TargetWaveDisplay.cpp

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/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 * Copyright(c) 2008-2025 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 "TargetWaveDisplay.h"
 
#include <core/Basics/Sample.h>
#include <core/Basics/Song.h>
#include <core/Basics/Instrument.h>
#include <core/Basics/InstrumentLayer.h>
 
#include <memory>
 
#include "../Compatibility/MouseEvent.h"
#include "HydrogenApp.h"
#include "SampleEditor.h"
 
using namespace H2Core;
 
#define UI_WIDTH   841
#define UI_HEIGHT   91
 
#include <vector>
#include <algorithm>
#include "../Skin.h"
 
static TargetWaveDisplay::EnvelopeEditMode getEnvelopeEditMode();
 
TargetWaveDisplay::TargetWaveDisplay(QWidget* pParent)
 : QWidget( pParent )
 , m_sSampleName( "" )
{
//      setAttribute(Qt::WA_OpaquePaintEvent);
 
        //
        int w = UI_WIDTH;
        int h = UI_HEIGHT;
        resize( w, h );
 
        bool ok = m_Background.load( Skin::getImagePath() + "/waveDisplay/targetsamplewavedisplay.png" );
        if( ok == false ){
                ERRORLOG( "Error loading pixmap" );
        }
 
        m_EditMode = EnvelopeEditMode::VELOCITY;
        m_pPeakData_Left = new int[ w ];
        m_pPeakData_Right = new int[ w ];
        m_sInfo = "";
        m_nX = -10;
        m_nY = -10;
        m_nLocator = -1;
        m_UpdatePosition = false;
        m_nSelectedEnvelopePoint = -1;
        m_nSnapRadius = 6;
        setMouseTracking(true);
}
 
 
 
 
TargetWaveDisplay::~TargetWaveDisplay()
{
        //INFOLOG( "DESTROY" );
 
        delete[] m_pPeakData_Left;
        delete[] m_pPeakData_Right;
}
 
static void paintEnvelope(Sample::VelocityEnvelope &envelope, QPainter &painter,
        int selected, const QColor & lineColor, const QColor & handleColor, const QColor & selectedColor)
{
        if (envelope.empty()) {
                return;
        }
        
        for ( int i = 0; i < static_cast<int>(envelope.size()) -1; i++){
                painter.setPen( QPen(lineColor, 1 , Qt::SolidLine) );
                painter.drawLine( envelope[i].frame, envelope[i].value, envelope[i + 1].frame, envelope[i +1].value );
                if ( i == selected ) {
                        painter.setBrush( selectedColor );
                } else {
                        painter.setBrush( handleColor );
                }
                painter.drawEllipse ( envelope[i].frame - 6/2, envelope[i].value  - 6/2, 6, 6 );
        }
        
        // draw first and last points as squares
        if ( 0 == selected ) {
                painter.setBrush( selectedColor );
        } else {
                painter.setBrush( handleColor );
        }
        painter.drawRect ( envelope[0].frame - 12/2, envelope[0].value  - 6/2, 12, 6 );
 
        if ( envelope.size() - 1 == selected ) {
                painter.setBrush( selectedColor );
        } else {
                painter.setBrush( handleColor );
        }
        painter.drawRect ( envelope[envelope.size() -1].frame - 12/2, envelope[envelope.size() -1].value  - 6/2, 12, 6 );
}
 
void TargetWaveDisplay::paintEvent(QPaintEvent *ev)
{
        QPainter painter( this );
 
        m_EditMode = getEnvelopeEditMode();
 
        painter.setRenderHint( QPainter::Antialiasing );
        painter.drawPixmap( ev->rect(), m_Background, ev->rect() );
        painter.setPen( QColor( 252, 142, 73 ));
 
        int VCenter = height() / 2;
        int LCenter = VCenter -4;
        int RCenter = VCenter +4;
 
        for ( int x = 0; x < width() - 1; x++ ) {
                painter.drawLine( x, LCenter, x, -m_pPeakData_Left[x +1] +LCenter  );
        }
 
        painter.setPen( QColor( 116, 186, 255 ));
        for ( int x = 0; x < width() - 1; x++ ) {
                painter.drawLine( x, RCenter, x, -m_pPeakData_Right[x +1] +RCenter  );
        }
 
        QFont font;
        font.setWeight( QFont::Bold );
        painter.setFont( font );
 
        painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
        painter.setPen( QPen( QColor( 255, 255, 255 ), 1, Qt::SolidLine ) );
        painter.drawLine( m_nLocator, 4, m_nLocator, height() -4);
 
