J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1995-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt; |
| 27 | |
| 28 | import java.awt.*; |
| 29 | |
| 30 | /** |
| 31 | * A horizontal 'bag' of Components. Allocates space for each Component |
| 32 | * from left to right. |
| 33 | * |
| 34 | * @author Herb Jellinek |
| 35 | */ |
| 36 | public class HorizBagLayout implements LayoutManager { |
| 37 | |
| 38 | int hgap; |
| 39 | |
| 40 | /** |
| 41 | * Constructs a new HorizBagLayout. |
| 42 | */ |
| 43 | public HorizBagLayout() { |
| 44 | this(0); |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Constructs a HorizBagLayout with the specified gaps. |
| 49 | * @param hgap the horizontal gap |
| 50 | */ |
| 51 | public HorizBagLayout(int hgap) { |
| 52 | this.hgap = hgap; |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Adds the specified named component to the layout. |
| 57 | * @param name the String name |
| 58 | * @param comp the component to be added |
| 59 | */ |
| 60 | public void addLayoutComponent(String name, Component comp) { |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Removes the specified component from the layout. |
| 65 | * @param comp the component to be removed |
| 66 | */ |
| 67 | public void removeLayoutComponent(Component comp) { |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Returns the minimum dimensions needed to lay out the components |
| 72 | * contained in the specified target container. |
| 73 | * @param target the Container on which to do the layout |
| 74 | * @see Container |
| 75 | * @see #preferredLayoutSize |
| 76 | */ |
| 77 | public Dimension minimumLayoutSize(Container target) { |
| 78 | Dimension dim = new Dimension(); |
| 79 | |
| 80 | for (int i = 0; i < target.countComponents(); i++) { |
| 81 | Component comp = target.getComponent(i); |
| 82 | if (comp.isVisible()) { |
| 83 | Dimension d = comp.minimumSize(); |
| 84 | dim.width += d.width + hgap; |
| 85 | dim.height = Math.max(d.height, dim.height); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | Insets insets = target.insets(); |
| 90 | dim.width += insets.left + insets.right; |
| 91 | dim.height += insets.top + insets.bottom; |
| 92 | |
| 93 | return dim; |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Returns the preferred dimensions for this layout given the components |
| 98 | * in the specified target container. |
| 99 | * @param target the component which needs to be laid out |
| 100 | * @see Container |
| 101 | * @see #minimumLayoutSize |
| 102 | */ |
| 103 | public Dimension preferredLayoutSize(Container target) { |
| 104 | Dimension dim = new Dimension(); |
| 105 | |
| 106 | for (int i = 0; i < target.countComponents(); i++) { |
| 107 | Component comp = target.getComponent(i); |
| 108 | if (comp.isVisible()) { |
| 109 | Dimension d = comp.preferredSize(); |
| 110 | dim.width += d.width + hgap; |
| 111 | dim.height = Math.max(dim.height, d.height); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | Insets insets = target.insets(); |
| 116 | dim.width += insets.left + insets.right; |
| 117 | dim.height += insets.top + insets.bottom; |
| 118 | |
| 119 | return dim; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Lays out the specified container. This method will actually reshape the |
| 124 | * components in the specified target container in order to satisfy the |
| 125 | * constraints of the HorizBagLayout object. |
| 126 | * @param target the component being laid out |
| 127 | * @see Container |
| 128 | */ |
| 129 | public void layoutContainer(Container target) { |
| 130 | Insets insets = target.insets(); |
| 131 | int top = insets.top; |
| 132 | int bottom = target.size().height - insets.bottom; |
| 133 | int left = insets.left; |
| 134 | int right = target.size().width - insets.right; |
| 135 | |
| 136 | for (int i = 0; i < target.countComponents(); i++) { |
| 137 | Component comp = target.getComponent(i); |
| 138 | if (comp.isVisible()) { |
| 139 | int compWidth = comp.size().width; |
| 140 | comp.resize(compWidth, bottom - top); |
| 141 | Dimension d = comp.preferredSize(); |
| 142 | comp.reshape(left, top, d.width, bottom - top); |
| 143 | left += d.width + hgap; |
| 144 | } |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Returns the String representation of this HorizBagLayout's values. |
| 150 | */ |
| 151 | public String toString() { |
| 152 | return getClass().getName() + "[hgap=" + hgap + "]"; |
| 153 | } |
| 154 | } |