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

   1 /**
   2 * Copyright (C) 2007 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
  10 package eu.etaxonomy.taxeditor.ui.element;
  11
  12 import org.apache.commons.lang.StringUtils;
  13 import org.eclipse.swt.SWT;
  14 import org.eclipse.swt.events.ModifyEvent;
  15 import org.eclipse.swt.widgets.Display;
  16
  17
  18 /**
  19  * <p>NumberWithLabelElement class.</p>
  20  *
  21  * @author n.hoffmann
  22  * @created Mar 22, 2010
  23  */
  24 public class NumberWithLabelElement extends TextWithLabelElement {
  25
  26         private Float start;
  27         private Float end;
  28
  29         private NumberFormatException exception;
  30
  31         /**
  32          * <p>Constructor for NumberWithLabelElement.</p>
  33          *
  34          * @param toolkit a {@link eu.etaxonomy.taxeditor.ui.element.CdmFormFactory} object.
  35          * @param parentElement a {@link eu.etaxonomy.taxeditor.ui.element.ICdmFormElement} object.
  36          * @param labelString a {@link java.lang.String} object.
  37          * @param initialNumber a {@link java.lang.Number} object.
  38          * @param style a int.
  39          */
  40         public NumberWithLabelElement(CdmFormFactory toolkit,
  41                         ICdmFormElement parentElement, String labelString,
  42                         Number initialNumber, int style) {
  43                 super(toolkit, parentElement, labelString, null, null, style);
  44                 setNumber(initialNumber);
  45         }
  46
  47         /**
  48      * <p>Constructor for NumberWithLabelElement.</p>
  49      *
  50      * @param toolkit a {@link eu.etaxonomy.taxeditor.ui.element.CdmFormFactory} object.
  51      * @param parentElement a {@link eu.etaxonomy.taxeditor.ui.element.ICdmFormElement} object.
  52      * @param labelString a {@link java.lang.String} object.
  53      * @param initialNumber a {@link java.lang.Number} object.
  54      * @param style a int.
  55      */
  56     public NumberWithLabelElement(CdmFormFactory toolkit,
  57             ICdmFormElement parentElement, String labelString,
  58             Number initialNumber, Integer height, Integer length, int style) {
  59         super(toolkit, parentElement, labelString, null, null, style);
  60         setNumber(initialNumber);
  61     }
  62
  63
  64         /**
  65          * <p>setNumber</p>
  66          *
  67          * @param number a {@link java.lang.Number} object.
  68          */
  69         public void setNumber(Number number) {
  70                 super.setText(getStringRepresentation(number));
  71         }
  72
  73         /**
  74          * Get the value of this field as an {@link Integer}.
  75          * @return the Integer value or null if {@link NumberFormatException} occurs.
  76          */
  77         public Integer getInteger() {
  78             if(super.getText()!=null){
  79                 String text = super.getText().trim();
  80                 try {
  81                     return StringUtils.isBlank(text) ? null : new Integer(text);
  82                 } catch (NumberFormatException e) {
  83                     exception = e;
  84                 }
  85             }
  86                 return null;
  87         }
  88
  89         /**
  90          * Get the value of this field as a {@link Float}.
  91          * @return the Float value or null if {@link NumberFormatException} occurs.
  92          */
  93         public Float getFloat(){
  94             String text = super.getText();
  95             try {
  96                 return StringUtils.isBlank(text) ? null : new Float(text);
  97             } catch (NumberFormatException e) {
  98                 exception = e;
  99             }
 100             return null;
 101         }
 102
 103         /**
 104          * Get the value of this field as an {@link Double}.
 105          * @return the Double value or null if {@link NumberFormatException} occurs.
 106          */
 107         public Double getDouble(){
 108             String text = super.getText();
 109             try {
 110                 return StringUtils.isBlank(text) ? null : new Double(text);
 111             } catch (NumberFormatException e) {
 112                 exception = e;
 113             }
 114             return null;
 115         }
 116
 117         private String getStringRepresentation(Object number){
 118                 if(number != null){
 119                         return number.toString();
 120                 }
 121                 return null;
 122         }
 123
 124         /** {@inheritDoc} */
 125         @Override
 126         public void modifyText(ModifyEvent event) {
 127                 String value = text.getText();
 128                 if(StringUtils.isBlank(value)){
 129                         text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
 130                         super.modifyText(event);
 131                         return;
 132                 }
 133
 134                 try{
 135                         Float number = Float.parseFloat(value);
 136                         if((start != null && number < start) || (end != null && number > end)){
 137                                 exception = new NumberFormatException("You entered a number that is not within the allowed bounds.");
 138                                 throw exception;
 139                         }
 140                 }catch(NumberFormatException e){
 141                         text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_RED));
 142                         firePropertyChangeEvent(new CdmPropertyChangeEvent(this, event));
 143                         exception = e;
 144                         return;
 145                 }
 146
 147                 exception = null;
 148                 text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
 149
 150                 super.modifyText(event);
 151         }
 152
 153         /**
 154          * <p>setLimits</p>
 155          *
 156          * @param numberOfDigits a int.
 157          * @param start a {@link java.lang.Integer} object.
 158          * @param end a {@link java.lang.Integer} object.
 159          */
 160         public void setLimits(int numberOfDigits, Integer start, Integer end){
 161                 setLimits(numberOfDigits, start.floatValue(), end.floatValue());
 162         }
 163
 164         /**
 165          * <p>setLimits</p>
 166          *
 167          * @param numberOfDigits a int.
 168          * @param start a {@link java.lang.Float} object.
 169          * @param end a {@link java.lang.Float} object.
 170          */
 171         public void setLimits(int numberOfDigits, Float start, Float end){
 172                 text.setTextLimit(numberOfDigits);
 173                 this.start = start;
 174                 this.end = end;
 175         }
 176
 177         /**
 178          * <p>Getter for the field <code>exception</code>.</p>
 179          *
 180          * @return the exception
 181          */
 182         public NumberFormatException getException() {
 183                 return exception;
 184         }
 185 }