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Pattern.cpp
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/*
* Pattern.cpp - implementation of class pattern which holds notes
*
* Copyright (c) 2004-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
* Copyright (c) 2005-2007 Danny McRae <khjklujn/at/yahoo.com>
*
* This file is part of LMMS - https://lmms.io
*
* 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 (see COPYING); if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#include "Pattern.h"
#include <QTimer>
#include <QMenu>
#include <QMouseEvent>
#include <QPainter>
#include <QPushButton>
#include "InstrumentTrack.h"
#include "gui_templates.h"
#include "embed.h"
#include "GuiApplication.h"
#include "PianoRoll.h"
#include "RenameDialog.h"
#include "SampleBuffer.h"
#include "AudioSampleRecorder.h"
#include "BBTrackContainer.h"
#include "StringPairDrag.h"
#include "MainWindow.h"
#include <limits>
QPixmap * PatternView::s_stepBtnOn0 = NULL;
QPixmap * PatternView::s_stepBtnOn200 = NULL;
QPixmap * PatternView::s_stepBtnOff = NULL;
QPixmap * PatternView::s_stepBtnOffLight = NULL;
Pattern::Pattern( InstrumentTrack * _instrument_track ) :
TrackContentObject( _instrument_track ),
m_instrumentTrack( _instrument_track ),
m_patternType( BeatPattern ),
m_steps( MidiTime::stepsPerTact() )
{
setName( _instrument_track->name() );
if( _instrument_track->trackContainer()
== Engine::getBBTrackContainer() )
{
resizeToFirstTrack();
}
init();
setAutoResize( true );
}
Pattern::Pattern( const Pattern& other ) :
TrackContentObject( other.m_instrumentTrack ),
m_instrumentTrack( other.m_instrumentTrack ),
m_patternType( other.m_patternType ),
m_steps( other.m_steps )
{
for( NoteVector::ConstIterator it = other.m_notes.begin(); it != other.m_notes.end(); ++it )
{
m_notes.push_back( new Note( **it ) );
}
init();
switch( getTrack()->trackContainer()->type() )
{
case TrackContainer::BBContainer:
setAutoResize( true );
break;
case TrackContainer::SongContainer:
// move down
default:
setAutoResize( false );
break;
}
}
Pattern::~Pattern()
{
emit destroyedPattern( this );
for( NoteVector::Iterator it = m_notes.begin();
it != m_notes.end(); ++it )
{
delete *it;
}
m_notes.clear();
}
void Pattern::resizeToFirstTrack()
{
// Resize this track to be the same as existing tracks in the BB
const TrackContainer::TrackList & tracks =
m_instrumentTrack->trackContainer()->tracks();
for(unsigned int trackID = 0; trackID < tracks.size(); ++trackID)
{
if(tracks.at(trackID)->type() == Track::InstrumentTrack)
{
if(tracks.at(trackID) != m_instrumentTrack)
{
unsigned int currentTCO = m_instrumentTrack->
getTCOs().indexOf(this);
m_steps = static_cast<Pattern *>
(tracks.at(trackID)->getTCO(currentTCO))
->m_steps;
}
break;
}
}
}
void Pattern::init()
{
connect( Engine::getSong(), SIGNAL( timeSignatureChanged( int, int ) ),
this, SLOT( changeTimeSignature() ) );
saveJournallingState( false );
updateLength();
restoreJournallingState();
}
void Pattern::updateLength()
{
if( m_patternType == BeatPattern )
{
changeLength( beatPatternLength() );
updateBBTrack();
return;
}
tick_t max_length = MidiTime::ticksPerTact();
for( NoteVector::ConstIterator it = m_notes.begin();
it != m_notes.end(); ++it )
{
if( ( *it )->length() > 0 )
