README.md

@@ -73,7 +73,7 @@ The `visionforge-core` module also includes configuration editors for JS (in `js
 
 **Class diagram:**
 
-![](docs/resources/class-diag-core.png)
+![](docs/images/class-diag-core.png)
 
 
 ### visionforge-solid
@@ -82,7 +82,7 @@ Includes common classes and serializers for 3D visualization, as well as Three.j
 
 **Class diagram:**
 
-![](docs/resources/class-diag-solid.png)
+![](docs/images/class-diag-solid.png)
 
 ##### Prototypes
 
@@ -127,7 +127,7 @@ Some shapes will also periodically change their color and visibility.
 
 **Example view:**
 
-![](docs/resources/spatial-showcase.png)
+![](docs/images/spatial-showcase.png)
 
 
 ### Full-Stack Application Example - Muon Monitor Visualization
@@ -139,7 +139,7 @@ A full-stack application example, showing the
 
 **Example view:**
 
-![](docs/resources/muon-monitor.png)
+![](docs/images/muon-monitor.png)
 
 
 ### GDML Example
@@ -150,7 +150,7 @@ Visualization example for geometry defined as GDML file.
 
 ##### Example view:
 
-![](docs/resources/gdml-demo.png)
+![](docs/images/gdml-demo.png)
 
 
 ## Thanks and references

demo/gdml/README.md

@@ -12,4 +12,4 @@ drag-and-drop GDML file to the window to see visualization. For an example file,
 
 ##### Example view:
 
-![](../../docs/resources/gdml-demo.png)
+![](../../docs/images/gdml-demo.png)

demo/muon-monitor/README.md

@@ -30,5 +30,5 @@ run `demo/muon-monitor/application/run` task.
 
 ##### Example view:
 
-![](../../docs/resources/muon-monitor.png)
+![](../../docs/images/muon-monitor.png)
 

demo/spatial-showcase/README.md

@@ -12,8 +12,8 @@ To see Java FX demo, run `demo/spatial-showcase/Tasks/application/run` Gradle ta
 
 ##### Example view for JS:
 
-![](../../docs/resources/spatial-showcase.png)
+![](../../docs/images/spatial-showcase.png)
 
 ##### Example view for Java FX:
 
-![](../../docs/resources/spatial-showcase-FX.png)
+![](../../docs/images/spatial-showcase-FX.png)

demo/spatial-showcase/src/jsMain/kotlin/hep/dataforge/vision/solid/demo/VariableBox.kt

@@ -5,6 +5,7 @@ import hep.dataforge.names.plus
 import hep.dataforge.names.startsWith
 import hep.dataforge.values.asValue
 import hep.dataforge.vision.getProperty
+import hep.dataforge.vision.onPropertyChange
 import hep.dataforge.vision.set
 import hep.dataforge.vision.setProperty
 import hep.dataforge.vision.solid.*

visionforge-core/src/commonMain/kotlin/hep/dataforge/vision/StyleSheet.kt

@@ -5,14 +5,13 @@ import hep.dataforge.names.Name
 import hep.dataforge.names.NameToken
 import hep.dataforge.names.asName
 import hep.dataforge.names.plus
-import kotlinx.coroutines.launch
 
 /**
  * A container for styles
  */
 public inline class StyleSheet(private val owner: VisionGroup) {
 
-    private val styleNode get() = owner.getOwnProperty(STYLESHEET_KEY).node
+    private val styleNode get() = owner.ownProperties[STYLESHEET_KEY].node
 
     public val items: Map<NameToken, Meta>? get() = styleNode?.items?.mapValues { it.value.node ?: Meta.EMPTY }
 
