Mega Code Archive
Demonstration of the top-level TransferHandler support on JFrame
<![CDATA[
/*
* 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 javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
import java.util.*;
/**
* Demonstration of the top-level {@code TransferHandler}
* support on {@code JFrame}.
*
* @author Shannon Hickey
*/
public class TopLevelTransferHandlerDemo extends JFrame {
private static boolean DEMO = false;
private JDesktopPane dp = new JDesktopPane();
private DefaultListModel listModel = new DefaultListModel();
private JList list = new JList(listModel);
private static int left;
private static int top;
private JCheckBoxMenuItem copyItem;
private JCheckBoxMenuItem nullItem;
private JCheckBoxMenuItem thItem;
private class Doc extends InternalFrameAdapter implements ActionListener {
String name;
JInternalFrame frame;
TransferHandler th;
JTextArea area;
public Doc(File file) {
this.name = file.getName();
try {
init(file.toURI().toURL());
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
public Doc(String name) {
this.name = name;
init(getClass().getResource(name));
}
private void init(URL url) {
frame = new JInternalFrame(name);
frame.addInternalFrameListener(this);
listModel.add(listModel.size(), this);
area = new JTextArea();
area.setMargin(new Insets(5, 5, 5, 5));
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));
String in;
while ((in = reader.readLine()) != null) {
area.append(in);
area.append("\n");
}
reader.close();
} catch (Exception e) {
e.printStackTrace();
return;
}
th = area.getTransferHandler();
area.setFont(new Font("monospaced", Font.PLAIN, 12));
area.setCaretPosition(0);
area.setDragEnabled(true);
area.setDropMode(DropMode.INSERT);
frame.getContentPane().add(new JScrollPane(area));
dp.add(frame);
frame.show();
if (DEMO) {
frame.setSize(300, 200);
} else {
frame.setSize(400, 300);
}
frame.setResizable(true);
frame.setClosable(true);
frame.setIconifiable(true);
frame.setMaximizable(true);
frame.setLocation(left, top);
incr();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
select();
}
});
nullItem.addActionListener(this);
setNullTH();
}
public void internalFrameClosing(InternalFrameEvent event) {
listModel.removeElement(this);
nullItem.removeActionListener(this);
}
public void internalFrameOpened(InternalFrameEvent event) {
int index = listModel.indexOf(this);
list.getSelectionModel().setSelectionInterval(index, index);
}
public void internalFrameActivated(InternalFrameEvent event) {
int index = listModel.indexOf(this);
list.getSelectionModel().setSelectionInterval(index, index);
}
public String toString() {
return name;
}
public void select() {
try {
frame.toFront();
frame.setSelected(true);
} catch (java.beans.PropertyVetoException e) {}
}
public void actionPerformed(ActionEvent ae) {
setNullTH();
}
public void setNullTH() {
if (nullItem.isSelected()) {
area.setTransferHandler(null);
} else {
area.setTransferHandler(th);
}
}
}
private TransferHandler handler = new TransferHandler() {
public boolean canImport(TransferHandler.TransferSupport support) {
if (!support.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {
return false;
}
if (copyItem.isSelected()) {
boolean copySupported = (COPY & support.getSourceDropActions()) == COPY;
if (!copySupported) {
return false;
}
support.setDropAction(COPY);
}
return true;
}
public boolean importData(TransferHandler.TransferSupport support) {
if (!canImport(support)) {
return false;
}
Transferable t = support.getTransferable();
try {
java.util.List<File> l =
(java.util.List<File>)t.getTransferData(DataFlavor.javaFileListFlavor);
for (File f : l) {
new Doc(f);
}
} catch (UnsupportedFlavorException e) {
return false;
} catch (IOException e) {
return false;
}
return true;
}
};
private static void incr() {
left += 30;
top += 30;
if (top == 150) {
top = 0;
}
}
public TopLevelTransferHandlerDemo() {
super("TopLevelTransferHandlerDemo");
setJMenuBar(createDummyMenuBar());
getContentPane().add(createDummyToolBar(), BorderLayout.NORTH);
JSplitPane sp = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, list, dp);
sp.setDividerLocation(120);
getContentPane().add(sp);
//new Doc("sample.txt");
list.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
list.addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
if (e.getValueIsAdjusting()) {
return;
}
Doc val = (Doc)list.getSelectedValue();
if (val != null) {
val.select();
}
}
});
final TransferHandler th = list.getTransferHandler();
nullItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
if (nullItem.isSelected()) {
list.setTransferHandler(null);
} else {
list.setTransferHandler(th);
}
}
});
thItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
if (thItem.isSelected()) {
setTransferHandler(handler);
} else {
setTransferHandler(null);
}
}
});
dp.setTransferHandler(handler);
}
private static void createAndShowGUI(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
}
TopLevelTransferHandlerDemo test = new TopLevelTransferHandlerDemo();
test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
if (DEMO) {
test.setSize(493, 307);
} else {
test.setSize(800, 600);
}
test.setLocationRelativeTo(null);
test.setVisible(true);
test.list.requestFocus();
}
public static void main(final String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
//Turn off metal's use of bold fonts
UIManager.put("swing.boldMetal", Boolean.FALSE);
createAndShowGUI(args);
}
});
}
private JToolBar createDummyToolBar() {
JToolBar tb = new JToolBar();
JButton b;
b = new JButton("New");
b.setRequestFocusEnabled(false);
tb.add(b);
b = new JButton("Open");
b.setRequestFocusEnabled(false);
tb.add(b);
b = new JButton("Save");
b.setRequestFocusEnabled(false);
tb.add(b);
b = new JButton("Print");
b.setRequestFocusEnabled(false);
tb.add(b);
b = new JButton("Preview");
b.setRequestFocusEnabled(false);
tb.add(b);
tb.setFloatable(false);
return tb;
}
private JMenuBar createDummyMenuBar() {
JMenuBar mb = new JMenuBar();
mb.add(createDummyMenu("File"));
mb.add(createDummyMenu("Edit"));
mb.add(createDummyMenu("Search"));
mb.add(createDummyMenu("View"));
mb.add(createDummyMenu("Tools"));
mb.add(createDummyMenu("Help"));
JMenu demo = new JMenu("Demo");
demo.setMnemonic(KeyEvent.VK_D);
mb.add(demo);
thItem = new JCheckBoxMenuItem("Use Top-Level TransferHandler");
thItem.setMnemonic(KeyEvent.VK_T);
demo.add(thItem);
nullItem = new JCheckBoxMenuItem("Remove TransferHandler from List and Text");
nullItem.setMnemonic(KeyEvent.VK_R);
demo.add(nullItem);
copyItem = new JCheckBoxMenuItem("Use COPY Action");
copyItem.setMnemonic(KeyEvent.VK_C);
demo.add(copyItem);
return mb;
}
private JMenu createDummyMenu(String str) {
JMenu menu = new JMenu(str);
JMenuItem item = new JMenuItem("[Empty]");
item.setEnabled(false);
menu.add(item);
return menu;
}
}
]]>