{
max_length = qMax<tick_t>( max_length,
( *it )->endPos() );
}
}
changeLength( MidiTime( max_length ).nextFullTact() *
MidiTime::ticksPerTact() );
updateBBTrack();
}
MidiTime Pattern::beatPatternLength() const
{
tick_t max_length = MidiTime::ticksPerTact();
for( NoteVector::ConstIterator it = m_notes.begin();
it != m_notes.end(); ++it )
{
if( ( *it )->length() < 0 )
{
max_length = qMax<tick_t>( max_length,
( *it )->pos() + 1 );
}
}
if( m_steps != MidiTime::stepsPerTact() )
{
max_length = m_steps * MidiTime::ticksPerTact() /
MidiTime::stepsPerTact();
}
return MidiTime( max_length ).nextFullTact() * MidiTime::ticksPerTact();
}
Note * Pattern::addNote( const Note & _new_note, const bool _quant_pos )
{
Note * new_note = new Note( _new_note );
if( _quant_pos && gui->pianoRoll() )
{
new_note->quantizePos( gui->pianoRoll()->quantization() );
}
instrumentTrack()->lock();
m_notes.insert(std::upper_bound(m_notes.begin(), m_notes.end(), new_note, Note::lessThan), new_note);
instrumentTrack()->unlock();
checkType();
updateLength();
emit dataChanged();
return new_note;
}
void Pattern::removeNote( Note * _note_to_del )
{
instrumentTrack()->lock();
NoteVector::Iterator it = m_notes.begin();
while( it != m_notes.end() )
{
if( *it == _note_to_del )
{
delete *it;
m_notes.erase( it );
break;
}
++it;
}
instrumentTrack()->unlock();
checkType();
updateLength();
emit dataChanged();
}
// returns a pointer to the note at specified step, or NULL if note doesn't exist
Note * Pattern::noteAtStep( int _step )
{
for( NoteVector::Iterator it = m_notes.begin(); it != m_notes.end();
++it )
{
if( ( *it )->pos() == MidiTime::stepPosition( _step )
&& ( *it )->length() < 0 )
{
return *it;
}
}
return NULL;
}
void Pattern::rearrangeAllNotes()
{
// sort notes by start time
std::sort(m_notes.begin(), m_notes.end(), Note::lessThan);
}
void Pattern::clearNotes()
{
instrumentTrack()->lock();
for( NoteVector::Iterator it = m_notes.begin(); it != m_notes.end();
++it )
{
delete *it;
}
m_notes.clear();
instrumentTrack()->unlock();
checkType();
emit dataChanged();
}
Note * Pattern::addStepNote( int step )
{
return addNote( Note( MidiTime( -DefaultTicksPerTact ),
MidiTime::stepPosition( step ) ), false );
}
void Pattern::setStep( int step, bool enabled )
{
if( enabled )
{
if ( !noteAtStep( step ) )
{
addStepNote( step );
}
return;
}
while( Note * note = noteAtStep( step ) )
{
removeNote( note );
}
}
void Pattern::setType( PatternTypes _new_pattern_type )
{
if( _new_pattern_type == BeatPattern ||
_new_pattern_type == MelodyPattern )
{
m_patternType = _new_pattern_type;
}
}
void Pattern::checkType()
{
NoteVector::Iterator it = m_notes.begin();
while( it != m_notes.end() )
{
if( ( *it )->length() > 0 )
{
setType( MelodyPattern );
return;
}
++it;
}
setType( BeatPattern );
}
void Pattern::saveSettings( QDomDocument & _doc, QDomElement & _this )
{
_this.setAttribute( "type", m_patternType );
_this.setAttribute( "name", name() );
// as the target of copied/dragged pattern is always an existing
// pattern, we must not store actual position, instead we store -1
// which tells loadSettings() not to mess around with position
if( _this.parentNode().nodeName() == "clipboard" ||
_this.parentNode().nodeName() == "dnddata" )
{
