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1
7 package java.awt;
8
9 import java.awt.event.*;
10
11 import sun.awt.AppContext;
12
13 abstract class ModalEventFilter implements EventFilter  {
14
15 protected Dialog modalDialog;
16 protected boolean disabled;
17
18 protected ModalEventFilter(Dialog modalDialog) {
19 this.modalDialog = modalDialog;
20 disabled = false;
21 }
22
23 Dialog getModalDialog() {
24 return modalDialog;
25 }
26
27 public FilterAction acceptEvent(AWTEvent event) {
28 if (disabled || !modalDialog.isVisible()) {
29 return FilterAction.ACCEPT;
30 }
31 int eventID = event.getID();
32 if ((eventID >= MouseEvent.MOUSE_FIRST &&
33 eventID <= MouseEvent.MOUSE_LAST) ||
34 (eventID >= ActionEvent.ACTION_FIRST &&
35 eventID <= ActionEvent.ACTION_LAST) ||
36 eventID == WindowEvent.WINDOW_CLOSING)
37 {
38 Object o = event.getSource();
39 if (o instanceof sun.awt.ModalExclude) {
40 } else if (o instanceof Component ) {
43 Component c = (Component )o;
44 while ((c != null) && !(c instanceof Window )) {
45 c = c.getParent_NoClientCode();
46 }
47 if (c != null) {
48 return acceptWindow((Window )c);
49 }
50 }
51 }
52 return FilterAction.ACCEPT;
53 }
54
55 protected abstract FilterAction acceptWindow(Window w);
56
57 void disable() {
63 disabled = true;
64 }
65
66 int compareTo(ModalEventFilter another) {
67 Dialog anotherDialog = another.getModalDialog();
68 Component c = modalDialog;
71 while (c != null) {
72 if (c == anotherDialog) {
73 return 1;
74 }
75 c = c.getParent_NoClientCode();
76 }
77 c = anotherDialog;
78 while (c != null) {
79 if (c == modalDialog) {
80 return -1;
81 }
82 c = c.getParent_NoClientCode();
83 }
84 Dialog blocker = modalDialog.getModalBlocker();
86 while (blocker != null) {
87 if (blocker == anotherDialog) {
88 return -1;
89 }
90 blocker = blocker.getModalBlocker();
91 }
92 blocker = anotherDialog.getModalBlocker();
93 while (blocker != null) {
94 if (blocker == modalDialog) {
95 return 1;
96 }
97 blocker = blocker.getModalBlocker();
98 }
99 return modalDialog.getModalityType().compareTo(anotherDialog.getModalityType());
101 }
102
103 static ModalEventFilter createFilterForDialog(Dialog modalDialog) {
104 switch (modalDialog.getModalityType()) {
105 case DOCUMENT_MODAL: return new DocumentModalEventFilter(modalDialog);
106 case APPLICATION_MODAL: return new ApplicationModalEventFilter(modalDialog);
107 case TOOLKIT_MODAL: return new ToolkitModalEventFilter(modalDialog);
108 }
109 return null;
110 }
111
112 private static class ToolkitModalEventFilter extends ModalEventFilter {
113
114 private AppContext appContext;
115
116 ToolkitModalEventFilter(Dialog modalDialog) {
117 super(modalDialog);
118 appContext = modalDialog.appContext;
119 }
120
121 protected FilterAction acceptWindow(Window w) {
122 if (w.isModalExcluded(Dialog.ModalExclusionType.TOOLKIT_EXCLUDE)) {
123 return FilterAction.ACCEPT;
124 }
125 if (w.appContext != appContext) {
126 return FilterAction.REJECT;
127 }
128 while (w != null) {
129 if (w == modalDialog) {
130 return FilterAction.ACCEPT_IMMEDIATELY;
131 }
132 w = w.getOwner();
133 }
134 return FilterAction.REJECT;
135 }
136 }
137
138 private static class ApplicationModalEventFilter extends ModalEventFilter {
139
140 private AppContext appContext;
141
142 ApplicationModalEventFilter(Dialog modalDialog) {
143 super(modalDialog);
144 appContext = modalDialog.appContext;
145 }
146
147 protected FilterAction acceptWindow(Window w) {
148 if (w.isModalExcluded(Dialog.ModalExclusionType.APPLICATION_EXCLUDE)) {
149 return FilterAction.ACCEPT;
150 }
151 if (w.appContext == appContext) {
152 while (w != null) {
153 if (w == modalDialog) {
154 return FilterAction.ACCEPT_IMMEDIATELY;
155 }
156 w = w.getOwner();
157 }
158 return FilterAction.REJECT;
159 }
160 return FilterAction.ACCEPT;
161 }
162 }
163
164 private static class DocumentModalEventFilter extends ModalEventFilter {
165
166 private Window documentRoot;
167
168 DocumentModalEventFilter(Dialog modalDialog) {
169 super(modalDialog);
170 documentRoot = modalDialog.getDocumentRoot();
171 }
172
173 protected FilterAction acceptWindow(Window w) {
174 if (w.isModalExcluded(Dialog.ModalExclusionType.APPLICATION_EXCLUDE)) {
177 Window w1 = modalDialog.getOwner();
178 while (w1 != null) {
179 if (w1 == w) {
180 return FilterAction.REJECT;
181 }
182 w1 = w1.getOwner();
183 }
184 return FilterAction.ACCEPT;
185 }
186 while (w != null) {
187 if (w == modalDialog) {
188 return FilterAction.ACCEPT_IMMEDIATELY;
189 }
190 if (w == documentRoot) {
191 return FilterAction.REJECT;
192 }
193 w = w.getOwner();
194 }
195 return FilterAction.ACCEPT;
196 }
197 }
198 }
199 |
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