pPianoRollEditor );

        connect( m_pPianoRollScrollView->verticalScrollBar(), SIGNAL( valueChanged(int) ), this, SLOT( on_patternEditorScroll(int) ) );


        m_pPianoRollScrollView->hide();
//~ EDITOR






// INSTRUMENT LIST
        // Instrument list scrollview
        m_pInstrListScrollView = new QScrollArea( NULL );
        m_pInstrListScrollView->setFrameShape( QFrame::NoFrame );
        m_pInstrListScrollView->setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
        m_pInstrListScrollView->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );

        // Instrument list
        m_pInstrumentList = new PatternEditorInstrumentList( m_pInstrListScrollView->viewport(), this );
        m_pInstrListScrollView->setWidget( m_pInstrumentList );
        m_pInstrListScrollView->setFixedWidth( m_pInstrumentList->width() );

        connect( m_pInstrListScrollView->verticalScrollBar(), SIGNAL( valueChanged(int) ), this, SLOT( on_patternEditorScroll(int) ) );
//~ INSTRUMENT LIST




// NOTE_VELOCITY EDITOR
        m_pNoteVelocityScrollView = new QScrollArea( NULL );
        m_pNoteVelocityScrollView->setFrameShape( QFrame::NoFrame );
        m_pNoteVelocityScrollView->setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
        m_pNoteVelocityScrollView->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
        m_pNoteVelocityEditor = new NotePropertiesRuler( m_pNoteVelocityScrollView->viewport(), this, NotePropertiesRuler::VELOCITY );
        m_pNoteVelocityScrollView->setWidget( m_pNoteVelocityEditor );
        m_pNoteVelocityScrollView->setFixedHeight( 100 );
//~ NOTE_VELOCITY EDITOR


// NOTE_PAN EDITOR
        m_pNotePanScrollView = new QScrollArea( NULL );
        m_pNotePanScrollView->setFrameShape( QFrame::NoFrame );
        m_pNotePanScrollView->setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
        m_pNotePanScrollView->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
        m_pNotePanEditor = new NotePropertiesRuler( m_pNotePanScrollView->viewport(), this, NotePropertiesRuler::PAN );
        m_pNotePanScrollView->setWidget( m_pNotePanEditor );
        m_pNotePanScrollView->setFixedHeight( 100 );
//~ NOTE_PAN EDITOR


// NOTE_LEADLAG EDITOR
        m_pNoteLeadLagScrollView = new QScrollArea( NULL );
        m_pNoteLeadLagScrollView->setFrameShape( QFrame::NoFrame );
        m_pNoteLeadLagScrollView->setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
        m_pNoteLeadLagScrollView->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
        m_pNoteLeadLagEditor = new NotePropertiesRuler( m_pNoteLeadLagScrollView->viewport(), this, NotePropertiesRuler::LEADLAG );
        m_pNoteLeadLagScrollView->setWidget( m_pNoteLeadLagEditor );
        m_pNoteLeadLagScrollView->setFixedHeight( 100 );
//~ NOTE_LEADLAG EDITOR

        // external horizontal scrollbar
        m_pPatternEditorHScrollBar = new QScrollBar( Qt::Horizontal , NULL  );
        connect( m_pPatternEditorHScrollBar, SIGNAL(valueChanged(int)), this, SLOT( syncToExternalHorizontalScrollbar(int) ) );

        // external vertical scrollbar
        m_pPatternEditorVScrollBar = new QScrollBar( Qt::Vertical, NULL );
        connect( m_pPatternEditorVScrollBar, SIGNAL(valueChanged(int)), this, SLOT( syncToExternalHorizontalScrollbar(int) ) );

        QHBoxLayout *pPatternEditorHScrollBarLayout = new QHBoxLayout();
        pPatternEditorHScrollBarLayout->setSpacing( 0 );
        pPatternEditorHScrollBarLayout->setMargin( 0 );
        pPatternEditorHScrollBarLayout->addWidget( m_pPatternEditorHScrollBar );
        pPatternEditorHScrollBarLayout->addWidget( zoom_in_btn );
        pPatternEditorHScrollBarLayout->addWidget( zoom_out_btn );

