refactored randomization uss

com.unity.perception/Editor/Randomization/Editors/RunInUSimWindow.cs

 
         void CreateLinuxBuildAndZip()
         {
-            // Ensure that scenario serialization is enabled
-            var scenario = (ScenarioBase)m_ScenarioField.value;
-            scenario.deserializeOnStart = true;
-
             // Create build directory
             var pathToProjectBuild = Application.dataPath + "/../" + "Build/";
             if (!Directory.Exists(pathToProjectBuild + m_RunNameField.value))

com.unity.perception/Editor/Randomization/Uxml/Randomizer/AddRandomizerMenu.uxml

 <UXML xmlns="UnityEngine.UIElements">
     <VisualElement name="container" style="width: 225px; height: 300px; background-color: #383838; border-width: 1px; border-color: #232323;">
-        <Style src="../../Uss/AddRandomizerMenuStyles.uss"/>
-        <TextField name="search-bar" style="padding: 3px;"/>
+        <Style src="../../Uss/Styles.uss"/>
+        <TextField name="search-bar" class="randomizer__menu-search-bar" style="padding: 3px;"/>
-            <VisualElement name="directory-chevron" class="chevron-left"/>
+            <VisualElement name="directory-chevron" class="randomization__chevron-left"/>
+        <VisualElement class="randomizer__menu-search-icon"/>
     </VisualElement>
 </UXML>

com.unity.perception/Editor/Randomization/Uxml/Randomizer/MenuDirectoryElement.uxml

 <UXML xmlns="UnityEngine.UIElements">
-    <VisualElement style="flex-direction: row; justify-content: space-between; align-items: center;" class="menu-element">
+    <VisualElement style="flex-direction: row; justify-content: space-between; align-items: center;" class="randomizer__add-menu-directory-item">
-        <VisualElement class="chevron-right"/>
+        <VisualElement class="randomization__chevron-right"/>
     </VisualElement>
 </UXML>

com.unity.perception/Editor/Randomization/Uxml/Randomizer/RandomizerElement.uxml

-<UXML xmlns="UnityEngine.UIElements" xmlns:editor="UnityEditor.UIElements">
-    <VisualElement class="randomizer-element" style="flex-direction: row;">
-        <Style src="../Uss/ParameterStyles.uss"/>
-        <VisualElement name="drag-handle" class="drag-handle"/>
-
+<UXML xmlns="UnityEngine.UIElements">
+    <VisualElement class="randomizer__element">
+        <VisualElement name="drag-handle" class="randomizer__drag-handle"/>
-                    <VisualElement name="collapse" class="collapse-toggle foldout-open"/>
+                    <VisualElement name="collapse" class="randomization__collapse-toggle foldout-open"/>
-                <Button name="remove" class="remove-option-button"/>
+                <Button name="remove" class="randomization__remove-item-button"/>
-
-            <VisualElement name="properties" class="properties-container" style="padding-left: 16px;"/>
+            <VisualElement name="properties" class="randomization__collapsible-container" style="padding-left: 16px;"/>
         </VisualElement>
     </VisualElement>
 </UXML>

com.unity.perception/Editor/Randomization/Uxml/Randomizer/RandomizerList.uxml

-<UXML xmlns="UnityEngine.UIElements" xmlns:editor="UnityEditor.UIElements">
-    <VisualElement name="randomizers-container" class="dark-viewport" style="margin-top: 6px; min-height: 100px;"/>
+<UXML xmlns="UnityEngine.UIElements">
+    <VisualElement name="randomizers-container" class="scenario__dark-viewport" style="margin-top: 6px; min-height: 100px;"/>
     <VisualElement style="flex-direction: row; align-items: center; justify-content: center; margin-top: 4px;">
         <Button name="add-randomizer-button" text="Add Randomizer"/>
         <Button name="expand-all" text="Expand All"/>

