@jiaminghi/c-render
Advanced tools
$ npm install @jiaminghi/c-render
Detailed documents and examples can be viewed on the HomePage.
import CRender from '@jiaminghi/c-redner'
const canvas = document.getElementById('canvas')
// Instantiate CRender
const render = new CRender(canvas)
// Add graph to render
const circle = render.add({ name: 'circle', ... })
/**
* @description Class of CRender
* @param {Object} canvas Canvas DOM
* @return {CRender} Instance of CRender
*/
class CRender {
// ...
}
/**
* @description Context of the canvas
* @type {Object}
* @example ctx = canvas.getContext('2d')
*/
/**
* @description Width and height of the canvas
* @type {Array}
* @example area = [300，100]
*/
/**
* @description Whether render is in animation rendering
* @type {Boolean}
* @example animationStatus = true|false
*/
/**
* @description Added graph
* @type {[Graph]}
* @example graphs = [Graph, Graph, ...]
*/
/**
* @description Color plugin
* @type {Object}
*/
/**
* @description Bezier Curve plugin
* @type {Object}
*/
Add graph to render.
Delete graph in render.
Delete all graph in render.
Draw all the graphs in the render.
Clear canvas drawing area.
Animate the graph whose animation queue is not empty and the animationPause is equal to false.
/**
* @description Add graph to render
* @param {Object} config Graph configuration
* @return {Graph} Graph instance
*/
CRender.prototype.add = function (config = {}) {
// ...
}
/**
* @description Delete graph in render
* @param {Graph} graph The graph to be deleted
* @return {Undefined} Void
*/
CRender.prototype.delGraph = function (graph) {
// ...
}
/**
* @description Delete all graph in render
* @return {Undefined} Void
*/
CRender.prototype.delAllGraph = function () {
// ...
}
/**
* @description Draw all the graphs in the render
* @return {Undefined} Void
*/
CRender.prototype.drawAllGraph = function () {
// ...
}
/**
* @description Clear canvas drawing area
* @return {Undefined} Void
*/
CRender.prototype.clearArea = function () {
// ...
}
/**
* @description Animate the graph whose animation queue is not empty
* and the animationPause is equal to false
* @return {Promise} Animation Promise
*/
CRender.prototype.launchAnimation = function () {
// ...
}
When adding a graph, you can configure them.
/**
* @description Weather to render graph
* @type {Boolean}
* @default visible = true
*/
/**
* @description Graph shape data
* @type {Object}
*/
/**
* @description Graph style data (Instance of Style)
* @type {Style}
*/
/**
* @description Whether to enable drag
* @type {Boolean}
* @default drag = false
*/
/**
* @description Whether to enable hover
* @type {Boolean}
* @default hover = false
*/
/**
* @description Graph rendering index
* Give priority to index high graph in rendering
* @type {Number}
* @default index = 1
*/
/**
* @description Animation delay time(ms)
* @type {Number}
* @default animationDelay = 0
*/
/**
* @description Number of animation frames
* @type {Number}
* @default animationFrame = 30
*/
/**
* @description Animation dynamic curve
* @type {String}
* @default animationCurve = 'linear'
*/
/**
* @description Weather to pause graph animation
* @type {Boolean}
* @default animationPause = false
*/
/**
* @description Rectangular hover detection zone
* Use this method for hover detection first
* @type {Null|Array}
* @default hoverRect = null
* @example hoverRect = [0, 0, 100, 100] // [Rect start x, y, Rect width, height]
*/
/**
* @description Mouse enter event handler
* @type {Function|Null}
* @default mouseEnter = null
*/
/**
* @description Mouse outer event handler
* @type {Function|Null}
* @default mouseOuter = null
*/
/**
* @description Mouse click event handler
* @type {Function|Null}
* @default click = null
*/
Enable mouseEnter, mouseOuter, click event support requires configuring the hover property of the graph to true. Extended new graph require the hoverCheck method to be configured to provide event support.
Update graph state.
Update graphics state (with animation).
