package sample;

import java.awt.BorderLayout;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.List;
 
import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.TextArea;
import javafx.scene.input.DragEvent;
import javafx.scene.input.Dragboard;
import javafx.scene.input.TransferMode;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.FlowPane;
 
import javax.swing.JFrame;
 
public class Sample {
 
    private TextArea dropArea;
    private Scene theScene;
 
    private final static FlowPane demoBar = new FlowPane();
 
    public static void main(String[] args) {
 
 
        Sample m = new Sample();
        m.start();
 
    }
 
    public void start() {
 
        JFrame frame = new JFrame();
        final JFXPanel pfx = new JFXPanel();
        frame.add(pfx, BorderLayout.NORTH);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setBounds(0, 0, 500, 200);
        frame.setVisible(true);
 
        Platform.runLater(new Runnable() {
 
            @Override
            public void run() {
 
                constructDemoBar();
                initFX(pfx);
 
            }
        });
    }
 
    private void initFX(JFXPanel pfx) {
 
        BorderPane p = new BorderPane();
        p.setPrefHeight(20);
        p.setStyle("-fx-background-color:#FFCC00");
        p.setTop(demoBar);
 
        theScene = new Scene(p);
        pfx.setScene(theScene);
 
    }
 
    public final void constructDemoBar() {
 
        FlowPane posPan = new FlowPane();
 
        dropArea = new TextArea("DROP AREA");
 
        dropArea.setOnDragOver(new EventHandler<DragEvent>() {
            @Override
            public void handle(DragEvent event) {
                /* data is dragged over the target */
                /* accept it only if it is not dragged from the same node
                 * and if it has file list data */
                if (event.getGestureSource() != dropArea && event.getDragboard().hasFiles()) {
                    /* allow for both copying and moving, whatever user chooses */
                    event.acceptTransferModes(TransferMode.COPY_OR_MOVE);
                }
 
                event.consume();
            }
        });
        dropArea.setOnDragEntered(new EventHandler<DragEvent>() {
            @Override
            public void handle(DragEvent event) {
                /* the drag-and-drop gesture entered the target */
                /* show to the user that it is an actual gesture target */
                if (event.getGestureSource() != dropArea && event.getDragboard().hasFiles()) {
                    dropArea.setStyle("-fx-background-color:#00FF00");
                }
 
                event.consume();
            }
        });
        dropArea.setOnDragExited(new EventHandler<DragEvent>() {
            @Override
            public void handle(DragEvent event) {
                /* mouse moved away, remove the graphical cues */
                dropArea.setStyle("-fx-background-color:#FFFFFF");
 
                event.consume();
            }
        });
        dropArea.setOnDragDropped(new EventHandler<DragEvent>() {
            @Override
            public void handle(final DragEvent event) {
                /* data dropped */
                /* if there is a string data on dragboard, read it and use it */
 
 
                Dragboard db = event.getDragboard();
                boolean success = false;
                if (db.hasFiles()) {
 
                    success = true;
 
                } else {
 
                    event.setDropCompleted(false);
                    return;
 
                }
 
                List<File> files = db.getFiles();
                //<--Exception here
                FileReader fr;
                try {
 
                    fr = new FileReader(files.get(0));
 
                    BufferedReader br = new BufferedReader(fr);
                    dropArea.setText(Boolean.toString(db.getFiles() != null));
 
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                
                event.setDropCompleted(true);
 
                event.consume();
            }
        });
 
        posPan.getChildren().add(dropArea);
        demoBar.getChildren().add(posPan);
 
    }
}