JTable
列のタイプがBoolean.class
の場合、 デフォルトのレンダラー はJCheckBox
です。 ユーザー選択 に基づいて個々のセルを選択するのは簡単ですが、選択するのが便利な場合がありますすべてのチェックボックス、またはすべてのチェックボックスも同様です。これらの recentexamples は、テーブルヘッダーでJCheckBox
を使用して言及しましたが、実装は面倒で魅力的ではありませんでした。列を並べ替える必要がない場合、正常に動作するコントロールを JTableHeader
に配置するにはどうすればよいですか?
補遺:便宜上、 sscce を answer として追加しましたが、その回答を喜んで受け入れます問題の適切に動作する側面に対処します。
問題には2つの部分があります(私が見るように:-)
使いやすさ:UIの相互作用/要素を発明すると、ユーザーが混乱する傾向があります。順不同:
ですから、相互作用分析が明らかに私たちがやる必要がある/望んでいる場合でも、
技術的側面
記事 テーブルの使用方法:カスタムレンダラーの使用法 は TableSorter
asを提供しています列ヘッダーでマウスイベントを検出する方法の例。同様のアプローチを使用して、SelectAllHeader extends JToggleButton
およびimplements TableCellRenderer
以下の例では、同様の効果を実現しています。 TableModelListener
は、すべてのチェックボックスが均一な状態のときにトグルボタンを調整するために使用されます。
import Java.awt.*;
import Java.awt.event.*;
import javax.swing.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.*;
/**
* @see http://stackoverflow.com/questions/7137786
* @see http://stackoverflow.com/questions/7092219
* @see http://stackoverflow.com/questions/7093213
*/
public class SelectAllHeaderTest {
private static final int BOOLEAN_COL = 2;
private static final Object colNames[] = {"Column 1", "Column 2", ""};
private DefaultTableModel model = new DefaultTableModel(null, colNames) {
@Override
public Class<?> getColumnClass(int columnIndex) {
if (columnIndex == BOOLEAN_COL) {
return Boolean.class;
} else {
return String.class;
}
}
};
private JTable table = new JTable(model);
public void create() {
for (int x = 1; x < 6; x++) {
model.addRow(new Object[]{
"Row " + x + ", Col 1", "Row " + x + ", Col 2", false
});
}
table.setAutoCreateRowSorter(true);
table.setPreferredScrollableViewportSize(new Dimension(320, 160));
TableColumn tc = table.getColumnModel().getColumn(BOOLEAN_COL);
tc.setHeaderRenderer(new SelectAllHeader(table, BOOLEAN_COL));
JFrame f = new JFrame();
f.add(new JScrollPane(table));
f.pack();
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new SelectAllHeaderTest().create();
}
});
}
}
/**
* A TableCellRenderer that selects all or none of a Boolean column.
*
* @param targetColumn the Boolean column to manage
*/
class SelectAllHeader extends JToggleButton implements TableCellRenderer {
private static final String ALL = "✓ Select all";
private static final String NONE = "✓ Select none";
private JTable table;
private TableModel tableModel;
private JTableHeader header;
private TableColumnModel tcm;
private int targetColumn;
private int viewColumn;
public SelectAllHeader(JTable table, int targetColumn) {
super(ALL);
this.table = table;
this.tableModel = table.getModel();
if (tableModel.getColumnClass(targetColumn) != Boolean.class) {
throw new IllegalArgumentException("Boolean column required.");
}
this.targetColumn = targetColumn;
this.header = table.getTableHeader();
this.tcm = table.getColumnModel();
this.applyUI();
this.addItemListener(new ItemHandler());
header.addMouseListener(new MouseHandler());
tableModel.addTableModelListener(new ModelHandler());
}
@Override
public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
return this;
}
private class ItemHandler implements ItemListener {
@Override
public void itemStateChanged(ItemEvent e) {
boolean state = e.getStateChange() == ItemEvent.SELECTED;
setText((state) ? NONE : ALL);
for (int r = 0; r < table.getRowCount(); r++) {
table.setValueAt(state, r, viewColumn);
}
}
}
@Override
public void updateUI() {
super.updateUI();
applyUI();
}
private void applyUI() {
this.setFont(UIManager.getFont("TableHeader.font"));
this.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
this.setBackground(UIManager.getColor("TableHeader.background"));
this.setForeground(UIManager.getColor("TableHeader.foreground"));
}
private class MouseHandler extends MouseAdapter {
@Override
public void mouseClicked(MouseEvent e) {
viewColumn = header.columnAtPoint(e.getPoint());
int modelColumn = tcm.getColumn(viewColumn).getModelIndex();
if (modelColumn == targetColumn) {
doClick();
}
}
}
private class ModelHandler implements TableModelListener {
@Override
public void tableChanged(TableModelEvent e) {
if (needsToggle()) {
doClick();
header.repaint();
}
}
}
// Return true if this toggle needs to match the model.
