1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * ident "%Z%%M% %I% %E% SMI" 24*0Sstevel@tonic-gate * 25*0Sstevel@tonic-gate * Copyright (c) 1999-2000 by Sun Microsystems, Inc. 26*0Sstevel@tonic-gate * All rights reserved. 27*0Sstevel@tonic-gate */ 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate import java.awt.TextField; 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate /** 32*0Sstevel@tonic-gate * This class is a DCTextField that allows values to wrap around over 33*0Sstevel@tonic-gate * a maximum and a minimum value. 34*0Sstevel@tonic-gate */ 35*0Sstevel@tonic-gate public class DCCircularTextField extends DCTextField { 36*0Sstevel@tonic-gate private int maximum = 59; 37*0Sstevel@tonic-gate private int minimum = 0; 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate /** 40*0Sstevel@tonic-gate * Constructor for DCCircularTextField. 41*0Sstevel@tonic-gate * @param text the text to initilize the text field with 42*0Sstevel@tonic-gate * @param columns the width of the text field in number of columns 43*0Sstevel@tonic-gate */ DCCircularTextField(String text, int columns)44*0Sstevel@tonic-gate public DCCircularTextField(String text, int columns) { 45*0Sstevel@tonic-gate super(text, columns); 46*0Sstevel@tonic-gate } 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate /** 49*0Sstevel@tonic-gate * Sets the maximum allowable value for this field. If the current 50*0Sstevel@tonic-gate * value is greater than this maximum value, then the current value is 51*0Sstevel@tonic-gate * set to the maximum value. 52*0Sstevel@tonic-gate * @param maxValue the maximum integer value for this text field. 53*0Sstevel@tonic-gate */ setMaximum(int maxValue)54*0Sstevel@tonic-gate public void setMaximum(int maxValue) { 55*0Sstevel@tonic-gate maximum = maxValue; 56*0Sstevel@tonic-gate if (getValue() > maxValue) 57*0Sstevel@tonic-gate super.setValue(maxValue); 58*0Sstevel@tonic-gate } 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate /** 61*0Sstevel@tonic-gate * Sets the minimum allowable value for this field. If the current 62*0Sstevel@tonic-gate * value is less than this minimum value, then the current value is 63*0Sstevel@tonic-gate * set to the minimum value. 64*0Sstevel@tonic-gate * @param minValue the minimum integer value for this text field. 65*0Sstevel@tonic-gate */ setMinimum(int minValue)66*0Sstevel@tonic-gate public void setMinimum(int minValue) { 67*0Sstevel@tonic-gate minimum = minValue; 68*0Sstevel@tonic-gate if (getValue() < minValue) 69*0Sstevel@tonic-gate super.setValue(minValue); 70*0Sstevel@tonic-gate } 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate /** 73*0Sstevel@tonic-gate * Increments the value of the textfield. It does a wrap around on 74*0Sstevel@tonic-gate * the max value and min value. 75*0Sstevel@tonic-gate * @param value how much to increment by. It can be negative if one 76*0Sstevel@tonic-gate * desires to decrement. 77*0Sstevel@tonic-gate */ increment(int value)78*0Sstevel@tonic-gate protected final void increment(int value) { 79*0Sstevel@tonic-gate 80*0Sstevel@tonic-gate int current = getValue(); 81*0Sstevel@tonic-gate int next = (current + value); 82*0Sstevel@tonic-gate 83*0Sstevel@tonic-gate /* 84*0Sstevel@tonic-gate * Now wrap it around this way: 85*0Sstevel@tonic-gate */ 86*0Sstevel@tonic-gate 87*0Sstevel@tonic-gate /* 88*0Sstevel@tonic-gate * 89*0Sstevel@tonic-gate * (1) Translate coordinates by 'minimum' to get the minimum to 0 90*0Sstevel@tonic-gate * eg. the legal range -1..5 to 0..6 91*0Sstevel@tonic-gate * or 1..5 to 0..4 92*0Sstevel@tonic-gate */ 93*0Sstevel@tonic-gate int transMax = maximum - minimum; 94*0Sstevel@tonic-gate int transValue = next - minimum; 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate /* 97*0Sstevel@tonic-gate * (2) Now do circular math 98*0Sstevel@tonic-gate */ 99*0Sstevel@tonic-gate transValue %= (transMax + 1); // modulo max+1 since max is permissible 100*0Sstevel@tonic-gate transValue = (transValue < 0)? (transValue + (transMax+1)) : transValue; 101*0Sstevel@tonic-gate 102*0Sstevel@tonic-gate /* 103*0Sstevel@tonic-gate * (3) Translate back to old coordinates 104*0Sstevel@tonic-gate */ 105*0Sstevel@tonic-gate next = transValue + minimum; 106*0Sstevel@tonic-gate 107*0Sstevel@tonic-gate setValue(next); 108*0Sstevel@tonic-gate } 109*0Sstevel@tonic-gate 110*0Sstevel@tonic-gate /** 111*0Sstevel@tonic-gate * Checks to see if the given value would be 112*0Sstevel@tonic-gate * valid for this text 113*0Sstevel@tonic-gate * field. The check looks to see if the value is less than the 114*0Sstevel@tonic-gate * minimum value or greater than the maximum value. 115*0Sstevel@tonic-gate * @param newValue 116*0Sstevel@tonic-gate * @return true if it will be valid, false otherwise. 117*0Sstevel@tonic-gate */ checkValue(int value)118*0Sstevel@tonic-gate public boolean checkValue(int value) { 119*0Sstevel@tonic-gate if (value > maximum || value < minimum) 120*0Sstevel@tonic-gate return false; 121*0Sstevel@tonic-gate else 122*0Sstevel@tonic-gate return true; 123*0Sstevel@tonic-gate } 124*0Sstevel@tonic-gate } 125