Select


1   /*
2    * ====================================================================
3    * This software is subject to the terms of the Common Public License
4    * Agreement, available at the following URL:
5    *   http://www.opensource.org/licenses/cpl.html .
6    * Copyright (C) 2003-2004 TONBELLER AG.
7    * All Rights Reserved.
8    * You must accept the terms of that agreement to use this software.
9    * ====================================================================
10   *
11   * 
12   */
13  package com.tonbeller.wcf.ui;
14  
15  import java.util.ArrayList  ;
16  import java.util.Iterator  ;
17  import java.util.List  ;
18  
19  import org.w3c.dom.Element  ;
20  import org.w3c.dom.Node  ;
21  import org.w3c.dom.NodeList  ;
22  
23  import com.tonbeller.wcf.utils.XoplonNS;
24  
25  /**
26   * A Select (ListBox, RadioButtons, etc) may have a type and modelReference. If
27   * both are present, the modelReference will be updated to contain the value of 
28   * the selected items.
29   * 
30   * @author av
31   */
32  public class Select extends TypedCtrl {
33  
34  
35    public static void removeAllItems(Element   element) {
36      List   lis = getItems(element);
37      Iterator   en = lis.iterator();
38      while (en.hasNext()) {
39        Element   item = (Element  ) en.next();
40        element.removeChild(item);
41      }
42    }
43  
44  
45    /** sets selection. 
46     * @param li the item to select. Must be a child of element
47     */
48    public static void setSelection(Element   element, Element   item) {
49      Iterator   it = getItems(element).iterator();
50      while (it.hasNext())
51        Item.setSelected((Element  )it.next(), false);
52      Item.setSelected(item, true);
53    }
54  
55    /** sets selection. 
56     * @param items a list of Elements which must be children of element
57     */
58    public static void setSelectedItems(Element   element, List   items) {
59      Iterator   it = getItems(element).iterator();
60      while (it.hasNext())
61        Item.setSelected((Element  )it.next(), false);
62      
63      it = items.iterator();
64      while (it.hasNext())
65        Item.setSelected((Element  )it.next(), true);
66    }
67  
68  
69    /** removes item from the selection
70     * @param item the item to remove from selection
71     */
72    public static void removeSelection(Element   element, Element   item) {
73      Item.setSelected(item, false);
74    }
75  
76    /** add list item  */
77    public static void addItem(Element   element, Element   li) {
78      element.appendChild(li);
79    }
80  
81    /** remove list item */
82    public static void removeItem(Element   element, Element   li) {
83      element.removeChild(li);
84    }
85  
86    /** return the items */
87    public static List   getItems(Element   element) {
88      List   lis = new ArrayList  ();
89  
90      // iterate children
91      NodeList   children = element.getChildNodes();
92      for (int i = 0; i < children.getLength(); ++i) {
93        Node   child = children.item(i);
94        if (child.getNodeType() == Node.ELEMENT_NODE) {
95          lis.add(child);
96        }
97      } // iterate children
98  
99      return lis;
100   }
101 
102   /**
103    * returns the selected items separated by ';'. Counting starts at 1.
104    * This is suitable for the WAP &lt;select&gt; elements iname/ivalue
105    * attribute.
106    */
107   public static void getIValue(Element   element) {
108     XoplonNS.getAttribute(element, "ivalue");
109   }
110 
111   /**
112    * sets the ivalue attribute for WAP browsers.
113    * @see #getIValue
114    */
115   public static void setIValue(Element   element) {
116     List   list = getItems(element);
117     Iterator   en = list.iterator();
118     int index = 1;
119     StringBuffer   sb = new StringBuffer  ();
120     boolean first = true;
121     while (en.hasNext()) {
122       Element   item = (Element  ) en.next();
123       if (ListItem.isSelected(item)) {
124         if (first)
125           first = false;
126         else
127           sb.append(';');
128         sb.append(index);
129       }
130       ++index;
131     }
132     XoplonNS.setAttribute(element, "ivalue", sb.toString());
133   }
134 
135 
136 
137 }
138
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