MidiSenseWidget.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 "core/MidiMap.h"
#include "MidiSenseWidget.h"
#include "../HydrogenApp.h"
#include "../CommonStrings.h"
 
#include <core/Hydrogen.h>
#include <core/EventQueue.h>
 
MidiSenseWidget::MidiSenseWidget(QWidget* pParent, bool bDirectWrite, std::shared_ptr<Action> pAction)
        : QDialog( pParent )
        , m_lastMidiEvent( H2Core::MidiMessage::Event::Null )
        , m_nLastMidiEventParameter( 0 )
{
        auto pCommonStrings = HydrogenApp::get_instance()->getCommonStrings();
        m_bDirectWrite = bDirectWrite;
        m_pAction = pAction;
 
        setWindowTitle( pCommonStrings->getMidiSenseWindowTitle() );
        setFixedSize( 280, 100 );
 
        bool midiOperable = false;
        
        m_pURLLabel = new QLabel( this );
        m_pURLLabel->setAlignment( Qt::AlignCenter );
 
        if(m_pAction != nullptr){
                m_pURLLabel->setText( pCommonStrings->getMidiSenseInput() );
                midiOperable = true;
        } else {
 
                /*
                 *   Check if this widget got called from the midiTable in the preferences
                 *   window(directWrite=false) or by clicking on a midiLearn-capable gui item(directWrite=true)
                 */
 
                if(m_bDirectWrite){
                        m_pURLLabel->setText( pCommonStrings->getMidiSenseUnavailable() );
                        midiOperable = false;
                } else {
                        m_pURLLabel->setText( pCommonStrings->getMidiSenseInput() );
                        midiOperable = true;
                }
        }
        
        QVBoxLayout* pVBox = new QVBoxLayout( this );
        pVBox->addWidget( m_pURLLabel );
        setLayout( pVBox );
        
        H2Core::Hydrogen *pHydrogen = H2Core::Hydrogen::get_instance();
        pHydrogen->setLastMidiEvent( H2Core::MidiMessage::Event::Null );
        pHydrogen->setLastMidiEventParameter( 0 );
        
        m_pUpdateTimer = new QTimer( this );
 
        if(midiOperable)
        {
                /*
                 * If the widget is not midi operable, we can omit
                 * starting the timer which listens to midi input..
                 */
 
                connect( m_pUpdateTimer, SIGNAL( timeout() ), this, SLOT( updateMidi() ) );
                m_pUpdateTimer->start( 100 );
        }
};
 
MidiSenseWidget::~MidiSenseWidget(){
        m_pUpdateTimer->stop();
}
 
void MidiSenseWidget::updateMidi(){
        H2Core::Hydrogen *pHydrogen = H2Core::Hydrogen::get_instance();
        if ( pHydrogen->getLastMidiEvent() != H2Core::MidiMessage::Event::Null ){
 
                m_lastMidiEvent = pHydrogen->getLastMidiEvent();
                m_nLastMidiEventParameter = pHydrogen->getLastMidiEventParameter();
 
                if ( m_bDirectWrite ) {
                        // write the action / parameter combination to the midiMap
                        MidiMap *pMidiMap = MidiMap::get_instance();
 
                        assert(m_pAction);
 
                        std::shared_ptr<Action> pAction = std::make_shared<Action>( m_pAction );
                        pAction->setValue( "0" );
 
                        switch( m_lastMidiEvent ) {
                        case H2Core::MidiMessage::Event::CC: 
                                pMidiMap->registerCCEvent( m_nLastMidiEventParameter, pAction );
                                break;
 
                        case H2Core::MidiMessage::Event::Note:
                                pMidiMap->registerNoteEvent( m_nLastMidiEventParameter, pAction );
                                break;
 
                        case H2Core::MidiMessage::Event::PC:
                                pMidiMap->registerPCEvent( pAction );
                                break;
 
                        case H2Core::MidiMessage::Event::Null:
                                return;
 
                        default:
                                // MMC event
                                pMidiMap->registerMMCEvent(
                                        H2Core::MidiMessage::EventToQString( m_lastMidiEvent ),
                                        pAction );
                        }
 
                        H2Core::EventQueue::get_instance()->push_event( H2Core::EVENT_MIDI_MAP_CHANGED, 0 );
                }
 
                close();
        }
}