Posted on 2010-08-24 11:52
TWaver 阅读(1077)
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上篇的例子主要的动作在editor上，不过editor只有在点击在cell单元的时候才会显示，所以还不得不造一个界面跟editor一样的renderer进行“造假”，当然由于这个例子只有两个按钮，所以renderer的代码不多，不过如果editor的组件很多，而且经常需要改动那不就麻烦了，所以我们可以考虑一下让renderer复用editor的显示部分，以下的代码就是很好的说明了这种复用
1
import java.awt.*;
2import java.awt.event.*;
3import javax.swing.*;
4import javax.swing.table.*;
5
6
public class TableTest2 extends JFrame 
{
7
JTable table;
8
String[] states = new String[]{"stop", "stop", "stop"};
9
10 // model
11 class TableModel extends AbstractTableModel{
12 public int getColumnCount() {
13 return 2;
14
}
15 public int getRowCount() {
16 return states.length;
17 }
18 public Object getValueAt(int rowIndex, int columnIndex) {
19 if(columnIndex == 0){
20 return states[rowIndex];
21 }
22 return null;
23 }
24 public String getColumnName(int columnIndex) {
25 if(columnIndex == 0){
26 return "state";
27 }else{
28 return "operate";
29 }
30 }
31 public boolean isCellEditable(int rowIndex, int columnIndex) {
32 if(columnIndex == 0){
33 return false;
34 }else{
35 return true;
36 }
37 }
38 }
39
40 // cell editor
41 class Editor extends AbstractCellEditor implements TableCellEditor, ActionListener {
42 int row;
43 JTable table;
44 JPanel panel;
45 JButton start;
46 JButton stop;
47 Editor(){
48 panel = new JPanel();
49 panel.setLayout(new GridLayout(1, 2));
50 start = new JButton("start");
51 stop = new JButton("stop");
52 start.addActionListener(this);
53 stop.addActionListener(this);
54 panel.add(start);
55 panel.add(stop);
56 }
57 public Object getCellEditorValue() {
58 return null;
59 }
60 public Component getTableCellEditorComponent(
61 JTable table, Object value, boolean isSelected, int row, int column) {
62 this.table = table;
63 this.row = row;
64 return panel;
65 }
66
67 public void actionPerformed(ActionEvent e) {
68 if(e.getSource() == start){
69 states[row] = "start";
70 }else{
71 states[row] = "stop";
72 }
73 ((AbstractTableModel)table.getModel()).fireTableCellUpdated(row, 0);
74 }
75
76 }
77
78 // cell render
79 class Renderer extends JComponent implements TableCellRenderer{
80 TableCellEditor editor;
81 Renderer(TableCellEditor editor){
82 this.editor = editor;
83 }
84 public Component getTableCellRendererComponent(JTable table, Object value,
85 boolean isSelected, boolean hasFocus, int row, int column) {
86 return editor.getTableCellEditorComponent(table, value, isSelected, row, column);
87 }
88 }
89
90 public TableTest2(){
91 super("editor used by renderer");
92 table = new JTable(new TableModel());
93 TableColumn tableColumn = table.getColumnModel().getColumn(1);
94 tableColumn.setCellRenderer(new Renderer(new Editor()));
95 tableColumn.setCellEditor(new Editor());
96
97 this.getContentPane().setLayout(new BorderLayout());
98 this.getContentPane().add(new JScrollPane(table), BorderLayout.CENTER);
99 this.setSize(500, 300);
100 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
101 }
102 public static void main(String[] args) {
103 new TableTest2().show();
104 }
105
}
