PatternEditorInstrumentList.cpp

Go to the documentation of this file.

/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 * Copyright(c) 2008-2024 The hydrogen development team [hydrogen-devel@lists.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, see https://www.gnu.org/licenses
 *
 */
 
#include "PatternEditorInstrumentList.h"
 
#include <core/AudioEngine/AudioEngine.h>
#include <core/EventQueue.h>
#include <core/Hydrogen.h>
#include <core/Basics/Instrument.h>
#include <core/Basics/InstrumentList.h>
#include <core/Basics/Note.h>
#include <core/Basics/Pattern.h>
#include <core/Basics/PatternList.h>
#include <core/Basics/Song.h>
using namespace H2Core;
 
#include "CommonStrings.h"
#include "UndoActions.h"
#include "PatternEditorPanel.h"
#include "InstrumentEditor/InstrumentEditorPanel.h"
#include "DrumPatternEditor.h"
#include "../HydrogenApp.h"
#include "../MainForm.h"
#include "../Widgets/Button.h"
#include "../Skin.h"
 
#include <QtGui>
#include <QtWidgets>
#include <QClipboard>
 
#include <cassert>
#include <algorithm> // for std::min
 
 
InstrumentLine::InstrumentLine(QWidget* pParent)
        : PixmapWidget(pParent)
        , WidgetWithHighlightedList()
        , m_bIsSelected( false )
        , m_bEntered( false )
{
 
        auto pPref = H2Core::Preferences::get_instance();
        auto pCommonStrings = HydrogenApp::get_instance()->getCommonStrings();
        
        int h = pPref->getPatternEditorGridHeight();
        setFixedSize(181, h);
 
        QFont nameFont( pPref->getLevel2FontFamily(), getPointSize( pPref->getFontSize() ) );
 
        m_pNameLbl = new QLabel(this);
        m_pNameLbl->resize( 145, h );
        m_pNameLbl->move( 10, 1 );
        m_pNameLbl->setFont(nameFont);
 
        /*: Text displayed on the button for muting an instrument. Its
          size is designed for a single character.*/
        m_pMuteBtn = new Button( this, QSize( InstrumentLine::m_nButtonWidth, height() - 1 ),
                                                         Button::Type::Toggle, "",
                                                         pCommonStrings->getSmallMuteButton(),
                                                         true, QSize(), tr("Mute instrument"),
                                                         false, true );
        m_pMuteBtn->move( 145, 0 );
        m_pMuteBtn->setChecked(false);
        m_pMuteBtn->setObjectName( "InstrumentLineMuteButton" );
        connect(m_pMuteBtn, SIGNAL( clicked() ), this, SLOT( muteClicked() ));
 
        /*: Text displayed on the button for soloing an instrument. Its
          size is designed for a single character.*/
        m_pSoloBtn = new Button( this, QSize( InstrumentLine::m_nButtonWidth, height() - 1 ),
                                                         Button::Type::Toggle, "",
                                                         pCommonStrings->getSmallSoloButton(),
                                                         false, QSize(), tr("Solo"),
                                                         false, true );
        m_pSoloBtn->move( 163, 0 );
        m_pSoloBtn->setChecked(false);
        m_pSoloBtn->setObjectName( "InstrumentLineSoloButton" );
        connect(m_pSoloBtn, SIGNAL( clicked() ), this, SLOT(soloClicked()));
 
        m_pSampleWarning = new Button( this, QSize( 15, 13 ), Button::Type::Icon,
                                                                   "warning.svg", "", false, QSize(),
                                                                   tr( "Some samples for this instrument failed to load." ),
                                                                   true );
        m_pSampleWarning->move( 128, 5 );
        m_pSampleWarning->hide();
        connect(m_pSampleWarning, SIGNAL( clicked() ), this, SLOT( sampleWarningClicked() ));
 
 
        // Popup menu
        m_pFunctionPopup = new QMenu( this );
        m_pFunctionPopup->addAction( tr( "Delete notes" ), this, SLOT( functionClearNotes() ) );
 
        m_pFunctionPopupSub = new QMenu( tr( "Fill notes ..." ), m_pFunctionPopup );
        m_pFunctionPopupSub->addAction( tr( "Fill all notes" ), this, SLOT( functionFillAllNotes() ) );
        m_pFunctionPopupSub->addAction( tr( "Fill 1/2 notes" ), this, SLOT( functionFillEveryTwoNotes() ) );
        m_pFunctionPopupSub->addAction( tr( "Fill 1/3 notes" ), this, SLOT( functionFillEveryThreeNotes() ) );
        m_pFunctionPopupSub->addAction( tr( "Fill 1/4 notes" ), this, SLOT( functionFillEveryFourNotes() ) );
        m_pFunctionPopupSub->addAction( tr( "Fill 1/6 notes" ), this, SLOT( functionFillEverySixNotes() ) );
        m_pFunctionPopupSub->addAction( tr( "Fill 1/8 notes" ), this, SLOT( functionFillEveryEightNotes() ) );
        m_pFunctionPopupSub->addAction( tr( "Fill 1/12 notes" ), this, SLOT( functionFillEveryTwelveNotes() ) );
        m_pFunctionPopupSub->addAction( tr( "Fill 1/16 notes" ), this, SLOT( functionFillEverySixteenNotes() ) );
        m_pFunctionPopup->addMenu( m_pFunctionPopupSub );
 
