content: package ch.uzh.ifi.attempto.echocomp;
  
  import nextapp.echo.app.Button;
  import nextapp.echo.app.event.ActionListener;
  
  /**
   * This class represents a small square button with one of the following predefined icons: right,
   * down, plus, diamond.
   * 
   * @author Tobias Kuhn
   */
  public class SquareButton extends Button {
  	
  	private static final long serialVersionUID = -3555338733759467195L;
  	
  	private static final String imgpath = "ch/uzh/ifi/attempto/echocomp/style/";
  
  	/**
  	 * Creates a new square button.
  	 * 
  	 * @param iconName The name of the icon button.
  	 * @param tooltip The tooltip to be shown.
  	 * @param actionListener The action listener.
  	 */
  	public SquareButton(String iconName, String tooltip, ActionListener actionListener) {
  		setRolloverEnabled(true);
  		setRolloverBackground(Style.lightBackground);
  		if (tooltip != null) {
  			setToolTipText(tooltip);
  		}
  		addActionListener(actionListener);
  		setIconName(iconName);
  	}
  	
  	/**
  	 * Creates a new square button.
  	 * 
  	 * @param iconName The name of the icon button.
  	 * @param actionListener The action listener.
  	 */
  	public SquareButton(String iconName, ActionListener actionListener) {
  		this(iconName, null, actionListener);
  	}
  	
  	/**
  	 * Changes the icon name.
  	 * 
  	 * @param iconName The new icon name.
  	 */
  	public void setIconName(String iconName) {
  		setIcon(Style.getImage(imgpath + iconName + ".png"));
  	}
  
  }
  