/*******************************************************************************
 * Copyright (c) 2003, 2017 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.swt.browser;

import java.util.*;
import java.util.function.*;

/**
 * This listener interface may be implemented in order to receive
 * a {@link WindowEvent} notification when a window hosting a
 * {@link Browser} needs to be displayed or hidden.
 *
 * @see Browser#addVisibilityWindowListener(VisibilityWindowListener)
 * @see Browser#removeVisibilityWindowListener(VisibilityWindowListener)
 * @see OpenWindowListener
 * @see CloseWindowListener
 *
 * @since 3.0
 */
public interface VisibilityWindowListener extends EventListener {

/**
 * This method is called when the window hosting a <code>Browser</code>
 * is requested to be hidden. Application would typically hide the
 * {@link org.eclipse.swt.widgets.Shell} that hosts the <code>Browser</code>.
 *
 * <p>The following fields in the <code>WindowEvent</code> apply:</p>
 * <ul>
 * <li>(in) widget the <code>Browser</code> that needs to be hidden
 * </ul>
 *
 * @param event the <code>WindowEvent</code> that specifies the
 * <code>Browser</code> that needs to be hidden
 *
 * @see org.eclipse.swt.widgets.Shell#setVisible(boolean)
 *
 * @since 3.0
 */
public void hide(WindowEvent event);

/**
 * This method is called when the window hosting a <code>Browser</code>
 * is requested to be displayed. Application would typically set the
 * location and the size of the {@link org.eclipse.swt.widgets.Shell}
 * that hosts the <code>Browser</code>, if a particular location and size
 * are specified. The application would then open that <code>Shell</code>.
 *
 * <p>The following fields in the <code>WindowEvent</code> apply:</p>
 * <ul>
 * <li>(in) widget the <code>Browser</code> to display
 * <li>(in) location the requested location for the <code>Shell</code>
 * hosting the browser. It is <code>null</code> if no location is set.
 * <li>(in) size the requested size for the <code>Browser</code>.
 * The client area of the <code>Shell</code> hosting the
 * <code>Browser</code> should be large enough to accommodate that size.
 * It is <code>null</code> if no size is set.
 * <li>(in) addressBar <code>true</code> if the <code>Shell</code>
 * hosting the <code>Browser</code> should display an address bar or
 * <code>false</code> otherwise
 * <li>(in) menuBar <code>true</code> if the <code>Shell</code>
 * hosting the <code>Browser</code> should display a menu bar or
 * <code>false</code> otherwise
 * <li>(in) statusBar <code>true</code> if the <code>Shell</code>
 * hosting the <code>Browser</code> should display a status bar or
 * <code>false</code> otherwise
 * <li>(in) toolBar <code>true</code> if the <code>Shell</code>
 * hosting the <code>Browser</code> should display a tool bar or
 * <code>false</code> otherwise
 * </ul>
 *
 * @param event the <code>WindowEvent</code> that specifies the
 * <code>Browser</code> that needs to be displayed
 *
 * @see org.eclipse.swt.widgets.Control#setLocation(org.eclipse.swt.graphics.Point)
 * @see org.eclipse.swt.widgets.Control#setSize(org.eclipse.swt.graphics.Point)
 * @see org.eclipse.swt.widgets.Shell#open()
 *
 * @since 3.0
 */
public void show(WindowEvent event);

/**
 * Static helper method to create a <code>VisibilityWindowListener</code> for thehide
 * {@link #hide(WindowEvent e)}) method, given a lambda expression or a method reference.
 *
 * @param c the consumer of the event
 * @return LocationListener
 * @since 3.107
 */
public static VisibilityWindowListener hideAdapter(Consumer<WindowEvent> c) {
	return new VisibilityWindowAdapter() {
		@Override
		public void hide(WindowEvent e) {
			c.accept(e);
		}
	};
}

/**
 * Static helper method to create a <code>VisibilityWindowListener</code> for the
 * {@link #show(WindowEvent e)}) method, given a lambda expression or a method reference.
 *
 * @param c the consumer of the event
 * @return LocationListener
 * @since 3.107
 */
public static VisibilityWindowListener showAdapter(Consumer<WindowEvent> c) {
	return new VisibilityWindowAdapter() {
		@Override
		public void show(WindowEvent e) {
			c.accept(e);
		}
	};
}

}
