demo/sat-demo/src/main/kotlin/ru/mipt/npm/sat/satServer.kt

@@ -42,7 +42,7 @@ fun main() {
             val targetVision = sat[target] as Solid
             targetVision.color("red")
             delay(300)
-            targetVision.color("green")
+            targetVision.color("darkgreen")
             delay(10)
         }
     }

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

@@ -16,8 +16,6 @@ import info.laht.threekt.core.BufferGeometry
 import info.laht.threekt.core.Object3D
 import info.laht.threekt.geometries.BoxBufferGeometry
 import info.laht.threekt.objects.Mesh
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import kotlin.math.max
 
 internal fun SolidGroup.varBox(
@@ -62,7 +60,7 @@ internal class VariableBox(xSize: Number, ySize: Number, zSize: Number) : ThreeV
         mesh.scale.set(xSize, ySize, zSize)
 
         //add listener to object properties
-        propertyNameFlow.onEach { name ->
+        onPropertyChange(three.context) { name ->
             when {
                 name.startsWith(GEOMETRY_KEY) -> {
                     val newXSize = getProperty(X_SIZE_KEY, false).number?.toDouble() ?: 1.0
@@ -78,7 +76,8 @@ internal class VariableBox(xSize: Number, ySize: Number, zSize: Number) : ThreeV
                 }
                 else -> mesh.updateProperty(this@VariableBox, name)
             }
-        }.launchIn(three.context)
+        }
+
         return mesh
     }
 

ui/bootstrap/src/main/kotlin/hep/dataforge/vision/bootstrap/visionPropertyEditor.kt

@@ -13,11 +13,12 @@ public fun RBuilder.visionPropertyEditor(
     descriptor: NodeDescriptor? = vision.descriptor,
     key: Any? = null,
 ) {
+
     card("Properties") {
         propertyEditor(
             provider = vision.ownProperties,
             defaultProvider = vision.allProperties(),
-            updateFlow = vision.propertyNameFlow,
+            updateFlow = vision.propertyChanges,
             descriptor = descriptor,
             key = key)
     }

ui/react/src/main/kotlin/hep/dataforge/vision/react/PropertyEditor.kt

@@ -7,6 +7,7 @@ import hep.dataforge.names.NameToken
 import hep.dataforge.names.lastOrNull
 import hep.dataforge.names.plus
 import hep.dataforge.values.Value
+import hep.dataforge.vision.hidden
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.channels.awaitClose
@@ -66,6 +67,9 @@ private fun RBuilder.propertyEditorItem(props: PropertyEditorProps) {
     val itemName by useState { props.name ?: Name.EMPTY }
     var item: MetaItem<*>? by useState { props.provider.getItem(itemName) }
     val descriptorItem: ItemDescriptor? = props.descriptor?.get(itemName)
+
+    if(descriptorItem?.hidden == true) return //fail fast for hidden property
+
     var actualItem: MetaItem<Meta>? by useState {
         item ?: props.defaultProvider?.getItem(itemName) ?: descriptorItem?.defaultItem()
     }
@@ -106,8 +110,6 @@ private fun RBuilder.propertyEditorItem(props: PropertyEditorProps) {
         update()
     }
 
-
-
     if (actualItem is MetaItem.NodeItem) {
         styledDiv {
             css {

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

@@ -5,6 +5,7 @@ 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
@@ -54,8 +55,10 @@ 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?.notifyPropertyChanged(it) }
         }
+    }
     if (this is VisionGroup) {
         for (obj in this) {
             obj.styleChanged(key, oldStyle, newStyle)

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

@@ -9,9 +9,10 @@ import hep.dataforge.names.asName
 import hep.dataforge.names.toName
 import hep.dataforge.provider.Type
 import hep.dataforge.vision.Vision.Companion.TYPE
-import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.*
-import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.callbackFlow
 import kotlinx.serialization.Transient
 
 /**
@@ -29,7 +30,7 @@ public interface Vision : Described {
     /**
      * A coroutine scope for asynchronous calls and locks
      */
-    public val scope: CoroutineScope get() = parent?.scope?: GlobalScope
+    public val scope: CoroutineScope get() = parent?.scope ?: GlobalScope
 
     /**
      * A fast accessor method to get own property (no inheritance or styles).
@@ -55,17 +56,26 @@ public interface Vision : Described {
      */
     public fun setProperty(name: Name, item: MetaItem<*>?, notify: Boolean = true)
 