        m_pFunctionPopup->addAction( tr( "Randomize velocity" ), this, SLOT( functionRandomizeVelocity() ) );
        auto selectNotesAction = m_pFunctionPopup->addAction( tr( "Select notes" ) );
        connect( selectNotesAction, &QAction::triggered, this,
                         &InstrumentLine::selectInstrumentNotes );
 
        m_pFunctionPopup->addSection( tr( "Edit all patterns" ) );
        m_pFunctionPopup->addAction( tr( "Cut notes"), this, SLOT( functionCutNotesAllPatterns() ) );
        m_pFunctionPopup->addAction( tr( "Copy notes"), this, SLOT( functionCopyAllInstrumentPatterns() ) );
        m_pFunctionPopup->addAction( tr( "Paste notes" ), this, SLOT( functionPasteAllInstrumentPatterns() ) );
        m_pFunctionPopup->addAction( tr( "Delete notes" ), this, SLOT( functionDeleteNotesAllPatterns() ) );
 
        m_pFunctionPopup->addSection( tr( "Instrument" ) );
        m_pFunctionPopup->addAction( tr( "Rename instrument" ), this, SLOT( functionRenameInstrument() ) );
        auto deleteAction = m_pFunctionPopup->addAction( tr( "Delete instrument" ) );
        connect( deleteAction, &QAction::triggered, this, [=](){
                HydrogenApp::get_instance()->getMainForm()->
                        functionDeleteInstrument( m_nInstrumentNumber );} );
        m_pFunctionPopup->setObjectName( "PatternEditorFunctionPopup" );
 
                // Reset the clicked row once the popup is closed by clicking at
        // any position other than at an action of the popup.
        connect( m_pFunctionPopup, &QMenu::aboutToHide, [=](){
                if ( m_rowSelection == RowSelection::Popup ) {
                        setRowSelection( RowSelection::None );
                }
        });
 
        updateStyleSheet();
}
 
 
void InstrumentLine::setRowSelection( RowSelection rowSelection ) {
        if ( m_rowSelection != rowSelection ) {
                m_rowSelection = rowSelection;
                update();
        }
}
 
 
void InstrumentLine::setName(const QString& sName)
{
        if ( m_pNameLbl->text() != sName ){
                m_pNameLbl->setText(sName);
        }
}
 
 
 
void InstrumentLine::setSelected( bool bSelected )
{
        if ( bSelected == m_bIsSelected ) {
                return;
        }
        
        m_bIsSelected = bSelected;
 
        updateStyleSheet();
        update();
}
 
void InstrumentLine::updateStyleSheet() {
 
        auto pPref = H2Core::Preferences::get_instance();
 
        QColor textColor;
        if ( m_bIsSelected ) {
                textColor = pPref->getColorTheme()->m_patternEditor_selectedRowTextColor;
        } else {
                textColor = pPref->getColorTheme()->m_patternEditor_textColor;
        }
 
        m_pNameLbl->setStyleSheet( QString( "\
QLabel {\
   color: %1;\
   font-weight: bold;\
 }" ).arg( textColor.name() ) );
}
 
void InstrumentLine::enterEvent( QEvent* ev ) {
        UNUSED( ev );
        m_bEntered = true;
        update();
}
 
void InstrumentLine::leaveEvent( QEvent* ev ) {
        UNUSED( ev );
        m_bEntered = false;
        update();
}
 
void InstrumentLine::paintEvent( QPaintEvent* ev ) {
        auto pPref = Preferences::get_instance();
        auto pHydrogenApp = HydrogenApp::get_instance();
        
        QPainter painter(this);
 
        QColor backgroundColor;
        if ( m_bIsSelected ) {
                backgroundColor = pPref->getColorTheme()->m_patternEditor_selectedRowColor.darker( 114 );
        } else {
                if ( m_nInstrumentNumber == 0 ||
                         m_nInstrumentNumber % 2 == 0 ) {
                        backgroundColor = pPref->getColorTheme()->m_patternEditor_backgroundColor.darker( 120 );
                } else {
                        backgroundColor = pPref->getColorTheme()->m_patternEditor_alternateRowColor.darker( 132 );
                }
        }
 
        // Make the background slightly lighter when hovered.
        bool bHovered = false;
        if ( m_bEntered && m_rowSelection == RowSelection::None ) {
                bHovered = true;
        }
 
        Skin::drawListBackground( &painter, QRect( 0, 0, width(), height() ),
                                                          backgroundColor, bHovered );
 
        // Draw border indicating cursor position
        if ( ( m_bIsSelected && pHydrogenApp->getPatternEditorPanel() != nullptr &&
                   pHydrogenApp->getPatternEditorPanel()->getDrumPatternEditor()->hasFocus() &&
                   ! pHydrogenApp->hideKeyboardCursor() ) ||
                 m_rowSelection != RowSelection::None ) {
 
