/*******************************************************************************
* CogTool Copyright Notice and Distribution Terms
* CogTool 1.3, Copyright (c) 2005-2013 Carnegie Mellon University
* This software is distributed under the terms of the FSF Lesser
* Gnu Public License (see LGPL.txt).
*
* CogTool is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* CogTool is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with CogTool; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* CogTool makes use of several third-party components, with the
* following notices:
*
* Eclipse SWT version 3.448
* Eclipse GEF Draw2D version 3.2.1
*
* Unless otherwise indicated, all Content made available by the Eclipse
* Foundation is provided to you under the terms and conditions of the Eclipse
* Public License Version 1.0 ("EPL"). A copy of the EPL is provided with this
* Content and is also available at http://www.eclipse.org/legal/epl-v10.html.
*
* CLISP version 2.38
*
* Copyright (c) Sam Steingold, Bruno Haible 2001-2006
* This software is distributed under the terms of the FSF Gnu Public License.
* See COPYRIGHT file in clisp installation folder for more information.
*
* ACT-R 6.0
*
* Copyright (c) 1998-2007 Dan Bothell, Mike Byrne, Christian Lebiere &
* John R Anderson.
* This software is distributed under the terms of the FSF Lesser
* Gnu Public License (see LGPL.txt).
*
* Apache Jakarta Commons-Lang 2.1
*
* This product contains software developed by the Apache Software Foundation
* (http://www.apache.org/)
*
* jopt-simple version 1.0
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* Copyright (c) 2004-2013 Paul R. Holser, Jr.
*
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* a copy of this software and associated documentation files (the
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Mozilla XULRunner 1.9.0.5
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* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
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* Software distributed under the License is distributed on an "AS IS"
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******************************************************************************/
package edu.cmu.cs.hcii.cogtool.util;
import java.text.NumberFormat;
import java.util.Locale;
import org.eclipse.swt.widgets.Composite;
public class DoubleEntry extends IntegerEntry
{
public static final int FREE_FORM = -1;
protected int decimalPlaces = FREE_FORM;
public DoubleEntry(Composite parent, int style)
{
super(parent, style);
}
/**
* Acceptable characters in a double entry SWT widget:
* Numerics: Character.DECIMAL_DIGIT_NUMBER
* (apparently, this subsumes SWT.KEYPAD_0-9)
* Also, the string can contain at most one decimal point
*
* @param key the character to be tested
* @return if the given character is acceptable as input to the Combo
*/
@Override
protected boolean acceptableCharacter(char key)
{
if (key == '-') {
return isNegativeAcceptable();
}
boolean isNumber =
(Character.getType(key) == Character.DECIMAL_DIGIT_NUMBER);
boolean noPoint = (getText().indexOf(".") == -1);
return isNumber || (noPoint && (key == '.'));
}
@Override
protected String getValueBasePattern()
{
return "(\\d+\\.?\\d*)|(\\d*\\.?\\d+)";
}
/**
* Avoid calling this after the DoubleEntry has been disposed;
* for example, if it is part of a dialog box, you must call this when
* the associated OK button is pressed and not after (when the dialog
* has been closed/disposed).
*/
public double getDoubleValue()
{
String valueStr = stripUnits(getText());
if ((valueStr == null) || valueStr.equals("") || valueStr.equals(".")) {
return 0.0;
}
String textWithNoCommas = valueStr.replaceAll(",", "");
try {
return Double.parseDouble(textWithNoCommas);
}
catch (NumberFormatException e) {
return 0.0;
}
}
public void setDoubleValue(double newValue)
{
setText(Double.toString(newValue));
}
public int getDecimalPlaces()
{
return decimalPlaces;
}
public void setDecimalPlaces(int newPlaces)
{
decimalPlaces = newPlaces;
}
@Override
public String isProperEntry(String newText, boolean emptyOk)
{
if ((newText == null) || newText.equals("")) {
return emptyOk ? newText : null;
}
newText = stripUnits(newText);
boolean isNumber = true;
boolean sawDecimalPoint = false;
for (int i = 0; i < newText.length(); i++) {
char c = newText.charAt(i);
if ((i == 0) && (c == '-')) {
isNumber = allowsNegative();
}
else if (Character.getType(c) != Character.DECIMAL_DIGIT_NUMBER) {
if (c != '.') {
isNumber = false;
}
else {
if (sawDecimalPoint) {
isNumber = false;
}
else {
sawDecimalPoint = true;
}
}
}
}
return isNumber ? newText : null;
}
@Override
public void setText(String newText)
{
// If newText is null or "", do not format the number
String properEntry = isProperEntry(newText, false);
if ((properEntry != null) && (decimalPlaces != FREE_FORM)) {
NumberFormat nFmtr = NumberFormat.getInstance(Locale.US);
nFmtr.setMaximumFractionDigits(decimalPlaces);
nFmtr.setMinimumFractionDigits(decimalPlaces);
newText = nFmtr.format(Double.parseDouble(properEntry));
}
super.setText(newText);
}
}