gvsig-raster / org.gvsig.raster / tags / 2.0.0 / org.gvsig.raster.swing / org.gvsig.raster.swing.impl / src / main / java / org / gvsig / raster / swing / impl / pagedtable / Pager.java @ 1705
History | View | Annotate | Download (7.65 KB)
| 1 |
/**
|
|---|---|
| 2 |
* gvSIG. Desktop Geographic Information System.
|
| 3 |
*
|
| 4 |
* Copyright (C) 2007-2013 gvSIG Association.
|
| 5 |
*
|
| 6 |
* This program is free software; you can redistribute it and/or
|
| 7 |
* modify it under the terms of the GNU General Public License
|
| 8 |
* as published by the Free Software Foundation; either version 2
|
| 9 |
* of the License, or (at your option) any later version.
|
| 10 |
*
|
| 11 |
* This program is distributed in the hope that it will be useful,
|
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 14 |
* GNU General Public License for more details.
|
| 15 |
*
|
| 16 |
* You should have received a copy of the GNU General Public License
|
| 17 |
* along with this program; if not, write to the Free Software
|
| 18 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
| 19 |
* MA 02110-1301, USA.
|
| 20 |
*
|
| 21 |
* For any additional information, do not hesitate to contact us
|
| 22 |
* at info AT gvsig.com, or visit our website www.gvsig.com.
|
| 23 |
*/
|
| 24 |
package org.gvsig.raster.swing.impl.pagedtable; |
| 25 |
|
| 26 |
import java.util.ArrayList; |
| 27 |
import java.util.List; |
| 28 |
import java.util.Observable; |
| 29 |
|
| 30 |
|
| 31 |
/**
|
| 32 |
* @author Nacho Brodin (nachobrodin@gmail.com)
|
| 33 |
*/
|
| 34 |
public class Pager extends Observable { |
| 35 |
private List<Object> entries = null; |
| 36 |
private int entriesPerPage = 0; |
| 37 |
private int selectedPage = 0; |
| 38 |
private int[] selectedRows = null; |
| 39 |
|
| 40 |
public static int EVENT_SELECTED_ROWS = 0; |
| 41 |
public static int EVENT_ADD_ENTRY = 1; |
| 42 |
public static int EVENT_REMOVE_ENTRY = 2; |
| 43 |
public static int EVENT_REMOVE_ALL = 3; |
| 44 |
public static int EVENT_SELECTED_PAGE = 4; |
| 45 |
|
| 46 |
public Pager(int entriesPerPage) { |
| 47 |
this.entriesPerPage = entriesPerPage;
|
| 48 |
entries = new ArrayList<Object>(); |
| 49 |
} |
| 50 |
|
| 51 |
//*************ROWS**********************
|
| 52 |
|
| 53 |
public void setSelectedRows(int[] rows) { |
| 54 |
selectedRows = rows; |
| 55 |
setChanged(); |
| 56 |
notifyObservers(EVENT_SELECTED_ROWS); |
| 57 |
} |
| 58 |
|
| 59 |
public void increaseSelectedRows() { |
| 60 |
boolean change = false; |
| 61 |
for (int i = 0; i < selectedRows.length; i++) { |
| 62 |
if(selectedRows[i] < getEntriesCount()) {
|
| 63 |
selectedRows[i] ++; |
| 64 |
change = true;
|
| 65 |
} |
| 66 |
} |
| 67 |
if(change) {
|
| 68 |
setChanged(); |
| 69 |
notifyObservers(EVENT_SELECTED_ROWS); |
| 70 |
} |
| 71 |
} |
| 72 |
|
| 73 |
public void decreaseSelectedRows() { |
| 74 |
boolean change = false; |
| 75 |
for (int i = 0; i < selectedRows.length; i++) { |
| 76 |
if(selectedRows[i] > 0) { |
| 77 |
selectedRows[i] --; |
| 78 |
change = true;
|
| 79 |
} |
| 80 |
} |
| 81 |
if(change) {
|
| 82 |
setChanged(); |
| 83 |
notifyObservers(EVENT_SELECTED_ROWS); |
| 84 |
} |
| 85 |
} |
| 86 |
|
| 87 |
public void addSelectedRow(int row) { |
| 88 |
int[] newSelected = new int[selectedRows.length + 1]; |
| 89 |
for (int i = 0; i < selectedRows.length; i++) { |
