|
1
19
20 package org.netbeans.modules.versioning.system.cvss.ui.wizards;
21
22 import org.openide.WizardDescriptor;
23 import org.openide.WizardValidationException;
24 import org.openide.ErrorManager;
25 import org.openide.util.HelpCtx;
26
27 import javax.swing.*;
28 import javax.swing.event.ChangeEvent  ;
29 import javax.swing.event.ChangeListener ;
30 import java.util.List ;
31 import java.util.LinkedList ;
32 import java.util.ArrayList ;
33 import java.util.Iterator ;
34 import java.awt.*;
35
36
45 public abstract class AbstractStep implements WizardDescriptor.ValidatingPanel {
46
47 private List listeners = new LinkedList ();
48 private boolean valid;
49 private JComponent panel;
50 private volatile boolean underConstruction;
51 private String errorMessage;
52 private boolean applyStandaloneLayout;
53
54
57 public void applyStandaloneLayout() {
58 applyStandaloneLayout = true;
59 }
60
61
65 public final synchronized Component getComponent() {
66 if (panel == null) {
67 try {
68 underConstruction = true;
69 panel = createComponent();
70 HelpCtx.setHelpIDString(panel, getClass().getName());
71 if (applyStandaloneLayout == false) {
72 JTextArea template = new JTextArea();
73 template.setColumns(60);
74 template.setRows(25);
75 panel.setPreferredSize(template.getPreferredSize());
76 }
77 } catch (RuntimeException ex) {
78 ErrorManager.getDefault().notify(ex);
79 } finally {
80 assert panel != null;
81 underConstruction = false;
82 fireChange();
83 }
84 }
85 return panel;
86 }
87
88
91 protected abstract JComponent createComponent();
92
93 public HelpCtx getHelp() {
94 return null;
95 }
96
97 public void readSettings(Object settings) {
98 }
99
100 public void storeSettings(Object settings) {
101 }
102
103 protected final void valid() {
104 setValid(true, null);
105 }
106
107
111 protected final void valid(String extErrorMessage) {
112 setValid(true, extErrorMessage);
113 }
114
115 protected final void invalid(String message) {
116 setValid(false, message);
117 }
118
119 public final boolean isValid() {
120 return valid;
121 }
122
123 public final String getErrorMessage() {
124 return errorMessage;
125 }
126
127 public final void validate () throws WizardValidationException {
129 validateBeforeNext();
130 if (isValid() == false || errorMessage != null) {
131 throw new WizardValidationException (
132 panel,
133 errorMessage,
134 errorMessage
135 );
136 }
137 }
138
139
143 protected abstract void validateBeforeNext();
144
145 public final void addChangeListener(ChangeListener l) {
146 synchronized(listeners) {
147 listeners.add(l);
148 }
149 }
150
151 public final void removeChangeListener(ChangeListener l) {
152 synchronized(listeners) {
153 listeners.remove(l);
154 }
155 }
156
157 private void setValid(boolean valid, String errorMessage) {
158 boolean fire = AbstractStep.this.valid != valid;
159 fire |= errorMessage != null && (errorMessage.equals(this.errorMessage) == false);
160 AbstractStep.this.valid = valid;
161 this.errorMessage = errorMessage;
162 if (fire) {
163 fireChange();
164 }
165 }
166
167 private void fireChange() {
168 if (underConstruction) return;
169 List clone;
170 synchronized(listeners) {
171 clone = new ArrayList (listeners);
172 }
173 Iterator it = clone.iterator();
174 ChangeEvent event = new ChangeEvent (this);
175 while (it.hasNext()) {
176 ChangeListener listener = (ChangeListener ) it.next();
177 listener.stateChanged(event);
178 }
179 }
180
181 }
182 |
Popular Tags |
Java API By Example, From Geeks To Geeks.