        QWidget *pPatternEditorHScrollBarContainer = new QWidget();
        pPatternEditorHScrollBarContainer->setLayout( pPatternEditorHScrollBarLayout );


        QPalette label_palette;
        label_palette.setColor( QPalette::Foreground, QColor( 230, 230, 230 ) );

        QFont boldFont;
        boldFont.setBold( true );
        m_pPatternNameLbl = new QLabel( NULL );
        m_pPatternNameLbl->setFont( boldFont );
        m_pPatternNameLbl->setText( "pattern name label" );
        //m_pPatternNameLbl->setFixedWidth(200);
        m_pPatternNameLbl->setPalette(label_palette);






// NOTE_PROPERTIES BUTTONS
        PixmapWidget *pPropertiesPanel = new PixmapWidget( NULL );
        pPropertiesPanel->setColor( QColor( 58, 62, 72 ) );

        pPropertiesPanel->setFixedSize( 181, 100 );

        QVBoxLayout *pPropertiesVBox = new QVBoxLayout( pPropertiesPanel );
        pPropertiesVBox->setSpacing( 0 );
        pPropertiesVBox->setMargin( 0 );


        LCDCombo* pPropertiesCombo = new LCDCombo( NULL, 20);
        pPropertiesCombo->setToolTip(trUtf8("Select note properties"));
        pPropertiesCombo->addItem( trUtf8("Velocity") );
        pPropertiesCombo->addItem( trUtf8("Pan") );
        pPropertiesCombo->addItem( trUtf8("Lead and Lag") );
        pPropertiesCombo->update();
        connect( pPropertiesCombo, SIGNAL(valueChanged(QString)), this, SLOT(propertiesComboChanged(QString)));

        pPropertiesVBox->addWidget( pPropertiesCombo );


//~ NOTE_PROPERTIES BUTTONS


// LAYOUT
        QWidget *pMainPanel = new QWidget();

        QGridLayout *pGrid = new QGridLayout();
        pGrid->setSpacing( 0 );
        pGrid->setMargin( 0 );

        pGrid->addWidget( editor_top, 0, 0);
        pGrid->addWidget( editor_top_2, 0, 1, 1, 3);
        pGrid->addWidget( m_pPatternNameLbl, 1, 0 );
        pGrid->addWidget( m_pRulerScrollView, 1, 1 );

        pGrid->addWidget( m_pInstrListScrollView, 2, 0 );

        pGrid->addWidget( m_pEditorScrollView, 2, 1 );
        pGrid->addWidget( m_pPianoRollScrollView, 2, 1 );

        pGrid->addWidget( m_pPatternEditorVScrollBar, 2, 2 );
        pGrid->addWidget( pPatternEditorHScrollBarContainer, 10, 1 );
        pGrid->addWidget( m_pNoteVelocityScrollView, 4, 1 );
        pGrid->addWidget( m_pNotePanScrollView, 4, 1 );
        pGrid->addWidget( m_pNoteLeadLagScrollView, 4, 1 );

        pGrid->addWidget( pPropertiesPanel, 4, 0 );
        pGrid->setRowStretch( 2, 100 );
        pMainPanel->setLayout( pGrid );





        // restore grid resolution
        int nIndex;
        if ( pPref->isPatternEditorUsingTriplets() == false ) {
                switch ( pPref->getPatternEditorGridResolution() ) {
                        case 4:
                                __resolution_combo->set_text( "4" );
                                nIndex = 0;
                                break;

                        case 8:
                                __resolution_combo->set_text( "8" );
                                nIndex = 1;
                                break;

                        case 16:
                                __resolution_combo->set_text( "16" );
                                nIndex = 2;
                                break;

                        case 32:
                                __resolution_combo->set_text( "32" );
                                nIndex = 3;
                                break;

                        case 64:
                                __resolution_combo->set_text( "64" );
                                nIndex = 4;
                                break;

                        default:
                                ERRORLOG( "Wrong grid resolution: " + to_string( pPref->getPatternEditorGridResolution() ) );
                                __resolution_combo->set_text( "4" );
                                nIndex = 0;
                }
        }
        else {
                switch ( pPref->getPatternEditorGridResolution() ) {
                        case 8:
                                __resolution_combo->set_text( "4T" );
                                nIndex = 5;
                                break;

