Display Utility Associations - move styling from CSS into main java class (#537)

* move styling from CSS into main java class

* Update DisplayUtilityAssociationsSample.java

* remove CSS file, style in java file

Author: JonLavi

utility_network/display-utility-associations/src/main/java/com/esri/samples/display_utility_associations/DisplayUtilityAssociationsSample.java

@@ -30,6 +30,7 @@
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
 import javafx.scene.layout.*;
+import javafx.scene.paint.Paint;
 import javafx.stage.Stage;
 
 import com.esri.arcgisruntime.concurrent.ListenableFuture;
@@ -61,8 +62,7 @@ public void start(Stage stage) {
       // create stack pane and application scene
       StackPane stackPane = new StackPane();
       Scene scene = new Scene(stackPane);
-      scene.getStylesheets().add(getClass().getResource("/display_utility_associations/style.css").toExternalForm());
-      
+
       // set title, size, and add scene to stage
       stage.setTitle("Display Utility Associations Sample");
       stage.setWidth(800);
@@ -136,13 +136,19 @@ else if (networkSource.getSourceType() == UtilityNetworkSource.Type.JUNCTION) {
 
       // create a legend
       GridPane gridPane = new GridPane();
-      gridPane.getStyleClass().add("grid-pane");
       gridPane.getColumnConstraints().addAll(Arrays.asList(new ColumnConstraints(25), new ColumnConstraints(100)));
       gridPane.add(attachmentImageView, 0, 0);
       gridPane.add(attachmentLabel, 1, 0);
       gridPane.add(connectivityImageView, 0, 1);
       gridPane.add(connectivityLabel, 1, 1);
-      
+      gridPane.setMaxWidth(100);
+      gridPane.setMaxHeight(80);
+      gridPane.setBackground(new Background(new BackgroundFill(Paint.valueOf("rgba(255,255,255,0.3)"), CornerRadii.EMPTY,
+              Insets.EMPTY)));
+      gridPane.setPadding(new Insets(10));
+      gridPane.setVgap(20);
+      gridPane.setAlignment(Pos.CENTER);
+
       // add the map view and legend to the stack pane
       stackPane.getChildren().addAll(mapView, gridPane);
       StackPane.setAlignment(gridPane, Pos.TOP_LEFT);