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);
}
}
final void disableTrueDoubleBuffering() {
if (useTrueDoubleBuffering) {
if (!IGNORE_DISABLE_TRUE_DOUBLE_BUFFERING) {
if (LOG_DISABLE_TRUE_DOUBLE_BUFFERING) {
System.out.println("Disabling true double buffering for " + this);
Thread.dumpStack();
}
useTrueDoubleBuffering = false;
RepaintManager.currentManager(this).doubleBufferingChanged(this);
}
}
}
/**
* register keystrokes here which are for the WHEN_IN_FOCUSED_WINDOW case. Other types of
* keystrokes will be handled by walking the hierarchy That simplifies some potentially hairy
* stuff.
*/
public void registerKeyStroke(KeyStroke k, JComponent c) {
Container topContainer = getTopAncestor(c);
if (topContainer == null) {
return;
}
Hashtable keyMap = containerMap.get(topContainer);
if (keyMap == null) { // lazy evaluate one
keyMap = registerNewTopContainer(topContainer);
}
Object tmp = keyMap.get(k);
if (tmp == null) {
keyMap.put(k, c);
} else if (tmp instanceof Vector) { // if there's a Vector there then add to it.
Vector v = (Vector) tmp;
if (!v.contains(c)) { // only add if this keystroke isn't registered for this component
v.addElement(c);
}
} else if (tmp instanceof JComponent) {
// if a JComponent is there then remove it and replace it with a vector
// Then add the old compoennt and the new compoent to the vector
// then insert the vector in the table
if (tmp != c) { // this means this is already registered for this component, no need to dup
Vector<JComponent> v = new Vector<JComponent>();
v.addElement((JComponent) tmp);
v.addElement(c);
keyMap.put(k, v);
}
} else {
System.out.println("Unexpected condition in registerKeyStroke");
Thread.dumpStack();
}
componentKeyStrokeMap.put(new ComponentKeyStrokePair(c, k), topContainer);
// Check for EmbeddedFrame case, they know how to process accelerators even
// when focus is not in Java
if (topContainer instanceof EmbeddedFrame) {
((EmbeddedFrame) topContainer).registerAccelerator(k);
}
}
/**
* This method is called when the focused component (and none of its ancestors) want the key
* event. This will look up the keystroke to see if any chidren (or subchildren) of the specified
* container want a crack at the event. If one of them wants it, then it will "DO-THE-RIGHT-THING"
*/
public boolean fireKeyboardAction(KeyEvent e, boolean pressed, Container topAncestor) {
if (e.isConsumed()) {
System.out.println("Acquired pre-used event!");
Thread.dumpStack();
}
// There may be two keystrokes associated with a low-level key event;
// in this case a keystroke made of an extended key code has a priority.
KeyStroke ks;
KeyStroke ksE = null;
if (e.getID() == KeyEvent.KEY_TYPED) {
ks = KeyStroke.getKeyStroke(e.getKeyChar());
} else {
if (e.getKeyCode() != e.getExtendedKeyCode()) {
ksE = KeyStroke.getKeyStroke(e.getExtendedKeyCode(), e.getModifiers(), !pressed);
}
ks = KeyStroke.getKeyStroke(e.getKeyCode(), e.getModifiers(), !pressed);
}
Hashtable keyMap = containerMap.get(topAncestor);
if (keyMap != null) { // this container isn't registered, so bail
Object tmp = null;
// extended code has priority
if (ksE != null) {
tmp = keyMap.get(ksE);
if (tmp != null) {
ks = ksE;
}
}
if (tmp == null) {
tmp = keyMap.get(ks);
}
if (tmp == null) {
// don't do anything
} else if (tmp instanceof JComponent) {
JComponent c = (JComponent) tmp;
if (c.isShowing() && c.isEnabled()) { // only give it out if enabled and visible
fireBinding(c, ks, e, pressed);
}
} else if (tmp instanceof Vector) { // more than one comp registered for this
Vector v = (Vector) tmp;
// There is no well defined order for WHEN_IN_FOCUSED_WINDOW
// bindings, but we give precedence to those bindings just
// added. This is done so that JMenus WHEN_IN_FOCUSED_WINDOW
// bindings are accessed before those of the JRootPane (they
// both have a WHEN_IN_FOCUSED_WINDOW binding for enter).
for (int counter = v.size() - 1; counter >= 0; counter--) {
JComponent c = (JComponent) v.elementAt(counter);
// System.out.println("Trying collision: " + c + " vector = "+ v.size());
if (c.isShowing() && c.isEnabled()) { // don't want to give these out
fireBinding(c, ks, e, pressed);
if (e.isConsumed()) return true;
}
}
} else {
System.out.println("Unexpected condition in fireKeyboardAction " + tmp);
// This means that tmp wasn't null, a JComponent, or a Vector. What is it?
Thread.dumpStack();
}
}
if (e.isConsumed()) {
return true;
}
// if no one else handled it, then give the menus a crack
// The're handled differently. The key is to let any JMenuBars
// process the event
if (keyMap != null) {
Vector v = (Vector) keyMap.get(JMenuBar.class);
if (v != null) {
Enumeration iter = v.elements();
while (iter.hasMoreElements()) {
JMenuBar mb = (JMenuBar) iter.nextElement();
if (mb.isShowing() && mb.isEnabled()) { // don't want to give these out
boolean extended = (ksE != null) && !ksE.equals(ks);
if (extended) {
fireBinding(mb, ksE, e, pressed);
}
if (!extended || !e.isConsumed()) {
fireBinding(mb, ks, e, pressed);
}
if (e.isConsumed()) {
return true;
}
}
}
}
}
return e.isConsumed();
}