gvsig-raster / org.gvsig.raster / trunk / org.gvsig.raster / org.gvsig.raster.swing / org.gvsig.raster.swing.impl / src / main / java / org / gvsig / raster / swing / impl / pagedtable / Pager.java @ 1506
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1 | 1497 | nbrodin | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2013 gvSIG Association.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 2
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | */
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24 | package org.gvsig.raster.swing.impl.pagedtable; |
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25 | |||
26 | import java.util.ArrayList; |
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27 | import java.util.List; |
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28 | 1503 | nbrodin | import java.util.Observable; |
29 | 1497 | nbrodin | |
30 | 1503 | nbrodin | |
31 | 1497 | nbrodin | /**
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32 | * @author Nacho Brodin (nachobrodin@gmail.com)
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33 | */
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34 | 1503 | nbrodin | public class Pager extends Observable { |
35 | 1497 | nbrodin | private List<Object> entries = null; |
36 | private int entriesPerPage = 0; |
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37 | private int selectedPage = 0; |
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38 | private int[] selectedRows = null; |
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39 | 1504 | nbrodin | |
40 | public static int CHANGE_SELECTED_ROWS = 0; |
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41 | public static int CHANGE_ADD_ENTRY = 1; |
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42 | public static int CHANGE_REMOVE_ENTRY = 2; |
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43 | public static int CHANGE_REMOVE_ALL = 3; |
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44 | public static int CHANGE_SELECTED_PAGE = 4; |
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45 | //public static int CHANGE_SWAP_ROWS = 5;
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46 | 1497 | nbrodin | |
47 | public Pager(int entriesPerPage) { |
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48 | this.entriesPerPage = entriesPerPage;
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49 | entries = new ArrayList<Object>(); |
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50 | } |
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51 | |||
52 | public void setEntriesPerPage(int n) { |
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53 | this.entriesPerPage = n;
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54 | } |
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55 | |||
56 | public void increaseSelectedPage() { |
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57 | 1504 | nbrodin | if(selectedPage < getPageCount() - 1) { |
58 | 1497 | nbrodin | selectedPage ++; |
59 | 1504 | nbrodin | setChanged(); |
60 | notifyObservers(CHANGE_SELECTED_PAGE); |
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61 | } |
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62 | 1497 | nbrodin | } |
63 | |||
64 | public void decreaseSelectedPage() { |
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65 | if (selectedPage > 0) { |
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66 | selectedPage --; |
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67 | 1504 | nbrodin | setChanged(); |
68 | notifyObservers(CHANGE_SELECTED_PAGE); |
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69 | 1497 | nbrodin | } |
70 | } |
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71 | |||
72 | public void setSelectedRows(int[] rows) { |
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73 | selectedRows = rows; |
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74 | 1503 | nbrodin | setChanged(); |
75 | 1504 | nbrodin | notifyObservers(CHANGE_SELECTED_ROWS); |
76 | 1497 | nbrodin | } |
77 | |||
78 | 1504 | nbrodin | public void increaseSelectedRows() { |
79 | 1506 | nbrodin | boolean change = false; |
80 | 1504 | nbrodin | for (int i = 0; i < selectedRows.length; i++) { |
81 | 1506 | nbrodin | if(selectedRows[i] < getEntriesCount()) {
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82 | 1504 | nbrodin | selectedRows[i] ++; |
83 | 1506 | nbrodin | change = true;
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84 | } |
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85 | 1504 | nbrodin | } |
86 | 1506 | nbrodin | if(change) {
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87 | setChanged(); |
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88 | notifyObservers(CHANGE_SELECTED_ROWS); |
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89 | } |
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90 | 1504 | nbrodin | } |
91 | |||
92 | public void decreaseSelectedRows() { |
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93 | 1506 | nbrodin | boolean change = false; |
94 | 1504 | nbrodin | for (int i = 0; i < selectedRows.length; i++) { |
95 | 1506 | nbrodin | if(selectedRows[i] > 0) { |
96 | 1504 | nbrodin | selectedRows[i] --; |
97 | 1506 | nbrodin | change = true;
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98 | } |
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99 | 1504 | nbrodin | } |
100 | 1506 | nbrodin | if(change) {
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101 | setChanged(); |
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102 | notifyObservers(CHANGE_SELECTED_ROWS); |
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103 | } |
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104 | 1504 | nbrodin | } |
105 | |||
106 | public void addSelectedRow(int row) { |
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107 | int[] newSelected = new int[selectedRows.length + 1]; |
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108 | for (int i = 0; i < selectedRows.length; i++) { |
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109 | newSelected[i] = selectedRows[i]; |
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110 | } |
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111 | newSelected[newSelected.length - 1] = row;
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112 | selectedRows = newSelected; |
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113 | setChanged(); |
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114 | notifyObservers(CHANGE_SELECTED_ROWS); |
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115 | } |
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116 | |||
117 | 1497 | nbrodin | public int[] getSelectedRows() { |
118 | return selectedRows;
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119 | } |
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120 | |||
121 | public void setSelectedPage(int page) { |
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122 | if(page >= 0 && page < getPageCount()) { |
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123 | selectedPage = page; |
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124 | 1503 | nbrodin | setChanged(); |
125 | 1504 | nbrodin | notifyObservers(CHANGE_SELECTED_PAGE); |
126 | 1497 | nbrodin | } |