com.unity.perception/Editor/Randomization/Uxml/RunInUSimWindow.uxml

-<UXML xmlns="UnityEngine.UIElements" xmlns:editor="UnityEditor.UIElements" xmlns:randEditor="UnityEngine.Perception.Randomization.Editor">
-    <VisualElement>
-        <Style src="../Uss/RunInUSimStyles.uss"/>
-        <VisualElement class="dark-viewport" style="margin-bottom: 20px;">
-            <VisualElement style="">
-                <TextField name="run-name" label="Run Name"/>
-                <editor:IntegerField name="total-iterations" label="Total Iterations"/>
-                <editor:IntegerField name="instance-count" label="Instance Count" max-value="10000"/>
-                <editor:ObjectField name="main-scene" label="Main Scene" allow-scene-objects="false"/>
-                <editor:ObjectField name="scenario" label="Scenario"/>
-                <VisualElement class="unity-base-field">
-                    <Label text="USim worker config" class="unity-base-field__label"/>
-                    <editor:ToolbarMenu name="sys-param" class="unity-base-field__input" style="border-width: 1px;"/>
-                </VisualElement>
-                <VisualElement style="align-items: center;">
-                    <Button name="run-button" text="Build and Run" style="margin: 10px; padding: 2 20; font-size: 13px;"/>
-                </VisualElement>
-            </VisualElement>
-        </VisualElement>
+<UXML xmlns="UnityEngine.UIElements" xmlns:editor="UnityEditor.UIElements">
+    <TextField name="run-name" label="Run Name"/>
+    <editor:IntegerField name="total-iterations" label="Total Iterations"/>
+    <editor:IntegerField name="instance-count" label="Instance Count" max-value="10000"/>
+    <editor:ObjectField name="main-scene" label="Main Scene" allow-scene-objects="false"/>
+    <editor:ObjectField name="scenario" label="Scenario"/>
+    <VisualElement class="unity-base-field">
+        <Label text="USim worker config" class="unity-base-field__label"/>
+        <editor:ToolbarMenu name="sys-param" class="unity-base-field__input" style="border-width: 1px;"/>
+    </VisualElement>
+    <VisualElement style="align-items: center;">
+        <Button name="run-button" text="Build and Run" style="margin: 10px; padding: 2 20; font-size: 13px;"/>
     </VisualElement>
 </UXML>

com.unity.perception/Editor/Randomization/Uxml/ScenarioBaseElement.uxml

 <UXML xmlns="UnityEngine.UIElements" xmlns:editor="UnityEditor.UIElements">
     <VisualElement>
-        <Style src="../Uss/ScenarioStyles.uss"/>
-        <TextElement class="info-box" text="Scenarios control the execution flow of your simulation by applying randomization parameters. Make sure to always have only one scenario active within your scene."/>
+        <Style src="../Uss/Styles.uss"/>
+        <TextElement
+            class="scenario__info-box"
+            text="Scenarios control the execution flow of your simulation by applying randomization parameters. Make sure to always have only one scenario active within your scene."/>
-
-        <VisualElement name="configuration-container" class="dark-viewport" style="padding-left: 16px">
+        <VisualElement class="scenario__dark-viewport" style="padding-left: 16px">
-                <editor:PropertyField binding-path="constants" tooltip="A custom list of parameters for this scenario that will be JSON serialized. You can add or remove constants by modifying the code for this scenario class. Only these properties of the simulation can be changed externally from a built player."/>
+                <editor:PropertyField
+                    binding-path="constants"
+                    tooltip="A list of parameters for this scenario that will be JSON serialized."/>
-                <editor:PropertyField tooltip="Read constants from JSON when the application starts" name="deserialize-on-start" label="Deserialize On Start" binding-path="deserializeOnStart"/>
                 <VisualElement style="flex-direction: row;">
                     <Button name="serialize-constants" text="Serialize Constants" style="flex-grow: 1;"/>
                     <Button name="deserialize-constants" text="Deserialize Constants" style="flex-grow: 1;"/>
-
-
     </VisualElement>
 </UXML>

com.unity.perception/Editor/Randomization/VisualElements/Randomizer/AddRandomizerMenu.cs

             public MenuItemElement(MenuItem menuItem, AddRandomizerMenu menu)
             {
                 text = menuItem.itemName;
-                AddToClassList("menu-element");
+                AddToClassList("randomizer__add-menu-directory-item");
                 RegisterCallback<MouseUpEvent>(evt => menu.AddRandomizer(menuItem.randomizerType));
             }
         }

