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jeremybenn |
/* LayoutManager2.java -- enhanced layout manager
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Copyright (C) 1999, 2002 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt;
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/**
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* Layout manager for laying out containers based on contraints. The
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* constraints control how the layout will proceed.
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*
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* @author Aaron M. Renn (arenn@urbanophile.com)
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* @see LayoutManager
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* @see Container
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* @since 1.0
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* @status updated to 1.4
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*/
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public interface LayoutManager2 extends LayoutManager
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{
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/**
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* Adds the specified component to the layout, with the specified
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* constraints object.
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*
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* @param component the component to add
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* @param constraints the constraints to satisfy
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*/
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void addLayoutComponent(Component component, Object constraints);
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/**
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* Determines the maximum size of the specified target container.
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*
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* @param target the container to lay out
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* @return the maximum size of the container
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* @see Component#getMaximumSize()
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*/
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Dimension maximumLayoutSize(Container target);
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/**
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* Returns the preferred X axis alignment for the specified target
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* container. This value will range from 0 to 1 where 0 is alignment
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* closest to the origin, 0.5 is centered, and 1 is aligned furthest
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* from the origin.
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*
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* @param target the target container
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* @return the x-axis alignment preference
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*/
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float getLayoutAlignmentX(Container target);
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/**
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* Returns the preferred Y axis alignment for the specified target
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* container. This value will range from 0 to 1 where 0 is alignment
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* closest to the origin, 0.5 is centered, and 1 is aligned furthest
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* from the origin.
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*
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* @param target the target container
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* @return the y-axis alignment preference
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*/
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float getLayoutAlignmentY(Container target);
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/**
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* Forces the layout manager to purge any cached information about the
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* layout of the target container. This will force it to be recalculated.
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*
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* @param target the target container
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*/
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void invalidateLayout(Container target);
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} // interface LayoutManager2
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