/**
 * NoteChoice.java
 *
 * This is a user interface for selecting notes. It presents choices for the (human)
 * concepts of letter-name and octave but has methods to set and get this in terms
 * of the (MIDI) concept of a note number.
 *
 * The two choice-boxes can be layed out vertically or horizontally in the constructor.
 *
 * Andy Murray 18/12/02
 *
 */
import java.awt.*;

public class NoteChoice extends Panel
{
	static final int LAYOUT_HORIZ=0;
	static final int LAYOUT_VERT=1;

	private Label lblNote, lblOct;
	private Choice chNote, chOct;

	NoteChoice(int LAYOUT)
	{
		lblNote=new Label("Note:", Label.RIGHT);
		lblOct=new Label("Oct:", Label.RIGHT);

		chNote=new Choice();
		chNote.add("B");
		chNote.add("A#");
		chNote.add("A");
		chNote.add("G#");
		chNote.add("G");
		chNote.add("F#");
		chNote.add("F");
		chNote.add("E");
		chNote.add("D#");
		chNote.add("D");
		chNote.add("C#");
		chNote.add("C");
		chNote.select("C");

		chOct=new Choice();
		chOct.add("+3");//96
		chOct.add("+2");//84
		chOct.add("+1");//72
		chOct.add("0");//60
		chOct.add("-1");//48
		chOct.add("-2");//36
		chOct.add("-3");//24
		chOct.select("0");

		switch(LAYOUT)
		{
			case LAYOUT_HORIZ:
				this.setLayout(new GridLayout(1,4));
				break;
			case LAYOUT_VERT:
				this.setLayout(new GridLayout(2,2));
		}
		this.add(lblNote);
		this.add(chNote);
		this.add(lblOct);
		this.add(chOct);
		this.setBackground(Color.lightGray);
	}

	public int getNoteNum()
	{
		int noteVal=11-chNote.getSelectedIndex();
		int octVal=(3-chOct.getSelectedIndex()+5)*12;
		return noteVal+octVal;
	}

	public void setNoteNum(int val)
	{
		if ( (val>23)&&(val<108) )
		{
			int octIndex = 6-((val/12)-2);
			chOct.select(octIndex);
			int letterIndex = 11-(val % 12);
			chNote.select(letterIndex);
		}
	}
}