+    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.
      */
-    public val propertyNameFlow: Flow<Name>
+    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 fun notifyPropertyChanged(propertyName: Name): Unit
+    public suspend fun notifyPropertyChanged(propertyName: Name): Unit
 
     /**
      * Update this vision using external meta. Children are not updated.
@@ -82,6 +92,12 @@ public interface Vision : Described {
     }
 }
 
+public fun Vision.asyncNotifyPropertyChange(propertyName: Name){
+    scope.launch {
+        notifyPropertyChanged(propertyName)
+    }
+}
+
 /**
  * Own properties, excluding inheritance, styles and descriptor
  */

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

@@ -11,8 +11,11 @@ import hep.dataforge.names.Name
 import hep.dataforge.names.asName
 import hep.dataforge.values.ValueType
 import hep.dataforge.vision.Vision.Companion.STYLE_KEY
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
-import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.launch
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
@@ -44,10 +47,12 @@ public open class VisionBase : Vision {
             properties = newProperties
             newProperties.onChange(this) { name, oldItem, newItem ->
                 if (oldItem != newItem) {
+                    scope.launch {
                         notifyPropertyChanged(name)
                     }
                 }
             }
+        }
         return properties!!
     }
 
@@ -77,14 +82,16 @@ public open class VisionBase : Vision {
     @Synchronized
     override fun setProperty(name: Name, item: MetaItem<*>?, notify: Boolean) {
         getOrCreateConfig().setItem(name, item)
-        if(notify) {
+        if (notify) {
+            scope.launch {
                 notifyPropertyChanged(name)
             }
         }
+    }
 
     override val descriptor: NodeDescriptor? get() = null
 
-    private fun updateStyles(names: List<String>) {
+    private suspend fun updateStyles(names: List<String>) {
         names.mapNotNull { getStyle(it) }.asSequence()
             .flatMap { it.items.asSequence() }
             .distinctBy { it.key }
@@ -94,17 +101,19 @@ public open class VisionBase : Vision {
     }
 
     @Transient
-    private val _propertyInvalidationFlow: MutableSharedFlow<Name> = MutableSharedFlow()
+    private val propertyInvalidationFlow: MutableSharedFlow<Name> = MutableSharedFlow()
 
-    override val propertyNameFlow: SharedFlow<Name> get() = _propertyInvalidationFlow
+    override val propertyChanges: Flow<Name> get() = propertyInvalidationFlow
 
-    override fun notifyPropertyChanged(propertyName: Name) {
+    override fun onPropertyChange(scope: CoroutineScope, callback: suspend (Name) -> Unit) {
+        propertyInvalidationFlow.onEach(callback).launchIn(scope)
+    }
+
+    override suspend fun notifyPropertyChanged(propertyName: Name) {
         if (propertyName == STYLE_KEY) {
             updateStyles(styles)
         }
-        scope.launch {
+        propertyInvalidationFlow.emit(propertyName)
-            _propertyInvalidationFlow.emit(propertyName)
-        }
     }
 
     public fun configure(block: MutableMeta<*>.() -> Unit) {

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

@@ -67,6 +67,9 @@ public class VisionChange(
     @Serializable(MetaSerializer::class) public val properties: Meta? = null,
     public val children: Map<Name, VisionChange>? = null,
 ) {
+    init {
+        (vision as? VisionGroup)?.attachChildren()
+    }
 
 }
 
@@ -81,10 +84,10 @@ private fun CoroutineScope.collectChange(
 ) {
 
     //Collect properties change
-    source.propertyNameFlow.onEach { propertyName ->
+    source.onPropertyChange(this) { propertyName ->
         val newItem = source.getProperty(propertyName, inherit = false, includeStyles = false, includeDefaults = false)
         collector().propertyChanged(name, propertyName, newItem)
-    }.launchIn(this)
+    }
 
     if (source is VisionGroup) {
         //Subscribe for children changes

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

@@ -28,7 +28,7 @@ public open class VisionGroupBase : VisionBase(), MutableVisionGroup {
      */
     override val children: Map<NameToken, Vision> get() = childrenInternal
 
-    override fun notifyPropertyChanged(propertyName: Name) {
+    override suspend fun notifyPropertyChanged(propertyName: Name) {
         super.notifyPropertyChanged(propertyName)
         for (obj in this) {
             obj.notifyPropertyChanged(propertyName)