        QColor volumeLineColor = QColor( 255, 255, 255, 200);
        QColor volumeHandleColor = QColor( 99, 160, 233);
        QColor panLineColor = QColor( 249, 235, 116, 200 );
        QColor panHandleColor = QColor( 77, 189, 55 );
        QColor selectedtHandleColor = QColor( 255, 100, 90 );
        //volume line
 
        paintEnvelope(m_VelocityEnvelope, painter, m_EditMode == TargetWaveDisplay::VELOCITY ? m_nSelectedEnvelopePoint : -1,
                volumeLineColor, volumeHandleColor, selectedtHandleColor);
        //pan line
        paintEnvelope(m_PanEnvelope, painter, m_EditMode == TargetWaveDisplay::PAN ? m_nSelectedEnvelopePoint : -1,
                panLineColor, panHandleColor, selectedtHandleColor);
 
        painter.setPen( QPen( QColor( 255, 255, 255 ), 1, Qt::DotLine ) );
        painter.drawLine( 0, LCenter, UI_WIDTH, LCenter );
        painter.setPen( QPen( QColor( 255, 255, 255 ), 1, Qt::DotLine ) );
        painter.drawLine( 0, RCenter, UI_WIDTH, RCenter );
 
        if (m_nY < 50){     
                if (m_nX < 790){
                        painter.drawText( m_nX +5, m_nY, 60, 20, Qt::AlignLeft, QString( m_sInfo ) );
                }
                else
                {
                        painter.drawText( m_nX - 65, m_nY, 60, 20, Qt::AlignRight, QString( m_sInfo ) );
                }
                
        }else
        {
                if (m_nX < 790){
                        painter.drawText( m_nX +5, m_nY -20, 60, 20, Qt::AlignLeft, QString( m_sInfo ) );
                }
                else
                {
                        painter.drawText( m_nX - 65, m_nY -20, 60, 20, Qt::AlignRight, QString( m_sInfo ) );
                }
        }
 
}
 
 
void TargetWaveDisplay::updateDisplayPointer()
{
        update();
}
 
void TargetWaveDisplay::paintLocatorEventTargetDisplay( int pos, bool updateposi)
{
        m_UpdatePosition = updateposi;
        if ( !updateposi ){
                m_nLocator = -1;
        }
        else
        {
                m_nLocator = pos;
        }
        update();
}
 
void TargetWaveDisplay::updateDisplay( std::shared_ptr<H2Core::InstrumentLayer> pLayer )
{
        if ( pLayer && pLayer->get_sample() ) {
 
                int nSampleLength = pLayer->get_sample()->get_frames();
                float nScaleFactor = nSampleLength / width();
 
                float fGain = (height() - 8) / 2.0 * pLayer->get_gain();
 
                auto pSampleDatal = pLayer->get_sample()->get_data_l();
                auto pSampleDatar = pLayer->get_sample()->get_data_r();
                int nSamplePos = 0;
                int nVall;
                int nValr;
                for ( int i = 0; i < width(); ++i ){
                        nVall = 0;
                        nValr = 0;
                        for ( int j = 0; j < nScaleFactor; ++j ) {
                                if ( j < nSampleLength ) {
                                        if ( pSampleDatal[ nSamplePos ] < 0 ){
                                                int newVal = static_cast<int>( pSampleDatal[ nSamplePos ] * -fGain );
                                                nVall = newVal;
                                        }else
                                        {
                                                int newVal = static_cast<int>( pSampleDatal[ nSamplePos ] * fGain );
                                                nVall = newVal;
                                        }
                                        if ( pSampleDatar[ nSamplePos ] > 0 ){
                                                int newVal = static_cast<int>( pSampleDatar[ nSamplePos ] * -fGain );
                                                nValr = newVal;
                                        }else
                                        {
                                                int newVal = static_cast<int>( pSampleDatar[ nSamplePos ] * fGain );
                                                nValr = newVal;
                                        }
                                }
                                ++nSamplePos;
                        }
                        m_pPeakData_Left[ i ] = nVall;
                        m_pPeakData_Right[ i ] = nValr;
                }
        }
 
        update();
 
}
 
void TargetWaveDisplay::updateMouseSelection(QMouseEvent *ev)
{
        auto pEv = static_cast<MouseEvent*>( ev );
 
        m_EditMode = getEnvelopeEditMode();
        const Sample::VelocityEnvelope & envelope = (m_EditMode == TargetWaveDisplay::VELOCITY) ? m_VelocityEnvelope : m_PanEnvelope;
 
        m_nX = std::min(UI_WIDTH, std::max(0, static_cast<int>(pEv->position().x())));
        m_nY = std::min(UI_HEIGHT, std::max(0, static_cast<int>(pEv->position().y())));
 
