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

public class DblButtonSet extends AButtonSet {
  double val = 0.0;
  double inc = 0.1;
  double def = 0.0;
  double min = -10000.0;
  double max = 10000.0;
  boolean cycling = false;
  DecimalFormat nf;
  ActionWrapper act = new NullAction();

  public void setValue(double newValue) {
    if (nf == null) {
      nf = (DecimalFormat) AMathlet.getNumberFormat().clone();
      nf.setMinimumFractionDigits(1);
      nf.setMaximumFractionDigits(1);
    }
    if ((newValue > min - 1) && (newValue < max + 1)) {
      val = newValue;
      setValueString(nf.format(newValue));
    }
  }

  public void setDigits(int numdigits) {
    if (nf == null) nf = (DecimalFormat) AMathlet.getNumberFormat().clone();
    nf.setMinimumFractionDigits(numdigits);
    nf.setMaximumFractionDigits(numdigits);
  }

  public double getValue() {
    return val;
  }

  public void setRange(double newmin, double newmax) {
    min = newmin;
    max = newmax;
    val = 0.0;
    def = 0.0;
  }

  public void setIncrement(double newinc) {
    inc = newinc;
  }

  public void setButtonAction(ActionWrapper newact) {
    act = newact;
  }

  public void setCycling(boolean newcyc) {
   cycling = newcyc;
  }

  public void setDefault(double newdef) {
    def = newdef;
  } // not overriding, but use this instead of AButtonSet version

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

  // do *not* need to override AButtonSet.getField()
  public void setField(String s) {
    if (nf == null) {
      nf = (DecimalFormat) AMathlet.getNumberFormat().clone();
      nf.setMinimumFractionDigits(1);
      nf.setMaximumFractionDigits(1);
    }
    Number n = nf.parse(s, new ParsePosition(0));
    if ((n == null) || (s.length() == 0)) {
      val = 00;
      setValueString("");
    }
    else setValue(n.doubleValue());
  } // overrides

  protected void plusAction() {
    if (val+inc<max) {
      setValue(val+inc);
      act.doThis();
    }
    else if (cycling) {
      setValue(min);
      act.doThis();
    }
  }

  protected void minusAction() {
    if (val-inc>min) {
      setValue(val-inc);
      act.doThis();
    }
    else if (cycling) {
      setValue(max);
      act.doThis();
    }
  }
}