所以我在 JTable 中实现了它。
请注意,此解决方案有几个缺点:
- 您不能使用table.getListSelectionModel来选择行,您需要调用table.addRowSelectionInterval
- 尝试选择选定块旁边的另一列将取消选择行
- 我没有测试列选择,但我的猜测是它不起作用
- 选择块时改变方向并不总是有效
但对于其余部分,它几乎可以满足我的需求
/*
* Copyright 2013 Japplis.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.awt.Point;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import javax.swing.JTable;
import javax.swing.table.TableModel;
/**
* The JTable used to display data.
* This class is only to fix bugs or improve existing functionalities.
*
* @author Anthony Goubard - Japplis
*/
public class SheetTable extends JTable {
private Map<Integer, Set<Integer>> selectedCells = new HashMap<>();
private Point firstExtendCell;
public SheetTable(TableModel tableModel) {
super(tableModel);
}
@Override
public void changeSelection(int rowIndex, int columnIndex, boolean toggle, boolean extend) {
if (toggle && isCellSelected(rowIndex, columnIndex) && !extend) {
selectedCells.get(rowIndex).remove(columnIndex);
} else {
if (!toggle && !extend) {
selectedCells.clear();
}
Set<Integer> selectedColumns = selectedCells.get(rowIndex);
if (selectedColumns == null) {
selectedColumns = new TreeSet<>();
selectedCells.put(rowIndex, selectedColumns);
}
selectedColumns.add(columnIndex);
if (!extend) {
firstExtendCell = new Point(rowIndex, columnIndex);
} else {
for (int i = Math.min(firstExtendCell.x, rowIndex); i <= Math.max(firstExtendCell.x, rowIndex); i++) {
for (int j = Math.min(firstExtendCell.y, columnIndex); j <= Math.max(firstExtendCell.y, columnIndex); j++) {
selectedCells.get(i).add(j);
}
}
}
}
super.changeSelection(rowIndex, columnIndex, toggle, extend);
}
@Override
public void addRowSelectionInterval(int index0, int index1) {
for (int i = index0; i < index1; i++) {
selectedCells.remove(i);
}
super.addRowSelectionInterval(index0, index1);
}
@Override
public void removeRowSelectionInterval(int index0, int index1) {
for (int i = index0; i < index1; i++) {
selectedCells.remove(i);
}
super.removeRowSelectionInterval(index0, index1);
}
@Override
public void selectAll() {
selectedCells.clear();
super.selectAll();
}
@Override
public void clearSelection() {
if (selectedCells != null) {
selectedCells.clear();
}
super.clearSelection();
}
@Override
public boolean isCellSelected(int row, int column) {
if (!getSelectionModel().isSelectedIndex(row)) {
return false;
}
if (getSelectionModel().isSelectedIndex(row) && selectedCells.get(row) == null) {
return true;
}
return selectedCells.get(row).contains(column);
}
}
最后一个版本位于bitbucket.org上的 Joeffice Mercurial 存储库中