Display: Support 'class' for array/struct properties

app/display/editor/src/main/java/org/csstudio/display/builder/editor/app/DisplayEditorInstance.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2017-2020 Oak Ridge National Laboratory.
+ * Copyright (c) 2017-2022 Oak Ridge National Laboratory.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -22,6 +22,7 @@
 import org.csstudio.display.builder.editor.EditorGUI;
 import org.csstudio.display.builder.editor.EditorUtil;
 import org.csstudio.display.builder.editor.Messages;
+import org.csstudio.display.builder.editor.WidgetSelectionHandler;
 import org.csstudio.display.builder.editor.actions.ActionDescription;
 import org.csstudio.display.builder.model.DisplayModel;
 import org.csstudio.display.builder.model.ModelPlugin;
@@ -386,9 +387,20 @@ void loadWidgetClasses()
         ModelThreadPool.getExecutor().execute(() ->
         {
             // get widget classes and apply to model
+            // (which triggers editor UI updates, so perform in UI thread)
             final DisplayModel model = editor_gui.getDisplayEditor().getModel();
             if (model != null)
-                WidgetClassesService.getWidgetClasses().apply(model);
+                Platform.runLater( () ->
+                {
+                    // Save/restore selection to force update of property panel
+                    final WidgetSelectionHandler selection = editor_gui.getDisplayEditor().getWidgetSelectionHandler();
+                    final List<Widget> save = selection.getSelection();
+                    selection.clear();
+                    // Apply class settings
+                    WidgetClassesService.getWidgetClasses().apply(model);
+                    // Restore selection
+                    selection.setSelection(save);
+                });
         });
     }
 

app/display/editor/src/main/java/org/csstudio/display/builder/editor/properties/PropertyPanelSection.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015-2018 Oak Ridge National Laboratory.
+ * Copyright (c) 2015-2022 Oak Ridge National Laboratory.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -499,19 +499,22 @@ else if (property instanceof PointsWidgetProperty)
      *  @param property Property (on primary widget)
      *  @param other Zero or more additional widgets that have same type of property
      *  @param structureIndex Index of the array structure (element) being added. It is meaningful
-     *                        only for properties instance of {@link StructuredWidgetProperty}.
+     *                        only for properties instance of {@link StructuredWidgetProperty}
+     *  @param indentationLevel Indentation level
      */
     private void createPropertyUI(
         final UndoableActionManager undo,
         final WidgetProperty<?> property,
         final List<Widget> other,
         final int structureIndex,
-        final int indentationLevel
-    ) {
+        final int indentationLevel)
+    {
         // Skip runtime properties
         if (property.getCategory() == WidgetPropertyCategory.RUNTIME)
             return;
 
+        // System.out.println("Index " + structureIndex + ", level " + indentationLevel + ": " + property.getPath());
+
         final Label label = new Label(property.getDescription());
         label.setMaxWidth(Double.MAX_VALUE);
         final String tooltip = property.getDescription() + " (" + property.getPath() + ")";
@@ -567,9 +570,7 @@ else if (property instanceof RulesWidgetProperty)
             field = rules_field;
         }
         else if (property instanceof StructuredWidgetProperty)
-        {   // Don't allow editing structures and their elements in class mode
-            if (class_mode)
-                return;
+        {
             final StructuredWidgetProperty struct = (StructuredWidgetProperty) property;
             final Label header = new Label(struct.getDescription() + ( structureIndex > 0 ? " " + String.valueOf(1 + structureIndex) : ""));
             header.getStyleClass().add("structure_property_name");
@@ -589,9 +590,7 @@ else if (property instanceof StructuredWidgetProperty)
             return;
         }
         else if (property instanceof ArrayWidgetProperty)
-        {   // Don't allow editing arrays and their elements in class mode
-            if (class_mode)
-                return;
+        {
             @SuppressWarnings("unchecked")
             final ArrayWidgetProperty<WidgetProperty<?>> array = (ArrayWidgetProperty<WidgetProperty<?>>) property;
 
@@ -611,6 +610,28 @@ else if (property instanceof ArrayWidgetProperty)
 
             fillHeaderIndent(indentationLevel, row);
             add(label, indentationLevel, row, 4 - indentationLevel, 1);
+
+            if (class_mode)
+            {   // Checkbox to select if array is included in class definition
+                final CheckBox check = new CheckBox();
+                check.setPadding(new Insets(0, 5, 0, 0));
+                check.setTooltip(use_class_tooltip);
+                final WidgetPropertyBinding<?,?> binding = new UseWidgetClassBinding(undo, check, spinner, property, other);
+                bindings.add(binding);
+                binding.bind();
+                add(check, 3, row);
+            }
+            else
+            {   // Show if property is set by the class, not editable.
+                final Label indicator = new Label();
+                indicator.setPadding(new Insets(0, 5, 0, 0));
+                indicator.setTooltip(using_class_tooltip);
+                final WidgetPropertyBinding<?,?> binding = new ShowWidgetClassBinding(spinner, property, indicator);
+                bindings.add(binding);
+                binding.bind();
+                add(indicator, 3, row);
+            }
+
             add(spinner, 4, row, 2 - indentationLevel, 1);
 
