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Merge pull request airbnb#231 from hshoff/harry-dragii
[drag][demo] add resetOnStart prop, add drawboard demo
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| import React from 'react'; | ||
| import { LinePath } from '@vx/shape'; | ||
| import { localPoint } from '@vx/event'; | ||
| import { Drag } from '@vx/drag'; | ||
| import { curveBasis } from '@vx/curve'; | ||
| import { LinearGradient } from '@vx/gradient'; | ||
|
|
||
| export default class DragII extends React.Component { | ||
| constructor(props) { | ||
| super(props); | ||
| this.state = { | ||
| data: props.data || [], | ||
| }; | ||
| } | ||
| componentDidMount() { | ||
| this.forceUpdate(); | ||
| } | ||
| render() { | ||
| const { width, height } = this.props; | ||
| return ( | ||
| <div className="DragII"> | ||
| <svg width={width} height={height} ref={s => (this.svg = s)}> | ||
| <LinearGradient id="stroke" from="#ff614e" to="#ffdc64" /> | ||
| <rect | ||
| fill="#04002b" | ||
| width={width} | ||
| height={height} | ||
| rx={14} | ||
| /> | ||
| {this.state.data.map((d, i) => { | ||
| return ( | ||
| <LinePath | ||
| key={`line-${i}`} | ||
| stroke="url(#stroke)" | ||
| strokeWidth={3} | ||
| data={d} | ||
| curve={curveBasis} | ||
| x={d => d.x} | ||
| y={d => d.y} | ||
| xScale={d => d} | ||
| yScale={d => d} | ||
| /> | ||
| ); | ||
| })} | ||
| <Drag | ||
| svg={this.svg} | ||
| width={width} | ||
| height={height} | ||
| resetOnStart={true} | ||
| onDragStart={({ x, y }) => { | ||
| // add the new line with the starting point | ||
| this.setState((state, props) => { | ||
| const newLine = [{ x, y }]; | ||
| return { | ||
| data: state.data.concat([newLine]), | ||
| }; | ||
| }); | ||
| }} | ||
| onDragMove={({ x, y, dx, dy }) => { | ||
| // add the new point to the current line | ||
| this.setState((state, props) => { | ||
| const nextData = [...state.data]; | ||
| const point = [{ x: x + dx, y: y + dy }]; | ||
| const i = nextData.length - 1; | ||
| nextData[i] = nextData[i].concat(point); | ||
| return { data: nextData }; | ||
| }); | ||
| }} | ||
| > | ||
| {({ | ||
| x, | ||
| y, | ||
| dx, | ||
| dy, | ||
| isDragging, | ||
| dragStart, | ||
| dragEnd, | ||
| dragMove, | ||
| }) => { | ||
| return ( | ||
| <g> | ||
| {/* decorate the currently drawing line */} | ||
| {isDragging && ( | ||
| <g> | ||
| <rect | ||
| fill="white" | ||
| width={8} | ||
| height={8} | ||
| x={x + dx - 4} | ||
| y={y + dy - 4} | ||
| style={{ pointerEvents: 'none' }} | ||
| /> | ||
| <circle | ||
| cx={x} | ||
| cy={y} | ||
| r={4} | ||
| fill="transparent" | ||
| stroke="white" | ||
| style={{ pointerEvents: 'none' }} | ||
| /> | ||
| </g> | ||
| )} | ||
| {/* create the drawing area */} | ||
| <rect | ||
| fill="transparent" | ||
| width={width} | ||
| height={height} | ||
| onMouseDown={dragStart} | ||
| onMouseUp={dragEnd} | ||
| onMouseMove={dragMove} | ||
| /> | ||
| </g> | ||
| ); | ||
| }} | ||
| </Drag> | ||
| </svg> | ||
| <div className="deets"> | ||
| <div> | ||
| Based on Mike Bostock's{' '} | ||
| <a href="https://bl.ocks.org/mbostock/f705fc55e6f26df29354"> | ||
| Line Drawing | ||
| </a> | ||
| </div> | ||
| </div> | ||
|
|
||
| <style jsx>{` | ||
| .DragII { | ||
| display: flex; | ||
| flex-direction: column; | ||
| user-select: none; | ||
| } | ||
| svg { | ||
| margin: 1rem 0; | ||
| cursor: crosshair; | ||
| } | ||
| .deets { | ||
| display: flex; | ||
| flex-direction: row; | ||
| font-size: 12px; | ||
| } | ||
| .deets > div { | ||
| margin: 0.25rem; | ||
| } | ||
| `}</style> | ||
| </div> | ||
| ); | ||
| } | ||
| } |
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