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- /*
- * Copyright 2000-2014 Vaadin Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
- package com.vaadin.client.ui;
-
- import com.google.gwt.user.client.ui.Focusable;
- import com.google.gwt.user.client.ui.Widget;
-
- /**
- * A helper class used to make it easier for {@link Widget}s to implement
- * {@link Focusable}.
- *
- * @author Vaadin Ltd
- * @version @VERSION@
- * @since 7.0.3
- *
- */
- public class FocusUtil {
-
- /**
- * Sets the access key property
- *
- * @param focusable
- * The widget for which we want to set the access key.
- * @param key
- * The access key to set
- */
- public static void setAccessKey(Widget focusable, char key) {
- assert (focusable != null && focusable.getElement() != null) : "Can't setAccessKey for a widget without an element";
- focusable.getElement().setPropertyString("accessKey", "" + key);
- }
-
- /**
- * Explicitly focus/unfocus the given widget. Only one widget can have focus
- * at a time, and the widget that does will receive all keyboard events.
- *
- * @param focusable
- * the widget to focus/unfocus
- * @param focused
- * whether this widget should take focus or release it
- */
- public static void setFocus(Widget focusable, boolean focus) {
- assert (focusable != null && focusable.getElement() != null) : "Can't setFocus for a widget without an element";
-
- if (focus) {
- focusable.getElement().focus();
- } else {
- focusable.getElement().blur();
- }
- }
-
- /**
- * Sets the widget's position in the tab index. If more than one widget has
- * the same tab index, each such widget will receive focus in an arbitrary
- * order. Setting the tab index to <code>-1</code> will cause the widget to
- * be removed from the tab order.
- *
- * @param focusable
- * The widget
- * @param tabIndex
- * the widget's tab index
- */
- public static void setTabIndex(Widget focusable, int tabIndex) {
- assert (focusable != null && focusable.getElement() != null) : "Can't setTabIndex for a widget without an element";
-
- focusable.getElement().setTabIndex(tabIndex);
- }
-
- /**
- * Gets the widget's position in the tab index.
- *
- * @param focusable
- * The widget
- *
- * @return the widget's tab index
- */
- public static int getTabIndex(Widget focusable) {
- assert (focusable != null && focusable.getElement() != null) : "Can't getTabIndex for a widget without an element";
-
- return focusable.getElement().getTabIndex();
- }
- }
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