                        case 16:
                                __resolution_combo->set_text( "8T" );
                                nIndex = 6;
                                break;

                        case 32:
                                __resolution_combo->set_text( "16T" );
                                nIndex = 7;
                                break;

                        case 64:
                                __resolution_combo->set_text( "32T" );
                                nIndex = 8;
                                break;

                        default:
                                ERRORLOG( "Wrong grid resolution: " + to_string( pPref->getPatternEditorGridResolution() ) );
                                __resolution_combo->set_text( "4T" );
                                nIndex = 5;
                }
        }
        gridResolutionChanged(__resolution_combo->getText());






        // LAYOUT
        QVBoxLayout *pVBox = new QVBoxLayout();
        pVBox->setSpacing( 0 );
        pVBox->setMargin( 0 );
        this->setLayout( pVBox );

        pVBox->addWidget( pMainPanel );

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

        selectedPatternChangedEvent(); // force an update

        pPropertiesCombo->set_text( trUtf8("Velocity"));
}




PatternEditorPanel::~PatternEditorPanel()
{
}



void PatternEditorPanel::syncToExternalHorizontalScrollbar(int)
{
//      INFOLOG( "[syncToExternalHorizontalScrollbar]" );

        // drum Editor
        m_pEditorScrollView->horizontalScrollBar()->setValue( m_pPatternEditorHScrollBar->value() );
        m_pEditorScrollView->verticalScrollBar()->setValue( m_pPatternEditorVScrollBar->value() );

        // piano roll Editor
        m_pPianoRollScrollView->horizontalScrollBar()->setValue( m_pPatternEditorHScrollBar->value() );
        m_pPianoRollScrollView->verticalScrollBar()->setValue( m_pPatternEditorVScrollBar->value() );


        // Ruler
        m_pRulerScrollView->horizontalScrollBar()->setValue( m_pPatternEditorHScrollBar->value() );

        // Instrument list
        m_pInstrListScrollView->verticalScrollBar()->setValue( m_pPatternEditorVScrollBar->value() );

        // Velocity ruler
        m_pNoteVelocityScrollView->horizontalScrollBar()->setValue( m_pPatternEditorHScrollBar->value() );

        // pan ruler
        m_pNotePanScrollView->horizontalScrollBar()->setValue( m_pPatternEditorHScrollBar->value() );

        // leadlag ruler
        m_pNoteLeadLagScrollView->horizontalScrollBar()->setValue( m_pPatternEditorHScrollBar->value() );
}


void PatternEditorPanel::on_patternEditorScroll(int nValue)
{
//      INFOLOG( "[on_patternEditorScroll]" );
        m_pPatternEditorVScrollBar->setValue( nValue );
}




void PatternEditorPanel::gridResolutionChanged( QString str )
{
        int nResolution;
        bool bUseTriplets = false;

        if ( str.contains( "off" ) ) {
                nResolution=MAX_NOTES;
        }
        else if ( str.contains( "T" ) ) {
                bUseTriplets = true;
                QString temp = str;
                temp.chop( 1 );
                nResolution = temp.toInt() * 2;
        }
        else {
                nResolution = str.toInt();
        }

        //INFOLOG( to_string( nResolution ) );
        m_pDrumPatternEditor->setResolution( nResolution, bUseTriplets );

        Preferences::getInstance()->setPatternEditorGridResolution( nResolution );
        Preferences::getInstance()->setPatternEditorUsingTriplets( bUseTriplets );
}



void PatternEditorPanel::selectedPatternChangedEvent()
{
        PatternList *pPatternList = Hydrogen::get_instance()->getSong()->get_pattern_list();
        int nSelectedPatternNumber = Hydrogen::get_instance()->getSelectedPatternNumber();

        if ( (nSelectedPatternNumber != -1) && ( (uint)nSelectedPatternNumber < pPatternList->get_size() ) ) {
                // update pattern name text
                m_pPattern = pPatternList->get( nSelectedPatternNumber );
                QString sCurrentPatternName = m_pPattern->get_name();
                this->setWindowTitle( ( trUtf8( "Pattern editor - %1").arg( sCurrentPatternName ) ) );
                //m_pNameLCD->setText( sCurrentPatternName );
                m_pPatternNameLbl->setText( sCurrentPatternName );