                QPen pen;
 
                if ( m_rowSelection != RowSelection::None ) {
                        // In case a row was right-clicked, highlight it using a border.
                        pen.setColor( pPref->getColorTheme()->m_highlightColor);
                } else {
                        pen.setColor( pPref->getColorTheme()->m_cursorColor );
                }
                
                pen.setWidth( 2 );
                painter.setPen( pen );
                painter.setRenderHint( QPainter::Antialiasing );
                painter.drawRoundedRect( QRect( 1, 1, width() - 2 * InstrumentLine::m_nButtonWidth - 1,
                                                                                height() - 2 ), 4, 4 );
        }
}
 
 
void InstrumentLine::setNumber(int nIndex)
{
        if ( m_nInstrumentNumber != nIndex ) {
                m_nInstrumentNumber = nIndex;
                update();
        }
}
 
 
 
void InstrumentLine::setMuted(bool isMuted)
{
        if ( ! m_pMuteBtn->isDown() &&
                 m_pMuteBtn->isChecked() != isMuted ) {
                m_pMuteBtn->setChecked(isMuted);
        }
}
 
 
void InstrumentLine::setSoloed( bool soloed )
{
        if ( ! m_pSoloBtn->isDown() &&
                 m_pSoloBtn->isChecked() != soloed ) {
                m_pSoloBtn->setChecked( soloed );
        }
}
 
 
void InstrumentLine::setSamplesMissing( bool bSamplesMissing )
{
        if ( bSamplesMissing ) {
                m_pSampleWarning->show();
        } else {
                m_pSampleWarning->hide();
        }
}
 
 
 
void InstrumentLine::muteClicked()
{
        Hydrogen *pHydrogen = Hydrogen::get_instance();
        std::shared_ptr<Song> pSong = pHydrogen->getSong();
        if ( pSong == nullptr ) {
                ERRORLOG( "No song set yet" );
                return;
        }
        
        auto pInstrList = pSong->getInstrumentList();
        auto pInstr = pInstrList->get( m_nInstrumentNumber );
        if ( pInstr == nullptr ) {
                ERRORLOG( QString( "Unable to retrieve instrument [%1]" )
                                  .arg( m_nInstrumentNumber ) );
                return;
        }
        
        pHydrogen->setSelectedInstrumentNumber( m_nInstrumentNumber );
 
        CoreActionController* pCoreActionController = pHydrogen->getCoreActionController();
        pCoreActionController->setStripIsMuted( m_nInstrumentNumber, !pInstr->is_muted() );
}
 
 
 
void InstrumentLine::soloClicked()
{
        Hydrogen *pHydrogen = Hydrogen::get_instance();
        std::shared_ptr<Song> pSong = pHydrogen->getSong();
        if ( pSong == nullptr ) {
                ERRORLOG( "No song set yet" );
                return;
        }
        
        auto pInstrList = pSong->getInstrumentList();
        auto pInstr = pInstrList->get( m_nInstrumentNumber );
        if ( pInstr == nullptr ) {
                ERRORLOG( QString( "Unable to retrieve instrument [%1]" )
                                  .arg( m_nInstrumentNumber ) );
                return;
        }
        
        pHydrogen->setSelectedInstrumentNumber( m_nInstrumentNumber );
 
        CoreActionController* pCoreActionController = pHydrogen->getCoreActionController();
        pCoreActionController->setStripIsSoloed( m_nInstrumentNumber, !pInstr->is_soloed() );
}
 
void InstrumentLine::sampleWarningClicked()
{
        QMessageBox::information( this, "Hydrogen",
                                                          tr( "One or more samples for this instrument failed to load. This may be because the"
                                                                  " songfile uses an older default drumkit. This might be fixed by opening a new "
                                                                  "drumkit." ) );
}
 
void InstrumentLine::selectInstrumentNotes()
{
        HydrogenApp::get_instance()->getPatternEditorPanel()->selectInstrumentNotes( m_nInstrumentNumber );
}
 
void InstrumentLine::mousePressEvent(QMouseEvent *ev)
{
        Hydrogen::get_instance()->setSelectedInstrumentNumber( m_nInstrumentNumber );
        HydrogenApp::get_instance()->getPatternEditorPanel()->getDrumPatternEditor()->updateEditor();
 
        if ( ev->button() == Qt::LeftButton ) {
 
                std::shared_ptr<Song> pSong = Hydrogen::get_instance()->getSong();
                if ( pSong == nullptr ) {
                        ERRORLOG( "No song set yet" );
                        return;
                }
                auto pInstr = pSong->getInstrumentList()->get( m_nInstrumentNumber );
                if ( pInstr != nullptr && pInstr->hasSamples() ) {
 
                        const int nWidth = m_pMuteBtn->x() - 5; // clickable field width
                        const float fVelocity = std::min((float)ev->x()/(float)nWidth, 1.0f);
                        Note *pNote = new Note( pInstr, 0, fVelocity);
                        Hydrogen::get_instance()->getAudioEngine()->getSampler()->noteOn(pNote);
                }
                
