/* Copyright (c) 2010, Carl Burch. License information is located in the
* com.cburch.logisim.Main source code and at www.cburch.com/logisim/. */
package com.cburch.logisim.prefs;
import java.util.prefs.PreferenceChangeEvent;
import java.util.prefs.Preferences;
class PrefMonitorDouble extends AbstractPrefMonitor<Double> {
private double dflt;
private double value;
PrefMonitorDouble(String name, double dflt) {
super(name);
this.dflt = dflt;
this.value = dflt;
Preferences prefs = AppPreferences.getPrefs();
set(Double.valueOf(prefs.getDouble(name, dflt)));
prefs.addPreferenceChangeListener(this);
}
public Double get() {
return Double.valueOf(value);
}
public void set(Double newValue) {
double newVal = newValue.doubleValue();
if (value != newVal) {
AppPreferences.getPrefs().putDouble(getIdentifier(), newVal);
}
}
public void preferenceChange(PreferenceChangeEvent event) {
Preferences prefs = event.getNode();
String prop = event.getKey();
String name = getIdentifier();
if (prop.equals(name)) {
double oldValue = value;
double newValue = prefs.getDouble(name, dflt);
if (newValue != oldValue) {
value = newValue;
AppPreferences.firePropertyChange(name,
Double.valueOf(oldValue), Double.valueOf(newValue));
}
}
}
}