-
Notifications
You must be signed in to change notification settings - Fork 173
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Antonio Russo
committed
Nov 22, 2020
1 parent
5deecd8
commit 5d66b0f
Showing
40 changed files
with
353 additions
and
61 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| import React, { useMemo } from 'react'; | ||
| import PropTypes from 'prop-types'; | ||
|
|
||
| const parallaxRatio = 1.25; | ||
| const calcCoordinates = (x, y) => ([x * parallaxRatio, y * parallaxRatio]); | ||
| const calcTransformation = (x, y, scale) => (`scale(${scale}) translate(${x}, ${y})`); | ||
|
|
||
| /** | ||
| * Canvas background | ||
| */ | ||
| const BackgroundGrid = ({ translateX, translateY, scale, svgPatternColor, svgPatternOpacity }) => { | ||
| const [x, y] = useMemo(() => calcCoordinates(translateX, translateY), [translateX, translateY]); | ||
| const transformation = useMemo(() => calcTransformation(x, y, scale), [x, y, scale]); | ||
|
|
||
| return ( | ||
| <svg width="100%" height="100%" xmlns="http://www.w3.org/2000/svg"> | ||
| <defs> | ||
| <pattern id="bg-grid" width="30" height="30" patternUnits="userSpaceOnUse" patternTransform={transformation}> | ||
| <g opacity={svgPatternOpacity} fill={svgPatternColor}> | ||
| <polygon points="29.6,0 27,0 27,0.4 29.6,0.4 29.6,3 30,3 30,0.4 30,0 " /> | ||
| <polygon points="0,0 0,0.4 0,3 0.4,3 0.4,0.4 3,0.4 3,0 0.4,0 " /> | ||
| <polygon points="30,30 30,29.6 30,27 29.6,27 29.6,29.6 27,29.6 27,30 29.6,30 " /> | ||
| <polygon points="0.4,30 3,30 3,29.6 0.4,29.6 0.4,27 0,27 0,29.6 0,30 " /> | ||
| </g> | ||
| </pattern> | ||
|
|
||
| </defs> | ||
| <rect width="100%" height="100%" fill="url(#bg-grid)" /> | ||
| </svg> | ||
| ); | ||
| }; | ||
|
|
||
| BackgroundGrid.propTypes = { | ||
| svgPatternColor: PropTypes.string, | ||
| svgPatternOpacity: PropTypes.number, | ||
| translateX: PropTypes.number, | ||
| translateY: PropTypes.number, | ||
| scale: PropTypes.number, | ||
| }; | ||
|
|
||
| BackgroundGrid.defaultProps = { | ||
| svgPatternColor: 'black', | ||
| svgPatternOpacity: 0.5, | ||
| translateX: 0, | ||
| translateY: 0, | ||
| scale: 1, | ||
| }; | ||
|
|
||
| export default React.memo(BackgroundGrid); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| import React, { useMemo, useRef } from 'react'; | ||
| import PropTypes from 'prop-types'; | ||
| import classNames from 'classnames'; | ||
| import useCanvasPan from './useCanvasPan'; | ||
| import useCanvasZoom from './useCanvasZoom'; | ||
| import BackgroundGrid from './BackgroundGrid'; | ||
|
|
||
| import './canvas.scss'; | ||
|
|
||
| const makeStyle = (scale = 1, { x = 0, y = 0 }) => ({ | ||
| transform: `translate(${x}px, ${y}px) translateZ(0) scale(${scale})`, | ||
| }); | ||
|
|
||
| /** | ||
| * @TODO: Document this component | ||
| */ | ||
| const Canvas = (props) => { | ||
| const { | ||
| initialZoom, maxZoom, minZoom, zoomable, pannable, zoomOnWheel, inertia, debug, children, className, | ||
| ElementRenderer, GridRenderer, ...rest | ||
| } = props; | ||
| const elRef = useRef(); | ||
| const [pan, startPan] = useCanvasPan({ pannable, inertia }); | ||
| const [scale] = useCanvasZoom(elRef, { initialZoom, maxZoom, minZoom, zoomable, zoomOnWheel }); | ||
| const classList = useMemo(() => classNames('bi bi-diagram bi-diagram-canvas', className), [className]); | ||
| const style = useMemo(() => makeStyle(scale, pan), [scale, pan.x, pan.y]); | ||
|
|
||
| return ( | ||
| <ElementRenderer className={classList} onMouseDown={startPan} onTouchStart={startPan} ref={elRef} {...rest}> | ||
| <GridRenderer translateX={pan.x} translateY={pan.y} scale={scale} /> | ||
| <div className="bi-canvas-content" style={style}> | ||
| {children} | ||
| </div> | ||
| {debug && ( | ||
| <div className="bi-canvas-debugger"> | ||
| <p>{JSON.stringify(pan)}</p> | ||
| <p>{`Scale: ${scale}`}</p> | ||
| </div> | ||
| )} | ||
| </ElementRenderer> | ||
| ); | ||
| }; | ||
|
|
||
| Canvas.propTypes = { | ||
| zoomable: PropTypes.bool, | ||
| pannable: PropTypes.bool, | ||
| initialZoom: PropTypes.number, | ||
| zoomOnWheel: PropTypes.bool, | ||
| maxZoom: PropTypes.number, | ||
| minZoom: PropTypes.number, | ||
| inertia: PropTypes.bool, | ||
| debug: PropTypes.bool, | ||
| GridRenderer: PropTypes.elementType, | ||
| ElementRenderer: PropTypes.elementType, | ||
| }; | ||
|
|
||
| Canvas.defaultProps = { | ||
| zoomable: true, | ||
| pannable: true, | ||
