HasOrientation.java

package com.sksamuel.jqm4gwt;

/**
 * @author Stephen K Samuel samspade79@gmail.com 11 Jul 2011 22:07:28
 *
 *         Interface for elements that are able to be rendered either
 *         horizontally or vertically.
 *
 */
public interface HasOrientation<T> {

	/**
	 * Returns true if this widget is currently set to be rendered in
	 * horizontal mode
	 */
	boolean isHorizontal();

	/**
	 * Returns true if this widget is currently set to be rendered in vertical
	 * mode
	 */
	boolean isVertical();

    /**
   	 * Set this widget to be rendered horizontally. If already set to
   	 * horizontal then this has no effect.
   	 */
   	void setHorizontal();

   	/**
   	 * Set this widget to be rendered vertically. If already set to vertical
   	 * then this has no effect.
   	 */
   	void setVertical();

	/**
	 * Set this widget to be rendered horizontally. If already set to
	 * horizontal then this has no effect.
	 */
	T withHorizontal();

	/**
	 * Set this widget to be rendered vertically. If already set to vertical
	 * then this has no effect.
	 */
	T withVertical();

	class Support {
	    private Support() {} // static class, not supposed to be instantiated

	    public static void setOrientation(HasOrientation<?> hasOrientation, Orientation value) {
	        switch (value) {
	            case HORIZONTAL:
	                hasOrientation.setHorizontal();
	                break;

	            case VERTICAL:
	                hasOrientation.setVertical();
	                break;
	        }
	    }

	    public static Orientation getOrientation(HasOrientation<?> hasOrientation) {
	        if (hasOrientation.isHorizontal()) return Orientation.HORIZONTAL;
	        else if (hasOrientation.isVertical()) return Orientation.VERTICAL;
	        else return null;
	    }
	}
}