com.unity.perception/Runtime/Randomization/Scenarios/Scenario.cs

         /// <exception cref="ScenarioException"></exception>
         public override void Deserialize()
         {
-            if (!File.Exists(serializedConstantsFilePath))
-                throw new ScenarioException($"JSON scenario constants file does not exist at path {serializedConstantsFilePath}");
-            var jsonText = File.ReadAllText(serializedConstantsFilePath);
-            constants = JsonUtility.FromJson<T>(jsonText);
+            if (string.IsNullOrEmpty(serializedConstantsFilePath))
+            {
+                Debug.Log("No constants file specified. Running scenario with built in constants.");
+            }
+            else if (File.Exists(serializedConstantsFilePath))
+            {
+                var jsonText = File.ReadAllText(serializedConstantsFilePath);
+                constants = JsonUtility.FromJson<T>(jsonText);
+            }
+            else
+            {
+                Debug.LogWarning($"JSON scenario constants file does not exist at path {serializedConstantsFilePath}");
+            }
         }
     }
 }

com.unity.perception/Runtime/Randomization/Scenarios/ScenarioBase.cs

         [HideInInspector] public bool quitOnComplete = true;
 
         /// <summary>
-        /// When true, this scenario will deserializes constants from a Json file before it begins executing
-        /// </summary>
-        [HideInInspector] public bool deserializeOnStart;
-
-        /// <summary>
         /// The name of the Json file this scenario's constants are serialized to/from.
         /// </summary>
         [HideInInspector] public string serializedConstantsFileName = "constants";
 
         void Start()
         {
-            if (deserializeOnStart)
-                Deserialize();
+            Deserialize();
         }
 
         void Update()

com.unity.perception/Editor/Randomization/Uxml/Sampler/FloatRangeElement.uxml

     <VisualElement>
         <VisualElement style="flex-direction: row; margin: 1px, 1px, 1px, 3px;">
             <Label text="Range" class="unity-base-field__label" style="min-width: 147;"/>
-            <VisualElement class="float-range" style="flex-grow: 1; flex-direction: row;">
+            <VisualElement class="sampler__float-range" style="flex-grow: 1; flex-direction: row;">
                 <editor:FloatField label="Min" tooltip="Minimum" name="minimum" style="flex-grow: 1; flex-shrink: 0; flex-basis: 0; margin-bottom: 0;"/>
                 <editor:FloatField label="Max" tooltip="Maximum" name="maximum" style="flex-grow: 1; flex-shrink: 0; flex-basis: 0; margin-right: 2px; margin-bottom: 0;"/>
             </VisualElement>

com.unity.perception/Editor/Randomization/VisualElements/Parameter/DrawerParameterElement.cs

             m_Collapsed = property.FindPropertyRelative("collapsed");
 
             AssetDatabase.LoadAssetAtPath<VisualTreeAsset>(
-                $"{StaticData.uxmlDir}/ParameterDrawer.uxml").CloneTree(this);
+                $"{StaticData.uxmlDir}/Parameter/ParameterDrawer.uxml").CloneTree(this);
 
             var collapseToggle = this.Q<VisualElement>("collapse");
             collapseToggle.RegisterCallback<MouseUpEvent>(evt => collapsed = !collapsed);

com.unity.perception/Editor/Randomization/VisualElements/Parameter/ParameterElement.cs

         public ParameterElement(SerializedProperty property)
         {
             var template = AssetDatabase.LoadAssetAtPath<VisualTreeAsset>(
-                $"{StaticData.uxmlDir}/ParameterElement.uxml");
+                $"{StaticData.uxmlDir}/Parameter/ParameterElement.uxml");
             template.CloneTree(this);
             m_SerializedProperty = property;
             m_PropertiesContainer = this.Q<VisualElement>("properties");
         void CreateCategoricalParameterFields()
         {
             var template = AssetDatabase.LoadAssetAtPath<VisualTreeAsset>(
-                $"{StaticData.uxmlDir}/CategoricalParameterTemplate.uxml").CloneTree();
+                $"{StaticData.uxmlDir}/Parameter/CategoricalParameterTemplate.uxml").CloneTree();
 
             var optionsProperty = m_SerializedProperty.FindPropertyRelative("m_Categories");
             var probabilitiesProperty = m_SerializedProperty.FindPropertyRelative("probabilities");
             void ToggleProbabilityFields(bool toggle)
             {
                 if (toggle)
-                    listView.AddToClassList("uniform-probability");
+                    listView.AddToClassList("collapsed");
-                    listView.RemoveFromClassList("uniform-probability");
+                    listView.RemoveFromClassList("collapsed");
             }
             ToggleProbabilityFields(uniformToggle.value);
             if (Application.isPlaying)

com.unity.perception/Editor/Randomization/VisualElements/Parameter/CategoricalOptionElement.cs

             m_ProbabilitiesProperty = probabilitiesProperty;
 
             var template = AssetDatabase.LoadAssetAtPath<VisualTreeAsset>(
-                $"{StaticData.uxmlDir}/CategoricalOptionElement.uxml");
+                $"{StaticData.uxmlDir}/Parameter/CategoricalOptionElement.uxml");
             template.CloneTree(this);
         }
 

com.unity.perception/Editor/Randomization/VisualElements/Sampler/FloatRangeElement.cs

     {
         public FloatRangeElement(SerializedProperty property)
         {
-            var template = AssetDatabase.LoadAssetAtPath<VisualTreeAsset>($"{StaticData.uxmlDir}/FloatRangeElement.uxml");
+            var template = AssetDatabase.LoadAssetAtPath<VisualTreeAsset>(
+                $"{StaticData.uxmlDir}/Sampler/FloatRangeElement.uxml");
             template.CloneTree(this);
 
             var minimumField = this.Q<FloatField>("minimum");

com.unity.perception/Editor/Randomization/VisualElements/Sampler/SamplerElement.cs

         public SamplerElement(SerializedProperty property, Parameter parameter)
         {
             m_Property = property;
-            var template = AssetDatabase.LoadAssetAtPath<VisualTreeAsset>($"{StaticData.uxmlDir}/SamplerElement.uxml");
+            var template = AssetDatabase.LoadAssetAtPath<VisualTreeAsset>(
+                $"{StaticData.uxmlDir}/Sampler/SamplerElement.uxml");
             template.CloneTree(this);
 
             m_Parameter = parameter;

com.unity.perception/Editor/Randomization/VisualElements/Randomizer/DragToReorderManipulator.cs

         float m_Offset;
         RandomizerElement m_RandomizerElement;
         VisualElement m_DragHandle;
-        VisualElement m_DragBar;
+        VisualElement m_ReorderingIndicator;
         VisualElement m_ParameterContainer;
 
         protected override void RegisterCallbacksOnTarget()
             }
 
             m_ParameterContainer = target.parent;
-            m_DragBar = new ParameterDragBar();
-            m_DragBar.style.width = new StyleLength(m_ParameterContainer.resolvedStyle.width);
-            target.parent.Add(m_DragBar);
+            m_ReorderingIndicator = new RandomizerReorderingIndicator();
+            m_ReorderingIndicator.style.width = new StyleLength(m_ParameterContainer.resolvedStyle.width);
+            target.parent.Add(m_ReorderingIndicator);
-            m_DragBar.style.top = evt.localMousePosition.y + m_Offset;
+            m_ReorderingIndicator.style.top = evt.localMousePosition.y + m_Offset;
 
             m_Active = true;
             m_DragHandle.CaptureMouse();
             if (!m_Active || !m_DragHandle.HasMouseCapture())
                 return;
 
-            m_DragBar.style.top = evt.localMousePosition.y + m_Offset;
+            m_ReorderingIndicator.style.top = evt.localMousePosition.y + m_Offset;
 
             evt.StopPropagation();
         }
                 return;
 
             var dragBarY = evt.localMousePosition.y + m_Offset;
-            m_DragBar.RemoveFromHierarchy();
+            m_ReorderingIndicator.RemoveFromHierarchy();
 
             m_Active = false;
             m_DragHandle.ReleaseMouse();

com.unity.perception/Editor/Randomization/Uss/Styles.uss

+/* General randomization classes */
+.randomization__remove-item-button {
+    width: 12px;
+    height: 14px;
+    background-image: resource("Packages/com.unity.perception/Editor/Randomization/Icons/X.png");
+}
+
+.randomization__collapse-toggle {
+    flex-shrink: 0;
+    margin-right: 3px;
+    margin-left: 3px;
+    width: 10px;
+    height: 10px;
+    background-image: resource("Packages/com.unity.perception/Editor/Randomization/Icons/FoldoutOpen.png");
+}
+
+.collapsed .randomization__collapse-toggle {
+    background-image: resource("Packages/com.unity.perception/Editor/Randomization/Icons/FoldoutClosed.png");
+}
+
+.randomization__collapse-toggle:hover {
+    -unity-background-image-tint-color: cornflowerblue;
+}
+
+.collapsed .randomization__collapsible-container {
+    display: none;
+}
+
+.randomization__chevron-left {
+    height: 12px;
+    width: 12px;
+    background-image: resource("Packages/com.unity.perception/Editor/Randomization/Icons/ChevronLeft.png");
+}
+
+.randomization__chevron-right {
+    height: 12px;
+    width: 12px;
+    background-image: resource("Packages/com.unity.perception/Editor/Randomization/Icons/ChevronRight.png");
+}
+
+
+/* Scenario classes */
+.scenario__info-box {
+    border-width: 1px;
+    border-color: #191919;
+    padding: 2px 4px 2px 4px;
+    white-space: normal;
+    margin-top: 4px;
+    margin-bottom: 4px;
+}
+
+.scenario__dark-viewport {
+    border-radius: 5px;
+    background-color: #191919;
+    padding: 2px;
+}
+
+
+/* Randomizer classes */
+.randomizer__drag-bar {
+    width: 100px;
+    height: 6px;
+    background-color: rgba(100,149,237,0.4);
+    position: absolute;
+}
+
+.randomizer__element {
+    border-width: 2px;
+    border-radius: 5px;
+    margin: 2px 1px;
+    background-color: #383838;
+    flex-direction: row;
+}
+
+.randomizer__drag-handle {
+    flex-shrink: 0;
+    width: 16px;
+    height: 100%;
+    min-height: 20px;
+    background-image: resource("Packages/com.unity.perception/Editor/Randomization/Icons/DragHandle.png");
+}
+
+.randomizer__drag-handle:hover {
+    -unity-background-image-tint-color: black;
+}
+
+.randomizer__add-menu-directory-item {
+    padding: 2px 10px 2px 20px;
+}
+
+.randomizer__add-menu-directory-item:hover {
+    background-color: #3E5F96;
+}
+
+.randomizer__reordering-hover-indicator {
+    width: 100px;
+    height: 6px;
+    background-color: rgba(100,149,237,0.4);
+    position: absolute;
+}
+
+.randomizer__menu-search-icon {
+    position: absolute;
+    left: 10px;
+    top: 9px;
+    width: 10px;
+    height: 10px;
+    background-image: resource("Packages/com.unity.perception/Editor/Randomization/Icons/Search.png");
+}
+
+.randomizer__menu-search-bar .unity-base-text-field__input {
+    padding-left: 15px;
+}
+
+
+/* Parameter classes */
+.parameter__categorical-option {
+    flex-direction: row;
+    background-color: #3F3F3F;
+    margin: 1px;
+    border-radius: 4px;
+}
+
+.parameter__categorical-options-list {
+    background-color: #191919;
+    border-radius: 4px;
+    margin-right: 2px;
+    padding: 3px;
+    border-bottom-right-radius: 0;
+}
+
+.parameter__categorical-option-property-field {
+    width: 0;
+    flex-grow: 1;
+    flex-shrink: 0;
+}
+
+.parameter__categorical-options-list-button {
+    align-self: flex-end;
+    border-width: 0;
+    border-top-right-radius: 0;
+    border-top-left-radius: 0;
+    background-color: #191919;
+    margin-top: 0;
+    margin-right: 2px;
+}
+
+.parameter__categorical-options-list-button:hover {
+    background-color: #2A2A2A;
+}
+
+.parameter__categorical-options-list-button:active {
+    color: cornflowerblue;
+}
+
+
+/* Sampler classes */
+.sampler__type-menu {
+    flex-grow: 1.5;
+    border-radius: 3px;
+    border-width: 1px;
+    margin-top: 2px;
+    margin-right: 3px;
+}
+
+.sampler__float-range .unity-base-field__label {
+    min-width: auto;
+    margin-right: 4px;
+}

com.unity.perception/Editor/Randomization/Uss/Styles.uss.meta

+fileFormatVersion: 2
+guid: a3321de444a246f59e8a0445d5d2bf5d
+timeCreated: 1601665266

com.unity.perception/Editor/Randomization/Uxml/Parameter.meta

+fileFormatVersion: 2
+guid: 9dff455d50ac4549bac301eb5926c83c
+timeCreated: 1601668963

com.unity.perception/Editor/Randomization/Uxml/Sampler.meta

+fileFormatVersion: 2
+guid: cdf29c5fa139470d961ca4605d792f0a
+timeCreated: 1601668985

com.unity.perception/Editor/Randomization/VisualElements/Parameter.meta

+fileFormatVersion: 2
+guid: 198e373f78464aa7a4bf4211e82434dc
+timeCreated: 1601669088

com.unity.perception/Editor/Randomization/VisualElements/Randomizer/RandomizerReorderingIndicator.cs

+using UnityEngine.UIElements;
+
+namespace UnityEngine.Experimental.Perception.Randomization.Editor
+{
+    class RandomizerReorderingIndicator : VisualElement
+    {
+        public RandomizerReorderingIndicator()
+        {
+            AddToClassList("randomizer__reordering-hover-indicator");
+        }
+    }
+}

com.unity.perception/Editor/Randomization/VisualElements/Sampler.meta

+fileFormatVersion: 2
+guid: 650bdb8ee9ab42f99509974c7a076e00
+timeCreated: 1601669132

com.unity.perception/Editor/Randomization/Uxml/Parameter/CategoricalOptionElement.uxml

+<UXML xmlns="UnityEngine.UIElements" xmlns:editor="UnityEditor.UIElements">
+    <VisualElement class="parameter__categorical-option">
+        <Button name="remove" class="randomization__remove-item-button"/>
+        <Label name="index-label" text="[0]" style="min-width: 50px;"/>
+        <editor:PropertyField name="option" class="parameter__categorical-option-property-field"/>
+        <editor:FloatField label="p:" name="probability" tooltip="Probability" class="randomization__collapsible-container" style="min-width: 40px; flex-grow: 0.15;"/>
+    </VisualElement>
+</UXML>

com.unity.perception/Editor/Randomization/Uxml/Parameter/CategoricalParameterTemplate.uxml

+<UXML xmlns="UnityEngine.UIElements" xmlns:editor="UnityEditor.UIElements">
+    <Toggle label="Uniform" name="uniform"/>
+    <editor:IntegerField label="Seed" name="seed"/>
+    <VisualElement class="parameter__categorical-options-list">
+        <ListView name="options"/>
+    </VisualElement>
+    <VisualElement style="flex-direction: row; justify-content: flex-end;">
+        <Button name="add-option" text="Add Option" class="parameter__categorical-options-list-button"/>
+        <Button name="add-folder" text="Add Folder" class="parameter__categorical-options-list-button"/>
+        <Button name="clear-options" text="Clear Options" class="parameter__categorical-options-list-button"/>
+    </VisualElement>
+</UXML>

com.unity.perception/Editor/Randomization/Uxml/Parameter/ParameterDrawer.uxml

+<UXML xmlns="UnityEngine.UIElements">
+    <VisualElement>
+        <Style src="../../Uss/Styles.uss"/>
+        <VisualElement style="flex-direction: row; align-items: center;">
+            <VisualElement name="collapse" class="randomization__collapse-toggle foldout-open"/>
+            <Label name="field-name" style="font-size: 12px;"/>
+        </VisualElement>
+        <VisualElement name="drawer" class="randomization__collapsible-container" style="padding-left: 18px;"/>
+    </VisualElement>
+</UXML>