127 | } |
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128 | |||
129 | 1504 | nbrodin | public int getPageFromRow(int row) { |
130 | return (int)(row / getEntriesPerPage()); |
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131 | } |
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132 | |||
133 | 1497 | nbrodin | public List<Object> getSelectedPage() { |
134 | 1501 | nbrodin | return getPage(getSelectedPageNumber());
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135 | 1497 | nbrodin | } |
136 | |||
137 | public void addEntry(Object entry) { |
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138 | entries.add(entry); |
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139 | 1504 | nbrodin | setChanged(); |
140 | notifyObservers(CHANGE_ADD_ENTRY); |
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141 | setSelectedRows(new int[]{entries.size() - 1}); |
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142 | 1497 | nbrodin | } |
143 | |||
144 | public void removeEntry(int pos) { |
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145 | 1504 | nbrodin | if(pos >= 0 && pos < entries.size()) { |
146 | 1497 | nbrodin | entries.remove(pos); |
147 | 1504 | nbrodin | setChanged(); |
148 | notifyObservers(CHANGE_REMOVE_ENTRY); |
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149 | } |
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150 | 1497 | nbrodin | } |
151 | |||
152 | public void swapRow(int i, int j) { |
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153 | if(i == j)
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154 | return;
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155 | if(j < i) {
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156 | int aux = i;
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157 | i = j; |
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158 | j = aux; |
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159 | } |
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160 | |||
161 | Object a = entries.get(i);
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162 | Object b = entries.get(j);
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163 | entries.add(i, b); |
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164 | entries.remove(i + 1);
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165 | entries.add(j, a); |
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166 | entries.remove(j + 1);
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167 | 1504 | nbrodin | |
168 | //setChanged();
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169 | //notifyObservers(CHANGE_REMOVE_ALL);
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170 | 1497 | nbrodin | } |
171 | |||
172 | 1504 | nbrodin | public boolean isSelectedRow(int row) { |
173 | for (int i = 0; i < selectedRows.length; i++) { |
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174 | if(selectedRows[i] == row)
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175 | return true; |
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176 | } |
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177 | return false; |
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178 | } |
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179 | |||
180 | 1497 | nbrodin | public void removePage(int page) { |
181 | if(page >= 0 && page < getPageCount()) { |
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182 | int init = entriesPerPage * page;
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183 | int end = init + entriesPerPage;
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184 | for (int i = end - 1; i >= init; i--) { |
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185 | entries.remove(i); |
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186 | } |
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187 | } |
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188 | } |
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189 | |||
190 | public int getPageCount() { |
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191 | return (int)Math.ceil(entries.size() / (double)entriesPerPage); |
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192 | } |
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193 | |||
194 | 1504 | nbrodin | public boolean isInCurrentPage(int row) { |
195 | int init = selectedPage * getEntriesPerPage();
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196 | int end = init + getEntriesPerPage() - 1; |
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197 | if(row >= init && row <= end)
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198 | return true; |
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199 | return false; |
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200 | } |
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201 | |||
202 | 1497 | nbrodin | public List<Object> getPage(int page) { |
203 | if(page >= 0 && page < getPageCount()) { |
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204 | int init = entriesPerPage * page;
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205 | int end = init + entriesPerPage;
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206 | end = end >= entries.size() ? entries.size() : end; |
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207 | return entries.subList(init, end);
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208 | } |
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209 | return null; |
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210 | } |
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211 | |||
212 | public int getEntriesPerPage() { |
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213 | return entriesPerPage;
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214 | } |
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215 | |||
216 | public int getEntriesCount() { |
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217 | return entries.size();
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218 | } |
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219 | |||
220 | 1504 | nbrodin | public Object[] getLastEntry() { |
221 | return (Object[])entries.get(entries.size() - 1); |
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222 | } |
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223 | |||
224 | 1501 | nbrodin | public int getSelectedPageNumber() { |
225 | if(selectedPage >= getPageCount()) {
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226 | selectedPage = getPageCount() - 1;
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227 | if(selectedPage < 0) |
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228 | selectedPage = 0;
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229 | } |
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230 | return selectedPage;
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231 | } |
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232 | |||
233 | 1497 | nbrodin | public void removeAllEntries() { |
234 | entries.clear(); |
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235 | 1504 | nbrodin | setChanged(); |
236 | notifyObservers(CHANGE_REMOVE_ALL); |
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237 | 1497 | nbrodin | } |
238 | } |