public class TableRenderDemo extends JPanel { private boolean DEBUG = false; public TableRenderDemo() { super(new GridLayout(1,0)); JTable table = new JTable(new MyTableModel()); table.setPreferredScrollableViewportSize(new Dimension(500, 70)); table.setFillsViewportHeight(true); //Create the scroll pane and add the table to it. JScrollPane scrollPane = new JScrollPane(table); //Set up column sizes. initColumnSizes(table); //Fiddle with the Sport column's cell editors/renderers. setUpSportColumn(table, table.getColumnModel().getColumn(2)); //Add the scroll pane to this panel. add(scrollPane); } /* * This method picks good column sizes. * If all column heads are wider than the column's cells' * contents, then you can just use column.sizeWidthToFit(). */ 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; if (DEBUG) { System.out.println("Initializing width of column " + i + ". " + "headerWidth = " + headerWidth + "; cellWidth = " + cellWidth); } column.setPreferredWidth(Math.max(headerWidth, cellWidth)); } } public void setUpSportColumn(JTable table, TableColumn sportColumn) { //Set up the editor for the sport cells. JComboBox comboBox = new JComboBox(); comboBox.addItem("Snowboarding"); comboBox.addItem("Rowing"); comboBox.addItem("Knitting"); comboBox.addItem("Speed reading"); comboBox.addItem("Pool"); comboBox.addItem("None of the above");
//Set up tool tips for the sport cells. // DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
// renderer.setToolTipText("Click for combo box"); sportColumn.setCellRenderer(new MyButtonRender()); sportColumn.setCellEditor(new MyButtonEditor()); } /** * 自定义一个往列里边添加按钮的单元格编辑器。最好继承DefaultCellEditor,不然要实现的方法就太多了。 * */ public class MyButtonEditor extends DefaultCellEditor { /** * serialVersionUID */ private static final long serialVersionUID = -6546334664166791132L; private JPanel panel; private JButton button; public MyButtonEditor() { // DefautlCellEditor有此构造器,需要传入一个,但这个不会使用到,直接new一个即可。 super(new JTextField()); // 设置点击几次激活编辑。 this.setClickCountToStart(1); this.initButton(); this.initPanel(); // 添加按钮。 this.panel.add(this.button); } private void initButton() { this.button = new JButton("编辑"); // 设置按钮的大小及位置。 this.button.setBounds(0, 0, 50, 15); // 为按钮添加事件。这里只能添加ActionListner事件,Mouse事件无效。 this.button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // 触发取消编辑的事件,不会调用tableModel的setValue方法。 MyButtonEditor.this.fireEditingCanceled(); JOptionPane.showMessageDialog(null,"Eggs are not supposed to be green."); // 这里可以做其它操作。 // 可以将table传入,通过getSelectedRow,getSelectColumn方法获取到当前选择的行和列及其它操作等。 } }); } private void initPanel() { this.panel = new JPanel(); // panel使用绝对定位,这样button就不会充满整个单元格。 this.panel.setLayout(null); } /** * 这里重写父类的编辑方法,返回一个JPanel对象即可(也可以直接返回一个Button对象,但是那样会填充满整个单元格) */ @Override public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { // 只为按钮赋值即可。也可以作其它操作。 this.button.setText(value == null ? "" : String.valueOf(value)); return this.panel; } /** * 重写编辑单元格时获取的值。如果不重写,这里可能会为按钮设置错误的值。 */ @Override public Object getCellEditorValue() { return this.button.getText(); } }代码1,上