Skip to the last frame of animation.
Pause animation behavior.
Try animation behavior.
/**
* @description Update graph state
* @param {String} attrName Updated attribute name
* @param {Any} change Updated value
* @return {Undefined} Void
*/
Graph.prototype.attr = function (attrName, change = undefined) {
// ...
}
/**
* @description Update graphics state (with animation)
* Only shape and style attributes are supported
* @param {String} attrName Updated attribute name
* @param {Any} change Updated value
* @param {Boolean} wait Whether to store the animation waiting
* for the next animation request
* @return {Promise} Animation Promise
*/
Graph.prototype.animation = async function (attrName, change, wait = false) {
// ...
}
/**
* @description Skip to the last frame of animation
* @return {Undefined} Void
*/
Graph.prototype.animationEnd = function () {
// ...
}
/**
* @description Pause animation behavior
* @return {Undefined} Void
*/
Graph.prototype.pauseAnimation = function () {
// ...
}
/**
* @description Try animation behavior
* @return {Undefined} Void
*/
Graph.prototype.playAnimation = function () {
// ...
}
When you add graph to the render, you can configure the following functions in the configuration, they will be called at a specific time.
The current graph instance will be passed in as a parameter,and the mousemove event will also be passed to beforeMove and moved.
/**
* @description Rgba value of graph fill color
* @type {Array}
* @default fill = [0, 0, 0, 1]
*/
/**
* @description Rgba value of graph stroke color
* @type {Array}
* @default stroke = [0, 0, 0, 1]
*/
/**
* @description Opacity of graph
* @type {Number}
* @default opacity = 1
*/
/**
* @description LineCap of Ctx
* @type {String}
* @default lineCap = null
* @example lineCap = 'butt'|'round'|'square'
*/
/**
* @description Linejoin of Ctx
* @type {String}
* @default lineJoin = null
* @example lineJoin = 'round'|'bevel'|'miter'
*/
/**
* @description LineDash of Ctx
* @type {Array}
* @default lineDash = null
* @example lineDash = [10, 10]
*/
/**
* @description LineDashOffset of Ctx
* @type {Number}
* @default lineDashOffset = null
* @example lineDashOffset = 10
*/
/**
* @description ShadowBlur of Ctx
* @type {Number}
* @default shadowBlur = 0
*/
/**
* @description Rgba value of graph shadow color
* @type {Array}
* @default shadowColor = [0, 0, 0, 0]
*/
/**
* @description ShadowOffsetX of Ctx
* @type {Number}
* @default shadowOffsetX = 0
*/
/**
* @description ShadowOffsetY of Ctx
* @type {Number}
* @default shadowOffsetY = 0
*/
/**
* @description LineWidth of Ctx
* @type {Number}
* @default lineWidth = 0
*/
/**
* @description Stroke width is not scaled
* @type {Boolean}
* @default strokeNoScale = false
*/
/**
* @description Center point of the graph
* @type {Array}
* @default graphCenter = null
* @example graphCenter = [10, 10]
*/
/**
* @description Graph scale
* @type {Array}
* @default scale = null
* @example scale = [1.5, 1.5]
*/
/**
* @description Graph rotation degree
* @type {Number}
* @default rotate = null
* @example rotate = 10
*/
/**
* @description Graph translate distance
* @type {Array}
* @default translate = null
* @example translate = [10, 10]
*/
/**
* @description Cursor status when hover
* @type {String}
* @default hoverCursor = 'pointer'
* @example hoverCursor = 'default'|'pointer'|'auto'|'crosshair'|'move'|'wait'|...
