Disable Right Click In JComboBox-Dropdown-List

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

Code

class BasicComboPopup2 extends BasicComboPopup {
  private Handler2 handler2;
  @Override
  public void uninstallingUI() {
    super.uninstallingUI();
    handler2 = null;
  }
  public BasicComboPopup2(JComboBox combo) {
    super(combo);
  }
  protected MouseListener createListMouseListener() {
    if(handler2==null) handler2 = new Handler2();
    return handler2;
  }
  private class Handler2 implements MouseListener{
    public void mouseEntered(MouseEvent e) {}
    public void mouseExited(MouseEvent e)  {}
    public void mouseClicked(MouseEvent e) {}
    public void mousePressed(MouseEvent e) {}
    public void mouseReleased(MouseEvent e) {
      if(e.getSource() == list) {
        if(list.getModel().getSize() > 0) {
          if(!SwingUtilities.isLeftMouseButton(e) || !comboBox.isEnabled()) return; // <-- ins
          // JList mouse listener
          if(comboBox.getSelectedIndex() == list.getSelectedIndex()) {
            comboBox.getEditor().setItem(list.getSelectedValue());
          }
          comboBox.setSelectedIndex(list.getSelectedIndex());
        }
        comboBox.setPopupVisible(false);
        // workaround for cancelling an edited item (bug 4530953)
        if(comboBox.isEditable() && comboBox.getEditor() != null) {
          comboBox.configureEditor(comboBox.getEditor(), comboBox.getSelectedItem());
        }
      }
    }
  }
}

References

• Disable Right Click In JComboBox-Dropdown-List(Japanese)

New Tab Button

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

Code

class TabLayout implements LayoutManager, java.io.Serializable {
  public void addLayoutComponent(String name, Component comp) {}
  public void removeLayoutComponent(Component comp) {}
  public Dimension preferredLayoutSize(Container parent) {
    synchronized (parent.getTreeLock()) {
      Insets insets = parent.getInsets();
      int last = parent.getComponentCount()-1;
      int w = 0, h = 0;
      if(last >= 0) {
        Component comp = parent.getComponent(last);
        Dimension d = comp.getPreferredSize();
        w = d.width;
        h = d.height;
      }
      return new Dimension(insets.left + insets.right + w,
                           insets.top + insets.bottom + h);
    }
  }

  public Dimension minimumLayoutSize(Container parent) {
    synchronized (parent.getTreeLock()) {
      return new Dimension(100, 24);
    }
  }

  public void layoutContainer(Container parent) {
    synchronized (parent.getTreeLock()) {
      Insets insets = parent.getInsets();
      int ncomponents = parent.getComponentCount();
      int nrows = 1;
      int ncols = ncomponents-1;
      //boolean ltr = parent.getComponentOrientation().isLeftToRight();

      if (ncomponents == 0) {
        return;
      }
      int lastw = parent.getComponent(ncomponents-1).getPreferredSize().width;
      int width = parent.getWidth() - (insets.left + insets.right) - lastw;
      int h = parent.getHeight() - (insets.top + insets.bottom);
      int w = (width > 100*(ncomponents-1))?100:width/ncols;
      int gap = width - w*ncols;
      int x = insets.left;
      int y = insets.top;
      for (int i=0;i < ncomponents;i++) {
        int a = (gap > 0)?1:0;
        gap--;
        int cw = (i==ncols)?lastw:w+a;
        parent.getComponent(i).setBounds(x, y, cw, h);
        x += w + a;
      }
    }
  }
  public String toString() {
    return getClass().getName();
  }
}

References

• XP Style Icons - Windows Application Icon, Software XP Icons
• New Tab Button(Japanese)

Color JComboBox

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

Code

combo01.setModel(makeModel());
combo01.setRenderer(new MyListCellRenderer(combo01.getRenderer()));
combo01.addItemListener(new ItemListener() {
  public void itemStateChanged(ItemEvent e) {
    if(e.getStateChange()!=ItemEvent.SELECTED) return;
    combo01.setBackground(getOEColor(combo01.getSelectedIndex()));
  }
});
combo01.setSelectedIndex(0);
combo01.setBackground(evenBGColor);

final JTextField field = (JTextField) combo02.getEditor().getEditorComponent();
field.setOpaque(true);
field.setBackground(evenBGColor);
combo02.setEditable(true);
combo02.setModel(makeModel());
combo02.setRenderer(new MyListCellRenderer(combo02.getRenderer()));
combo02.addItemListener(new ItemListener() {
  public void itemStateChanged(ItemEvent e) {
    if(e.getStateChange()!=ItemEvent.SELECTED) return;
    field.setBackground(getOEColor(combo02.getSelectedIndex()));
  }
});
combo02.setSelectedIndex(0);

References

• Color JComboBox(Japanese)