MainSampleWaveDisplay.cpp

Go to the documentation of this file.

/*
 * 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 "MainSampleWaveDisplay.h"
 
#include <core/Basics/Sample.h>
#include <core/Basics/Song.h>
#include <core/Basics/Instrument.h>
#include "../Compatibility/MouseEvent.h"
#include "HydrogenApp.h"
#include "SampleEditor.h"
using namespace H2Core;
 
#include "../Skin.h"
 
MainSampleWaveDisplay::MainSampleWaveDisplay(QWidget* pParent)
 : QWidget( pParent )
 {
//      setAttribute(Qt::WA_OpaquePaintEvent);
 
        //
        int w = 624;
        int h = 265;
        resize( w, h );
 
        bool ok = m_background.load( Skin::getImagePath() + "/waveDisplay/mainsamplewavedisplay.png" );
        if( ok == false ){
                ERRORLOG( "Error loading pixmap" );
        }
 
        m_pPeakDatal = new int[ w ];
        m_pPeakDatar = new int[ w ];
 
        m_nStartFramePosition = 25;
        m_nLoopFramePosition = 25;
        m_nEndFramePosition = width() -25;
        m_nLocator = -1;
        m_bUpdatePosition = false;
        m_nSampleLength = 0;
 
        m_bStartSliderIsMoved = false;
        m_bLoopSliderIsMoved = false;
        m_bEndSliderIsmoved = false;
 
        m_SelectedSlider = NONE;
        setMouseTracking(true);
}
 
 
 
 
MainSampleWaveDisplay::~MainSampleWaveDisplay()
{
        //INFOLOG( "DESTROY" );
 
        delete[] m_pPeakDatal;
        delete[] m_pPeakDatar;
}
 
void MainSampleWaveDisplay::paintLocatorEvent( int pos, bool updateposi)
{
        m_bUpdatePosition = updateposi;
        if ( !updateposi ){
                m_nLocator = -1;
        }else
        {
                m_nLocator = pos;
        }
        update();
}
 
static void set_paint_color(QPainter & painter, const QColor & color, bool selected, MainSampleWaveDisplay::Slider which)
{
        if (!selected) {
                painter.setPen( color );
        } else {
                QColor highlight = QColor(std::min(255, color.red() + 20 + 20 * (which == MainSampleWaveDisplay::END)),
                                std::min(255, color.green() + 20 + 20 * (which == MainSampleWaveDisplay::START)),
                                std::min(255, color.blue() + 20 + 20 * (which == MainSampleWaveDisplay::LOOP)));
 
                painter.setPen ( highlight );
        }
}
 
void MainSampleWaveDisplay::paintEvent(QPaintEvent *ev)
{
        QPainter painter( this );
        painter.setRenderHint( QPainter::Antialiasing );
 
        bool issmaller = false;
 
        painter.drawPixmap( ev->rect(), m_background, ev->rect() );
        painter.setPen( QColor( 230, 230, 230 ) );
        int VCenterl = height() / 4;
        int VCenterr = height() / 4 + height() / 2;
 
        if ( width() >= m_nSampleLength  ) issmaller = true;
 
        for ( int x = 25; x < width() -25; x++ ) {
                if ( !issmaller || x <= m_nSampleLength){
                        painter.drawLine( x, -m_pPeakDatal[x -25] +VCenterl, x, -m_pPeakDatal[x -24] +VCenterl  );
                        painter.drawLine( x, -m_pPeakDatar[x -25] +VCenterr, x, -m_pPeakDatar[x -24] +VCenterr  );      
                }else
                {
                        painter.drawLine( x, 0 +VCenterl, x, 0 +VCenterl  );
                        painter.drawLine( x, 0 +VCenterr, x, 0 +VCenterr  );
                }
        
        }
 
 
        painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
 
        painter.setPen( QPen( QColor( 255, 255, 255 ), 1, Qt::DotLine ) );
        painter.drawLine( 23, 4, 23, height() -4 );
        painter.drawLine( width() -23, 4,width() -23, height() -4 );
        painter.setPen( QPen( QColor( 255, 255, 255 ), 1, Qt::SolidLine ) );
        painter.drawLine( m_nLocator, 4, m_nLocator, height() -4);
        painter.drawLine( 0, VCenterl, width(),VCenterl );
        painter.drawLine( 0, VCenterr, width(),VCenterr );
 
        QFont font;
 
        QColor startColor = QColor( 32, 173, 0, 200 );
        QColor endColor = QColor( 217, 68, 0, 200 );
        QColor loopColor =  QColor( 93, 170, 254, 200 );
        font.setWeight( QFont::Bold );
        painter.setFont( font );
//start frame pointer
        set_paint_color(painter, startColor, m_SelectedSlider == START, m_SelectedSlider);
        painter.drawLine( m_nStartFramePosition, 4, m_nStartFramePosition, height() -4 );     
        painter.drawText( m_nStartFramePosition -10, 250, 10,20, Qt::AlignRight, "S" );
//endframe pointer
        set_paint_color(painter, endColor, m_SelectedSlider == END, m_SelectedSlider);
        painter.drawLine( m_nEndFramePosition, 4, m_nEndFramePosition, height() -4 );
        painter.drawText( m_nEndFramePosition -10, 123, 10, 20, Qt::AlignRight, "E" );
//loopframe pointer
        set_paint_color(painter, loopColor, m_SelectedSlider == LOOP, m_SelectedSlider);
        painter.drawLine( m_nLoopFramePosition, 4, m_nLoopFramePosition, height() -4 );
        painter.drawText( m_nLoopFramePosition , 0, 10, 20, Qt::AlignLeft, "L" );
 
