package net.swing;
import java.awt.AlphaComposite;
import java.awt.Component;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Toolkit;
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.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.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JTree;
import javax.swing.Timer;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeExpansionListener;
import javax.swing.filechooser.FileSystemView;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;
class DragTree extends JTree implements DragGestureListener,
DragSourceListener, DropTargetListener {
BufferedImage ghostImage;
private Rectangle2D ghostRect = new Rectangle2D.Float();
private Point ptOffset = new Point();
private Point lastPoint = new Point();
private TreePath lastPath;
private Timer hoverTimer;
FileNode sourceNode;
public DragTree() {
DragSource dragSource = DragSource.getDefaultDragSource();
dragSource.createDefaultDragGestureRecognizer(this, // component where
// drag originates
DnDConstants.ACTION_COPY_OR_MOVE, // actions
this); // drag gesture recognizer
setModel(createTreeModel());
addTreeExpansionListener(new TreeExpansionListener() {
public void treeCollapsed(TreeExpansionEvent e) {
}
public void treeExpanded(TreeExpansionEvent e) {
TreePath path = e.getPath();
if (path != null) {
FileNode node = (FileNode) path.getLastPathComponent();
if (!node.isExplored()) {
DefaultTreeModel model = (DefaultTreeModel) getModel();
node.explore();
model.nodeStructureChanged(node);
}
}
}
});
this.setCellRenderer(new DefaultTreeCellRenderer() {
public Component getTreeCellRendererComponent(JTree tree,
Object value, boolean selected, boolean expanded,
boolean leaf, int row, boolean hasFocus) {
TreePath tp = tree.getPathForRow(row);
if (tp != null) {
FileNode node = (FileNode) tp.getLastPathComponent();
File f = node.getFile();
try {
Icon icon = FileSystemView.getFileSystemView()
.getSystemIcon(f);
this.setIcon(icon);
this.setLeafIcon(icon);
this.setOpenIcon(icon);
this.setClosedIcon(icon);
this.setDisabledIcon(icon);
} catch (Exception e) {
e.printStackTrace();
}
}
return super.getTreeCellRendererComponent(tree, value,
selected, expanded, leaf, row, hasFocus);
}
});
super.setScrollsOnExpand(true);
new DropTarget(this, DnDConstants.ACTION_COPY_OR_MOVE, this);
// Set up a hover timer, so that a node will be automatically expanded
// or collapsed
// if the user lingers on it for more than a short time
hoverTimer = new Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (lastPath == null) {
return;
}
if (getRowForPath(lastPath) == 0)
return; // Do nothing if we are hovering over the root node
if (isExpanded(lastPath))
collapsePath(lastPath);
else
expandPath(lastPath);
}
});
hoverTimer.setRepeats(false); // Set timer to one-shot mode
this.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
int code = e.getKeyCode();
int modifiers = e.getModifiers();
if (code == 'v' || code == 'V') {
System.out.println("find v");
System.out.println("modifiers:" + modifiers + "\t"
+ ((modifiers & KeyEvent.CTRL_MASK) != 0));
}
if ((modifiers & KeyEvent.CTRL_MASK) != 0
&& (code == 'v' || code == 'V')) {
Transferable tr = Toolkit.getDefaultToolkit()
.getSystemClipboard().getContents(null);
TreePath path = getSelectionPath();
if (path == null) {
return;
}
FileNode node = (FileNode) path.getLastPathComponent();
if (node.isDirectory()) {
System.out.println("file cp");
try {
List list = (List) (tr
.getTransferData(DataFlavor.javaFileListFlavor));
Iterator iterator = list.iterator();
File parent = node.getFile();
while (iterator.hasNext()) {
File f = (File) iterator.next();
cp(f, new File(parent, f.getName()));
}
node.reexplore();
} catch (Exception ioe) {
ioe.printStackTrace();
}
updateUI();
}
}
}
});
}
public void dragGestureRecognized(DragGestureEvent e) {
// drag anything ...
TreePath path = getLeadSelectionPath();
if (path == null)
return;
FileNode node = (FileNode) path.getLastPathComponent();
sourceNode = node;
// Work out the offset of the drag point from the TreePath bounding
// rectangle origin
Rectangle raPath = getPathBounds(path);
Point ptDragOrigin = e.getDragOrigin();
ptOffset.setLocation(ptDragOrigin.x - raPath.x, ptDragOrigin.y
- raPath.y);
// Get the cell renderer (which is a JLabel) for the path being dragged
int row = this.getRowForLocation(ptDragOrigin.x, ptDragOrigin.y);
JLabel lbl = (JLabel) getCellRenderer().getTreeCellRendererComponent(
this, // tree
path.getLastPathComponent(), // value
false, // isSelected (dont want a colored background)
isExpanded(path), // isExpanded
getModel().isLeaf(path.getLastPathComponent()), // isLeaf
row, // row (not important for rendering)
false // hasFocus (dont want a focus rectangle)
);
lbl.setSize((int) raPath.getWidth(), (int) raPath.getHeight()); // <--
// The
// layout
// manager
// would
// normally
// do
// this
// Get a buffered image of the selection for dragging a ghost image
this.ghostImage = new BufferedImage((int) raPath.getWidth(),
(int) raPath.getHeight(), BufferedImage.TYPE_INT_ARGB_PRE);
Graphics2D g2 = ghostImage.createGraphics();
// Ask the cell renderer to paint itself into the BufferedImage
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 0.5f));
// Make the image ghostlike
lbl.paint(g2);
g2.dispose();
//this.getGraphics().drawImage(ghostImage, e.getDragOrigin().x,
// e.getDragOrigin().y, this);
e.startDrag(null, // cursor
ghostImage, new Point(5, 5),
new StringSelection(getFilename()), // transferable
this); // drag source listener
}
public void dragDropEnd(DragSourceDropEvent e) {
ghostImage = null;
sourceNode = null;
}
public void dragEnter(DragSourceDragEvent e) {
}
public void dragExit(DragSourceEvent e) {
if (!DragSource.isDragImageSupported()) {
repaint(ghostRect.getBounds());
}
}
public void dragOver(DragSourceDragEvent e) {
}
public void dropActionChanged(DragSourceDragEvent e) {
}
public String getFilename() {
TreePath path = getLeadSelectionPath();
FileNode node = (FileNode) path.getLastPathComponent();
return ((File) node.getUserObject()).getAbsolutePath();
}
private DefaultTreeModel createTreeModel() {
File root = FileSystemView.getFileSystemView().getRoots()[0];
FileNode rootNode = new FileNode(root);
rootNode.explore();
return n
基于java的鼠标拖拽功能.zip （12个子文件） 
mouseEvent 
.classpath 232B src net swing DragTree.java 12KB Test.java 4KB bin net swing Test.class 5KB DragTree$1.class 1KB DragTree$4.class 3KB Test$1.class 598B DragTree$2.class 2KB DragTree$3.class 1006B DragTree.class 11KB FileNode.class 2KB .project 386B资源评论
