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| import { ArrayList } from '@kit.ArkTS'
import { Rect } from '@ohos.UiTest'
@Preview
@ComponentV2
export struct AirVelocity {
@Param @Once minLevel: number = 0
@Param @Once maxLevel: number = 6
@Param @Once currentLevel: number = 3
@Param normalColor: string | number = '#f5f5f5'
@Param selectedColor: string | number = '#005eff'
@Param backGroundColor: string | number = Color.White
@Local private itemHeightRate: number = 0.150
@Local private itemHeight: number = 22
@Local private itemWidth: number = 0
@Local private blankHeightRate: number = 0.019
@Local private blankHeight: number = 3
@Param paddingAll: number = 5
@Param radiusAll: number = 5
@Local private settings: RenderingContextSettings = new RenderingContextSettings(true)
@Local private canvasContext: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)
@Local private path: Path2D = new Path2D()
@Local private edgeRects: ArrayList<Rect> = new ArrayList()
@Event onChange: (oldValue: number, newValue: number) => void = (oldValue, newValue) => {
}
aboutToAppear(): void {
if (this.minLevel < 0) {
this.minLevel = 0
}
if (this.maxLevel < this.minLevel) {
this.maxLevel = this.minLevel
this.currentLevel = this.maxLevel
}
}
build() {
Column() {
Canvas(this.canvasContext)
.width('100%')
.height('100%')
.onReady(() => {
this.drawRects()
})
.gesture(GestureGroup(GestureMode.Exclusive,
TapGesture()
.onAction((event: GestureEvent) => {
if (event.fingerList?.length) {
console.debug('AirVelocity TapGesture', JSON.stringify(event))
let x = event.fingerList[0].localX
let y = event.fingerList[0].localY
this.drawRoundRectByTouch(x, y)
}
}),
PanGesture()
.onActionUpdate((event: GestureEvent) => {
if (event.fingerList?.length) {
console.debug('AirVelocity PanGesture onActionUpdate', JSON.stringify(event))
let x = event.fingerList[0].localX
let y = event.fingerList[0].localY
this.drawRoundRectByTouch(x, y)
}
})
.onActionEnd((event: GestureEvent) => {
console.debug('AirVelocity PanGesture onActionEnd', JSON.stringify(event))
})
,
))
}
.width('100%')
.height('100%')
.padding(this.paddingAll)
.borderRadius(this.radiusAll)
.backgroundColor(this.backGroundColor)
}
drawRoundRectByTouch(touchX: number, touchY: number) {
if (touchY > this.canvasContext.height) {
this.onRedrawRects(this.maxLevel)
return
}
let rect: Rect
for (let i = 0; i < this.edgeRects.length; i++) {
rect = this.edgeRects[i]
if (rect && touchX >= rect.left && touchX <= rect.right
&& touchY >= rect.top && touchY <= rect.bottom) {
this.onRedrawRects(i)
break
}
}
}
private onRedrawRects(destIndex: number) {
let old = this.currentLevel
this.currentLevel = this.maxLevel - destIndex
this.drawRects()
this.onChange(old, this.currentLevel)
}
private drawRects() {
this.itemWidth = this.canvasContext.width
let height = this.canvasContext.height * 6 / this.maxLevel
this.itemHeight = height * this.itemHeightRate
this.blankHeight = height * this.blankHeightRate
this.edgeRects.clear()
this.canvasContext.reset()
let itemX: number = 0, itemY: number
for (let index = 0; index < this.maxLevel; index++) {
itemY = (this.itemHeight + this.blankHeight) * index
this.drawRoundRect(index, itemX, itemY, this.itemWidth, this.itemHeight)
}
}
private drawRoundRect(index: number, x: number, y: number, width: number, height: number) {
if (this.maxLevel - index > this.currentLevel) {
this.canvasContext.strokeStyle = this.normalColor
this.canvasContext.fillStyle = this.normalColor
} else {
this.canvasContext.strokeStyle = this.selectedColor
this.canvasContext.fillStyle = this.selectedColor
}
this.path = new Path2D()
this.path.moveTo(x + this.radiusAll, y)
this.path.quadraticCurveTo(x, y, x, y + this.radiusAll)
let bottomLeftStartY = y + height - this.radiusAll
this.path.lineTo(x, bottomLeftStartY)
this.path.quadraticCurveTo(x, bottomLeftStartY + this.radiusAll, x + this.radiusAll, y + height)
let bottomRightStartX = x + width - this.radiusAll
this.path.lineTo(bottomRightStartX, y + height)
this.path.quadraticCurveTo(x + width, y + height, x + width, y + height - this.radiusAll)
this.path.lineTo(x + width, y + this.radiusAll)
this.path.quadraticCurveTo(x + width, y, x + width - this.radiusAll, y)
this.path.lineTo(x + this.radiusAll, y)
this.path.closePath()
this.canvasContext.fill(this.path)
let rect: Rect = {
left: x,
top: y,
right: x + width,
bottom: y + height
}
if (!this.edgeRects.has(rect)) {
this.edgeRects.add(rect)
}
}
}
|