@@ -55,9 +54,7 @@ internal fun Vision.styleChanged(key: String, oldStyle: Meta?, newStyle: Meta?)
         val tokens: Collection<Name> =
             ((oldStyle?.items?.keys ?: emptySet()) + (newStyle?.items?.keys ?: emptySet()))
                 .map { it.asName() }
-        parent?.scope?.launch {
+        tokens.forEach { parent?.invalidateProperty(it) }
-            tokens.forEach { parent?.notifyPropertyChanged(it) }
-        }
     }
     if (this is VisionGroup) {
         for (obj in this) {
@@ -71,7 +68,7 @@ internal fun Vision.styleChanged(key: String, oldStyle: Meta?, newStyle: Meta?)
  * List of names of styles applied to this object. Order matters. Not inherited.
  */
 public var Vision.styles: List<String>
-    get() = getOwnProperty(Vision.STYLE_KEY)?.stringList ?: emptyList()
+    get() = ownProperties[Vision.STYLE_KEY]?.stringList ?: emptyList()
     set(value) {
         setProperty(Vision.STYLE_KEY, value)
     }
@@ -86,7 +83,7 @@ public val VisionGroup.styleSheet: StyleSheet get() = StyleSheet(this)
  * Add style name to the list of styles to be resolved later. The style with given name does not necessary exist at the moment.
  */
 public fun Vision.useStyle(name: String) {
-    styles = (getOwnProperty(Vision.STYLE_KEY)?.stringList ?: emptyList()) + name
+    styles = (ownProperties[Vision.STYLE_KEY]?.stringList ?: emptyList()) + name
 }
 
 
@@ -94,7 +91,7 @@ public fun Vision.useStyle(name: String) {
  * Find a style with given name for given [Vision]. The style is not necessary applied to this [Vision].
  */
 public tailrec fun Vision.getStyle(name: String): Meta? =
-    getOwnProperty(StyleSheet.STYLESHEET_KEY + name).node ?: parent?.getStyle(name)
+    ownProperties[StyleSheet.STYLESHEET_KEY + name].node ?: parent?.getStyle(name)
 
 /**
  * Resolve an item in all style layers

visionforge-core/src/commonMain/kotlin/hep/dataforge/vision/Vision.kt

@@ -1,9 +1,6 @@
 package hep.dataforge.vision
 
-import hep.dataforge.meta.DFExperimental
+import hep.dataforge.meta.*
-import hep.dataforge.meta.Meta
-import hep.dataforge.meta.MetaItem
-import hep.dataforge.meta.MutableItemProvider
 import hep.dataforge.meta.descriptors.Described
 import hep.dataforge.meta.descriptors.NodeDescriptor
 import hep.dataforge.meta.descriptors.get
@@ -12,11 +9,10 @@ import hep.dataforge.names.Name
 import hep.dataforge.names.asName
 import hep.dataforge.names.toName
 import hep.dataforge.vision.Vision.Companion.TYPE
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.callbackFlow
+import kotlinx.coroutines.flow.launchIn
-import kotlinx.serialization.Transient
+import kotlinx.coroutines.flow.onEach
 
 /**
  * A root type for display hierarchy
@@ -27,26 +23,8 @@ public interface Vision : Described {
     /**
      * The parent object of this one. If null, this one is a root.
      */
-    @Transient
     public var parent: VisionGroup?
 
-    /**
-     * Properties belonging to this [Vision] potentially including artificial properties
-     */
-    @Transient
-    public val meta: Meta
-
-    /**
-     * A coroutine scope for asynchronous calls and locks
-     */
-    public val scope: CoroutineScope get() = parent?.scope ?: GlobalScope
-
-    /**
-     * A fast accessor method to get own property (no inheritance or styles).
-     * Should be equivalent to `getProperty(name,false,false,false)`.
-     */
-    public fun getOwnProperty(name: Name): MetaItem?
-
     /**
      * Get property.
      * @param inherit toggles parent node property lookup. Null means inference from descriptor. Default is false.
@@ -59,38 +37,32 @@ public interface Vision : Described {
         includeDefaults: Boolean = true,
     ): MetaItem?
 
+    /**
+     * Get an intrinsic property of this Vision excluding any inheritance or defaults. In most cases should be the same as
+     * `getProperty(name, false, false, false`.
+     */
+    public fun getOwnProperty(name: Name): MetaItem? = getProperty(
+        name,
+        inherit = false,
+        includeStyles = false,
+        includeDefaults = false
+    )
 
     /**
      * Set the property value
      */
     public fun setProperty(name: Name, item: MetaItem?, notify: Boolean = true)
 
-    /**
-     * Subscribe on property updates. The subscription is bound to the given [scope] and canceled when the scope is canceled
-     */
-    public fun onPropertyChange(scope: CoroutineScope, callback: suspend (Name) -> Unit)
-
     /**
      * Flow of property invalidation events. It does not contain property values after invalidation since it is not clear
      * if it should include inherited properties etc.
      */
-    @DFExperimental
-    @OptIn(ExperimentalCoroutinesApi::class)
     public val propertyChanges: Flow<Name>
-        get() = callbackFlow<Name> {
-            coroutineScope {
-                onPropertyChange(this) {
-                    send(it)
-                }
-                awaitClose { cancel() }
-            }
-        }
-
 
