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1
31
32 package org.antlr.xjlib.appkit.gview.event;
33
34 import org.antlr.xjlib.appkit.gview.object.GElement;
35
36 import java.awt.*;
37 import java.awt.event.MouseEvent  ;
38 import java.util.*;
39 import java.util.List ;
40
41 public class GEventManager {
42
43 private List <GAbstractEvent> eventObjects = new ArrayList<GAbstractEvent>();
44 private Set exclusiveValueSet = new HashSet();
45 private GEventDelegate eventDelegate = null;
46
47 public static final int EVENT_DRAW = 1;
48 public static final int EVENT_MOUSE_PRESSED = 2;
49 public static final int EVENT_MOUSE_RELEASED = 3;
50 public static final int EVENT_MOUSE_DRAGGED = 4;
51 public static final int EVENT_MOUSE_MOVED = 5;
52
53 public static final Integer EXCLUSIVE_DRAG_VALUE = new Integer (99);
54 public static final Integer EXCLUSIVE_CREATE_LINK_VALUE = new Integer (100);
55
56 public GEventManager(GEventDelegate delegate) {
57 this.eventDelegate = delegate;
58 }
59
60 public void add(GAbstractEvent event) {
61 event.setManager(this);
62 event.setDelegate(eventDelegate);
63 eventObjects.add(event);
64 }
65
66 public boolean canFocusOnElement(GElement element) {
67 Iterator<GAbstractEvent> iterator = eventObjects.iterator();
68 while(iterator.hasNext()) {
69 GAbstractEvent eventObject = iterator.next();
70 if(!eventObject.shouldFocusOnElement(element))
71 return false;
72 }
73 return true;
74 }
75
76 public void addExclusiveValue(Object value) {
77 exclusiveValueSet.add(value);
78 }
79
80 public void removeExclusiveValue(Object value) {
81 exclusiveValueSet.remove(value);
82 }
83
84 public boolean hasExclusiveValue(Object value) {
85 return exclusiveValueSet.contains(value);
86 }
87
88 public void performEventObjects(int action, Object event, Point mousePosition, Object param) {
89 Iterator<GAbstractEvent> iterator = eventObjects.iterator();
90 while(iterator.hasNext()) {
91 GAbstractEvent eventObject = iterator.next();
92 switch(action) {
93 case EVENT_DRAW:
94 eventObject.draw((Graphics)param);
95 break;
96 case EVENT_MOUSE_PRESSED:
97 eventObject.mousePressed((MouseEvent )event, mousePosition);
98 break;
99 case EVENT_MOUSE_RELEASED:
100 eventObject.mouseReleased((MouseEvent )event, mousePosition);
101 break;
102 case EVENT_MOUSE_DRAGGED:
103 eventObject.mouseDragged((MouseEvent )event, mousePosition);
104 break;
105 case EVENT_MOUSE_MOVED:
106 eventObject.mouseMoved((MouseEvent )event, mousePosition);
107 break;
108 }
109 }
110 }
111
112
113 }
114 |
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