Showing the changes to java/pkg/sun/awt/VariableGridLayout.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,231 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (c) 1995, 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 sun.awt; | ||
| 27 | |||
| 28 | import java.awt.*; | ||
| 29 | import java.util.BitSet; | ||
| 30 | |||
| 31 | |||
| 32 | /** | ||
| 33 | * A layout manager for a container that lays out grids. Allows setting | ||
| 34 | * the relative sizes of rows and columns. | ||
| 35 | * | ||
| 36 | * @author Herb Jellinek | ||
| 37 | */ | ||
| 38 | |||
| 39 | |||
| 40 | public class VariableGridLayout extends GridLayout { | ||
| 41 | |||
| 42 | BitSet rowsSet = new BitSet(); | ||
| 43 | double rowFractions[] = null; | ||
| 44 | |||
| 45 | BitSet colsSet = new BitSet(); | ||
| 46 | double colFractions[] = null; | ||
| 47 | |||
| 48 | int rows; | ||
| 49 | int cols; | ||
| 50 | int hgap; | ||
| 51 | int vgap; | ||
| 52 | |||
| 53 | /** | ||
| 54 | * Creates a grid layout with the specified rows and specified columns. | ||
| 55 | * @param rows the rows | ||
| 56 | * @param cols the columns | ||
| 57 | */ | ||
| 58 | public VariableGridLayout(int rows, int cols) { | ||
| 59 | this(rows, cols, 0, 0); | ||
| 60 | |||
| 61 | if (rows != 0) { | ||
| 62 | rowsSet = new BitSet(rows); | ||
| 63 | stdRowFractions(rows); | ||
| 64 | } | ||
| 65 | |||
| 66 | if (cols != 0) { | ||
| 67 | colsSet = new BitSet(cols); | ||
| 68 | stdColFractions(cols); | ||
| 69 | } | ||
| 70 | } | ||
| 71 | |||
| 72 | /** | ||
| 73 | * Creates a grid layout with the specified rows, columns, | ||
| 74 | * horizontal gap, and vertical gap. | ||
| 75 | * @param rows the rows | ||
| 76 | * @param cols the columns | ||
| 77 | * @param hgap the horizontal gap variable | ||
| 78 | * @param vgap the vertical gap variable | ||
| 79 | * @exception IllegalArgumentException If the rows and columns are invalid. | ||
| 80 | */ | ||
| 81 | public VariableGridLayout(int rows, int cols, int hgap, int vgap) { | ||
| 82 | super(rows, cols, hgap, vgap); | ||
| 83 | |||
| 84 | this.rows = rows; | ||
| 85 | this.cols = cols; | ||
| 86 | this.hgap = hgap; | ||
| 87 | this.vgap = vgap; | ||
| 88 | |||
| 89 | if (rows != 0) { | ||
| 90 | rowsSet = new BitSet(rows); | ||
| 91 | stdRowFractions(rows); | ||
| 92 | } | ||
| 93 | |||
| 94 | if (cols != 0) { | ||
| 95 | colsSet = new BitSet(cols); | ||
| 96 | stdColFractions(cols); | ||
| 97 | } | ||
| 98 | } | ||
| 99 | |||
| 100 | void stdRowFractions(int nrows) { | ||
| 101 | rowFractions = new double[nrows]; | ||
| 102 | for (int i = 0; i < nrows; i++) { | ||
| 103 | rowFractions[i] = 1.0 / nrows; | ||
| 104 | } | ||
| 105 | } | ||
| 106 | |||
| 107 | void stdColFractions(int ncols) { | ||
| 108 | colFractions = new double[ncols]; | ||
| 109 | for (int i = 0; i < ncols; i++) { | ||
| 110 | colFractions[i] = 1.0 / ncols; | ||
| 111 | } | ||
| 112 | } | ||
| 113 | |||
| 114 | public void setRowFraction(int rowNum, double fraction) { | ||
| 115 | rowsSet.set(rowNum); | ||
| 116 | rowFractions[rowNum] = fraction; | ||
| 117 | } | ||
| 118 | |||
| 119 | public void setColFraction(int colNum, double fraction) { | ||
| 120 | colsSet.set(colNum); | ||
| 121 | colFractions[colNum] = fraction; | ||
| 122 | } | ||
| 123 | |||
| 124 | public double getRowFraction(int rowNum) { | ||
| 125 | return rowFractions[rowNum]; | ||
| 126 | } | ||
| 127 | |||
| 128 | public double getColFraction(int colNum) { | ||
