- Nodes
- Scenes
The gesture source and gesture target can belong to a single JavaFX application or to two different JavaFX or Java Client applications. Moreover, drag-and-drop can be implemented between a JavaFX application and a third-party (native) application such as Windows Explorer or a desktop.
Example:
In this example, we create four Text object. All of them are set as both drag-and-drop source and target.
package javafx_draganddrop; import javafx.application.Application; import javafx.event.EventHandler; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.input.*; import javafx.scene.paint.Color; import javafx.scene.text.Text; import javafx.stage.Stage; /** * * @web http://java-buddy.blogspot.com/ */ public class JavaFX_DragAndDrop extends Application { /** * @param args the command line arguments */ public static void main(String[] args) { launch(args); } @Override public void start(Stage primaryStage) { primaryStage.setTitle("java-buddy.blogspot.com"); Group root = new Group(); Scene scene = new Scene(root, 350, 300); final Text text1 = new Text(50, 100, "TEXT 1"); text1.setScaleX(2.0); text1.setScaleY(2.0); final Text text2 = new Text(250, 100, "TEXT 2"); text2.setScaleX(2.0); text2.setScaleY(2.0); final Text text3 = new Text(50, 200, "TEXT 3"); text3.setScaleX(2.0); text3.setScaleY(2.0); final Text text4 = new Text(250, 200, "TEXT 4"); text4.setScaleX(2.0); text4.setScaleY(2.0); setupGestureSource(text1); setupGestureTarget(text1); setupGestureSource(text2); setupGestureTarget(text2); setupGestureSource(text3); setupGestureTarget(text3); setupGestureSource(text4); setupGestureTarget(text4); root.getChildren().addAll(text1, text2, text3, text4); primaryStage.setScene(scene); primaryStage.show(); primaryStage.show(); } void setupGestureSource(final Text source){ source.setOnDragDetected(new EventHandler <MouseEvent>() { @Override public void handle(MouseEvent event) { /* drag was detected, start drag-and-drop gesture*/ System.out.println("onDragDetected"); /* allow any transfer mode */ Dragboard db = source.startDragAndDrop(TransferMode.ANY); /* put a string on dragboard */ ClipboardContent content = new ClipboardContent(); content.putString(source.getText()); db.setContent(content); event.consume(); } }); source.setOnDragDone(new EventHandler <DragEvent>() { @Override public void handle(DragEvent event) { /* the drag-and-drop gesture ended */ System.out.println("onDragDone"); /* if the data was successfully moved, clear it */ if (event.getTransferMode() == TransferMode.MOVE) { source.setText(""); } event.consume(); } }); } void setupGestureTarget(final Text target){ target.setOnDragOver(new EventHandler <DragEvent>() { @Override public void handle(DragEvent event) { /* data is dragged over the target */ System.out.println("onDragOver"); /* accept it only if it is not dragged from the same node * and if it has a string data */ if (event.getGestureSource() != target && event.getDragboard().hasString()) { /* allow for both copying and moving, whatever user chooses */ event.acceptTransferModes(TransferMode.COPY_OR_MOVE); } event.consume(); } }); target.setOnDragEntered(new EventHandler <DragEvent>() { @Override public void handle(DragEvent event) { /* the drag-and-drop gesture entered the target */ System.out.println("onDragEntered"); /* show to the user that it is an actual gesture target */ if (event.getGestureSource() != target && event.getDragboard().hasString()) { target.setFill(Color.GREEN); } event.consume(); } }); target.setOnDragExited(new EventHandler <DragEvent>() { @Override public void handle(DragEvent event) { /* mouse moved away, remove the graphical cues */ target.setFill(Color.BLACK); event.consume(); } }); target.setOnDragDropped(new EventHandler <DragEvent>() { @Override public void handle(DragEvent event) { /* data dropped */ System.out.println("onDragDropped"); /* if there is a string data on dragboard, read it and use it */ Dragboard db = event.getDragboard(); boolean success = false; if (db.hasString()) { target.setText(target.getText() + "\n" + db.getString()); success = true; } /* let the source know whether the string was successfully * transferred and used */ event.setDropCompleted(success); event.consume(); } }); } }
Reference: http://docs.oracle.com/javafx/2.0/drag_drop/jfxpub-drag_drop.htm
More demonstration of JavaFX 2.0 drag-and-drop:
Between two copy of the same JavaFX 2.0 application.
Between JavaFX 2.0 application and Google Chrome.
Related article:
- JavaFX 2.0: Implement GestureTarget of Drag and Drop for Image
Hi, thanks for this beautiful blog, I am working with JavaFX 2 and I am very happy for this great blog.
ReplyDeleteI am facing some problem in JavaFX 2, I wonder if I can ask you some help: my email is acepsut@gmail.com and Skype : acepsut
Thank you very much!
Alberto