# XWUIChartGraphBlocks

The shared chart-tier base (`XWUIChartGraphBlockBase`) for graph-layout chart variants - network, tree, org, and similar node-link diagrams - built on `XWUIChart`. Concrete variants subclass it and set only a static `variant` definition (a `cssPrefix` plus layout defaults such as `layoutMode`); data is supplied as `nodes` and `links` rather than `series`, and `block`/`size` plus layout options (`layoutMode`, `layoutDirection`, minimap, interactivity) come from the shared contract.

## Basic Usage

Defines a one-off `MyTopologyChart` subclass with a force layout, then renders a four-node cluster topology (lb, web-1, web-2, db) wired by four links.

```example
file: examples/BasicUsage.ts
html: examples/BasicUsage.html
title: Basic Usage
description: A custom graph subclass rendering a four-node cluster topology from nodes and links with a force layout.
```

```api
```