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

   1 // $Id$
   2 /**
   3 * Copyright (C) 2007 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10
  11 package eu.etaxonomy.taxeditor.ui.element;
  12
  13 import org.apache.commons.lang.StringUtils;
  14 import org.eclipse.swt.SWT;
  15 import org.eclipse.swt.events.ModifyEvent;
  16 import org.eclipse.swt.widgets.Display;
  17
  18 import eu.etaxonomy.taxeditor.ui.campanula.compatibility.ICdmFormElement;
  19
  20 /**
  21  * <p>NumberWithLabelElement class.</p>
  22  *
  23  * @author n.hoffmann
  24  * @created Mar 22, 2010
  25  * @version 1.0
  26  */
  27 public class NumberWithLabelElement extends TextWithLabelElement {
  28
  29         private Float start;
  30         private Float end;
  31
  32         private NumberFormatException exception;
  33
  34         /**
  35          * <p>Constructor for NumberWithLabelElement.</p>
  36          *
  37          * @param toolkit a {@link eu.etaxonomy.taxeditor.ui.element.CdmFormFactory} object.
  38          * @param parentElement a {@link eu.etaxonomy.taxeditor.ui.element.ICdmFormElement} object.
  39          * @param labelString a {@link java.lang.String} object.
  40          * @param initialNumber a {@link java.lang.Number} object.
  41          * @param style a int.
  42          */
  43         public NumberWithLabelElement(CdmFormFactory toolkit,
  44                         ICdmFormElement parentElement, String labelString,
  45                         Number initialNumber, int style) {
  46                 super(toolkit, parentElement, labelString, null, null, style);
  47                 setNumber(initialNumber);
  48         }
  49
  50
  51         /**
  52          * <p>setNumber</p>
  53          *
  54          * @param number a {@link java.lang.Number} object.
  55          */
  56         public void setNumber(Number number) {
  57                 super.setText(getStringRepresentation(number));
  58         }
  59
  60         /**
  61          * <p>getInteger</p>
  62          *
  63          * @return a {@link java.lang.Integer} object.
  64          */
  65         public Integer getInteger() {
  66                 String text = super.getText().trim();
  67                 return text.equals("") ? 0 : new Integer(text);
  68         }
  69
  70         /**
  71          * <p>getFloat</p>
  72          *
  73          * @return a {@link java.lang.Float} object.
  74          */
  75         public Float getFloat(){
  76                 String text = super.getText();
  77                 return new Float(text);
  78         }
  79
  80         /**
  81          * <p>getDouble</p>
  82          *
  83          * @return a {@link java.lang.Float} object.
  84          */
  85         public Double getDouble(){
  86                 String text = super.getText();
  87                 return new Double(text);
  88         }
  89
  90         private String getStringRepresentation(Object number){
  91                 if(number != null){
  92                         return number.toString();
  93                 }
  94                 return null;
  95         }
  96
  97         /* (non-Javadoc)
  98          * @see eu.etaxonomy.taxeditor.forms.AbstractCdmFormElement#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)
  99          */
 100         /** {@inheritDoc} */
 101         @Override
 102         public void modifyText(ModifyEvent event) {
 103                 String value = text.getText();
 104                 if(StringUtils.isBlank(value)){
 105                         text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
 106                         return;
 107                 }
 108
 109                 try{
 110
 111                         Float number = Float.parseFloat(value);
 112
 113                         if((start != null && number < start) || (end != null && number > end)){
 114                                 throw new NumberFormatException("You entered a number that is not within the allowed bounds.");
 115                         }
 116
 117                 }catch(NumberFormatException e){
 118                         text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_RED));
 119                         firePropertyChangeEvent(new CdmPropertyChangeEvent(this, e));
 120                         exception = e;
 121                         return;
 122                 }
 123
 124                 exception = null;
 125                 text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
 126
 127                 super.modifyText(event);
 128         }
 129
 130         /**
 131          * <p>setLimits</p>
 132          *
 133          * @param numberOfDigits a int.
 134          * @param start a {@link java.lang.Integer} object.
 135          * @param end a {@link java.lang.Integer} object.
 136          */
 137         public void setLimits(int numberOfDigits, Integer start, Integer end){
 138                 setLimits(numberOfDigits, start.floatValue(), end.floatValue());
 139         }
 140
 141         /**
 142          * <p>setLimits</p>
 143          *
 144          * @param numberOfDigits a int.
 145          * @param start a {@link java.lang.Float} object.
 146          * @param end a {@link java.lang.Float} object.
 147          */
 148         public void setLimits(int numberOfDigits, Float start, Float end){
 149                 text.setTextLimit(numberOfDigits);
 150                 this.start = start;
 151                 this.end = end;
 152         }
 153
 154         /**
 155          * <p>Getter for the field <code>exception</code>.</p>
 156          *
 157          * @return the exception
 158          */
 159         public NumberFormatException getException() {
 160                 return exception;
 161         }
 162 }