/* $RCSfile$
* $Author: hansonr $
* $Date: 2010-10-29 17:52:10 +0200 (ven., 29 oct. 2010) $
* $Revision: 14547 $
*
* Copyright (C) 2004-2005 The Jmol Development Team
*
* Contact: jmol-developers@lists.sf.net
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jmol.export;
import java.awt.Component;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetListener;
import java.awt.dnd.DropTargetEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.io.File;
import java.util.List;
import org.jmol.api.JmolViewer;
import org.jmol.util.Escape;
import org.jmol.util.Logger;
/**
* A simple Dropping class to allow files to be dragged onto a target.
* It supports drag-and-drop of files from file browsers, and CML text
* from editors, e.g. jEdit.
*
* <p>Note that multiple drops ARE thread safe.
*
* @author Billy <simon.tyrrell@virgin.net>
*/
public class JmolFileDropper implements DropTargetListener {
private String fd_oldFileName;
private PropertyChangeSupport fd_propSupport;
static public final String FD_PROPERTY_INLINE = "inline";
JmolViewer viewer;
PropertyChangeListener pcl;
public JmolFileDropper(JmolViewer viewer) {
fd_oldFileName = "";
fd_propSupport = new PropertyChangeSupport(this);
this.viewer = viewer;
addPropertyChangeListener(
(pcl = new PropertyChangeListener() {
public void propertyChange(PropertyChangeEvent evt) {
doDrop(evt);
}
}));
Component display = viewer.getDisplay();
display.setDropTarget(
new DropTarget(display, this));
display.setEnabled(true);
}
public void dispose() {
removePropertyChangeListener(pcl);
viewer = null;
}
private void loadFile(String fname) {
fname = fname.replace('\\', '/').trim();
if (fname.indexOf("://") < 0)
fname = (fname.startsWith("/") ? "file://" : "file:///") + fname;
viewer.openFileAsynchronously(fname);
}
private void loadFiles(List fileList) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < fileList.size(); ++ i) {
File f = (File) fileList.get(i);
String fname = f.getAbsolutePath();
fname = fname.replace('\\', '/').trim();
fname = (fname.startsWith("/") ? "file://" : "file:///") + fname;
sb.append("load ").append(i == 0 ? "" : "APPEND ")
.append(Escape.escape(fname)).append(";\n");
}
sb.append("frame *;reset;");
viewer.script(sb.toString());
}
protected void doDrop(PropertyChangeEvent evt) {
// new event, because we open the file directly. Not sure this has been tested
if (evt.getPropertyName() == FD_PROPERTY_INLINE) {
viewer.openStringInline((String) evt.getNewValue());
}
}
public synchronized void addPropertyChangeListener(PropertyChangeListener l) {
fd_propSupport.addPropertyChangeListener(l);
}
public synchronized void removePropertyChangeListener(PropertyChangeListener l) {
fd_propSupport.removePropertyChangeListener(l);
}
public void dragOver(DropTargetDragEvent dtde) {
Logger.debug("DropOver detected...");
}
public void dragEnter(DropTargetDragEvent dtde) {
Logger.debug("DropEnter detected...");
dtde.acceptDrag(DnDConstants.ACTION_COPY_OR_MOVE);
}
public void dragExit(DropTargetEvent dtde) {
Logger.debug("DropExit detected...");
}
public void dropActionChanged(DropTargetDragEvent dtde) { }
public void drop(DropTargetDropEvent dtde) {
Logger.debug("Drop detected...");
Transferable t = dtde.getTransferable();
boolean isAccepted = false;
if (t.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {
while (true) {
Object o = null;
try {
dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
o = t.getTransferData(DataFlavor.javaFileListFlavor);
isAccepted = true;
} catch (Exception e) {
Logger.error("transfer failed");
}
// if o is still null we had an exception
if (o instanceof List) {
List fileList = (List) o;
final int length = fileList.size();
if (length == 1) {
String fileName = ((File) fileList.get(0)).getAbsolutePath().trim();
if (fileName.endsWith(".bmp"))
break; // try another flavor -- Mozilla bug
dtde.getDropTargetContext().dropComplete(true);
loadFile(fileName);
return;
}
dtde.getDropTargetContext().dropComplete(true);
loadFiles(fileList);
return;
}
break;
}
}
Logger.debug("browsing supported flavours to find something useful...");
DataFlavor[] df = t.getTransferDataFlavors();
if (df == null || df.length == 0)
return;
for (int i = 0; i < df.length; ++i) {
DataFlavor flavor = df[i];
Object o = null;
if (true) {
Logger.info("df " + i + " flavor " + flavor);
Logger.info(" class: " + flavor.getRepresentationClass().getName());
Logger.info(" mime : " + flavor.getMimeType());
}
if (flavor.getMimeType().startsWith("text/uri-list")
&& flavor.getRepresentationClass().getName().equals(
"java.lang.String")) {
/*
* This is one of the (many) flavors that KDE provides: df 2 flavour
* java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;
* representationclass=java.lang.String] java.lang.String String: file
* :/home/egonw/data/Projects/SourceForge/Jmol/Jmol-HEAD/samples/
* cml/methanol2.cml
*
* A later KDE version gave me the following. Note the mime!! hence the
* startsWith above
*
* df 3 flavor java.awt.datatransfer.DataFlavor[mimetype=text/uri-list
* ;representationclass=java.lang.String] class: java.lang.String mime :
* text/uri-list; class=java.lang.String; charset=Unicode
*/
try {
o = null;
if (!isAccepted)
dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
isAccepted = true;
o = t.getTransferData(flavor);
} catch (Exception e) {
Logger.error(null, e);
}
if (o instanceof String) {
if (Logger.debugging) {
Logger.debug(" String: " + o.toString());
}
loadFile(o.toString());
dtde.getDropTargetContext().dropComplete(true);
return;
}
} else if (flavor.getMimeType().equals(
"application/x-java-serialized-object; class=java.lang.String")) {
/*
* This is one of the flavors that jEdit provides:
*
* df 0 flavor java.awt.datatransfer.DataFlavor[mimetype=application/
* x-java-serialized-object;representationclass=java.lang.String] class:
* java.lang.String mime : application/x-java-serialized-object;
* class=java.lang.String String: <molecule title="benzene.mol"
* xmlns="http://www.xml-cml.org/schema/cml2/core"
*
* But KDE also provides:
*
* df 24 flavor java.awt.datatransfer.DataFlavor[mimetype=application
* /x-java-serialized-object;representationclass=java.lang.String]
* class: java.lang.String mime : application/x-java-serialized-object;
* class=java.lang.String String: file:/home/egonw/Desktop/1PN8.pdb
*/
try {
o = null;
if (!isAccepted)
dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
isAccepted = true;
o = t.getTransferData(df[i]);
} catch (Exception e) {
Logger.error(null, e);
}
if (o instanceof String) {
String content = (String) o;
if (Logger.debugging) {
Logger.debug(" String: " + content);
}
if (content.startsWith("file:/")) {
loadFile(content);
} else {
PropertyChangeEvent pce = new PropertyChangeEvent(this,
FD_PROPERTY_INLINE, fd_oldFileName, content);
fd_propSupport.firePropertyChange(pce);
}
dtde.getDropTargetContext().dropComplete(true);
return;
}
}
}
if (!isAccepted)
dtde.rejectDrop();
}
}