src/pages/VisProgPage/VisProg.module.css

@@ -33,6 +33,12 @@
 
 /* Node Styles */
 
+:global(.react-flow__node.selected) {
+    outline: 1px dashed blue !important;
+    border-radius: 5pt;
+    outline-offset: 4px;
+}
+
 .default-node {
     padding: 10px 15px;
     background-color: canvas;
@@ -41,6 +47,8 @@
     filter: drop-shadow(0 0 0.75rem black);
 }
 
+
+
 .node-norm {
     outline: rgb(0, 149, 25) solid 2pt;
     filter: drop-shadow(0 0 0.25rem forestgreen);
@@ -76,10 +84,13 @@
     filter: drop-shadow(0 0 0.25rem plum);
 }
 
+
+
 .draggable-node {
     padding: 3px 10px;
     background-color: canvas;
     border-radius: 5pt;
+    cursor: move;
     outline: black solid 2pt;
     filter: drop-shadow(0 0 0.75rem black);
 }
@@ -88,6 +99,7 @@
     padding: 3px 10px;
     background-color: canvas;
     border-radius: 5pt;
+    cursor: move;
     outline: forestgreen solid 2pt;
     filter: drop-shadow(0 0 0.25rem forestgreen);
 }
@@ -96,6 +108,7 @@
     padding: 3px 10px;
     background-color: canvas;
     border-radius: 5pt;
+    cursor: move;
     outline: yellow solid 2pt;
     filter: drop-shadow(0 0 0.25rem yellow);
 }
@@ -104,6 +117,7 @@
     padding: 3px 10px;
     background-color: canvas;
     border-radius: 5pt;
+    cursor: move;
     outline: teal solid 2pt;
     filter: drop-shadow(0 0 0.25rem teal);
 }
@@ -112,6 +126,7 @@
     padding: 3px 10px;
     background-color: canvas;
     border-radius: 5pt;
+    cursor: move;
     outline: dodgerblue solid 2pt;
     filter: drop-shadow(0 0 0.25rem dodgerblue);
 }
@@ -120,6 +135,7 @@
     padding: 3px 10px;
     background-color: canvas;
     border-radius: 5pt;
+    cursor: move;
     outline: orange solid 2pt;
     filter: drop-shadow(0 0 0.25rem orange);
 }
@@ -128,6 +144,7 @@
     padding: 3px 10px;
     background-color: canvas;
     border-radius: 5pt;
+    cursor: move;
     outline: red solid 2pt;
     filter: drop-shadow(0 0 0.25rem red);
 }
@@ -136,6 +153,7 @@
     padding: 3px 10px;
     background-color: canvas;
     border-radius: 5pt;
+    cursor: move;
     outline: plum solid 2pt;
     filter: drop-shadow(0 0 0.25rem plum);
 }
@@ -152,4 +170,53 @@
 
 .bottomRightHandle {
   left: 60% !important;
+}
+
+.node-toolbar-tooltip {
+    background-color: darkgray;
+    color: white;
+    padding: 8px 12px;
+    border-radius: 6px;
+    font-size: 12px;
+    font-family: sans-serif;
+    font-weight: bold;
+    cursor: help;
+    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
+    white-space: nowrap;
+}
+
+.custom-tooltip {
+    pointer-events: none;
+    background-color: Canvas;
+    color: CanvasText;
+    padding: 8px 12px;
+    border-radius: 0 6px 6px 0;
+    outline: CanvasText solid 2px;
+    font-size: 14px;
+    filter: drop-shadow(0 0 0.25rem CanvasText);
+    white-space: nowrap;
+    position: relative;
+    animation: fadeIn 0.2s ease-out;
+}
+
+.custom-tooltip-header {
+    pointer-events: none;
+    background-color: CanvasText;
+    color: Canvas;
+    padding: 8px 12px;
+    border-radius: 6px 0 0 6px;
+    outline: CanvasText solid 2px;
+    font-size: 14px;
+    font-weight: bold;
+    font-variant-caps: small-caps;
+    filter: drop-shadow(0 0 0.25rem CanvasText);
+    white-space: nowrap;
+    position: relative;
+    animation: fadeIn 0.2s ease-out;
+}
+
+
+@keyframes fadeIn {
+    from { opacity: 0; transform: translateY(5px); }
+    to { opacity: 1; transform: translateY(0); }
 }

