1

カスタム コンボ ボックスの値にツールチップ値を設定したいと思います。基本的に、私のコンボボックスには人々のイニシャルのリストが含まれています - 彼らが上にマウスを置くと、その人のフルネームを表示したいのです。私のコンボ ボックスは基本的に、独自の TableCellRenderer と DefaultCellEditor を持つ JTable のセル/列です。リストは JList (モデル内の内部クラス) です。「setToolTipText」メソッドを直接設定しようとしましたが、うまくいかないようです。

コードは次のとおりです。

*JTable 内のコード: *

public void setupUserCombo(Container container){
      TableColumn col = getColumnModel().getColumn(3);
      Set<ComboUser> values = new LinkedHashSet<ComboUser>();

      ComboUser comboUser = new ComboUser(new User("Test User"));
      values.add(comboUser);

      col.setCellEditor(new MyComboBoxEditor((ComboUser[])values.toArray(new ComboUser[0])));
      col.setCellRenderer(new MyComboBoxRenderer((ComboUser[])values.toArray(new ComboUser[0])));
      repaint();
}

public class MyComboBoxRenderer extends JComboBox implements TableCellRenderer {
    private static final long serialVersionUID = 1L;

    public MyComboBoxRenderer(ComboUser[] items) {
        super(items);
        repaint();
    }

    public Component getTableCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int row, int column) {
        if (value != null){
            System.out.println("Setting tooltip");
            ((ComboUser)value).setToolTipText("TESTING!!");
        }
        setSelectedItem(value);

        return this;
    }
}

public class MyComboBoxEditor extends DefaultCellEditor {
    private static final long serialVersionUID = 1L;

    public MyComboBoxEditor(ComboUser[] items) {
        super(new JComboBox(items));
    }
}

*モデル内のサブクラス: *

public class ComboUser extends JLabel{

    private User user;

    public ComboUser(User user){
        if (user != null){
            this.user = user;
        } else {
            this.user = new User("");
        }
    }

    @Override
    public String toString() {
        return user.getInitials();
    }
4

2 に答える 2

3

編集コンボボックスでツールチップが必要な場合は、そのコンボボックスのカスタム レンダラーで行う必要があります。以下に短い例を示します。

// some data
User[] users = new User[] { 
        new User("Clara Zetkin", "CZ"),
        new User("Rosa Luxemburg", "RL"),
        new User("Susan Sontag", "SS"),
};
// the renderer for use in the editor
ListCellRenderer comboRenderer = new DefaultListCellRenderer() {

    @Override
    public Component getListCellRendererComponent(JList<?> list,
            Object value, int index, boolean isSelected,
            boolean cellHasFocus) {
        if (value instanceof User) {
            setToolTipText(((User) value).getName());
            value = ((User) value).getInitials();
        } else {
            setToolTipText(null);
        }
        return super.getListCellRendererComponent(list, value, index, isSelected,
                cellHasFocus);
    }

};
JComboBox editingCombo = new JComboBox(users);
editingCombo.setRenderer(comboRenderer);

JTable table = new JTable(3, 2);
// set up the editor for the first column
table.getColumnModel().getColumn(0).setCellEditor(new DefaultCellEditor(editingCombo));
// the renderer to use in the table
TableCellRenderer renderer = new DefaultTableCellRenderer() {

    @Override
    protected void setValue(Object value) {
        if (value instanceof User) {
            setToolTipText(((User) value).getInitials());
            value = ((User) value).getName();
        } else {
            setToolTipText(null);
        }
        super.setValue(value);
    }

};
table.getColumnModel().getColumn(0).setCellRenderer(renderer);
于 2012-11-02T16:46:36.457 に答える
2

たとえば、 JTable チュートリアル、テスト コード例を参照してください。

import java.awt.BorderLayout;
import javax.swing.DefaultCellEditor;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JList;
import javax.swing.plaf.basic.BasicComboBoxRenderer;

public class TableRenderDemo extends JPanel {

    private static final long serialVersionUID = 1L;

    public TableRenderDemo() {
        super(new BorderLayout(5, 5));
        final JTable table = new JTable(new MyTableModel());
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        table.setFillsViewportHeight(true);
        table.setRowHeight(20);
        JScrollPane scrollPane = new JScrollPane(table);
        initColumnSizes(table);
        setUpSportColumn(table, table.getColumnModel().getColumn(2));
        add(scrollPane, BorderLayout.CENTER);
        JButton resetButton = new JButton("Reset to default");
        resetButton.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                for (int i = 0; i < table.getRowCount(); i++) {
                    table.getModel().setValueAt("None of the above", i, 2);
                }
            }
        });
        add(resetButton, BorderLayout.SOUTH);
    }

