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  1. JDK
  2. JDK-8123120

Drag and Drop doesn't work in JFXPanel

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P4
    • Resolution: Duplicate
    • Affects Version/s: 8
    • Fix Version/s: None
    • Component/s: javafx
    • Environment:

      Happens on both Windows and Mac

      Description

      JFXPanel drag and drop seems to have broken somewhere between 2.2.3 and 8.0.0. The included code demonstrates the issue. When dragging file(s) onto the Scene, it works as expected in a normal fx Scene, but no longer works when that Scene is inside a JFXPanel. The issue isn't present if you build with Java 7.

      The code opens two windows, a JFrame with a JFXPanel, and a JavaFx Stage. Both are given identical Scenes.
      Try dragging a file into each Scene. In Java 7 (2.2.3) both respond as expected by telling you what file you are dragging over them. In Java 8 the Dragboard doesn't get populated properly when dragged over the scene inside the JFXPanel. I haven't checked everything in the Dragboard, but I know that getFiles() and getContentTypes() are both empty. Let me know if you have any questions.

      Thanks!!


      import javafx.application.Application;
      import javafx.application.Platform;
      import javafx.embed.swing.JFXPanel;
      import javafx.event.EventHandler;
      import javafx.scene.Scene;
      import javafx.scene.control.Label;
      import javafx.scene.input.DragEvent;
      import javafx.stage.Stage;

      import javax.swing.JFrame;

      public class JFXPanelTestFileDrag extends Application
      {
      /**
      * Creates a simple Scene with some dragOver handling
      * @return
      */
      private static Scene createScene()
      {
      final Label label = new Label("Drag a file here...");
      Scene scene = new Scene(label);
      scene.setOnDragOver(new EventHandler<DragEvent>()
      {
      @Override
      public void handle(DragEvent event)
      {
      if (event.getDragboard().getFiles().isEmpty()) //JFXPanel isn't properly translating the Files
      label.setText("NO FILES!!!");
      else
      label.setText(event.getDragboard().getFiles() + "");
      }
      });

      return scene;
      }

      public static void main(String[] args)
      {
      launchSwing();
      launch();
      }

      /**
      * Creates a simple JFrame with a JFXPanel containing the scene
      */
      private static void launchSwing()
      {
      JFrame frame = new JFrame("Swing Frame");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      final JFXPanel fxPanel = new JFXPanel();
      Platform.runLater(new Runnable()
      {
      @Override
      public void run()
      {
      fxPanel.setScene(createScene());
      }
      });
      frame.setContentPane(fxPanel);
      frame.setSize(200, 200);
      frame.setVisible(true);
      }

      /**
      * starts the fx application with a scene identical to that created by launchSwing
      */
      @Override
      public void start(Stage primaryStage) throws Exception
      {
      primaryStage.setTitle("FX Frame");
      primaryStage.setScene(createScene());
      primaryStage.setWidth(200);
      primaryStage.setHeight(200);
      primaryStage.show();
      }
      }

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              • Assignee:
                art Artem Ananiev
                Reporter:
                duke J. Duke (Inactive)
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                Dates

                • Created:
                  Updated:
                  Resolved:
                  Imported: