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1 package com.tonbeller.wcf.wizard;
2
3 import java.util.ArrayList  ;
4 import java.util.List ;
5
6 import org.apache.log4j.Logger;
7 import org.w3c.dom.Document ;
8
9 import com.tonbeller.wcf.component.Component;
10 import com.tonbeller.wcf.component.ComponentSupport;
11 import com.tonbeller.wcf.controller.RequestContext;
12 import com.tonbeller.wcf.wizard.WizardPage.WizardPagePosition;
13
14
17 public class WizardComponent extends ComponentSupport {
18 private List pages = new ArrayList ();
19 private WizardPage current = null;
20
21 private static Logger logger = Logger.getLogger(WizardComponent.class);
22
23 private PageListener pageListener = new PageListener() {
24 public void onNext(RequestContext context) throws Exception {
25 setCurrentPageIndex(getCurrentPageIndex() + 1);
26 }
27
28 public void onBack(RequestContext context) throws Exception {
29 setCurrentPageIndex(getCurrentPageIndex() - 1);
30 }
31
32 public void onFinish(RequestContext context) throws Exception {
33 int pageCnt = pages.size();
35 int cur = getCurrentPageIndex();
36 for(int i=cur+1; i<pageCnt; i++) {
37 WizardPage page = (WizardPage) pages.get(i);
38 page.pageSkipped();
39 }
40
41 setCurrentPageIndex(0);
42 }
43
44 public void onCancel(RequestContext context) throws Exception {
45 setCurrentPageIndex(0);
46 }
47 };
48
49 public WizardComponent(String id, Component parent) {
50 super(id, parent);
51 }
52
53 public int getPageCount() {
54 return pages.size();
55 }
56
57 public int getCurrentPageIndex() {
58 return pages.indexOf(current);
59 }
60
61 public void setCurrentPageIndex(int page) {
62 if(page>=pages.size())
63 throw new IllegalArgumentException ("Invalid index " + page);
64
65 current = (WizardPage) pages.get(page);
66 adjustVisibility();
67 }
68
69 public WizardPage getCurrentPage() {
70 return current;
71 }
72
73 public void setCurrentPage(WizardPage page) {
74 if (!pages.contains(page))
75 throw new IllegalArgumentException ("page must be registered with the wizard");
76 this.current = page;
77 adjustVisibility();
78 }
79
80 public void addPage(WizardPage page) {
81 pages.add(page);
82 page.addPageListener(pageListener);
83 int cnt = pages.size();
84 for(int i=0; i<cnt; i++) {
85 WizardPage wp = (WizardPage) pages.get(i);
86 if(cnt==1)
87 wp.pageAdded(WizardPagePosition.SINGLE_PAGE);
88 else if(i==0)
89 wp.pageAdded(WizardPagePosition.FIRST_PAGE);
90 else if(i==cnt-1)
91 wp.pageAdded(WizardPagePosition.LAST_PAGE);
92 else
93 wp.pageAdded(WizardPagePosition.MIDDLE_PAGE);
94 }
95 }
96
97 public void removePage(WizardPage page) {
98 page.removePageListener(pageListener);
99 pages.remove(page);
100 }
101
102 public void initialize(RequestContext context) throws Exception {
103 super.initialize(context);
104 setCurrentPageIndex(0);
105 }
106
107 public Document render(RequestContext context) throws Exception {
108 return current.render(context);
109 }
110
111 private void adjustVisibility() {
112 int pageCnt = pages.size();
113 for(int i=0; i<pageCnt; i++) {
114 WizardPage p = (WizardPage) pages.get(i);
115 p.setVisible(p==current && this.isVisible());
116 }
117 }
118
119 public WizardPage getPage(int idx) {
120 return (WizardPage) pages.get(idx);
121 }
122
123 } |
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