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

@@ -1,15 +1,11 @@
 package hep.dataforge.vision
 
 import hep.dataforge.meta.*
-import hep.dataforge.meta.descriptors.NodeDescriptor
-import hep.dataforge.names.Name
-import hep.dataforge.values.ValueType
 import hep.dataforge.values.asValue
 
 @DslMarker
 public annotation class VisionBuilder
 
-
 public fun Sequence<MetaItem<*>?>.merge(): MetaItem<*>? {
     return when (val first = firstOrNull { it != null }) {
         null -> null
@@ -22,14 +18,6 @@ public fun Sequence<MetaItem<*>?>.merge(): MetaItem<*>? {
     }
 }
 
-public inline fun <reified E : Enum<E>> NodeDescriptor.enum(key: Name, default: E?): Unit = value(key) {
-    type(ValueType.STRING)
-    default?.let {
-        default(default)
-    }
-    allowedValues = enumValues<E>().map { it.asValue() }
-}
-
 @DFExperimental
 public val Vision.properties: Config?
     get() = (this as? VisionBase)?.properties

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

@@ -1,27 +0,0 @@
-package hep.dataforge.vision
-
-import hep.dataforge.meta.*
-import hep.dataforge.meta.descriptors.ValueDescriptor
-import hep.dataforge.meta.descriptors.attributes
-
-/**
- * Extension property to access the "widget" key of [ValueDescriptor]
- */
-public var ValueDescriptor.widget: Meta
-    get() = attributes["widget"].node ?: Meta.EMPTY
-    set(value) {
-        attributes {
-            set("widget", value)
-        }
-    }
-
-/**
- * Extension property to access the "widget.type" key of [ValueDescriptor]
- */
-public var ValueDescriptor.widgetType: String?
-    get() = attributes["widget.type"].string
-    set(value) {
-        attributes{
-            set("widget.type", value)
-        }
-    }

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

@@ -1,11 +1,13 @@
 package hep.dataforge.vision
 
-import hep.dataforge.meta.Meta
+import hep.dataforge.meta.*
-import hep.dataforge.meta.boolean
 import hep.dataforge.meta.descriptors.ItemDescriptor
+import hep.dataforge.meta.descriptors.NodeDescriptor
+import hep.dataforge.meta.descriptors.ValueDescriptor
 import hep.dataforge.meta.descriptors.attributes
-import hep.dataforge.meta.get
+import hep.dataforge.names.Name
-import hep.dataforge.meta.set
+import hep.dataforge.values.ValueType
+import hep.dataforge.values.asValue
 
 private const val INHERITED_DESCRIPTOR_ATTRIBUTE = "inherited"
 private const val STYLE_DESCRIPTOR_ATTRIBUTE = "useStyles"
@@ -30,3 +32,48 @@ public val Vision.describedProperties: Meta
         }
     }
 
+/**
+ * Extension property to access the "widget" key of [ValueDescriptor]
+ */
+public var ValueDescriptor.widget: Meta
+    get() = attributes["widget"].node ?: Meta.EMPTY
+    set(value) {
+        attributes {
+            set("widget", value)
+        }
+    }
+
+/**
+ * Extension property to access the "widget.type" key of [ValueDescriptor]
+ */
+public var ValueDescriptor.widgetType: String?
+    get() = attributes["widget.type"].string
+    set(value) {
+        attributes {
+            set("widget.type", value)
+        }
+    }
+
+/**
+ * If true, this item is hidden in property editor. Default is false
+ */
+public val ItemDescriptor.hidden: Boolean
+    get() = attributes["widget.hide"].boolean ?: false
+
+public fun ItemDescriptor.hide(): Unit = attributes {
+    set("widget.hide", true)
+}
+
+
+public inline fun <reified E : Enum<E>> NodeDescriptor.enum(
+    key: Name,
+    default: E?,
+    crossinline modifier: ValueDescriptor.() -> Unit = {},
+): Unit = value(key) {
+    type(ValueType.STRING)
+    default?.let {
+        default(default)
+    }
+    allowedValues = enumValues<E>().map { it.asValue() }
+    modifier()
+}

visionforge-core/src/jsMain/kotlin/hep/dataforge/vision/client/VisionClient.kt

@@ -18,9 +18,6 @@ import org.w3c.dom.WebSocket
 import org.w3c.dom.asList
 import org.w3c.dom.get
 import org.w3c.dom.url.URL
-import kotlin.collections.HashMap
-import kotlin.collections.forEach
-import kotlin.collections.maxByOrNull
 import kotlin.collections.set
 import kotlin.reflect.KClass
 
@@ -84,15 +81,19 @@ public class VisionClient : AbstractPlugin() {
             renderVision(element, embeddedVision, outputMeta)
         }
 
+        element.attributes[OUTPUT_FETCH_ATTRIBUTE]?.let { attr ->
+
+            val fetchUrl = if (attr.value.isBlank() || attr.value == "auto") {
                 val endpoint = resolveEndpoint(element)
                 logger.info { "Vision server is resolved to $endpoint" }
-
+                URL(endpoint).apply {
-        element.attributes[OUTPUT_FETCH_ATTRIBUTE]?.let {
-
-            val fetchUrl = URL(endpoint).apply {
-                searchParams.append("name", name)
                     pathname += "/vision"
                 }
+            } else {
+                URL(attr.value)
+            }.apply {
+                searchParams.append("name", name)
+            }
 
             logger.info { "Fetching vision data from $fetchUrl" }
             window.fetch(fetchUrl).then { response ->
@@ -102,16 +103,22 @@ public class VisionClient : AbstractPlugin() {
                         renderVision(element, vision, outputMeta)
                     }
                 } else {
-                    logger.error { "Failed to fetch initial vision state from $endpoint" }
+                    logger.error { "Failed to fetch initial vision state from $fetchUrl" }
                 }
 
             }
         }
 
-        element.attributes[OUTPUT_CONNECT_ATTRIBUTE]?.let {
+        element.attributes[OUTPUT_CONNECT_ATTRIBUTE]?.let { attr ->
-
+            val wsUrl = if (attr.value.isBlank() || attr.value == "auto") {
-            val wsUrl = URL(endpoint).apply {
+                val endpoint = resolveEndpoint(element)
+                logger.info { "Vision server is resolved to $endpoint" }
+                URL(endpoint).apply {
                     pathname += "/ws"
+                }
+            } else {
+                URL(attr.value)
+            }.apply {
                 protocol = "ws"
                 searchParams.append("name", name)
             }
@@ -122,15 +129,20 @@ public class VisionClient : AbstractPlugin() {
                 onmessage = { messageEvent ->
                     val stringData: String? = messageEvent.data as? String
                     if (stringData != null) {
-                        val dif = visionManager.jsonFormat.decodeFromString(
+                        val change = visionManager.jsonFormat.decodeFromString(
                             VisionChange.serializer(),
                             stringData
                         )
-                        logger.debug { "Got update $dif for output with name $name" }
+
-                        visionMap[element]?.update(dif)
+                        if(change.vision!= null){
+                            renderVision(element, change.vision, outputMeta)
+                        }
+
+                        logger.debug { "Got update $change for output with name $name" }
+                        visionMap[element]?.update(change)
                             ?: console.info("Target vision for element $element with name $name not found")
                     } else {
-                        console.error ("WebSocket message data is not a string")
+                        console.error("WebSocket message data is not a string")
                     }
                 }
                 onopen = {

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

@@ -4,8 +4,6 @@ import hep.dataforge.names.*
 import hep.dataforge.vision.Vision
 import javafx.scene.Group
 import javafx.scene.Node
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import kotlin.reflect.KClass
 
 class FXReferenceFactory(val plugin: FX3DPlugin) : FX3DFactory<SolidReferenceGroup> {
@@ -15,7 +13,7 @@ class FXReferenceFactory(val plugin: FX3DPlugin) : FX3DFactory<SolidReferenceGro
         val prototype = obj.prototype
         val node = plugin.buildNode(prototype)
 
-        obj.propertyNameFlow.onEach { name->
+        obj.onPropertyChange(plugin.context) { name->
             if (name.firstOrNull()?.body == SolidReferenceGroup.REFERENCE_CHILD_PROPERTY_PREFIX) {
                 val childName = name.firstOrNull()?.index?.toName() ?: error("Wrong syntax for reference child property: '$name'")
                 val propertyName = name.cutFirst()
@@ -23,7 +21,7 @@ class FXReferenceFactory(val plugin: FX3DPlugin) : FX3DFactory<SolidReferenceGro
                 val child = node.findChild(childName) ?: error("Object child with name '$childName' not found")
                 child.updateProperty(referenceChild, propertyName)
             }
-        }.launchIn(plugin.context)
+        }
         return node
     }
 }

