gxt_app/uni_modules/tui-xechars/libs/charts.uts

import { TuiDrawCharts } from './xcharts'
export class TuiCharts {
	chartsMap = new Map<number, TuiDrawCharts>()
	option : UTSJSONObject = {}
	canvasContext : CanvasContext | null = null
	context : CanvasRenderingContext2D | null = null
	dpr : number = uni.getWindowInfo().pixelRatio
	offsetWidth : number = 0
	offsetHeight : number = 0
	ins : ComponentPublicInstance | null = null
	setSize : boolean = false
	baseX : number = 0
	baseY : number = 0
	oldTipsName : number = -1
	canvasRect : DOMRect | null = null
	constructor() { }
	getTouchCurrent(e : UniEvent) : number {
		let curArea : number = -1
		let x : number
		let y : number
		const top = this.canvasRect!.y
		const left = this.canvasRect!.x
		if (e.type == 'click') {
			x = (e as UniPointerEvent).clientX - this.baseX + (this.baseX - left)
			y = (e as UniPointerEvent).clientY - this.baseY + (this.baseY - top)
		} else {
			x = (e as UniTouchEvent).changedTouches[0].clientX - this.baseX + (this.baseX - left)
			y = (e as UniTouchEvent).changedTouches[0].clientY - this.baseY + (this.baseY - top)
		}

		this.chartsMap.forEach((item : TuiDrawCharts, key : number) => {
			if (x > item.opts.xOffset && y > item.opts.yOffset && x < item.opts.xOffset + item.opts.width && y < item.opts.yOffset + item.opts.height) {
				curArea = key
			}
		})
		return curArea
	}
	tap(e : UniPointerEvent) {
		if (this.oldTipsName != -1) {
			const curDraw = this.getDrawCharts(this.oldTipsName)!
			curDraw.opts.DOMRect = this.canvasRect
			const tipsIndex = curDraw.showToolTip(e)
			let legendIndex = -1
			if (curDraw.opts.tapLegend) legendIndex = curDraw.touchLegend(e)
			this.ins?.$emit('select', { tipsIndex, legendIndex, index: this.oldTipsName })
		}
	}
	touchStart(e : UniTouchEvent) {
		e.target!.getBoundingClientRectAsync()!.then((res : DOMRect) => {
			this.canvasRect = res
			const curBar = this.getTouchCurrent(e)
			if (curBar != -1) {
				if (curBar != this.oldTipsName && this.oldTipsName != -1) {
					const oldDraw = this.getDrawCharts(this.oldTipsName)!
					oldDraw.opts.DOMRect = null
					oldDraw.clearTooltip()
				}
				this.oldTipsName = curBar
				const curDraw = this.getDrawCharts(this.oldTipsName)!
				if (curDraw.opts.enableScroll) {
					curDraw.opts.DOMRect = res
					curDraw.scrollStart(e)
				}
			}
		})
	}
	touchMove(e : UniTouchEvent) {
		if (this.oldTipsName != -1) {
			const curDraw = this.getDrawCharts(this.oldTipsName)!
			if (curDraw.opts.enableScroll) {
				curDraw.scroll(e)
			}
		}
	}
	touchEnd(e : UniTouchEvent) {
		if (this.oldTipsName != -1) {
			const curDraw = this.getDrawCharts(this.oldTipsName)!
			if (curDraw.opts.enableScroll) {
				curDraw.scrollEnd(e)
			}
		}
	}
	setInsMethod(e : ComponentPublicInstance, rect : DOMRect) {
		this.ins = e
		this.baseX = rect.x
		this.baseY = rect.y
	}
	setContext(context : CanvasContext) {
		this.canvasContext = context
		const ctx = context.getContext('2d')!;
		this.context = ctx
		const canvas = ctx.canvas
		this.offsetWidth = canvas.offsetWidth
		this.offsetHeight = canvas.offsetHeight
	}
	getDrawCharts(name : number) : TuiDrawCharts | null {
		return this.chartsMap.get(name)
	}
	add(name : number, option : UTSJSONObject) : TuiDrawCharts {
		const ctx = this.context!
		option.set('context', ctx)
		if (option.getNumber('width') == null) option.set('width', ctx.canvas.offsetWidth)
		if (option.getNumber('height') == null) option.set('height', ctx.canvas.offsetHeight)
		option.set('pixelRatio', 1)
		option.set('canvas2d', true)
		option.set('canvasContext', this.canvasContext)
		if (option.getArray('padding') == null) option.set('padding', [0, 0, 0, 0])
		if (option.getArray('series') == null) option.set('series', [] as UTSJSONObject[])
		const charts = new TuiDrawCharts(option)
		this.chartsMap.set(name, charts)
		this.option = option
		return charts
	}
}