?? s19.htm
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TableCellRenderer renderer = <br> table.getCellRenderer(r,c);</p> <p> Component comp = <br> renderer.getTableCellRendererComponent(<br> table, table.getValueAt(r,c), <br> false, false, r, c);</p> <p> width = comp.getPreferredSize().width;<br> maxw = width > maxw ? width : maxw;<br> }<br> return maxw;<br> }<br> public static void main(String args[]) {<br> GJApp.launch(<br> new Test(),"Setting Column Widths",300,300,320,140);<br> }<br> }<br> class GJApp extends WindowAdapter {<br> static private JPanel statusArea = new JPanel();<br> static private JLabel status = new JLabel(" ");<br> static private ResourceBundle resources;</p> <p> public static void launch(final JFrame f, String title,<br> final int x, final int y, <br> final int w, int h) {<br> launch(f,title,x,y,w,h,null); <br> }<br> public static void launch(final JFrame f, String title,<br> final int x, final int y, <br> final int w, int h,<br> String propertiesFilename) {<br> f.setTitle(title);<br> f.setBounds(x,y,w,h);<br> f.setVisible(true);</p> <p> statusArea.setBorder(BorderFactory.createEtchedBorder());<br> statusArea.setLayout(new FlowLayout(FlowLayout.LEFT,0,0));<br> statusArea.add(status);<br> status.setHorizontalAlignment(JLabel.LEFT);</p> <p> f.setDefaultCloseOperation(<br> WindowConstants.DISPOSE_ON_CLOSE);</p> <p> if(propertiesFilename != null) {<br> resources = ResourceBundle.getBundle(<br> propertiesFilename, Locale.getDefault());<br> }</p> <p> f.addWindowListener(new WindowAdapter() {<br> public void windowClosed(WindowEvent e) {<br> System.exit(0);<br> }<br> });<br> }<br> static public JPanel getStatusArea() {<br> return statusArea;<br> }<br> static public void showStatus(String s) {<br> status.setText(s);<br> }<br> static Object getResource(String key) {<br> if(resources != null) {<br> return resources.getString(key);<br> }<br> return null;<br> }<br> }</p> <hr size="1" noshade> <p align="center"> </p> <p> 19.4 表格列模型</p> <p> </p> <p> 19.4.1 DefaultTableColumnModel類</p> <p> </p> <p align="center"> </p> <p align="center"> </p> <p> 19.4.2 列邊距</p> <p> </p> <p align="center"><b>例19-7 設置列邊距</b></p> <hr noshade size="1"> import java.awt.*;<br> import java.awt.event.*;<br> import javax.swing.*;<br> import javax.swing.event.*;<br> import javax.swing.table.*;<br> import java.util.*; <p>public class Test extends JFrame {<br> JTable table = new JTable(<br> new AbstractTableModel() {<br> public int getRowCount() { return 10; }<br> public int getColumnCount() { return 10; }</p> <p> public Object getValueAt(int row, int col) {<br> return "(" + Integer.toString(row) + "," +<br> Integer.toString(col) + ")";<br> }<br> });</p> <p> public Test() {<br> Container cp = getContentPane();<br> cp.add(new JScrollPane(table), BorderLayout.CENTER);<br> cp.add(new ControlPanel(), BorderLayout.NORTH);<br> }<br> class ControlPanel extends JPanel {<br> private JSlider slider = new JSlider(<br> JSlider.HORIZONTAL,0,100,<br> table.getColumnModel().getColumnMargin());</p> <p> private JLabel label = new JLabel();</p> <p> public ControlPanel() {<br> add(new JLabel("Column Margin:"));<br> add(slider);<br> add(label);</p> <p> label.setText(<br> Integer.toString(<br> table.getColumnModel().getColumnMargin()));</p> <p> slider.addChangeListener(new ChangeListener() {<br> public void stateChanged(ChangeEvent e) {<br> table.getColumnModel().setColumnMargin(<br> slider.getValue());<br> }<br> });<br> table.getColumnModel().addColumnModelListener(<br> new TableColumnModelListener() {<br> public void columnMarginChanged(ChangeEvent e) {<br> TableColumnModel m = table.getColumnModel();<br> label.setText(<br> Integer.toString(m.getColumnMargin()));<br> }</p> <p> // unfortunately, Swing does not have many<br> // event adapter classes ...