| 1 | /* LayoutManager2.java -- Enhanced layout manager.
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| 2 | Copyright (C) 1999 Free Software Foundation, Inc.
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| 3 |
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| 4 | This file is part of GNU Classpath.
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| 5 |
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| 6 | GNU Classpath is free software; you can redistribute it and/or modify
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| 7 | it under the terms of the GNU General Public License as published by
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| 8 | the Free Software Foundation; either version 2, or (at your option)
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| 9 | any later version.
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| 10 |
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| 11 | GNU Classpath is distributed in the hope that it will be useful, but
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| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU General Public License
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| 17 | along with GNU Classpath; see the file COPYING. If not, write to the
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| 18 | Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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| 19 | 02111-1307 USA.
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| 20 |
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| 21 | Linking this library statically or dynamically with other modules is
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| 22 | making a combined work based on this library. Thus, the terms and
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| 23 | conditions of the GNU General Public License cover the whole
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| 24 | combination.
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| 25 |
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| 26 | As a special exception, the copyright holders of this library give you
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| 27 | permission to link this library with independent modules to produce an
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| 28 | executable, regardless of the license terms of these independent
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| 29 | modules, and to copy and distribute the resulting executable under
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| 30 | terms of your choice, provided that you also meet, for each linked
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| 31 | independent module, the terms and conditions of the license of that
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| 32 | module. An independent module is a module which is not derived from
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| 33 | or based on this library. If you modify this library, you may extend
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| 34 | this exception to your version of the library, but you are not
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| 35 | obligated to do so. If you do not wish to do so, delete this
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| 36 | exception statement from your version. */
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| 37 |
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| 38 |
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| 39 | package java.awt;
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| 40 |
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| 41 | /**
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| 42 | * Layout manager for laying out containers based on contraints.
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| 43 | *
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| 44 | * @author Aaron M. Renn ([email protected])
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| 45 | */
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| 46 | public interface LayoutManager2 extends LayoutManager
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| 47 | {
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| 48 |
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| 49 | /**
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| 50 | * Adds the specified component to the layout, with the specified
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| 51 | * constraint object.
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| 52 | *
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| 53 | * @param component The component to add.
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| 54 | * @param constraint The constraint object.
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| 55 | */
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| 56 | public abstract void
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| 57 | addLayoutComponent(Component component, Object contraint);
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| 58 |
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| 59 | /*************************************************************************/
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| 60 |
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| 61 | /**
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| 62 | * Determines the minimum size of the specified target container.
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| 63 | *
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| 64 | * @param target The target container.
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| 65 | */
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| 66 | public abstract Dimension
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| 67 | maximumLayoutSize(Container target);
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| 68 |
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| 69 | /*************************************************************************/
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| 70 |
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| 71 | /**
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| 72 | * Returns the preferred X axis alignment for the specified target
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| 73 | * container. This value will range from 0 to 1 where 0 is alignment
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| 74 | * closest to the origin, 0.5 is centered, and 1 is aligned furthest
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| 75 | * from the origin.
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| 76 | *
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| 77 | * @param target The target container.
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| 78 | */
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| 79 | public abstract float
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| 80 | getLayoutAlignmentX(Container target);
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| 81 |
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| 82 | /*************************************************************************/
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| 83 |
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| 84 | /**
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| 85 | * Returns the preferred Y axis alignment for the specified target
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| 86 | * container. This value will range from 0 to 1 where 0 is alignment
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| 87 | * closest to the origin, 0.5 is centered, and 1 is aligned furthest
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| 88 | * from the origin.
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| 89 | *
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| 90 | * @param target The target container.
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| 91 | */
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| 92 | public abstract float
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| 93 | getLayoutAlignmentY(Container target);
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| 94 |
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| 95 | /*************************************************************************/
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| 96 |
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| 97 | /**
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| 98 | * Forces the layout manager to purge any cached information about
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| 99 | * the layout of the target container. This will force it to be
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| 100 | * recalculated.
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| 101 | *
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| 102 | * @param target The target container.
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| 103 | */
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| 104 | public abstract void
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| 105 | invalidateLayout(Container target);
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| 106 |
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| 107 | } // interface LayoutManager2
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| 108 |
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