public class MyButtonRender implements TableCellRenderer { private JPanel panel; private JButton button; public MyButtonRender() { this.initButton(); this.initPanel(); // 添加按钮。 this.panel.add(this.button); } private void initButton() { this.button = new JButton("编辑"); // 设置按钮的大小及位置。 this.button.setBounds(0, 0, 50, 15); // 在渲染器里边添加按钮的事件是不会触发的 // this.button.addActionListener(new ActionListener() // { // // public void actionPerformed(ActionEvent e) // { // // TODO Auto-generated method stub // } // }); } private void initPanel() { this.panel = new JPanel(); // panel使用绝对定位,这样button就不会充满整个单元格。 this.panel.setLayout(null); } public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { // 只为按钮赋值即可。也可以作其它操作,如绘背景等。 this.button.setText(value == null ? "" : String.valueOf(value)); return this.panel; } } class MyTableModel extends AbstractTableModel { private String[] columnNames = {"First Name", "Last Name", "Sport", "# of Years", "Vegetarian"}; private Object[][] data = { {"Kathy", "Smith", "Snowboarding", new Integer(5), new Boolean(false)}, {"John", "Doe", "Rowing", new Integer(3), new Boolean(true)}, {"Sue", "Black", "Knitting", new Integer(2), new Boolean(false)}, {"Jane", "White", "Speed reading", new Integer(20), new Boolean(true)}, {"Joe", "Brown", "Pool", new Integer(10), new Boolean(false)} }; public final Object[] longValues = {"Jane", "Kathy", "None of the above", new Integer(20), Boolean.TRUE}; public int getColumnCount() { return columnNames.length; } public int getRowCount() { return data.length; } public String getColumnName(int col) { return columnNames[col]; } public Object getValueAt(int row, int col) { return data[row][col]; } /* * JTable uses this method to determine the default renderer/ * editor for each cell. If we didn't implement this method, * then the last column would contain text ("true"/"false"), * rather than a check box. */ public Class getColumnClass(int c) { return getValueAt(0, c).getClass(); } /* * Don't need to implement this method unless your table's * editable. */ public boolean isCellEditable(int row, int col) { //Note that the data/cell address is constant, //no matter where the cell appears onscreen. if (col == 10) { return false; } else { return true; } } /* * Don't need to implement this method unless your table's * data can change. */ public void setValueAt(Object value, int row, int col) { if (DEBUG) { System.out.println("Setting value at " + row + "," + col + " to " + value + " (an instance of " + value.getClass() + ")"); } data[row][col] = value; fireTableCellUpdated(row, col); if (DEBUG) { System.out.println("New value of data:"); printDebugData(); } } private void printDebugData() { int numRows = getRowCount(); int numCols = getColumnCount(); for (int i=0; i < numRows; i++) { System.out.print(" row " + i + ":"); for (int j=0; j < numCols; j++) { System.out.print(" " + data[i][j]); } System.out.println(); } System.out.println("--------------------------"); } } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Create and set up the window. JFrame frame = new JFrame("TableRenderDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane. TableRenderDemo newContentPane = new TableRenderDemo(); newContentPane.setOpaque(true); //content panes must be opaque frame.setContentPane(newContentPane); //Display the window. frame.pack(); frame.setVisible(true); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } }代码2上
public class TableRenderDemo extends JPanel {
private boolean DEBUG = false; public TableRenderDemo() {
super(new GridLayout(1,0)); JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true); //Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table); //Set up column sizes.
initColumnSizes(table); //Fiddle with the Sport column's cell editors/renderers.
setUpSportColumn(table, table.getColumnModel().getColumn(2)); //Add the scroll pane to this panel.
add(scrollPane);
} /*
* This method picks good column sizes.
* If all column heads are wider than the column's cells'
* contents, then you can just use column.sizeWidthToFit().