     /**
      * Notify all listeners that a property has been changed and should be invalidated
      */
-    public suspend fun notifyPropertyChanged(propertyName: Name): Unit
+    public fun invalidateProperty(propertyName: Name): Unit
 
     /**
      * Update this vision using a dif represented by [VisionChange].
@@ -107,12 +79,19 @@ public interface Vision : Described {
     }
 }
 
-public fun Vision.asyncNotifyPropertyChange(propertyName: Name) {
+/**
-    scope.launch {
+ * Root property node
-        notifyPropertyChanged(propertyName)
+ */
-    }
+public val Vision.meta: Meta get() = ownProperties[Name.EMPTY]?.node ?: Meta.EMPTY
+
+/**
+ * Subscribe on property updates. The subscription is bound to the given [scope] and canceled when the scope is canceled
+ */
+public fun Vision.onPropertyChange(scope: CoroutineScope, callback: suspend (Name) -> Unit) {
+    propertyChanges.onEach(callback).launchIn(scope)
 }
 
+
 /**
  * Own properties, excluding inheritance, styles and descriptor
  */
@@ -122,7 +101,6 @@ public val Vision.ownProperties: MutableItemProvider
         override fun setItem(name: Name, item: MetaItem?): Unit = setProperty(name, item)
     }
 
-
 /**
  * Convenient accessor for all properties of a vision.
  * @param inherit - inherit property value from the parent by default. If null, inheritance is inferred from descriptor

visionforge-core/src/commonMain/kotlin/hep/dataforge/vision/VisionBase.kt

@@ -11,10 +11,9 @@ import hep.dataforge.values.Null
 import hep.dataforge.values.ValueType
 import hep.dataforge.vision.Vision.Companion.STYLE_KEY
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.launch
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
@@ -32,13 +31,14 @@ internal data class PropertyListener(
  */
 @Serializable
 @SerialName("vision")
-public open class VisionBase(internal var properties: Config? = null) : Vision {
+public open class VisionBase(
+    internal var properties: Config? = null,
+    @Transient public val coroutineScope: CoroutineScope = GlobalScope,
+) : Vision {
 
     @Transient
     override var parent: VisionGroup? = null
 
-    override val meta: Meta get() = properties ?: Meta.EMPTY
-
     @Synchronized
     protected fun getOrCreateConfig(): Config {
         if (properties == null) {
@@ -51,8 +51,10 @@ public open class VisionBase(internal var properties: Config? = null) : Vision {
     /**
      * A fast accessor method to get own property (no inheritance or styles
      */
-    override fun getOwnProperty(name: Name): MetaItem? {
+    override fun getOwnProperty(name: Name): MetaItem? = if (name == Name.EMPTY) {
-        return properties?.getItem(name)
+        properties?.asMetaItem()
+    } else {
+        properties?.getItem(name)
     }
 
     override fun getProperty(
@@ -60,7 +62,10 @@ public open class VisionBase(internal var properties: Config? = null) : Vision {
         inherit: Boolean,
         includeStyles: Boolean,
         includeDefaults: Boolean,
-    ): MetaItem? = sequence {
+    ): MetaItem? = if (!inherit && !includeStyles && !includeDefaults) {
+        getOwnProperty(name)
+    } else {
+        sequence {
             yield(getOwnProperty(name))
             if (includeStyles) {
                 yieldAll(getStyleItems(name))
@@ -72,13 +77,12 @@ public open class VisionBase(internal var properties: Config? = null) : Vision {
                 yield(descriptor?.get(name)?.defaultItem())
             }
         }.merge()
+    }
 
     override fun setProperty(name: Name, item: MetaItem?, notify: Boolean) {
         getOrCreateConfig().setItem(name, item)
         if (notify) {
-            scope.launch {
+            invalidateProperty(name)
-                notifyPropertyChanged(name)
-            }
         }
     }
 
@@ -89,7 +93,7 @@ public open class VisionBase(internal var properties: Config? = null) : Vision {
             .flatMap { it.items.asSequence() }
             .distinctBy { it.key }
             .forEach {
-                notifyPropertyChanged(it.key.asName())
+                invalidateProperty(it.key.asName())
             }
     }
 