src/pages/VisProgPage/VisProg.tsx

@@ -7,7 +7,7 @@ import {
   MarkerType,
 } from '@xyflow/react';
 import '@xyflow/react/dist/style.css';
-import {useEffect} from "react";
+import {type CSSProperties, useEffect, useState} from "react";
 import {useShallow} from 'zustand/react/shallow';
 import orderPhaseNodeArray from "../../utils/orderPhaseNodes.ts";
 import useProgramStore from "../../utils/programStore.ts";
@@ -79,7 +79,7 @@ const VisProgUI = () => {
     endBatchAction,
     scrollable
   } = useFlowStore(useShallow(selector)); // instructs the editor to use the corresponding functions from the FlowStore
-
+  const [zoom, setZoom] = useState(1);
   // adds ctrl+z and ctrl+y support to respectively undo and redo actions
   useEffect(() => {
     const handler = (e: KeyboardEvent) => {
@@ -91,7 +91,7 @@ const VisProgUI = () => {
   });
 
   return (
-    <div className={`${styles.innerEditorContainer} round-lg border-lg`}>
+    <div className={`${styles.innerEditorContainer} round-lg border-lg`} style={({'--flow-zoom': zoom} as CSSProperties)}>
       <ReactFlow
         nodes={nodes}
         edges={edges}
@@ -107,6 +107,7 @@ const VisProgUI = () => {
         onNodeDragStart={beginBatchAction}
         onNodeDragStop={endBatchAction}
         preventScrolling={scrollable}
+        onMove={(_, viewport) => setZoom(viewport.zoom)}
         snapToGrid
         fitView
         proOptions={{hideAttribution: true}}

src/pages/VisProgPage/visualProgrammingUI/NodeRegistry.ts

@@ -3,7 +3,8 @@ import EndNode, {
   EndConnectionSource,
   EndDisconnectionTarget,
   EndDisconnectionSource,
-  EndReduce
+  EndReduce,
+  EndTooltip
 } from "./nodes/EndNode";
 import { EndNodeDefaults } from "./nodes/EndNode.default";
 import StartNode, {
@@ -11,7 +12,8 @@ import StartNode, {
   StartConnectionSource,
   StartDisconnectionTarget,
   StartDisconnectionSource,
-  StartReduce
+  StartReduce,
+  StartTooltip
 } from "./nodes/StartNode";
 import { StartNodeDefaults } from "./nodes/StartNode.default";
 import PhaseNode, {
@@ -19,7 +21,8 @@ import PhaseNode, {
   PhaseConnectionSource,
   PhaseDisconnectionTarget,
   PhaseDisconnectionSource,
-  PhaseReduce
+  PhaseReduce,
+  PhaseTooltip
 } from "./nodes/PhaseNode";
 import { PhaseNodeDefaults } from "./nodes/PhaseNode.default";
 import NormNode, {
@@ -27,7 +30,8 @@ import NormNode, {
   NormConnectionSource,
   NormDisconnectionTarget,
   NormDisconnectionSource,
-  NormReduce
+  NormReduce,
+  NormTooltip
 } from "./nodes/NormNode";
 import { NormNodeDefaults } from "./nodes/NormNode.default";
 import GoalNode, {
@@ -35,7 +39,8 @@ import GoalNode, {
   GoalConnectionSource,
   GoalDisconnectionTarget,
   GoalDisconnectionSource,
-  GoalReduce
+  GoalReduce,
+  GoalTooltip
 } from "./nodes/GoalNode";
 import { GoalNodeDefaults } from "./nodes/GoalNode.default";
 import TriggerNode, {
@@ -43,10 +48,18 @@ import TriggerNode, {
   TriggerConnectionSource,
   TriggerDisconnectionTarget,
   TriggerDisconnectionSource,
-  TriggerReduce
+  TriggerReduce,
+  TriggerTooltip
 } from "./nodes/TriggerNode";
 import { TriggerNodeDefaults } from "./nodes/TriggerNode.default";
-import BasicBeliefNode, { BasicBeliefConnectionSource, BasicBeliefConnectionTarget, BasicBeliefDisconnectionSource, BasicBeliefDisconnectionTarget, BasicBeliefReduce } from "./nodes/BasicBeliefNode";
+import BasicBeliefNode, {
+  BasicBeliefConnectionSource,
+  BasicBeliefConnectionTarget,
+  BasicBeliefDisconnectionSource,
+  BasicBeliefDisconnectionTarget,
+  BasicBeliefReduce,
+  BasicBeliefTooltip
+} from "./nodes/BasicBeliefNode";
 import { BasicBeliefNodeDefaults } from "./nodes/BasicBeliefNode.default";
 
