@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 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 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));
}
}
}
@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;
}
private static void listRepaint(JList list, Rectangle rect) {
if (Objects.nonNull(rect)) {
list.repaint(rect);
}
}
