modules/graphics/src/main/java/com/sun/javafx/tk/quantum/GlassSceneDnDEventHandler.java

*** 44,59 ****
          this.scene = scene;
      }
  
      // Drop target handlers
  
!     private double getPlatformScale() {
          View view = scene.getPlatformView();
          if (view != null) {
              Window w = view.getWindow();
              if (w != null) {
!                 return w.getPlatformScale();
              }
          }
          return 1.0;
      }
  
--- 44,70 ----
          this.scene = scene;
      }
  
      // Drop target handlers
  
!     private double getPlatformScaleX() {
          View view = scene.getPlatformView();
          if (view != null) {
              Window w = view.getWindow();
              if (w != null) {
!                 return w.getPlatformScaleX();
!             }
!         }
!         return 1.0;
!     }
! 
!     private double getPlatformScaleY() {
!         View view = scene.getPlatformView();
!         if (view != null) {
!             Window w = view.getWindow();
!             if (w != null) {
!                 return w.getPlatformScaleY();
              }
          }
          return 1.0;
      }
  
*** 62,75 ****
                                          final ClipboardAssistance dropTargetAssistant)
      {
          assert Platform.isFxApplicationThread();
          return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
              if (scene.dropTargetListener != null) {
!                 double pScale = getPlatformScale();
                  QuantumClipboard dragboard =
                          QuantumClipboard.getDragboardInstance(dropTargetAssistant, false);
!                 return scene.dropTargetListener.dragEnter(x / pScale, y / pScale, xAbs / pScale, yAbs / pScale,
                          recommendedTransferMode, dragboard);
              }
              return null;
          }, scene.getAccessControlContext());
      }
--- 73,87 ----
                                          final ClipboardAssistance dropTargetAssistant)
      {
          assert Platform.isFxApplicationThread();
          return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
              if (scene.dropTargetListener != null) {
!                 double pScaleX = getPlatformScaleX();
!                 double pScaleY = getPlatformScaleY();
                  QuantumClipboard dragboard =
                          QuantumClipboard.getDragboardInstance(dropTargetAssistant, false);
!                 return scene.dropTargetListener.dragEnter(x / pScaleX, y / pScaleY, xAbs / pScaleX, yAbs / pScaleY,
                          recommendedTransferMode, dragboard);
              }
              return null;
          }, scene.getAccessControlContext());
      }
*** 89,100 ****
                                         final ClipboardAssistance dropTargetAssistant)
      {
          assert Platform.isFxApplicationThread();
          return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
              if (scene.dropTargetListener != null) {
!                 double pScale = getPlatformScale();
!                 return scene.dropTargetListener.drop(x / pScale, y / pScale, xAbs / pScale, yAbs / pScale,
                          recommendedTransferMode);
              }
              return null;
          }, scene.getAccessControlContext());
      }
--- 101,113 ----
                                         final ClipboardAssistance dropTargetAssistant)
      {
          assert Platform.isFxApplicationThread();
          return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
              if (scene.dropTargetListener != null) {
!                 double pScaleX = getPlatformScaleX();
!                 double pScaleY = getPlatformScaleY();
!                 return scene.dropTargetListener.drop(x / pScaleX, y / pScaleY, xAbs / pScaleX, yAbs / pScaleY,
                          recommendedTransferMode);
              }
              return null;
          }, scene.getAccessControlContext());
      }
*** 104,115 ****
                                         final ClipboardAssistance dropTargetAssistant)
      {
          assert Platform.isFxApplicationThread();
          return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
              if (scene.dropTargetListener != null) {
!                 double pScale = getPlatformScale();
!                 return scene.dropTargetListener.dragOver(x / pScale, y / pScale, xAbs / pScale, yAbs / pScale,
                          recommendedTransferMode);
              }
              return null;
          }, scene.getAccessControlContext());
      }
--- 117,129 ----
                                         final ClipboardAssistance dropTargetAssistant)
      {
          assert Platform.isFxApplicationThread();
          return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
              if (scene.dropTargetListener != null) {
!                 double pScaleX = getPlatformScaleX();
!                 double pScaleY = getPlatformScaleY();
!                 return scene.dropTargetListener.dragOver(x / pScaleX, y / pScaleY, xAbs / pScaleX, yAbs / pScaleY,
                          recommendedTransferMode);
              }
              return null;
          }, scene.getAccessControlContext());
      }
*** 124,138 ****
                                  final ClipboardAssistance dragSourceAssistant)
      {
          assert Platform.isFxApplicationThread();
          AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
              if (scene.dragGestureListener != null) {
!                 double pScale = getPlatformScale();
                  QuantumClipboard dragboard =
                          QuantumClipboard.getDragboardInstance(dragSourceAssistant, true);
                  scene.dragGestureListener.dragGestureRecognized(
!                         x / pScale, y / pScale, xAbs / pScale, yAbs / pScale, button, dragboard);
              }
              return null;
          }, scene.getAccessControlContext());
      }
  
--- 138,153 ----
                                  final ClipboardAssistance dragSourceAssistant)
      {
          assert Platform.isFxApplicationThread();
          AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
              if (scene.dragGestureListener != null) {
!                 double pScaleX = getPlatformScaleX();
!                 double pScaleY = getPlatformScaleY();
                  QuantumClipboard dragboard =
                          QuantumClipboard.getDragboardInstance(dragSourceAssistant, true);
                  scene.dragGestureListener.dragGestureRecognized(
!                         x / pScaleX, y / pScaleY, xAbs / pScaleX, yAbs / pScaleY, button, dragboard);
              }
              return null;
          }, scene.getAccessControlContext());
      }