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| 1 | /* | ||
| 2 | * Copyright (c) 1995, 2003, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package java.awt; | ||
| 27 | |||
| 28 | /** | ||
| 29 | * An <code>Insets</code> object is a representation of the borders | ||
| 30 | * of a container. It specifies the space that a container must leave | ||
| 31 | * at each of its edges. The space can be a border, a blank space, or | ||
| 32 | * a title. | ||
| 33 | * | ||
| 34 | * @author Arthur van Hoff | ||
| 35 | * @author Sami Shaio | ||
| 36 | * @see java.awt.LayoutManager | ||
| 37 | * @see java.awt.Container | ||
| 38 | * @since JDK1.0 | ||
| 39 | */ | ||
| 40 | public class Insets implements Cloneable, java.io.Serializable { | ||
| 41 | |||
| 42 | /** | ||
| 43 | * The inset from the top. | ||
| 44 | * This value is added to the Top of the rectangle | ||
| 45 | * to yield a new location for the Top. | ||
| 46 | * | ||
| 47 | * @serial | ||
| 48 | * @see #clone() | ||
| 49 | */ | ||
| 50 | public int top; | ||
| 51 | |||
| 52 | /** | ||
| 53 | * The inset from the left. | ||
| 54 | * This value is added to the Left of the rectangle | ||
| 55 | * to yield a new location for the Left edge. | ||
| 56 | * | ||
| 57 | * @serial | ||
| 58 | * @see #clone() | ||
| 59 | */ | ||
| 60 | public int left; | ||
| 61 | |||
| 62 | /** | ||
| 63 | * The inset from the bottom. | ||
| 64 | * This value is subtracted from the Bottom of the rectangle | ||
| 65 | * to yield a new location for the Bottom. | ||
| 66 | * | ||
| 67 | * @serial | ||
| 68 | * @see #clone() | ||
| 69 | */ | ||
| 70 | public int bottom; | ||
| 71 | |||
| 72 | /** | ||
| 73 | * The inset from the right. | ||
| 74 | * This value is subtracted from the Right of the rectangle | ||
| 75 | * to yield a new location for the Right edge. | ||
| 76 | * | ||
| 77 | * @serial | ||
| 78 | * @see #clone() | ||
| 79 | */ | ||
| 80 | public int right; | ||
| 81 | |||
| 82 | /* | ||
| 83 | * JDK 1.1 serialVersionUID | ||
| 84 | */ | ||
| 85 | private static final long serialVersionUID = -2272572637695466749L; | ||
| 86 | |||
| 87 | static { | ||
| 88 | /* ensure that the necessary native libraries are loaded */ | ||
| 89 | Toolkit.loadLibraries(); | ||
| 90 | if (!GraphicsEnvironment.isHeadless()) { | ||
| 91 | initIDs(); | ||
| 92 | } | ||
| 93 | } | ||
| 94 | |||
| 95 | /** | ||
| 96 | * Creates and initializes a new <code>Insets</code> object with the | ||
| 97 | * specified top, left, bottom, and right insets. | ||
| 98 | * @param top the inset from the top. | ||
| 99 | * @param left the inset from the left. | ||
| 100 | * @param bottom the inset from the bottom. | ||
| 101 | * @param right the inset from the right. | ||
| 102 | */ | ||
| 103 | public Insets(int top, int left, int bottom, int right) { | ||
| 104 | this.top = top; | ||
| 105 | this.left = left; | ||
| 106 | this.bottom = bottom; | ||
| 107 | this.right = right; | ||
| 108 | } | ||
| 109 | |||
| 110 | /** | ||
| 111 | * Set top, left, bottom, and right to the specified values | ||
| 112 | * | ||
| 113 | * @param top the inset from the top. | ||
| 114 | * @param left the inset from the left. | ||
| 115 | * @param bottom the inset from the bottom. | ||
| 116 | * @param right the inset from the right. | ||
| 117 | * @since 1.5 | ||
| 118 | */ | ||
| 119 | public void set(int top, int left, int bottom, int right) { | ||
| 120 | this.top = top; | ||
| 121 | this.left = left; | ||
| 122 | this.bottom = bottom; | ||
| 123 | this.right = right; | ||
| 124 | } | ||
| 125 | |||
| 126 | /** | ||
| 127 | * Checks whether two insets objects are equal. Two instances | ||
| 128 | * of <code>Insets</code> are equal if the four integer values | ||
| 129 | * of the fields <code>top</code>, <code>left</code>, | ||
| 130 | * <code>bottom</code>, and <code>right</code> are all equal. | ||
| 131 | * @return <code>true</code> if the two insets are equal; | ||
| 132 | * otherwise <code>false</code>. | ||
| 133 | * @since JDK1.1 | ||
| 134 | */ | ||
| 135 | public boolean equals(Object obj) { | ||
| 136 | if (obj instanceof Insets) { | ||
| 137 | Insets insets = (Insets)obj; | ||
| 138 | return ((top == insets.top) && (left == insets.left) && | ||
| 139 | (bottom == insets.bottom) && (right == insets.right)); | ||
| 140 | } | ||
| 141 | return false; | ||
| 142 | } | ||
| 143 | |||
| 144 | /** | ||
| 145 | * Returns the hash code for this Insets. | ||
| 146 | * | ||
| 147 | * @return a hash code for this Insets. | ||
| 148 | */ | ||
| 149 | public int hashCode() { | ||
| 150 | int sum1 = left + bottom; | ||
| 151 | int sum2 = right + top; | ||
| 152 | int val1 = sum1 * (sum1 + 1)/2 + left; | ||
| 153 | int val2 = sum2 * (sum2 + 1)/2 + top; | ||
| 154 | int sum3 = val1 + val2; | ||
| 155 | return sum3 * (sum3 + 1)/2 + val2; | ||
| 156 | } | ||
| 157 | |||
| 158 | /** | ||
| 159 | * Returns a string representation of this <code>Insets</code> object. | ||
| 160 | * This method is intended to be used only for debugging purposes, and | ||
| 161 | * the content and format of the returned string may vary between | ||
| 162 | * implementations. The returned string may be empty but may not be | ||
| 163 | * <code>null</code>. | ||
| 164 | * | ||
| 165 | * @return a string representation of this <code>Insets</code> object. | ||
| 166 | */ | ||
| 167 | public String toString() { | ||
| 168 | return getClass().getName() + "[top=" + top + ",left=" + left + ",bottom=" + bottom + ",right=" + right + "]"; | ||
| 169 | } | ||
| 170 | |||
| 171 | /** | ||
| 172 | * Create a copy of this object. | ||
| 173 | * @return a copy of this <code>Insets</code> object. | ||
| 174 | */ | ||
| 175 | public Object clone() { | ||
| 176 | try { | ||
| 177 | return super.clone(); | ||
| 178 | } catch (CloneNotSupportedException e) { | ||
| 179 | // this shouldn't happen, since we are Cloneable | ||
| 180 | throw new InternalError(); | ||
| 181 | } | ||
| 182 | } | ||
| 183 | /** | ||
| 184 | * Initialize JNI field and method IDs | ||
| 185 | */ | ||
| 186 | private static native void initIDs(); | ||
| 187 | |||
| 188 | } | ||