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

@@ -7,8 +7,6 @@ import hep.dataforge.names.toName
 import hep.dataforge.vision.Vision
 import javafx.application.Platform
 import javafx.beans.binding.ObjectBinding
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import tornadofx.*
 
 /**
@@ -18,7 +16,7 @@ class VisualObjectFXBinding(val fx: FX3DPlugin, val obj: Vision) {
     private val bindings = HashMap<Name, ObjectBinding<MetaItem<*>?>>()
 
     init {
-        obj.propertyNameFlow.onEach { name ->
+        obj.onPropertyChange(fx.context) { name ->
             bindings.filter { it.key.startsWith(name) }.forEach { entry ->
                 Platform.runLater {
                     entry.value.invalidate()
@@ -30,7 +28,7 @@ class VisualObjectFXBinding(val fx: FX3DPlugin, val obj: Vision) {
 //                bindings[currentName]?.invalidate()
 //                currentName = currentName.cutLast()
 //            }
-        }.launchIn(fx.context)
+        }
     }
 
     operator fun get(key: Name): ObjectBinding<MetaItem<*>?> {

visionforge-server/src/main/kotlin/hep/dataforge/vision/three/server/VisionServer.kt

@@ -41,6 +41,13 @@ import java.awt.Desktop
 import java.net.URI
 import kotlin.time.milliseconds
 
+public enum class VisionServerDataMode {
+    EMBED,
+    FETCH,
+    CONNECT
+}
+
+
 /**
  * A ktor plugin container with given [routing]
  */
@@ -52,6 +59,7 @@ public class VisionServer internal constructor(
     override val config: Config = Config()
     public var updateInterval: Long by config.long(300, key = UPDATE_INTERVAL_KEY)
     public var cacheFragments: Boolean by config.boolean(true)
+    public var dataMode: VisionServerDataMode = VisionServerDataMode.CONNECT
 
     /**
      * a list of headers that should be applied to all pages
@@ -72,10 +80,23 @@ public class VisionServer internal constructor(
         val consumer = object : VisionTagConsumer<Any?>(consumer) {
             override fun DIV.renderVision(name: Name, vision: Vision, outputMeta: Meta) {
                 visionMap[name] = vision
-
+                // Toggle update mode
-                // Toggle updates
+                when (dataMode) {
-                attributes[OUTPUT_FETCH_ATTRIBUTE] = "true"
+                    VisionServerDataMode.EMBED -> {
-                attributes[OUTPUT_CONNECT_ATTRIBUTE] = "true"
+                        script {
+                            attributes["class"] = OUTPUT_DATA_CLASS
+                            unsafe {
+                                +visionManager.encodeToString(vision)
+                            }
+                        }
+                    }
+                    VisionServerDataMode.FETCH -> {
+                        attributes[OUTPUT_FETCH_ATTRIBUTE] = "auto"
+                    }
+                    VisionServerDataMode.CONNECT -> {
+                        attributes[OUTPUT_CONNECT_ATTRIBUTE] = "auto"
+                    }
+                }
             }
         }
 
@@ -110,10 +131,19 @@ public class VisionServer internal constructor(
 
             application.log.debug("Opened server socket for $name")
             val vision: Vision = visions[name.toName()] ?: error("Plot with id='$name' not registered")
+
             try {
                 withContext(visionManager.context.coroutineContext) {
+
+                    val initialVision = VisionChange(vision = vision)
+                    val initialJson =  visionManager.jsonFormat.encodeToString(
+                        VisionChange.serializer(),
+                        initialVision
+                    )
+                    outgoing.send(Frame.Text(initialJson))
+
                     vision.flowChanges(visionManager, updateInterval.milliseconds).collect { update ->
-                        val json = VisionManager.defaultJson.encodeToString(
+                        val json = visionManager.jsonFormat.encodeToString(
                             VisionChange.serializer(),
                             update
                         )

