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| 1 | +/* | |
| 2 | + * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | +package java.awt; | |
| 26 | + | |
| 27 | +interface EventFilter { | |
| 28 | + | |
| 29 | + /** | |
| 30 | + * Enumeration for possible values for <code>acceptEvent(AWTEvent ev)</code> method. | |
| 31 | + * @see EventDispatchThread#pumpEventsForFilters(EventFilter) | |
| 32 | + */ | |
| 33 | + static enum FilterAction { | |
| 34 | + /** | |
| 35 | + * ACCEPT means that this filter do not filter the event and allowes other | |
| 36 | + * active filters to proceed it. If all the active filters accept the event, it | |
| 37 | + * is dispatched by the <code>EventDispatchThread</code> | |
| 38 | + * @see EventDispatchThread#pumpEventsForFilters(EventFilter) | |
| 39 | + */ | |
| 40 | + ACCEPT, | |
| 41 | + /** | |
| 42 | + * REJECT means that this filter filter the event. No other filters are queried, | |
| 43 | + * and the event is not dispatched by the <code>EventDispatchedThread</code> | |
| 44 | + * @see EventDispatchThread#pumpEventsForFilters(EventFilter) | |
| 45 | + */ | |
| 46 | + REJECT, | |
| 47 | + /** | |
| 48 | + * ACCEPT_IMMEDIATELY means that this filter do not filter the event, no other | |
| 49 | + * filters are queried and to proceed it, and it is dispatched by the | |
| 50 | + * <code>EventDispatchThread</code> | |
| 51 | + * It is not recommended to use ACCEPT_IMMEDIATELY as there may be some active | |
| 52 | + * filters not queried yet that do not accept this event. It is primarily used | |
| 53 | + * by modal filters. | |
| 54 | + * @see EventDispatchThread#pumpEventsForFilters(EventFilter) | |
| 55 | + * @see ModalEventFilter | |
| 56 | + */ | |
| 57 | + ACCEPT_IMMEDIATELY | |
| 58 | + }; | |
| 59 | + | |
| 60 | + FilterAction acceptEvent(AWTEvent ev); | |
| 61 | +} | |