modules/controls/src/main/java/com/sun/javafx/scene/control/skin/ProgressIndicatorSkin.java

*** 191,200 ****
--- 191,203 ----
          registerChangeListener(control.indeterminateProperty(), "INDETERMINATE");
          registerChangeListener(control.progressProperty(), "PROGRESS");
          registerChangeListener(control.visibleProperty(), "VISIBLE");
          registerChangeListener(control.parentProperty(), "PARENT");
          registerChangeListener(control.sceneProperty(), "SCENE");
+         if ((control.getScene() != null) && (control.getScene().getWindow() != null)) {
+             registerChangeListener(control.getScene().getWindow().showingProperty(), "WINDOWSHOWING");
+         }
  
          initialize();
      }
  
  
*** 215,224 ****
--- 218,229 ----
              updateAnimation();
          } else if ("PARENT".equals(p)) {
              updateAnimation();
          } else if ("SCENE".equals(p)) {
              updateAnimation();
+         } else if ("WINDOWSHOWING".equals(p)) {
+             updateAnimation();
          }
      }
  
      protected void initialize() {
          boolean isIndeterminate = control.isIndeterminate();
*** 291,301 ****
  
      protected void updateAnimation() {
          ProgressIndicator control = getSkinnable();
          final boolean isTreeVisible = control.isVisible() &&
                                        control.getParent() != null &&
!                                       control.getScene() != null;
          if (indeterminateTransition != null) {
              pauseTimeline(! isTreeVisible);
          } else if (isTreeVisible) {
              createIndeterminateTimeline();
          }
--- 296,308 ----
  
      protected void updateAnimation() {
          ProgressIndicator control = getSkinnable();
          final boolean isTreeVisible = control.isVisible() &&
                                        control.getParent() != null &&
!                                       control.getScene() != null &&
!                                       control.getScene().getWindow() != null &&
!                                       control.getScene().getWindow().isShowing();
          if (indeterminateTransition != null) {
              pauseTimeline(! isTreeVisible);
          } else if (isTreeVisible) {
              createIndeterminateTimeline();
          }