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    1   /*
    2    * Copyright (c) 1995, 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.peer;
   26   
   27   import java.awt;
   28   
   29   /**
   30    * The peer interface for {@link Container}. This is the parent interface
   31    * for all container like widgets.
   32    *
   33    * The peer interfaces are intended only for use in porting
   34    * the AWT. They are not intended for use by application
   35    * developers, and developers should not implement peers
   36    * nor invoke any of the peer methods directly on the peer
   37    * instances.
   38    */
   39   public interface ContainerPeer extends ComponentPeer {
   40   
   41       /**
   42        * Returns the insets of this container. Insets usually is the space that
   43        * is occupied by things like borders.
   44        *
   45        * @return the insets of this container
   46        */
   47       Insets getInsets();
   48   
   49       /**
   50        * Notifies the peer that validation of the component tree is about to
   51        * begin.
   52        *
   53        * @see Container#validate()
   54        */
   55       void beginValidate();
   56   
   57       /**
   58        * Notifies the peer that validation of the component tree is finished.
   59        *
   60        * @see Container#validate()
   61        */
   62       void endValidate();
   63   
   64       /**
   65        * Notifies the peer that layout is about to begin. This is called
   66        * before the container itself and its children are laid out.
   67        *
   68        * @see Container#validateTree()
   69        */
   70       void beginLayout();
   71   
   72       /**
   73        * Notifies the peer that layout is finished. This is called after the
   74        * container and its children have been laid out.
   75        *
   76        * @see Container#validateTree()
   77        */
   78       void endLayout();
   79   }

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