_this.setAttribute( "pos", -1 );
}
else
{
_this.setAttribute( "pos", startPosition() );
}
_this.setAttribute( "muted", isMuted() );
_this.setAttribute( "steps", m_steps );
// now save settings of all notes
for( NoteVector::Iterator it = m_notes.begin();
it != m_notes.end(); ++it )
{
( *it )->saveState( _doc, _this );
}
}
void Pattern::loadSettings( const QDomElement & _this )
{
m_patternType = static_cast<PatternTypes>( _this.attribute( "type"
).toInt() );
setName( _this.attribute( "name" ) );
if( _this.attribute( "pos" ).toInt() >= 0 )
{
movePosition( _this.attribute( "pos" ).toInt() );
}
if( _this.attribute( "muted" ).toInt() != isMuted() )
{
toggleMute();
}
clearNotes();
QDomNode node = _this.firstChild();
while( !node.isNull() )
{
if( node.isElement() &&
!node.toElement().attribute( "metadata" ).toInt() )
{
Note * n = new Note;
n->restoreState( node.toElement() );
m_notes.push_back( n );
}
node = node.nextSibling();
}
m_steps = _this.attribute( "steps" ).toInt();
if( m_steps == 0 )
{
m_steps = MidiTime::stepsPerTact();
}
checkType();
updateLength();
emit dataChanged();
}
Pattern * Pattern::previousPattern() const
{
return adjacentPatternByOffset(-1);
}
Pattern * Pattern::nextPattern() const
{
return adjacentPatternByOffset(1);
}
Pattern * Pattern::adjacentPatternByOffset(int offset) const
{
QVector<TrackContentObject *> tcos = m_instrumentTrack->getTCOs();
int tcoNum = m_instrumentTrack->getTCONum(this);
return dynamic_cast<Pattern*>(tcos.value(tcoNum + offset, NULL));
}
void Pattern::clear()
{
addJournalCheckPoint();
clearNotes();
}
void Pattern::addSteps()
{
m_steps += MidiTime::stepsPerTact();
updateLength();
emit dataChanged();
}
void Pattern::cloneSteps()
{
int oldLength = m_steps;
m_steps *= 2; // cloning doubles the track
for(int i = 0; i < oldLength; ++i )
{
Note *toCopy = noteAtStep( i );
if( toCopy )
{
setStep( oldLength + i, true );
Note *newNote = noteAtStep( oldLength + i );
newNote->setKey( toCopy->key() );
newNote->setLength( toCopy->length() );
newNote->setPanning( toCopy->getPanning() );
newNote->setVolume( toCopy->getVolume() );
}
}
updateLength();
emit dataChanged();
}
void Pattern::removeSteps()
{
int n = MidiTime::stepsPerTact();
if( n < m_steps )
{
for( int i = m_steps - n; i < m_steps; ++i )
{
setStep( i, false );
}
m_steps -= n;
updateLength();
emit dataChanged();
}
}
TrackContentObjectView * Pattern::createView( TrackView * _tv )
{
return new PatternView( this, _tv );
}
void Pattern::updateBBTrack()
{
if( getTrack()->trackContainer() == Engine::getBBTrackContainer() )
{
Engine::getBBTrackContainer()->updateBBTrack( this );
}
if( gui && gui->pianoRoll() && gui->pianoRoll()->currentPattern() == this )
{
gui->pianoRoll()->update();
}
}
bool Pattern::empty()
{
for( NoteVector::ConstIterator it = m_notes.begin();
it != m_notes.end(); ++it )
{
if( ( *it )->length() != 0 )
{
return false;
}
}
return true;
}
void Pattern::changeTimeSignature()
{
MidiTime last_pos = MidiTime::ticksPerTact() - 1;
for( NoteVector::ConstIterator cit = m_notes.begin();
cit != m_notes.end(); ++cit )
{
if( ( *cit )->length() < 0 && ( *cit )->pos() > last_pos )
{
last_pos = ( *cit )->pos()+MidiTime::ticksPerTact() /
MidiTime::stepsPerTact();
}
}
last_pos = last_pos.nextFullTact() * MidiTime::ticksPerTact();
