Drag and Drop an email attachment into a javafx 8 application - email

Question

I am trying to implement a requirement to drag and drop documents attached in an email into a JavaFX 8 application running on jdk 8b45. I am able to drag and drop from any folder on my computer but not from an email attachment.
// MY VBOX WHERE I WANT TO DROP FILES INTO
VBox bkgrndDocsVBox = new VBox(10.0);
bkgrndDocsVBox.setPadding(new Insets(15, 10, 5, 10));
bkgrndDocsVBox.setStyle("-fx-border-color: transparent;");
bkgrndDocsVBox.setOnDragOver((final DragEvent event) -> {
mouseDragOver(event, bkgrndDocsVBox);
});
bkgrndDocsVBox.setOnDragDropped((final DragEvent event) -> {
mouseDragDropped(event, backgroundDocsDataTable);
});
bkgrndDocsVBox.setOnDragExited((final DragEvent event) -> {
bkgrndDocsVBox.setStyle("-fx-border-color: transparent;");
});
..............................
..............................
private void mouseDragOver(DragEvent dragEvent, VBox bkgrndDocsVBox) {
final Dragboard dragboard = dragEvent.getDragboard();
System.out.println("dragboard.hasFiles()::"+dragboard.hasFiles());
if (dragboard.hasFiles()) {
bkgrndDocsVBox.setStyle("-fx-border-color: green;");
dragEvent.acceptTransferModes(TransferMode.ANY);
} else {
dragEvent.consume();
}
}
..............................
..............................
private void mouseDragDropped(DragEvent dragEvent, TableView<BgDocBean> bgDocsTable) {
System.out.println("ENTER mouseDragDropped");
final Dragboard dragBoard = dragEvent.getDragboard();
boolean success = false;
boolean isAccepted = false;
// SAVE the FILES into the DATABASE
.......... .......... .......... ..........
.......... .......... .......... ..........
}
The above code works when I try to drag and drop files from a windows folder. However when I try to drag and drop files from an email attachment, the 'dragboard.hasFiles()::false' is displayed on the console and the functionality does not work.
Please see the fully functional POC below:
import javafx.util.Duration;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.input.*;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Text;
import javafx.stage.Stage;
public class HelloDragAndDrop extends Application {
#Override
public void start(Stage stage) {
stage.setTitle("Hello Drag And Drop");
VBox root = new VBox();
root.setStyle("-fx-border-color: transparent;");
root.setAlignment(Pos.CENTER);
Scene scene = new Scene(root, 400, 200);
scene.setFill(Color.WHITESMOKE);
Text target = new Text("DROP HERE");
target.setScaleX(2.0);
target.setScaleY(2.0);
root.setOnDragOver((DragEvent event) -> {
System.out.println("onDragOver");
System.out.println("event.getDragboard().hasFiles()::" + event.getDragboard().hasFiles());
if (event.getGestureSource() != root && event.getDragboard().hasFiles()) {
event.acceptTransferModes(TransferMode.ANY);
}
event.consume();
});
root.setOnDragEntered((DragEvent event) -> {
System.out.println("onDragEntered");
if (event.getGestureSource() != root && event.getDragboard().hasFiles()) {
root.setStyle("-fx-border-color: green;");
}
event.consume();
});
root.setOnDragExited((DragEvent event) -> {
root.setStyle("-fx-border-color: transparent;");
event.consume();
});
root.setOnDragDropped((DragEvent event) -> {
System.out.println("onDragDropped");
Dragboard db = event.getDragboard();
System.out.println("db.hasFiles()::" + db.hasFiles());
boolean success = false;
if (db.hasFiles()) {
target.setText("SUCCESSFULLY DROPPED");
success = true;
}
event.setDropCompleted(success);
event.consume();
Timeline timeline = new Timeline(
new KeyFrame(Duration.seconds(2), (ActionEvent actionEvent) -> {
target.setText("DROP HERE");
}),
new KeyFrame(Duration.seconds(5))
);
timeline.setCycleCount(1);
timeline.play();
});
root.getChildren().add(target);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
Application.launch(args);
}
}
On my console if always displays 'event.getDragboard().hasFiles()::false' when I drag and drop an attachment from Microsoft Outlook Professional Plus 2010.
I would highly appreciate any hints on how this could be successfully implemented. Thanks.