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Text File | 1999-05-28 | 1.6 KB | 41 lines | [TEXT/CWIE] |
- // LayoutManager.java
- // By Ned Etcode
- // Copyright 1996, 1997 Netscape Communications Corp. All rights reserved.
-
- package netscape.application;
-
- /** Interface for objects interested in acting as a LayoutManager, an object
- * which determines the size and position of a View's subviews. Views
- * automatically call their LayoutManager's <b>layoutView()</b> method from
- * their <b>didSizeBy()</b> method (in response to a resize), so that the
- * LayoutManager can adjust the View's subviews' sizes and positions. Views
- * also call their LayoutManager's <b>addSubview()</b> and
- * <b>removeSubview()</b> methods as they gain and lose subviews. In
- * response, a LayoutManager can immediately relayout the View's subviews, or
- * do nothing until all modifications have been made to the View. In this
- * case, <b>layoutView()</b> must be called explicitly once the modifications
- * have been completed.
- * @see View#setLayoutManager
- */
-
- public interface LayoutManager {
- /** Notifies the LayoutManager that <b>aView</b> has been added to the
- * View hierarchy.
- */
- public void addSubview(View aView);
-
- /** Notifies the LayoutManager that <b>aView</b> has been removed from the
- * View hierarchy.
- */
- public void removeSubview(View aView);
-
- /** Requests that the LayoutManager position <b>aView</b>'s subviews.
- * A View calls <b>layoutView()</b> from its <b>didSizeBy()</b> method.
- * <b>deltaWidth</b> and <b>deltaHeight</b> represent the delta between
- * <b>aView</b>'s old size and its current size.
- * @see View#didSizeBy
- */
- public void layoutView(View aView, int deltaWidth, int deltaHeight);
- }
-
-