Example usage for javafx.scene.input Dragboard hasContent

Introduction

In this page you can find the example usage for javafx.scene.input Dragboard hasContent.

Prototype

public final boolean hasContent(DataFormat dataFormat) 

Source Link

Document

Tests whether there is any content on this clipboard of the given DataFormat type.

Usage

From source file:com.rockhoppertech.symchords.fx.SymChordsController.java

protected void setupDragonDrop() {
    Image image = new Image(getClass().getResourceAsStream("/images/rocky-32-trans.png"));
    dragImageView = new ImageView(image);
    dragImageView.setFitHeight(32);/*w  w  w. j  av  a2s .  c om*/
    dragImageView.setFitWidth(32);

    grandStaff.setOnDragDetected(new EventHandler<MouseEvent>() {

        @Override
        public void handle(MouseEvent me) {

            if (!root.getChildren().contains(dragImageView)) {
                root.getChildren().add(dragImageView);
            }

            // dragImageView.setOpacity(0.5);
            dragImageView.toFront();
            dragImageView.setMouseTransparent(true);
            dragImageView.setVisible(true);
            dragImageView.relocate((int) (me.getSceneX() - dragImageView.getBoundsInLocal().getWidth() / 2),
                    (int) (me.getSceneY() - dragImageView.getBoundsInLocal().getHeight() / 2));

            Dragboard db = grandStaff.startDragAndDrop(TransferMode.ANY);

            // TODO remove the custom image nonsense in javafx 8
            // javafx 8
            // db.setDragView(dragImageView);

            ClipboardContent content = new ClipboardContent();
            // MIDITrack track = grandStaff.getMIDITrack();
            MIDITrack track = model.getMIDITrack();
            content.put(midiTrackDataFormat, track);
            db.setContent(content);
            me.consume();
        }
    });

    grandStaff.setOnDragDone(new EventHandler<DragEvent>() {
        public void handle(DragEvent e) {
            dragImageView.setVisible(false);
            e.consume();
        }
    });

    // Parent root = grandStaff.getScene().getRoot();
    // stage.getScene().getRoot();

    if (root != null) {
        root.setOnDragOver(new EventHandler<DragEvent>() {
            public void handle(DragEvent e) {
                Point2D localPoint = grandStaff.getScene().getRoot()
                        .sceneToLocal(new Point2D(e.getSceneX(), e.getSceneY()));
                dragImageView.relocate(
                        (int) (localPoint.getX() - dragImageView.getBoundsInLocal().getWidth() / 2),
                        (int) (localPoint.getY() - dragImageView.getBoundsInLocal().getHeight() / 2));
                e.consume();
            }
        });
    }

    trackList.setOnDragOver(new EventHandler<DragEvent>() {
        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 MIDITrack data
             */
            if (event.getGestureSource() != trackList && event.getDragboard().hasContent(midiTrackDataFormat)) {
                logger.debug("drag over");
                /* allow for both copying and moving, whatever user chooses */
                event.acceptTransferModes(TransferMode.COPY_OR_MOVE);
            }

            // Don't consume the event. Let the layers below process the
            // DragOver event as well so that the
            // translucent container image will follow the cursor.
            // event.consume();
        }
    });

    trackList.setOnDragEntered(new EventHandler<DragEvent>() {
        public void handle(DragEvent event) {
            /* the drag-and-drop gesture entered the target */
            /* show to the user that it is an actual gesture target */
            logger.debug("drag entered");
            if (event.getGestureSource() != trackList && event.getDragboard().hasContent(midiTrackDataFormat)) {
                DropShadow dropShadow = new DropShadow();
                dropShadow.setRadius(5.0);
                dropShadow.setOffsetX(3.0);
                dropShadow.setOffsetY(3.0);
                dropShadow.setColor(Color.color(0.4, 0.5, 0.5));
                trackList.setEffect(dropShadow);
            }
            event.consume();
        }
    });

    trackList.setOnDragExited(new EventHandler<DragEvent>() {
        public void handle(DragEvent event) {
            /* mouse moved away, remove the graphical cues */
            trackList.setEffect(null);
            event.consume();
        }
    });

    trackList.setOnDragDropped(new EventHandler<DragEvent>() {
        public void handle(DragEvent event) {

            Dragboard db = event.getDragboard();
            boolean success = false;
            if (db.hasContent(midiTrackDataFormat)) {
                MIDITrack track = (MIDITrack) db.getContent(midiTrackDataFormat);
                trackList.getItems().add(track);
                success = true;

            }
            /*
             * let the source know whether the data was successfully
             * transferred and used
             */
            event.setDropCompleted(success);
            event.consume();
        }
    });

    logger.debug("jvm mime {}", DataFlavor.javaJVMLocalObjectMimeType);
}

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