Java tutorial
/* * Copyright (c) 1995 - 2008 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: * * - 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 Sun Microsystems nor 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. */ import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.Rectangle; import java.awt.datatransfer.DataFlavor; import java.awt.datatransfer.UnsupportedFlavorException; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.io.IOException; import javax.swing.BorderFactory; import javax.swing.Box; import javax.swing.BoxLayout; import javax.swing.DefaultListModel; import javax.swing.DropMode; import javax.swing.JCheckBoxMenuItem; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.ListSelectionModel; import javax.swing.SwingUtilities; import javax.swing.TransferHandler; import javax.swing.UIManager; import javax.swing.table.DefaultTableModel; public class FillViewportHeightDemo extends JFrame implements ActionListener { private DefaultListModel model = new DefaultListModel(); private int count = 0; private JTable table; private JCheckBoxMenuItem fillBox; private DefaultTableModel tableModel; private static String getNextString(int count) { StringBuffer buf = new StringBuffer(); for (int i = 0; i < 5; i++) { buf.append(String.valueOf(count)); buf.append(","); } // remove last newline buf.deleteCharAt(buf.length() - 1); return buf.toString(); } private static DefaultTableModel getDefaultTableModel() { String[] cols = { "Foo", "Toto", "Kala", "Pippo", "Boing" }; return new DefaultTableModel(null, cols); } public FillViewportHeightDemo() { super("Empty Table DnD Demo"); tableModel = getDefaultTableModel(); table = new JTable(tableModel); table.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION); table.setDropMode(DropMode.INSERT_ROWS); table.setTransferHandler(new TransferHandler() { public boolean canImport(TransferSupport support) { // for the demo, we'll only support drops (not clipboard paste) if (!support.isDrop()) { return false; } // we only import Strings if (!support.isDataFlavorSupported(DataFlavor.stringFlavor)) { return false; } return true; } public boolean importData(TransferSupport support) { // if we can't handle the import, say so if (!canImport(support)) { return false; } // fetch the drop location JTable.DropLocation dl = (JTable.DropLocation) support.getDropLocation(); int row = dl.getRow(); // fetch the data and bail if this fails String data; try { data = (String) support.getTransferable().getTransferData(DataFlavor.stringFlavor); } catch (UnsupportedFlavorException e) { return false; } catch (IOException e) { return false; } String[] rowData = data.split(","); tableModel.insertRow(row, rowData); Rectangle rect = table.getCellRect(row, 0, false); if (rect != null) { table.scrollRectToVisible(rect); } // demo stuff - remove for blog model.removeAllElements(); model.insertElementAt(getNextString(count++), 0); // end demo stuff return true; } }); JList dragFrom = new JList(model); dragFrom.setFocusable(false); dragFrom.setPrototypeCellValue(getNextString(100)); model.insertElementAt(getNextString(count++), 0); dragFrom.setDragEnabled(true); dragFrom.setBorder(BorderFactory.createLoweredBevelBorder()); dragFrom.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent me) { if (SwingUtilities.isLeftMouseButton(me) && me.getClickCount() % 2 == 0) { String text = (String) model.getElementAt(0); String[] rowData = text.split(","); tableModel.insertRow(table.getRowCount(), rowData); model.removeAllElements(); model.insertElementAt(getNextString(count++), 0); } } }); JPanel p = new JPanel(); p.setLayout(new BoxLayout(p, BoxLayout.X_AXIS)); JPanel wrap = new JPanel(); wrap.add(new JLabel("Drag from here:")); wrap.add(dragFrom); p.add(Box.createHorizontalStrut(4)); p.add(Box.createGlue()); p.add(wrap); p.add(Box.createGlue()); p.add(Box.createHorizontalStrut(4)); getContentPane().add(p, BorderLayout.NORTH); JScrollPane sp = new JScrollPane(table); getContentPane().add(sp, BorderLayout.CENTER); fillBox = new JCheckBoxMenuItem("Fill Viewport Height"); fillBox.addActionListener(this); JMenuBar mb = new JMenuBar(); JMenu options = new JMenu("Options"); mb.add(options); setJMenuBar(mb); JMenuItem clear = new JMenuItem("Reset"); clear.addActionListener(this); options.add(clear); options.add(fillBox); getContentPane().setPreferredSize(new Dimension(260, 180)); } public void actionPerformed(ActionEvent ae) { if (ae.getSource() == fillBox) { table.setFillsViewportHeight(fillBox.isSelected()); } else { tableModel.setRowCount(0); count = 0; model.removeAllElements(); model.insertElementAt(getNextString(count++), 0); } } private static void createAndShowGUI() { // Create and set up the window. FillViewportHeightDemo test = new FillViewportHeightDemo(); test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Display the window. test.pack(); test.setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { // Turn off metal's use of bold fonts UIManager.put("swing.boldMetal", Boolean.FALSE); createAndShowGUI(); } }); } }