java JTable中的多行选择
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原文地址: http://stackoverflow.com/questions/4526779/
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Multiple row selection in JTable
提问by sasidhar
I have a JTable, that has one column that is text which is not editable and the second column is a check box that displays boolean values.... Now what i want is, when the user selects multiple rows and unchecks any one of the selected check boxes, then all the check boxes under selection should get unchecked and vice versa.
我有一个 JTable，它有一列是不可编辑的文本，第二列是一个显示布尔值的复选框......现在我想要的是，当用户选择多行并取消选中任何一行时选中的复选框，则选择下的所有复选框都应取消选中，反之亦然。
回答by trashgod
Using @Hovercraft's example and @camickr's advice, the example below shows a suitable user interface. Although it uses buttons, the SelectionActionwould also be suitable for a menu or popup.
使用@Hovercraft 的示例和@camickr 的建议，下面的示例显示了一个合适的用户界面。虽然它使用按钮，但SelectionAction也适用于菜单或弹出窗口。
import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;
import javax.swing.DefaultListSelectionModel;
import javax.swing.table.DefaultTableModel;
/** @see http://stackoverflow.com/questions/4526779 */
public class CheckABunch extends JPanel {
private static final int CHECK_COL = 1;
private static final Object[][] DATA = {
{"One", Boolean.TRUE}, {"Two", Boolean.FALSE},
{"Three", Boolean.TRUE}, {"Four", Boolean.FALSE},
{"Five", Boolean.TRUE}, {"Six", Boolean.FALSE},
{"Seven", Boolean.TRUE}, {"Eight", Boolean.FALSE},
{"Nine", Boolean.TRUE}, {"Ten", Boolean.FALSE}};
private static final String[] COLUMNS = {"Number", "CheckBox"};
private DataModel dataModel = new DataModel(DATA, COLUMNS);
private JTable table = new JTable(dataModel);
private DefaultListSelectionModel selectionModel;
public CheckABunch() {
super(new BorderLayout());
this.add(new JScrollPane(table));
this.add(new ControlPanel(), BorderLayout.SOUTH);
table.setPreferredScrollableViewportSize(new Dimension(250, 175));
selectionModel = (DefaultListSelectionModel) table.getSelectionModel();
}
private class DataModel extends DefaultTableModel {
public DataModel(Object[][] data, Object[] columnNames) {
super(data, columnNames);
}
@Override
public Class<?> getColumnClass(int columnIndex) {
if (columnIndex == CHECK_COL) {
return getValueAt(0, CHECK_COL).getClass();
}
return super.getColumnClass(columnIndex);
}
@Override
public boolean isCellEditable(int row, int column) {
return column == CHECK_COL;
}
}
private class ControlPanel extends JPanel {
public ControlPanel() {
this.add(new JLabel("Selection:"));
this.add(new JButton(new SelectionAction("Clear", false)));
this.add(new JButton(new SelectionAction("Check", true)));
}
}
private class SelectionAction extends AbstractAction {
boolean value;
public SelectionAction(String name, boolean value) {
super(name);
this.value = value;
}
@Override
public void actionPerformed(ActionEvent e) {
for (int i = 0; i < dataModel.getRowCount(); i++) {
if (selectionModel.isSelectedIndex(i)) {
dataModel.setValueAt(value, i, CHECK_COL);
}
}
}
}
private static void createAndShowUI() {
JFrame frame = new JFrame("CheckABunch");
frame.add(new CheckABunch());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
createAndShowUI();
}
});
}
}
回答by camickr
The problem is that when you click on a check box to change the value of the check box, the selection of all the rows will be lost. So you may need to use a right mouse click to display a popup menu that contains select/deselect values.
问题是当你点击一个复选框来改变复选框的值时，所有行的选择都会丢失。因此，您可能需要使用鼠标右键单击来显示包含选择/取消选择值的弹出菜单。
Then you can use table.getSelectedRows(), to get the indexes of all the selected rows you need to update.
然后您可以使用 table.getSelectedRows() 来获取您需要更新的所有选定行的索引。
回答by Hovercraft Full Of Eels
I agree with Roman that his idea would work if you use a class field to hold the min and max selection. For instance:
我同意 Roman 的观点，如果您使用类字段来保存最小和最大选择，他的想法就会奏效。例如：
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
public class CheckABunch extends JPanel {
private static final Object[][] DATA = {{"One", Boolean.TRUE}, {"Two", Boolean.FALSE},
{"Three", Boolean.TRUE}, {"Four", Boolean.FALSE}, {"Five", Boolean.TRUE},
{"Six", Boolean.FALSE}, {"Seven", Boolean.TRUE}, {"Eight", Boolean.FALSE}};
private static final String[] COLUMNS = {"Number", "CheckBox"};
private DefaultTableModel model = new DefaultTableModel(DATA, COLUMNS) {
@Override
public Class<?> getColumnClass(int columnIndex) {
if (columnIndex == 1) {
return getValueAt(0, 1).getClass();
}
return super.getColumnClass(columnIndex);
}
};
private JTable table = new JTable(model);
private int minSelectedRow = -1;
private int maxSelectedRow = -1;
boolean tableModelListenerIsChanging = false;
public CheckABunch() {
add(new JScrollPane(table));
table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
if (e.getValueIsAdjusting()) {
return;
}
minSelectedRow = ((DefaultListSelectionModel) e.getSource()).getMinSelectionIndex();
maxSelectedRow = ((DefaultListSelectionModel) e.getSource()).getMaxSelectionIndex();
}
});
model.addTableModelListener(new TableModelListener() {
public void tableChanged(TableModelEvent e) {
if (tableModelListenerIsChanging) {
return;
}
int firstRow = e.getFirstRow();
int column = e.getColumn();
if (column != 1 || maxSelectedRow == -1 || minSelectedRow == -1) {
return;
}
tableModelListenerIsChanging = true;
boolean value = ((Boolean)model.getValueAt(firstRow, column)).booleanValue();
for (int i = minSelectedRow; i <= maxSelectedRow; i++) {
model.setValueAt(Boolean.valueOf(value), i, column);
}
// *** edit: added two lines
minSelectedRow = -1;
maxSelectedRow = -1;
tableModelListenerIsChanging = false;
}
});
}
private static void createAndShowUI() {
JFrame frame = new JFrame("CheckABunch");
frame.getContentPane().add(new CheckABunch());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
createAndShowUI();
}
});
}
}
回答by Roman
You can get the selection interval with code similar to this:
您可以使用类似于此的代码获取选择间隔：
table.getSelectionModel().addListSelectionListener(new ListSelectionListener(){
public void valueChanged(ListSelectionEvent e) {
minSelectedRow = ((DefaultListSelectionModel)e.getSource()).getMinSelectionIndex();
maxSelectedRow = ((DefaultListSelectionModel)e.getSource()).getMaxSelectionIndex();
}
});
Then, when one checkbox is checked (listen to ItemEvent) you should iterate from the minSelectedRowto the maxSelectedRowand change checked boxes state. That's it.
然后，当一个复选框被选中（听ItemEvent）时，您应该从minSelectedRow到迭代maxSelectedRow并更改选中的框状态。而已。
