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feat: edges highlights on drag #357

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Merged
pchalamet merged 1 commit into from
Jan 16, 2026
Merged

feat: edges highlights on drag #357

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31 changes: 31 additions & 0 deletions src/Terrabuild.UI/src/App.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,7 @@ const App = () => {
const [manualPositions, setManualPositions] = useState<
Record<string, { x: number; y: number }>
>({});
const [draggedNodeId, setDraggedNodeId] = useState<string | null>(null);
const [nodes, setNodes] = useNodesState([]);
const [edges, setEdges, onEdgesChange] = useEdgesState([]);
const flowInstance = useRef<ReactFlowInstance | null>(null);
Expand Down Expand Up @@ -427,6 +428,34 @@ const App = () => {
return layoutGraph(flowNodes, flowEdges);
}, [graph, selectedNodeId, layoutVersion, effectiveColorScheme, theme]);

useEffect(() => {
const isDark = effectiveColorScheme === "dark";
const defaultStroke = isDark ? theme.colors.dark[3] : theme.colors.gray[5];
const highlightStroke = theme.colors.blue[6];
setEdges((current) =>
current.map((edge) => {
const isConnected =
draggedNodeId !== null &&
(edge.source === draggedNodeId || edge.target === draggedNodeId);
const stroke = isConnected ? highlightStroke : defaultStroke;
return {
...edge,
style: {
...edge.style,
stroke,
strokeWidth: isConnected ? 2 : 1,
},
markerStart: edge.markerStart
? {
...edge.markerStart,
color: stroke,
}
: edge.markerStart,
};
})
);
}, [draggedNodeId, effectiveColorScheme, theme, setEdges]);

const nodeCount = graph ? Object.keys(graph.nodes).length : 0;
const rootNodeCount = graph?.rootNodes?.length ?? 0;
const formatLabel = (value: string) =>
Expand Down Expand Up @@ -876,6 +905,8 @@ const App = () => {
onNodeClick={(_, node) =>
loadProjectResults(node.data.meta as ProjectNode)
}
onNodeDragStart={(_, node) => setDraggedNodeId(node.id)}
onNodeDragStop={() => setDraggedNodeId(null)}
onReflow={() => {
setManualPositions({});
setLayoutVersion((value) => value + 1);
Expand Down
12 changes: 9 additions & 3 deletions src/Terrabuild.UI/src/components/GraphPanel.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,8 @@ type GraphPanelProps = {
onNodesChange: OnNodesChange;
onEdgesChange: OnEdgesChange;
onNodeClick: NodeMouseHandler;
onNodeDragStart: NodeMouseHandler;
onNodeDragStop: NodeMouseHandler;
onReflow: () => void;
};

Expand All @@ -33,6 +35,8 @@ const GraphPanel = ({
onNodesChange,
onEdgesChange,
onNodeClick,
onNodeDragStart,
onNodeDragStop,
onReflow,
}: GraphPanelProps) => {
return (
Expand Down Expand Up @@ -87,9 +91,11 @@ const GraphPanel = ({
elementsSelectable
panOnDrag
onNodesChange={onNodesChange}
onEdgesChange={onEdgesChange}
onNodeClick={onNodeClick}
>
onEdgesChange={onEdgesChange}
onNodeClick={onNodeClick}
onNodeDragStart={onNodeDragStart}
onNodeDragStop={onNodeDragStop}
>
<Background gap={24} />
<Controls position="bottom-right" />
</ReactFlow>
Expand Down