1507 lines
44 KiB
JavaScript
1507 lines
44 KiB
JavaScript
/* eslint-disable no-unused-vars */
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/* eslint-disable no-console */
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/* globals debugCanvas */
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import Interface from './interface.js'
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import { Points, Polygon, Angle, Elements, LowPassFilter } from './utils.js'
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import Events from './events.js'
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import { InteractionMapper } from './interaction.js'
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import { Capabilities } from './capabilities.js'
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/** This interface allows scatters to delegate tap events to other objects. */
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export class ITapDelegate extends Interface {
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/** This method must be defined by the delegate. It handles the tap event. */
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tap(event) {}
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/** Tells the delegate that it should handle standard click events. */
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handleClicks() {}
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}
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/**
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* A base class for scatter specific events.
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*
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* @constructor
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* @param {name} String - The name of the event
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* @param {target} Object - The target of the event
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*/
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export class BaseEvent {
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constructor(name, target) {
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this.name = name
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this.target = target
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}
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}
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// Event types
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const START = 'onStart'
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const UPDATE = 'onUpdate'
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const END = 'onEnd'
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/**
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* A scatter event that describes how the scatter has changed.
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*
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* @constructor
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* @param {target} Object - The target scatter of the event
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* @param {optional} Object - Optional parameter
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*/
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export class ScatterEvent extends BaseEvent {
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constructor(
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target,
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{ translate = { x: 0, y: 0 }, scale = null, rotate = 0, about = null, fast = false, type = null } = {}
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) {
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super('scatterTransformed', { target: target })
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this.translate = translate
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this.scale = scale
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this.rotate = rotate
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this.about = about
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this.fast = fast
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this.type = type
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}
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toString() {
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return (
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"Event('scatterTransformed', scale: " + this.scale + ' about: ' + this.about.x + ', ' + this.about.y + ')'
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)
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}
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}
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/**
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* A scatter resize event that describes how the scatter has changed.
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*
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* @constructor
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* @param {target} Object - The target scatter of the event
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* @param {optional} Object - Optional parameter
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*/
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export class ResizeEvent extends BaseEvent {
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constructor(target, { width = 0, height = 0 } = {}) {
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super('scatterResized', { width: width, height: height })
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this.width = width
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this.height = height
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}
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toString() {
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return 'Event(scatterResized width: ' + this.width + 'height: ' + this.height + ')'
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}
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}
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/**
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* A abstract base class that implements the throwable behavior of a scatter
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* object.
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*
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* @constructor
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*/
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class Throwable {
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constructor({
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movableX = true,
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movableY = true,
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throwVisibility = 44,
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throwDamping = 0.95,
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autoThrow = true,
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onThrowFinished = null
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} = {}) {
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this.movableX = movableX
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this.movableY = movableY
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this.throwVisibility = throwVisibility
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this.throwDamping = throwDamping
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this.autoThrow = autoThrow
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this.velocities = []
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this.velocity = null
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this.timestamp = null
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this.onThrowFinished = onThrowFinished
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//console.log("onThrowFinished", onThrowFinished)
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}
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observeVelocity() {
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this.lastframe = performance.now()
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}
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addVelocity(delta, buffer = 5) {
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let t = performance.now()
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let dt = t - this.lastframe
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this.lastframe = t
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// When number is not set or is zero. Use one instead.
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let number = delta.number ? delta.number : 1
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if (dt > 0) {
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// Avoid division by zero errors later on
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// and consider the number of involved pointers sind addVelocity will be called by the
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// onMove events
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let velocity = {
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t: t,
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dt: dt,
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dx: delta.x / number,
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dy: delta.y / number
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}
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this.velocities.push(velocity)
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while (this.velocities.length > buffer) {
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this.velocities.shift()
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}
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}
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}
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meanVelocity(milliseconds = 30) {
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this.addVelocity({ x: 0, y: 0, number: 1 })
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let sum = { x: 0, y: 0 }
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let count = 0
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let t = 0
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for (let i = this.velocities.length - 1; i > 0; i--) {
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let v = this.velocities[i]
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t += v.dt
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let nv = { x: v.dx / v.dt, y: v.dy / v.dt }
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sum = Points.add(sum, nv)
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count += 1
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if (t > milliseconds) {
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break
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}
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}
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if (count === 0) return sum // empty vector
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return Points.multiplyScalar(sum, 1 / count)
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}
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killAnimation() {
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this.velocity = null
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this.velocities = []
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}
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startThrow() {
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this.velocity = this.meanVelocity()
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if (this.velocity != null) {
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// Call next velocity to ansure that specializations
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// that use keepOnStage are called
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this.velocity = this.nextVelocity(this.velocity)
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if (this.autoThrow) this.animateThrow(performance.now())
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} else {
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this.onDragComplete()
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}
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}
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_throwDeltaTime() {
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let t = performance.now()
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let dt = t - this.lastframe
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this.lastframe = t
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return dt
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}
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animateThrow(time) {
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if (this.velocity != null) {
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let dt = this._throwDeltaTime()
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// console.log("animateThrow", dt)
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let next = this.nextVelocity(this.velocity)
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let prevLength = Points.length(this.velocity)
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let nextLength = Points.length(next)
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if (nextLength > prevLength) {
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let factor = nextLength / prevLength
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next = Points.multiplyScalar(next, 1 / factor)
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console.log('Prevent acceleration', factor, this.velocity, next)
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}
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this.velocity = next
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let d = Points.multiplyScalar(this.velocity, dt)
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this._move(d)
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this.onDragUpdate(d)
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if (dt == 0 || this.needsAnimation()) {
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requestAnimationFrame(this.animateThrow.bind(this))