@@ -99,18 +103,17 @@ public open class VisionBase(internal var properties: Config? = null) : Vision {
     private val propertyInvalidationFlow: MutableSharedFlow<Name> = MutableSharedFlow()
 
     @DFExperimental
-    override val propertyChanges: Flow<Name> get() = propertyInvalidationFlow
+    override val propertyChanges: Flow<Name>
+        get() = propertyInvalidationFlow
 
-    override fun onPropertyChange(scope: CoroutineScope, callback: suspend (Name) -> Unit) {
+    override fun invalidateProperty(propertyName: Name) {
-        propertyInvalidationFlow.onEach(callback).launchIn(scope)
+        coroutineScope.launch {
-    }
-
-    override suspend fun notifyPropertyChanged(propertyName: Name) {
             if (propertyName == STYLE_KEY) {
                 updateStyles(styles)
             }
             propertyInvalidationFlow.emit(propertyName)
         }
+    }
 
     override fun update(change: VisionChange) {
         change.properties?.let {

visionforge-core/src/commonMain/kotlin/hep/dataforge/vision/VisionChange.kt

@@ -82,7 +82,7 @@ private fun CoroutineScope.collectChange(
 
     //Collect properties change
     source.onPropertyChange(this) { propertyName ->
-        val newItem = source.getOwnProperty(propertyName)
+        val newItem = source.ownProperties[propertyName]
         collector().propertyChanged(name, propertyName, newItem)
     }
 

visionforge-core/src/commonMain/kotlin/hep/dataforge/vision/VisionGroupBase.kt

@@ -31,10 +31,10 @@ public open class VisionGroupBase(
         }
     }
 
-    override suspend fun notifyPropertyChanged(propertyName: Name) {
+    override fun invalidateProperty(propertyName: Name) {
-        super.notifyPropertyChanged(propertyName)
+        super.invalidateProperty(propertyName)
         for (obj in this) {
-            obj.notifyPropertyChanged(propertyName)
+            obj.invalidateProperty(propertyName)
         }
     }
 
@@ -47,7 +47,7 @@ public open class VisionGroupBase(
      * Propagate children change event upwards
      */
     private fun childrenChanged(name: NameToken, before: Vision?, after: Vision?) {
-        scope.launch {
+        coroutineScope.launch {
             _structureChanges.emit(MutableVisionGroup.StructureChange(name, before, after))
         }
     }

visionforge-core/src/commonTest/kotlin/hep/dataforge/vision/html/HtmlTagTest.kt

@@ -4,6 +4,7 @@ import hep.dataforge.meta.DFExperimental
 import hep.dataforge.meta.set
 import hep.dataforge.vision.VisionBase
 import hep.dataforge.vision.configure
+import hep.dataforge.vision.meta
 import kotlinx.html.*
 import kotlinx.html.stream.createHTML
 import kotlin.test.Test

visionforge-fx/src/main/kotlin/hep/dataforge/vision/solid/FXReferenceFactory.kt

@@ -2,6 +2,7 @@ package hep.dataforge.vision.solid
 
 import hep.dataforge.names.*
 import hep.dataforge.vision.Vision
+import hep.dataforge.vision.onPropertyChange
 import javafx.scene.Group
 import javafx.scene.Node
 import kotlin.reflect.KClass

visionforge-fx/src/main/kotlin/hep/dataforge/vision/solid/VisualObjectFXBinding.kt

@@ -4,15 +4,18 @@ import hep.dataforge.meta.*
 import hep.dataforge.names.Name
 import hep.dataforge.names.startsWith
 import hep.dataforge.names.toName
+import hep.dataforge.values.Value
 import hep.dataforge.vision.Vision
+import hep.dataforge.vision.onPropertyChange
 import javafx.application.Platform
+import javafx.beans.binding.Binding
 import javafx.beans.binding.ObjectBinding
 import tornadofx.*
 
 /**
  * A caching binding collection for [Vision] properties
  */
-class VisualObjectFXBinding(val fx: FX3DPlugin, val obj: Vision) {
+public class VisualObjectFXBinding(public val fx: FX3DPlugin, public val obj: Vision) {
     private val bindings = HashMap<Name, ObjectBinding<MetaItem?>>()
 
     init {
@@ -31,7 +34,7 @@ class VisualObjectFXBinding(val fx: FX3DPlugin, val obj: Vision) {
         }
     }
 
