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1
13 package com.tonbeller.wcf.sqltable;
14
15 import java.io.IOException  ;
16 import java.io.UnsupportedEncodingException ;
17 import java.util.MissingResourceException ;
18
19 import javax.servlet.http.HttpServletRequest ;
20 import javax.servlet.jsp.JspException ;
21
22 import org.apache.log4j.Logger;
23
24 import com.tonbeller.tbutils.res.Resources;
25 import com.tonbeller.wcf.controller.RequestContext;
26 import com.tonbeller.wcf.controller.RequestListener;
27 import com.tonbeller.wcf.scroller.Scroller;
28
29
33 public class SqlTableSortButtonTag extends SqlTableNestedTag {
34 String column;
35 private static final Logger logger = Logger.getLogger(SqlTableSortButtonTag.class);
36
37 static class SortButtonHandler implements RequestListener {
38 private String column;
39 private boolean descending;
40 private SqlTable table;
41
42 SortButtonHandler(SqlTable table, String column, boolean descending) {
43 this.table = table;
44 this.column = column;
45 this.descending = descending;
46 }
47
48 public void request(RequestContext context) throws Exception {
49 Scroller.enableScroller(context);
50 table.setOrderBy(column);
51 table.setDescending(descending);
52 }
53 }
54
55 public int doStartTag() throws JspException {
56 try {
57 if (!isRenderActions())
58 return SKIP_BODY;
59
60 SqlTable table = getTable();
61 if (table.getOrderBy() == null)
62 throw new JspException ("sqlTable must have the orderBy attribute set to use sort buttons");
63 RequestListener rl = getSortButtonHandler(table);
64 String name = table.nextId();
65 table.addRequestListener(name, null, rl);
66
67 String imgSrc = getSortButtonImageSource(table);
68 Object [] args = { name, imgSrc};
69 Resources res = getResources();
70 String imgTag = res.getString("sqltable.sort.imgtag", args);
71
72 pageContext.getOut().print(imgTag);
73 } catch (UnsupportedEncodingException e) {
74 logger.error(null, e);
75 } catch (MissingResourceException e) {
76 logger.error(null, e);
77 } catch (IOException e) {
78 logger.error(null, e);
79 }
80
81 return SKIP_BODY;
82 }
83
84 private RequestListener getSortButtonHandler(SqlTable table) {
85 String currentColumn = table.getOrderBy();
86 if (currentColumn.equals(column))
88 return new SortButtonHandler(table, column, !table.isDescending());
89 return new SortButtonHandler(table, column, table.isDescending());
91 }
92
93 private String getSortButtonImageSource(SqlTable table) throws JspException {
94 Resources res = getResources();
95 String contextPath = ((HttpServletRequest ) pageContext.getRequest()).getContextPath();
96 String currentColumn = table.getOrderBy();
97 if (currentColumn == null)
98 throw new JspException ("sqlTable must have the orderBy attribute set to use sort buttons");
99 if (currentColumn.equals(column)) {
100 if (table.isDescending())
101 return res.getString("sqltable.sortimg.cur.desc", contextPath);
102 return res.getString("sqltable.sortimg.cur.asc", contextPath);
103 }
104 if (table.isDescending())
105 return res.getString("sqltable.sortimg.other.desc", contextPath);
106 return res.getString("sqltable.sortimg.other.asc", contextPath);
107 }
108
109 public void setColumn(String column) {
110 this.column = column;
111 }
112
113 }
114 |
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