package org.autoplot;
import java.awt.Component;
import java.awt.datatransfer.DataFlavor;
import java.awt.dnd.DnDConstants;
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.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import org.das2.graph.DasCanvasComponent;
import org.das2.graph.DasPlot;
import org.das2.util.LoggerManager;
import org.autoplot.bookmarks.Bookmark;
import org.autoplot.dom.Plot;
import org.autoplot.dom.PlotElement;
import org.autoplot.layout.LayoutConstants;
import org.autoplot.datasource.DataSetSelector;
/**
* DropTarget allows URIs to be dropped onto plots of the page.
* @author jbf
*/
public class UriDropTargetListener implements DropTargetListener {
private static final Logger logger= LoggerManager.getLogger("autoplot.gui.droptarget");
DataSetSelector dss;
ApplicationModel model;
List<String> supportedFlavors;
public UriDropTargetListener(DataSetSelector dss, ApplicationModel model) {
this.model = model;
this.dss = dss;
supportedFlavors= new ArrayList<>();
supportedFlavors.add("text/uri-list;class=java.lang.String");
supportedFlavors.add("application/x-java-url;class=java.net.URL");
supportedFlavors.add("application/x-java-file-list;class=java.util.List");
//TODO: make sure this list is consistent with getURI code, and eventually make into loop.
}
/**
* get the URI when a reference is dropped on to Autoplot. This is quite
* platform-specific, how the drop appears, and a number of different
* transfer types are queried to see if a URI can be found.
*
* @param dtde the drop target.
* @return the URI or null.
*/
private String getURI( DropTargetDropEvent dtde ) {
boolean haveAcceptedDrop= false;
Bookmark item = null;
List<Bookmark> items = null;
if ( logger.isLoggable(Level.FINE) ) {
for ( DataFlavor df: dtde.getCurrentDataFlavors() ) {
logger.log(Level.FINE, "drop data flavor: {0} {1}", new Object[]{df.getMimeType(), df.getHumanPresentableName()});
}
}
if (dtde.isDataFlavorSupported(DataFlavor.stringFlavor)) {
try {
dtde.acceptDrop(DnDConstants.ACTION_COPY);
haveAcceptedDrop= true;
logger.fine("looking, try using DataFlavor.stringFlavor to get uri");
String data = ((String) dtde.getTransferable().getTransferData(DataFlavor.stringFlavor)).trim();
logger.log(Level.FINER, "got string data: {0}", data);
if (data.length() > 19 && data.startsWith("<bookmark-list")) {
items = Bookmark.parseBookmarks(data);
} else if (data.length() > 14 && data.startsWith("<bookmark")) {
item = Bookmark.parseBookmark(data);
} else {
item = new Bookmark.Item(data);
}
} catch ( Exception ex) {
logger.log(Level.FINE, "unable to get text/uri-list: {0}", ex.getMessage());
}
}
if ( item==null ) {
try {
DataFlavor df = new DataFlavor("text/uri-list;class=java.lang.String");
logger.fine("looking, try text/uri-list;class=java.lang.String");
if ( dtde.isDataFlavorSupported(df) ) {
if ( !haveAcceptedDrop ) {
dtde.acceptDrop(DnDConstants.ACTION_COPY);
haveAcceptedDrop= true;
}
String data = String.valueOf( dtde.getTransferable().getTransferData(df) );
logger.log(Level.FINER, "got string data: {0}", data);
if ( data!=null ) {
item= new Bookmark.Item( data );
}
} else {
logger.finer("not supported");
}
} catch ( Exception ex) {
logger.log(Level.FINE, "unable to get text/uri-list: {0}", ex.getMessage());
}
}
if ( item==null ) { // how to do the drop on a Mac???
try {
DataFlavor df = new DataFlavor("application/x-java-url;class=java.net.URL");
logger.fine("looking, try application/x-java-url;class=java.net.URL");
if ( dtde.isDataFlavorSupported( df ) ) {
logger.fine("data flavor application/x-java-url;class=java.net.URL supported");
if ( !haveAcceptedDrop ) {
dtde.acceptDrop(DnDConstants.ACTION_COPY);
haveAcceptedDrop= true;
}
String data = String.valueOf( dtde.getTransferable().getTransferData(df) );
logger.log(Level.FINER, "got string data: {0}", data);
if (data.startsWith("file://localhost/")) {
data= data.substring(16); // mac at least does this...
