public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
// return immediately when selecting an item
if (selecting) {
return;
}
// insert the string into the document
super.insertString(offs, str, a);
// lookup and select a matching item
Object item = lookupItem(getText(0, getLength()));
if (item != null) {
setSelectedItem(item);
} else {
// keep old item selected if there is no match
item = comboBox.getSelectedItem();
// imitate no insert (later on offs will be incremented by str.length(): selection won't move
// forward)
offs = offs - str.length();
// provide feedback to the user that his input has been received but can not be accepted
comboBox
.getToolkit()
.beep(); // when available use: UIManager.getLookAndFeel().provideErrorFeedback(comboBox);
}
setText(item.toString());
// select the completed part
highlightCompletedText(offs + str.length());
}
public void remove(int offs, int len) throws BadLocationException {
// return immediately when selecting an item
if (selecting) {
return;
}
if (hitBackspace) {
// user hit backspace => move the selection backwards
// old item keeps being selected
if (offs > 0) {
if (hitBackspaceOnSelection) {
offs--;
}
} else {
// User hit backspace with the cursor positioned on the start => beep
comboBox.getToolkit().beep(); // when available use:
// UIManager.getLookAndFeel().provideErrorFeedback(comboBox);
}
highlightCompletedText(offs);
} else {
super.remove(offs, len);
}
}