/*
* Fires AccessibleActiveDescendant PropertyChangeEvent to notify listeners
* on the popup menu invoker that a popup list item has been selected
*/
private void fireActiveDescendant() {
if (JPopupMenu.this instanceof BasicComboPopup) {
// get the popup list
JList popupList = ((BasicComboPopup) JPopupMenu.this).getList();
if (popupList == null) {
return;
}
// get the first selected item
AccessibleContext ac = popupList.getAccessibleContext();
AccessibleSelection selection = ac.getAccessibleSelection();
if (selection == null) {
return;
}
Accessible a = selection.getAccessibleSelection(0);
if (a == null) {
return;
}
AccessibleContext selectedItem = a.getAccessibleContext();
// fire the event with the popup invoker as the source.
if (selectedItem != null && invoker != null) {
AccessibleContext invokerContext = invoker.getAccessibleContext();
if (invokerContext != null) {
// Check invokerContext because Component.getAccessibleContext
// returns null. Classes that extend Component are responsible
// for returning a non-null AccessibleContext.
invokerContext.firePropertyChange(
ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY, null, selectedItem);
}
}
}
}
@Override
public void mousePressed(MouseEvent e) {
JList list = (JList) e.getComponent();
Point pt = e.getPoint();
int index = list.locationToIndex(pt);
if (index >= 0) {
JButton button = getButton(list, pt, index);
if (Objects.nonNull(button)) {
listRepaint(list, list.getCellBounds(index, index));
}
}
}
@SuppressWarnings("unchecked")
private static JButton getButton(JList list, Point pt, int index) {
Container c =
(Container)
list.getCellRenderer().getListCellRendererComponent(list, "", index, false, false);
Rectangle r = list.getCellBounds(index, index);
c.setBounds(r);
// c.doLayout(); //may be needed for mone LayoutManager
pt.translate(-r.x, -r.y);
Component b = SwingUtilities.getDeepestComponentAt(c, pt.x, pt.y);
if (b instanceof JButton) {
return (JButton) b;
} else {
return null;
}
}
@Override
public void actionPerformed(ActionEvent e) {
MutableComboBoxModel m = (MutableComboBoxModel) list.getModel();
if (m.getSize() > 1) {
m.removeElementAt(index);
comboBox.showPopup();
}
}
@Override
public Component getListCellRendererComponent(
JList<? extends E> list, E value, int index, boolean isSelected, boolean cellHasFocus) {
label.setText(Objects.toString(value, ""));
this.list = list;
this.index = index;
if (isSelected) {
setBackground(list.getSelectionBackground());
label.setForeground(list.getSelectionForeground());
} else {
setBackground(index % 2 == 0 ? EVEN_COLOR : list.getBackground());
label.setForeground(list.getForeground());
}
MutableComboBoxModel m = (MutableComboBoxModel) list.getModel();
if (index < 0 || m.getSize() - 1 <= 0) {
setOpaque(false);
deleteButton.setVisible(false);
label.setForeground(list.getForeground());
} else {
boolean f = index == rolloverIndex;
setOpaque(true);
deleteButton.setVisible(true);
deleteButton.getModel().setRollover(f);
deleteButton.setForeground(f ? Color.WHITE : list.getForeground());
}
return this;
}
@Override
public void mouseMoved(MouseEvent e) {
JList list = (JList) e.getComponent();
Point pt = e.getPoint();
int index = list.locationToIndex(pt);
if (!list.getCellBounds(index, index).contains(pt)) {
if (prevIndex >= 0) {
Rectangle r = list.getCellBounds(prevIndex, prevIndex);
listRepaint(list, r);
}
index = -1;
prevButton = null;
return;
}
if (index >= 0) {
JButton button = getButton(list, pt, index);
ButtonsRenderer renderer = (ButtonsRenderer) list.getCellRenderer();
if (Objects.nonNull(button)) {
renderer.rolloverIndex = index;
if (!button.equals(prevButton)) {
Rectangle r = list.getCellBounds(prevIndex, index);
listRepaint(list, r);
}
} else {
renderer.rolloverIndex = -1;
Rectangle r = null;
if (prevIndex == index) {
if (prevIndex >= 0 && Objects.nonNull(prevButton)) {
r = list.getCellBounds(prevIndex, prevIndex);
}
} else {
r = list.getCellBounds(index, index);
}
listRepaint(list, r);
prevIndex = -1;
}
prevButton = button;
}
prevIndex = index;
}
@Override
public void updateUI() {
if (Objects.nonNull(cbml)) {
JList<?> list = getList();
if (Objects.nonNull(list)) {
list.removeMouseListener(cbml);
list.removeMouseMotionListener(cbml);
}
}
super.updateUI();
setRenderer(new ButtonsRenderer<E>(this));
JList<?> list = getList();
if (Objects.nonNull(list)) {
cbml = new CellButtonsMouseListener();
list.addMouseListener(cbml);
list.addMouseMotionListener(cbml);
}
}
@Override
public void mouseExited(MouseEvent e) {
JList list = (JList) e.getComponent();
ButtonsRenderer renderer = (ButtonsRenderer) list.getCellRenderer();
renderer.rolloverIndex = -1;
}
private static void listRepaint(JList list, Rectangle rect) {
if (Objects.nonNull(rect)) {
list.repaint(rect);
}
}