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Java > Open Source Codes > fr > improve > struts > taglib > layout > field > RadioTag


1 package fr.improve.struts.taglib.layout.field;
2
3 import javax.servlet.jsp.JspException JavaDoc;
4
5 import org.apache.struts.taglib.html.BaseHandlerTag;
6
7 import fr.improve.struts.taglib.layout.util.LayoutUtils;
8 import fr.improve.struts.taglib.layout.util.TagUtils;
9
10 /**
11  * This tag displays one radio button and works like the one in the html tag library.
12  *
13  * @author: Jean-Noel Ribette
14  * @version: 0.2
15  **/
16 public class RadioTag extends AbstractFieldTag {
17     private org.apache.struts.taglib.html.RadioTag radioTag =
18         new org.apache.struts.taglib.html.RadioTag();
19
20     protected boolean doBeforeValue() throws javax.servlet.jsp.JspException JavaDoc {
21         fieldTag = radioTag;
22         return true;
23     }
24     
25     /**
26      * Override doStartInspectField to display the right images.
27      */
28     public int doStartInspectField() throws JspException JavaDoc {
29     // Maybe do something before dispaying the value.
30 if (!doBeforeValue()) return SKIP_BODY;
31             
32     StringBuffer JavaDoc sb = new StringBuffer JavaDoc();
33     // If the value is selected, display the image of a selected checkbox.
34 if (isChecked()) {
35         sb.append("<img SRC=\"");
36         sb.append(getSkin().getImageDirectory(pageContext.getRequest()));
37         sb.append("/");
38         sb.append(getSkin().getProperty("layout.checkbox.checked"));
39         sb.append("\" border=\"0\" alt=\"");
40         sb.append(getSkin().getProperty("layout.checkbox.checked.label"));
41         sb.append("\">");
42     } else {
43         String JavaDoc lc_imgsrc = getSkin().getProperty("layout.checkbox.unchecked");
44         if (lc_imgsrc!=null && lc_imgsrc.length()>0) {
45             sb.append("<img SRC=\"");
46             sb.append(getSkin().getImageDirectory(pageContext.getRequest()));
47             sb.append("/");
48             sb.append(lc_imgsrc);
49             sb.append("\" border=\"0\" alt=\"");
50             sb.append(getSkin().getProperty("layout.checkbox.unchecked.label"));
51             sb.append("\">");
52         }
53     }
54     TagUtils.write(pageContext, sb.toString());
55
56     doAfterValue();
57     
58     return EVAL_BODY_INCLUDE;
59 }
60     /**
61      * @see fr.improve.struts.taglib.layout.field.AbstractModeFieldTag#printSimpleHiddenValue(Object)
62      */
63     protected void printSimpleHiddenValue(Object JavaDoc in_value) throws JspException JavaDoc {
64         // we must not render anything if the radio button is not selected.
65 if (isChecked()) {
66             super.printSimpleHiddenValue(in_value);
67         }
68     }
69     
70     private boolean isChecked() throws JspException JavaDoc {
71         Object JavaDoc lc_value = LayoutUtils.getBeanFromPageContext(pageContext, name, property);
72         return lc_value==null && value==null || lc_value!=null && lc_value.toString().equals(value);
73     }
74
75     /**
76      * @see fr.improve.struts.taglib.layout.field.AbstractModeFieldTag#isFill(Object)
77      */
78     public boolean isFill(Object JavaDoc lc_value) throws JspException JavaDoc {
79         return isChecked();
80     }
81     
82     protected void copyProperties(BaseHandlerTag in_dest) throws JspException JavaDoc {
83         super.copyProperties(in_dest);
84         radioTag.setProperty(getProperty());
85         radioTag.setValue(getValue());
86         radioTag.setName(getName());
87     }
88
89 }
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