package com.jotuntech.sketcher.client;

import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;

/**
 * An collection of built-in Swing look and feels. This saves clients the
 * trouble of manually setting the look and feel.
 *
 * @author Aaron Faanes
 *
 * @see javax.swing.LookAndFeel
 */
public enum LookAndFeel {

	/**
	 * Represents the Nimbus look-and-feel that was added in Java 6 Update
	 * 10.
	 */
	NIMBUS() {

		private volatile String name;

		@Override
		public String getName() {
			if (this.name == null) {
				for (final LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
					if (info.getClassName().contains("nimbus")) {
						this.name = info.getClassName();
					}
				}
			}
			return this.name;
		}

	},

	/**
	 * Represents the look-and-feel that emulates the system
	 *
	 * @see UIManager#getSystemLookAndFeelClassName()
	 */
	SYSTEM() {

		@Override
		public String getName() {
			return UIManager.getSystemLookAndFeelClassName();
		}
	};

	/**
	 * Returns the name of the class that implements this look-and-feel. The
	 * returned name, if non-null, can be directly used in a
	 * {@link UIManager#setLookAndFeel(String)} invocation. If the returned
	 * value is null, then no class name could be found.
	 *
	 *
	 * @return the name of the class that implements this look-and-feel, or
	 *         {@code null} if no class name could be found
	 */
	public abstract String getName();

	/**
	 * Sets the global look and feel to this look and feel.
	 *
	 * @return {@code true} if setting the look-and-feel was successful,
	 *         otherwise {@code false}
	 */
	public boolean activate() {
		final String name = this.getName();
		if (name == null) {
			return false;
		}
		try {
			UIManager.setLookAndFeel(name);
			return true;
		} catch (final Exception e) {
			return false;
		}
	}
}