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Java > Open Source Codes > com > jcorporate > expresso > ext > struts > taglib > html > ExLayerTag


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64
65 package com.jcorporate.expresso.ext.struts.taglib.html;
66
67 /*
68  * ExLayerTag.java
69  *
70  * Copyright 2002, 2002 Yves Henri AMAIZO.
71  * amy_amaizo@compuserve.com
72  */
73
74 import com.jcorporate.expresso.core.misc.StringUtil;
75 import org.apache.struts.taglib.html.BaseFieldTag;
76 import org.apache.struts.util.ResponseUtils;
77
78 import javax.servlet.jsp.JspException JavaDoc;
79
80 /**
81  *
82  * Sample:
83  * <code>
84  * <%@taglib uri="/WEB-INF/tld/expresso.tld" prefix="expresso"%>
85  * <%@taglib uri="/WEB-INF/tld/expresso-html.tld" prefix="html"%>
86  * <html:html locale="true">
87  * <head>
88  * <TITLE>Sample TagLib Layer</TITLE>
89  * </head>
90  * <body>
91  * <html:form action="/expresso/Test.do">
92  * <table border="0" bgcolor="red">
93  * <tr>
94  * <TD width="10">Titre1</TD>
95  * <TD align="left" width="10"><html:radioLayer property="toto" id="titi" action="show" value="Yes"/>Yes</TD>
96  * <TD width="100%"align="left"><html:radioLayer property="toto" id="titi" action="hide" value="No"/>No</TD>
97  * </tr>
98  * <TR height="1">
99  * <TD colspan="3" height="1">
100  * <html:layer id="titi" state="hide">
101  * <table border="0" bgcolor="GREEN">
102  * <tr>
103  * <TD bgcolor="WHITE">Titre2</TD>
104  * <TD bgcolor="WHITE"><html:radioLayer property="toto" id="titi2" action="show" value="Yes"/>Yes</TD>
105  * <TD bgcolor="WHITE"><html:radioLayer property="toto" id="titi2" action="hide" value="No"/>No</TD>
106  * </tr>
107  * <tr height="1" bgcolor="WHITE">
108  * <TD height="1" colspan="3" bgcolor="WHITE"><html:layer id="titi2" state="hide"><expresso:InputTag name="toto"/></html:layer></TD>
109  * </tr>
110  * </table>
111  * </html:layer>
112  * </TD>
113  * </tr>
114  * </table>
115  * </html:form>
116  * </body>
117  * </html:html>
118  * </code>
119  *
120  */
121
122 /**
123  * Tag for input fields of type "Layer".
124  *
125  * @author Yves Henri AMAIZO
126  */
127 public class ExLayerTag extends BaseFieldTag {
128
129     private String JavaDoc id = "";
130
131     private String JavaDoc state = "SHOW";
132
133     private String JavaDoc tag = "SPAN";
134
135
136     private static String JavaDoc SPAN = "SPAN";
137     private static String JavaDoc DIV = "DIV";
138     private static String JavaDoc FONT = "FONT";
139
140     protected static String JavaDoc SHOW = "block";
141     protected static String JavaDoc HIDE = "none";
142
143     /**
144      * Constructor for LayerTag
145      */
146     public ExLayerTag() {
147         super();
148     }
149
150     public int doStartTag() throws JspException JavaDoc {
151
152         StringBuffer JavaDoc results = new StringBuffer JavaDoc();
153         results.append("<");
154         results.append(tag);
155         results.append(" id=\"");
156         results.append(id);
157         results.append("\"");
158         results.append(prepareEventHandlers());
159         String JavaDoc style = StringUtil.notNull(getStyle());
160         setStyle("display:" + state + ";" + style);
161         results.append(prepareStyles());
162         results.append(">");
163         ResponseUtils.write(pageContext, results.toString());
164         //return EVAL_BODY_TAG;
165 return EVAL_BODY_BUFFERED;
166     }
167
168
169     public int doEndTag() throws JspException JavaDoc {
170         StringBuffer JavaDoc results = new StringBuffer JavaDoc();
171         results.append(getBodyContent().getString());
172         results.append("</");
173         results.append(tag);
174         results.append(">");
175         ResponseUtils.write(pageContext, results.toString());
176         return EVAL_PAGE;
177     }
178
179     /**
180      * Gets the id
181      *
182      * @return Returns a String
183      */
184     public String JavaDoc getId() {
185         return id;
186     }
187
188     /**
189      * Sets the id
190      *
191      * @param id The id to set
192      */
193     public void setId(String JavaDoc id) {
194         this.id = id;
195     }
196
197     /**
198      * Gets the display
199      *
200      * @return Returns a String
201      */
202     public String JavaDoc getState() {
203         return state;
204     }
205
206     /**
207      * Sets the display
208      *
209      * @param state The display to set
210      * @throws JspException for invalid parameters
211      */
212     public void setState(String JavaDoc state) throws JspException JavaDoc {
213         if (state.equalsIgnoreCase("SHOW")) {
214             this.state = SHOW;
215         } else {
216             if (state.equalsIgnoreCase("HIDE")) {
217                 this.state = HIDE;
218             } else {
219                 throw new JspException JavaDoc("state must be hide or show");
220             }
221         }
222     }
223
224     /**
225      * Gets the tag
226      *
227      * @return Returns a String
228      */
229     public String JavaDoc getTag() {
230         return tag;
231     }
232
233     /**
234      * Sets the tag
235      *
236      * @param tag The tag to set
237      * @throws JspException for invalid parameters
238      */
239     public void setTag(String JavaDoc tag) throws JspException JavaDoc {
240         if (tag.equalsIgnoreCase(SPAN)) {
241             this.tag = SPAN;
242         } else {
243             if (tag.equalsIgnoreCase(DIV)) {
244                 this.tag = DIV;
245             } else {
246                 if (tag.equalsIgnoreCase(FONT)) {
247                     this.tag = FONT;
248                 } else {
249                     throw new JspException JavaDoc("tag must be 'span' 'div' or 'font'");
250                 }
251             }
252         }
253     }
254
255
256 }
257
258
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