| initialZoom: 1, | ||
| zoomOnWheel: true, | ||
| maxZoom: 5, | ||
| minZoom: 0.4, | ||
| inertia: true, | ||
| debug: false, | ||
| GridRenderer: BackgroundGrid, | ||
| ElementRenderer: 'div', | ||
| }; | ||
|
|
||
| export default React.memo(Canvas); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| ``` | ||
| import { Canvas } from 'beautiful-react-diagrams'; | ||
| <div style={{ height: '30rem' }}> | ||
| <Canvas debug> | ||
| <p>Element</p> | ||
| </Canvas> | ||
| </div> | ||
| ``` |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| .bi.bi-diagram.bi-diagram-canvas { | ||
| position: relative; | ||
| width: 100%; | ||
| height: 100%; | ||
| top: 0; | ||
| left: 0; | ||
| right: 0; | ||
| bottom: 0; | ||
| overflow: hidden; | ||
| background: #fbfaf9; | ||
| border: 0.07rem solid rgba(0, 0, 0, 0.2); | ||
| cursor: move; /* fallback if grab cursor is unsupported */ | ||
| cursor: grab; | ||
|
|
||
| &:active { | ||
| cursor: grabbing; | ||
| } | ||
|
|
||
| .bi-canvas-content { | ||
| position: absolute; | ||
| top: 0; | ||
| left: 0; | ||
| right: 0; | ||
| bottom: 0; | ||
| } | ||
|
|
||
| .bi-canvas-debugger { | ||
| max-width: 24rem; | ||
| height: 3rem; | ||
| position: absolute; | ||
| bottom: 0; | ||
| right: 0; | ||
| background: rgba(0, 0, 0, 0.1); | ||
|
|
||
| p { | ||
| margin: 0; | ||
| } | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| export { default } from './Canvas'; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| import { useState, useCallback, useRef } from 'react'; | ||
| import Events from '../../shared/Events'; | ||
| import { isTouch } from '../../shared/Constants'; | ||
|
|
||
| const initialState = { x: 0, y: 0 }; | ||
| const friction = 0.8; // TODO: document this stuff | ||
| const getMouseEventPoint = (e) => ({ x: e.pageX, y: e.pageY }); | ||
| const getTouchEventPoint = (e) => getMouseEventPoint(e.changedTouches[0]); | ||
| const getEventPoint = isTouch ? getTouchEventPoint : getMouseEventPoint; | ||
| const getDelta = (point, lastPoint) => ({ x: lastPoint.x - point.x, y: lastPoint.y - point.y }); | ||
| const applyInertia = (value) => (Math.abs(value) >= 0.5 ? Math.trunc(value * friction) : 0); | ||
|
|
||
| /** | ||
| * TODO: document this thing | ||
| * Inspired by this article: | ||
| * https://jclem.net/posts/pan-zoom-canvas-react?utm_campaign=building-a-pannable--zoomable-canvasdi | ||
| */ | ||
| const useCanvasPan = ({ pannable, inertia }) => { | ||
| const [pan, setPan] = useState(initialState); | ||
| const lastPointRef = useRef(initialState); | ||
| const deltaRef = useRef({ x: null, y: null }); | ||
|
|
||
| // TODO: document this callback | ||
| const performPan = useCallback((event) => { | ||
| if (pannable) { | ||
| const lastPoint = { ...lastPointRef.current }; | ||
| const point = getEventPoint(event); | ||
| lastPointRef.current = point; | ||
| setPan(({ x, y }) => { | ||
| const delta = getDelta(lastPoint, point); | ||
| deltaRef.current = { ...delta }; | ||
|
|
||
| return { x: x + delta.x, y: y + delta.y }; | ||
| }); | ||
| } | ||
| }, []); | ||
|
|
||
| // TODO: document this callback | ||
| const performInertia = useCallback(() => { | ||
| if (inertia) { | ||
| setPan(({ x, y }) => ({ x: x + deltaRef.current.x, y: y + deltaRef.current.y })); | ||
|
|
||
| deltaRef.current.x = applyInertia(deltaRef.current.x); | ||
| deltaRef.current.y = applyInertia(deltaRef.current.y); | ||
|
|
||
| if (Math.abs(deltaRef.current.x) > 0 || Math.abs(deltaRef.current.y) > 0) { | ||
| requestAnimationFrame(performInertia); | ||
| } | ||
| } | ||
| }, [inertia, deltaRef.current.x, deltaRef.current.y]); | ||
|
|
||
| // TODO: document this callback | ||
| const endPan = useCallback(() => { | ||
| if (pannable) { | ||
| document.removeEventListener(Events.MOUSE_MOVE, performPan); | ||
| document.removeEventListener(Events.MOUSE_END, endPan); | ||
|
|
||
| if (inertia) { | ||
| requestAnimationFrame(performInertia); | ||
| } | ||
| } | ||
| }, [performPan]); | ||
|
|
||
| // TODO: document this callback | ||
| const onPanStart = useCallback((event) => { | ||
| if (pannable) { | ||
| document.addEventListener(Events.MOUSE_MOVE, performPan); | ||
| document.addEventListener(Events.MOUSE_END, endPan); | ||
| lastPointRef.current = getEventPoint(event); | ||
| } | ||
| }, [performPan, endPan]); | ||
|
|
||
| return [pan, onPanStart]; | ||
| }; | ||
|
|
||
| export default useCanvasPan; |
Oops, something went wrong.