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import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Cursor;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.SystemColor;
import java.awt.datatransfer.Transferable;
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.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPopupMenu;
import javax.swing.JTree;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeWillExpandListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.ExpandVetoException;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;
public class DeviceExplorer extends JTree implements DragSourceListener,DragGestureListener,TreeWillExpandListener {
boolean newDrag=false;
private Rectangle2D _raGhost = new Rectangle2D.Float();
BufferedImage imgGhost;
Point ptOffset = new Point();
public DeviceExplorer() {
DragSource dragSource = DragSource.getDefaultDragSource();
dragSource.createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY_OR_MOVE,this);
}
public void dragGestureRecognized(DragGestureEvent e){
Point ptDragOrigin = e.getDragOrigin();
TreePath path = getPathForLocation(ptDragOrigin.x, ptDragOrigin.y);
newDrag=true;
if (path == null)
return;
if (isRootPath(path))
return; //On ne peut pas drag le root
Rectangle raPath = getPathBounds(path);
ptOffset.setLocation(ptDragOrigin.x-raPath.x, ptDragOrigin.y-raPath.y);
//On recupére l'image du dossier ou du fichier qu'on drag
JLabel lbl = (JLabel) getCellRenderer().getTreeCellRendererComponent(
this,
path.getLastPathComponent(),
false,
isExpanded(path),
getModel().isLeaf(path.getLastPathComponent()),
0,
false
);
lbl.setSize((int)raPath.getWidth(), (int)raPath.getHeight());
imgGhost = new BufferedImage((int)raPath.getWidth(), (int)raPath.getHeight(), BufferedImage.TYPE_INT_ARGB_PRE);
Graphics2D g2 = imgGhost.createGraphics();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 0.5f));
lbl.paint(g2);
Icon icon = lbl.getIcon();
int nStartOfText = (icon == null) ? 0 : icon.getIconWidth()+lbl.getIconTextGap();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.DST_OVER, 0.5f));
g2.setPaint(new GradientPaint(nStartOfText, 0, SystemColor.controlShadow, getWidth(), 0, new Color(255,255,255,0)));
g2.fillRect(nStartOfText, 0, getWidth(), imgGhost.getHeight());
g2.dispose();
setSelectionPath(path);
System.out.println("DRAGGING: "+path.getLastPathComponent());
Transferable transferable = new CTransferableTreePath(path);
e.startDrag(null, imgGhost, new Point(5,5), transferable, this);
}
public void dragEnter(DragSourceDragEvent e){}
public void dragOver(DragSourceDragEvent e){
Point pt = e.getLocation();
if(!pt.equals(lastpt){ // Si la souris a bougé on redessiné l'image du drag
lastpt=pt;
Graphics2D g2 = (Graphics2D) getGraphics();
if (!DragSource.isDragImageSupported()){
paintImmediately(_raGhost.getBounds());
_raGhost.setRect( (pt.x), (pt.y),imgGhost.getWidth(), imgGhost.getHeight());
g2.drawImage(imgGhost, AffineTransform.getTranslateInstance(_raGhost.getX(), _raGhost.getY()), null);
}
}
}
public void dragExit(DragSourceEvent e){}
public void dropActionChanged(DragSourceDragEvent e){}
public void dragDropEnd(DragSourceDropEvent e){} |