| 90 |
newSelected[i] = selectedRows[i]; |
| 91 |
} |
| 92 |
newSelected[newSelected.length - 1] = row;
|
| 93 |
selectedRows = newSelected; |
| 94 |
setChanged(); |
| 95 |
notifyObservers(EVENT_SELECTED_ROWS); |
| 96 |
} |
| 97 |
|
| 98 |
public int[] getSelectedRows() { |
| 99 |
return selectedRows;
|
| 100 |
} |
| 101 |
|
| 102 |
/**
|
| 103 |
* Adds a new entry. In the first place, if it is necessary
|
| 104 |
* changes the selected page and throws the event to actualize the
|
| 105 |
* table and controls. Next it will notify the "add entry" event
|
| 106 |
*
|
| 107 |
* @param entry
|
| 108 |
*/
|
| 109 |
public void addEntry(Object entry) { |
| 110 |
int newSelectedRow = entries.size();
|
| 111 |
|
| 112 |
if(!isInCurrentPage(newSelectedRow)) {
|
| 113 |
setSelectedPage(getPageFromRow(newSelectedRow)); |
| 114 |
setChanged(); |
| 115 |
notifyObservers(EVENT_SELECTED_PAGE); |
| 116 |
} |
| 117 |
|
| 118 |
entries.add(entry); |
| 119 |
setChanged(); |
| 120 |
notifyObservers(EVENT_ADD_ENTRY); |
| 121 |
setSelectedRows(new int[]{newSelectedRow}); |
| 122 |
} |
| 123 |
|
| 124 |
public Object[] getEntry(int row) { |
| 125 |
if(row >= 0 && row < entries.size()) |
| 126 |
return (Object[])entries.get(row); |
| 127 |
return null; |
| 128 |
} |
| 129 |
|
| 130 |
public void removeEntry(int pos) { |
| 131 |
if(pos >= 0 && pos < entries.size()) { |
| 132 |
int oldSelectedPageInRow = getPageFromRow(pos);
|
| 133 |
int oldSelectedPage = getSelectedPageNumber();
|
| 134 |
|
| 135 |
entries.remove(pos); |
| 136 |
|
| 137 |
if(isSelectedRow(pos)) {
|
| 138 |
//La p?gina donde est? la entrada a borrar est? en la p?gina seleccionada
|
| 139 |
if(oldSelectedPageInRow == oldSelectedPage) {
|
| 140 |
int newRowSelected = selectAlternativeRow(pos);
|
| 141 |
int newPageSelected = getPageFromRow(newRowSelected);
|
| 142 |
if(newPageSelected != oldSelectedPage) {
|
| 143 |
setSelectedPage(newPageSelected); |
| 144 |
setChanged(); |
| 145 |
notifyObservers(EVENT_SELECTED_PAGE); |
| 146 |
return;
|
| 147 |
} |
| 148 |
} |
| 149 |
} |
| 150 |
setChanged(); |
| 151 |
notifyObservers(EVENT_REMOVE_ENTRY); |
| 152 |
} |
| 153 |
} |
| 154 |
|
| 155 |
private int selectAlternativeRow(int row) { |
| 156 |
for (int i = 0; i < selectedRows.length; i++) { |
| 157 |
if(selectedRows[i] == row && selectedRows[i] != 0) { |
| 158 |
selectedRows[i] --; |
| 159 |
return selectedRows[i];
|
| 160 |
} |
| 161 |
} |
| 162 |
return row;
|
| 163 |
} |
| 164 |
|
| 165 |
public void swapRow(int i, int j) { |
| 166 |
if(i == j)
|
| 167 |
return;
|
| 168 |
if(j < i) {
|
| 169 |
int aux = i;
|
| 170 |
i = j; |
| 171 |
j = aux; |
| 172 |
} |
| 173 |
|
| 174 |
Object a = entries.get(i);
|
| 175 |
Object b = entries.get(j);
|
| 176 |
entries.add(i, b); |
| 177 |
entries.remove(i + 1);
|
| 178 |
entries.add(j, a); |
| 179 |
entries.remove(j + 1);
|
| 180 |
|
| 181 |
if(!isSelectedRow(j) || !isSelectedRow(i)) { //Si hay solo una seleccionada se intercambia la selecci?n |
| 182 |
for (int k = 0; k < selectedRows.length; k++) { |
| 183 |
if(selectedRows[k] == j) {
|
| 184 |
selectedRows[k] = i; |
| 185 |
setChanged(); |
| 186 |
notifyObservers(EVENT_SELECTED_ROWS); |
| 187 |
break;
|
| 188 |
} |
| 189 |
if(selectedRows[k] == i) {
|
| 190 |
selectedRows[k] = j; |
| 191 |
setChanged(); |
| 192 |
notifyObservers(EVENT_SELECTED_ROWS); |