-    operator fun get(key: Name): ObjectBinding<MetaItem?> {
+    public operator fun get(key: Name): ObjectBinding<MetaItem?> {
         return bindings.getOrPut(key) {
             object : ObjectBinding<MetaItem?>() {
                 override fun computeValue(): MetaItem? = obj.getProperty(key)
@@ -39,10 +42,10 @@ class VisualObjectFXBinding(val fx: FX3DPlugin, val obj: Vision) {
         }
     }
 
-    operator fun get(key: String) = get(key.toName())
+    public operator fun get(key: String) = get(key.toName())
 }
 
-fun ObjectBinding<MetaItem?>.value() = objectBinding { it.value }
+public fun ObjectBinding<MetaItem?>.value(): Binding<Value?> = objectBinding { it.value }
 fun ObjectBinding<MetaItem?>.string() = stringBinding { it.string }
 fun ObjectBinding<MetaItem?>.number() = objectBinding { it.number }
 fun ObjectBinding<MetaItem?>.double() = objectBinding { it.double }

visionforge-gdml/src/commonMain/kotlin/hep/dataforge/vision/gdml/GdmlOptimizer.kt

@@ -3,6 +3,7 @@ package hep.dataforge.vision.gdml
 import hep.dataforge.meta.DFExperimental
 import hep.dataforge.meta.itemSequence
 import hep.dataforge.vision.Vision
+import hep.dataforge.vision.meta
 import hep.dataforge.vision.solid.*
 
 public expect class Counter() {

visionforge-solid/src/commonMain/kotlin/hep/dataforge/vision/solid/Solid.kt

@@ -152,21 +152,21 @@ public var Solid.x: Number
     get() = position?.x ?: 0f
     set(value) {
         position().x = value.toDouble()
-        asyncNotifyPropertyChange(Solid.X_POSITION_KEY)
+        invalidateProperty(Solid.X_POSITION_KEY)
     }
 
 public var Solid.y: Number
     get() = position?.y ?: 0f
     set(value) {
         position().y = value.toDouble()
-        asyncNotifyPropertyChange(Solid.Y_POSITION_KEY)
+        invalidateProperty(Solid.Y_POSITION_KEY)
     }
 
 public var Solid.z: Number
     get() = position?.z ?: 0f
     set(value) {
         position().z = value.toDouble()
-        asyncNotifyPropertyChange(Solid.Z_POSITION_KEY)
+        invalidateProperty(Solid.Z_POSITION_KEY)
     }
 
 private fun Solid.rotation(): Point3D =
@@ -176,21 +176,21 @@ public var Solid.rotationX: Number
     get() = rotation?.x ?: 0f
     set(value) {
         rotation().x = value.toDouble()
-        asyncNotifyPropertyChange(Solid.X_ROTATION_KEY)
+        invalidateProperty(Solid.X_ROTATION_KEY)
     }
 
 public var Solid.rotationY: Number
     get() = rotation?.y ?: 0f
     set(value) {
         rotation().y = value.toDouble()
-        asyncNotifyPropertyChange(Solid.Y_ROTATION_KEY)
+        invalidateProperty(Solid.Y_ROTATION_KEY)
     }
 
 public var Solid.rotationZ: Number
     get() = rotation?.z ?: 0f
     set(value) {
         rotation().z = value.toDouble()
-        asyncNotifyPropertyChange(Solid.Z_ROTATION_KEY)
+        invalidateProperty(Solid.Z_ROTATION_KEY)
     }
 
 private fun Solid.scale(): Point3D =
@@ -200,19 +200,19 @@ public var Solid.scaleX: Number
     get() = scale?.x ?: 1f
     set(value) {
         scale().x = value.toDouble()
-        asyncNotifyPropertyChange(Solid.X_SCALE_KEY)
+        invalidateProperty(Solid.X_SCALE_KEY)
     }
 
 public var Solid.scaleY: Number
     get() = scale?.y ?: 1f
     set(value) {
         scale().y = value.toDouble()
-        asyncNotifyPropertyChange(Solid.Y_SCALE_KEY)
+        invalidateProperty(Solid.Y_SCALE_KEY)
     }
 
