C++ FxMixer::effectChannel方法代码示例

FxMixerView::FxChannelView::FxChannelView(QWidget * _parent, FxMixerView * _mv,
										  int _chIndex )
{
	m_fxLine = new FxLine(_parent, _mv, _chIndex);

	FxMixer * m = engine::fxMixer();
	m_fader = new fader( &m->effectChannel(_chIndex)->m_volumeModel,
					tr( "FX Fader %1" ).arg( _chIndex ), m_fxLine );
	m_fader->move( 16-m_fader->width()/2,
					m_fxLine->height()-
					m_fader->height()-5 );

	m_muteBtn = new pixmapButton( m_fxLine, tr( "Mute" ) );
	m_muteBtn->setModel( &m->effectChannel(_chIndex)->m_muteModel );
	m_muteBtn->setActiveGraphic(
				embed::getIconPixmap( "led_off" ) );
	m_muteBtn->setInactiveGraphic(
				embed::getIconPixmap( "led_green" ) );
	m_muteBtn->setCheckable( true );
	m_muteBtn->move( 9,  m_fader->y()-16);
	toolTip::add( m_muteBtn, tr( "Mute this FX channel" ) );
	
	// Create EffectRack for the channel
	m_rackView = new EffectRackView( &m->effectChannel(_chIndex)->m_fxChain, _mv->m_racksWidget );
	m_rackView->setFixedSize( 245, FxLine::FxLineHeight );
}

void FxLine::renameChannel()
{
	bool ok;
	FxMixer * mix = engine::fxMixer();
	QString new_name = QInputDialog::getText( this,
			FxMixerView::tr( "Rename FX channel" ),
			FxMixerView::tr( "Enter the new name for this "
						"FX channel" ),
			QLineEdit::Normal, mix->effectChannel(m_channelIndex)->m_name, &ok );
	if( ok && !new_name.isEmpty() )
	{
		mix->effectChannel( m_channelIndex )->m_name = new_name;
		update();
	}
}

void FxLine::contextMenuEvent( QContextMenuEvent * )
{
	FxMixer * mix = engine::fxMixer();
	QPointer<captionMenu> contextMenu = new captionMenu( mix->effectChannel( m_channelIndex )->m_name );
	if( m_channelIndex != 0 ) // no move-options in master 
	{
		contextMenu->addAction( tr( "Move &left" ),	this, SLOT( moveChannelLeft() ) );
		contextMenu->addAction( tr( "Move &right" ), this, SLOT( moveChannelRight() ) );
	}
	contextMenu->addAction( tr( "Rename &channel" ), this, SLOT( renameChannel() ) );
	contextMenu->addSeparator();
	
	if( m_channelIndex != 0 ) // no remove-option in master
	{
		contextMenu->addAction( embed::getIconPixmap( "cancel" ), tr( "R&emove channel" ),
							this, SLOT( removeChannel() ) );
		contextMenu->addSeparator();
	}
	
	contextMenu->addAction( embed::getIconPixmap( "help" ),
						tr( "&Help" ),
						this, SLOT( displayHelp() ) );
	contextMenu->exec( QCursor::pos() );
	delete contextMenu;
}

void FxMixerView::updateFaders()
{
	FxMixer * m = Engine::fxMixer();

	// apply master gain
	m->effectChannel(0)->m_peakLeft *= Engine::mixer()->masterGain();
	m->effectChannel(0)->m_peakRight *= Engine::mixer()->masterGain();

	for( int i = 0; i < m_fxChannelViews.size(); ++i )
	{
		const float opl = m_fxChannelViews[i]->m_fader->getPeak_L();
		const float opr = m_fxChannelViews[i]->m_fader->getPeak_R();
		const float fall_off = 1.2;
		if( m->effectChannel(i)->m_peakLeft > opl )
		{
			m_fxChannelViews[i]->m_fader->setPeak_L( m->effectChannel(i)->m_peakLeft );
			m->effectChannel(i)->m_peakLeft = 0;
		}
		else
		{
			m_fxChannelViews[i]->m_fader->setPeak_L( opl/fall_off );
		}

		if( m->effectChannel(i)->m_peakRight > opr )
		{
			m_fxChannelViews[i]->m_fader->setPeak_R( m->effectChannel(i)->m_peakRight );
			m->effectChannel(i)->m_peakRight = 0;
		}
		else
		{
			m_fxChannelViews[i]->m_fader->setPeak_R( opr/fall_off );
		}
	}
}

void FxLine::paintEvent( QPaintEvent * )
{
	FxMixer * mix = engine::fxMixer();
	bool sendToThis = mix->channelSendModel(
		m_mv->currentFxLine()->m_channelIndex, m_channelIndex) != NULL;
	QPainter painter;
	painter.begin( this );
	drawFxLine( &painter, this,
		mix->effectChannel(m_channelIndex)->m_name,
		m_mv->currentFxLine() == this, sendToThis );
	painter.end();
}