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1 package org.sapia.gumby.view.binding;
2
3 import java.util.ArrayList  ;
4 import java.util.Collection ;
5 import java.util.Iterator ;
6
7 import javax.swing.JComboBox ;
8
9 import org.apache.commons.jxpath.JXPathContext;
10 import org.sapia.gumby.view.View;
11
12
27 public class ComboBinding extends AbstractJXPathBinding {
28
29 private Collection _options;
30
31 public void onBound(View owner, Object model) {
32 JComboBox list = (JComboBox ) acquireWidget(owner);
33 list.removeAllItems();
34 initList(list, model);
35 }
36
37 public void onChanged(View owner, Object model) {
38 JComboBox list = (JComboBox ) acquireWidget(owner);
39 initList(list, model);
40 }
41
42 public void onUpdated(View owner, Object model) {
43 JComboBox list = (JComboBox ) acquireWidget(owner);
44 list.removeAllItems();
45 initList(list, model);
46 }
47
48 public void updateModel(View owner, Object model) {
49 JXPathContext ctx = JXPathContext.newContext(model);
50 ctx.setLenient(true);
51 JComboBox list = (JComboBox ) acquireWidget(owner);
52 if(list.getSelectedIndex() >= 0) {
53 _expr.setValue(ctx, list.getSelectedItem());
54 }
55 }
56
57 public void setOptions(Collection options) {
58 _options = options;
59 }
60
61 public void addOption(Object option) {
62 if(_options == null) {
63 _options = new ArrayList ();
64 }
65 _options.add(option);
66 }
67
68 private void initList(JComboBox comp, Object model) {
69 JXPathContext ctx = JXPathContext.newContext(model);
70 ctx.setLenient(true);
71 Object value = _expr.getValue(ctx);
72 if(value != null) {
73 if(_options != null) {
74 Iterator options = _options.iterator();
75 int count = 0;
76 while(options.hasNext()) {
77 Object current = options.next();
78 comp.addItem(value);
79 if(current.equals(value)) {
80 comp.setSelectedIndex(count);
81 }
82 count++;
83 }
84 }
85 } else {
86 Iterator options = _options.iterator();
87 while(options.hasNext()) {
88 comp.addItem(options.next());
89 }
90 }
91 }
92 }
93 |
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