[英]Paint jtable cell editor above jtable
設計一個自定義的JTable我已經知道DefaultCellEditor在他的構造函數中允許一個JComboBox。 單擊此JComboBox以顯示列表項時,該JComboBox顯示在JTable的其他單元格上方。 問題是我需要像JComboBox所提供的那樣更復雜的行為,以便在單擊JButton(或用戶在JTextField中輸入文本)時,我實現了帶有JList和JButton的JTextField。變得可見。 這3個元素位於JPanel中。 當我嘗試將此面板用作單元格編輯器(擴展AbtractCellEditor並實現TableCellEditor)時,列表中的元素顯示在編輯單元格內,但是我無法通過組合模仿DefaultCellEditor的行為,因此列表元素顯示在JTable上方。
在這里,我定義了自定義單元格編輯器:(非常簡短的版本);
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.AbstractCellEditor;
import javax.swing.JButton;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.TableCellEditor;
public class CustomCellEditor extends AbstractCellEditor implements TableCellEditor {
private JList list;
private JButton button;
private JTextField editor;
private JPanel mainPanel;
public CustomCellEditor() {
list = new JList(new String[] { "One", "Two", "Three" });
editor = new JTextField();
button = new JButton("Click me ");
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
list.setVisible(!list.isVisible());
}
});
JPanel auxPanel = new JPanel(new BorderLayout());
auxPanel.add(editor, BorderLayout.CENTER);
auxPanel.add(button, BorderLayout.EAST);
mainPanel = new JPanel(new BorderLayout());
mainPanel.add(auxPanel, BorderLayout.NORTH);
mainPanel.add(list, BorderLayout.CENTER);
}
@Override
public Object getCellEditorValue() {
return editor.getText();
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
return mainPanel;
}
}
這是一個帶有jtable的主程序,該面板帶有作為單元格編輯器的面板:
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
public class CustomTable {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
CustomTable instance = new CustomTable();
instance.createAndShowUI();
}
});
}
private void createAndShowUI() {
JTable table = new JTable(new CustomTableModel());
//So that I can see the contents of the list when edited
table.setRowHeight(60);
TableColumn editableColumn = table.getColumnModel().getColumn(0);
editableColumn.setPreferredWidth(250);
editableColumn.setCellEditor(new CustomCellEditor());
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(table, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
private class CustomTableModel extends AbstractTableModel {
private final String[] columnNames = {"Editable column", "Other column"};
private final Object[][] data = {
{"Ricardo", "Mr."},
{"Josefina", "Ms."}
};
@Override
public int getRowCount() {
return data.length;
}
@Override
public int getColumnCount() {
return columnNames.length;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
return data[rowIndex][columnIndex];
}
@Override
public boolean isCellEditable(int row, int col) {
if (0 == col)
return true;
return false;
}
@Override
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row, col);
}
}
}
有人能幫我嗎?
謝謝!!
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