SearchBar JComboBox

• download example.jar
• download src.zip
• repository

Code

public class BasicSearchBarComboBoxUI extends SearchBarComboBoxUI {
  protected boolean isEditable = true;
  public static javax.swing.plaf.ComponentUI createUI(JComponent c) {
    return new BasicSearchBarComboBoxUI();
  }

  @Override protected void installDefaults() {
    super.installDefaults();
    // comboBox.setEditable(true);
    comboBox.putClientProperty("JComboBox.isTableCellEditor", Boolean.TRUE);
    // comboBox.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
  }

  @Override protected LayoutManager createLayoutManager() {
    return new LayoutManager() {
      @Override public void addLayoutComponent(String name, Component comp) {
        /* not needed */
      }

      @Override public void removeLayoutComponent(Component comp) {
        /* not needed */
      }

      @Override public Dimension preferredLayoutSize(Container parent) {
        return parent.getPreferredSize();
      }

      @Override public Dimension minimumLayoutSize(Container parent) {
        return parent.getMinimumSize();
      }

      @Override public void layoutContainer(Container parent) {
        if (!(parent instanceof JComboBox)) {
          return;
        }
        JComboBox<?> cb = (JComboBox<?>) parent;
        Rectangle r = SwingUtilities.calculateInnerArea(cb, null);

        int arrowSize = 0;
        JButton arrowButton = (JButton) cb.getComponent(0);
        if (Objects.nonNull(arrowButton)) {
          Insets arrowInsets = arrowButton.getInsets();
          int bw = arrowButton.getPreferredSize().width + arrowInsets.left + arrowInsets.right;
          arrowButton.setBounds(r.x, r.y, bw, r.height);
          arrowSize = bw;
        }
        JButton loupeButton = null;
        for (Component c : cb.getComponents()) {
          if ("ComboBox.loupeButton".equals(c.getName())) {
            loupeButton = (JButton) c;
            break;
          }
        }
        int loupeSize = 0;
        if (Objects.nonNull(loupeButton)) {
          loupeSize = r.height;
          loupeButton.setBounds(r.x + r.width - loupeSize, r.y, loupeSize, r.height);
        }
        JTextField editor = (JTextField) cb.getEditor().getEditorComponent();
        if (Objects.nonNull(editor)) {
          editor.setBounds(r.x + arrowSize, r.y, r.width - arrowSize - loupeSize, r.height);
        }
      }
    };
  }
  // ...

References

• SearchBar JComboBox(Japanese)