*/
/**
* @description Font style of Ctx
* @type {String}
* @default fontStyle = 'normal'
* @example fontStyle = 'normal'|'italic'|'oblique'
*/
/**
* @description Font varient of Ctx
* @type {String}
* @default fontVarient = 'normal'
* @example fontVarient = 'normal'|'small-caps'
*/
/**
* @description Font weight of Ctx
* @type {String|Number}
* @default fontWeight = 'normal'
* @example fontWeight = 'normal'|'bold'|'bolder'|'lighter'|Number
*/
/**
* @description Font size of Ctx
* @type {Number}
* @default fontSize = 10
*/
/**
* @description Font family of Ctx
* @type {String}
* @default fontFamily = 'Arial'
*/
/**
* @description TextAlign of Ctx
* @type {String}
* @default textAlign = 'center'
* @example textAlign = 'start'|'end'|'left'|'right'|'center'
*/
/**
* @description TextBaseline of Ctx
* @type {String}
* @default textBaseline = 'middle'
* @example textBaseline = 'top'|'bottom'|'middle'|'alphabetic'|'hanging'
*/
CRender provides some basic vector graph, examples are as follows.
| Attribute name | Type | Default | Annotation |
|---|---|---|---|
| rx | Number | 0 | Center x-axis coordinate. |
| ry | Number | 0 | Center r-axis coordinate. |
| r | Number | 0 | Circle radius. |
const { area: [w, h] } = render
const circleConfig = {
name: 'circle',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
rx: w / 2,
ry: h / 2,
r: 50
},
style: {
fill: '#9ce5f4',
shadowBlur: 0,
shadowColor: '#66eece',
hoverCursor: 'pointer'
},
mouseEnter (e) {
this.animation('shape', { r: 70 }, true)
this.animation('style', { shadowBlur: 20 })
},
mouseOuter (e) {
this.animation('shape', { r: 50 }, true)
this.animation('style', { shadowBlur: 0 })
}
}
const circle = render.add(circleConfig)
| Attribute name | Type | Default | Annotation |
|---|---|---|---|
| rx | Number | 0 | Center x-axis coordinate. |
| ry | Number | 0 | Center y-axis coordinate. |
| hr | Number | 0 | Horizontal axis radius. |
| vr | Number | 0 | Vertical axis radius. |
const { area: [w, h] } = render
const ellipseConfig = {
name: 'ellipse',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
rx: w / 2,
ry: h / 2,
hr: 80,
vr: 30
},
style: {
fill: '#9ce5f4',
shadowBlur: 0,
shadowColor: '#66eece',
scale: [1, 1],
hoverCursor: 'pointer'
},
mouseEnter (e) {
this.animation('style', { scale: [1.5, 1.5], shadowBlur: 20 })
},
mouseOuter (e) {
this.animation('style', { scale: [1, 1], shadowBlur: 0 })
}
}
const ellipse = render.add(ellipseConfig)
| Attribute name | Type | Default | Annotation |
|---|---|---|---|
| x | Number | 0 | The x coordinate of the top left corner of the rectangle. |
| y | Number | 0 | The y coordinate of the top left corner of the rectangle. |
| w | Number | 0 | Rectangle width. |
| h | Number | 0 | Rectangle height. |
const { area: [w, h] } = render
const rectConfig = {
name: 'rect',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
x: w / 2 - rectWidth / 2,
y: h / 2 - rectHeight / 2,
w: rectWidth,
h: rectHeight
},
style: {
fill: '#9ce5f4',
shadowBlur: 0,
shadowColor: '#66eece',
hoverCursor: 'pointer',
translate: [0, 0]
},
mouseEnter (e) {
this.animation('shape', { w: 400 }, true)
this.animation('style', { shadowBlur: 20, translate: [-100, 0] })
},
mouseOuter (e) {
this.animation('shape', { w: 200 }, true)
this.animation('style', { shadowBlur: 0, translate: [0, 0] })
}
}
const rect = render.add(rectConfig)
| Attribute name | Type | Default | Annotation |
|---|---|---|---|
| rx | Number | 0 | Center x-axis coordinate. |
| ry | Number | 0 | Center y-axis coordinate. |
| r | Number | 0 | Ring radius. |
const { area: [w, h] } = render
const ringConfig = {
name: 'ring',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
rx: w / 2,
ry: h / 2,