*/
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; if (DEBUG) {
System.out.println("Initializing width of column "
+ i + ". "
+ "headerWidth = " + headerWidth
+ "; cellWidth = " + cellWidth);
} column.setPreferredWidth(Math.max(headerWidth, cellWidth));
}
} public void setUpSportColumn(JTable table,
TableColumn sportColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Knitting");
comboBox.addItem("Speed reading");
comboBox.addItem("Pool");
comboBox.addItem("None of the above");
// sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
// DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
// renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(new MyButtonRender());
sportColumn.setCellEditor(new MyButtonEditor());
}
/**
* 自定义一个往列里边添加按钮的单元格编辑器。最好继承DefaultCellEditor,不然要实现的方法就太多了。
*
*/
public class MyButtonEditor extends DefaultCellEditor
{ /**
* serialVersionUID
*/
private static final long serialVersionUID = -6546334664166791132L; private JPanel panel; private JButton button; public MyButtonEditor()
{
// DefautlCellEditor有此构造器,需要传入一个,但这个不会使用到,直接new一个即可。
super(new JTextField()); // 设置点击几次激活编辑。
this.setClickCountToStart(1); this.initButton(); this.initPanel(); // 添加按钮。
this.panel.add(this.button);
} private void initButton()
{
this.button = new JButton("编辑"); // 设置按钮的大小及位置。
this.button.setBounds(0, 0, 50, 15); // 为按钮添加事件。这里只能添加ActionListner事件,Mouse事件无效。
this.button.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
// 触发取消编辑的事件,不会调用tableModel的setValue方法。
MyButtonEditor.this.fireEditingCanceled();
JOptionPane.showMessageDialog(null,"Eggs are not supposed to be green.");
// 这里可以做其它操作。
// 可以将table传入,通过getSelectedRow,getSelectColumn方法获取到当前选择的行和列及其它操作等。
}
}); } private void initPanel()
{
this.panel = new JPanel(); // panel使用绝对定位,这样button就不会充满整个单元格。
this.panel.setLayout(null);
}
/**
* 这里重写父类的编辑方法,返回一个JPanel对象即可(也可以直接返回一个Button对象,但是那样会填充满整个单元格)
*/
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column)
{
// 只为按钮赋值即可。也可以作其它操作。
this.button.setText(value == null ? "" : String.valueOf(value)); return this.panel;
} /**
* 重写编辑单元格时获取的值。如果不重写,这里可能会为按钮设置错误的值。
*/
@Override
public Object getCellEditorValue()
{
return this.button.getText();
} }代码1,上
public class MyButtonRender implements TableCellRenderer
{
private JPanel panel; private JButton button; public MyButtonRender()
{
this.initButton(); this.initPanel(); // 添加按钮。
this.panel.add(this.button);
} private void initButton()
{
this.button = new JButton("编辑"); // 设置按钮的大小及位置。
this.button.setBounds(0, 0, 50, 15); // 在渲染器里边添加按钮的事件是不会触发的
// this.button.addActionListener(new ActionListener()
// {
//
// public void actionPerformed(ActionEvent e)
// {
// // TODO Auto-generated method stub
// }
// }); } private void initPanel()
{
this.panel = new JPanel(); // panel使用绝对定位,这样button就不会充满整个单元格。
this.panel.setLayout(null);
} public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row,
int column)
{
// 只为按钮赋值即可。也可以作其它操作,如绘背景等。
this.button.setText(value == null ? "" : String.valueOf(value)); return this.panel;
} }
class MyTableModel extends AbstractTableModel {
private String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
private Object[][] data = {
{"Kathy", "Smith",
"Snowboarding", new Integer(5), new Boolean(false)},
{"John", "Doe",
"Rowing", new Integer(3), new Boolean(true)},
{"Sue", "Black",
"Knitting", new Integer(2), new Boolean(false)},
{"Jane", "White",
"Speed reading", new Integer(20), new Boolean(true)},
{"Joe", "Brown",
"Pool", new Integer(10), new Boolean(false)}
}; public final Object[] longValues = {"Jane", "Kathy",
"None of the above",
new Integer(20), Boolean.TRUE}; public int getColumnCount() {
return columnNames.length;
} public int getRowCount() {
return data.length;
} public String getColumnName(int col) {
return columnNames[col];
} public Object getValueAt(int row, int col) {
return data[row][col];
} /*
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
*/
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
} /*
* Don't need to implement this method unless your table's
* editable.
*/
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col == 10) {
return false;
} else {
return true;
}
} /*
* Don't need to implement this method unless your table's
* data can change.
*/
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
} data[row][col] = value;
fireTableCellUpdated(row, col); if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
}
} private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount(); for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
}
System.out.println();
}
System.out.println("--------------------------");
}
} /**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("TableRenderDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane.
TableRenderDemo newContentPane = new TableRenderDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane); //Display the window.
frame.pack();
frame.setVisible(true);
} public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}代码2上