com.unity.perception/Editor/Randomization/Uxml/Parameter/ParameterElement.uxml

+<UXML xmlns="UnityEngine.UIElements">
+    <VisualElement>
+        <Style src="../../Uss/Styles.uss"/>
+        <VisualElement name="properties"/>
+    </VisualElement>
+</UXML>

com.unity.perception/Editor/Randomization/Uxml/Sampler/SamplerElement.uxml

+<UXML xmlns="UnityEngine.UIElements" xmlns:editor="UnityEditor.UIElements">
+    <VisualElement name="sampler-template" style="margin-bottom: 4px;">
+        <Style src="../../Uss/Styles.uss"/>
+        <VisualElement style="flex-direction: row; align-items: center;">
+            <Label name="sampler-name" text="Sampler Name" class="unity-base-field__label"/>
+            <editor:ToolbarMenu name="sampler-type-dropdown" text="Placeholder Sampler Type" class="sampler__type-menu"/>
+        </VisualElement>
+        <VisualElement name="fields-container" style="margin-left: 18px;"/>
+    </VisualElement>
+</UXML>

com.unity.perception/Editor/Randomization/Uss/ParameterStyles.uss

-.randomizer-element {
-    border-width: 2px;
-    border-radius: 5px;
-    margin: 2px 1px;
-    background-color: #383838;
-}
-
-.parameter-type-label-container {
-    flex-direction: row;
-    justify-content: space-between;
-    align-items: center;
-    margin-bottom: 1px;
-}
-
-.parameter-type-label-box {
-    flex-direction: row;
-    align-items: center;
-    justify-content: flex-start;
-    flex-grow: 0;
-    -unity-text-align: middle-center;
-    border-width: 0;
-    padding: 1px;
-    font-size: 13px;
-}
-
-.parameter-type-label {
-    color: cornflowerblue;
-    -unity-text-align: middle-left;
-    margin-right: 4px;
-}
-
-.parameter-type-label-box .unity-base-text-field__input {
-    padding-left: 6px;
-    padding-right: 6px;
-}
-
-.collapse-toggle {
-    flex-shrink: 0;
-    margin-right: 3px;
-    margin-left: 3px;
-    width: 12px;
-    height: 12px;
-    background-image: resource("Packages/com.unity.perception/Editor/Randomization/Icons/FoldoutOpen.png");
-}
-
-.collapsed .collapse-toggle {
-    background-image: resource("Packages/com.unity.perception/Editor/Randomization/Icons/FoldoutClosed.png");
-}
-
-.collapsed .properties-container {
-    display: none;
-}
-
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com.unity.perception/Editor/Randomization/Uss/ParameterStyles.uss.meta

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->>>>>>> 86d25d2... implemented parameter behaviours

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->>>>>>> 86d25d2... implemented parameter behaviours

com.unity.perception/Editor/Randomization/Uss/ScenarioStyles.uss

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com.unity.perception/Editor/Randomization/Uxml/CategoricalOptionElement.uxml

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-    <VisualElement class="categorical-option">
-        <Button name="remove" class="remove-option-button"/>
-        <Label name="index-label" text="[0]" style="min-width: 50px;"/>
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com.unity.perception/Editor/Randomization/Uxml/CategoricalParameterTemplate.uxml

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com.unity.perception/Editor/Randomization/Uxml/ParameterElement.uxml

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com.unity.perception/Editor/Randomization/Uxml/SamplerElement.uxml

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com.unity.perception/Editor/Randomization/Uxml/ParameterDrawer.uxml

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com.unity.perception/Editor/Randomization/VisualElements/ParameterDragBar.cs

-using UnityEngine.UIElements;
-
-namespace UnityEngine.Experimental.Perception.Randomization.Editor
-{
-    class ParameterDragBar : VisualElement
-    {
-        public ParameterDragBar()
-        {
-            AddToClassList("drag-bar");
-        }
-    }
-}