單個JTable單元中的多個對象

Question

一個JTable單元中是否可以有多個對象，如下JLabels ，第一行的每個單元中都有兩個JLabels ？

在此示例中，我遇到的問題是我無法將任何偵聽器添加到任何JLabels （ Icons ）。 我的猜測是，除了CellRenderer ，我還需要更改其他內容嗎？

public class JTableIcons extends JPanel {

    private DefaultTableModel model;
    private JTable table;

    public JTableIcons() {
        initModel();
        initTable();
        this.setLayout(new BorderLayout());
        this.add(table, BorderLayout.CENTER);
    }

    class MyRenderer implements TableCellRenderer {

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value,
                boolean isSelected, boolean hasFocus, int row, int column) {

            JPanel panel = new JPanel();
            if (row == 0) {
                JLabel lblCol = new JLabel("Column:" + column);
                Icon icon = UIManager.getIcon("OptionPane.errorIcon");
                JLabel lblIcon = new JLabel();
                lblIcon.setIcon(icon);
                panel.add(lblIcon);
                panel.add(lblCol);
            } else {
                JLabel lbl = new JLabel("(" + row + "," + column + ")");
                panel.add(lbl);
            }
            panel.setOpaque(false);
            return panel;
        }
    }

    private void initTable() {
        table = new JTable(model);
        table.setDefaultRenderer(Object.class, new MyRenderer());
        table.setShowGrid(true);
        table.setGridColor(Color.gray);
        table.setRowHeight(80);
    }

    private void initModel() {
        String[] cols = { "", "", "" };
        Object[][] rows = { { "", "", "" }, { "", "", "" }, { "", "", "" }, { "", "", "" } };
        model = new DefaultTableModel(rows, cols);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame f = new JFrame();
                f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                f.add(new JTableIcons());
                f.setVisible(true);
                f.setSize(new Dimension(500, 350));
                f.setLocationRelativeTo(null);
            }
        });
    }
}

Answer 1

我想添加兩個或多個對象，

當一個組件可以使用時，不要使用兩個組件。 本示例中的渲染器實現了Icon接口，以利用文本和圖標的靈活相對位置。 必要時，將多個組件添加到合適的輕量級Container ，例如JPanel 。

然后對添加的對象也具有不同的偵聽器。

為了實現交互性，請使用自定義 TableCellEditor 。 本示例管理面板中的單選按鈕。

Answer 2

感謝MadProgrammer提供的示例。 設法提出了這一點：

兩個圖標都已連接偵聽器的位置。

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.File;
import java.io.IOException;
import java.util.Vector;

import javax.imageio.ImageIO;
import javax.swing.AbstractCellEditor;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;

public class IconsInTableCell extends JPanel {

    private static final String[] COLUMN_NAMES = { "Icons" };
    private MyTableModel tableModel;
    private JTable table;
    private JFrame frame = new JFrame();

    public IconsInTableCell() {
        super(new BorderLayout(0, 5));
        setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
        tableModel = new MyTableModel();
        table = new JTable(tableModel);
        table.setDefaultEditor(Icon.class, new IconEditor());
        table.setDefaultRenderer(Icon.class, new IconRenderer());
        table.setRowHeight(60);
        add(new JScrollPane(table), BorderLayout.CENTER);
        tableModel.add(new TableEntry());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(new JScrollPane(table), BorderLayout.CENTER);
        frame.pack();
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                frame.setVisible(true);
            }
        });
    }

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

            @Override
            public void run() {
                new IconsInTableCell();
            }
        });
    }

    private enum Icon {
        Delete, Sort;
    }

    private class IconPanel extends JPanel implements MouseListener {

        private JLabel icon1;
        private JLabel icon2;

        IconPanel() {
            super(new GridLayout(0, 1));
            setOpaque(true);

            try {
                icon1 = new JLabel(new ImageIcon(ImageIO.read(new File("Photo01.jpg"))));
                icon2 = new JLabel(new ImageIcon(ImageIO.read(new File("tst.jpg"))));

                icon1 = new JLabel(UIManager.getIcon("OptionPane.errorIcon"));
                icon2 = new JLabel(UIManager.getIcon("OptionPane.warningIcon"));
            } catch (IOException e) {
                e.printStackTrace();
            }

            icon1.addMouseListener(this);
            icon2.addMouseListener(this);

            this.setLayout(new GridBagLayout());
            GridBagConstraints c = new GridBagConstraints();
            add(icon1, c);
            add(new JLabel("TEXT"), c);
            add(icon2, c);
        }

        @Override
        public void mouseClicked(MouseEvent e) {
            if (e.getSource() == icon1)
                System.out.println("icon1");
            else if (e.getSource() == icon2)
                System.out.println("icon2");
        }

        @Override
        public void mousePressed(MouseEvent e) {
        }

        @Override
        public void mouseReleased(MouseEvent e) {
        }

        @Override
        public void mouseEntered(MouseEvent e) {
        }

        @Override
        public void mouseExited(MouseEvent e) {
        }
    }

    private class TableEntry {

        private Icon theIcons;

        TableEntry() {
        }

        TableEntry(Icon aIcons) {
            theIcons = aIcons;
        }

        public Icon getIcons() {
            return theIcons;
        }

        public void setIcons(Icon aIcon) {
            theIcons = aIcon;
        }
    }

    private class MyTableModel extends AbstractTableModel {

        private Vector<Object> theEntries;

        MyTableModel() {
            theEntries = new Vector<Object>();
        }

        @SuppressWarnings("unchecked")
        public void add(TableEntry anEntry) {
            int index = theEntries.size();
            theEntries.add(anEntry);
            fireTableRowsInserted(index, index);
        }

        public void remove(int aRowIndex) {
            if (aRowIndex < 0 || aRowIndex >= theEntries.size()) {
                return;
            }
            theEntries.removeElementAt(aRowIndex);
            fireTableRowsDeleted(aRowIndex, aRowIndex);
        }

        public int getRowCount() {
            return theEntries.size();
        }

        @Override
        public Class<?> getColumnClass(int columnIndex) {
            return Icon.class;
        }

        @Override
        public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
            TableEntry entry = (TableEntry) theEntries.elementAt(rowIndex);
            entry.setIcons((Icon) aValue);
            fireTableCellUpdated(rowIndex, columnIndex);
        }

        @Override
        public boolean isCellEditable(int rowIndex, int columnIndex) {
            return true;
        }

        @Override
        public int getColumnCount() {
            return 1;
        }

        @Override
        public Object getValueAt(int rowIndex, int columnIndex) {
            TableEntry entry = (TableEntry) theEntries.elementAt(rowIndex);
            switch (columnIndex) {
            case 0:
                return entry.getIcons();
            }
            return null;
        }
    }

    private class IconEditor extends AbstractCellEditor implements TableCellEditor {

        private IconPanel theIconPanel;

        IconEditor() {
            theIconPanel = new IconPanel();
        }

        @Override
        public Object getCellEditorValue() {
            return null;
        }

        @Override
        public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
            if (isSelected) {
                theIconPanel.setBackground(table.getSelectionBackground());
            } else {
                theIconPanel.setBackground(table.getBackground());
            }
            return theIconPanel;
        }
    }

    private class IconRenderer extends IconPanel implements TableCellRenderer {

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            if (isSelected) {
                setBackground(table.getSelectionBackground());
            } else {
                setBackground(table.getBackground());
            }
            return this;
        }
    }
}