        if ( !(ev->buttons() & Qt::LeftButton) || m_nSelectedEnvelopePoint == -1) {
                QPoint mousePoint(m_nX, m_nY);
                int selection = -1;
                int min_distance = 1000000;
                for ( int i = 0; i < static_cast<int>(envelope.size()); i++){
                        if ( envelope[i].frame >= m_nX - m_nSnapRadius && envelope[i].frame <= m_nX + m_nSnapRadius ) {
                                QPoint envelopePoint(envelope[i].frame, envelope[i].value);
                                int delta = (mousePoint - envelopePoint).manhattanLength();
                                if (delta < min_distance) {
                                        min_distance = delta;
                                        selection = i;
                                }
                        }
                }
                m_nSelectedEnvelopePoint = selection;
        }
        if (m_nSelectedEnvelopePoint == -1) {
                m_sInfo = "";
        } else {
                float info = (UI_HEIGHT - envelope[m_nSelectedEnvelopePoint].value) / (float)UI_HEIGHT;
                m_sInfo.setNum( info, 'g', 2 );
        }
}
 
void TargetWaveDisplay::updateEnvelope()
{
        if ( m_nSelectedEnvelopePoint == -1 ) {
                return;
        }
        m_EditMode = getEnvelopeEditMode();
        Sample::VelocityEnvelope & envelope = (m_EditMode == TargetWaveDisplay::VELOCITY) ? m_VelocityEnvelope : m_PanEnvelope;
        envelope.erase( envelope.begin() + m_nSelectedEnvelopePoint );
        if ( m_nSelectedEnvelopePoint == 0 ){
                m_nX = 0;
        } else if ( m_nSelectedEnvelopePoint == static_cast<int>(envelope.size()) ) {
                m_nX = UI_WIDTH;
        }
        envelope.push_back(  EnvelopePoint(  m_nX, m_nY  )  );
        sort( envelope.begin(), envelope.end(), EnvelopePoint::Comparator() );
        for (int i = 0; i < envelope.size() - 1; ++i) {
                if (envelope[i].frame == envelope[i+1].frame) {
                        envelope.erase( envelope.begin() + i);
                        if (i + 1 == m_nSelectedEnvelopePoint) {
                                m_nSelectedEnvelopePoint = i;
                        }
                }
        }
}
 
void TargetWaveDisplay::mouseMoveEvent(QMouseEvent *ev)
{
        updateMouseSelection(ev);
 
        if ( ! (ev->buttons() & Qt::LeftButton) ) {
                // we are not dragging any point
                update();
                return;
        }
        updateEnvelope();
        updateMouseSelection(ev);
        update();
        HydrogenApp::get_instance()->getSampleEditor()->setUnclean();
}
 
 
 
void TargetWaveDisplay::mousePressEvent(QMouseEvent *ev)
{
        m_EditMode = getEnvelopeEditMode();
        Sample::VelocityEnvelope & envelope = (m_EditMode == TargetWaveDisplay::VELOCITY) ? m_VelocityEnvelope : m_PanEnvelope;
 
        updateMouseSelection(ev);
 
        if (ev->button() == Qt::LeftButton) {
                // add or move point
                bool NewPoint = false;
 
                if ( m_nSelectedEnvelopePoint == -1 ) {
                        NewPoint = true;
                }
 
                if (NewPoint){
                        if (envelope.empty()) {
                                envelope.push_back(  EnvelopePoint( 0, m_nY )  );
                                envelope.push_back(  EnvelopePoint( UI_WIDTH, m_nY ) );
                        } else {
                                envelope.push_back(  EnvelopePoint(  m_nX, m_nY  )  );
                        }
                        sort( envelope.begin(), envelope.end(), EnvelopePoint::Comparator() );
                } else {
                        // move old point to new position
                        updateEnvelope();
                }
        } else if (ev->button() == Qt::RightButton ) {
                //remove point
 
                if ( m_nSelectedEnvelopePoint == -1 ||
                         envelope.size() > 2 &&
                         (m_nSelectedEnvelopePoint == 0 || m_nSelectedEnvelopePoint == envelope.size() - 1) ) {
                        // do nothing if no point is selected
                        // don't remove first or last point if more than 2 points in envelope
                        update();
                        return;
                } else if (envelope.size() == 2) {
                        // if only 2 points, remove them both
                        envelope.clear();
                } else {
                        envelope.erase( envelope.begin() +  m_nSelectedEnvelopePoint );
                }
        }
 
        updateMouseSelection(ev);
        update();
        HydrogenApp::get_instance()->getSampleEditor()->setUnclean();
}
 
 
 
 
 
void TargetWaveDisplay::mouseReleaseEvent(QMouseEvent *ev)
{
        updateMouseSelection(ev);
        update();
        HydrogenApp::get_instance()->getSampleEditor()->returnAllTargetDisplayValues();
}
 
 
static TargetWaveDisplay::EnvelopeEditMode getEnvelopeEditMode()
{
        int editType = HydrogenApp::get_instance()->getSampleEditor()->EditTypeComboBox->currentIndex();
        if (editType == 0) {
                return TargetWaveDisplay::VELOCITY;
        } else if (editType == 1) {
                return TargetWaveDisplay::PAN;
        } else {
                // combo options added
                return TargetWaveDisplay::PAN;
        }
}