|
1
4 package org.wings;
5
6 import java.util.HashMap  ;
7 import java.util.Iterator ;
8 import java.util.Map ;
9
10
14 public class SScrollPaneLayout
15 extends SAbstractLayoutManager
16 {
17 public static final String VIEWPORT = "Viewport";
18 public static final String NORTH = SBorderLayout.NORTH;
19 public static final String WEST = SBorderLayout.WEST;
20 public static final String EAST = SBorderLayout.EAST;
21 public static final String SOUTH = SBorderLayout.SOUTH;
22
23 private SComponent viewport;
24 private SComponent north;
25 private SComponent west;
26 private SComponent east;
27 private SComponent south;
28
29 Map components = new HashMap (5);
30 private boolean paging = true;
31
32 public boolean isPaging() {
33 return paging;
34 }
35
36 public void setPaging(boolean paging) {
37 this.paging = paging;
38 }
39
40 public void addSingletonComponent(SComponent component, Object constraint) {
41 if (VIEWPORT.equals(constraint)) {
42 container.remove(viewport);
43 viewport = component;
44 }
45 else if (NORTH.equals(constraint)) {
46 container.remove(north);
47 north = component;
48 }
49 else if (WEST.equals(constraint)) {
50 container.remove(west);
51 west = component;
52 }
53 else if (EAST.equals(constraint)) {
54 container.remove(east);
55 east = component;
56 }
57 else if (SOUTH.equals(constraint)) {
58 container.remove(south);
59 south = component;
60 }
61 }
62
63 public void addComponent(SComponent component, Object constraint, int index) {
64 addSingletonComponent(component, constraint);
65 components.put(constraint, component);
66 }
67
68 public void removeComponent(SComponent c) {
69 if (c == null)
70 return;
71
72 String constraint = null;
73 Iterator iterator = components.entrySet().iterator();
74 while (iterator.hasNext()) {
75 Map.Entry entry = (Map.Entry ) iterator.next();
76 if (c.equals(entry.getValue())) {
77 constraint = (String ) entry.getKey();
78 break;
79 }
80 }
81
82 if (constraint != null) {
83 components.remove(constraint);
84 removeSingletonComponent(constraint);
85 }
86 }
87
88 private void removeSingletonComponent(String constraint) {
89 if (VIEWPORT.equals(constraint)) {
90 viewport = null;
91 }
92 else if (NORTH.equals(constraint)) {
93 north = null;
94 }
95 else if (WEST.equals(constraint)) {
96 west = null;
97 }
98 else if (EAST.equals(constraint)) {
99 east = null;
100 }
101 else if (SOUTH.equals(constraint)) {
102 south = null;
103 }
104 }
105
106 public Map getComponents() {
107 return components;
108 }
109 }
110 |
Popular Tags |
Java API By Example, From Geeks To Geeks.