public void mouseClicked(MouseEvent e) {
    if (cm != null) {
      if (cm.getMapSize() == 2 && e.getClickCount() == 1) {
        // invert color
        color = (color == 1) ? 0 : 1;
        chooser.setCurrentColor(color);
        mainWindow.setActiveEditorColor(color);

        if (chooser.isVisible()) {
          chooser.repaint();
        }
        this.repaint();
      } else if (e.getClickCount() % 2 == 0) {
        chooser.setVisible(true);
      }
    }
  }
 public void setChoosedColor(int color) {
   this.color = color;
   mainWindow.setActiveEditorColor(color);
   repaint();
 }