             Separator separator = new Separator();
@@ -683,14 +704,20 @@ else if (property instanceof ArrayWidgetProperty)
         {
             if (class_mode)
             {   // Class definition mode:
-                // Check box for 'use_class'
-                final CheckBox check = new CheckBox();
-                check.setPadding(new Insets(0, 5, 0, 0));
-                check.setTooltip(use_class_tooltip);
-                final WidgetPropertyBinding<?,?> binding = new UseWidgetClassBinding(undo, check, field, property, other);
-                bindings.add(binding);
-                binding.bind();
-                add(check, 3, row);
+                // Check box for 'use_class', but only on the top level
+                // For nested properties inside an array or struct,
+                // the class behavior is controlled at the top-level
+                // for the complete array or struct
+                if (indentationLevel == 0)
+                {
+                    final CheckBox check = new CheckBox();
+                    check.setPadding(new Insets(0, 5, 0, 0));
+                    check.setTooltip(use_class_tooltip);
+                    final WidgetPropertyBinding<?,?> binding = new UseWidgetClassBinding(undo, check, field, property, other);
+                    bindings.add(binding);
+                    binding.bind();
+                    add(check, 3, row);
+                }
             }
             else
             {   // Display file mode:

app/display/editor/src/main/java/org/csstudio/display/builder/editor/properties/UseWidgetClassBinding.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015-2017 Oak Ridge National Laboratory.
+ * Copyright (c) 2015-2022 Oak Ridge National Laboratory.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -55,13 +55,14 @@ public void bind()
         updateFromModel();
         jfx_node.setOnAction(event ->
         {
+            final boolean use_class = jfx_node.isSelected();
             updating = true;
-            property_field.setDisable(! jfx_node.isSelected());
-            undo.execute(new UseClassAction(widget_property, jfx_node.isSelected()));
+            property_field.setDisable(! use_class);
+            undo.execute(new UseClassAction(widget_property, use_class));
             for (Widget w : other)
             {
                 final WidgetProperty<?> other_prop = w.getProperty(widget_property.getName());
-                undo.execute(new UseClassAction(other_prop, jfx_node.isSelected()));
+                undo.execute(new UseClassAction(other_prop, use_class));
             }
             updating = false;
         });

app/display/model/src/main/java/org/csstudio/display/builder/model/ArrayWidgetProperty.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015-2016 Oak Ridge National Laboratory.
+ * Copyright (c) 2015-2022 Oak Ridge National Laboratory.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -111,15 +111,6 @@ protected ArrayWidgetProperty(final Descriptor<WPE> descriptor,
         value = new CopyOnWriteArrayList<>(elements);
     }
 
-    @Override
-    public boolean isUsingWidgetClass()
-    {   // Array uses class if any elements use it
-        for (WidgetProperty<?> element : value)
-            if (element.isUsingWidgetClass())
-                return true;
-        return false;
-    }
-
     @Override
     public boolean isDefaultValue()
     {
@@ -130,6 +121,15 @@ public boolean isDefaultValue()
                value.get(0).isDefaultValue();
     }
 
+    @Override
+    public void useWidgetClass(boolean use_class)
+    {
+        // Update overall array as well as each element
+        super.useWidgetClass(use_class);
+        for (WPE element : value)
+            element.useWidgetClass(use_class);
+    }
+
     @Override
     protected List<WPE> restrictValue(final List<WPE> requested_value)
     {
@@ -195,6 +195,8 @@ public WPE removeElement()
     /** @param element Element to add to end of list */
     public void addElement(final WPE element)
     {
+        // New elements get same class behavior as the array
+        element.useWidgetClass(use_class);
         value.add(element);
         firePropertyChange(null, Arrays.asList(element));
     }
@@ -239,8 +241,7 @@ public void setValueFromObject(final Object value) throws Exception
                     element.setValueFromObject(el_value);
             }
 
-            // Notify listeners of the whole array
-            firePropertyChange(this, null, this.value);
+            // Listeners already received remove/add/set events
         }
         catch (Throwable ex)
         {

app/display/model/src/main/java/org/csstudio/display/builder/model/StructuredWidgetProperty.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015-2016 Oak Ridge National Laboratory.
+ * Copyright (c) 2015-2022 Oak Ridge National Laboratory.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -66,16 +66,6 @@ protected StructuredWidgetProperty(final Descriptor descriptor,
         super(descriptor, widget, elements);
     }
 
