source: trunk/src/org/expeditee/gio/javafx/JavaFXDragAndDropManager.java@ 1097

package org.expeditee.gio.javafx;

import java.io.File;
import java.io.IOException;
import java.util.List;

import org.expeditee.core.Point;
import org.expeditee.gio.DragAndDropManager;
import org.expeditee.gui.MessageBay;

import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.input.DataFormat;
import javafx.scene.input.DragEvent;
import javafx.scene.input.Dragboard;
import javafx.scene.input.TransferMode;

public class JavaFXDragAndDropManager extends DragAndDropManager {
        
        /** Singleton instance. */
        private static JavaFXDragAndDropManager _instance;
        
        /** Singleton instantiator. */
        public static JavaFXDragAndDropManager getInstance()
        {
                if (_instance == null) _instance = new JavaFXDragAndDropManager();
                
                return _instance;
        }

        // GNOME and KDE desktops have a specialized way of DNDing files
        private DataFormat _URIListDataflavorString = new DataFormat("text/uri-list;class=java.lang.String");
        private DataFormat _URIListDataflavorCharArray = new DataFormat("text/uri-list;class=\"[C\"");
        
        private JavaFXDragAndDropManager()
        {
                Scene scene = JavaFXGraphicsManager.ExpediteeApplication.theScene;
                
                scene.setOnDragOver(new EventHandler<DragEvent>() {
                        @Override
                        public void handle(DragEvent event)
                        {
                                Dragboard dragboard = event.getDragboard();
                                if (    dragboard.hasString() ||
                                                dragboard.hasFiles() ||
                                                dragboard.hasContent(_URIListDataflavorString) ||
                                                dragboard.hasContent(_URIListDataflavorCharArray))
                                        
                                {
                                        event.acceptTransferModes(TransferMode.COPY);
                                }
                                event.consume();
                        }
                });
                
                scene.setOnDragDropped(new EventHandler<DragEvent>() {
                        @Override
                        public void handle(DragEvent event)
                        {
                                Dragboard dragboard = event.getDragboard();
                                Point dropPoint = new Point((int) event.getX(), (int) event.getY());
                                boolean success = false;
                                try {
                                        
                                        if (dragboard.hasFiles()) {
                                                List<File> files = dragboard.getFiles();
                                                if (files != null && files.size() > 0) {
                                                        importFileList(files, dropPoint);
                                                }
                                        } else if (dragboard.hasContent(_URIListDataflavorString)) {
                                                String data = (String) dragboard.getContent(_URIListDataflavorString);
                                                List<File> files = textURIListToFileList(data);
                                                importFileList(files, dropPoint);
                                                success = true;
                                        } else if (dragboard.hasContent(_URIListDataflavorCharArray)) {
                                                char[] data = (char[]) dragboard.getContent(_URIListDataflavorCharArray);
                                                String uriString = new String(data);
                                                List<File> files = textURIListToFileList(uriString);
                                                importFileList(files, dropPoint);
                                                success = true;
                                        } else if (dragboard.hasString()) {
                                                String str = dragboard.getString();
                                                if (str != null && str.length() > 0) {
                                                        importString(str, dropPoint);
                                                        success = true;
                                                }
                                        }
                                } catch (IOException e) {
                                        e.printStackTrace();
                                        MessageBay.displayMessage("Failed to import data in Expeditee");
                                }
                                event.setDropCompleted(success);
                                event.consume();
                        }
                });
        }

}