Issue With Drag-n-Drop

[Kevin Rushforth]

Please file a bug with a complete test program and instructions as to 
how to reproduce it.

-- Kevin


Sirish Vadala wrote:
> «« NOTE: I have posted the same question on stackoverflow.com
> <http://stackoverflow.com/questions/31886709/drag-and-drop-an-email-attachment-into-a-javafx-8-application>
> . »»
>
> 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 [Running on Microsoft Outlook Professional Plus 2010].
>
> // 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 it 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.
>
> Thanks. -SV-
>