276 lines
8.8 KiB
JavaScript
276 lines
8.8 KiB
JavaScript
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import { CardLoader, DOMFlip } from '../flippable.js'
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import { Capabilities } from '../capabilities.js'
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import { DeepZoomImage } from './deepzoom/image.js'
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let globalScatterLoaderCanvas = null
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export class ScatterLoader extends CardLoader {
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get scatter() {
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return this.src
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}
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unscaledSize() {
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let displayObject = this.scatter.displayObject
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let w = displayObject.width
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let h = displayObject.height
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return [w / displayObject.scale.x, h / displayObject.scale.y]
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}
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scaledSize() {
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let displayObject = this.scatter.displayObject
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let w = displayObject.width
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let h = displayObject.height
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return [w, h]
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}
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cloneScatterImage() {
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let w = this.scatter.width
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let h = this.scatter.height
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let isSprite = this.scatter.displayObject instanceof PIXI.Sprite
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let isDeepZoom = this.scatter.displayObject instanceof DeepZoomImage
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let resolution = app.renderer.resolution
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if (isSprite) {
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w = this.scatter.displayObject.texture.width
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h = this.scatter.displayObject.texture.height
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} else if (isDeepZoom) {
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let [ww, hh] = this.scatter.displayObject.baseSize
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w = ww
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h = hh
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}
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if (globalScatterLoaderCanvas === null) {
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globalScatterLoaderCanvas = document.createElement('canvas')
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}
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let canvas = globalScatterLoaderCanvas
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canvas.width = w
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canvas.height = h
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let renderer = new PIXI.Renderer({
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width: w,
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height: h,
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view: canvas,
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resolution: resolution
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})
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let displayObject = this.scatter.displayObject
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let x = displayObject.x
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let y = displayObject.y
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let rot = displayObject.rotation
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let sx = displayObject.scale.x
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let sy = displayObject.scale.y
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displayObject.rotation = 0
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// The Safari WebGLRenderer wants everything flipped
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// See https://github.com/pixijs/pixi.js/issues/2283
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displayObject.x = 0
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if (Capabilities.isSafari) {
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displayObject.y = h
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displayObject.scale.set(1, -1) // sx, -sy)
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} else {
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displayObject.y = 0
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displayObject.scale.set(1, 1)
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}
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if (isSprite) {
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displayObject.width = w
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displayObject.height = h
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}
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renderer.render(displayObject)
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displayObject.rotation = rot
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displayObject.x = x
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displayObject.y = y
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displayObject.scale.set(sx, sy)
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let url = canvas.toDataURL()
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return [x, y, w, h, url]
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}
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load(domNode) {
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return new Promise((resolve, reject) => {
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let isImage = domNode instanceof HTMLImageElement
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let isSprite = this.scatter.displayObject instanceof PIXI.Sprite
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let image = isImage ? domNode : document.createElement('img')
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let [x, y, w, h, cloneURL] = this.cloneScatterImage()
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let [ww, hh] = this.unscaledSize()
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image.onload = e => {
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if (!isImage) domNode.appendChild(image)
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this.x = x
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this.y = y
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this.wantedWidth = ww
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this.wantedHeight = hh
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this.scale = 1
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this.rotation = this.scatter.rotation
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resolve(this)
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}
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image.onerror = e => {
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reject(this)
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}
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image.src = cloneURL
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})
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}
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}
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export default class FlipEffect {
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constructor(scatter, domScatterContainer, flipTemplate, backLoader) {
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this.flipped = false
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this.scatter = scatter
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this.backLoader = backLoader
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this.scatterLoader = new ScatterLoader(scatter)
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this.domFlip = new DOMFlip(domScatterContainer, flipTemplate, this.scatterLoader, backLoader, {
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onBack: this.backCardClosed.bind(this)
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})
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this.setupInfoButton()
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}
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startFlip() {
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let center = this.flipCenter()
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let loader = this.backLoader
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this.domFlip.load().then(domFlip => {
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this.scatter.displayObject.visible = false
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domFlip.centerAt(center)
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domFlip.zoom(this.scatter.scale)
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let target = this.constraintFlipCenter(center, loader)
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domFlip.start({ targetCenter: target })
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})
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}
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unscaledSize() {
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return this.scatterLoader.unscaledSize()
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}
