如何在Jlist中添加两列？ [英] How to add two columns in a Jlist?
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问题描述
我找到了一个双 JList 示例代码，但我需要 Jlist 中的两列。
如何在 Jlist 中添加两列？
我尝试使用 ListCellRenderer ，但我没有向模型添加元素。
主框架......
公共类DualTableFrame扩展JFrame {
私有JTable leftTable;
私有JTable rightTable;
private JButton addButton;
private JButton removeButton;
public DualTableFrame（）{
setTitle（双持表）;
setDefaultCloseOperation（EXIT_ON_CLOSE）;
setLayout（new GridBagLayout（））;
leftTable = new JTable（new SimpleColorTableModel（））;
rightTable = new JTable（new SimpleColorTableModel（））;
setupTable（leftTable）;
setupTable（rightTable）;
populate（（SimpleColorTableModel）leftTable.getModel（））;
addButton = new JButton（Add>>）;
removeButton = new JButton（<< Remove）;
JPanel pnlActions = new JPanel（new GridBagLayout（））;
GridBagConstraints gbc = new GridBagConstraints（）;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.fill = GridBagConstraints.HORIZONTAL;
pnlActions.add（addButton，gbc）;
gbc.gridy ++;
pnlActions.add（removeButton，gbc）;
gbc = new GridBagConstraints（）;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 0.33;
gbc.fill = GridBagConstraints.HORIZONTAL;
add（new JLabel（Available Choices），gbc）;
gbc.gridx ++;
add（new JPanel（），gbc）;
gbc.gridx ++;
add（new JLabel（Your Choices），gbc）;
gbc.gridy ++;
gbc.gridx = 0;
gbc.weighty ++;
gbc.fill = GridBagConstraints.BOTH;
add（new JScrollPane（leftTable），gbc）;
gbc.gridx ++;
add（pnlActions，gbc）;
gbc.gridx ++;
add（new JScrollPane（rightTable），gbc）;
setSize（400,600）;
addButton.setEnabled（false）;
removeButton.setEnabled（false）;
leftTable.getSelectionModel（）。addListSelectionListener（new ListSelectionListener（）{
@Override
public void valueChanged（ListSelectionEvent e）{
int count = leftTable.getSelectedRowCount（）;
addButton.setEnabled（count> 0）;
}
}）;
rightTable.getSelectionModel（）。addListSelectionListener（new ListSelectionListener（）{
@Override
public void valueChanged（ListSelectionEvent e）{
int count = rightTable.getSelectedRowCount（ ）;
removeButton.setEnabled（count> 0）;
}
}）;
addButton.addActionListener（new ActionListener（）{
@Override
public void actionPerformed（ActionEvent e）{
moveSelectedRow（leftTable，rightTable）;
}
}）;
removeButton.addActionListener（new ActionListener（）{
@Override
public void actionPerformed（ActionEvent e）{
moveSelectedRow（rightTable，leftTable）;
}
}）;
}
protected void moveSelectedRow（JTable from，JTable to）{
SimpleColorTableModel fromModel =（SimpleColorTableModel）from.getModel（）;
SimpleColorTableModel toModel =（SimpleColorTableModel）to.getModel（）;
for（int index：from.getSelectedRows（））{
Vector rowValue =（Vector）fromModel.getDataVector（）。get（index）;
toModel.addRow（rowValue）;
}
int selectedRow = -1;
while（（selectedRow = from.getSelectedRow（））！= -1）{
fromModel.removeRow（selectedRow）;
}
from.clearSelection（）;
}
protected void populate（SimpleColorTableModel model）{
model.addRow（new Object [] {Black，Color.BLACK} ）;
model.addRow（new Object [] {Blue，Color.BLUE}）;
model.addRow（new Object [] {Cyan，Color.CYAN}）;
model.addRow（new Object [] {Dark Grey，Color.DARK_GRAY}）;
model.addRow（new Object [] {Gray，Color.GRAY}）;
model.addRow（new Object [] {Green，Color.GREEN}）;
model.addRow（new Object [] {Light Gary，Color.LIGHT_GRAY}）;
model.addRow（new Object [] {Mangenta，Color.MAGENTA}）;
model.addRow（new Object [] {Orange，Color.ORANGE}）;
model.addRow（new Object [] {Pink，Color.PINK}）;
model.addRow（new Object [] {Red，Color.RED}）;
model.addRow（new Object [] {White，Color.WHITE}）;
model.addRow（new Object [] {Yellow，Color.YELLOW}）;
}
protected void setupTable（JTable table）{
table.setFillsViewportHeight（true）;
table.setDefaultRenderer（Color.class，new ColorTableCellRenderer（））;
}
}
表格单元格渲染器
公共类ColorTableCellRenderer extends DefaultTableCellRenderer {
@Override
public Component getTableCellRendererComponent（JTable table，Object value ，boolean isSelected，boolean hasFocus，int row，int column）{
super.getTableCellRendererComponent（table，value，isSelected，hasFocus，row，column）;
setText（null）;
if（value instanceof Color）{
setOpaque（true）;
setBackground（（Color）value）;
}
返回此项;
}
}
表模型
public class SimpleColorTableModel extends DefaultTableModel {
public SimpleColorTableModel（）{
addColumn（Name）;
addColumn（Color）;
}
@Override
public Class<？> getColumnClass（int columnIndex）{
Class clazz = String.class;
switch（columnIndex）{
case 1：
clazz = Color.class;
休息;
}
返回clazz;
}
}
I found a Dual JList sample code, but I need two columns in a Jlist.