| 193 |
break;
|
| 194 |
} |
| 195 |
} |
| 196 |
} |
| 197 |
} |
| 198 |
|
| 199 |
public boolean isSelectedRow(int row) { |
| 200 |
if(selectedRows == null) |
| 201 |
return false; |
| 202 |
for (int i = 0; i < selectedRows.length; i++) { |
| 203 |
if(selectedRows[i] == row)
|
| 204 |
return true; |
| 205 |
} |
| 206 |
return false; |
| 207 |
} |
| 208 |
|
| 209 |
public int getEntriesCount() { |
| 210 |
return entries.size();
|
| 211 |
} |
| 212 |
|
| 213 |
public Object[] getLastEntry() { |
| 214 |
return (Object[])entries.get(entries.size() - 1); |
| 215 |
} |
| 216 |
|
| 217 |
public void removeAllEntries() { |
| 218 |
entries.clear(); |
| 219 |
setChanged(); |
| 220 |
notifyObservers(EVENT_REMOVE_ALL); |
| 221 |
} |
| 222 |
|
| 223 |
//*************PAGE**********************
|
| 224 |
|
| 225 |
public void setEntriesPerPage(int n) { |
| 226 |
this.entriesPerPage = n;
|
| 227 |
setChanged(); |
| 228 |
notifyObservers(EVENT_SELECTED_PAGE); |
| 229 |
} |
| 230 |
|
| 231 |
public void increaseSelectedPage() { |
| 232 |
if(selectedPage < getPageCount() - 1) { |
| 233 |
selectedPage ++; |
| 234 |
setChanged(); |
| 235 |
notifyObservers(EVENT_SELECTED_PAGE); |
| 236 |
} |
| 237 |
} |
| 238 |
|
| 239 |
public void decreaseSelectedPage() { |
| 240 |
if (selectedPage > 0) { |
| 241 |
selectedPage --; |
| 242 |
setChanged(); |
| 243 |
notifyObservers(EVENT_SELECTED_PAGE); |
| 244 |
} |
| 245 |
} |
| 246 |
|
| 247 |
public void setSelectedPage(int page) { |
| 248 |
if(page >= 0 && page < getPageCount()) { |
| 249 |
selectedPage = page; |
| 250 |
setChanged(); |
| 251 |
notifyObservers(EVENT_SELECTED_PAGE); |
| 252 |
} |
| 253 |
} |
| 254 |
|
| 255 |
public int getPageFromRow(int row) { |
| 256 |
return (int)(row / getEntriesPerPage()); |
| 257 |
} |
| 258 |
|
| 259 |
public List<Object> getSelectedPage() { |
| 260 |
return getPage(getSelectedPageNumber());
|
| 261 |
} |
| 262 |
|
| 263 |
public void removePage(int page) { |
| 264 |
if(page >= 0 && page < getPageCount()) { |
| 265 |
int init = entriesPerPage * page;
|
| 266 |
int end = init + entriesPerPage;
|
| 267 |
for (int i = end - 1; i >= init; i--) { |
| 268 |
entries.remove(i); |
| 269 |
} |
| 270 |
} |
| 271 |
} |
| 272 |
|
| 273 |
public int getPageCount() { |
| 274 |
return (int)Math.ceil(entries.size() / (double)entriesPerPage); |
| 275 |
} |
| 276 |
|
| 277 |
public boolean isInCurrentPage(int row) { |
| 278 |
int init = selectedPage * getEntriesPerPage();
|
| 279 |
int end = init + getEntriesPerPage() - 1; |
| 280 |
if(row >= init && row <= end)
|
| 281 |
return true; |
| 282 |
return false; |
| 283 |
} |
| 284 |
|
| 285 |
public List<Object> getPage(int page) { |
| 286 |
if(page >= 0 && page < getPageCount()) { |
| 287 |
int init = entriesPerPage * page;
|
| 288 |
int end = init + entriesPerPage;
|
| 289 |
end = end >= entries.size() ? entries.size() : end; |
| 290 |
return entries.subList(init, end);
|
| 291 |
} |
| 292 |
return null; |
| 293 |
} |
| 294 |
|
| 295 |
public int getEntriesPerPage() { |
| 296 |
return entriesPerPage;
|
| 297 |
} |
| 298 |
|
| 299 |
public int getSelectedPageNumber() { |
| 300 |
if(selectedPage >= getPageCount()) {
|
| 301 |
selectedPage = getPageCount() - 1;
|
| 302 |
if(selectedPage < 0) |
| 303 |
selectedPage = 0;
|
| 304 |
} |
| 305 |
return selectedPage;
|
| 306 |
} |
| 307 |
|
| 308 |
} |