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

@@ -61,6 +61,7 @@ public interface Solid : Vision {
         public val descriptor: NodeDescriptor by lazy {
             NodeDescriptor {
                 value(VISIBLE_KEY) {
+                    inherited = false
                     type(ValueType.BOOLEAN)
                     default(true)
                 }
@@ -69,11 +70,14 @@ public interface Solid : Vision {
                 value(Vision.STYLE_KEY) {
                     type(ValueType.STRING)
                     multiple = true
+                    hide()
                 }
 
                 item(SolidMaterial.MATERIAL_KEY.toString(), SolidMaterial.descriptor)
 
-                enum(ROTATION_ORDER_KEY, default = RotationOrder.XYZ)
+                enum(ROTATION_ORDER_KEY, default = RotationOrder.XYZ) {
+                    hide()
+                }
             }
         }
 
@@ -152,21 +156,21 @@ public var Solid.x: Number
     get() = position?.x ?: 0f
     set(value) {
         position().x = value.toDouble()
-        notifyPropertyChanged(Solid.X_POSITION_KEY)
+        asyncNotifyPropertyChange(Solid.X_POSITION_KEY)
     }
 
 public var Solid.y: Number
     get() = position?.y ?: 0f
     set(value) {
         position().y = value.toDouble()
-        notifyPropertyChanged(Solid.Y_POSITION_KEY)
+        asyncNotifyPropertyChange(Solid.Y_POSITION_KEY)
     }
 
 public var Solid.z: Number
     get() = position?.z ?: 0f
     set(value) {
         position().z = value.toDouble()
-        notifyPropertyChanged(Solid.Z_POSITION_KEY)
+        asyncNotifyPropertyChange(Solid.Z_POSITION_KEY)
     }
 
 private fun Solid.rotation(): Point3D =
@@ -176,21 +180,21 @@ public var Solid.rotationX: Number
     get() = rotation?.x ?: 0f
     set(value) {
         rotation().x = value.toDouble()
-        notifyPropertyChanged(Solid.X_ROTATION_KEY)
+        asyncNotifyPropertyChange(Solid.X_ROTATION_KEY)
     }
 
 public var Solid.rotationY: Number
     get() = rotation?.y ?: 0f
     set(value) {
         rotation().y = value.toDouble()
-        notifyPropertyChanged(Solid.Y_ROTATION_KEY)
+        asyncNotifyPropertyChange(Solid.Y_ROTATION_KEY)
     }
 
 public var Solid.rotationZ: Number
     get() = rotation?.z ?: 0f
     set(value) {
         rotation().z = value.toDouble()
-        notifyPropertyChanged(Solid.Z_ROTATION_KEY)
+        asyncNotifyPropertyChange(Solid.Z_ROTATION_KEY)
     }
 
 private fun Solid.scale(): Point3D =
@@ -200,19 +204,19 @@ public var Solid.scaleX: Number
     get() = scale?.x ?: 1f
     set(value) {
         scale().x = value.toDouble()
-        notifyPropertyChanged(Solid.X_SCALE_KEY)
+        asyncNotifyPropertyChange(Solid.X_SCALE_KEY)
     }
 
 public var Solid.scaleY: Number
     get() = scale?.y ?: 1f
     set(value) {
         scale().y = value.toDouble()
-        notifyPropertyChanged(Solid.Y_SCALE_KEY)
+        asyncNotifyPropertyChange(Solid.Y_SCALE_KEY)
     }
 
 public var Solid.scaleZ: Number
     get() = scale?.z ?: 1f
     set(value) {
         scale().z = value.toDouble()
-        notifyPropertyChanged(Solid.Z_SCALE_KEY)
+        asyncNotifyPropertyChange(Solid.Z_SCALE_KEY)
     }

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

@@ -42,7 +42,7 @@ public class SolidGroup : VisionGroupBase(), Solid, PrototypeHolder {
      * Ger a prototype redirecting the request to the parent if prototype is not found
      */
     override fun getPrototype(name: Name): Solid? =
-        prototypes?.get(name) as? Solid ?: (parent as? PrototypeHolder)?.getPrototype(name)
+        (prototypes?.get(name) as? Solid) ?: (parent as? PrototypeHolder)?.getPrototype(name)
 