How to add two columns in a Jlist?
I tried to use ListCellRenderer, but I failed to add elements to the model.
Here's the code show in webpage with image.
解决方案
You mean something like this?
I'd start by having a read through How to Use Tables
The Main frame...
public class DualTableFrame extends JFrame {
private JTable leftTable;
private JTable rightTable;
private JButton addButton;
private JButton removeButton;
public DualTableFrame() {
setTitle("Dual wielding tables");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLayout(new GridBagLayout());
leftTable = new JTable(new SimpleColorTableModel());
rightTable = new JTable(new SimpleColorTableModel());
setupTable(leftTable);
setupTable(rightTable);
populate((SimpleColorTableModel) leftTable.getModel());
addButton = new JButton("Add >>");
removeButton = new JButton("<< Remove");
JPanel pnlActions = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.fill = GridBagConstraints.HORIZONTAL;
pnlActions.add(addButton, gbc);
gbc.gridy++;
pnlActions.add(removeButton, gbc);
gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 0.33;
gbc.fill = GridBagConstraints.HORIZONTAL;
add(new JLabel("Available Choices"), gbc);
gbc.gridx++;
add(new JPanel(), gbc);
gbc.gridx++;
add(new JLabel("Your Choices"), gbc);
gbc.gridy++;
gbc.gridx = 0;
gbc.weighty++;
gbc.fill = GridBagConstraints.BOTH;
add(new JScrollPane(leftTable), gbc);
gbc.gridx++;
add(pnlActions, gbc);
gbc.gridx++;
add(new JScrollPane(rightTable), gbc);
setSize(400, 600);
addButton.setEnabled(false);
removeButton.setEnabled(false);
leftTable.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent e) {
int count = leftTable.getSelectedRowCount();
addButton.setEnabled(count > 0);
}
});
rightTable.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent e) {
int count = rightTable.getSelectedRowCount();
removeButton.setEnabled(count > 0);
}
});
addButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
moveSelectedRow(leftTable, rightTable);
}
});
removeButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
moveSelectedRow(rightTable, leftTable);
}
});
}
protected void moveSelectedRow(JTable from, JTable to) {
SimpleColorTableModel fromModel = (SimpleColorTableModel) from.getModel();
SimpleColorTableModel toModel = (SimpleColorTableModel) to.getModel();
for (int index : from.getSelectedRows()) {
Vector rowValue = (Vector) fromModel.getDataVector().get(index);
toModel.addRow(rowValue);
}
int selectedRow = -1;
while ((selectedRow = from.getSelectedRow()) != -1) {
fromModel.removeRow(selectedRow);
}
from.clearSelection();
}
protected void populate(SimpleColorTableModel model) {
model.addRow(new Object[]{"Black", Color.BLACK});
model.addRow(new Object[]{"Blue", Color.BLUE});
model.addRow(new Object[]{"Cyan", Color.CYAN});
model.addRow(new Object[]{"Dark Gray", Color.DARK_GRAY});
model.addRow(new Object[]{"Gray", Color.GRAY});
model.addRow(new Object[]{"Green", Color.GREEN});
model.addRow(new Object[]{"Light Gary", Color.LIGHT_GRAY});
model.addRow(new Object[]{"Mangenta", Color.MAGENTA});
model.addRow(new Object[]{"Orange", Color.ORANGE});
model.addRow(new Object[]{"Pink", Color.PINK});
model.addRow(new Object[]{"Red", Color.RED});
model.addRow(new Object[]{"White", Color.WHITE});
model.addRow(new Object[]{"Yellow", Color.YELLOW});
}
protected void setupTable(JTable table) {
table.setFillsViewportHeight(true);
table.setDefaultRenderer(Color.class, new ColorTableCellRenderer());
}
}
The Table cell renderer
public class ColorTableCellRenderer extends DefaultTableCellRenderer {
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
setText(null);
if (value instanceof Color) {
setOpaque(true);
setBackground((Color)value);
}
return this;
}
}
The table model
public class SimpleColorTableModel extends DefaultTableModel {
public SimpleColorTableModel() {
addColumn("Name");
addColumn("Color");
}
@Override
public Class<?> getColumnClass(int columnIndex) {
Class clazz = String.class;
switch (columnIndex) {
case 1:
clazz = Color.class;
break;
}
return clazz;
}
}
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