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flipCenter() {
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let isSprite = this.scatter.displayObject instanceof PIXI.Sprite
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let resolution = isSprite ? app.renderer.resolution : 1
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let center = this.scatter.center
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let canvas = app.renderer.view
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let domNode = this.domFlip.domScatterContainer.element
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let page = window.convertPointFromNodeToPage(canvas, center.x * resolution, center.y * resolution)
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let local = window.convertPointFromPageToNode(domNode, page.x, page.y)
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return local
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}
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constraintFlipCenter(center, loader) {
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let w = loader.wantedWidth
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let h = loader.wantedHeight
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let canvas = app.renderer.view
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let x = center.x
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let y = center.y
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if (x < w / 2) x = w / 2
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if (y < h / 2) y = h / 2
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if (x > canvas.width) x = canvas.width - w / 2
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if (y > canvas.height) y = canvas.height - h / 2
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return { x, y }
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}
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setupInfoButton() {
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let iscale = 1.0 / this.scatter.scale
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this.infoBtn = new PIXI.Graphics()
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this.infoBtn.beginFill(0x333333)
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this.infoBtn.lineStyle(4, 0xffffff)
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this.infoBtn.drawCircle(0, 0, 22)
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this.infoBtn.endFill()
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this.infoBtn.beginFill(0xffffff)
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this.infoBtn.lineStyle(0)
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this.infoBtn.drawCircle(0, -8, 4)
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this.infoBtn.endFill()
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this.infoBtn.lineStyle(6, 0xffffff)
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this.infoBtn.moveTo(0, -2)
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this.infoBtn.lineTo(0, 14)
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this.infoBtn.endFill()
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this.infoBtn.on('click', e => {
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this.infoSelected()
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})
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this.infoBtn.on('tap', e => {
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this.infoSelected()
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})
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this.infoBtn.interactive = true
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this.infoBtn.width = 44
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this.infoBtn.height = 44
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this.infoBtn.pivot.x = 30
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this.infoBtn.pivot.y = 30
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let displayObject = this.scatter.displayObject
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let [w, h] = this.unscaledSize()
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this.infoBtn.position = new PIXI.Point(w, h)
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if (displayObject.foreground) {
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this.infoBtn.scale.x = iscale
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this.infoBtn.scale.y = iscale
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displayObject.foreground.addChild(this.infoBtn)
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} else {
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displayObject.addChild(this.infoBtn)
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}
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this.scatter.addTransformEventCallback(e => {
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let displayObject = this.scatter.displayObject
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if (displayObject.foreground) {
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if (e.scale) {
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let iscale = 1.0 / e.scale
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this.infoBtn.scale.x = iscale
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this.infoBtn.scale.y = iscale
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}
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}
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})
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}
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setupButton(url) {
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let svgImage = new Image()
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let canvas = document.createElement('canvas')
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canvas.width = 88 * 4
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canvas.height = 44 * 4
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svgImage.onload = e => {
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let displayObject = this.scatter.displayObject
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canvas.getContext('2d').drawImage(svgImage, 0, 0, canvas.width, canvas.height)
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let texure = new PIXI.Texture(new PIXI.BaseTexture(canvas))
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this.infoBtn = new PIXI.Sprite(texure)
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this.infoBtn.anchor.set(0.5, 0.5)
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if (displayObject.foreground) {
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displayObject.foreground.addChild(this.infoBtn)
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} else {
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displayObject.addChild(this.infoBtn)
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}
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this.infoBtn.scale.set(0.5, 0.5)
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let [w, h] = this.unscaledSize()
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this.infoBtn.position = new PIXI.Point(w, h)
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this.infoBtn.interactive = true
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this.infoBtn.updateTransform()
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this.infoBtn.on('click', e => {
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this.infoSelected()
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})
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this.infoBtn.on('tap', e => {
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this.infoSelected()
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})
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}
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svgImage.src = url
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}
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infoSelected() {
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this.startFlip()
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}
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backSelected() {
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this.domFlip.start()
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}
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backCardClosed() {
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/*** The flip effect should now be in it's initial state again. All
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memory should be freed. ***/
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let displayObject = this.scatter.displayObject
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displayObject.visible = true
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this.domFlip.fadeOutAndRemove()
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this.flipped = false
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}
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targetRotation(alpha) {
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let ortho = 90
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let rest = alpha % ortho
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let delta = 0.0
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if (rest > ortho / 2.0) {
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delta = ortho - rest
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} else {
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delta = -rest
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}
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return delta
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}
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}
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