/*
 * Copyright (c) 1996, 2001, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package java.awt;

/**
 * Defines an interface for classes that know how to layout Containers
 * based on a layout constraints object.
 *
 * This interface extends the LayoutManager interface to deal with layouts
 * explicitly in terms of constraint objects that specify how and where
 * components should be added to the layout.
 * <p>
 * This minimal extension to LayoutManager is intended for tool
 * providers who wish to the creation of constraint-based layouts.
 * It does not yet provide full, general support for custom
 * constraint-based layout managers.
 *
 * @see LayoutManager
 * @see Container
 *
 * @author Jonni Kanerva
 */
public interface LayoutManager2 extends LayoutManager {

 /**
 * Adds the specified component to the layout, using the specified
 * constraint object.
 * @param comp the component to be added
 * @param constraints where/how the component is added to the layout.
 */
 void addLayoutComponent(Component comp, Object constraints);

 /**
 * Calculates the maximum size dimensions for the specified container,
 * given the components it contains.
 * @see java.awt.Component#getMaximumSize
 * @see LayoutManager
 */
 public Dimension maximumLayoutSize(Container target);

 /**
 * Returns the alignment along the x axis. This specifies how
 * the component would like to be aligned relative to other
 * components. The value should be a number between 0 and 1
 * where 0 represents alignment along the origin, 1 is aligned
 * the furthest away from the origin, 0.5 is centered, etc.
 */
 public float getLayoutAlignmentX(Container target);

 /**
 * Returns the alignment along the y axis. This specifies how
 * the component would like to be aligned relative to other
 * components. The value should be a number between 0 and 1
 * where 0 represents alignment along the origin, 1 is aligned
 * the furthest away from the origin, 0.5 is centered, etc.
 */
 public float getLayoutAlignmentY(Container target);

 /**
 * Invalidates the layout, indicating that if the layout manager
 * has cached information it should be discarded.
 */
 public void invalidateLayout(Container target);

}