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