| 129 | return colFractions[colNum]; | ||
| 130 | } | ||
| 131 | |||
| 132 | void allocateExtraSpace(double vec[], BitSet userSet) { | ||
| 133 | // collect the space that's been explicitly allocated... | ||
| 134 | double total = 0.0; | ||
| 135 | int unallocated = 0; | ||
| 136 | int i; | ||
| 137 | for (i = 0; i < vec.length; i++) { | ||
| 138 | if (userSet.get(i)) { | ||
| 139 | total += vec[i]; | ||
| 140 | } else { | ||
| 141 | unallocated++; | ||
| 142 | } | ||
| 143 | } | ||
| 144 | |||
| 145 | // ... then spread the extra space | ||
| 146 | if (unallocated != 0) { | ||
| 147 | double space = (1.0 - total) / unallocated; | ||
| 148 | for (i = 0; i < vec.length; i++) { | ||
| 149 | if (!userSet.get(i)) { | ||
| 150 | vec[i] = space; | ||
| 151 | userSet.set(i); | ||
| 152 | } | ||
| 153 | } | ||
| 154 | } | ||
| 155 | } | ||
| 156 | |||
| 157 | |||
| 158 | void allocateExtraSpace() { | ||
| 159 | allocateExtraSpace(rowFractions, rowsSet); | ||
| 160 | allocateExtraSpace(colFractions, colsSet); | ||
| 161 | } | ||
| 162 | |||
| 163 | /** | ||
| 164 | * Lays out the container in the specified panel. | ||
| 165 | * @param parent the specified component being laid out | ||
| 166 | * @see Container | ||
| 167 | */ | ||
| 168 | public void layoutContainer(Container parent) { | ||
| 169 | Insets insets = parent.insets(); | ||
| 170 | int ncomponents = parent.countComponents(); | ||
| 171 | int nrows = rows; | ||
| 172 | int ncols = cols; | ||
| 173 | |||
| 174 | if (nrows > 0) { | ||
| 175 | ncols = (ncomponents + nrows - 1) / nrows; | ||
| 176 | } else { | ||
| 177 | nrows = (ncomponents + ncols - 1) / ncols; | ||
| 178 | } | ||
| 179 | |||
| 180 | if (rows == 0) { | ||
| 181 | stdRowFractions(nrows); | ||
| 182 | } | ||
| 183 | if (cols == 0) { | ||
| 184 | stdColFractions(ncols); | ||
| 185 | } | ||
| 186 | |||
| 187 | Dimension size = parent.size(); | ||
| 188 | int w = size.width - (insets.left + insets.right); | ||
| 189 | int h = size.height - (insets.top + insets.bottom); | ||
| 190 | |||
| 191 | w = (w - (ncols - 1) * hgap); | ||
| 192 | h = (h - (nrows - 1) * vgap); | ||
| 193 | |||
| 194 | allocateExtraSpace(); | ||
| 195 | |||
| 196 | for (int c = 0, x = insets.left ; c < ncols ; c++) { | ||
| 197 | int colWidth = (int)(getColFraction(c) * w); | ||
| 198 | for (int r = 0, y = insets.top ; r < nrows ; r++) { | ||
| 199 | int i = r * ncols + c; | ||
| 200 | int rowHeight = (int)(getRowFraction(r) * h); | ||
| 201 | |||
| 202 | if (i < ncomponents) { | ||
| 203 | parent.getComponent(i).reshape(x, y, colWidth, rowHeight); | ||
| 204 | } | ||
| 205 | y += rowHeight + vgap; | ||
| 206 | } | ||
| 207 | x += colWidth + hgap; | ||
| 208 | } | ||
| 209 | } | ||
| 210 | |||
| 211 | static String fracsToString(double array[]) { | ||
| 212 | String result = "["+array.length+"]"; | ||
| 213 | |||
| 214 | for (int i = 0; i < array.length; i++) { | ||
| 215 | result += "<"+array[i]+">"; | ||
| 216 | } | ||
| 217 | return result; | ||
| 218 | } | ||
| 219 | |||
| 220 | /** | ||
| 221 | * Returns the String representation of this VariableGridLayout's values. | ||
| 222 | */ | ||
| 223 | public String toString() { | ||
| 224 | return getClass().getName() + "[hgap=" + hgap + ",vgap=" + vgap + | ||
| 225 | ",rows=" + rows + ",cols=" + cols + | ||
| 226 | ",rowFracs=" + | ||
| 227 | fracsToString(rowFractions) + | ||
| 228 | ",colFracs=" + | ||
| 229 | fracsToString(colFractions) + "]"; | ||
| 230 | } | ||
| 231 | } | ||