private boolean needsToggle() {
boolean allTrue = true;
boolean allFalse = true;
for (int r = 0; r < tableModel.getRowCount(); r++) {
boolean b = (Boolean) tableModel.getValueAt(r, targetColumn);
allTrue &= b;
allFalse &= !b;
}
return allTrue && !isSelected() || allFalse && isSelected();
}
}
カスタムTableCellRendererを使用します。
// column 1
col = table.getColumnModel().getColumn(1);
col.setHeaderRenderer(new EditableHeaderRenderer( new JButton("Button")));
// column 2
col = table.getColumnModel().getColumn(2);
col.setHeaderRenderer(new EditableHeaderRenderer( new JToggleButton("Toggle")));
// column 3
col = table.getColumnModel().getColumn(3);
col.setHeaderRenderer(new EditableHeaderRenderer( new JCheckBox("CheckBox")));
class EditableHeaderRenderer implements TableCellRenderer {
private JTable table = null;
private MouseEventReposter reporter = null;
private JComponent editor;
EditableHeaderRenderer(JComponent editor) {
this.editor = editor;
this.editor.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
}
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col) {
if (table != null && this.table != table) {
this.table = table;
final JTableHeader header = table.getTableHeader();
if (header != null) {
this.editor.setForeground(header.getForeground());
this.editor.setBackground(header.getBackground());
this.editor.setFont(header.getFont());
reporter = new MouseEventReposter(header, col, this.editor);
header.addMouseListener(reporter);
}
}
if (reporter != null) reporter.setColumn(col);
return this.editor;
}
static public class MouseEventReposter extends MouseAdapter {
private Component dispatchComponent;
private JTableHeader header;
private int column = -1;
private Component editor;
public MouseEventReposter(JTableHeader header, int column, Component editor) {
this.header = header;
this.column = column;
this.editor = editor;
}
public void setColumn(int column) {
this.column = column;
}
private void setDispatchComponent(MouseEvent e) {
int col = header.getTable().columnAtPoint(e.getPoint());
if (col != column || col == -1) return;
Point p = e.getPoint();
Point p2 = SwingUtilities.convertPoint(header, p, editor);
dispatchComponent = SwingUtilities.getDeepestComponentAt(editor, p2.x, p2.y);
}
private boolean repostEvent(MouseEvent e) {
if (dispatchComponent == null) {
return false;
}
MouseEvent e2 = SwingUtilities.convertMouseEvent(header, e, dispatchComponent);
dispatchComponent.dispatchEvent(e2);
return true;
}
@Override
public void mousePressed(MouseEvent e) {
if (header.getResizingColumn() == null) {
Point p = e.getPoint();
int col = header.getTable().columnAtPoint(p);
if (col != column || col == -1) return;
int index = header.getColumnModel().getColumnIndexAtX(p.x);
if (index == -1) return;
editor.setBounds(header.getHeaderRect(index));
header.add(editor);
editor.validate();
setDispatchComponent(e);
repostEvent(e);
}
}
@Override
public void mouseReleased(MouseEvent e) {
repostEvent(e);
dispatchComponent = null;
header.remove(editor);
}
}
}
ポップアップメニューのあるコンポーネント(JComboBoxやJMenuなど)はうまく機能しないことに注意してください。参照: JComboBoxがJTable TableHeaderで展開に失敗 )。ただし、TableHeaderで MenuButton を使用できます。
class MenuButtonTableHeaderRenderer extends JPanel implements TableCellRenderer {
private int column = -1;
private JTable table = null;
private MenuButton b;
MenuButtonTableHeaderRenderer(String name, JPopupMenu menu) {
super(new BorderLayout());
b = new MenuButton(ResourceManager.ARROW_BOTTOM, menu);
b.setBorder(BorderFactory.createEmptyBorder(1,1,1,1));
JLabel l = new JLabel(name);
l.setFont(l.getFont().deriveFont(Font.PLAIN));
l.setBorder(BorderFactory.createEmptyBorder(1,5,1,1));
add(b, BorderLayout.WEST);
add(l, BorderLayout.CENTER);
setBorder(UIManager.getBorder("TableHeader.cellBorder"));
}
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col) {
if (table != null && this.table != table) {
this.table = table;
final JTableHeader header = table.getTableHeader();
if (header != null) {
setForeground(header.getForeground());
setBackground(header.getBackground());
setFont(header.getFont());
header.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
int col = header.getTable().columnAtPoint(e.getPoint());
if (col != column || col == -1) return;
int index = header.getColumnModel().getColumnIndexAtX(e.getPoint().x);
if (index == -1) return;
setBounds(header.getHeaderRect(index));
header.add(MenuButtonTableHeaderRenderer.this);
validate();
b.doClick();
header.remove(MenuButtonTableHeaderRenderer.this);
header.repaint();
}
});
}
}
column = col;
return this;
}
}