 
}
 
 
 
void MainSampleWaveDisplay::updateDisplayPointer()
{
        update();
}
 
 
 
void MainSampleWaveDisplay::updateDisplay( const QString& filename )
{
 
        auto pNewSample = Sample::load( filename );
        
        if ( pNewSample ) {
 
                int nSampleLength = pNewSample->get_frames();
                m_nSampleLength = nSampleLength;
                float nScaleFactor = nSampleLength / (width() -50);
                if ( nScaleFactor < 1 ){
                        nScaleFactor = 1;
                }
 
                float fGain = height() / 4.0 * 1.0;
 
                auto pSampleDatal = pNewSample->get_data_l();
                auto pSampleDatar = pNewSample->get_data_r();
 
                unsigned nSamplePos = 0;
                int nVall = 0;
                int nValr = 0;
                int newVall = 0;
                int newValr = 0;
                for ( int i = 0; i < width(); ++i ){
                        for ( int j = 0; j < nScaleFactor; ++j ) {
                                if ( j < nSampleLength && nSamplePos < nSampleLength) {
                                        if ( pSampleDatal[ nSamplePos ] && pSampleDatar[ nSamplePos ] ){
                                                newVall = static_cast<int>( pSampleDatal[ nSamplePos ] * fGain );
                                                newValr = static_cast<int>( pSampleDatar[ nSamplePos ] * fGain );
                                                nVall = newVall;
                                                nValr = newValr;
                                        }else
                                        {
                                                nVall = 0;      
                                                nValr = 0;
                                        }
                                }
                                ++nSamplePos;
                        }
                        m_pPeakDatal[ i ] = nVall;
                        m_pPeakDatar[ i ] = nValr;
                }
        }
        update();
 
}
void MainSampleWaveDisplay::mouseUpdateDone() {
        HydrogenApp::get_instance()->getSampleEditor()->returnAllMainWaveDisplayValues();
        m_bStartSliderIsMoved = false;
        m_bLoopSliderIsMoved = false;
        m_bEndSliderIsmoved = false;
}
 
 
void MainSampleWaveDisplay::mouseMoveEvent(QMouseEvent *ev)
{
        if (ev->buttons() & Qt::LeftButton) {
                testPosition( ev );
        } else {
                chooseSlider( ev );
        }
        update();
        mouseUpdateDone();
}
 
void MainSampleWaveDisplay::mousePressEvent(QMouseEvent *ev)
{
        chooseSlider( ev );
        testPosition( ev );
        update();
        mouseUpdateDone();
}
 
void MainSampleWaveDisplay::testPosition( QMouseEvent *ev )
{
        assert(ev);
 
        auto pEv = static_cast<MouseEvent*>( ev );
 
//startframepointer
        int x = std::min(width() - 25,
                                         std::max(25, static_cast<int>(pEv->position().x())));
 
        if  ( m_SelectedSlider == START ) {
                m_nStartFramePosition = x;
                m_bStartSliderIsMoved = true;
                if ( m_nStartFramePosition > m_nLoopFramePosition ){
                        m_nLoopFramePosition = m_nStartFramePosition;
                        m_bLoopSliderIsMoved = true;
                }
                if ( m_nStartFramePosition > m_nEndFramePosition ){
                        m_nEndFramePosition = m_nStartFramePosition;
                        m_bEndSliderIsmoved = true;
                }
        }
 
//loopframeposition
        else if  ( m_SelectedSlider == LOOP ) {
                if (x >= m_nStartFramePosition && x <= m_nEndFramePosition ) {
                        m_nLoopFramePosition = x ;
                        m_bLoopSliderIsMoved = true;
                }
        }
//endframeposition
        else if  ( m_SelectedSlider == END) {
                if (x >= m_nStartFramePosition) {
                        m_nEndFramePosition = x ;
                        m_bEndSliderIsmoved = true;
                }
                if ( m_nEndFramePosition <  m_nLoopFramePosition ){
                        m_nLoopFramePosition = m_nEndFramePosition;
                        m_bLoopSliderIsMoved = true;
                }
        }
}
 
 
void MainSampleWaveDisplay::mouseReleaseEvent(QMouseEvent *ev)
{
        m_SelectedSlider = NONE;
        update();
        mouseUpdateDone();
}
 
 
 
 
void MainSampleWaveDisplay::chooseSlider(QMouseEvent * ev)
{
        assert(ev);
 
        auto pEv = static_cast<MouseEvent*>( ev );
 
        QPoint start = QPoint(m_nStartFramePosition, height());
        QPoint end = QPoint(m_nEndFramePosition, height() / 2);
        QPoint loop = QPoint(m_nLoopFramePosition, 0);
 
        int ds = (pEv->position() - start).manhattanLength();
        int de = (pEv->position() - end).manhattanLength();
        int dl = (pEv->position() - loop).manhattanLength();
        m_SelectedSlider = NONE;
 
        if (ds <= de && ds <= dl) {
                m_SelectedSlider = START;
        } else if (de < ds && de <= dl) {
                m_SelectedSlider = END;
        } else if (dl < ds && dl < de) {
                m_SelectedSlider = LOOP;
        }
}