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

   1 // $Id$
   2 /**
   3 * Copyright (C) 2013 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 package eu.etaxonomy.taxeditor.ui.element;
  11
  12 import org.eclipse.swt.SWT;
  13 import org.eclipse.swt.events.ModifyEvent;
  14 import org.eclipse.swt.widgets.Composite;
  15 import org.eclipse.swt.widgets.Display;
  16 import org.eclipse.ui.forms.widgets.FormToolkit;
  17
  18 import eu.etaxonomy.cdm.common.CdmUtils;
  19
  20 /**
  21  * @author pplitzner
  22  * @date 01.08.2013
  23  *
  24  */
  25 public class CdmNumberField extends CdmTextField {
  26
  27     private Float start;
  28     private Float end;
  29
  30     private NumberFormatException exception;
  31
  32     /**
  33      * <p>Constructor for NumberWithLabelElement.</p>
  34      *
  35      * @param toolkit a {@link eu.etaxonomy.taxeditor.ui.element.CdmFormFactory} object.
  36      * @param parentElement a {@link eu.etaxonomy.taxeditor.ui.element.ICdmFormElement} object.
  37      * @param labelString a {@link java.lang.String} object.
  38      * @param initialInteger a {@link java.lang.Integer} object.
  39      * @param style a int.
  40      */
  41     public CdmNumberField(Composite parent, FormToolkit formFactory, ICdmFormElement parentFormElement, Integer initialInteger, int style){
  42         this(parent, formFactory, parentFormElement, new Float(initialInteger==null?0:initialInteger), style);
  43     }
  44
  45     /**
  46      * <p>Constructor for NumberWithLabelElement.</p>
  47      *
  48      * @param toolkit a {@link eu.etaxonomy.taxeditor.ui.element.CdmFormFactory} object.
  49      * @param parentElement a {@link eu.etaxonomy.taxeditor.ui.element.ICdmFormElement} object.
  50      * @param labelString a {@link java.lang.String} object.
  51      * @param initialFloat a {@link java.lang.Float} object.
  52      * @param style a int.
  53      * @wbp.parser.constructor
  54      */
  55     public CdmNumberField(Composite parent, FormToolkit formFactory,
  56             ICdmFormElement parentElement, Float initialFloat, int style) {
  57         super(parent, formFactory, parentElement, null, null, style);
  58         //WindowBuilder exception handling
  59         if(initialFloat==null){
  60             initialFloat = 0f;
  61         }
  62         setFloat(initialFloat);
  63     }
  64
  65     /**
  66      * <p>setInteger</p>
  67      *
  68      * @param number a {@link java.lang.Integer} object.
  69      */
  70     public void setInteger(Integer number) {
  71         super.setText(getStringRepresentation(number));
  72     }
  73
  74     /**
  75      * <p>setFloat</p>
  76      *
  77      * @param number a {@link java.lang.Float} object.
  78      */
  79     public void setFloat(Float number) {
  80         super.setText(getStringRepresentation(number));
  81     }
  82
  83     /**
  84      * <p>getInteger</p>
  85      *
  86      * @return a {@link java.lang.Integer} object.
  87      */
  88     public Integer getInteger() {
  89         String text = super.getText().trim();
  90         return text.equals("") ? 0 : new Integer(text);
  91     }
  92
  93     /**
  94      * <p>getFloat</p>
  95      *
  96      * @return a {@link java.lang.Float} object.
  97      */
  98     public Float getFloat(){
  99         String text = super.getText();
 100         return new Float(text);
 101     }
 102
 103     private String getStringRepresentation(Object number){
 104         if(number != null){
 105             return number.toString();
 106         }
 107         return null;
 108     }
 109
 110     /* (non-Javadoc)
 111      * @see eu.etaxonomy.taxeditor.forms.AbstractCdmFormElement#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)
 112      */
 113     /** {@inheritDoc} */
 114     @Override
 115     public void modifyText(ModifyEvent event) {
 116         String value = text.getText();
 117         if(CdmUtils.isEmpty(value)){
 118             text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
 119             return;
 120         }
 121
 122         try{
 123
 124             Float number = Float.parseFloat(value);
 125
 126             if((start != null && number < start) || (end != null && number > end)){
 127                 throw new NumberFormatException("You entered a number that is not within the allowed bounds.");
 128             }
 129
 130         }catch(NumberFormatException e){
 131             text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_RED));
 132             firePropertyChangeEvent(new CdmPropertyChangeEvent(this, e));
 133             exception = e;
 134             return;
 135         }
 136
 137         exception = null;
 138         text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
 139
 140         super.modifyText(event);
 141     }
 142
 143     /**
 144      * <p>setLimits</p>
 145      *
 146      * @param numberOfDigits a int.
 147      * @param start a {@link java.lang.Integer} object.
 148      * @param end a {@link java.lang.Integer} object.
 149      */
 150     public void setLimits(int numberOfDigits, Integer start, Integer end){
 151         setLimits(numberOfDigits, start.floatValue(), end.floatValue());
 152     }
 153
 154     /**
 155      * <p>setLimits</p>
 156      *
 157      * @param numberOfDigits a int.
 158      * @param start a {@link java.lang.Float} object.
 159      * @param end a {@link java.lang.Float} object.
 160      */
 161     public void setLimits(int numberOfDigits, Float start, Float end){
 162         text.setTextLimit(numberOfDigits);
 163         this.start = start;
 164         this.end = end;
 165     }
 166
 167     /**
 168      * <p>Getter for the field <code>exception</code>.</p>
 169      *
 170      * @return the exception
 171      */
 172     public NumberFormatException getException() {
 173         return exception;
 174     }
 175 }