Add property to configure the 'not_enabled' css styling for widgets

Author: rjwills28

app/display/representation-javafx/src/main/java/org/csstudio/display/builder/representation/javafx/JFXPreferences.java

@@ -24,6 +24,8 @@ public class JFXPreferences
     @Preference public static int tooltip_display_sec;
     /** make the transparent parts of symbols clickable */
     @Preference public static boolean pick_on_bounds;
+    /** Override the default 'not_enabled' css style */
+    @Preference public static String not_enabled_style;
 
     static
     {

app/display/representation-javafx/src/main/java/org/csstudio/display/builder/representation/javafx/widgets/JFXBaseRepresentation.java

@@ -27,6 +27,7 @@
 import org.csstudio.display.builder.model.widgets.TabsWidget.TabItemProperty;
 import org.csstudio.display.builder.representation.WidgetRepresentation;
 import org.csstudio.display.builder.representation.javafx.Cursors;
+import org.csstudio.display.builder.representation.javafx.JFXPreferences;
 import org.csstudio.display.builder.representation.javafx.JFXRepresentation;
 
 import javafx.collections.ObservableList;
@@ -371,10 +372,15 @@ public void updateOrder()
     public void setDisabledLook(Boolean enabled, ObservableList<Node> children) {
         if (!toolkit.isEditMode()) {
             jfx_node.setCursor(enabled ? Cursor.DEFAULT : Cursors.NO_WRITE);
-            if (children != null) {
+            if (children != null && !enabled) {
                 for (Node node : children)
                 {
-                    Styles.update(node, Styles.NOT_ENABLED, !enabled);
+                	if (!JFXPreferences.not_enabled_style.equals(""))
+                        // Apply users 'not enabled' style
+                        node.setStyle(node.getStyle()+" "+JFXPreferences.not_enabled_style);
+                    else
+                        // Apply default 'not_enabled' style
+                        Styles.update(node, Styles.NOT_ENABLED, !enabled);
                 }   
             }
         }

app/display/representation-javafx/src/main/resources/jfx_repr_preferences.properties

@@ -22,3 +22,10 @@ tooltip_display_sec=30
 # of the symbol widget. If false, interaction is
 # limited to the visible area of the element.
 pick_on_bounds=false
+
+# User can set the disabled/not_enabled css styling. Otherwise
+# the default will be used which sets the opacity to 0.4.
+# E.g. to not change the opacity set 
+# not_enabled_style=-fx-opacity: 1.0;-fx-background-insets: 0;
+#  -fx-color: -fx-base; -fx-focus-color: -fx-base;
+not_enabled_style=