llvm-gcc-4.2/libjava/classpath/javax/sound/sampled/BooleanControl.java

/* 
   Copyright (C) 2005 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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02110-1301 USA.

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making a combined work based on this library.  Thus, the terms and
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permission to link this library with independent modules to produce an
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package javax.sound.sampled;

/**
 * A BooleanControl is a Control which has two states.
 * @since 1.3
 */
public abstract class BooleanControl extends Control
{
  /**
   * A Type specialized to represent a boolean control.
   * @since 1.3
   */
  public static class Type extends Control.Type
  {
    // FIXME: correct constructions?

    /**
     * A control for applying reverb.
     */
    public final static Type APPLY_REVERB = new Type("Apply reverb");

    /**
     * A control for muting.
     */
    public final static Type MUTE = new Type("Mute");

    /**
     * Create a new Type given its name.
     * @param name the name of the type
     */
    protected Type(String name)
    {
      super(name);
    }
  }

  private Type type;
  private boolean value;
  private String trueLabel;
  private String falseLabel;

  /**
   * Create a new boolean control, with the indicated Type and initial
   * value.  The description strings will default to "true" and "false".
   * @param type the type
   * @param init the initial value
   */
  protected BooleanControl(Type type, boolean init)
  {
    super(type);
    this.value = init;
    this.trueLabel = "true";
    this.falseLabel = "false";
  }

  /**
   * Create a new boolean control, with the indicated Type, initial
   * value, and labels.
   * @param type the type
   * @param init the initial value
   * @param trueLabel the label for the true state
   * @param falseLabel the label for the false state
   */
  protected BooleanControl(Type type, boolean init, String trueLabel,
			   String falseLabel)
  {
    super(type);
    this.value = init;
    this.trueLabel = trueLabel;
    this.falseLabel = falseLabel;
  }

  /**
   * Return the label corresponding to the indicated state.
   * @param state the state
   * @return the true label or the false label, as appropriate
   */
  public String getStateLabel(boolean state)
  {
    return state ? trueLabel : falseLabel;
  }

  /**
   * Return the current value of thhe control.
   */
  public boolean getValue()
  {
    return value;
  }

  /**
   * Set the value of the control as indicated.
   * @param value the new value
   */
  public void setValue(boolean value)
  {
    this.value = value;
  }

  /**
   * Return a string describing this control.
   */
  public String toString()
  {
    return super.toString() + ": " + getStateLabel(value);
  }
}