m_steps = qMax<tick_t>( MidiTime::stepsPerTact(),
last_pos.getTact() * MidiTime::stepsPerTact() );
updateLength();
}
PatternView::PatternView( Pattern* pattern, TrackView* parent ) :
TrackContentObjectView( pattern, parent ),
m_pat( pattern ),
m_paintPixmap(),
m_noteFillColor(255, 255, 255, 220),
m_noteBorderColor(255, 255, 255, 220),
m_mutedNoteFillColor(100, 100, 100, 220),
m_mutedNoteBorderColor(100, 100, 100, 220)
{
connect( gui->pianoRoll(), SIGNAL( currentPatternChanged() ),
this, SLOT( update() ) );
if( s_stepBtnOn0 == NULL )
{
s_stepBtnOn0 = new QPixmap( embed::getIconPixmap(
"step_btn_on_0" ) );
}
if( s_stepBtnOn200 == NULL )
{
s_stepBtnOn200 = new QPixmap( embed::getIconPixmap(
"step_btn_on_200" ) );
}
if( s_stepBtnOff == NULL )
{
s_stepBtnOff = new QPixmap( embed::getIconPixmap(
"step_btn_off" ) );
}
if( s_stepBtnOffLight == NULL )
{
s_stepBtnOffLight = new QPixmap( embed::getIconPixmap(
"step_btn_off_light" ) );
}
update();
setStyle( QApplication::style() );
}
PatternView::~PatternView()
{
}
void PatternView::update()
{
ToolTip::add(this, m_pat->name());
TrackContentObjectView::update();
}
void PatternView::openInPianoRoll()
{
gui->pianoRoll()->setCurrentPattern( m_pat );
gui->pianoRoll()->parentWidget()->show();
gui->pianoRoll()->show();
gui->pianoRoll()->setFocus();
}
void PatternView::resetName()
{
m_pat->setName( m_pat->m_instrumentTrack->name() );
}
void PatternView::changeName()
{
QString s = m_pat->name();
RenameDialog rename_dlg( s );
rename_dlg.exec();
m_pat->setName( s );
}
void PatternView::constructContextMenu( QMenu * _cm )
{
QAction * a = new QAction( embed::getIconPixmap( "piano" ),
tr( "Open in piano-roll" ), _cm );
_cm->insertAction( _cm->actions()[0], a );
connect( a, SIGNAL( triggered( bool ) ),
this, SLOT( openInPianoRoll() ) );
_cm->insertSeparator( _cm->actions()[1] );
_cm->addSeparator();
_cm->addAction( embed::getIconPixmap( "edit_erase" ),
tr( "Clear all notes" ), m_pat, SLOT( clear() ) );
_cm->addSeparator();
_cm->addAction( embed::getIconPixmap( "reload" ), tr( "Reset name" ),
this, SLOT( resetName() ) );
_cm->addAction( embed::getIconPixmap( "edit_rename" ),
tr( "Change name" ),
this, SLOT( changeName() ) );
if ( m_pat->type() == Pattern::BeatPattern )
{
_cm->addSeparator();
_cm->addAction( embed::getIconPixmap( "step_btn_add" ),
tr( "Add steps" ), m_pat, SLOT( addSteps() ) );
_cm->addAction( embed::getIconPixmap( "step_btn_remove" ),
tr( "Remove steps" ), m_pat, SLOT( removeSteps() ) );
_cm->addAction( embed::getIconPixmap( "step_btn_duplicate" ),
tr( "Clone Steps" ), m_pat, SLOT( cloneSteps() ) );
}
}
void PatternView::mousePressEvent( QMouseEvent * _me )
{
if( _me->button() == Qt::LeftButton &&
m_pat->m_patternType == Pattern::BeatPattern &&
( fixedTCOs() || pixelsPerTact() >= 96 ||
m_pat->m_steps != MidiTime::stepsPerTact() ) &&
_me->y() > height() - s_stepBtnOff->height() )
// when mouse button is pressed in beat/bassline -mode
{
// get the step number that was clicked on and
// do calculations in floats to prevent rounding errors...
float tmp = ( ( float(_me->x()) - TCO_BORDER_WIDTH ) *
float( m_pat -> m_steps ) ) / float(width() - TCO_BORDER_WIDTH*2);
int step = int( tmp );
// debugging to ensure we get the correct step...
