Java examples for Swing:JTable
Add Editor for integer inside tables
/*/*from ww w. j av a 2 s . co m*/ * TableFTFEditDemo.java requires one other file: * IntegerEditor.java */ import javax.swing.JFrame; import javax.swing.JDialog; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.AbstractTableModel; import java.awt.Dimension; import java.awt.GridLayout; import javax.swing.AbstractAction; import javax.swing.DefaultCellEditor; import javax.swing.JFormattedTextField; import javax.swing.JOptionPane; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.KeyStroke; import javax.swing.SwingUtilities; import java.awt.event.ActionEvent; import java.awt.event.KeyEvent; import java.awt.Component; import java.awt.Toolkit; import java.text.NumberFormat; import java.text.ParseException; import javax.swing.text.DefaultFormatterFactory; import javax.swing.text.NumberFormatter; /** * Implements a cell editor that uses a formatted text field * to edit Integer values. */ class IntegerEditor extends DefaultCellEditor { JFormattedTextField ftf; NumberFormat integerFormat; private Integer minimum, maximum; private boolean DEBUG = false; public IntegerEditor(int min, int max) { super(new JFormattedTextField()); ftf = (JFormattedTextField) getComponent(); minimum = new Integer(min); maximum = new Integer(max); //Set up the editor for the integer cells. integerFormat = NumberFormat.getIntegerInstance(); NumberFormatter intFormatter = new NumberFormatter(integerFormat); intFormatter.setFormat(integerFormat); intFormatter.setMinimum(minimum); intFormatter.setMaximum(maximum); ftf.setFormatterFactory(new DefaultFormatterFactory(intFormatter)); ftf.setValue(minimum); ftf.setHorizontalAlignment(JTextField.TRAILING); ftf.setFocusLostBehavior(JFormattedTextField.PERSIST); //React when the user presses Enter while the editor is //active. (Tab is handled as specified by //JFormattedTextField's focusLostBehavior property.) ftf.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0), "check"); ftf.getActionMap().put("check", new AbstractAction() { public void actionPerformed(ActionEvent e) { if (!ftf.isEditValid()) { //The text is invalid. if (userSaysRevert()) { //reverted ftf.postActionEvent(); //inform the editor } } else try { //The text is valid, ftf.commitEdit(); //so use it. ftf.postActionEvent(); //stop editing } catch (java.text.ParseException exc) { } } }); } //Override to invoke setValue on the formatted text field. public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { JFormattedTextField ftf = (JFormattedTextField) super .getTableCellEditorComponent(table, value, isSelected, row, column); ftf.setValue(value); return ftf; } //Override to ensure that the value remains an Integer. public Object getCellEditorValue() { JFormattedTextField ftf = (JFormattedTextField) getComponent(); Object o = ftf.getValue(); if (o instanceof Integer) { return o; } else if (o instanceof Number) { return new Integer(((Number) o).intValue()); } else { if (DEBUG) { System.out.println("getCellEditorValue: o isn't a Number"); } try { return integerFormat.parseObject(o.toString()); } catch (ParseException exc) { System.err.println("getCellEditorValue: can't parse o: " + o); return null; } } } //Override to check whether the edit is valid, //setting the value if it is and complaining if //it isn't. If it's OK for the editor to go //away, we need to invoke the superclass's version //of this method so that everything gets cleaned up. public boolean stopCellEditing() { JFormattedTextField ftf = (JFormattedTextField) getComponent(); if (ftf.isEditValid()) { try { ftf.commitEdit(); } catch (java.text.ParseException exc) { } } else { //text is invalid if (!userSaysRevert()) { //user wants to edit return false; //don't let the editor go away } } return super.stopCellEditing(); } /** * Lets the user know that the text they entered is * bad. Returns true if the user elects to revert to * the last good value. Otherwise, returns false, * indicating that the user wants to continue editing. */ protected boolean userSaysRevert() { Toolkit.getDefaultToolkit().beep(); ftf.selectAll(); Object[] options = { "Edit", "Revert" }; int answer = JOptionPane.showOptionDialog( SwingUtilities.getWindowAncestor(ftf), "The value must be an integer between " + minimum + " and " + maximum + ".\n" + "You can either continue editing " + "or revert to the last valid value.", "Invalid Text Entered", JOptionPane.YES_NO_OPTION, JOptionPane.ERROR_MESSAGE, null, options, options[1]); if (answer == 1) { //Revert! ftf.setValue(ftf.getValue()); return true; } return false; } } /** * This is exactly like TableDemo, except that it uses a * custom cell editor to validate integer input. */ public class TableFTFEditDemo extends JPanel { private boolean DEBUG = false; public TableFTFEditDemo() { 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 stricter input validation for the integer column. table.setDefaultEditor(Integer.class, new IntegerEditor(0, 100)); //If we didn't want this editor to be used for other //Integer columns, we'd do this: //table.getColumnModel().getColumn(3).setCellEditor( // new IntegerEditor(0, 100)); //Add the scroll pane to this panel. add(scrollPane); } 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 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 < 2) { 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() { //Create and set up the window. JFrame frame = new JFrame("TableFTFEditDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane. TableFTFEditDemo newContentPane = new TableFTFEditDemo(); 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(); } }); } } /* * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions 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 Oracle or the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */