Properties for cached objects inside proxies (not tested)

dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/AbstractVisualGroup.kt

@@ -28,31 +28,31 @@ abstract class AbstractVisualGroup : AbstractVisualObject(), VisualGroup {
         }
     }
 
-    private data class Listener(val owner: Any?, val callback: (Name, VisualObject?) -> Unit)
+    private data class StructureChangeListeners(val owner: Any?, val callback: (Name, VisualObject?) -> Unit)
 
     @Transient
-    private val listeners = HashSet<Listener>()
+    private val structureChangeListeners = HashSet<StructureChangeListeners>()
 
     /**
      * Add listener for children change
      */
     override fun onChildrenChange(owner: Any?, action: (Name, VisualObject?) -> Unit) {
-        listeners.add(Listener(owner, action))
+        structureChangeListeners.add(StructureChangeListeners(owner, action))
     }
 
     /**
      * Remove children change listener
      */
     override fun removeChildrenChangeListener(owner: Any?) {
-        listeners.removeAll { it.owner === owner }
+        structureChangeListeners.removeAll { it.owner === owner }
     }
 
-//    /**
+    /**
-//     * Propagate children change event upwards
+     * Propagate children change event upwards
-//     */
+     */
-//    protected fun childrenChanged(name: Name, child: VisualObject?) {
+    protected fun childrenChanged(name: Name, child: VisualObject?) {
-//
+        structureChangeListeners.forEach { it.callback(name, child) }
-//    }
+    }
 
     /**
      * Remove a child with given name token
@@ -62,7 +62,7 @@ abstract class AbstractVisualGroup : AbstractVisualObject(), VisualGroup {
     /**
      * Add, remove or replace child with given name
      */
-    protected abstract fun setChild(token: NameToken, child: VisualObject?)
+    protected abstract fun setChild(token: NameToken, child: VisualObject)
 
     /**
      * Add a static child. Statics could not be found by name, removed or replaced
@@ -99,7 +99,7 @@ abstract class AbstractVisualGroup : AbstractVisualObject(), VisualGroup {
                 parent[name.last()!!.asName()] = child
             }
         }
-        listeners.forEach { it.callback(name, child) }
+        structureChangeListeners.forEach { it.callback(name, child) }
     }
 
     operator fun set(key: String, child: VisualObject?) = if (key.isBlank()) {

dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/AbstractVisualObject.kt

@@ -2,6 +2,7 @@ package hep.dataforge.vis.common
 
 import hep.dataforge.meta.*
 import hep.dataforge.names.Name
+import hep.dataforge.names.asName
 import kotlinx.serialization.Transient
 
 internal data class PropertyListener(
@@ -14,6 +15,19 @@ abstract class AbstractVisualObject : VisualObject {
     @Transient
     override var parent: VisualObject? = null
 
+    override var style: Meta? = null
+        set(value) {
+            //notify about style removed
+            style?.items?.forEach {(name, value) ->
+                propertyChanged(name.asName(), value, null)
+            }
+            field = value
+            //notify about style adition
+            value?.items?.forEach { (name, value) ->
+                propertyChanged(name.asName(), null, value)
+            }
+        }
+
     @Transient
     private val listeners = HashSet<PropertyListener>()
 
@@ -31,7 +45,8 @@ abstract class AbstractVisualObject : VisualObject {
         listeners.removeAll { it.owner == owner }
     }
 
-    abstract var properties: Config?
+    protected abstract var properties: Config?
+
     override val config: Config
         get() = properties ?: Config().also { config ->
             properties = config.apply { onChange(this, ::propertyChanged) }
@@ -43,9 +58,9 @@ abstract class AbstractVisualObject : VisualObject {
 
     override fun getProperty(name: Name, inherit: Boolean): MetaItem<*>? {
         return if (inherit) {
-            properties?.get(name) ?: parent?.getProperty(name, inherit)
+            style?.get(name) ?: properties?.get(name) ?: parent?.getProperty(name, inherit)
         } else {
-            properties?.get(name)
+            style?.get(name) ?: properties?.get(name)
         }
     }
 

dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/VisualObject.kt

@@ -21,6 +21,11 @@ interface VisualObject : MetaRepr, Configurable {
     @Transient
     var parent: VisualObject?
 
+    /**
+     * A style which is set externally and could not be modified from inside
+     */
+    var style: Meta?
+
     /**
      * Set property for this object
      */

dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/Proxy.kt

@@ -1,4 +1,4 @@
-@file:UseSerializers(Point3DSerializer::class, NameSerializer::class)
+@file:UseSerializers(Point3DSerializer::class, NameSerializer::class, ConfigSerializer::class)
 
 package hep.dataforge.vis.spatial
 
@@ -8,15 +8,20 @@ import hep.dataforge.meta.Config
 import hep.dataforge.meta.MetaBuilder
 import hep.dataforge.meta.MetaItem
 import hep.dataforge.names.Name
+import hep.dataforge.names.NameToken
+import hep.dataforge.names.asName
 import hep.dataforge.vis.common.AbstractVisualObject
+import hep.dataforge.vis.common.VisualGroup
+import hep.dataforge.vis.common.VisualObject
 import kotlinx.serialization.Serializable
+import kotlinx.serialization.Transient
 import kotlinx.serialization.UseSerializers
 
 /**
  * A proxy [VisualObject3D] to reuse a template object
  */
 @Serializable
-class Proxy(val templateName: Name) : AbstractVisualObject(), VisualObject3D {
+class Proxy(val templateName: Name) : AbstractVisualObject(), VisualGroup, VisualObject3D {
 
     override var position: Point3D? = null
     override var rotation: Point3D? = null
@@ -28,10 +33,10 @@ class Proxy(val templateName: Name) : AbstractVisualObject(), VisualObject3D {
     /**
      * Recursively search for defined template in the parent
      */
-    val template: VisualObject3D
+    val template: VisualObject3D by lazy {
-        get() = (parent as? VisualGroup3D)?.getTemplate(templateName)
+        (parent as? VisualGroup3D)?.getTemplate(templateName)
             ?: error("Template with name $templateName not found in $parent")
-
+    }
 
     override fun getProperty(name: Name, inherit: Boolean): MetaItem<*>? {
         return if (inherit) {
@@ -45,16 +50,58 @@ class Proxy(val templateName: Name) : AbstractVisualObject(), VisualObject3D {
         //TODO add reference to child
         updatePosition()
     }
+
+    override val children: Map<NameToken, ProxyChild>
+        get() = (template as? VisualGroup)?.children?.mapValues {
+            ProxyChild(it.key.asName())
+        } ?: emptyMap()
+
+    private data class ProxyChangeListeners(val owner: Any?, val callback: (Name, VisualObject?) -> Unit)
+
+    @Transient
+    private val listeners = HashSet<ProxyChangeListeners>()
+
+    override fun onChildrenChange(owner: Any?, action: (Name, VisualObject?) -> Unit) {
+        listeners.add(ProxyChangeListeners(owner, action))
     }
 
-//fun VisualGroup3D.proxy(
+    override fun removeChildrenChangeListener(owner: Any?) {
-//    templateName: Name,
+        listeners.removeAll { it.owner == owner }
-//    //name: String? = null,
+    }
-//    builder: VisualGroup3D.() -> Unit
+
-//): Proxy {
+    override fun set(name: Name, child: VisualObject?) {
-//    val template = getTemplate(templateName) ?: templates.builder()
+        error("Content change not supported for proxy")
-//    return Proxy(this, templateName).also { set(name, it) }
+    }
-//}
+
+    private val propertyCache: HashMap<Name, Config> = HashMap()
+
+    private fun Config.attachListener(obj: VisualObject) {
+        onChange(this@Proxy) { name, before, after ->
+            listeners.forEach { listener ->
+                listener.callback(name, obj)
+            }
+        }
+    }
+
+    inner class ProxyChild(val name: Name) : AbstractVisualObject() {
+        override var properties: Config?
+            get() = propertyCache.getOrPut(name) {
+                Config().apply {
+                    attachListener(this@ProxyChild)
+                }
+            }
+            set(value) {
+                if (value == null) {
+                    propertyCache.remove(name)?.removeListener(this@Proxy)
+                } else {
+                    propertyCache[name] = value.apply {
+                        attachListener(this@ProxyChild)
+                    }
+                }
+            }
+
+    }
+}
 
 inline fun VisualGroup3D.ref(
     templateName: Name,

dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualGroup3D.kt

@@ -1,9 +1,9 @@
 @file:UseSerializers(Point3DSerializer::class, ConfigSerializer::class, NameTokenSerializer::class)
+
 package hep.dataforge.vis.spatial
 
 import hep.dataforge.io.ConfigSerializer
 import hep.dataforge.meta.Config
-import hep.dataforge.meta.Configurable
 import hep.dataforge.meta.MetaBuilder
 import hep.dataforge.meta.set
 import hep.dataforge.names.Name
@@ -16,7 +16,7 @@ import kotlinx.serialization.Serializable
 import kotlinx.serialization.UseSerializers
 
