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The source code// $Id: ProportionalLayout.java,v 1.8 2004/08/20 15:59:58 mvw Exp $ // Copyright (c) 2003 The Regents of the University of California. All // Rights Reserved. Permission to use, copy, modify, and distribute this // software and its documentation without fee, and without a written // agreement is hereby granted, provided that the above copyright notice // and this paragraph appear in all copies. This software program and // documentation are copyrighted by The Regents of the University of // California. The software program and documentation are supplied "AS // IS", without any accompanying services from The Regents. The Regents // does not warrant that the operation of the program will be // uninterrupted or error-free. The end-user understands that the program // was developed for research purposes and is advised not to rely // exclusively on the program for any reason. IN NO EVENT SHALL THE // UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, // SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, // ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF // THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF // SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE // PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF // CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, // UPDATES, ENHANCEMENTS, OR MODIFICATIONS. /* * ProportionalLayout.java */ package org.argouml.swingext; import java.awt.*; import java.util.*; /** * Allows components to be a set as a proportion to their container or * left as fixed size. Components are resized accordingly when the * parent is resized. * * @author Bob Tarling */ public class ProportionalLayout extends LineLayout { private Hashtable componentTable; /** * The constructor. */ public ProportionalLayout() { this(HORIZONTAL); } /** * The constructor. * * @param orientation the orientation */ public ProportionalLayout(Orientation orientation) { super(orientation); componentTable = new Hashtable(); } /** * @see java.awt.LayoutManager2#addLayoutComponent(java.awt.Component, * java.lang.Object) */ public final void addLayoutComponent(Component comp, Object constraints) { if (constraints == null) constraints = ""; addLayoutComponent((String) constraints, comp); } /** * @see java.awt.LayoutManager#addLayoutComponent(java.lang.String, * java.awt.Component) */ public void addLayoutComponent(String name, Component comp) { try { componentTable.put(comp, name.toString()); } catch (Exception e) { componentTable.put(comp, ""); } } /** * @see java.awt.LayoutManager#removeLayoutComponent(java.awt.Component) */ public void removeLayoutComponent(Component comp) { componentTable.remove(comp); } /** * @see java.awt.LayoutManager#layoutContainer(java.awt.Container) */ public void layoutContainer(Container parent) { // Find the total proportional size of all visible components double totalProportionalLength = 0; int totalLength; totalLength = getMyOrientation().getLengthMinusInsets(parent); Enumeration enumKeys = componentTable.keys(); while (enumKeys.hasMoreElements()) { Component comp = (Component) enumKeys.nextElement(); if (comp.isVisible()) { String size = (String) (componentTable.get(comp)); if (size.length() != 0) { totalProportionalLength += Double.parseDouble(size); } else { totalLength -= getMyOrientation().getLength(comp); } } } Insets insets = parent.getInsets(); Point loc = new Point(insets.top, insets.left); int length = 0; int nComps = parent.getComponentCount(); for (int i = 0; i < nComps; i++) { Component comp = parent.getComponent(i); if (comp.isVisible()) { String proportionalLength = (String) (componentTable.get(comp)); if (proportionalLength.length() != 0) { length = (int) ((totalLength * Double.parseDouble(proportionalLength)) / totalProportionalLength); if (length < 0) length = 0; } else { length = getMyOrientation().getLength(comp); } comp.setSize(getMyOrientation().setLength(parent.getSize(), length)); comp.setLocation(loc); loc = getMyOrientation().addToPosition(loc, length); } } } /** * @return Returns the componentTable. */ protected Hashtable getComponentTable() { return componentTable; } } |
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