| /* |
| * Copyright (c) 1995, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.awt; |
| |
| import java.awt.*; |
| |
| |
| /** |
| * A vertical 'bag' of Components. Allocates space for each Component from |
| * top to bottom. |
| * |
| * @author Herb Jellinek |
| */ |
| public class VerticalBagLayout implements LayoutManager { |
| |
| int vgap; |
| |
| /** |
| * Constructs a new VerticalBagLayout. |
| */ |
| public VerticalBagLayout() { |
| this(0); |
| } |
| |
| /** |
| * Constructs a VerticalBagLayout with the specified gaps. |
| * @param vgap the vertical gap |
| */ |
| public VerticalBagLayout(int vgap) { |
| this.vgap = vgap; |
| } |
| |
| /** |
| * Adds the specified named component to the layout. |
| * @param name the String name |
| * @param comp the component to be added |
| */ |
| public void addLayoutComponent(String name, Component comp) { |
| } |
| |
| /** |
| * Removes the specified component from the layout. |
| * @param comp the component to be removed |
| */ |
| public void removeLayoutComponent(Component comp) { |
| } |
| |
| /** |
| * Returns the minimum dimensions needed to lay out the components |
| * contained in the specified target container. |
| * @param target the Container on which to do the layout |
| * @see Container |
| * @see #preferredLayoutSize |
| */ |
| public Dimension minimumLayoutSize(Container target) { |
| Dimension dim = new Dimension(); |
| int nmembers = target.countComponents(); |
| |
| for (int i = 0; i < nmembers; i++) { |
| Component comp = target.getComponent(i); |
| if (comp.isVisible()) { |
| Dimension d = comp.minimumSize(); |
| dim.width = Math.max(d.width, dim.width); |
| dim.height += d.height + vgap; |
| } |
| } |
| |
| Insets insets = target.insets(); |
| dim.width += insets.left + insets.right; |
| dim.height += insets.top + insets.bottom; |
| |
| return dim; |
| } |
| |
| /** |
| * Returns the preferred dimensions for this layout given the components |
| * in the specified target container. |
| * @param target the component which needs to be laid out |
| * @see Container |
| * @see #minimumLayoutSize |
| */ |
| public Dimension preferredLayoutSize(Container target) { |
| Dimension dim = new Dimension(); |
| int nmembers = target.countComponents(); |
| |
| for (int i = 0; i < nmembers; i++) { |
| Component comp = target.getComponent(i); |
| if (true || comp.isVisible()) { |
| Dimension d = comp.preferredSize(); |
| dim.width = Math.max(d.width, dim.width); |
| dim.height += d.height + vgap; |
| } |
| } |
| |
| Insets insets = target.insets(); |
| dim.width += insets.left + insets.right; |
| dim.height += insets.top + insets.bottom; |
| |
| return dim; |
| } |
| |
| /** |
| * Lays out the specified container. This method will actually reshape the |
| * components in the specified target container in order to satisfy the |
| * constraints of the VerticalBagLayout object. |
| * @param target the component being laid out |
| * @see Container |
| */ |
| public void layoutContainer(Container target) { |
| Insets insets = target.insets(); |
| int top = insets.top; |
| int bottom = target.size().height - insets.bottom; |
| int left = insets.left; |
| int right = target.size().width - insets.right; |
| int nmembers = target.countComponents(); |
| |
| for (int i = 0; i < nmembers; i++) { |
| Component comp = target.getComponent(i); |
| if (comp.isVisible()) { |
| int compHeight = comp.size().height; |
| comp.resize(right - left, compHeight); |
| Dimension d = comp.preferredSize(); |
| comp.reshape(left, top, right - left, d.height); |
| top += d.height + vgap; |
| } |
| } |
| } |
| |
| /** |
| * Returns the String representation of this VerticalBagLayout's values. |
| */ |
| public String toString() { |
| return getClass().getName() + "[vgap=" + vgap + "]"; |
| } |
| } |