                // update pattern size combobox
                int nPatternSize = m_pPattern->get_lenght();
                int nEighth = MAX_NOTES / 8;
                for ( int i = 1; i <= 32; i++ ) {
                        if ( nPatternSize == nEighth * i ) {
                                __pattern_size_combo->set_text( QString( "%1" ).arg( i ) );
                                break;
                        }
                }
        }
        else {
                m_pPattern = NULL;

                this->setWindowTitle( ( trUtf8( "Pattern editor - %1").arg(QString("No pattern selected.")) ) );
                //m_pNameLCD->setText( trUtf8( "No pattern selected" ) );
                m_pPatternNameLbl->setText( trUtf8( "No pattern selected" ) );
        }

        resizeEvent( NULL ); // force an update of the scrollbars
}



void PatternEditorPanel::hearNotesBtnClick(Button *ref)
{
        Preferences *pref = ( Preferences::getInstance() );
        pref->setHearNewNotes( ref->isPressed() );

        if (ref->isPressed() ) {
                ( HydrogenApp::getInstance() )->setStatusBarMessage( trUtf8( "Hear new notes = On" ), 2000 );
        }
        else {
                ( HydrogenApp::getInstance() )->setStatusBarMessage( trUtf8( "Hear new notes = Off" ), 2000 );
        }

}



void PatternEditorPanel::recordEventsBtnClick(Button *ref)
{
        Preferences *pref = ( Preferences::getInstance() );
        pref->setRecordEvents( ref->isPressed() );

        if (ref->isPressed() ) {
                ( HydrogenApp::getInstance() )->setStatusBarMessage( trUtf8( "Record keyboard/midi events = On" ), 2000 );
        }
        else {
                ( HydrogenApp::getInstance() )->setStatusBarMessage( trUtf8( "Record keyboard/midi events = Off" ), 2000 );
        }


}


void PatternEditorPanel::quantizeEventsBtnClick(Button *ref)
{
        Preferences *pref = ( Preferences::getInstance() );
        pref->setQuantizeEvents( ref->isPressed() );

        if (ref->isPressed() ) {
                ( HydrogenApp::getInstance() )->setStatusBarMessage( trUtf8( "Quantize incoming keyboard/midi events = On" ), 2000 );
        }
        else {
                ( HydrogenApp::getInstance() )->setStatusBarMessage( trUtf8( "Quantize incoming keyboard/midi events = Off" ), 2000 );
        }
}




void PatternEditorPanel::stateChangedEvent(int state)
{
        if ( state == STATE_READY) {
                m_bEnablePatternResize = true;
        }
        else {
                m_bEnablePatternResize = false;
        }
}



void PatternEditorPanel::resizeEvent( QResizeEvent *ev )
{
        UNUSED( ev );
        QScrollArea *pScrollArea = NULL;

        if ( m_pPianoRollScrollView->isVisible() ) {
                pScrollArea = m_pPianoRollScrollView;
        }
        else {
                pScrollArea = m_pEditorScrollView;
        }


        m_pPatternEditorHScrollBar->setMinimum( pScrollArea->horizontalScrollBar()->minimum() );
        m_pPatternEditorHScrollBar->setMaximum( pScrollArea->horizontalScrollBar()->maximum() );
        m_pPatternEditorHScrollBar->setSingleStep( pScrollArea->horizontalScrollBar()->singleStep() );
        m_pPatternEditorHScrollBar->setPageStep( pScrollArea->horizontalScrollBar()->pageStep() );

        m_pPatternEditorVScrollBar->setMinimum( pScrollArea->verticalScrollBar()->minimum() );
        m_pPatternEditorVScrollBar->setMaximum( pScrollArea->verticalScrollBar()->maximum() );
        m_pPatternEditorVScrollBar->setSingleStep( pScrollArea->verticalScrollBar()->singleStep() );
        m_pPatternEditorVScrollBar->setPageStep( pScrollArea->verticalScrollBar()->pageStep() );
}




void PatternEditorPanel::showEvent ( QShowEvent *ev )
{
        UNUSED( ev );
//      m_pPatternEditorVScrollBar->setValue( m_pPatternEditorVScrollBar->maximum() );
}


