question: @ Override public void paintComponent ( Graphics g ) { super . paintComponent ( g ) ; Graphics2D graphics = ( Graphics2D ) g ; graphics . setBackground ( mColorSpectrumBackground ) ; RenderingHints renderHints = new RenderingHints ( RenderingHints . KEY_ANTIALIASING , RenderingHints . VALUE_ANTIALIAS_ON ) ; renderHints . put ( RenderingHints . KEY_RENDERING , RenderingHints . VALUE_RENDER_QUALITY ) ; graphics . setRenderingHints ( renderHints ) ; drawFrequencies ( graphics ) ; drawCursor ( graphics ) ; }
target:  Renders the channel configs, lines, labels, and cursor