 /**
@@ -173,4 +186,17 @@ export const NodesInPhase = {
   end: () => false,
   phase: () => false,
   basic_belief: () => false,
+}
+
+/**
+ * Collects the tooltips for all nodeTypes so they can be accessed by the tooltip component
+ */
+export const NodeTooltips = {
+  start: StartTooltip,
+  end: EndTooltip,
+  phase: PhaseTooltip,
+  norm: NormTooltip,
+  goal: GoalTooltip,
+  trigger: TriggerTooltip,
+  basic_belief: BasicBeliefTooltip,
 }

src/pages/VisProgPage/visualProgrammingUI/VisProgStores.tsx

@@ -45,9 +45,9 @@ function createNode(id: string, type: string, position: XYPosition, data: Record
 
   //* Initial nodes, created by using createNode. */
   // Start and End don't need to apply the UUID, since they are technically never compiled into a program.
-  const startNode = createNode('start', 'start', {x: 100, y: 100}, {label: "Start"}, false)
-  const endNode = createNode('end', 'end', {x: 500, y: 100}, {label: "End"}, false)
-  const initialPhaseNode = createNode(crypto.randomUUID(), 'phase', {x:200, y:100}, {label: "Phase 1", children : [], isFirstPhase: false, nextPhaseId: null})
+  const startNode = createNode('start', 'start', {x: 110, y: 100}, {label: "Start"}, false)
+  const endNode = createNode('end', 'end', {x: 590, y: 100}, {label: "End"}, false)
+  const initialPhaseNode = createNode(crypto.randomUUID(), 'phase', {x:235, y:100}, {label: "Phase 1", children : [], isFirstPhase: false, nextPhaseId: null})
 
   const initialNodes : Node[] = [startNode, endNode, initialPhaseNode,];
 

src/pages/VisProgPage/visualProgrammingUI/components/DragDropSidebar.tsx

@@ -3,7 +3,8 @@ import { useReactFlow, type XYPosition } from '@xyflow/react';
 import { type ReactNode, useCallback, useRef, useState } from 'react';
 import useFlowStore from '../VisProgStores';
 import styles from '../../VisProg.module.css';
-import { NodeDefaults, type NodeTypes } from '../NodeRegistry'
+import { NodeDefaults, type NodeTypes} from '../NodeRegistry'
+import {Tooltip} from "./NodeComponents.tsx";
 
 /**
  * Props for a draggable node within the drag-and-drop toolbar.
@@ -47,14 +48,17 @@ function DraggableNode({ className, children, nodeType, onDrop }: DraggableNodeP
   });
 
   return (
-    <div className={className} 
-    ref={draggableRef} 
-    id={`draggable-${nodeType}`}
-    data-testid={`draggable-${nodeType}`}
-    >
-      {children}
-    </div>
-  );
+    <Tooltip nodeType={nodeType}>
+      <div>
+        <div className={className}
+             ref={draggableRef}
+             id={`draggable-${nodeType}`}
+             data-testid={`draggable-${nodeType}`}
+        >
+          {children}
+        </div>
+      </div>
+    </Tooltip>)
 }
 
 /**
@@ -133,7 +137,7 @@ export function DndToolbar() {
   }));
 
   return (
-    <div className={`flex-col gap-lg padding-md ${styles.innerDndPanel}`}>
+    <div className={`flex-col gap-lg padding-md ${styles.innerDndPanel}`} id={"draggable-sidebar"}>
       <div className="description">
         You can drag these nodes to the pane to create new nodes.
       </div>

src/pages/VisProgPage/visualProgrammingUI/components/NodeComponents.tsx

@@ -1,7 +1,12 @@
-import { NodeToolbar } from '@xyflow/react';
+import {NodeToolbar} from '@xyflow/react';
 import '@xyflow/react/dist/style.css';
+import {type JSX, useState} from "react";
+import {createPortal} from "react-dom";
+import styles from "../../VisProg.module.css";
+import {NodeTooltips} from "../NodeRegistry.ts";
 import useFlowStore from "../VisProgStores.tsx";
 
+
 /**
  * Props for the Toolbar component.
  *
@@ -24,14 +29,94 @@ type ToolbarProps = {
  * @constructor
  */
 export function Toolbar({nodeId, allowDelete}: ToolbarProps) {
-  const {deleteNode} = useFlowStore();
+  const {nodes, deleteNode} = useFlowStore();
 
-  const deleteParentNode = ()=> {
+
+  const deleteParentNode = () => {
     deleteNode(nodeId);
-  }
+  };
+
+  const nodeType = nodes.find((node) => node.id === nodeId)?.type as keyof typeof NodeTooltips;
   return (
-    <NodeToolbar>
+    <NodeToolbar className={"flex-row align-center"}>
       <button className="Node-toolbar__deletebutton" onClick={deleteParentNode} disabled={!allowDelete}>delete</button>
+      <Tooltip nodeType={nodeType}>
+        <div className={styles.nodeToolbarTooltip}>i</div>
+      </Tooltip>
     </NodeToolbar>);
 }
 