     /**
      * Create or edit prototype node as a group
@@ -108,7 +108,7 @@ public fun VisionContainerBuilder<Vision>.group(name: String, action: SolidGroup
 @Serializable(Prototypes.Companion::class)
 internal class Prototypes(
     children: Map<NameToken, Vision> = emptyMap(),
-) : VisionGroupBase() {
+) : VisionGroupBase(), PrototypeHolder {
 
     init {
         childrenInternal.putAll(children)
@@ -155,4 +155,10 @@ internal class Prototypes(
             mapSerializer.serialize(encoder, value.children)
         }
     }
+
+    override fun prototypes(builder: VisionContainerBuilder<Solid>.() -> Unit) {
+        apply(builder)
+    }
+
+    override fun getPrototype(name: Name): Solid? = get(name) as? Solid
 }

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

@@ -89,18 +89,24 @@ public class SolidMaterial : Scheme() {
         public override val descriptor: NodeDescriptor by lazy {
             //must be lazy to avoid initialization bug
             NodeDescriptor {
+                inherited = true
+                usesStyles = true
+
                 value(COLOR_KEY) {
                     inherited = true
                     usesStyles = true
                     type(ValueType.STRING, ValueType.NUMBER)
                     widgetType = "color"
                 }
-//                value(SPECULAR_COLOR_KEY) {
+
-//                    inherited = true
+                value(SPECULAR_COLOR_KEY) {
-//                    usesStyles = true
+                    inherited = true
-//                    type(ValueType.STRING, ValueType.NUMBER)
+                    usesStyles = true
-//                    widgetType = "color"
+                    type(ValueType.STRING, ValueType.NUMBER)
-//                }
+                    widgetType = "color"
+                    hide()
+                }
+
                 value(OPACITY_KEY) {
                     inherited = true
                     usesStyles = true

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

@@ -5,9 +5,7 @@ import hep.dataforge.meta.descriptors.NodeDescriptor
 import hep.dataforge.meta.descriptors.get
 import hep.dataforge.names.*
 import hep.dataforge.vision.*
-import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.flow.filter
-import kotlinx.coroutines.flow.map
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 
@@ -128,14 +126,15 @@ public class SolidReferenceGroup(
                 error("Setting a parent for a reference child is not possible")
             }
 
-        override val propertyNameFlow: Flow<Name>
+        override fun onPropertyChange(scope: CoroutineScope, callback: suspend (Name) -> Unit) {
-            get() = this@SolidReferenceGroup.propertyNameFlow.filter { name ->
+            this@SolidReferenceGroup.onPropertyChange(scope) { name ->
-                name.startsWith(childToken(childName))
+                if (name.startsWith(childToken(childName))) {
-            }.map { name ->
+                    callback(name.cutFirst())
-                name.cutFirst()
+                }
+            }
         }
 
-        override fun notifyPropertyChanged(propertyName: Name) {
+        override suspend fun notifyPropertyChanged(propertyName: Name) {
             this@SolidReferenceGroup.notifyPropertyChanged(childPropertyName(childName, propertyName))
         }
 

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

@@ -15,8 +15,6 @@ import info.laht.threekt.geometries.EdgesGeometry
 import info.laht.threekt.geometries.WireframeGeometry
 import info.laht.threekt.objects.LineSegments
 import info.laht.threekt.objects.Mesh
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import kotlin.reflect.KClass
 
 /**
@@ -45,7 +43,7 @@ public abstract class MeshThreeFactory<in T : Solid>(
         }.applyProperties(obj)
 
         //add listener to object properties
-        obj.propertyNameFlow.onEach { name ->
+        obj.onPropertyChange(three.updateScope) { name ->
             when {
                 name.startsWith(Solid.GEOMETRY_KEY) -> {
                     val oldGeometry = mesh.geometry as BufferGeometry
@@ -59,7 +57,7 @@ public abstract class MeshThreeFactory<in T : Solid>(
                 name.startsWith(EDGES_KEY) -> mesh.applyEdges(obj)
                 else -> mesh.updateProperty(obj, name)
             }
-        }.launchIn(three.updateScope)
+        }
 
         return mesh
     }

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

@@ -47,7 +47,7 @@ public fun Object3D.updatePosition(obj: Vision) {
  */
 public fun Object3D.updateProperty(source: Vision, propertyName: Name) {
     if (this is Mesh && propertyName.startsWith(MATERIAL_KEY)) {
-        this.material = getMaterial(source, false)
+        this.material = getMaterial(source, true)
     } else if (
         propertyName.startsWith(Solid.POSITION_KEY)
         || propertyName.startsWith(Solid.ROTATION)