r: 50
},
style: {
stroke: '#9ce5f4',
lineWidth: 20,
hoverCursor: 'pointer',
shadowBlur: 0,
shadowColor: '#66eece'
},
mouseEnter (e) {
this.animation('style', { shadowBlur: 20, lineWidth: 30 })
},
mouseOuter (e) {
this.animation('style', { shadowBlur: 0, lineWidth: 20 })
}
}
const ring = render.add(ringConfig)
| Attribute name | Type | Default | Annotation |
|---|---|---|---|
| rx | Number | 0 | Center x-axis coordinate. |
| ry | Number | 0 | Center y-axis coordinate. |
| r | Number | 0 | Arc radius. |
| startAngle | Number | 0 | Arc start angle. |
| endAngle | Number | 0 | Arc end angle. |
| clockWise | Boolean | true | Clockwise |
const { area: [w, h] } = render
const arcConfig = {
name: 'arc',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
rx: w / 2,
ry: h / 2,
r: 60,
startAngle: 0,
endAngle: Math.PI / 3
},
style: {
stroke: '#9ce5f4',
lineWidth: 20,
shadowBlur: 0,
rotate: 0,
shadowColor: '#66eece',
hoverCursor: 'pointer'
},
mouseEnter (e) {
this.animation('shape', { endAngle: Math.PI }, true)
this.animation('style', { shadowBlur: 20, rotate: -30, lineWidth: 30 })
},
mouseOuter (e) {
this.animation('shape', { endAngle: Math.PI / 3 }, true)
this.animation('style', { shadowBlur: 0, rotate: 0, lineWidth: 20 })
}
}
const arc = render.add(arcConfig)
| Attribute name | Type | Default | Annotation |
|---|---|---|---|
| rx | Number | 0 | Center x-axis coordinate. |
| ry | Number | 0 | Center y-axis coordinate. |
| r | Number | 0 | Sector radius. |
| startAngle | Number | 0 | Sector start angle. |
| endAngle | Number | 0 | Sector end angle. |
| clockWise | Boolean | true | Clockwise |
const { area: [w, h] } = render
const sectorConfig = {
name: 'sector',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
rx: w / 2,
ry: h / 2,
r: 60,
startAngle: 0,
endAngle: Math.PI / 3
},
style: {
fill: '#9ce5f4',
shadowBlur: 0,
rotate: 0,
shadowColor: '#66eece',
hoverCursor: 'pointer'
},
mouseEnter (e) {
this.animation('shape', { endAngle: Math.PI, r: 70 }, true)
this.animation('style', { shadowBlur: 20, rotate: -30, lineWidth: 30 })
},
mouseOuter (e) {
this.animation('shape', { endAngle: Math.PI / 3, r: 60 }, true)
this.animation('style', { shadowBlur: 0, rotate: 0, lineWidth: 20 })
}
}
const sector = render.add(sectorConfig)
| Attribute name | Type | Default | Annotation |
|---|---|---|---|
| rx | Number | 0 | Center x-axis coordinate. |
| ry | Number | 0 | Center y-axis coordinate. |
| r | Number | 0 | Circumradius. |
| side | Number | 0 | Edge number. |
const { area: [w, h] } = render
const regPolygonConfig = {
name: 'regPolygon',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
rx: w / 2,
ry: h / 2,
r: 60,
side: 6
},
style: {
fill: '#9ce5f4',
hoverCursor: 'pointer',
shadowBlur: 0,
rotate: 0,
shadowColor: '#66eece'
},
mouseEnter (e) {
this.animation('shape', { endAngle: Math.PI, r: 100 }, true)
this.animation('style', { shadowBlur: 20, rotate: 180 })
},
mouseOuter (e) {
this.animation('shape', { endAngle: Math.PI / 3, r: 60 }, true)
this.animation('style', { shadowBlur: 0, rotate: 0 })
}
}
const regPolygon = render.add(regPolygonConfig)
| Attribute name | Type | Default | Annotation |
|---|---|---|---|
| points | Array | [] | The points that makes up the polyline. |
| close | Boolean | false | Whether to close the polyline. |
const { area: [w, h] } = render
const top = h / 3
const bottom = h / 3 * 2
const gap = w / 10
const beginX = w / 2 - gap * 2
const points = new Array(5).fill('').map((t, i) =>
[beginX + gap * i, i % 2 === 0 ? top : bottom])
const polylineConfig = {
name: 'polyline',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
points
},
style: {
stroke: '#9ce5f4',
shadowBlur: 0,
lineWidth: 10,
