/*******************************************************************************
 * Copyright (c) 2000, 2015 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jface.preference;

/**
 * An interface used by a preference page to talk to
 * its dialog.
 */
public interface IPreferencePageContainer {
	/**
	 * Returns the preference store.
	 *
	 * @return the preference store, or <code>null</code> if none
	 */
	public IPreferenceStore getPreferenceStore();

	/**
	 * Adjusts the enable state of the OK
	 * button to reflect the state of the currently active
	 * page in this container.
	 * <p>
	 * This method is called by the container itself
	 * when its preference page changes and may be called
	 * by the page at other times to force a button state
	 * update.
	 * </p>
	 */
	public void updateButtons();

	/**
	 * Updates the message (or error message) shown in the message line to
	 * reflect the state of the currently active page in this container.
	 * <p>
	 * This method is called by the container itself
	 * when its preference page changes and may be called
	 * by the page at other times to force a message
	 * update.
	 * </p>
	 */
	public void updateMessage();

	/**
	 * Updates the title to reflect the state of the
	 * currently active page in this container.
	 * <p>
	 * This method is called by the container itself
	 * when its page changes and may be called
	 * by the page at other times to force a title
	 * update.
	 * </p>
	 */
	public void updateTitle();
}
