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/**
* @version 1.10 1999-09-16
* @author Cay Horstmann
*/
import java.awt.Container;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
public class ImageTransferTest {
public static void main(String[] args) {
JFrame frame1 = new ImageTransferFrame();
JFrame frame2 = new ImageTransferFrame();
frame1.setTitle("Frame 1");
frame2.setTitle("Frame 2");
frame1.show();
frame2.show();
}
}
class ImageTransferFrame extends JFrame implements ActionListener {
public ImageTransferFrame() {
setSize(300, 300);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
Container contentPane = getContentPane();
label = new JLabel();
contentPane.add(label, "Center");
JMenu fileMenu = new JMenu("File");
openItem = new JMenuItem("Open");
openItem.addActionListener(this);
fileMenu.add(openItem);
exitItem = new JMenuItem("Exit");
exitItem.addActionListener(this);
fileMenu.add(exitItem);
JMenu editMenu = new JMenu("Edit");
copyItem = new JMenuItem("Copy");
copyItem.addActionListener(this);
editMenu.add(copyItem);
pasteItem = new JMenuItem("Paste");
pasteItem.addActionListener(this);
editMenu.add(pasteItem);
JMenuBar menuBar = new JMenuBar();
menuBar.add(fileMenu);
menuBar.add(editMenu);
setJMenuBar(menuBar);
}
public void actionPerformed(ActionEvent evt) {
Object source = evt.getSource();
if (source == openItem) {
JFileChooser chooser = new JFileChooser();
chooser.setCurrentDirectory(new File("."));
chooser.setFileFilter(new javax.swing.filechooser.FileFilter() {
public boolean accept(File f) {
String name = f.getName().toLowerCase();
return name.endsWith(".gif") || name.endsWith(".jpg")
|| name.endsWith(".jpeg") || f.isDirectory();
}
public String getDescription() {
return "Image files";
}
});
int r = chooser.showOpenDialog(this);
if (r == JFileChooser.APPROVE_OPTION) {
String name = chooser.getSelectedFile().getAbsolutePath();
setImage(Toolkit.getDefaultToolkit().getImage(name));
}
} else if (source == exitItem)
System.exit(0);
else if (source == copyItem)
copy();
else if (source == pasteItem)
paste();
}
private void copy() {
ImageSelection selection = new ImageSelection(theImage);
localClipboard.setContents(selection, null);
}
private void paste() {
Transferable contents = localClipboard.getContents(this);
if (contents == null)
return;
try {
Image image = (Image) contents
.getTransferData(ImageSelection.imageFlavor);
setImage(image);
} catch (Exception e) {
}
}
public void setImage(Image image) {
theImage = image;
label.setIcon(new ImageIcon(image));
}
private static Clipboard localClipboard = new Clipboard("local");
private Image theImage;
private JLabel label;
private JMenuItem openItem;
private JMenuItem exitItem;
private JMenuItem copyItem;
private JMenuItem pasteItem;
}
class ImageSelection implements Transferable {
public ImageSelection(Image image) {
theImage = image;
}
public DataFlavor[] getTransferDataFlavors() {
return flavors;
}
public boolean isDataFlavorSupported(DataFlavor flavor) {
return flavor.equals(imageFlavor);
}
public synchronized Object getTransferData(DataFlavor flavor)
throws UnsupportedFlavorException {
if (flavor.equals(imageFlavor)) {
return theImage;
} else {
throw new UnsupportedFlavorException(flavor);
}
}
public static final DataFlavor imageFlavor = new DataFlavor(
java.awt.Image.class, "AWT Image");
private static DataFlavor[] flavors = { imageFlavor };
private Image theImage;
}
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