eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/ui/element/BigDecimalWithLabelElement.java

   1 /**
   2 * Copyright (C) 2020 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9 package eu.etaxonomy.taxeditor.ui.element;
  10
  11 import java.math.BigDecimal;
  12
  13 import org.apache.commons.lang3.StringUtils;
  14 import org.eclipse.swt.SWT;
  15 import org.eclipse.swt.events.ModifyEvent;
  16 import org.eclipse.swt.widgets.Display;
  17
  18 /**
  19  * @author k.luther
  20  * @since May 27, 2020
  21  */
  22 public class BigDecimalWithLabelElement extends NumberWithLabelElement {
  23
  24
  25     public BigDecimalWithLabelElement(CdmFormFactory toolkit, ICdmFormElement parentElement, String labelString,
  26             Number initialNumber, int style) {
  27         super(toolkit, parentElement, labelString, initialNumber, style);
  28     }
  29
  30     private BigDecimal start;
  31     private BigDecimal end;
  32
  33     @Override
  34     public void modifyText(ModifyEvent event) {
  35         String value = text.getText();
  36         if(StringUtils.isBlank(value)){
  37             text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
  38             super.modifyText(event);
  39             return;
  40         }
  41
  42         try{
  43             String pattern = "-?\\d{0,9}(.\\d{0,9})?";
  44             if (value.matches(pattern)){
  45                 if ("-".equals(value)){
  46                     //accept entry
  47                 }else{
  48                     BigDecimal number = new BigDecimal(value);
  49                     if((start != null && number.compareTo(start) < 0 || (end != null && number.compareTo(end) > 0))){
  50                         exception = new NumberFormatException("You entered a number that is not within the allowed bounds.");
  51                         throw exception;
  52                     }
  53                 }
  54             }else{
  55                 exception = new NumberFormatException("You entered a number that is not within the allowed bounds.");
  56                 throw exception;
  57             }
  58         }catch(NumberFormatException e){
  59             text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_RED));
  60             firePropertyChangeEvent(new CdmPropertyChangeEvent(this, event));
  61             exception = e;
  62             return;
  63         }
  64
  65         exception = null;
  66         text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
  67
  68         super.modifyText(event);
  69     }
  70
  71     /**
  72      * <p>setLimits</p>
  73      *
  74      * @param numberOfDigits a int.
  75      * @param start a {@link java.lang.Integer} object.
  76      * @param end a {@link java.lang.Integer} object.
  77      */
  78
  79     public void setLimits(int numberOfDigits, BigDecimal start, BigDecimal end){
  80         text.setTextLimit(numberOfDigits);
  81         this.start = start;
  82         this.end = end;
  83     }
  84
  85     public BigDecimal getBigDecimal(){
  86         String text = super.getText();
  87         if (StringUtils.isBlank(text) || "-".equals(text)){
  88             return null;
  89         }
  90         try {
  91             return new BigDecimal(text);
  92         } catch (NumberFormatException e) {
  93             exception = e;
  94             return null;
  95         }
  96     }
  97 }