feat: added node-tooltips to the editor

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
+}