Java tutorial
/* From http://java.sun.com/docs/books/tutorial/index.html */ /* * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * -Redistribution of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * -Redistribution in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of Sun Microsystems, Inc. or the names of contributors may * be used to endorse or promote products derived from this software without * specific prior written permission. * * This software is provided "AS IS," without a warranty of any kind. ALL * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. * * You acknowledge that this software is not designed, licensed or intended * for use in the design, construction, operation or maintenance of any * nuclear facility. */ /* * TableDialogEditDemo.java is a 1.4 application that requires these files: * ColorRenderer.java * ColorEditor.java */ import java.awt.Color; import java.awt.Component; import java.awt.Dimension; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.AbstractCellEditor; import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JColorChooser; import javax.swing.JComponent; import javax.swing.JDialog; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.border.Border; import javax.swing.table.AbstractTableModel; import javax.swing.table.TableCellEditor; import javax.swing.table.TableCellRenderer; /** * This is like TableDemo, except that it substitutes a * Favorite Color column for the Last Name column and specifies * a custom cell renderer and editor for the color data. */ public class TableDialogEditDemo extends JPanel { private boolean DEBUG = false; public TableDialogEditDemo() { super(new GridLayout(1, 0)); JTable table = new JTable(new MyTableModel()); table.setPreferredScrollableViewportSize(new Dimension(500, 70)); //Create the scroll pane and add the table to it. JScrollPane scrollPane = new JScrollPane(table); //Set up renderer and editor for the Favorite Color column. table.setDefaultRenderer(Color.class, new ColorRenderer(true)); table.setDefaultEditor(Color.class, new ColorEditor()); //Add the scroll pane to this panel. add(scrollPane); } class MyTableModel extends AbstractTableModel { private String[] columnNames = { "First Name", "Favorite Color", "Sport", "# of Years", "Vegetarian" }; private Object[][] data = { { "Mary", new Color(153, 0, 153), "Snowboarding", new Integer(5), new Boolean(false) }, { "Alison", new Color(51, 51, 153), "Rowing", new Integer(3), new Boolean(true) }, { "Kathy", new Color(51, 102, 51), "Knitting", new Integer(2), new Boolean(false) }, { "Sharon", Color.red, "Speed reading", new Integer(20), new Boolean(true) }, { "Philip", Color.pink, "Pool", new Integer(10), new Boolean(false) } }; 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(); } public boolean isCellEditable(int row, int col) { //Note that the data/cell address is constant, //no matter where the cell appears onscreen. if (col < 1) { return false; } else { return true; } } 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() { //Make sure we have nice window decorations. JFrame.setDefaultLookAndFeelDecorated(true); //Create and set up the window. JFrame frame = new JFrame("TableDialogEditDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane. JComponent newContentPane = new TableDialogEditDemo(); 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(); } }); } } /* * ColorRenderer.java (compiles with releases 1.2, 1.3, and 1.4) is used by * TableDialogEditDemo.java. */ class ColorRenderer extends JLabel implements TableCellRenderer { Border unselectedBorder = null; Border selectedBorder = null; boolean isBordered = true; public ColorRenderer(boolean isBordered) { this.isBordered = isBordered; setOpaque(true); //MUST do this for background to show up. } public Component getTableCellRendererComponent(JTable table, Object color, boolean isSelected, boolean hasFocus, int row, int column) { Color newColor = (Color) color; setBackground(newColor); if (isBordered) { if (isSelected) { if (selectedBorder == null) { selectedBorder = BorderFactory.createMatteBorder(2, 5, 2, 5, table.getSelectionBackground()); } setBorder(selectedBorder); } else { if (unselectedBorder == null) { unselectedBorder = BorderFactory.createMatteBorder(2, 5, 2, 5, table.getBackground()); } setBorder(unselectedBorder); } } setToolTipText("RGB value: " + newColor.getRed() + ", " + newColor.getGreen() + ", " + newColor.getBlue()); return this; } } /* * ColorEditor.java (compiles with releases 1.3 and 1.4) is used by * TableDialogEditDemo.java. */ class ColorEditor extends AbstractCellEditor implements TableCellEditor, ActionListener { Color currentColor; JButton button; JColorChooser colorChooser; JDialog dialog; protected static final String EDIT = "edit"; public ColorEditor() { //Set up the editor (from the table's point of view), //which is a button. //This button brings up the color chooser dialog, //which is the editor from the user's point of view. button = new JButton(); button.setActionCommand(EDIT); button.addActionListener(this); button.setBorderPainted(false); //Set up the dialog that the button brings up. colorChooser = new JColorChooser(); dialog = JColorChooser.createDialog(button, "Pick a Color", true, //modal colorChooser, this, //OK button handler null); //no CANCEL button handler } /** * Handles events from the editor button and from * the dialog's OK button. */ public void actionPerformed(ActionEvent e) { if (EDIT.equals(e.getActionCommand())) { //The user has clicked the cell, so //bring up the dialog. button.setBackground(currentColor); colorChooser.setColor(currentColor); dialog.setVisible(true); //Make the renderer reappear. fireEditingStopped(); } else { //User pressed dialog's "OK" button. currentColor = colorChooser.getColor(); } } //Implement the one CellEditor method that AbstractCellEditor doesn't. public Object getCellEditorValue() { return currentColor; } //Implement the one method defined by TableCellEditor. public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { currentColor = (Color) value; return button; } }