Java tutorial
/* * 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. */ package components; /* * TableSelectionDemo.java requires no other files. */ import javax.swing.*; import javax.swing.table.AbstractTableModel; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.GridLayout; import java.awt.Dimension; public class TableSelectionDemo extends JPanel implements ActionListener { private JTable table; private JCheckBox rowCheck; private JCheckBox columnCheck; private JCheckBox cellCheck; private ButtonGroup buttonGroup; private JTextArea output; public TableSelectionDemo() { super(); setLayout(new BoxLayout(this, BoxLayout.Y_AXIS)); table = new JTable(new MyTableModel()); table.setPreferredScrollableViewportSize(new Dimension(500, 70)); table.setFillsViewportHeight(true); table.getSelectionModel().addListSelectionListener(new RowListener()); table.getColumnModel().getSelectionModel().addListSelectionListener(new ColumnListener()); add(new JScrollPane(table)); add(new JLabel("Selection Mode")); buttonGroup = new ButtonGroup(); addRadio("Multiple Interval Selection").setSelected(true); addRadio("Single Selection"); addRadio("Single Interval Selection"); add(new JLabel("Selection Options")); rowCheck = addCheckBox("Row Selection"); rowCheck.setSelected(true); columnCheck = addCheckBox("Column Selection"); cellCheck = addCheckBox("Cell Selection"); cellCheck.setEnabled(false); output = new JTextArea(5, 40); output.setEditable(false); add(new JScrollPane(output)); } private JCheckBox addCheckBox(String text) { JCheckBox checkBox = new JCheckBox(text); checkBox.addActionListener(this); add(checkBox); return checkBox; } private JRadioButton addRadio(String text) { JRadioButton b = new JRadioButton(text); b.addActionListener(this); buttonGroup.add(b); add(b); return b; } public void actionPerformed(ActionEvent event) { String command = event.getActionCommand(); //Cell selection is disabled in Multiple Interval Selection //mode. The enabled state of cellCheck is a convenient flag //for this status. if ("Row Selection" == command) { table.setRowSelectionAllowed(rowCheck.isSelected()); //In MIS mode, column selection allowed must be the //opposite of row selection allowed. if (!cellCheck.isEnabled()) { table.setColumnSelectionAllowed(!rowCheck.isSelected()); } } else if ("Column Selection" == command) { table.setColumnSelectionAllowed(columnCheck.isSelected()); //In MIS mode, row selection allowed must be the //opposite of column selection allowed. if (!cellCheck.isEnabled()) { table.setRowSelectionAllowed(!columnCheck.isSelected()); } } else if ("Cell Selection" == command) { table.setCellSelectionEnabled(cellCheck.isSelected()); } else if ("Multiple Interval Selection" == command) { table.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION); //If cell selection is on, turn it off. if (cellCheck.isSelected()) { cellCheck.setSelected(false); table.setCellSelectionEnabled(false); } //And don't let it be turned back on. cellCheck.setEnabled(false); } else if ("Single Interval Selection" == command) { table.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION); //Cell selection is ok in this mode. cellCheck.setEnabled(true); } else if ("Single Selection" == command) { table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); //Cell selection is ok in this mode. cellCheck.setEnabled(true); } //Update checkboxes to reflect selection mode side effects. rowCheck.setSelected(table.getRowSelectionAllowed()); columnCheck.setSelected(table.getColumnSelectionAllowed()); if (cellCheck.isEnabled()) { cellCheck.setSelected(table.getCellSelectionEnabled()); } } private void outputSelection() { output.append(String.format("Lead: %d, %d. ", table.getSelectionModel().getLeadSelectionIndex(), table.getColumnModel().getSelectionModel().getLeadSelectionIndex())); output.append("Rows:"); for (int c : table.getSelectedRows()) { output.append(String.format(" %d", c)); } output.append(". Columns:"); for (int c : table.getSelectedColumns()) { output.append(String.format(" %d", c)); } output.append(".\n"); } private class RowListener implements ListSelectionListener { public void valueChanged(ListSelectionEvent event) { if (event.getValueIsAdjusting()) { return; } output.append("ROW SELECTION EVENT. "); outputSelection(); } } private class ColumnListener implements ListSelectionListener { public void valueChanged(ListSelectionEvent event) { if (event.getValueIsAdjusting()) { return; } output.append("COLUMN SELECTION EVENT. "); outputSelection(); } } 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(); } /* * 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 < 2) { 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) { data[row][col] = value; fireTableCellUpdated(row, col); } } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Disable boldface controls. UIManager.put("swing.boldMetal", Boolean.FALSE); //Create and set up the window. JFrame frame = new JFrame("TableSelectionDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane. TableSelectionDemo newContentPane = new TableSelectionDemo(); 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(); } }); } }