Updating image and sorting out the slider ticks

Author: mark8487

src/main/java/com/esri/samples/mapview/map_rotation/MapRotation.png

@@ -55,6 +55,9 @@ public void start(Stage stage) throws Exception {
       // create a slider with a range of 360 units and start it half way
       Slider slider = new Slider(-180.0, 180.0, 0.0);
       slider.setMaxWidth(240.0);
+      slider.setShowTickLabels(true);
+      slider.setShowTickMarks(true);
+      slider.setMajorTickUnit(90);
       slider.setDisable(true);
 
       // listen for the value in the slider to change