shadowColor: '#66eece',
hoverCursor: 'pointer'
},
mouseEnter (e) {
this.animation('style', { lineWidth: 20, shadowBlur: 20 })
},
mouseOuter (e) {
this.animation('style', { lineWidth: 10, shadowBlur: 0 })
}
}
const polyline = render.add(polylineConfig)
const { area: [w, h] } = render
const top = h / 3
const bottom = h / 3 * 2
const gap = w / 10
const beginX = w / 2 - gap * 2
const points = new Array(5).fill('').map((t, i) =>
[beginX + gap * i, i % 2 === 0 ? top : bottom])
points[2][1] += top * 1.3
const polylineClosedConfig = {
name: 'polyline',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
points,
close: true
},
style: {
fill: '#9ce5f4',
shadowBlur: 0,
lineWidth: 10,
shadowColor: '#66eece',
hoverCursor: 'pointer'
},
mouseEnter (e) {
this.animation('style', { shadowBlur: 20 }, true)
const pointsCloned = deepClone(this.shape.points)
pointsCloned[2][1] += top * 0.3
this.animation('shape', { points: pointsCloned })
},
mouseOuter (e) {
this.animation('style', { shadowBlur: 0 }, true)
const pointsCloned = deepClone(this.shape.points)
pointsCloned[2][1] -= top * 0.3
this.animation('shape', { points: pointsCloned })
}
}
const polylineClosed = render.add(polylineClosedConfig)
| Attribute name | Type | Default | Annotation |
|---|---|---|---|
| points | Array | [] | The points that makes up the smoothline. |
| close | Boolean | false | Whether to close the smoothline. |
const { area: [w, h] } = render
const top = h / 3
const bottom = h / 3 * 2
const gap = w / 10
const beginX = w / 2 - gap * 2
const points = new Array(5).fill('').map((t, i) =>
[beginX + gap * i, i % 2 === 0 ? top : bottom])
const smoothlineConfig = {
name: 'smoothline',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
points
},
style: {
stroke: '#9ce5f4',
shadowBlur: 0,
lineWidth: 10,
shadowColor: '#66eece',
hoverCursor: 'pointer'
},
mouseEnter (e) {
this.animation('style', { lineWidth: 20, shadowBlur: 20 })
},
mouseOuter (e) {
this.animation('style', { lineWidth: 10, shadowBlur: 0 })
}
}
const smoothline = render.add(smoothlineConfig)
import { getCircleRadianPoint } from '../../CRender/lib/util'
function getPoints (radius, centerPoint, pointNum) {
const PIDived = Math.PI * 2 / pointNum
const points = new Array(pointNum).fill('')
.map((foo, i) =>
getCircleRadianPoint(...centerPoint, radius, PIDived * i)
)
return points
}
const { area: [w, h] } = render
const radius = h / 3
const centerPoint = [w / 2, h / 2]
const smoothlineClosedConfig = {
name: 'smoothline',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
points: getPoints(radius, centerPoint, 3),
close: true
},
style: {
fill: '#9ce5f4',
shadowBlur: 0,
lineWidth: 10,
shadowColor: '#66eece',
hoverCursor: 'pointer'
},
mouseEnter (e) {
this.animation('style', { lineWidth: 20, shadowBlur: 20, rotate: 120 })
},
mouseOuter (e) {
this.animation('style', { lineWidth: 10, shadowBlur: 0, rotate: 0 })
},
setGraphCenter (e, { style }) {
if (e) {
const { movementX, movementY } = e
const [cx, cy] = style.graphCenter
style.graphCenter = [cx + movementX, cy + movementY]
} else {
style.graphCenter = [...centerPoint]
}
}
}
const smoothlineClosed = render.add(smoothlineClosedConfig)
| Attribute name | Type | Default | Annotation |
|---|---|---|---|
| points | Array | [] | The points that makes up the bezierCurve. |
| close | Boolean | false | Whether to close the smoothline. |
const { area: [w, h] } = render
const offsetX = w / 2
const offsetY = h / 2
const points = [
// Start point
[-100 + offsetX, -50 + offsetY],
// Multiple sets of bezier curve
[
// controlPoint1,controlPoint2,endPoint
[0 + offsetX, -50 + offsetY],
[0 + offsetX, 50 + offsetY],
[100 + offsetX, 50 + offsetY]
],
// [...],[...]