        } else if (ev->button() == Qt::RightButton ) {
 
                if ( m_rowSelection == RowSelection::Dialog ) {
                        // There is still a dialog window opened from the last
                        // time. It needs to be closed before the popup will
                        // be shown again.
                        ERRORLOG( "A dialog is still opened. It needs to be closed first." );
                        return;
                }
                        
                setRowSelection( RowSelection::Popup );
                        
                m_pFunctionPopup->popup( QPoint( ev->globalX(), ev->globalY() ) );
        }
 
        // propago l'evento al parent: serve per il drag&drop
        PixmapWidget::mousePressEvent(ev);
}
 
void InstrumentLine::mouseDoubleClickEvent( QMouseEvent* ev ) {
        functionRenameInstrument();
}
 
H2Core::Pattern* InstrumentLine::getCurrentPattern()
{
        Hydrogen *pHydrogen = Hydrogen::get_instance();
        PatternList *pPatternList = pHydrogen->getSong()->getPatternList();
        assert( pPatternList != nullptr );
 
        int nSelectedPatternNumber = pHydrogen->getSelectedPatternNumber();
        if ( nSelectedPatternNumber != -1 &&
                 nSelectedPatternNumber < pPatternList->size() ) {
                Pattern* pCurrentPattern = pPatternList->get( nSelectedPatternNumber );
                return pCurrentPattern;
        }
        return nullptr;
}
 
 
 
 
void InstrumentLine::functionClearNotes()
{
        Hydrogen * pHydrogen = Hydrogen::get_instance();
        int selectedPatternNr = pHydrogen->getSelectedPatternNumber();
        Pattern *pPattern = getCurrentPattern();
        auto pSelectedInstrument = pHydrogen->getSong()->getInstrumentList()->get( m_nInstrumentNumber );
        if ( pSelectedInstrument == nullptr ) {
                ERRORLOG( "No instrument selected" );
                return;
        }
 
        if ( selectedPatternNr == -1 ) {
                // No pattern selected. Nothing to be clear.
                return;
        }
 
        std::list< Note* > noteList;
        const Pattern::notes_t* notes = pPattern->get_notes();
        FOREACH_NOTE_CST_IT_BEGIN_END(notes,it) {
                Note *pNote = it->second;
                assert( pNote );
                if ( pNote->get_instrument() == pSelectedInstrument ) {
                        noteList.push_back( pNote );
                }
        }
        if( noteList.size() > 0 ){
                SE_clearNotesPatternEditorAction *action = new SE_clearNotesPatternEditorAction( noteList, m_nInstrumentNumber,selectedPatternNr);
                HydrogenApp::get_instance()->m_pUndoStack->push( action );
        }
}
 
 
void InstrumentLine::functionCopyAllInstrumentPatterns()
{
        Hydrogen* pHydrogen = Hydrogen::get_instance();
        std::shared_ptr<Song> pSong = pHydrogen->getSong();
        if ( pSong == nullptr ) {
                assert( pSong );
                ERRORLOG( "No song present" );
                return;
        }
 
        // Serialize & put to clipboard
        QString sSerialized = pSong->copyInstrumentLineToString( m_nInstrumentNumber );
        if ( sSerialized.isEmpty() ) {
                ERRORLOG( QString( "Unable to serialize instrument line [%1]" )
                                  .arg( m_nInstrumentNumber ) );
                return;
        }
        
        QClipboard *clipboard = QApplication::clipboard();
        clipboard->setText( sSerialized );
}
 
 
void InstrumentLine::functionPasteAllInstrumentPatterns()
{
        Hydrogen* pHydrogen = Hydrogen::get_instance();
        std::shared_ptr<Song> pSong = pHydrogen->getSong();
        if ( pSong == nullptr ) {
                assert( pSong );
                ERRORLOG( "No song present" );
                return;
        }
 
        // This is a note list for pasted notes collection
        std::list<Pattern*> patternList;
 
        // Get from clipboard & deserialize
        QClipboard *clipboard = QApplication::clipboard();
        QString sSerialized = clipboard->text();
        if ( ! pSong->pasteInstrumentLineFromString( sSerialized,
                                                                                                 m_nInstrumentNumber,
                                                                                                 patternList ) ) {
                return;
        }
 
        // Ignore empty result
        if (patternList.size() <= 0) {
                return;
        }
 
        // Create action
        SE_pasteNotesPatternEditorAction *action = new SE_pasteNotesPatternEditorAction(patternList);
        HydrogenApp::get_instance()->m_pUndoStack->push(action);
}
 
void InstrumentLine::functionDeleteNotesAllPatterns()
{
        std::shared_ptr<Song> pSong = Hydrogen::get_instance()->getSong();
        PatternList *pPatternList = pSong->getPatternList();
        auto pSelectedInstrument = pSong->getInstrumentList()->get( m_nInstrumentNumber );
        if ( pSelectedInstrument == nullptr ) {
                ERRORLOG( "No instrument selected" );
                return;
        }
        QUndoStack *pUndo = HydrogenApp::get_instance()->m_pUndoStack;
 