 public var Solid.scaleZ: Number
     get() = scale?.z ?: 1f
     set(value) {
         scale().z = value.toDouble()
-        asyncNotifyPropertyChange(Solid.Z_SCALE_KEY)
+        invalidateProperty(Solid.Z_SCALE_KEY)
     }

visionforge-solid/src/commonMain/kotlin/hep/dataforge/vision/solid/SolidGroup.kt

@@ -107,8 +107,6 @@ internal class Prototypes(
         }
     }
 
-    override fun getOwnProperty(name: Name): MetaItem? = null
-
     override fun getProperty(
         name: Name,
         inherit: Boolean,

visionforge-solid/src/commonMain/kotlin/hep/dataforge/vision/solid/SolidReference.kt

@@ -3,9 +3,9 @@ package hep.dataforge.vision.solid
 import hep.dataforge.meta.*
 import hep.dataforge.meta.descriptors.NodeDescriptor
 import hep.dataforge.names.*
-import hep.dataforge.values.Null
 import hep.dataforge.vision.*
-import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.mapNotNull
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 
@@ -18,8 +18,7 @@ private fun SolidReference.getRefProperty(
     inherit: Boolean,
     includeStyles: Boolean,
     includeDefaults: Boolean,
-): MetaItem? {
+): MetaItem? = sequence {
-    return sequence {
     yield(getOwnProperty(name))
     if (includeStyles) {
         yieldAll(getStyleItems(name))
@@ -29,7 +28,6 @@ private fun SolidReference.getRefProperty(
         yield(parent?.getProperty(name, inherit))
     }
 }.merge()
-}
 
 /**
  * A reference [Solid] to reuse a template object
@@ -100,8 +98,6 @@ public class SolidReferenceGroup(
                     ReferenceChild(childName + key.asName())
                 } ?: emptyMap()
 
-        override val meta: Meta get() = TODO()// getChildProperty(childName, Name.EMPTY).node ?: Meta.EMPTY
-
         override fun getOwnProperty(name: Name): MetaItem? = getChildProperty(childName, name)
 
         override fun setProperty(name: Name, item: MetaItem?, notify: Boolean) {
@@ -113,7 +109,11 @@ public class SolidReferenceGroup(
             inherit: Boolean,
             includeStyles: Boolean,
             includeDefaults: Boolean,
-        ): MetaItem? = getRefProperty(name, inherit, includeStyles, includeDefaults)
+        ): MetaItem? = if (!inherit && !includeStyles && !includeDefaults) {
+            getOwnProperty(name)
+        } else {
+            getRefProperty(name, inherit, includeStyles, includeDefaults)
+        }
 
         override var parent: VisionGroup?
             get() {
@@ -124,16 +124,18 @@ public class SolidReferenceGroup(
                 error("Setting a parent for a reference child is not possible")
             }
 
-        override fun onPropertyChange(scope: CoroutineScope, callback: suspend (Name) -> Unit) {
+        @DFExperimental
-            this@SolidReferenceGroup.onPropertyChange(scope) { name ->
+        override val propertyChanges: Flow<Name>
+            get() = this@SolidReferenceGroup.propertyChanges.mapNotNull { name ->
                 if (name.startsWith(childToken(childName))) {
-                    callback(name.cutFirst())
+                    name.cutFirst()
-                }
+                } else {
+                    null
                 }
             }
 
-        override suspend fun notifyPropertyChanged(propertyName: Name) {
+        override fun invalidateProperty(propertyName: Name) {
-            this@SolidReferenceGroup.notifyPropertyChanged(childPropertyName(childName, propertyName))
+            this@SolidReferenceGroup.invalidateProperty(childPropertyName(childName, propertyName))
         }
 
         override fun update(change: VisionChange) {

visionforge-solid/src/commonTest/kotlin/hep/dataforge/vision/solid/SerializationTest.kt

@@ -4,6 +4,7 @@ import hep.dataforge.names.Name
 import hep.dataforge.names.toName
 import hep.dataforge.vision.MutableVisionGroup
 import hep.dataforge.vision.get
+import hep.dataforge.vision.meta
 import kotlin.test.Test
 import kotlin.test.assertEquals
 

visionforge-solid/src/commonTest/kotlin/hep/dataforge/vision/solid/SolidReferenceTest.kt