]
const bezierCurveConfig = {
name: 'bezierCurve',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
points
},
style: {
lineWidth: 10,
stroke: '#9ce5f4',
shadowBlur: 0,
shadowColor: '#66eece',
hoverCursor: 'pointer'
},
mouseEnter (e) {
this.animation('style', { lineWidth: 20, shadowBlur: 20 })
},
mouseOuter (e) {
this.animation('style', { lineWidth: 10, shadowBlur: 0 })
}
}
const bezierCurve = render.add(bezierCurveConfig)
import { getCircleRadianPoint } from '../../CRender/lib/util'
function getPetalPoints (insideRadius, outsideRadius, petalNum, petalCenter) {
const PI2Dived = Math.PI * 2 / (petalNum * 3)
let points = new Array(petalNum * 3).fill('')
.map((foo, i) =>
getCircleRadianPoint(...petalCenter,
i % 3 === 0 ? insideRadius : outsideRadius,
PI2Dived * i)
)
const startPoint = points.shift()
points.push(startPoint)
points = new Array(petalNum).fill('')
.map(foo => points.splice(0, 3))
points.unshift(startPoint)
return points
}
const { area: [w, h] } = render
const petalCenter = [w / 2, h / 2]
const [raidus1, raidus2, raidus3, raidus4] = [h / 6, h / 2.5, h / 3, h / 2]
const bezierCurveClosedConfig = {
name: 'bezierCurve',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
shape: {
points: getPetalPoints(raidus1, raidus2, 6, petalCenter),
close: true
},
style: {
fill: '#9ce5f4',
shadowBlur: 0,
shadowColor: '#66eece',
hoverCursor: 'pointer'
},
mouseEnter (e, { style: { graphCenter } }) {
this.animation('style', { lineWidth: 20, shadowBlur: 20 }, true)
this.animation('shape', { points: getPetalPoints(raidus3, raidus4, 6, graphCenter) })
},
mouseOuter (e, { style: { graphCenter } }) {
this.animation('style', { lineWidth: 10, shadowBlur: 0 }, true)
this.animation('shape', { points: getPetalPoints(raidus1, raidus2, 6, graphCenter) })
},
setGraphCenter (e, { style }) {
if (e) {
const { movementX, movementY } = e
const [cx, cy] = style.graphCenter
style.graphCenter = [cx + movementX, cy + movementY]
} else {
style.graphCenter = [...petalCenter]
}
}
}
const bezierCurveClosed = render.add(bezierCurveClosedConfig)
| Attribute name | Type | Default | Annotation |
|---|---|---|---|
| content | String | '' | Text content. |
| position | Array | [0, 0] | Text start position. |
| maxWidth | Number | Undefined | Maximum width of the text. |
const { area: [w, h] } = render
const centerPoint = [w / 2, h / 2]
const hoverRect = [w / 2 - 100, h / 2 - 30 ,200, 60]
const textConfig = {
name: 'text',
animationCurve: 'easeOutBack',
hover: true,
drag: true,
hoverRect,
shape: {
content: 'CRender',
position: centerPoint,
maxWidth: 200
},
style: {
fill: '#9ce5f4',
fontSize: 50,
shadowBlur: 0,
rotate: 0,
shadowColor: '#66eece',
hoverCursor: 'pointer',
scale: [1, 1],
rotate: 0
},
mouseEnter (e) {
this.animation('style', { shadowBlur: 20, scale: [1.5, 1.5], rotate: 30 })
},
mouseOuter (e) {
this.animation('style', { shadowBlur: 0, scale: [1, 1], rotate: 0 })
},
moved (e, { hoverRect }) {
const { movementX, movementY } = e
hoverRect[0] += movementX
hoverRect[1] += movementY
}
}
const text = render.add(textConfig)
Graph of text should be configured with hoverRect to support mouse events.