        pUndo->beginMacro( tr( "Delete all notes on %1" ).arg( pSelectedInstrument->get_name()  ) );
        for ( int nPattern = 0; nPattern < pPatternList->size(); nPattern++ ) {
                std::list< Note* > noteList;
                Pattern *pPattern = pPatternList->get( nPattern );
                const Pattern::notes_t* notes = pPattern->get_notes();
                FOREACH_NOTE_CST_IT_BEGIN_END( notes, it) {
                        if ( it->second->get_instrument() == pSelectedInstrument ) {
                                noteList.push_back( it->second );
                        }
                }
                if ( noteList.size() > 0 ) {
                        pUndo->push( new SE_clearNotesPatternEditorAction( noteList, m_nInstrumentNumber, nPattern ) );
                }
        }
        pUndo->endMacro();
}
 
void InstrumentLine::functionCutNotesAllPatterns()
{
        functionCopyAllInstrumentPatterns();
        functionDeleteNotesAllPatterns();
}
 
 
void InstrumentLine::functionFillAllNotes(){ functionFillNotes(1); }
void InstrumentLine::functionFillEveryTwoNotes(){ functionFillNotes(2); }
void InstrumentLine::functionFillEveryThreeNotes(){ functionFillNotes(3); }
void InstrumentLine::functionFillEveryFourNotes(){ functionFillNotes(4); }
void InstrumentLine::functionFillEverySixNotes(){ functionFillNotes(6); }
void InstrumentLine::functionFillEveryEightNotes(){ functionFillNotes(8); }
void InstrumentLine::functionFillEveryTwelveNotes(){ functionFillNotes(12); }
void InstrumentLine::functionFillEverySixteenNotes(){ functionFillNotes(16); }
 
void InstrumentLine::functionFillNotes( int every )
{
        Hydrogen *pHydrogen = Hydrogen::get_instance();
        if ( pHydrogen->getSelectedPatternNumber() == -1 ) {
                // No pattern selected. Nothing to be filled.
                return;
        }
 
        PatternEditorPanel *pPatternEditorPanel = HydrogenApp::get_instance()->getPatternEditorPanel();
        DrumPatternEditor *pPatternEditor = pPatternEditorPanel->getDrumPatternEditor();
        int nBase;
        if ( pPatternEditor->isUsingTriplets() ) {
                nBase = 3;
        }
        else {
                nBase = 4;
        }
        int nResolution = 4 * MAX_NOTES * every / ( nBase * pPatternEditor->getResolution() );
 
 
        std::shared_ptr<Song> pSong = pHydrogen->getSong();
 
        QStringList notePositions;
 
        Pattern* pCurrentPattern = getCurrentPattern();
        if (pCurrentPattern != nullptr) {
                int nPatternSize = pCurrentPattern->get_length();
                auto pSelectedInstrument = pHydrogen->getSelectedInstrument();
                if ( pSelectedInstrument == nullptr ) {
                        ERRORLOG( "No instrument selected" );
                        return;
                }
                int nSelectedInstrument = pHydrogen->getSelectedInstrumentNumber();
 
                for (int i = 0; i < nPatternSize; i += nResolution) {
                        bool noteAlreadyPresent = false;
                        const Pattern::notes_t* notes = pCurrentPattern->get_notes();
                        FOREACH_NOTE_CST_IT_BOUND_LENGTH(notes,it,i,pCurrentPattern) {
                                Note *pNote = it->second;
                                if ( pNote->get_instrument() == pSelectedInstrument ) {
                                        // note already exists
                                        noteAlreadyPresent = true;
                                        break;
                                }
                        }
 
                        if ( noteAlreadyPresent == false ) {
                                notePositions << QString("%1").arg(i);
                        }
                }
                SE_fillNotesRightClickAction *action = new SE_fillNotesRightClickAction( notePositions, nSelectedInstrument, pHydrogen->getSelectedPatternNumber() );
                HydrogenApp::get_instance()->m_pUndoStack->push( action );
        }
 
}
 
 
 
void InstrumentLine::functionRandomizeVelocity()
{
        Hydrogen *pHydrogen = Hydrogen::get_instance();
 
        if ( pHydrogen->getSelectedPatternNumber() == -1 ) {
                // No pattern selected. Nothing to be randomized.
                return;
        }
 
        PatternEditorPanel *pPatternEditorPanel = HydrogenApp::get_instance()->getPatternEditorPanel();
        DrumPatternEditor *pPatternEditor = pPatternEditorPanel->getDrumPatternEditor();
 
 
        int nBase;
        if ( pPatternEditor->isUsingTriplets() ) {
                nBase = 3;
        }
        else {
                nBase = 4;
        }
        int nResolution = 4 * MAX_NOTES / ( nBase * pPatternEditor->getResolution() );
 
        std::shared_ptr<Song> pSong = pHydrogen->getSong();
 
        QStringList noteVeloValue;
        QStringList oldNoteVeloValue;
 