/// richiamato dall'uso dello scroll del mouse
void PatternEditorPanel::contentsMoving(int dummy)
{
        UNUSED( dummy );
        //INFOLOG( "contentsMoving" );
        syncToExternalHorizontalScrollbar(0);
}



void PatternEditorPanel::selectedInstrumentChangedEvent()
{
  //m_pNoteVelocityEditor->updateEditor();
  //m_pNotePanEditor->updateEditor();
  //m_pNoteLeadLagEditor->updateEditor();

        resizeEvent(NULL);      // force a scrollbar update
}



void PatternEditorPanel::showDrumEditorBtnClick(Button *ref)
{
        UNUSED( ref );
        __show_drum_btn->setPressed( true );
        __show_piano_btn->setPressed( false );


        m_pPianoRollScrollView->hide();
        m_pEditorScrollView->show();
        m_pInstrListScrollView->show();

        m_pDrumPatternEditor->selectedInstrumentChangedEvent(); // force an update

        // force a re-sync of extern scrollbars
        resizeEvent( NULL );
}



void PatternEditorPanel::showPianoEditorBtnClick(Button *ref)
{
        UNUSED( ref );
        __show_piano_btn->setPressed( true );
        __show_drum_btn->setPressed( false );


        m_pPianoRollScrollView->show();
        m_pEditorScrollView->hide();
        m_pInstrListScrollView->hide();

        m_pPianoRollEditor->selectedInstrumentChangedEvent(); // force an update

        // force a re-sync of extern scrollbars
        resizeEvent( NULL );
}




void PatternEditorPanel::zoomInBtnClicked(Button *ref)
{
        UNUSED( ref );
        m_pPatternEditorRuler->zoomIn();
        m_pDrumPatternEditor->zoom_in();
        m_pNoteVelocityEditor->zoomIn();
        m_pNoteLeadLagEditor->zoomIn();
        m_pNotePanEditor->zoomIn();

        resizeEvent( NULL );
}



void PatternEditorPanel::zoomOutBtnClicked(Button *ref)
{
        UNUSED( ref );
        m_pPatternEditorRuler->zoomOut();
        m_pDrumPatternEditor->zoom_out();
        m_pNoteVelocityEditor->zoomOut();
        m_pNoteLeadLagEditor->zoomOut();
        m_pNotePanEditor->zoomOut();

        resizeEvent( NULL );
}



void PatternEditorPanel::patternSizeChanged( QString str )
{
        INFOLOG( "pattern size changed" );

        uint nEighth = MAX_NOTES / 8;
        int nSelected = str.toInt();

        if ( m_pPattern->get_lenght() == nEighth * nSelected ) {
                // non e' necessario aggiornare
                return;
        }


        if ( !m_pPattern ) {
                return;
        }

        if ( !m_bEnablePatternResize ) {
                QMessageBox::information( this, "Hydrogen", trUtf8( "Is not possible to change the pattern size when playing." ) );
                return;
        }


        if ( nSelected > 0 && nSelected <= 32 ) {
                m_pPattern->set_lenght( nEighth * nSelected );
                //m_pPatternSizeLCD->setText( QString( "%1" ).arg( nSelected ) );
        }
        else {
                ERRORLOG( "[patternSizeChanged] Unhandled case " + to_string( nSelected ) );
        }

        m_pPatternEditorRuler->updateEditor( true );    // redraw all
        m_pNoteVelocityEditor->updateEditor();
        m_pNotePanEditor->updateEditor();
        m_pNoteLeadLagEditor->updateEditor();

        resizeEvent( NULL );

        EventQueue::get_instance()->push_event( EVENT_SELECTED_PATTERN_CHANGED, -1 );
}



void PatternEditorPanel::moveUpBtnClicked(Button *)
{
        Hydrogen *engine = Hydrogen::get_instance();
        int nSelectedInstrument = engine->getSelectedInstrumentNumber();

        AudioEngine::get_instance()->lock( "PatternEditorPanel::moveUpBtnClicked" );

        Song *pSong = engine->getSong();
        InstrumentList *pInstrumentList = pSong->get_instrument_list();

        if ( ( nSelectedInstrument - 1 ) >= 0 ) {
                Instrument *pTemp = pInstrumentList->get( nSelectedInstrument - 1 );
                pInstrumentList->replace( pInstrumentList->get( nSelectedInstrument ), nSelectedInstrument - 1 );
                pInstrumentList->replace( pTemp, nSelectedInstrument );

