Ipx800Dimmer.java

/**
 * Copyright (c) 2010-2016 by the respective copyright holders.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.openhab.binding.ipx800.internal.itemslot;

import org.openhab.core.library.types.PercentType;
import org.openhab.core.types.State;
import org.openhab.core.types.Type;

/**
 * Virtual dimmer item
 * 
 * @author Seebag
 * @since 1.8.0
 *
 */
public class Ipx800Dimmer extends Ipx800Item {
    private PercentType lastState = new PercentType(0);
    private int steps = 1;

    public Ipx800Dimmer(int steps) {
        this.steps = steps;
    }

    public Ipx800Dimmer() {
    }

    public void increment(boolean propagate) {
        if (lastState == PercentType.HUNDRED) {
            lastState = PercentType.ZERO;
        } else {
            if (lastState.intValue() + steps >= 100) {
                lastState = PercentType.HUNDRED;
            } else {
                lastState = new PercentType(lastState.intValue() + steps);
            }
        }
        if (propagate) {
            this.postState();
        }
    }

    @Override
    public State getState() {
        return lastState;
    }

    @Override
    protected Type toState(String state) {
        return new PercentType(state);
    }

    @Override
    protected boolean updateStateInternal(Type state) {
        boolean changed = false;
        if (state instanceof PercentType) {
            PercentType commandState = (PercentType) state;
            if (!lastState.equals(commandState)) {
                changed = true;
                lastState = commandState;
            }
        }
        return changed;
    }
}