    private void initColumnSizes(JTable table) {
        MyTableModel model = (MyTableModel) table.getModel();
        TableColumn column = null;
        Component comp = null;
        int headerWidth = 0;
        int cellWidth = 0;
        Object[] longValues = model.longValues;
        TableCellRenderer headerRenderer = table.getTableHeader().getDefaultRenderer();
        for (int i = 0; i < 5; i++) {
            column = table.getColumnModel().getColumn(i);
            comp = headerRenderer.getTableCellRendererComponent(null, column.getHeaderValue(), false, false, 0, 0);
            headerWidth = comp.getPreferredSize().width;
            comp = table.getDefaultRenderer(model.getColumnClass(i)).getTableCellRendererComponent(table, longValues[i], false, false, 0, i);
            cellWidth = comp.getPreferredSize().width;
            column.setPreferredWidth(Math.max(headerWidth, cellWidth));
        }
    }

    private void setUpSportColumn(JTable table, TableColumn sportColumn) {
        ArrayList<String> listSomeString = new ArrayList<String>();
        listSomeString.add("Snowboarding");
        listSomeString.add("Rowing");
        listSomeString.add("Knitting");
        listSomeString.add("Speed reading");
        listSomeString.add("Pool");
        listSomeString.add("None of the above");
        JComboBox comboBox = new JComboBox();
        comboBox.addItem(new Item(1, "-"));
        comboBox.addItem(new Item(2, "Snowboarding"));
        comboBox.addItem(new Item(3, "Rowing"));
        comboBox.addItem(new Item(4, "Knitting"));
        comboBox.addItem(new Item(5, "Speed reading"));
        comboBox.addItem(new Item(6, "Pool"));
        comboBox.addItem(new Item(7, "None of the above"));
        comboBox.setMaximumRowCount(3);
        comboBox.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                JComboBox comboBox = (JComboBox) e.getSource();
                Item item = (Item) comboBox.getSelectedItem();
                System.out.println(item.getId() + " : " + item.getDescription());
            }
        });
        //comboBox.setRenderer(new ItemRenderer());
        sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
        DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
        renderer.setToolTipText("Click for combo box");
        sportColumn.setCellRenderer(renderer);
    }

    class ItemRenderer extends BasicComboBoxRenderer {

        @Override
        public Component getListCellRendererComponent(JList list, Object value,
                int index, boolean isSelected, boolean cellHasFocus) {
            super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
            if (value != null) {
                Item item = (Item) value;
                setText(item.getDescription().toUpperCase());
            }
            if (index == -1) {
                Item item = (Item) value;
                setText("" + item.getId());
            }
            return this;
        }
    }

    class Item {

        private int id;
        private String description;

        public Item(int id, String description) {
            this.id = id;
            this.description = description;
        }

        public int getId() {
            return id;
        }

        public String getDescription() {
            return description;
        }

        @Override
        public String toString() {
            return description;
        }
    }

    class MyTableModel extends AbstractTableModel {

        private static final long serialVersionUID = 1L;
        private String[] columnNames = {"First Name", "Last Name", "Sport", "# of Years", "Vegetarian"};
        private Object[][] data = {{"Kathy", "Smith", "Snowboarding", new Integer(5), false},
            {"John", "Doe", "Rowing", new Integer(3), true}, {"Sue", "Black", "Knitting", new Integer(2), false},
            {"Jane", "White", "Speed reading", new Integer(20), true}, {"Joe", "Brown", "Pool", new Integer(10), false}};
        public final Object[] longValues = {"Jane", "Kathy", "None of the above", new Integer(20), Boolean.TRUE};

        @Override
        public int getColumnCount() {
            return columnNames.length;
        }

        @Override
        public int getRowCount() {
            return data.length;
        }

        @Override
        public String getColumnName(int col) {
            return columnNames[col];
        }

        @Override
        public Object getValueAt(int row, int col) {
            return data[row][col];
        }

        @Override
        public Class<?> getColumnClass(int c) {
            return getValueAt(0, c).getClass();
        }

        @Override
        public boolean isCellEditable(int row, int col) {
            if (col < 2) {
                return false;
            } else {
                return true;
            }
        }

        @Override
        public void setValueAt(Object value, int row, int col) {
            data[row][col] = value;
            fireTableCellUpdated(row, col);
            System.out.println("New value of data: " + getValueAt(row, col));
        }
    }

    private static void createAndShowGUI() {
        JFrame frame = new JFrame("TableRenderDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        TableRenderDemo newContentPane = new TableRenderDemo();
        frame.setContentPane(newContentPane);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                createAndShowGUI();
            }
        });
    }
}
于 2012-11-02T09:24:58.453 に答える