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fix: stop connector fork line from overlapping child cards

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Replace the two-element approach (separate fork line + child lanes div with
mismatched maxWidth values) with a single relative-positioned container.
The fork line is absolutely positioned and its left/right are calculated from
the number of children so it spans exactly from the center of the first lane
to the center of the last lane.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
chihlasm
2026-02-18 03:21:43 -05:00
parent 8d8f557951
commit 66a0fb01a2
1 changed files with 22 additions and 20 deletions
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42
frontend/src/components/tree-editor/TreeCanvas.tsx
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@@ -619,29 +619,31 @@ export function TreeCanvas() {
</div>
) : (
// Multiple children: horizontal branching
<div className="flex flex-col items-center w-full">
{/* Horizontal fork line */}
// The fork line and child lanes share the same flex container so the
// line is sized by the actual rendered children, not a hardcoded estimate.
<div className="flex items-start justify-center gap-6 w-full relative"
style={{ maxWidth: `${orderedChildren.length * 360}px` }}
>
{/* Horizontal fork line — absolutely positioned, aligned to child centers.
Spans from center of first lane to center of last lane. */}
<div
className="h-px bg-border w-full"
style={{ maxWidth: `${orderedChildren.length * 300}px` }}
className="absolute top-0 h-px bg-border pointer-events-none"
style={{
left: `calc(${100 / (orderedChildren.length * 2)}%)`,
right: `calc(${100 / (orderedChildren.length * 2)}%)`,
}}
/>
{/* Child lanes */}
<div
className="flex items-start justify-center gap-6 pt-0 w-full"
style={{ maxWidth: `${orderedChildren.length * 360}px` }}
>
{orderedChildren.map(({ child, optionLabel: ol, childIndex }) => (
<div
key={child.id}
className="flex flex-col items-center min-w-[260px]"
>
{/* Vertical stub into child lane */}
<div className="h-4 w-px bg-border" />
{renderNode(child, node.id, childIndex, ol)}
</div>
))}
</div>
{orderedChildren.map(({ child, optionLabel: ol, childIndex }) => (
<div
key={child.id}
className="flex flex-col items-center min-w-[260px]"
>
{/* Vertical stub into child lane */}
<div className="h-4 w-px bg-border" />
{renderNode(child, node.id, childIndex, ol)}
</div>
))}
</div>
)}
</div>