/*******************************************************************************
* Copyright (c) 2012-2017 Codenvy, S.A.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Codenvy, S.A. - initial API and implementation
*******************************************************************************/
package org.eclipse.che.ide.util;
import com.google.gwt.user.client.ui.FocusWidget;
import com.google.gwt.user.client.ui.HasWidgets;
import com.google.gwt.user.client.ui.Widget;
import java.util.ArrayList;
import java.util.List;
/**
* Utility methods for GWT Elements.
*
* @author Evgen Vidolob
* @author Vlad Zhukovskyi
*/
public class UIUtil {
public static final char MNEMONIC = 0x1B;
/**
* Lookup all nested children in widget and tries to search children which implement Focusable interface.
*
* @param widget
* widget to lookup
* @return list of {@link com.google.gwt.user.client.ui.Focusable} widgets or empty list if none was found
* @see com.google.gwt.user.client.ui.Focusable
*/
public static List<FocusWidget> getFocusableChildren(Widget widget) {
List<FocusWidget> focusable = new ArrayList<>();
if (widget instanceof FocusWidget) {
focusable.add((FocusWidget)widget);
}
if (widget instanceof HasWidgets) {
for (Widget w : ((HasWidgets)widget)) {
focusable.addAll(getFocusableChildren(w));
}
}
return focusable;
}
}