What is the Neural Link?

The Neural Link is a bi-directional bridge that connects AI agents directly to the Neo.mjs runtime. It lets agents inspect the Scene Graph, component state, event listeners, computed styles, and DOM rectangles, and mutate the running application in real time.

Why is Neo.mjs called an Application Engine instead of a framework?

Neo.mjs maintains persistent application objects in a worker-backed Scene Graph instead of compiling application state away into ephemeral DOM nodes. That architecture enables multi-window orchestration, runtime permutation, and deep AI introspection.

What is Context Engineering?

Context Engineering shapes the information and tool environment around AI agents. Neo.mjs implements it through Knowledge Base, Memory Core, GitHub Workflow, and Neural Link MCP servers for frontier harnesses, plus a File System MCP server for internal Neo.ai.Agent local loops.

What is the Neo.mjs Agent OS?

The Neo.mjs Agent OS is the repository Brain: source code and services for Memory Core, Knowledge Base, Active Hybrid GraphRAG, DreamService, Golden Path synthesis, A2A coordination, and Neural Link tooling.

Frontmatter

id	8911
title	Enable Mouse Drag Scrolling in Grid ScrollManager
state	Closed
labels	ai
assignees	tobiu
createdAt	Jan 30, 2026, 11:49 AM
updatedAt	Jan 30, 2026, 12:33 PM
githubUrl	https://github.com/neomjs/neo/issues/8911
author	tobiu
commentsCount	1
parentIssue	null
subIssues	[]
subIssuesCompleted	0
subIssuesTotal	0
contentTrust
projected
quarantined	0
signals	[]
blockedBy	[]
blocking	[]
closedAt	Jan 30, 2026, 12:32 PM

Enable Mouse Drag Scrolling in Grid ScrollManager

Closed v11.24.0/archive-v11-24-0-chunk-1 ai

tobiu commented on Jan 30, 2026, 11:49 AM

Enhance Neo.grid.ScrollManager to support mouse-based drag-to-scroll on desktop, improving DX for users without horizontal scroll wheels.

Requirements:

Add mousedown, mousemove, mouseup, and mouseleave listeners to gridBody.
Implement onMouseDown, onMouseMove, onMouseUp, onMouseLeave handlers in ScrollManager.
Calculate deltaX and deltaY from mouse movements and apply them via DomAccess.scrollTo, mirroring the existing touch logic.
Add mouseDragScroll_ config (default: true) to toggle this feature.
Ensure native text selection is prevented during drag (preventDefault) to give a "Hand Tool" feel.
Important: mousemove listener must be registered with local: true to avoid flooding the worker bridge.

Architecture: This implementation remains isolated within ScrollManager and does not require enabling the global Touch sensor on desktop, avoiding conflicts with the main DragDrop system.

tobiu Jan 30, 2026, 12:33 PM

Input from Gemini 3 Pro:

✦ I have implemented the mouse drag scrolling enhancements in src/grid/ScrollManager.mjs.

Changes:

Mouse Listener Support: Added mousedown, mousemove (local), mouseup, and mouseleave listeners to gridBody in construct.

Unified Delta Logic: Implemented onMouseDown, onMouseMove, onMouseUp, onMouseLeave to handle drag-to-scroll logic, mirroring the touch implementation but isolated for mouse events.

Config: Added mouseDragScroll_ (default true) to toggle the feature.

Added afterSetMouseDragScroll to toggle the neo-mouse-drag-scroll class on the body.

Updated resources/scss/src/grid/Body.scss to disable user-select when this class is present.

Touch Conflict Resolution: Added logic in construct to automatically set mouseDragScroll = false if Neo.config.hasTouchEvents is detected, preventing conflicts on hybrid devices.

State: Added isMouseDragging, lastMouseX, lastMouseY to track drag state.

This implementation allows users to scroll the grid by dragging with the mouse, improving DX for users without horizontal scrolling hardware.

Closing the ticket.

2026-09-02T09:46:29Z @neo-opus-vega cross-referenced by #18065