 @Serializable
-class VisualGroup3D : AbstractVisualGroup(), VisualObject3D, Configurable {
+class VisualGroup3D() : AbstractVisualGroup(), VisualObject3D {
     /**
      * A container for templates visible inside this group
      */
@@ -36,21 +36,26 @@ class VisualGroup3D : AbstractVisualGroup(), VisualObject3D, Configurable {
     private val _children = HashMap<NameToken, VisualObject>()
     override val children: Map<NameToken, VisualObject> get() = _children
 
-    override fun removeChild(token: NameToken) {
+    init {
-        _children.remove(token)
+        //Do after deserialization
+        _children.values.forEach {
+            it.parent = this
+        }
     }
 
-    override fun setChild(token: NameToken, child: VisualObject?) {
+    override fun removeChild(token: NameToken) {
-        if (child == null) {
         _children.remove(token)
-        } else {
+        childrenChanged(token.asName(), null)
+    }
+
+    override fun setChild(token: NameToken, child: VisualObject) {
         if (child.parent == null) {
             child.parent = this
         } else {
             error("Can't reassign existing parent for $child")
         }
         _children[token] = child
-        }
+        childrenChanged(token.asName(), child)
     }
 
     /**

dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualObject3D.kt

@@ -90,15 +90,15 @@ var VisualObject3D.detail: Int?
     get() = getProperty(DETAIL_KEY, false).int
     set(value) = setProperty(DETAIL_KEY, value)
 
-var VisualObject3D.material: Meta?
+var VisualObject.material: Meta?
     get() = getProperty(MATERIAL_KEY).node
     set(value) = setProperty(MATERIAL_KEY, value)
 
-var VisualObject3D.visible: Boolean?
+var VisualObject.visible: Boolean?
     get() = getProperty(VISIBLE_KEY).boolean
     set(value) = setProperty(VISIBLE_KEY, value)
 
-fun VisualObject3D.color(rgb: Int) {
+fun VisualObject.color(rgb: Int) {
     material = buildMeta { "color" to rgb }
 }
 

dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/ThreePlugin.kt

@@ -40,6 +40,7 @@ class ThreePlugin : AbstractPlugin() {
 
     fun buildObject3D(obj: VisualObject3D): Object3D {
         return when (obj) {
+            is Proxy -> proxyFactory(obj)
             is VisualGroup3D -> {
                 val group = info.laht.threekt.objects.Group()
                 obj.children.forEach { (name, child) ->
@@ -49,7 +50,6 @@ class ThreePlugin : AbstractPlugin() {
                             object3D.name = name.toString()
                             group.add(object3D)
                         } catch (ex: Throwable) {
-//                            console.error(ex)
                             logger.error(ex) { "Failed to render $name" }
                         }
                     }
@@ -61,7 +61,6 @@ class ThreePlugin : AbstractPlugin() {
                 }
             }
             is Composite -> compositeFactory(obj)
-            is Proxy -> proxyFactory(obj)
             else -> {
                 //find specialized factory for this type if it is present
                 val factory = findObjectFactory(obj::class)

dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/ThreeProxyFactory.kt

@@ -1,14 +1,23 @@
 package hep.dataforge.vis.spatial.three
 
+import hep.dataforge.vis.common.VisualObject
 import hep.dataforge.vis.spatial.Proxy
 import hep.dataforge.vis.spatial.VisualObject3D
+import hep.dataforge.vis.spatial.material
+import hep.dataforge.vis.spatial.visible
 import info.laht.threekt.core.Object3D
+import info.laht.threekt.objects.Mesh
 
 class ThreeProxyFactory(val three: ThreePlugin) : ThreeFactory<Proxy> {
     private val cache = HashMap<VisualObject3D, Object3D>()
 
     override val type = Proxy::class
 
+    private fun Mesh.updateProperties(obj: VisualObject?) {
+        material = obj?.material.jsMaterial()
+        visible = obj?.visible ?: true
+    }
+
     override fun invoke(obj: Proxy): Object3D {
         val template = obj.template
         val cachedObject = cache.getOrPut(template) {
@@ -16,9 +25,13 @@ class ThreeProxyFactory(val three: ThreePlugin) : ThreeFactory<Proxy> {
         }
 
         //val mesh = Mesh(templateMesh.geometry as BufferGeometry, templateMesh.material)
-        val mesh = cachedObject.clone()
+        val object3D = cachedObject.clone()
+        object3D.updatePosition(obj)
 
-        mesh.updatePosition(obj)
+        obj.onChildrenChange(object3D) { name, propertyHolder ->
-        return mesh
+            (object3D.findChild(name) as? Mesh)?.updateProperties(propertyHolder)
+        }
+
+        return object3D
     }
 }