// qDebug( "Step (%f) %d", tmp, step );
if( step >= m_pat->m_steps )
{
qDebug( "Something went wrong in pattern.cpp: step %d doesn't exist in pattern!", step );
return;
}
Note * n = m_pat->noteAtStep( step );
if( n == NULL )
{
m_pat->addStepNote( step );
}
else // note at step found
{
m_pat->addJournalCheckPoint();
m_pat->setStep( step, false );
}
Engine::getSong()->setModified();
update();
if( gui->pianoRoll()->currentPattern() == m_pat )
{
gui->pianoRoll()->update();
}
}
else
// if not in beat/bassline -mode, let parent class handle the event
{
TrackContentObjectView::mousePressEvent( _me );
}
}
void PatternView::mouseDoubleClickEvent(QMouseEvent *_me)
{
if( _me->button() != Qt::LeftButton )
{
_me->ignore();
return;
}
if( m_pat->m_patternType == Pattern::MelodyPattern || !fixedTCOs() )
{
openInPianoRoll();
}
}
void PatternView::wheelEvent( QWheelEvent * _we )
{
if( m_pat->m_patternType == Pattern::BeatPattern &&
( fixedTCOs() || pixelsPerTact() >= 96 ||
m_pat->m_steps != MidiTime::stepsPerTact() ) &&
_we->y() > height() - s_stepBtnOff->height() )
{
// get the step number that was wheeled on and
// do calculations in floats to prevent rounding errors...
float tmp = ( ( float(_we->x()) - TCO_BORDER_WIDTH ) *
float( m_pat -> m_steps ) ) / float(width() - TCO_BORDER_WIDTH*2);
int step = int( tmp );
if( step >= m_pat->m_steps )
{
return;
}
Note * n = m_pat->noteAtStep( step );
if( !n && _we->delta() > 0 )
{
n = m_pat->addStepNote( step );
n->setVolume( 0 );
}
if( n != NULL )
{
int vol = n->getVolume();
if( _we->delta() > 0 )
{
n->setVolume( qMin( 100, vol + 5 ) );
}
else
{
n->setVolume( qMax( 0, vol - 5 ) );
}
Engine::getSong()->setModified();
update();
if( gui->pianoRoll()->currentPattern() == m_pat )
{
gui->pianoRoll()->update();
}
}
_we->accept();
}
else
{
TrackContentObjectView::wheelEvent( _we );
}
}
static int computeNoteRange(int minKey, int maxKey)
{
return (maxKey - minKey) + 1;
}
void PatternView::paintEvent( QPaintEvent * )
{
QPainter painter( this );
if( !needsUpdate() )
{
painter.drawPixmap( 0, 0, m_paintPixmap );
return;
}
setNeedsUpdate( false );
if (m_paintPixmap.isNull() || m_paintPixmap.size() != size())
{
m_paintPixmap = QPixmap(size());
}
QPainter p( &m_paintPixmap );
bool const muted = m_pat->getTrack()->isMuted() || m_pat->isMuted();
bool current = gui->pianoRoll()->currentPattern() == m_pat;
bool beatPattern = m_pat->m_patternType == Pattern::BeatPattern;
// state: selected, normal, beat pattern, muted
QColor c = isSelected() ? selectedColor() : ( ( !muted && !beatPattern )
? painter.background().color() : ( beatPattern
? BBPatternBackground() : mutedBackgroundColor() ) );
// invert the gradient for the background in the B&B editor
QLinearGradient lingrad( 0, 0, 0, height() );
lingrad.setColorAt( beatPattern ? 0 : 1, c.darker( 300 ) );
lingrad.setColorAt( beatPattern ? 1 : 0, c );
// paint a black rectangle under the pattern to prevent glitches with transparent backgrounds
p.fillRect( rect(), QColor( 0, 0, 0 ) );
if( gradient() )
{
p.fillRect( rect(), lingrad );
}
else
{
p.fillRect( rect(), c );
}
// Check whether we will paint a text box and compute its potential height
// This is needed so we can paint the notes underneath it.
