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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| import React, { useRef, useContext, useEffect } from 'react'; | ||
| import classnames from 'classnames'; | ||
|
|
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| import { getNodesInside } from '../../graph-utils'; | ||
| import { GraphContext } from '../../GraphContext'; | ||
|
|
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| const baseStyle = { | ||
| position: 'absolute', | ||
| zIndex: 5, | ||
| bottom: 10, | ||
| right: 10, | ||
| width: 200, | ||
| }; | ||
|
|
||
| export default ({ style, className, bgColor = '#f8f8f8', nodeColor = '#ddd' }) => { | ||
| const canvasNode = useRef(null); | ||
| const { state } = useContext(GraphContext); | ||
| const mapClasses = classnames('react-graph__minimap', className); | ||
| const nodePositions = state.nodes.map(n => n.__rg.position); | ||
| const width = style.width || baseStyle.width; | ||
| const height = (state.height / (state.width || 1)) * width; | ||
| const bbox = { x: 0, y: 0, width: state.width, height: state.height }; | ||
| const scaleFactor = width / state.width; | ||
|
|
||
| useEffect(() => { | ||
| if (canvasNode) { | ||
| const ctx = canvasNode.current.getContext('2d'); | ||
| const nodesInside = getNodesInside(state.nodes, bbox, state.transform); | ||
|
|
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| ctx.fillStyle = bgColor; | ||
| ctx.fillRect(0, 0, width, height); | ||
|
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| nodesInside.forEach((n) => { | ||
| const pos = n.__rg.position; | ||
| const transformX = state.transform[0]; | ||
| const transformY = state.transform[1]; | ||
| const x = (pos.x * state.transform[2]) + transformX; | ||
| const y = (pos.y * state.transform[2]) + transformY; | ||
|
|
||
| ctx.fillStyle = nodeColor; | ||
| ctx.fillRect( | ||
| (x * scaleFactor), | ||
| (y * scaleFactor), | ||
| n.__rg.width * scaleFactor, | ||
| n.__rg.height * scaleFactor) | ||
| ; | ||
| }); | ||
| } | ||
| }, [nodePositions, state.transform, height]) | ||
|
|
||
| return ( | ||
| <canvas | ||
| style={{ | ||
| ...baseStyle, | ||
| ...style, | ||
| height | ||
| }} | ||
| width={width} | ||
| height={height} | ||
| className={mapClasses} | ||
| ref={canvasNode} | ||
| /> | ||
| ); | ||
| } |
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