+
+type TooltipProps = {
+  nodeType?: keyof typeof NodeTooltips;
+  children: JSX.Element;
+};
+
+
+/**
+ * A general tooltip component, that can be used as a wrapper for any component
+ * that has a nodeType and a corresponding nodeTooltip.
+ *
+ * currently used to show tooltips for draggable-nodes and nodes inside the editor
+ *
+ * @param {"start" | "end" | "phase" | "norm" | "goal" | "trigger" | "basic_belief" | undefined} nodeType
+ * @param {React.JSX.Element} children
+ * @returns {React.JSX.Element}
+ * @constructor
+ */
+export function Tooltip({ nodeType, children }: TooltipProps) {
+  const [showTooltip, setShowTooltip] = useState(false);
+  const [disabled , setDisabled] = useState(false);
+  const [coords, setCoords] = useState({ top: 0, left: 0 });
+
+  const updateTooltipPos = () => {
+    const rect = document.getElementById("draggable-sidebar")!.getBoundingClientRect();
+    setCoords({
+      // Position exactly below the bottom edge of the draggable sidebar (plus a small gap)
+      top: rect.bottom + 10,
+      left: rect.left + rect.width / 2, // Keep it horizontally centered
+    });
+  };
+
+  return nodeType ?
+    (<div>
+      <div
+        onMouseDown={() => {
+          updateTooltipPos();
+          setShowTooltip(false);
+          setDisabled(true);
+        }}
+        onMouseUp={() => {
+          setDisabled(false);
+        }}
+        onMouseOver={() => {
+          if (!disabled) {
+            updateTooltipPos();
+            setShowTooltip(true);
+          }
+        }}
+        onMouseLeave={ () => setShowTooltip(false)}
+      >
+        {children}
+      </div>
+      {showTooltip && createPortal(
+        <div
+          className={"flex-row"}
+          style={{
+            pointerEvents: 'none',
+            position: 'fixed',
+            top: `${coords.top}px`,
+            left: `${coords.left}px`,
+            transform: 'translateX(-50%)', // Center based on the midpoint
+          }}
+        >
+          <span className={styles.customTooltipHeader}>{nodeType}</span>
+          <span className={styles.customTooltip}>
+            {NodeTooltips[nodeType] || "Available for drag"}
+          </span>
+        </div>,
+        document.body
+      )}
+    </div>
+  ) : children
+}

src/pages/VisProgPage/visualProgrammingUI/components/RuleBasedHandle.module.css

@@ -31,4 +31,13 @@
     filter: drop-shadow(0 0 0.25rem green);
 }
 
+:global(.react-flow__handle) {
+    width: calc(8px / var(--flow-zoom, 1));
+    height: calc(8px / var(--flow-zoom, 1));
+    transition: width 0.1s ease, height 0.1s ease;
+    min-width: 8px;
+    min-height: 8px;
+}
+
+
 

src/pages/VisProgPage/visualProgrammingUI/nodes/BasicBeliefNode.tsx

@@ -39,6 +39,10 @@ type Emotion = { type: "emotion", id: string, value: string, label: "Emotion rec
 
 export type BasicBeliefNode = Node<BasicBeliefNodeData>
 
+// update the tooltip to reflect newly added connection options for a belief
+export const BasicBeliefTooltip = `
+  A belief describes a condition that must be met
+  in order for a connected norm to be activated`;
 
 /**
  * This function is called whenever a connection is made with this node type as the target

src/pages/VisProgPage/visualProgrammingUI/nodes/EndNode.tsx

@@ -55,6 +55,10 @@ export function EndReduce(node: Node, _nodes: Node[]) {
   }
 }
 
+export const EndTooltip = `
+  The end node signifies the endpoint of your program; 
+  the output of the final phase of your program should connect to the end node`;
+
 /**
  * This function is called whenever a connection is made with this node type as the target
  * @param _thisNode the node of this node type which function is called

src/pages/VisProgPage/visualProgrammingUI/nodes/GoalNode.tsx

@@ -144,6 +144,11 @@ export function GoalReduce(node: Node, _nodes: Node[]) {
     }
 }
 
+
+export const GoalTooltip = `
+  The goal node allows you to set goals that Pepper has to achieve
+  before moving to the next phase of your program`;
+
 /**
  * This function is called whenever a connection is made with this node type as the target
  * @param _thisNode the node of this node type which function is called

src/pages/VisProgPage/visualProgrammingUI/nodes/NormNode.tsx

@@ -114,6 +114,10 @@ export function NormReduce(node: Node, nodes: Node[]) {
   return result
 }
 
