1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * ident "%Z%%M% %I% %E% SMI" 24 * 25 * Copyright (c) 1999-2000 by Sun Microsystems, Inc. 26 * All rights reserved. 27 */ 28 29 import sunsoft.jws.visual.rt.shadow.java.awt.*; 30 import java.awt.*; 31 32 /** 33 * This creates a text field for storing integers that implements the 34 * DCListener interface so that it can be notified to 35 * increment/decrement its value. 36 */ 37 public class DCTextField extends TextField implements DCListener { 38 39 private int value; 40 41 private int bigIncrementValue = 1; 42 43 /** 44 * Constructor for DCTextField. 45 * @param text the text to initialize the text field with 46 * @param columns the width of the text field in number of columns 47 */ 48 public DCTextField(String text, int columns) { 49 super(columns); 50 setValueFromText(text); 51 } 52 53 /** 54 * Sets the value of the big increment for this text field. 55 */ 56 public void setBigIncrement(int value) { 57 bigIncrementValue = value; 58 } 59 60 /** 61 * Method from interface DCListener. 62 */ 63 public void increment() { 64 increment(1); 65 } 66 67 /** 68 * Method from interface DCListener. 69 */ 70 public void decrement() { 71 increment(-1); 72 } 73 74 /** 75 * Method from interface DCListener. 76 */ 77 public void bigIncrement() { 78 increment(bigIncrementValue); 79 } 80 81 /** 82 * Method from interface DCListener. 83 */ 84 public void bigDecrement() { 85 increment(-1*bigIncrementValue); 86 } 87 88 /** 89 * Increments the value of the textfield. It does not increment it 90 * if this will lead to an invalid value. 91 * @param value how much to increment by. It can be negative if one 92 * desires to decrement. 93 */ 94 protected void increment(int value) { 95 setValue(getValue() + value); 96 } 97 98 /** 99 * The current integer value associated with this text field. 100 * @return the int value. 101 */ 102 public int getValue() { 103 return value; 104 } 105 106 /** 107 * Sets the current integer value associated with this text 108 * field. The text field will display this value. If the value is not 109 * valid then the old value will remain in effect. 110 */ 111 public void setValue(int newValue) { 112 if (checkValue(newValue)) { 113 value = newValue; 114 setText(Integer.toString(newValue)); 115 } 116 } 117 118 /** 119 * Sets the value for this text field from the given text. 120 * @param text the text that this text field shoudl contain. 121 * @exception NumberFormatException Thrown when the supplied text 122 * cannot be parsed in to an interger value. 123 */ 124 public void setValueFromText(String text) throws NumberFormatException { 125 Integer i = Integer.valueOf(text); 126 setValue(i.intValue()); 127 } 128 129 /** 130 * Checks to see if the given value 131 * would be valid for this text 132 * field. Classes deriving form this class should override this to 133 * provide whatever checks they desire. 134 * @param newValue 135 * @return true if it will be valid, 136 * false otherwise. This class 137 * returns true always for all integer values. 138 */ 139 public boolean checkValue(int newValue) { 140 return true; 141 } 142 143 } 144