public void keyReleased(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_BACK_SPACE || e.getKeyCode() == KeyEvent.VK_ENTER) {
String text = textEditor.getText();
if (comboBox.isShowing()) {
suggestionList.hide();
suggestionList.filter(text);
suggestionList.show();
}
}
}
private void processEnterPressed() {
Object value = suggestionList.getSelectedValue();
if (!allowsUserValues && value == null && suggestionList.getItemCount() > 0) {
value = suggestionList.getItemAt(0);
}
// reset the item (value == null) only if user values are not supported
if (value != null || !allowsUserValues) {
comboBox.setSelectedItem(value);
}
suggestionList.hide();
}
public void run() {
String text = textEditor.getText();
// need to hide first because Swing incorrectly updates popups (getSize() returns
// dimension not the same as seen on the screen)
suggestionList.hide();
if (comboBox.isShowing()) {
suggestionList.filter(text);
if (suggestionList.getItemCount() > 0) {
suggestionList.show();
}
}
}
private void handleNavigationKeys(boolean suggest, int next, int sel, int max) {
if (!suggest && !comboBox.isPopupVisible()) {
comboBox.setPopupVisible(true);
return;
}
if (comboBox.getItemCount() > 0) {
if (next < 0) {
next = 0;
}
if (next > max) {
next = max;
}
if (next != sel) {
if (suggest) {
suggestionList.setSelectedIndex(next);
} else {
comboBox.setPopupVisible(true);
comboBox.setSelectedIndex(next);
}
}
textEditor.requestFocus();
}
}
/**
* Calculates next selection row, according to a pressed key and selects it. This might affect
* either suggestion list or original popup
*/
private void handleKeyPressed(KeyEvent e) {
boolean suggest = suggestionList.isVisible();
if (suggest) {
processKeyPressedWhenSuggestionListIsVisible(e);
} else {
processKeyPressedWhenSuggestionListIsInvisible(e);
}
// scroll doesn't work in suggestionList..so we will scroll manually
suggestionListScrolling();
}
private void processKeyPressedWhenSuggestionListIsVisible(KeyEvent e) {
int sel = suggestionList.getSelectedIndex();
int max = suggestionList.getItemCount() - 1;
int next;
switch (e.getKeyCode()) {
case KeyEvent.VK_UP:
case KeyEvent.VK_NUMPAD8:
next = sel - 1;
break;
case KeyEvent.VK_DOWN:
case KeyEvent.VK_NUMPAD2:
next = sel + 1;
break;
case KeyEvent.VK_PAGE_UP:
next = sel - comboBox.getMaximumRowCount();
break;
case KeyEvent.VK_PAGE_DOWN:
next = sel + comboBox.getMaximumRowCount();
break;
case KeyEvent.VK_HOME:
next = 0;
break;
case KeyEvent.VK_END:
next = max;
break;
case KeyEvent.VK_ENTER:
processEnterPressed();
return;
case KeyEvent.VK_ESCAPE:
suggestionList.hide();
return;
default:
// invoke in end of AWT thread so that information in textEditor would update
SwingUtilities.invokeLater(this);
return;
}
e.consume();
handleNavigationKeys(true, next, sel, max);
}
public void focusLost(FocusEvent e) {
suggestionList.hide();
}
private void suggestionListScrolling() {
JList list = suggestionList.getList();
int selectedIndex = suggestionList.getSelectedIndex();
list.ensureIndexIsVisible(selectedIndex);
}