CRender provides a Function to extend new graph,you can customize the graphics you want.
import { extendNewGraph } from '@jiaminghi/c-render'
const graphName = 'newGraph'
const graphConfig = {
shape: { ... },
// ...
}
extendNewGraph(graphName, graphConfig)
/**
* @description Extend new graph
* @param {String} name Name of Graph
* @param {Object} config Configuration of Graph
* @return {Undefined} Void
*/
function extendNewGraph (name, config) {
// ...
}
/**
* @type {Object}
* @description Graph shape data
*/
/**
* @type {Function}
* @description Graph configuration check
* Automatically invoked when the graph is added,
* and when the return value is false,
* the add behavior is terminated
* @param {Graph} Current graph instance
* @return {Boolean} Whether the configuration is legal
*/
/**
* @type {Function}
* @description Graph plotter
* @param {CRender} Current CRender instance
* @param {Graph} Current graph instance
* @return {Undefined} Void
*/
/**
* @type {Function}
* @description According to the mouse event to detect
* whether the current graphics are in the hover state,
* support for mouseEnter, mouseOuter, drag, click
* @param {[Number]} Position of mouse
* @param {Graph} Current graph instance
* @return {Boolean} Whether it is in hover
*/
/**
* @type {Function}
* @description Set the center point of the graph to
* support rotate, scale and translate.
* Add graph and drag behavior will be called.
* @param {Event} Mouse move Event (Called when adding a graphic, the value is null)
* @param {Graph} Current graph instance
* @return {Undefined} Void
*/
/**
* @type {Function}
* @description Moving graph,support for drag
* @param {Event} Mouse move Event
* @param {Graph} Current graph instance
* @return {Undefined} Void
*/
import { extendNewGraph } from '@jiaminghi/c-render'
const circle = {
shape: {
rx: 0,
ry: 0,
r: 0
},
validator ({ shape }) {
const { rx, ry, r } = shape
if (typeof rx !== 'number' || typeof ry !== 'number' || typeof r !== 'number') {
console.error('Shape configuration is abnormal!')
return false
}
return true
},
draw ({ ctx }, { shape }) {
ctx.beginPath()
const { rx, ry, r } = shape
ctx.arc(rx, ry, r, 0, Math.PI * 2)
ctx.fill()
ctx.stroke()
ctx.closePath()
},
hoverCheck (position, { shape }) {
const { rx, ry, r } = shape
return checkPointIsInCircle(rx, ry, r, position)
},
setGraphCenter (e, { shape, style }) {
const { rx, ry } = shape
style.graphCenter = [rx, ry]
},
move ({ movementX, movementY }, { shape }) {
this.attr('shape', {
rx: shape.rx + movementX,
ry: shape.ry + movementY
})
}
}
extendNewGraph('circle', circle)
Provide animation transition data(animationCurve).
If you want to extend the new animation curve, you can use the method provided by transition.
import { injectNewCurve } from '@jiaminghi/c-render'
injectNewCurve('newCurve', curveData)
Provides support for bezierCurve, such as curve length calculation, conversion between curve and polyline.
Provides calculation of color values.
FAQs
Canvas-based vector graphics rendering plugin
The npm package @jiaminghi/c-render receives a total of 1,748 weekly downloads. As such, @jiaminghi/c-render popularity was classified as popular.
We found that @jiaminghi/c-render demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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