テーブルのサイズが変更されたときに列モデルを更新する方法が必要です。
この基本的な例では、このinvaldiate
メソッドを使用して列モデルを更新します。また、列を「サイズ変更不可」として設定します。
これはまた、テーブルメソッドをオーバーライドして、テーブルgetScrollableTracksViewportWidth
が水平方向のスペースを自動的に埋めるようにします。これは、水平スクロールバーが表示されないことを意味します。
public class SpringTable extends JTable {
public SpringTable(TableModel dm) {
super(dm);
setAutoResizeMode(AUTO_RESIZE_OFF);
}
public SpringTable() {
setAutoResizeMode(AUTO_RESIZE_OFF);
}
@Override
public void doLayout() {
int width = getWidth();
int columnCount = getColumnCount();
int columnSize = width / columnCount;
for (int index = 0; index < columnCount; index++) {
TableColumn column = getColumnModel().getColumn(index);
column.setResizable(false);
column.setPreferredWidth(width);
}
super.doLayout();
}
@Override
public boolean getScrollableTracksViewportWidth() {
return true;
}
}
doLayout
代わりにを使用する方が良いかもしれませinvalidate
んが、遊びをして、ニーズに合ったものを確認する必要があります
実行例
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.List;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
public class TestJTable {
public static void main(String[] args) {
new TestJTable();
}
public TestJTable() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
List<Pet> pets = new ArrayList<>(25);
pets.add(new Pet("Tyrannosauridae", "TYRANNOSAURUS", 20, 35));
pets.add(new Pet("Dromaeosauridae", "VELOCIRAPTOR", 45, 90));
pets.add(new Pet("Ceratopsidae", "TRICERATOPS", 15, 30));
pets.add(new Pet("Stegosauridae", "STEGOSAURUS", 22, 25));
pets.add(new Pet("Titanosauridae", "MALAWISAURUS", 22, 25));
pets.add(new Pet("Compsognathidae", "COMPSOGNATHUS", 8, 25));
pets.add(new Pet("Brachiosauridae", "BRACHIOSAURUS", 8, 25));
pets.add(new Pet("Diplodocidae", "DIPLODOCUS", 8, 25));
final PetTableModel model = new PetTableModel(pets);
final JTable table = new SpringTable(model);
InputMap im = table.getInputMap(JTable.WHEN_FOCUSED);
ActionMap am = table.getActionMap();
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0), "delete");
am.put("delete", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
int[] indicies = table.getSelectedRows();
int[] mapped = new int[indicies.length];
for (int index = 0; index < indicies.length; index++) {
mapped[index] = table.convertRowIndexToModel(indicies[index]);
}
model.removePets(mapped);
}
});
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new JScrollPane(table));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class SpringTable extends JTable {
public SpringTable(TableModel dm) {
super(dm);
setAutoResizeMode(AUTO_RESIZE_OFF);
}
public SpringTable() {
setAutoResizeMode(AUTO_RESIZE_OFF);
}
@Override
public void doLayout() {
int width = getWidth();
int columnCount = getColumnCount();
int columnSize = width / columnCount;
for (int index = 0; index < columnCount; index++) {
TableColumn column = getColumnModel().getColumn(index);
column.setResizable(false);
column.setPreferredWidth(width);
}
super.doLayout();
}
@Override
public boolean getScrollableTracksViewportWidth() {
return true;
}
}
public class PetTableModel extends AbstractTableModel {
private List<Pet> pets;
public PetTableModel() {
pets = new ArrayList<>(25);
}
public PetTableModel(List<Pet> pets) {
this.pets = pets;
}
@Override
public int getRowCount() {
return pets.size();
}
public void removePets(int... indicies) {
List<Pet> old = new ArrayList<>(indicies.length);
for (int index : indicies) {
old.add(pets.get(index));
}
for (Pet pet : old) {
int index = pets.indexOf(pet);
pets.remove(pet);
fireTableRowsDeleted(index, index);
}
}
@Override
public Class<?> getColumnClass(int columnIndex) {
Class clazz = String.class;
switch (columnIndex) {
case 2:
case 3:
clazz = Float.class;
}
return clazz;
}
@Override
public String getColumnName(int column) {
String name = "??";
switch (column) {
case 0:
name = "Breed";
break;
case 1:
name = "Category";
break;
case 2:
name = "Buy Price";
break;
case 3:
name = "Sell Price";
break;
}
return name;
}
@Override
public int getColumnCount() {
return 4;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
Pet pet = pets.get(rowIndex);
Object value = null;
switch (columnIndex) {
case 0:
value = pet.getBreed();
break;
case 1:
value = pet.getCategory();
break;
case 2:
value = pet.getBuyPrice();
break;
case 3:
value = pet.getSellPrice();
break;
}
return value;
}
public void add(Pet pet) {
pets.add(pet);
fireTableRowsInserted(getRowCount() - 1, getRowCount() - 1);
}
}
public class Pet {
private String breed;
private String category;
private float buyPrice;
private float sellPrice;
public Pet(String breed, String category, float buyPrice, float sellPrice) {
this.breed = breed;
this.category = category;
this.buyPrice = buyPrice;
this.sellPrice = sellPrice;
}
public String getBreed() {
return breed;
}
public float getBuyPrice() {
return buyPrice;
}
public String getCategory() {
return category;
}
public float getSellPrice() {
return sellPrice;
}
}
}