        Pattern* pCurrentPattern = getCurrentPattern();
        if (pCurrentPattern != nullptr) {
                int nPatternSize = pCurrentPattern->get_length();
                auto pSelectedInstrument = pHydrogen->getSelectedInstrument();
                if ( pSelectedInstrument == nullptr ) {
                        ERRORLOG( "No instrument selected" );
                        return;
                }
                int nSelectedInstrument = pHydrogen->getSelectedInstrumentNumber();
 
                for (int i = 0; i < nPatternSize; i += nResolution) {
                        const Pattern::notes_t* notes = pCurrentPattern->get_notes();
                        FOREACH_NOTE_CST_IT_BOUND_LENGTH(notes,it,i,pCurrentPattern) {
                                Note *pNote = it->second;
                                if ( pNote->get_instrument() == pSelectedInstrument ) {
                                        float fVal = ( rand() % 100 ) / 100.0;
                                        oldNoteVeloValue <<  QString("%1").arg( pNote->get_velocity() );
                                        fVal = pNote->get_velocity() + ( ( fVal - 0.50 ) / 2 );
                                        if ( fVal < 0  ) {
                                                fVal = 0;
                                        }
                                        if ( fVal > 1 ) {
                                                fVal = 1;
                                        }
                                        noteVeloValue << QString("%1").arg(fVal);
                                }
                        }
                }
                SE_randomVelocityRightClickAction *action = new SE_randomVelocityRightClickAction( noteVeloValue, oldNoteVeloValue, nSelectedInstrument, pHydrogen->getSelectedPatternNumber() );
                HydrogenApp::get_instance()->m_pUndoStack->push( action );
        }
}
 
 
 
void InstrumentLine::functionRenameInstrument()
{
        setRowSelection( RowSelection::Dialog );
        // This code is pretty much a duplicate of void InstrumentEditor::labelClicked
        // in InstrumentEditor.cpp
        Hydrogen * pHydrogen = Hydrogen::get_instance();
        auto pSelectedInstrument = pHydrogen->getSong()->getInstrumentList()->get( m_nInstrumentNumber );
        if ( pSelectedInstrument == nullptr ) {
                ERRORLOG( "No instrument selected" );
                return;
        }
 
        QString sOldName = pSelectedInstrument->get_name();
        bool bIsOkPressed;
        QString sNewName = QInputDialog::getText( this, "Hydrogen", tr( "New instrument name" ), QLineEdit::Normal, sOldName, &bIsOkPressed );
        if ( bIsOkPressed  ) {
                pSelectedInstrument->set_name( sNewName );
 
                if ( pHydrogen->hasJackAudioDriver() ) {
                        pHydrogen->getAudioEngine()->lock( RIGHT_HERE );
                        pHydrogen->renameJackPorts( pHydrogen->getSong() );
                        pHydrogen->getAudioEngine()->unlock();
                }
 
                // this will force an update...
                EventQueue::get_instance()->push_event( EVENT_SELECTED_INSTRUMENT_CHANGED, -1 );
 
        }
        else
        {
                // user entered nothing or pressed Cancel
        }
        
        setRowSelection( RowSelection::None );
}
 
void InstrumentLine::onPreferencesChanged( H2Core::Preferences::Changes changes ) {
        auto pPref = H2Core::Preferences::get_instance();
 
        if ( changes & H2Core::Preferences::Changes::Font ) {
                
                m_pNameLbl->setFont( QFont( pPref->getLevel2FontFamily(), getPointSize( pPref->getFontSize() ) ) );
        }
 
        if ( changes & H2Core::Preferences::Changes::Colors ) {
                updateStyleSheet();
                update();
        }
}
 
 
 
PatternEditorInstrumentList::PatternEditorInstrumentList( QWidget *parent, PatternEditorPanel *pPatternEditorPanel )
 : QWidget( parent )
 {
 
        HydrogenApp::get_instance()->addEventListener( this );
        
        //INFOLOG("INIT");
        m_pPattern = nullptr;
        m_pPatternEditorPanel = pPatternEditorPanel;
 
        m_nGridHeight = Preferences::get_instance()->getPatternEditorGridHeight();
 
        m_nEditorWidth = 181;
        m_nEditorHeight = m_nGridHeight * MAX_INSTRUMENTS + 1;
 
        resize( m_nEditorWidth, m_nEditorHeight );
 
        setAcceptDrops(true);
 
        for ( int i = 0; i < MAX_INSTRUMENTS; ++i) {
                m_pInstrumentLine[i] = nullptr;
        }
 
 
        updateInstrumentLines();
 
        m_pUpdateTimer = new QTimer( this );
        connect( m_pUpdateTimer, SIGNAL( timeout() ), this, SLOT( updateInstrumentLines() ) );
        m_pUpdateTimer->start(50);
 
        QScrollArea *pScrollArea = dynamic_cast< QScrollArea *>( parentWidget()->parentWidget() );
        assert( pScrollArea );
        m_pDragScroller = new DragScroller( pScrollArea );
}
 
 
 
PatternEditorInstrumentList::~PatternEditorInstrumentList()
{
        //INFOLOG( "DESTROY" );
        m_pUpdateTimer->stop();
        delete m_pDragScroller;
}
 
 
 