<br> public void columnAdded(TableColumnModelEvent e) {<br> }<br> public void columnMoved(TableColumnModelEvent e) {<br> }<br> public void columnRemoved(<br> TableColumnModelEvent e) {<br> }<br> public void columnSelectionChanged(<br> ListSelectionEvent e) {<br> }<br> });<br> }<br> }<br> public static void main(String args[]) {<br> GJApp.launch(new Test(),<br> "Column Margins",150,150,500,200); <br> }<br> }<br> class GJApp extends WindowAdapter {<br> static private JPanel statusArea = new JPanel();<br> static private JLabel status = new JLabel(" ");<br> static private ResourceBundle resources;</p> <p> public static void launch(final JFrame f, String title,<br> final int x, final int y, <br> final int w, int h) {<br> launch(f,title,x,y,w,h,null); <br> }<br> public static void launch(final JFrame f, String title,<br> final int x, final int y, <br> final int w, int h,<br> String propertiesFilename) {<br> f.setTitle(title);<br> f.setBounds(x,y,w,h);<br> f.setVisible(true);</p> <p> statusArea.setBorder(BorderFactory.createEtchedBorder());<br> statusArea.setLayout(new FlowLayout(FlowLayout.LEFT,0,0));<br> statusArea.add(status);<br> status.setHorizontalAlignment(JLabel.LEFT);</p> <p> f.setDefaultCloseOperation(<br> WindowConstants.DISPOSE_ON_CLOSE);</p> <p> if(propertiesFilename != null) {<br> resources = ResourceBundle.getBundle(<br> propertiesFilename, Locale.getDefault());<br> }</p> <p> f.addWindowListener(new WindowAdapter() {<br> public void windowClosed(WindowEvent e) {<br> System.exit(0);<br> }<br> });<br> }<br> static public JPanel getStatusArea() {<br> return statusArea;<br> }<br> static public void showStatus(String s) {<br> status.setText(s);<br> }<br> static Object getResource(String key) {<br> if(resources != null) {<br> return resources.getString(key);<br> }<br> return null;<br> }<br> }</p> <hr size="1" noshade> <p align="center"> </p> <p> 19.4.3 隱藏列</p> <p> </p> <p align="center"><b>例19-8 添加和刪除列</b></p> <hr noshade size="1"> import javax.swing.*;<br> import javax.swing.table.*;<br> import java.awt.*;<br> import java.awt.event.*;<br> import java.util.*; <p>public class Test extends JFrame {<br> JTable table = new JTable(<br> new Object[][] {<br> {"Mouse", "Mighty", "M." },<br> {"Mouse", "Polly", "A." },<br> {"Doright", "Dudley", "L." }<br> },<br> new Object[] {<br> "Last Name", "First Name", "Middle Initial" <br> }<br> );<br> public Test() {<br> Container cp = getContentPane();</p> <p> cp.add(new JScrollPane(table), BorderLayout.CENTER);<br> cp.add(new ControlPanel(), BorderLayout.NORTH);<br> }<br> class ControlPanel extends JPanel {<br> private JCheckBox checkBox = new JCheckBox(<br> "First Name Column Showing");<br> public ControlPanel() {<br> final TableColumnModel tcm = table.getColumnModel();<br> final TableColumn firstNameColumn = <br> table.getColumn("First Name");</p> <p> checkBox.setSelected(true);<br> add(checkBox);</p> <p> checkBox.addActionListener(new ActionListener() {<br> public void actionPerformed(ActionEvent event) {<br> if(checkBox.isSelected()) {<br> tcm.addColumn(firstNameColumn);<br> tcm.moveColumn(2,1);<br> }<br> else {<br> tcm.removeColumn(firstNameColumn);<br> }<br> table.sizeColumnsToFit(-1);<br> }<br> });<br> }<br> }<br> public static void main(String args[]) {<br> GJApp.launch(<br> new Test(), "Showing/Hiding Columns",300,300,450,175);<br> }<br> }<br> class GJApp extends WindowAdapter {<br> static private JPanel statusArea = new JPanel();<br> static private JLabel status = new JLabel(" ");<br> static private ResourceBundle resources;</p> <p> public static void launch(final JFrame f, String title,<br> final int x, final int y, <br> final int w, int h) {<br> launch(f,title,x,y,w,h,null); <br> }<br> public static void launch(final JFrame f, String title,<br> final int x, final int y, <br> final int w, int h,<br> String propertiesFilename) {<br> f.setTitle(title);<br> f.setBounds(x,y,w,h);<br> f.setVisible(true);</p> <p> statusArea.setBorder(BorderFactory.createEtchedBorder());<br> statusArea.setLayout(new FlowLayout(FlowLayout.LEFT,0,0));<br> statusArea.add(status);<br> status.setHorizontalAlignment(JLabel.LEFT);</p> <p> f.setDefaultCloseOperation(<br> WindowConstants.DISPOSE_ON_CLOSE);</p> <p> if(propertiesFilename != null) {<br> resources = ResourceBundle.getBundle(<br> propertiesFilename, Locale.getDefault());<br> }</p> <p> f.addWindowListener(new WindowAdapter() {<br> public void windowClosed(WindowEvent e) {<br> System.exit(0);<br> }<br> });<br> }<br> static public JPanel getStatusArea() {<br> return statusArea;<br> }<br> static public void showStatus(String s) {<br> status.setText(s);<br> }<br> static Object getResource(String key) {<br> if(resources != null) {<br>?? 快捷鍵說明
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