---
category: swing
folder: CheckableComboBoxEditor
title: JComboBoxのComboBoxEditorに編集可能なJCheckBoxを追加する
tags: [JComboBox, ComboBoxEditor, JCheckBox]
author: aterai
pubdate: 2018-11-05T16:25:10+09:00
description: JComboBoxを編集可能に設定し、ComboBoxEditorとして複数のJCheckBoxとJTextFieldを配置したJPanelを設定します。
image: https://drive.google.com/uc?id=1f3vhPqkXg-Jg6AK0p01Pn7aGRTo-Wlv0pw
hreflang:
href: https://java-swing-tips.blogspot.com/2018/11/add-editable-jcheckbox-to.html
lang: en
---
* 概要 [#summary]
`JComboBox`を編集可能に設定し、`ComboBoxEditor`として複数の`JCheckBox`と`JTextField`を配置した`JPanel`を設定します。
#download(https://drive.google.com/uc?id=1f3vhPqkXg-Jg6AK0p01Pn7aGRTo-Wlv0pw)
* サンプルコード [#sourcecode]
#code(link){{
class CheckComboBoxEditor implements ComboBoxEditor {
private final EditorPanel editor = new EditorPanel(new ComboItem());
@Override public void selectAll() {
editor.selectAll();
}
@Override public Object getItem() {
return editor.getItem();
}
@Override public void setItem(Object anObject) {
EventQueue.invokeLater(() -> {
Container c = SwingUtilities.getAncestorOfClass(
JComboBox.class, getEditorComponent());
if (c instanceof JComboBox) {
JComboBox<?> combo = (JComboBox<?>) c;
int idx = combo.getSelectedIndex();
if (idx >= 0 && idx != editor.getEditingIndex()) {
System.out.println("setItem: " + idx);
editor.setEditingIndex(idx);
}
}
});
if (anObject instanceof ComboItem) {
editor.setItem((ComboItem) anObject);
} else {
editor.setItem(new ComboItem());
}
}
@Override public Component getEditorComponent() {
return editor;
}
@Override public void addActionListener(ActionListener l) {
editor.addActionListener(l);
}
@Override public void removeActionListener(ActionListener l) {
editor.removeActionListener(l);
}
}
final class EditorPanel extends JPanel {
private final JCheckBox enabledCheck = new JCheckBox();
private final JCheckBox editableCheck = new JCheckBox();
private final JTextField textField = new JTextField("", 16);
private final transient ComboItem data;
private int editingIndex = -1;
protected EditorPanel(ComboItem data) {
super();
this.data = data;
setItem(data);
enabledCheck.addActionListener(e -> {
Container c = SwingUtilities.getAncestorOfClass(JComboBox.class, this);
if (c instanceof JComboBox) {
JComboBox<?> combo = (JComboBox<?>) c;
ComboItem item = (ComboItem) combo.getItemAt(editingIndex);
item.setEnabled(((JCheckBox) e.getSource()).isSelected());
editableCheck.setEnabled(item.isEnabled());
textField.setEnabled(item.isEnabled());
combo.setSelectedIndex(editingIndex);
}
});
enabledCheck.setOpaque(false);
enabledCheck.setFocusable(false);
editableCheck.addActionListener(e -> {
Container c = SwingUtilities.getAncestorOfClass(JComboBox.class, this);
if (c instanceof JComboBox) {
JComboBox<?> combo = (JComboBox<?>) c;
ComboItem item = (ComboItem) combo.getItemAt(editingIndex);
item.setEditable(((JCheckBox) e.getSource()).isSelected());
textField.setEditable(item.isEditable());
combo.setSelectedIndex(editingIndex);
}
});
editableCheck.setOpaque(false);
editableCheck.setFocusable(false);
textField.addActionListener(e -> {
Container c = SwingUtilities.getAncestorOfClass(JComboBox.class, this);
if (c instanceof JComboBox) {
JComboBox<?> combo = (JComboBox<?>) c;
ComboItem item = (ComboItem) combo.getItemAt(editingIndex);
item.setText(((JTextField) e.getSource()).getText());
combo.setSelectedIndex(editingIndex);
}
});
textField.setBorder(BorderFactory.createEmptyBorder());
textField.setOpaque(false);
setOpaque(false);
setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
add(enabledCheck);
add(editableCheck);
add(textField);
}
public int getEditingIndex() {
return editingIndex;
}
public void setEditingIndex(int idx) {
this.editingIndex = idx;
}
public ComboItem getItem() {
data.setEnabled(enabledCheck.isSelected());
data.setEditable(editableCheck.isSelected());
data.setText(textField.getText());
return data;
}
public void setItem(ComboItem item) {
enabledCheck.setSelected(item.isEnabled());
editableCheck.setSelected(item.isEditable());
editableCheck.setEnabled(item.isEnabled());
textField.setText(item.getText());
textField.setEnabled(item.isEnabled());
textField.setEditable(item.isEditable());
}
public void selectAll() {
textField.requestFocusInWindow();
textField.selectAll();
}
public void addActionListener(ActionListener l) {
textField.addActionListener(l);
enabledCheck.addActionListener(l);
editableCheck.addActionListener(l);
}
public void removeActionListener(ActionListener l) {
textField.removeActionListener(l);
enabledCheck.removeActionListener(l);
editableCheck.removeActionListener(l);
}
}
}}
* 解説 [#explanation]
- `setEditable(false), setRenderer(...)`
-- 編集不可の`JComboBox`にレンダラーとして複数の`JCheckBox`と`JTextField`を配置した`JPanel`を使用
-- 編集不可の`JComboBox`やドロップダウンリストの描画にのみ(このためイベントなどは無効)レンダラーとして設定した`JPanel`が使用される
#code{{
class CheckComboBoxRenderer<E extends ComboItem> implements ListCellRenderer<E> {
private static final Color SBGC = new Color(100, 200, 255);
private final EditorPanel renderer = new EditorPanel(new ComboItem());
@Override public Component getListCellRendererComponent(
JList<? extends E> list, E value, int index,
boolean isSelected, boolean cellHasFocus) {
renderer.setItem(value);
if (isSelected && index >= 0) {
renderer.setOpaque(true);
renderer.setBackground(SBGC);
} else {
renderer.setOpaque(false);
renderer.setBackground(Color.WHITE);
}
return renderer;
}
}
}}
- `setEditable(true), setRenderer(...), setEditor(...)`
-- 編集可能な`JComboBox`にレンダラーとエディタとして複数の`JCheckBox`と`JTextField`を配置した`JPanel`を使用
-- 編集可能な`JComboBox`のエディタとして設定した`JPanel`がそのまま使用されるため`JCheckBox`などに設定した`ActionListener`なども有効
--- 左`JCeckBox`: 右`JCeckBox`と`JTextField`の`setEnabled(...)`を切り替える
--- 右`JCeckBox`: `JTextField`の`setEditable(...)`を切り替える
--- 左`JCheckBox`: 右`JCheckBox`と`JTextField`の`setEnabled(...)`を切り替える
--- 右`JCheckBox`: `JTextField`の`setEditable(...)`を切り替える
* 参考リンク [#reference]
- [[JComboBoxのEditorComponentにJButtonを配置>Swing/ButtonInComboEditor]]
- [[JComboBoxのアイテムとして表示したJCheckBoxを複数選択する>Swing/CheckedComboBox]]
- [https://stackoverflow.com/questions/53037906/using-the-comboboxeditor-interface-with-custom-jcomponent-and-allow-edit-and-d java - Using the ComboBoxEditor interface with Custom JComponent, and allow edit, and display the List - Stack Overflow]
* コメント [#comment]
#comment
#comment