LED.cpp

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/*
 * Hydrogen
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
 
#include "LED.h"
#include "../Skin.h"
 
#include "../HydrogenApp.h"
#include <core/Globals.h>
#include <core/Preferences/Preferences.h>
#include <core/AudioEngine/AudioEngine.h>
#include <core/AudioEngine/TransportPosition.h>
 
LED::LED( QWidget *pParent, QSize size )
 : QWidget( pParent )
 , m_bActivated( false )
{
        setAttribute( Qt::WA_OpaquePaintEvent );
        setFixedSize( size );
 
        // Since the load function does not report success, we will check
        // for the existence of the background image separately.
        QString sPath;
        float fAspectRatio = static_cast<float>( size.width() ) / static_cast<float>( size.height() );
        if ( fAspectRatio < 1 ) {
                sPath = QString( Skin::getSvgImagePath() + "/led_5_13.svg" );
        } else {
                sPath = QString( Skin::getSvgImagePath() + "/led_11_9.svg" );
        }
 
        QFile file( sPath );
        if ( file.exists() ) {
                m_background = new QSvgRenderer( sPath, this );
        } else {
                m_background = nullptr;
                ERRORLOG( QString( "Unable to load background image [%1]" ).arg( sPath ) );
        }
 
        resize( size );
}
 
LED::~LED() {
}
 
void LED::setActivated( bool bActivated ) {
        m_bActivated = bActivated;
        update();
}
 
void LED::paintEvent( QPaintEvent* ev )
{
        QPainter painter( this );
 
        if ( m_background != nullptr ) {
 
                if ( m_bActivated ) {
                        m_background->render( &painter, "layer2" );
                } else {
                        m_background->render( &painter, "layer1" );
                }
        }
}

 
MetronomeLED::MetronomeLED( QWidget *pParent, QSize size )
        : LED( pParent, size )
        , m_bFirstBar( false )
        , m_activityTimeout( 250 )
{
        HydrogenApp::get_instance()->addEventListener( this );
        
        // Since the load function does not report success, we will check
        // for the existence of the background image separately.
        QString sPath( Skin::getSvgImagePath() + "/led_22_7.svg" );
        QFile file( sPath );
        if ( file.exists() ) {
                m_background = new QSvgRenderer( sPath, this );
        } else {
                m_background = nullptr;
                ERRORLOG( QString( "Unable to load background image [%1]" ).arg( sPath ) );
        }
 
        m_pTimer = new QTimer( this );
        connect( m_pTimer, SIGNAL( timeout() ), this, SLOT( turnOff() ) );
 
        resize( size );
}
 
MetronomeLED::~MetronomeLED() {
}
 
void MetronomeLED::metronomeEvent( int nValue ) {
 
        // Only trigger LED if the metronome button was pressed or it was
        // activated via MIDI or OSC.
        if ( ! H2Core::Preferences::get_instance()->m_bUseMetronome ) {
                return;
        }
        
        m_bActivated = true;
        m_bFirstBar = nValue == 0;
        
        update();
 
        m_pTimer->start( std::chrono::duration_cast<std::chrono::milliseconds>( m_activityTimeout ).count() );
}
 
void MetronomeLED::turnOff() {
        m_pTimer->stop();
        m_bActivated = false;
        update();
}
 
void MetronomeLED::paintEvent( QPaintEvent* ev )
{
        QPainter painter( this );
 
        if ( m_background != nullptr ) {
 
                if ( m_bActivated ) {
                        if ( m_bFirstBar ) {
                                m_background->render( &painter, "layer3" );
                        } else {
                                m_background->render( &painter, "layer2" );
                        }
                } else {
                        m_background->render( &painter, "layer1" );
                }
        }
}