JTableのCellにJCheckBoxを複数配置する
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Posted by aterai at
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概要
JTable
のセル中にJCheckBox
を複数個配置します。
Screenshot
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サンプルコード
class CheckBoxesPanel extends JPanel {
private static final String OSNAME = System.getProperty("os.name");
protected final String[] title = {"r", "w", "x"};
public JCheckBox[] buttons;
public CheckBoxesPanel() {
super();
setOpaque(false);
setBackground(new Color(0x0, true));
setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
initButtons();
}
protected void initButtons() {
buttons = new JCheckBox[title.length];
for (int i = 0; i < buttons.length; i++) {
JCheckBox b = new JCheckBox(title[i]);
b.setOpaque(false);
b.setFocusable(false);
b.setRolloverEnabled(false);
b.setBackground(new Color(0x0, true));
buttons[i] = b;
add(b);
add(Box.createHorizontalStrut(5));
}
}
protected void updateButtons(Object v) {
if ("Windows 7".equals(OSNAME)) { //Windows aero?
removeAll();
initButtons();
}
Integer i = (Integer) (v == null ? 0 : v);
buttons[0].setSelected((i & (1 << 2)) != 0);
buttons[1].setSelected((i & (1 << 1)) != 0);
buttons[2].setSelected((i & (1 << 0)) != 0);
}
}
class CheckBoxesRenderer extends CheckBoxesPanel
implements TableCellRenderer, Serializable {
public CheckBoxesRenderer() {
super();
setName("Table.cellRenderer");
}
@Override public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus, int row, int column) {
updateButtons(value);
return this;
}
public static class UIResource extends CheckBoxesRenderer implements UIResource {}
}
class CheckBoxesEditor extends CheckBoxesPanel
implements TableCellEditor, Serializable {
public CheckBoxesEditor() {
ActionListener al = new ActionListener() {
@Override public void actionPerformed(ActionEvent e) {
fireEditingStopped();
}
};
ActionMap am = getActionMap();
for (int i = 0; i < buttons.length; i++) {
final JCheckBox b = buttons[i];
b.addActionListener(al);
am.put(title[i], new AbstractAction(title[i]) {
@Override public void actionPerformed(ActionEvent e) {
b.setSelected(!b.isSelected());
fireEditingStopped();
}
});
}
InputMap im = getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_R, 0), title[0]);
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_W, 0), title[1]);
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_X, 0), title[2]);
}
@Override public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column) {
updateButtons(value);
return this;
}
@Override public Object getCellEditorValue() {
int i = 0;
if (buttons[0].isSelected()) i |= 1 << 2;
if (buttons[1].isSelected()) i |= 1 << 1;
if (buttons[2].isSelected()) i |= 1 << 0;
return i;
}
// Copied from AbstractCellEditor
protected EventListenerList listenerList = new EventListenerList();
transient protected ChangeEvent changeEvent = null;
// ...
View in GitHub: Java, Kotlin解説
JTable
のセル内に3
つのJCheckBox
を配置したJPanel
を作成- この
JPanel
をCellRenderer
用とCellEditor
用として別々に使用
- この
JCheckBox
をマウスでクリックすると直下にあるJCheckBox
の選択状態のみ更新- 編集中にカラムヘッダの移動やリサイズ(
JFrame
などのリサイズに連動)などが発生してもチェックした内容がリセットされないようにCellEditor
のチェックボックスがクリックされたらfireEditingStopped()
メソッドを呼び出して編集を終了し更新を確定する