bool const isDefaultName = m_pat->name() == m_pat->instrumentTrack()->name();
bool const drawTextBox = !beatPattern && !isDefaultName;
// TODO Warning! This might cause problems if TrackContentObjectView::paintTextLabel changes
int textBoxHeight = 0;
const int textTop = TCO_BORDER_WIDTH + 1;
if (drawTextBox)
{
QFont labelFont = this->font();
labelFont.setHintingPreference( QFont::PreferFullHinting );
QFontMetrics fontMetrics(labelFont);
textBoxHeight = fontMetrics.height() + 2 * textTop;
}
// Compute pixels per tact
const int baseWidth = fixedTCOs() ? parentWidget()->width() : width();
const float pixelsPerTact = ( baseWidth - 2 * TCO_BORDER_WIDTH ) / (float) m_pat->length().getTact();
// Length of one tact/beat in the [0,1] x [0,1] coordinate system
const float tactLength = 1. / m_pat->length().getTact();
const float tickLength = tactLength / MidiTime::ticksPerTact();
const int x_base = TCO_BORDER_WIDTH;
// melody pattern paint event
NoteVector const & noteCollection = m_pat->m_notes;
if( m_pat->m_patternType == Pattern::MelodyPattern && !noteCollection.empty() )
{
// Compute the minimum and maximum key in the pattern
// so that we know how much there is to draw.
int maxKey = std::numeric_limits<int>::min();
int minKey = std::numeric_limits<int>::max();
for (Note const * note : noteCollection)
{
int const key = note->key();
maxKey = qMax( maxKey, key );
minKey = qMin( minKey, key );
}
// If needed adjust the note range so that we always have paint a certain interval
int const minimalNoteRange = 12; // Always paint at least one octave
int const actualNoteRange = computeNoteRange(minKey, maxKey);
if (actualNoteRange < minimalNoteRange)
{
int missingNumberOfNotes = minimalNoteRange - actualNoteRange;
minKey = std::max(0, minKey - missingNumberOfNotes / 2);
maxKey = maxKey + missingNumberOfNotes / 2;
if (missingNumberOfNotes % 2 == 1)
{
// Put more range at the top to bias drawing towards the bottom
++maxKey;
}
}
int const adjustedNoteRange = computeNoteRange(minKey, maxKey);
// Transform such that [0, 1] x [0, 1] paints in the correct area
float distanceToTop = textBoxHeight;
// This moves the notes smoothly under the text
int widgetHeight = height();
int fullyAtTopAtLimit = MINIMAL_TRACK_HEIGHT;
int fullyBelowAtLimit = 4 * fullyAtTopAtLimit;
if (widgetHeight <= fullyBelowAtLimit)
{
if (widgetHeight <= fullyAtTopAtLimit)
{
distanceToTop = 0;
}
else
{
float const a = 1. / (fullyAtTopAtLimit - fullyBelowAtLimit);
float const b = - float(fullyBelowAtLimit) / (fullyAtTopAtLimit - fullyBelowAtLimit);
float const scale = a * widgetHeight + b;
distanceToTop = (1. - scale) * textBoxHeight;
}
}
int const notesBorder = 4; // Border for the notes towards the top and bottom in pixels
// The relavant painting code starts here
p.save();
p.translate(0., distanceToTop + notesBorder);
p.scale(width(), height() - distanceToTop - 2 * notesBorder);
// set colour based on mute status
QColor noteFillColor = muted ? getMutedNoteFillColor() : getNoteFillColor();
QColor noteBorderColor = muted ? getMutedNoteBorderColor() : getNoteBorderColor();
bool const drawAsLines = height() < 64;
if (drawAsLines)
{
p.setPen(noteFillColor);
}
else
{
p.setPen(noteBorderColor);
p.setRenderHint(QPainter::Antialiasing);
}
// Needed for Qt5 although the documentation for QPainter::setPen(QColor) as it's used above
// states that it should already set a width of 0.
QPen pen = p.pen();
pen.setWidth(0);
p.setPen(pen);
float const noteHeight = 1. / adjustedNoteRange;
// scan through all the notes and draw them on the pattern
for (Note const * currentNote : noteCollection)