@@ -2,19 +2,18 @@ package hep.dataforge.vision.solid
 
 import hep.dataforge.vision.get
 import hep.dataforge.vision.style
-import hep.dataforge.vision.styles
 import hep.dataforge.vision.useStyle
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
 class SolidReferenceTest {
     val groupWithReference = SolidGroup {
-        val referenceStyle by style {
+        val theStyle by style {
             SolidMaterial.MATERIAL_COLOR_KEY put "red"
         }
         ref("test", Box(100f,100f,100f).apply {
             color("blue")
-            useStyle(referenceStyle)
+            useStyle(theStyle)
         })
     }
 

visionforge-threejs/src/main/kotlin/hep/dataforge/vision/solid/three/MeshThreeFactory.kt

@@ -6,6 +6,7 @@ import hep.dataforge.names.Name
 import hep.dataforge.names.asName
 import hep.dataforge.names.plus
 import hep.dataforge.names.startsWith
+import hep.dataforge.vision.onPropertyChange
 import hep.dataforge.vision.solid.Solid
 import hep.dataforge.vision.solid.SolidMaterial
 import hep.dataforge.vision.solid.layer

visionforge-threejs/src/main/kotlin/hep/dataforge/vision/solid/three/ThreeLabelFactory.kt

@@ -2,6 +2,7 @@ package hep.dataforge.vision.solid.three
 
 
 import hep.dataforge.context.logger
+import hep.dataforge.vision.onPropertyChange
 import hep.dataforge.vision.solid.SolidLabel
 import info.laht.threekt.core.Object3D
 import info.laht.threekt.geometries.TextBufferGeometry

visionforge-threejs/src/main/kotlin/hep/dataforge/vision/solid/three/ThreeLineFactory.kt

@@ -1,6 +1,7 @@
 package hep.dataforge.vision.solid.three
 
 import hep.dataforge.meta.node
+import hep.dataforge.vision.onPropertyChange
 import hep.dataforge.vision.solid.PolyLine
 import hep.dataforge.vision.solid.color
 import hep.dataforge.vision.solid.string

visionforge-threejs/src/main/kotlin/hep/dataforge/vision/solid/three/ThreeMaterials.kt

@@ -7,6 +7,7 @@ import hep.dataforge.values.int
 import hep.dataforge.values.string
 import hep.dataforge.vision.Colors
 import hep.dataforge.vision.Vision
+import hep.dataforge.vision.ownProperties
 import hep.dataforge.vision.solid.SolidMaterial
 import info.laht.threekt.materials.LineBasicMaterial
 import info.laht.threekt.materials.Material
@@ -119,7 +120,7 @@ private var Material.cached: Boolean
 
 public fun Mesh.updateMaterial(vision: Vision) {
     //val meta = vision.getProperty(SolidMaterial.MATERIAL_KEY, inherit = true).node
-    val ownMaterialMeta = vision.getOwnProperty(SolidMaterial.MATERIAL_KEY)
+    val ownMaterialMeta = vision.ownProperties[SolidMaterial.MATERIAL_KEY]
     val parentMaterialMeta = vision.parent?.getProperty(
         SolidMaterial.MATERIAL_KEY,
         inherit = true,

visionforge-threejs/src/main/kotlin/hep/dataforge/vision/solid/three/ThreePlugin.kt

@@ -6,6 +6,7 @@ import hep.dataforge.names.*
 import hep.dataforge.vision.Vision
 import hep.dataforge.vision.VisionForge
 import hep.dataforge.vision.client.ElementVisionRenderer
+import hep.dataforge.vision.onPropertyChange
 import hep.dataforge.vision.solid.*
 import hep.dataforge.vision.solid.specifications.Canvas3DOptions
 import hep.dataforge.vision.visible

visionforge-threejs/src/main/kotlin/hep/dataforge/vision/solid/three/ThreeReferenceFactory.kt

@@ -3,6 +3,7 @@ package hep.dataforge.vision.solid.three
 import hep.dataforge.names.cutFirst
 import hep.dataforge.names.firstOrNull
 import hep.dataforge.names.toName
+import hep.dataforge.vision.onPropertyChange
 import hep.dataforge.vision.solid.Solid
 import hep.dataforge.vision.solid.SolidReferenceGroup
 import hep.dataforge.vision.solid.SolidReferenceGroup.Companion.REFERENCE_CHILD_PROPERTY_PREFIX