}
item= new Bookmark.Item( data );
} else {
logger.finer("not supported");
}
} catch ( Exception ex ) {
logger.log(Level.FINE, "unable to get application/x-java-url: {0}", ex.getMessage());
}
}
if ( item==null ) {
try {
DataFlavor df = new DataFlavor("application/x-java-file-list;class=java.util.List");
logger.fine("looking, try application/x-java-url;class=java.net.List");
if ( dtde.isDataFlavorSupported( df ) ) {
logger.fine("data flavor application/x-java-url;class=java.net.List supported");
if ( !haveAcceptedDrop ) {
dtde.acceptDrop(DnDConstants.ACTION_COPY);
haveAcceptedDrop= true;
}
List list= (List)dtde.getTransferable().getTransferData(df);
logger.log(Level.FINER, "got list data with number of elements: {0}", list.size() );
if ( list.size()==1 ) {
String data = list.get(0).toString();
if (data.startsWith("file://localhost/")) {
data= data.substring(16); // mac at least does this...
}
item= new Bookmark.Item( data );
}
} else {
logger.finer("not supported");
}
} catch (Exception ex) {
logger.log(Level.FINE, "unable to get application/x-java-file-list: {0}", ex.getMessage());
}
}
String uri=null;
if ( item != null ) {
if ( item instanceof Bookmark.Item ) {
uri= ((Bookmark.Item)item).getUri();
} else {
model.showMessage( "only one URI can be dropped", "only one URI", JOptionPane.WARNING_MESSAGE);
}
} else if ( items!=null ) {
model.showMessage( "only one URI can be dropped", "only one URI", JOptionPane.WARNING_MESSAGE);
} else {
model.showMessage("couldn't find URI in drop target", "no URI", JOptionPane.WARNING_MESSAGE);
}
return uri;
}
@Override
public void dragEnter(DropTargetDragEvent dtde) {
Object s= dtde.getSource();
DasCanvasComponent cc=null;
if ( s instanceof DropTarget ) {
Component c= ((DropTarget)s).getComponent();
if ( c instanceof DasCanvasComponent ) cc= (DasCanvasComponent)c;
}
if ( cc instanceof DasPlot ) {
if (dtde.isDataFlavorSupported(DataFlavor.stringFlavor)) {
dtde.acceptDrag(DnDConstants.ACTION_COPY);
} else {
for ( String ss: supportedFlavors ) {
try {
DataFlavor df= new DataFlavor(ss);
dtde.isDataFlavorSupported(df);
} catch (ClassNotFoundException ex) {
logger.log(Level.FINE, null, ex);
}
}
}
}
}
@Override
public void dragOver(DropTargetDragEvent dtde) {
}
@Override
public void dropActionChanged(DropTargetDragEvent dtde) {
}
@Override
public void dragExit(DropTargetEvent dte) {
}
@Override
public void drop(DropTargetDropEvent dtde) {
String uri= getURI( dtde );
if (uri != null) {
DasCanvasComponent cc=null;
Object s= dtde.getSource();
if ( s instanceof DropTarget ) {
Component c= ((DropTarget)s).getComponent();
if ( c instanceof DasCanvasComponent ) cc= (DasCanvasComponent)c;
}
Plot plot;
if ( cc instanceof DasPlot ) {
plot= model.dom.getController().getPlotFor(cc);
if ( plot==null ) plot= null;
} else {
plot= null;
}
if ( plot==null ) {
DasCanvasComponent dcc= model.getCanvas().getCanvasComponentAt( dtde.getLocation().x, dtde.getLocation().y-50 );
if ( dcc!=null ) {
plot= model.dom.getController().getPlotFor(dcc);
plot= model.dom.getController().addPlot( plot, LayoutConstants.BELOW );
} else {
dcc= model.getCanvas().getCanvasComponentAt( dtde.getLocation().x, dtde.getLocation().y+50 );
if ( dcc!=null ) {
plot= model.dom.getController().getPlotFor(dcc);
plot= model.dom.getController().addPlot( plot, LayoutConstants.ABOVE );
}
}
if ( plot==null ) {
model.showMessage("URIs may only be dropped on plots, just above, or just below", "not plot target", JOptionPane.WARNING_MESSAGE);
} else {
PlotElement pe= model.dom.getController().addPlotElement( plot, null );
model.dom.getController().setPlotElement(pe);
dss.setValue(uri);
dss.maybePlot(true);
}
} else {
final List<PlotElement> pe = model.dom.getController().getPlotElementsFor(plot);
if (pe.isEmpty()) {
model.showMessage("no plot elements here", "no plot elements", JOptionPane.WARNING_MESSAGE);
return;
}
model.dom.getController().setPlotElement(pe.get(0)); // set the focus
dss.setValue(uri);
dss.maybePlot(true);
}
}
}
}