public void layoutContainer(Container parent) {
JComboBox cb = (JComboBox) parent;
// Use superclass behavior if the combobox is not editable.
if (!cb.isEditable()) {
super.layoutContainer(parent);
return;
}
int width = cb.getWidth();
int height = cb.getHeight();
Insets insets = getInsets();
int buttonWidth = getEditableButtonWidth();
int buttonHeight = height - (insets.top + insets.bottom);
if (arrowButton != null) {
if (cb.getComponentOrientation().isLeftToRight()) {
arrowButton.setBounds(
width - (insets.right + buttonWidth), insets.top, buttonWidth, buttonHeight);
} else {
arrowButton.setBounds(insets.left, insets.top, buttonWidth, buttonHeight);
}
}
if (editor != null) {
editor.setBounds(rectangleForCurrentValue());
}
}
private static int getComboBoxBaselineResizeBehavior(JComboBox cb) {
if (cb.isEditable()) {
return getBaselineResizeBehavior(cb.getEditor().getEditorComponent());
}
ListCellRenderer renderer = cb.getRenderer();
if (renderer == null) {
if (brbListCellRenderer == null) {
brbListCellRenderer = new DefaultListCellRenderer();
}
renderer = brbListCellRenderer;
}
Object value = null;
Object prototypeValue = cb.getPrototypeDisplayValue();
if (prototypeValue != null) {
value = prototypeValue;
} else if (cb.getModel().getSize() > 0) {
value = cb.getModel().getElementAt(0);
}
if (value != null) {
if (brbList == null) {
brbList = new JList();
}
Component component = renderer.getListCellRendererComponent(brbList, value, -1, false, false);
return getBaselineResizeBehavior(component);
}
return BRB_OTHER;
}
@Override
public void keyPressed(KeyEvent evt) {
if (evt.isConsumed()) return;
Component comp = getFocusOwner();
if (evt.getKeyCode() == KeyEvent.VK_ENTER && enterEnabled) {
while (comp != null) {
if (comp instanceof JComboBox) {
JComboBox<?> combo = (JComboBox<?>) comp;
if (combo.isEditable()) {
Object selected = combo.getEditor().getItem();
if (selected != null) combo.setSelectedItem(selected);
}
if (combo.isPopupVisible()) {
evt.consume();
combo.setPopupVisible(false);
}
return;
}
// TODO: add other classes that need custom key handling here.
comp = comp.getParent();
}
evt.consume();
ok();
} else if (evt.getKeyCode() == KeyEvent.VK_ESCAPE || isCloseBufferShortcut(evt)) {
evt.consume();
if (comp instanceof JComboBox) {
JComboBox<?> combo = (JComboBox<?>) comp;
if (combo.isPopupVisible()) combo.setPopupVisible(false);
else cancel();
} else cancel();
}
}
private static int getComboBoxBaseline(JComboBox combobox, int height) {
Insets insets = combobox.getInsets();
int y = insets.top;
height -= (insets.top + insets.bottom);
if (combobox.isEditable()) {
ComboBoxEditor editor = combobox.getEditor();
if (editor != null && (editor.getEditorComponent() instanceof JTextField)) {
JTextField tf = (JTextField) editor.getEditorComponent();
return y + getSingleLineTextBaseline(tf, height);
}
}
// Use the renderer to calculate baseline
if (isMetal()) {
if (isOceanTheme()) {
y += 2;
height -= 4;
}
} else if (isWindows()) {
// This doesn't guarantee an XP style will be active,
// but we don't offer public API to detect if XP is active.
String osVersion = System.getProperty("os.version");
if (osVersion != null) {
Float version = Float.valueOf(osVersion);
if (version.floatValue() > 4.0) {
y += 2;
height -= 4;
}
}
}
ListCellRenderer renderer = combobox.getRenderer();
if (renderer instanceof JLabel) {
int baseline = y + getLabelBaseline((JLabel) renderer, height);
if (isAqua()) {
return baseline - 1;
}
return baseline;
}
// Renderer isn't a label, use metrics directly.
FontMetrics fm = combobox.getFontMetrics(combobox.getFont());
return y + fm.getAscent();
}