-    /** @return <code>true</code> if any element is using class support */
-    @Override
-    public boolean isUsingWidgetClass()
-    {
-        for (WidgetProperty<?> element : value)
-            if (element.isUsingWidgetClass())
-                return true;
-        return false;
-    }
-
     /** @return <code>true</code> if all elements have default value */
     @Override
     public boolean isDefaultValue()
@@ -86,6 +76,15 @@ public boolean isDefaultValue()
         return true;
     }
 
+    @Override
+    public void useWidgetClass(boolean use_class)
+    {
+        // Update overall structure as well as each element
+        super.useWidgetClass(use_class);
+        for (WidgetProperty<?> element : value)
+            element.useWidgetClass(use_class);
+    }
+
     /** @return <code>true</code> if all elements are read-only */
     @Override
     public boolean isReadonly()
@@ -142,35 +141,42 @@ public void setValue(final List<WidgetProperty<?>> value)
     @Override
     public void setValueFromObject(final Object new_value) throws Exception
     {
-        if (new_value instanceof List)
-        {   // Allow assignment of another structure's value, i.e. list with same elements
-            final List<?> new_elements = (List<?>)new_value;
-            if (new_elements.size() != value.size())
-                throw new Exception("Elements of structure " + getName() + " must provide " + value.size() + " elements, got " + new_elements.size());
-            for (int i=0; i<value.size(); ++i)
-            {
-                final WidgetProperty<?> element = value.get(i);
-                final Object new_object = new_elements.get(i);
-                if (element.getClass() != new_object.getClass())
-                    throw new Exception("Cannot set structure " + getName() + "." + element.getName() + " to " + new_object);
-
-                final WidgetProperty<?> new_element = (WidgetProperty<?>)new_object;
-                if (element.getName() != new_element.getName())
-                    throw new Exception("Cannot set structure " + getName() + "." + element.getName() + " to " + new_element.getName());
-                try
-                {
-                    element.setValueFromObject(new_element.getValue());
-                }
-                catch (Exception ex)
-                {
-                    throw new Exception("Cannot set structure " + getName() + "." + element.getName() + " to " + new_element, ex);
-                }
-            }
-            // Notify listeners of the whole array
-            firePropertyChange(this, null, this.value);
+        final List<?> new_elements;
+
+        // May use other struct or list with elements
+        if (new_value instanceof StructuredWidgetProperty)
+        {
+            final StructuredWidgetProperty other = (StructuredWidgetProperty) new_value;
+            new_elements = other.value;
         }
+        else if (new_value instanceof List)
+            new_elements = (List<?>)new_value;
         else
             throw new Exception("Elements of structure " + getName() + " cannot be assigned from " + new_value);
+
+        // Either way, element count and names of elements must match this struct
+        if (new_elements.size() != value.size())
+            throw new Exception("Elements of structure " + getName() + " must provide " + value.size() + " elements, got " + new_elements.size());
+        for (int i=0; i<value.size(); ++i)
+        {
+            final WidgetProperty<?> element = value.get(i);
+            final Object new_object = new_elements.get(i);
+            if (element.getClass() != new_object.getClass())
+                throw new Exception("Cannot set structure " + getName() + "." + element.getName() + " to " + new_object);
+
+            final WidgetProperty<?> new_element = (WidgetProperty<?>)new_object;
+            if (element.getName() != new_element.getName())
+                throw new Exception("Cannot set structure " + getName() + "." + element.getName() + " to " + new_element.getName());
+            try
+            {
+                element.setValueFromObject(new_element.getValue());
+            }
+            catch (Exception ex)
+            {
+                throw new Exception("Cannot set structure " + getName() + "." + element.getName() + " to " + new_element, ex);
+            }
+        }
+        // Listeners have been notified about each element in setValueFromObject
     }
 
     @Override

app/display/model/src/main/java/org/csstudio/display/builder/model/WidgetProperty.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015-2016 Oak Ridge National Laboratory.
+ * Copyright (c) 2015-2022 Oak Ridge National Laboratory.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -227,15 +227,7 @@ public boolean isDefaultValue()
      */
     public void useWidgetClass(final boolean use_class)
     {
-        if (this.use_class == use_class)
-            return;
-
         this.use_class = use_class;
-
-        // Editor for class model needs update, runtime doesn't
-        final DisplayModel model = getWidget().checkDisplayModel();
-        if (model != null  &&  model.isClassModel())
-            firePropertyChange(null, null);
     }
 
     /** @return Is value of this property following