C++ Hydrogen::sequencer_play方法代码示例

void PlaylistDialog::nodePlayBTN( Button* ref )
{
	Hydrogen *pEngine = Hydrogen::get_instance();
	HydrogenApp *pH2App = HydrogenApp::get_instance();

	if (ref->isPressed()) {
		QTreeWidgetItem* m_pPlaylistItem = m_pPlaylistTree->currentItem();
		if ( m_pPlaylistItem == NULL ){
			QMessageBox::information ( this, "Hydrogen", trUtf8 ( "No valid song selected!" ) );
			m_pPlayBtn->setPressed(false);
			return;
		}
		QString selected = "";
		selected = m_pPlaylistItem->text ( 0 );

		if( selected == pEngine->getSong()->get_filename()){
			pEngine->sequencer_play();
			return;
		}

		if ( pEngine->getState() == STATE_PLAYING ){
			pEngine->sequencer_stop();
		}

		Song *pSong = Song::load ( selected );
		if ( pSong == NULL ){
			QMessageBox::information ( this, "Hydrogen", trUtf8 ( "Error loading song." ) );
			m_pPlayBtn->setPressed(false);
			return;
		}

		QTreeWidget* m_pPlaylist = m_pPlaylistTree;
		int index = m_pPlaylist->indexOfTopLevelItem ( m_pPlaylistItem );
		Playlist::get_instance()->setActiveSongNumber( index );

		pH2App->setSong ( pSong );
		pEngine->setSelectedPatternNumber ( 0 );

		pEngine->sequencer_play();
	}else
	{
		pEngine->sequencer_stop();
		pH2App->setStatusBarMessage(trUtf8("Pause."), 5000);
	}
}

/**
 * The handleAction method is the heard of the MidiActionManager class.
 * It executes the operations that are needed to carry the desired action.
 */
bool MidiActionManager::handleAction( MidiAction * pAction ){

	Hydrogen *pEngine = Hydrogen::get_instance();

	/*
		return false if action is null
		(for example if no Action exists for an event)
	*/
	if( pAction == NULL )	return false;

	QString sActionString = pAction->getType();


	if( sActionString == "PLAY" )
	{
		int nState = pEngine->getState();
		if ( nState == STATE_READY ){
			pEngine->sequencer_play();
		}
		return true;
	}

	if( sActionString == "PLAY/STOP_TOGGLE" || sActionString == "PLAY/PAUSE_TOGGLE" )
	{
		int nState = pEngine->getState();
		switch ( nState )
		{
		case STATE_READY:
			pEngine->sequencer_play();
			break;

		case STATE_PLAYING:
			if( sActionString == "PLAY/STOP_TOGGLE" ) pEngine->setPatternPos( 0 );
			pEngine->sequencer_stop();
			pEngine->setTimelineBpm();
			break;

		default:
			ERRORLOG( "[Hydrogen::ActionManager(PLAY): Unhandled case" );
		}

		return true;
	}

	if( sActionString == "PAUSE" )
	{
		pEngine->sequencer_stop();
		return true;
	}

	if( sActionString == "STOP" )
	{
		pEngine->sequencer_stop();
		pEngine->setPatternPos( 0 );
		pEngine->setTimelineBpm();
		return true;
	}

	if( sActionString == "MUTE" ){
		//mutes the master, not a single strip
		pEngine->getSong()->__is_muted = true;
		return true;
	}

	if( sActionString == "UNMUTE" ){
		pEngine->getSong()->__is_muted = false;
		return true;
	}

	if( sActionString == "MUTE_TOGGLE" ){
		pEngine->getSong()->__is_muted = !Hydrogen::get_instance()->getSong()->__is_muted;
		return true;
	}

	if( sActionString == "BEATCOUNTER" ){
		pEngine->handleBeatCounter();
		return true;
	}

	if( sActionString == "TAP_TEMPO" ){
		pEngine->onTapTempoAccelEvent();
		return true;
	}

	if( sActionString == "SELECT_NEXT_PATTERN" ){
		bool ok;
		int row = pAction->getParameter1().toInt(&ok,10);
		if( row> pEngine->getSong()->get_pattern_list()->size() -1 )
			return false;
		if(Preferences::get_instance()->patternModePlaysSelected())
			pEngine->setSelectedPatternNumber( row );
		else
			pEngine->sequencer_setNextPattern( row, false, true );
		return true;
	}

//.........这里部分代码省略.........