100 /**
101 * Unregisters the specified component.
102 */
103 synchronized static void unregister(JComponent c) {
104 for (int counter = components.size() - 1; counter >= 0; counter--) {
105 // Search for the component, removing any flushed references
106 // along the way.
107 JComponent target = components.get(counter).get();
108
109 if (target == c || target == null) {
110 components.remove(counter);
111 }
112 }
113 }
114
115 /**
116 * Finds a previously registered component of class <code>target</code>
117 * that shares the JRootPane ancestor of <code>from</code>.
118 */
119 synchronized static Object findRegisteredComponentOfType(JComponent from,
120 Class target) {
121 JRootPane rp = SwingUtilities.getRootPane(from);
122 if (rp != null) {
123 for (int counter = components.size() - 1; counter >= 0; counter--){
124 Object component = ((WeakReference)components.get(counter)).
125 get();
126
127 if (component == null) {
128 // WeakReference has gone away, remove the WeakReference
129 components.remove(counter);
130 }
131 else if (target.isInstance(component) && SwingUtilities.
132 getRootPane((Component)component) == rp) {
133 return component;
134 }
135 }
136 }
137 return null;
138 }
139
140 /**
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100 /**
101 * Unregisters the specified component.
102 */
103 synchronized static void unregister(JComponent c) {
104 for (int counter = components.size() - 1; counter >= 0; counter--) {
105 // Search for the component, removing any flushed references
106 // along the way.
107 JComponent target = components.get(counter).get();
108
109 if (target == c || target == null) {
110 components.remove(counter);
111 }
112 }
113 }
114
115 /**
116 * Finds a previously registered component of class <code>target</code>
117 * that shares the JRootPane ancestor of <code>from</code>.
118 */
119 synchronized static Object findRegisteredComponentOfType(JComponent from,
120 Class<?> target) {
121 JRootPane rp = SwingUtilities.getRootPane(from);
122 if (rp != null) {
123 for (int counter = components.size() - 1; counter >= 0; counter--){
124 Object component = ((WeakReference)components.get(counter)).
125 get();
126
127 if (component == null) {
128 // WeakReference has gone away, remove the WeakReference
129 components.remove(counter);
130 }
131 else if (target.isInstance(component) && SwingUtilities.
132 getRootPane((Component)component) == rp) {
133 return component;
134 }
135 }
136 }
137 return null;
138 }
139
140 /**
|