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탭으로 나뉘어져 있는 글입니다. [1][2] |
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등록일:2008-03-17 10:32:12  (0%)
작성자:
제목:Java by API > java.awt.datatransfer > Transferable |
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Transferable: getTransferData(DataFlavor flavor)
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragSource;
import java.awt.dnd.DragSourceContext;
import java.awt.dnd.DragSourceDragEvent;
import java.awt.dnd.DragSourceDropEvent;
import java.awt.dnd.DragSourceEvent;
import java.awt.dnd.DragSourceListener;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.dnd.DropTargetListener;
import java.awt.dnd.InvalidDnDOperationException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class MainClass extends JFrame implements ActionListener, DropTargetListener {
DragLabel source = new DragLabel("Drag and drop me to the following JButton", JLabel.CENTER);
JButton target = new JButton();
MainClass(String title) {
super(title);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
source.setForeground(Color.red);
getContentPane().add(source, BorderLayout.NORTH);
target.addActionListener(this);
getContentPane().add(target, BorderLayout.SOUTH);
new DropTarget(target, DnDConstants.ACTION_COPY_OR_MOVE, this);
setSize(205, 100);
setVisible(true);
}
public void actionPerformed(ActionEvent e) {
JButton b = (JButton) e.getSource();
b.setText("");
source.setText("Drag and drop me to the following JButton");
}
public void dragEnter(DropTargetDragEvent e) {
System.out.println("Entering drop target #1");
}
public void dragExit(DropTargetEvent e) {
System.out.println("Exiting drop target #1");
}
public void dragOver(DropTargetDragEvent e) {
System.out.println("Dragging over drop target #1");
}
public void drop(DropTargetDropEvent e) {
System.out.println("Dropping");
try {
Transferable t = e.getTransferable();
if (e.isDataFlavorSupported(DataFlavor.stringFlavor)) {
e.acceptDrop(e.getDropAction());
String s;
s = (String) t.getTransferData(DataFlavor.stringFlavor);
target.setText(s);
e.dropComplete(true);
} else
e.rejectDrop();
} catch (java.io.IOException e2) {
} catch (UnsupportedFlavorException e2) {
}
}
public void dropActionChanged(DropTargetDragEvent e) {
System.out.println("Drop action changed #1");
}
public static void main(String[] args) {
new MainClass("Drag and Drop Demo");
}
}
class DragLabel extends JLabel implements DragGestureListener, DragSourceListener {
private DragSource ds = DragSource.getDefaultDragSource();
public DragLabel(String s, int alignment) {
super(s, alignment);
int action = DnDConstants.ACTION_COPY_OR_MOVE;
ds.createDefaultDragGestureRecognizer(this, action, this);
}
public void dragGestureRecognized(DragGestureEvent e) {
try {
Transferable t = new StringSelection(getText());
e.startDrag(DragSource.DefaultCopyNoDrop, t, this);
} catch (InvalidDnDOperationException e2) {
System.out.println(e2);
}
}
public void dragDropEnd(DragSourceDropEvent e) {
System.out.println("Drag and drop end");
if (e.getDropSuccess() == false) {
System.out.println("unsuccessful");
return;
}
int action = e.getDropAction();
if ((action & DnDConstants.ACTION_MOVE) != 0)
setText("");
}
public void dragEnter(DragSourceDragEvent e) {
System.out.println("Entering drop target #2");
DragSourceContext ctx = e.getDragSourceContext();
int action = e.getDropAction();
if ((action & DnDConstants.ACTION_COPY) != 0)
ctx.setCursor(DragSource.DefaultCopyDrop);
else
ctx.setCursor(DragSource.DefaultCopyNoDrop);
}
public void dragExit(DragSourceEvent e) {
System.out.println("Exiting drop target #2");
}
public void dragOver(DragSourceDragEvent e) {
System.out.println("Dragging over drop target #2");
}
public void dropActionChanged(DragSourceDragEvent e) {
System.out.println("Drop action changed #2");
}
}
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implements Transferable
import java.awt.BorderLayout;
import java.awt.Image;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.IOException;
import javax.swing.AbstractButton;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.TransferHandler;
public class MainClass {
public static void main(String args[]) {
JFrame frame = new JFrame("Drag Image");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Icon icon = new ImageIcon("image.jpg");
JLabel label = new JLabel(icon);
label.setTransferHandler(new ImageSelection());
MouseListener listener = new MouseAdapter() {
public void mousePressed(MouseEvent me) {
JComponent comp = (JComponent) me.getSource();
TransferHandler handler = comp.getTransferHandler();
handler.exportAsDrag(comp, me, TransferHandler.COPY);
}
};
label.addMouseListener(listener);
frame.add(new JScrollPane(label), BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}
class ImageSelection extends TransferHandler implements Transferable {
private static final DataFlavor flavors[] = { DataFlavor.imageFlavor };
private Image image;
public int getSourceActions(JComponent c) {
return TransferHandler.COPY;
}
public boolean canImport(JComponent comp, DataFlavor flavor[]) {
if (!(comp instanceof JLabel) && !(comp instanceof AbstractButton)) {
return false;
}
for (int i = 0, n = flavor.length; i < n; i++) {
for (int j = 0, m = flavors.length; j < m; j++) {
if (flavor[i].equals(flavors[j])) {
return true;
}
}
}
return false;
}
public Transferable createTransferable(JComponent comp) {
image = null;
if (comp instanceof JLabel) {
JLabel label = (JLabel) comp;
Icon icon = label.getIcon();
if (icon instanceof ImageIcon) {
image = ((ImageIcon) icon).getImage();
return this;
}
} else if (comp instanceof AbstractButton) {
AbstractButton button = (AbstractButton) comp;
Icon icon = button.getIcon();
if (icon instanceof ImageIcon) {
image = ((ImageIcon) icon).getImage();
return this;
}
}
return null;
}
public boolean importData(JComponent comp, Transferable t) {
if (comp instanceof JLabel) {
JLabel label = (JLabel) comp;
if (t.isDataFlavorSupported(flavors[0])) {
try {
image = (Image) t.getTransferData(flavors[0]);
ImageIcon icon = new ImageIcon(image);
label.setIcon(icon);
return true;
} catch (UnsupportedFlavorException ignored) {
} catch (IOException ignored) {
}
}
} else if (comp instanceof AbstractButton) {
AbstractButton button = (AbstractButton) comp;
if (t.isDataFlavorSupported(flavors[0])) {
try {
image = (Image) t.getTransferData(flavors[0]);
ImageIcon icon = new ImageIcon(image);
button.setIcon(icon);
return true;
} catch (UnsupportedFlavorException ignored) {
} catch (IOException ignored) {
}
}
}
return false;
}
public Object getTransferData(DataFlavor flavor) {
if (isDataFlavorSupported(flavor)) {
return image;
}
return null;
}
public DataFlavor[] getTransferDataFlavors() {
return flavors;
}
public boolean isDataFlavorSupported(DataFlavor flavor) {
return flavors[0].equals(flavor);
}
} |
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[본문링크] Java by API > java.awt.datatransfer > Transferable
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탭으로 나뉘어져 있는 글입니다. [1][2]
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코멘트(이글의 트랙백 주소:/cafe/tb_receive.php?no=2825 |
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