 
InstrumentLine* PatternEditorInstrumentList::createInstrumentLine()
{
        InstrumentLine *pLine = new InstrumentLine(this);
        connect( HydrogenApp::get_instance(), &HydrogenApp::preferencesChanged,
                         pLine, &InstrumentLine::onPreferencesChanged );
        return pLine;
}
 
void PatternEditorInstrumentList::updateSongEvent( int nEvent ) {
        if ( nEvent == 0 || nEvent == 1 ) {
                updateInstrumentLines();
        }
}
 
void PatternEditorInstrumentList::drumkitLoadedEvent() {
        updateInstrumentLines();
}
 
void PatternEditorInstrumentList::repaintInstrumentLines() {
        auto pHydrogen = Hydrogen::get_instance();
        auto pSong = pHydrogen->getSong();
        auto pInstrList = pSong->getInstrumentList();
 
        unsigned nInstruments = pInstrList->size();
        for ( unsigned nInstr = 0; nInstr < MAX_INSTRUMENTS; ++nInstr ) {
                if ( nInstr < nInstruments &&
                         m_pInstrumentLine[ nInstr ] != nullptr ) {
                        m_pInstrumentLine[ nInstr ]->update();
                }
        }
}
 
void PatternEditorInstrumentList::selectedInstrumentChangedEvent() {
 
        auto pHydrogen = Hydrogen::get_instance();
        auto pSong = pHydrogen->getSong();
        auto pInstrList = pSong->getInstrumentList();
 
        unsigned nSelectedInstr = pHydrogen->getSelectedInstrumentNumber();
 
        unsigned nInstruments = pInstrList->size();
        for ( unsigned nInstr = 0; nInstr < MAX_INSTRUMENTS; ++nInstr ) {
                if ( nInstr < nInstruments &&
                         m_pInstrumentLine[ nInstr ] != nullptr ) {
                        
                        InstrumentLine *pLine = m_pInstrumentLine[ nInstr ];
                        pLine->setSelected( nInstr == nSelectedInstr );
                }
        }
}
 
void PatternEditorInstrumentList::updateInstrumentLines()
{
        Hydrogen *pHydrogen = Hydrogen::get_instance();
        std::shared_ptr<Song> pSong = pHydrogen->getSong();
        auto pInstrList = pSong->getInstrumentList();
 
        unsigned nSelectedInstr = pHydrogen->getSelectedInstrumentNumber();
 
        unsigned nInstruments = pInstrList->size();
        for ( unsigned nInstr = 0; nInstr < MAX_INSTRUMENTS; ++nInstr ) {
                if ( nInstr >= nInstruments ) { // unused instrument! let's hide and destroy the mixerline!
                        if ( m_pInstrumentLine[ nInstr ] ) {
                                delete m_pInstrumentLine[ nInstr ];
                                m_pInstrumentLine[ nInstr ] = nullptr;
 
                                int newHeight = m_nGridHeight * nInstruments + 1;
                                resize( width(), newHeight );
                        }
                        continue;
                }
                else {
                        if ( m_pInstrumentLine[ nInstr ] == nullptr ) {
                                // the instrument line doesn't exists..I'll create a new one!
                                m_pInstrumentLine[ nInstr ] = createInstrumentLine();
                                m_pInstrumentLine[nInstr]->move( 0, m_nGridHeight * nInstr + 1 );
                                m_pInstrumentLine[nInstr]->show();
 
                                int newHeight = m_nGridHeight * nInstruments;
                                resize( width(), newHeight );
                        }
                        InstrumentLine *pLine = m_pInstrumentLine[ nInstr ];
                        auto pInstr = pInstrList->get(nInstr);
                        assert(pInstr);
 
                        pLine->setNumber(nInstr);
                        pLine->setName( pInstr->get_name() );
                        pLine->setSelected( nInstr == nSelectedInstr );
                        pLine->setMuted( pInstr->is_muted() );
                        pLine->setSoloed( pInstr->is_soloed() );
 
                        pLine->setSamplesMissing( pInstr->has_missing_samples() );
                }
        }
 
}
        
void PatternEditorInstrumentList::dragEnterEvent(QDragEnterEvent *event)
{
        event->acceptProposedAction();
}
 
void PatternEditorInstrumentList::dropEvent(QDropEvent *event)
{
        //WARNINGLOG("Drop!");
        if ( ! event->mimeData()->hasFormat("text/plain") ) {
                event->ignore();
                return;
        }
 
        auto pHydrogen = Hydrogen::get_instance();
        std::shared_ptr<Song> pSong = pHydrogen->getSong();
        auto pInstrumentList = pSong->getInstrumentList();
        int nInstruments = pInstrumentList->size();
        if ( nInstruments >= MAX_INSTRUMENTS ) {
                event->ignore();
                QMessageBox::critical( this, "Hydrogen", tr( "Unable to insert further instruments. Maximum possible number" ) +
                                                           QString( ": %1" ).arg( MAX_INSTRUMENTS ) );
                return;
        }
        
        QString sText = event->mimeData()->text();
        
 
        if ( sText.startsWith("Songs:") ||
                 sText.startsWith("Patterns:") ||
                 sText.startsWith("move pattern:") ||
                 sText.startsWith("drag pattern:") ) {
                return;
        }
 
        if (sText.startsWith("move instrument:")) {
 
                int nSourceInstrument = pHydrogen->getSelectedInstrumentNumber();
 