+export const NormTooltip = `
+  A norm describes a behavioral rule Pepper must follow during the connected phase(-s),
+  for example: "respond using formal language"`;
+
 /**
  * This function is called whenever a connection is made with this node type as the target
  * @param _thisNode the node of this node type which function is called

src/pages/VisProgPage/visualProgrammingUI/nodes/PhaseNode.tsx

@@ -118,6 +118,10 @@ export function PhaseReduce(node: Node, nodes: Node[]) {
     return result;
 }
 
+export const PhaseTooltip = `
+  A phase is a single stage of the program, during a phase Pepper will behave
+  in accordance with any connected norms, goals and triggers`;
+
 /**
  * This function is called whenever a connection is made with this node type as the target (phase)
  * @param _thisNode the node of this node type which function is called

src/pages/VisProgPage/visualProgrammingUI/nodes/StartNode.tsx

@@ -53,6 +53,10 @@ export function StartReduce(node: Node, _nodes: Node[]) {
   }
 }
 
+export const StartTooltip = `
+  The start node acts as the starting point for a program, 
+  it should be connected to the left handle of the first phase of your program`;
+
 /**
  * This function is called whenever a connection is made with this node type as the target
  * @param _thisNode the node of this node type which function is called

src/pages/VisProgPage/visualProgrammingUI/nodes/TriggerNode.tsx

@@ -118,6 +118,11 @@ export function TriggerReduce(node: Node, nodes: Node[]) {
   
 }
 
+
+export const TriggerTooltip = `
+  A trigger node is used to make Pepper execute a predefined plan -
+  consisting of one or more actions - when the connected beliefs are met`;
+
 /**
  * This function is called whenever a connection is made with this node type as the target
  * @param _thisNode the node of this node type which function is called

test/pages/visProgPage/visualProgrammingUI/components/NodeComponents.test.tsx

@@ -0,0 +1,40 @@
+import { fireEvent, screen } from '@testing-library/react';
+import '@testing-library/jest-dom';
+import {Tooltip} from "../../../../../src/pages/VisProgPage/visualProgrammingUI/components/NodeComponents.tsx";
+import {renderWithSidebar} from "../../../../test-utils/test-utils.tsx";
+
+describe('Tooltip component test', () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('renders and shows tooltip content on hover', () => {
+    renderWithSidebar(
+      <Tooltip nodeType="phase">
+        <div>?</div>
+      </Tooltip>
+    );
+
+    const trigger = screen.getByText('?');
+
+    // initially hidden
+    expect(
+      screen.queryByText('Phase tooltip text')
+    ).not.toBeInTheDocument();
+
+    // hover shows tooltip
+    fireEvent.mouseOver(trigger);
+
+    expect(screen.getByText('phase')).toBeInTheDocument();
+    expect(
+      screen.getByText('A phase is a single stage of the program, during a phase Pepper will behave in accordance with any connected norms, goals and triggers')
+    ).toBeInTheDocument();
+
+    // rendered via portal
+    expect(
+      document.body.contains(
+        screen.getByText('A phase is a single stage of the program, during a phase Pepper will behave in accordance with any connected norms, goals and triggers')
+      )
+    ).toBe(true);
+  });
+});

test/test-utils/test-utils.tsx

@@ -19,6 +19,48 @@ export function renderWithProviders(
 }
 
 
+type SidebarRect = Partial<DOMRect>;
+
+const defaultRect: DOMRect = {
+  top: 0,
+  left: 0,
+  bottom: 100,
+  right: 200,
+  width: 200,
+  height: 100,
+  x: 0,
+  y: 0,
+  toJSON: () => {},
+};
+
+/**
+ * Renders a component and injects a mock `#draggable-sidebar`
+ * element required by Tooltip positioning logic.
+ */
+export function renderWithSidebar(
+  ui: ReactElement,
+  rect: SidebarRect = {},
+  options?: RenderOptions
+) {
+  const sidebar = document.createElement('div');
+  sidebar.id = 'draggable-sidebar';
+
+  sidebar.getBoundingClientRect = jest.fn(() => ({
+    ...defaultRect,
+    ...rect,
+  }));
+
+  document.body.appendChild(sidebar);
+
+  const result = render(ui, options);
+
+  return {
+    ...result,
+    sidebar,
+  };
+}
+
+
 // Re-export everything from testing library
 //eslint-disable-next-line react-refresh/only-export-components
 export * from '@testing-library/react';