Cannot remove Bindings from InputMap

Question

Hi all,
i'm very frustrated, because for days i try to change the default behaviour of a Borland jdbTextField, which extends JTextField with no success.
First i elicited that the keys i wanted to remove are part of the parent of the InputMap of the jdbTextField.
I want to remove the bindings for the following two keyStrokes:
KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0)
KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_UP, 0)
Since both keys are elements of
jdbTextField.getInputMap(JComponent.WHEN_FOCUSED).getParent().keys()
I was shure i could do
jdbTextField.getInputMap(JComponent.WHEN_FOCUSED).getParent()
.remove( KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0) )
and respectively
.remove( KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_UP, 0) )
but this didn't change anything.
The .getParent().keys().length is still 6 - before and after the removings.
In a next step i tried to replace the 6 entries holding InputMap with a 4 entries holding InputMap by putting all keyStroke/Object - pairs ecept those for VK_PAGE_DOWN and VK_PAGE_UP to a newly created InputMap-Object.
The creation of the new InputMap:
int i;
InputMap parentsParent,
globalDefaultJdbTextFieldInputMapParent ,
globalJdbTextFieldInputMapParent;
KeyStroke[] dataSetKeys;
globalDefaultJdbTextFieldInputMapParent = jdbTextField
.getInputMap(JComponent.WHEN_FOCUSED).getParent();
if (globalDefaultJdbTextFieldInputMapParent != null) {
dataSetKeys = globalDefaultJdbTextFieldInputMapParent.keys();
for (i = dataSetKeys.length - 1; i >= 0; i--) {
if ( (dataSetKeys.getKeyCode() != KeyEvent.VK_PAGE_DOWN)
&& (dataSetKeys[i].getKeyCode() != KeyEvent.VK_PAGE_UP)) {
if (globalDefaultJdbTextFieldInputMapParent
.get(dataSetKeys[i]) != null) {
globalJdbTextFieldInputMapParent
.put(dataSetKeys[i], globalDefaultJdbTextFieldInputMapParent
.get(dataSetKeys[i]));
System.out.println("One InputMapping added: " +
globalDefaultJdbTextFieldInputMapParent
.get(dataSetKeys[i]).toString());
The newly created InputMap has four entries!
And then i replaced the Parent-InputMap and the Parents Parent-InputMap like this:
parentsParent = jdbTextField.getInputMap(JComponent.WHEN_FOCUSED).getParent().getParent();
jdbTextField.getInputMap(JComponent.WHEN_FOCUSED).setParent(
globalJdbTextFieldInputMapParent);
jdbTextField.getInputMap(JComponent.WHEN_FOCUSED).getParent().setParent(parentsParent);
After this action i could no longer input any keystrokes in those fields i replaced the parent-InputMap.
I could only click into the field, but thats all. Nothing else.
>>>>>>>>>>>>>>>>>>
I searched the newsgroups and found some articles and did the proposed actions, what means not trying to remove a keystroke but leaving the parent-InputMaps as they are and adding keys with null action to the Components InputMap.
I tried this:
InputMap im;
im = jdbTextField.getInputMap(JComponent.WHEN_FOCUSED);
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0), "Nothing - P");
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_UP, 0), "Nothing - P");
jdbTextField.getActionMap().put( "Nothing - P", null);
With this solution i am able to populate the textField with data, but there is still the default behaviour of the VK_PAGE_UP and _DOWN - Keys.
CAN ANYONE PLEASE EXPLAIN WHY THIS F... DOESN'T WORK?
And what to do to remove the default Bindings?
TIA,
Richard

Answer 1

o.k., after your first advice i tried the following:
if ( jdbTextField.getInputMap(JComponent.WHEN_FOCUSED)
.get(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0)) != null){
System.out.println("WHEN_FOCUSED");
} else
if ( jdbTextField.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
.get(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0)) != null){
System.out.println("WHEN_ANCESTOR_OF_FOCUSED_COMPONENT");
} else
if ( jdbTextField.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW)
.get(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0)) != null){
System.out.println("WHEN_IN_FOCUSED_WINDOW");
} else
if ( jdbTextField.getInputMap(JComponent.WHEN_FOCUSED).getParent()
.get(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0)) != null){
System.out.println("WHEN_FOCUSED in Parent");
} else
if ( jdbTextField.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).getParent() != null){
if ( jdbTextField.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).getParent()
.get(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0)) != null){
System.out.println("WHEN_ANCESTOR_OF_FOCUSED_COMPONENT in Parent");
} else
if ( jdbTextField.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).getParent() != null){
if ( jdbTextField.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).getParent()
.get(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0)) != null){
System.out.println("WHEN_IN_FOCUSED_WINDOW in Parent");
And - as if you smelled it - there was no response!
The get - method of all the InputMaps of any condition always returns null!!!
So, that is a bad bug, i think:
While inputMap.keys() returns an array of KeyStroke's,
neither inputMap.get( inputMap.keys()[x] )
nor inputMap.remove( inputMap.keys()[x] )
does anything or returns any from null different value.
The question here is:
Why does a KeyStroke[] - Array is returned, while the InputMaps internal property arrayTable is null?????????????????????
This must be a bug.
Next i'll try what you postet about the UI ....
Thanks so far, you'll hear from me ...
TIA,
Richard