                // Starting point for instument list is 50 lower than
                // on the drum pattern editor
 
                int pos_y = ( event->pos().x() >= m_nEditorWidth ) ? event->pos().y() - 50 : event->pos().y();
 
                int nTargetInstrument = pos_y / m_nGridHeight;
 
                if( nTargetInstrument >= pInstrumentList->size() ){
                        nTargetInstrument = pInstrumentList->size() - 1;
                }
 
                if ( nSourceInstrument == nTargetInstrument ) {
                        event->acceptProposedAction();
                        return;
                }
                
                SE_moveInstrumentAction *action = new SE_moveInstrumentAction( nSourceInstrument, nTargetInstrument );
                HydrogenApp::get_instance()->m_pUndoStack->push( action );
 
                event->acceptProposedAction();
        }
        if( sText.startsWith("importInstrument:") ) {
                //an instrument was dragged from the soundlibrary browser to the patterneditor
 
                sText = sText.remove(0,QString("importInstrument:").length());
 
                QStringList tokens = sText.split( "::" );
                QString sDrumkitPath = tokens.at( 0 );
                QString sInstrumentName = tokens.at( 1 );
 
                int nTargetInstrument = event->pos().y() / m_nGridHeight;
 
                /*
                                "X > 181": border between the instrument names on the left and the grid
                                Because the right part of the grid starts above the name column, we have to subtract the difference
                */
                if (  event->pos().x() > 181 ) {
                        nTargetInstrument = ( event->pos().y() - 90 )  / m_nGridHeight ;
                }
 
                if( nTargetInstrument > pInstrumentList->size() ){
                        nTargetInstrument = pInstrumentList->size();
                }
 
                auto pCommonString = HydrogenApp::get_instance()->getCommonStrings();
                
                if ( sDrumkitPath.isEmpty() ) {
                        QMessageBox::critical( this, "Hydrogen", pCommonString->getInstrumentLoadError() );
                        return;
                }
 
                SE_dragInstrumentAction *action = new SE_dragInstrumentAction( sDrumkitPath, sInstrumentName, nTargetInstrument );
                HydrogenApp::get_instance()->m_pUndoStack->push( action );
 
                event->acceptProposedAction();
        }
}
 
 
 
void PatternEditorInstrumentList::mousePressEvent(QMouseEvent *event)
{
        if (event->button() == Qt::LeftButton) {
                __drag_start_position = event->pos();
        }
 
}
 
 
 
void PatternEditorInstrumentList::mouseMoveEvent(QMouseEvent *event)
{
        if (!(event->buttons() & Qt::LeftButton)) {
                return;
        }
        if ( abs(event->pos().y() - __drag_start_position.y()) < (int)m_nGridHeight) {
                return;
        }
 
        Hydrogen *pHydrogen = Hydrogen::get_instance();
        auto pSelectedInstrument = pHydrogen->getSelectedInstrument();
        if ( pSelectedInstrument == nullptr ) {
                ERRORLOG( "No instrument selected" );
                return;
        }
 
        QString sText = QString("move instrument:%1").arg( pSelectedInstrument->get_name() );
 
        QDrag *pDrag = new QDrag(this);
        QMimeData *pMimeData = new QMimeData;
 
        pMimeData->setText( sText );
        pDrag->setMimeData( pMimeData);
 
        m_pDragScroller->startDrag();
        pDrag->exec( Qt::CopyAction | Qt::MoveAction );
        m_pDragScroller->endDrag();
 
        // propago l'evento
        QWidget::mouseMoveEvent(event);
}
 
 
void PatternEditorInstrumentList::instrumentParametersChangedEvent( int nInstrumentNumber ) {
        auto pInstrumentList = Hydrogen::get_instance()->getSong()->getInstrumentList();
 
        if ( nInstrumentNumber == -1 ) {
                // Update all lines.
                for ( int ii = 0; ii < MAX_INSTRUMENTS; ++ii ) {
                        auto pInstrumentLine = m_pInstrumentLine[ ii ];
                        if ( pInstrumentLine != nullptr ) {
                                auto pInstrument = pInstrumentList->get( ii );
                                if ( pInstrument == nullptr ) {
                                        ERRORLOG( QString( "Instrument [%1] associated to InstrumentLine [%1] not found" )
                                                          .arg( ii ) );
                                        return;
                                }
                                
                                pInstrumentLine->setName( pInstrument->get_name() );
                                pInstrumentLine->setMuted( pInstrument->is_muted() );
                                pInstrumentLine->setSoloed( pInstrument->is_soloed() );
                        }
                }
        }
        else {
                // Update a specific line
                auto pInstrument = pInstrumentList->get( nInstrumentNumber );
                if ( pInstrument == nullptr ) {
                        ERRORLOG( QString( "Instrument [%1] not found" )
                                          .arg( nInstrumentNumber ) );
                        return;
                }
        
                auto pInstrumentLine = m_pInstrumentLine[ nInstrumentNumber ];
                if ( pInstrumentLine == nullptr ) {
                        ERRORLOG( QString( "No InstrumentLine for instrument [%1] created yet" )
                                          .arg( nInstrumentNumber ) );
                        return;
                }
 
                pInstrumentLine->setName( pInstrument->get_name() );
                pInstrumentLine->setMuted( pInstrument->is_muted() );
                pInstrumentLine->setSoloed( pInstrument->is_soloed() );
        }
}