001package com.pi4j.io.gpio.event; 002 003/* 004 * #%L 005 * ********************************************************************** 006 * ORGANIZATION : Pi4J 007 * PROJECT : Pi4J :: Java Library (Core) 008 * FILENAME : GpioPinDigitalStateChangeEvent.java 009 * 010 * This file is part of the Pi4J project. More information about 011 * this project can be found here: https://www.pi4j.com/ 012 * ********************************************************************** 013 * %% 014 * Copyright (C) 2012 - 2019 Pi4J 015 * %% 016 * This program is free software: you can redistribute it and/or modify 017 * it under the terms of the GNU Lesser General Public License as 018 * published by the Free Software Foundation, either version 3 of the 019 * License, or (at your option) any later version. 020 * 021 * This program is distributed in the hope that it will be useful, 022 * but WITHOUT ANY WARRANTY; without even the implied warranty of 023 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 024 * GNU General Lesser Public License for more details. 025 * 026 * You should have received a copy of the GNU General Lesser Public 027 * License along with this program. If not, see 028 * <http://www.gnu.org/licenses/lgpl-3.0.html>. 029 * #L% 030 */ 031 032 033import com.pi4j.io.gpio.GpioPin; 034import com.pi4j.io.gpio.PinEdge; 035import com.pi4j.io.gpio.PinState; 036 037/** 038 * GPIO digital state pin value change event. 039 * 040 * @author Robert Savage (<a 041 * href="http://www.savagehomeautomation.com">http://www.savagehomeautomation.com</a>) 042 */ 043public class GpioPinDigitalStateChangeEvent extends GpioPinEvent { 044 045 static final long serialVersionUID = 1L; 046 private final PinState state; 047 private final PinEdge edge; 048 049 /** 050 * Default event constructor 051 * 052 * @param obj Ignore this parameter 053 * @param pin GPIO pin number (not header pin number; not wiringPi pin number) 054 * @param state New GPIO pin state. 055 */ 056 public GpioPinDigitalStateChangeEvent(Object obj, GpioPin pin, PinState state) { 057 super(obj, pin, PinEventType.DIGITAL_STATE_CHANGE); 058 this.state = state; 059 060 // set pin edge caused by the state change 061 this.edge = (state == PinState.HIGH) ? PinEdge.RISING : PinEdge.FALLING; 062 } 063 064 /** 065 * Get the new pin state raised in this event. 066 * 067 * @return GPIO pin state (HIGH, LOW) 068 */ 069 public PinState getState() { 070 return state; 071 } 072 073 /** 074 * Get the pin edge for the state change caused by this event. 075 * 076 * @return 077 */ 078 public PinEdge getEdge() { 079 return this.edge; 080 } 081}