package edu.jsu.leathrum.mathlets.shared;
import java.text.ParsePosition;

public class DoubleInputSet extends InputSet implements FieldHandler {

  public DoubleInputSet(String namestr, int size) {
    super(namestr, size);
  }

  private double val = 0.0;

  public double getValue() {
    Number n = AMathlet.getNumberFormat().parse(getInput(), new ParsePosition(0));
    if ((n == null) || (getInput().length() == 0)) val = Double.NaN;
    else val = n.doubleValue();
    return val;
  }

  public void setValue(double x) {
    val = x;
    if (Double.isNaN(val) || Double.isInfinite(val))
	  super.setInputText("");
    else super.setInputText(AMathlet.getNumberFormat().format(val));
    this.repaint();
    super.select(0,0);
  }
  
  private double  def = 0.0;

  // need to override InputSet's versions of these to allow Locale data
  public void setDefault(String dval) {
    def = AMathlet.getNumberFormat().parse(dval, new ParsePosition(0)).doubleValue();
  }

  // this isn't part of the interface, but it seemed like a good idea here
  public void setDefault(double dval) {
    def = dval;
  }

  public void setToDefault() {
    setValue(def);
  }

  public void setField(String val) {
    setValue(AMathlet.getNumberFormat().parse(val, new ParsePosition(0)).doubleValue());
  }

  public String getField() {
    return AMathlet.getNumberFormat().format(val);
  }
}