public void unregisterKeyStroke(KeyStroke ks, JComponent c) {
// component may have already been removed from the hierarchy, we
// need to look up the container using the componentKeyStrokeMap.
ComponentKeyStrokePair ckp = new ComponentKeyStrokePair(c, ks);
Container topContainer = componentKeyStrokeMap.get(ckp);
if (topContainer == null) { // never heard of this pairing, so bail
return;
}
Hashtable keyMap = containerMap.get(topContainer);
if (keyMap == null) { // this should never happen, but I'm being safe
Thread.dumpStack();
return;
}
Object tmp = keyMap.get(ks);
if (tmp == null) { // this should never happen, but I'm being safe
Thread.dumpStack();
return;
}
if (tmp instanceof JComponent && tmp == c) {
keyMap.remove(ks); // remove the KeyStroke from the Map
// System.out.println("removed a stroke" + ks);
} else if (tmp
instanceof Vector) { // this means there is more than one component reg for this key
Vector v = (Vector) tmp;
v.removeElement(c);
if (v.isEmpty()) {
keyMap.remove(ks); // remove the KeyStroke from the Map
// System.out.println("removed a ks vector");
}
}
if (keyMap.isEmpty()) { // if no more bindings in this table
containerMap.remove(topContainer); // remove table to enable GC
// System.out.println("removed a container");
}
componentKeyStrokeMap.remove(ckp);
// Check for EmbeddedFrame case, they know how to process accelerators even
// when focus is not in Java
if (topContainer instanceof EmbeddedFrame) {
((EmbeddedFrame) topContainer).unregisterAccelerator(ks);
}
}
