Method paintEvent

src/gui/PianoView.cpp:776–894

! \brief Paint the piano display view in response to an event * * This method draws the piano and the 'root note' base. It draws * the base first, then all the white keys, then all the black keys. * * \todo Is there supposed to be a parameter given here? */

 *  \todo Is there supposed to be a parameter given here?
 */
void PianoView::paintEvent( QPaintEvent * )
{
	QPainter p( this );

	// set smaller font for printing number of every octave
	p.setFont( pointSize<LABEL_TEXT_SIZE>( p.font() ) );


	// draw bar above the keyboard (there will be the labels
	// for all C's)
	p.fillRect( QRect( 0, 1, width(), PIANO_BASE-2 ), p.background() );

	// draw the line above the keyboard
	p.setPen( Qt::black );
	p.drawLine( 0, 0, width(), 0 );
	p.drawLine( 0, PIANO_BASE-1, width(), PIANO_BASE-1 );

	p.setPen( Qt::white );

	const int base_key = ( m_piano != NULL ) ?
		m_piano->instrumentTrack()->baseNoteModel()->value() : 0;

	QColor baseKeyColor = QApplication::palette().color( QPalette::Active,
							QPalette::BrightText );
	if( Piano::isWhiteKey( base_key ) )
	{
		p.fillRect( QRect( getKeyX( base_key ), 1, PW_WHITE_KEY_WIDTH-1,
							PIANO_BASE-2 ), baseKeyColor );
	}
	else
	{
		p.fillRect( QRect( getKeyX( base_key ) + 1, 1,
				PW_BLACK_KEY_WIDTH - 1, PIANO_BASE - 2 ), baseKeyColor);
	}


	int cur_key = m_startKey;

	// draw all white keys...
	for( int x = 0; x < width(); )
	{
		while( Piano::isBlackKey( cur_key ) )
		{
			++cur_key;
		}

		// draw pressed or not pressed key, depending on state of
		// current key
		if( m_piano && m_piano->isKeyPressed( cur_key ) )
		{
			p.drawPixmap( x, PIANO_BASE, *s_whiteKeyPressedPm );
		}
		else
		{
			p.drawPixmap( x, PIANO_BASE, *s_whiteKeyPm );
		}

		x += PW_WHITE_KEY_WIDTH;