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

@@ -8,8 +8,6 @@ import info.laht.threekt.core.Object3D
 import info.laht.threekt.geometries.TextBufferGeometry
 import info.laht.threekt.objects.Mesh
 import kotlinext.js.jsObject
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import kotlin.reflect.KClass
 
 /**
@@ -27,10 +25,10 @@ public object ThreeLabelFactory : ThreeFactory<SolidLabel> {
         })
         return Mesh(textGeo, getMaterial(obj, true)).apply {
             updatePosition(obj)
-            obj.propertyNameFlow.onEach { _ ->
+            obj.onPropertyChange(three.updateScope){ _ ->
                 //TODO
                 three.logger.warn{"Label parameter change not implemented"}
-            }.launchIn(three.updateScope)
+            }
         }
     }
 }

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

@@ -9,8 +9,6 @@ import info.laht.threekt.core.Geometry
 import info.laht.threekt.core.Object3D
 import info.laht.threekt.math.Color
 import info.laht.threekt.objects.LineSegments
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import kotlin.reflect.KClass
 
 public object ThreeLineFactory : ThreeFactory<PolyLine> {
@@ -30,9 +28,9 @@ public object ThreeLineFactory : ThreeFactory<PolyLine> {
             updatePosition(obj)
             //layers.enable(obj.layer)
             //add listener to object properties
-            obj.propertyNameFlow.onEach { propertyName ->
+            obj.onPropertyChange(three.updateScope) { propertyName ->
                 updateProperty(obj, propertyName)
-            }.launchIn(three.updateScope)
+            }
         }
     }
 

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

@@ -59,6 +59,10 @@ public object ThreeMaterials {
             MeshPhongMaterial().apply {
                 color = meta[SolidMaterial.COLOR_KEY]?.getColor() ?: DEFAULT_COLOR
                 specular = meta[SolidMaterial.SPECULAR_COLOR_KEY]!!.getColor()
+                emissive = specular
+                reflectivity = 1.0
+                refractionRatio = 1.0
+                shininess = 100.0
                 opacity = meta[SolidMaterial.OPACITY_KEY]?.double ?: 1.0
                 transparent = opacity < 1.0
                 wireframe = meta[SolidMaterial.WIREFRAME_KEY].boolean ?: false

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

@@ -67,7 +67,7 @@ public class ThreePlugin : AbstractPlugin(), ElementVisionRenderer {
                 updatePosition(obj)
                 //obj.onChildrenChange()
 
-                obj.propertyNameFlow.onEach { name ->
+                obj.onPropertyChange(updateScope) { name ->
                     if (
                         name.startsWith(Solid.POSITION_KEY) ||
                         name.startsWith(Solid.ROTATION) ||
@@ -78,7 +78,7 @@ public class ThreePlugin : AbstractPlugin(), ElementVisionRenderer {
                     } else if (name == Vision.VISIBLE_KEY) {
                         visible = obj.visible ?: true
                     }
-                }.launchIn(updateScope)
+                }
 
                 obj.structureChanges.onEach { (nameToken, _, child) ->
 //                        if (name.isEmpty()) {

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

@@ -9,8 +9,6 @@ import hep.dataforge.vision.solid.SolidReferenceGroup.Companion.REFERENCE_CHILD_
 import info.laht.threekt.core.BufferGeometry
 import info.laht.threekt.core.Object3D
 import info.laht.threekt.objects.Mesh
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import kotlin.reflect.KClass
 
 public object ThreeReferenceFactory : ThreeFactory<SolidReferenceGroup> {
@@ -47,7 +45,7 @@ public object ThreeReferenceFactory : ThreeFactory<SolidReferenceGroup> {
 
         //TODO apply child properties
 
-        obj.propertyNameFlow.onEach { name->
+        obj.onPropertyChange(three.updateScope) { name->
             if (name.firstOrNull()?.body == REFERENCE_CHILD_PROPERTY_PREFIX) {
                 val childName = name.firstOrNull()?.index?.toName() ?: error("Wrong syntax for reference child property: '$name'")
                 val propertyName = name.cutFirst()
@@ -57,7 +55,7 @@ public object ThreeReferenceFactory : ThreeFactory<SolidReferenceGroup> {
             } else {
                 object3D.updateProperty(obj, name)
             }
-        }.launchIn(three.updateScope)
+        }
 
 
         return object3D