/*
                // devo spostare tutte le note...
                PatternList *pPatternList = pSong->getPatternList();
                for ( int nPattern = 0; nPattern < pPatternList->getSize(); nPattern++ ) {
                        Pattern *pPattern = pPatternList->get( nPattern );
                        Sequence *pSeq1 = pPattern->m_pSequenceList->get( nSelectedInstrument );
                        Sequence *pSeq2 = pPattern->m_pSequenceList->get( nSelectedInstrument - 1 );

                        // swap notelist..
                        map <int, Note*> noteList = pSeq1->m_noteList;
                        pSeq1->m_noteList = pSeq2->m_noteList;
                        pSeq2->m_noteList = noteList;
                }
*/
                AudioEngine::get_instance()->unlock();
                engine->setSelectedInstrumentNumber( nSelectedInstrument - 1 );

                pSong->__is_modified = true;
        }
        else {
                AudioEngine::get_instance()->unlock();
        }
}



void PatternEditorPanel::moveDownBtnClicked(Button *)
{
        Hydrogen *engine = Hydrogen::get_instance();
        int nSelectedInstrument = engine->getSelectedInstrumentNumber();

        AudioEngine::get_instance()->lock( "PatternEditorPanel::moveDownBtnClicked" );

        Song *pSong = engine->getSong();
        InstrumentList *pInstrumentList = pSong->get_instrument_list();

        if ( ( nSelectedInstrument + 1 ) < (int)pInstrumentList->get_size() ) {
                Instrument *pTemp = pInstrumentList->get( nSelectedInstrument + 1 );
                pInstrumentList->replace( pInstrumentList->get( nSelectedInstrument ), nSelectedInstrument + 1 );
                pInstrumentList->replace( pTemp, nSelectedInstrument );

/*
                // devo spostare tutte le note...
                PatternList *pPatternList = pSong->getPatternList();
                for ( int nPattern = 0; nPattern < pPatternList->getSize(); nPattern++ ) {
                        Pattern *pPattern = pPatternList->get( nPattern );
                        Sequence *pSeq1 = pPattern->m_pSequenceList->get( nSelectedInstrument );
                        Sequence *pSeq2 = pPattern->m_pSequenceList->get( nSelectedInstrument + 1 );

                        // swap notelist..
                        map <int, Note*> noteList = pSeq1->m_noteList;
                        pSeq1->m_noteList = pSeq2->m_noteList;
                        pSeq2->m_noteList = noteList;
                }
*/
                AudioEngine::get_instance()->unlock();
                engine->setSelectedInstrumentNumber( nSelectedInstrument + 1 );

                pSong->__is_modified = true;
        }
        else {
                AudioEngine::get_instance()->unlock();
        }

}




void PatternEditorPanel::dragEnterEvent(QDragEnterEvent *event)
{
        m_pInstrumentList->dragEnterEvent( event );
}



void PatternEditorPanel::dropEvent(QDropEvent *event)
{
        m_pInstrumentList->dropEvent( event );
}



void PatternEditorPanel::propertiesComboChanged( QString text )
{
        if ( text == trUtf8( "Velocity" ) ) {
                m_pNotePanScrollView->hide();
                m_pNoteLeadLagScrollView->hide();
                m_pNoteVelocityScrollView->show();

                m_pNoteVelocityEditor->updateEditor();
        }
        else if ( text == trUtf8( "Pan" ) ) {
                m_pNoteVelocityScrollView->hide();
                m_pNoteLeadLagScrollView->hide();
                m_pNotePanScrollView->show();

                m_pNotePanEditor->updateEditor();
        }
        else if ( text == trUtf8( "Lead and Lag" ) ) {
                m_pNoteVelocityScrollView->hide();
                m_pNotePanScrollView->hide();
                m_pNoteLeadLagScrollView->show();
 
                m_pNoteLeadLagEditor->updateEditor();
        }
        else if ( text == trUtf8( "Cutoff" ) ) {
        }
        else if ( text == trUtf8( "Resonance" ) ) {
        }
        else {
                ERRORLOG( "Unknown text: " + text );
        }
}