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return
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} else {
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if (this.isOutside()) {
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requestAnimationFrame(this.animateThrow.bind(this))
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return
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}
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}
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}
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this.onDragComplete()
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if (this.onThrowFinished != null) {
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this.onThrowFinished()
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}
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}
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needsAnimation() {
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if (this.velocity == null) {
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return false
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}
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return Points.length(this.velocity) > 0.01
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}
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nextVelocity(velocity) {
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// Must be overwritten: computes the changed velocity. Implement
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// damping, collison detection, etc. here
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let next = Points.multiplyScalar(velocity, this.throwDamping)
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return {
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x: this.movableX ? next.x : 0,
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y: this.movableY ? next.y : 0
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}
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}
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_move(delta) {
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// Overwrite if necessary
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}
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onDragComplete() {
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// Overwrite if necessary
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}
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onDragUpdate(delta) {
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// Overwrite if necessary
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}
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}
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export class AbstractScatter extends Throwable {
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constructor({
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minScale = 0.1,
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maxScale = 1.0,
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startScale = 1.0,
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autoBringToFront = true,
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autoThrow = true,
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translatable = true,
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scalable = true,
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rotatable = true,
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resizable = false,
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movableX = true,
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movableY = true,
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throwVisibility = 44,
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throwDamping = 0.95,
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overdoScaling = 1,
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mouseZoomFactor = 1.1,
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rotationDegrees = null,
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rotation = null,
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onTransform = null,
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interactive = true,
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onClose = null,
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onThrowFinished = null,
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scaleAutoClose = false,
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scaleCloseThreshold = 0.1,
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scaleCloseBuffer = 0.05,
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maxRotation = Angle.degree2radian(5),
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minInteractionDistance = 0,
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useLowPassFilter = false
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} = {}) {
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if (rotationDegrees != null && rotation != null) {
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throw new Error('Use rotationDegrees or rotation but not both')
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} else if (rotation != null) {
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rotationDegrees = Angle.radian2degree(rotation)
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} else if (rotationDegrees == null) {
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rotationDegrees = 0
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}
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super({
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movableX,
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movableY,
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throwVisibility,
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throwDamping,
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autoThrow,
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onThrowFinished
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})
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/**
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* Closes the card when the minScale is reached and the
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* card is released. Card can be saved by scaling it up again.
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*/
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this.scaleAutoClose = scaleAutoClose
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this.scaleCloseThreshold = scaleCloseThreshold
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this.scaleCloseBuffer = scaleCloseBuffer
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this.scaleAutoCloseTimeout = null
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this.interactive = interactive
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this.startRotationDegrees = rotationDegrees
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this.startScale = startScale // Needed to reset object
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this.minScale = minScale
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this.maxScale = maxScale
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this.maxRotation = maxRotation
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this.overdoScaling = overdoScaling
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this.translatable = translatable
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if (!translatable) {
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this.movableX = false
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this.movableY = false
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}
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this.scalable = scalable
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this.rotatable = rotatable
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this.resizable = resizable
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this.mouseZoomFactor = mouseZoomFactor
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this.autoBringToFront = autoBringToFront
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this.useLowPassFilter = useLowPassFilter
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this.minInteractionDistance = minInteractionDistance
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if (useLowPassFilter) {
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this.rotateLPF = new LowPassFilter()
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this.zoomLPF = new LowPassFilter()
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this.zoomLPF.setup([1, 1, 1, 1, 1, 1, 1, 1, 1, 1])
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}
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this.dragging = false
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this.onTransform = onTransform != null ? [onTransform] : null
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this.onClose = onClose != null ? [onClose] : null
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}
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addCloseEventCallback(callback) {
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if (this.onClose == null) {
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this.onClose = []
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}
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this.onClose.push(callback)
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}
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addTransformEventCallback(callback) {
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if (this.onTransform == null) {
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this.onTransform = []
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}
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this.onTransform.push(callback)
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}
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startGesture(interaction) {
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this.bringToFront()
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this.killAnimation()
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this.observeVelocity()
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if (this.useLowPassFilter) {
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this.rotateLPF.clear()
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this.zoomLPF.clear()
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this.zoomLPF.setup([1, 1, 1, 1, 1, 1, 1, 1, 1, 1])
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}
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return true
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}
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close() {
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this._callCloseCallbacks()
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this._removeCallbacks()
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this._removeSelfFromScatterContainer()
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}
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_callCloseCallbacks() {
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if (this.onClose) {
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this.onClose.forEach(callback => callback(this))
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}
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}
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_removeCallbacks() {
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this.onClose = []
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this.onTransform = []
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}
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_removeSelfFromScatterContainer() {
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// Removes self from container when it's closed.
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if (this.container) {
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this.container.remove(this)
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}
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}
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gesture(interaction) {
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let delta = interaction.delta()
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if (delta != null) {
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let rotate = delta.rotate
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let zoom = delta.zoom
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if (this.maxRotation != null) {
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if (Math.abs(rotate) > this.maxRotation) {
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rotate = 0
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}
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}
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if (this.useLowPassFilter) {
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rotate = this.rotateLPF.next(rotate)
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zoom = this.zoomLPF.next(zoom)
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}
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if (delta.distance < this.minInteractionDistance) {
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let ratio = delta.distance / this.minInteractionDistance
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rotate *= ratio
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let zoomDelta = zoom - 1
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zoomDelta *= ratio
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zoom = 1 + zoomDelta
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}
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this.transform(delta, zoom, rotate, delta.about)
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if (zoom != 1) this.interactionAnchor = delta.about
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}
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}
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get polygon() {
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let w2 = (this.width * this.scale) / 2
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let h2 = (this.height * this.scale) / 2
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let center = this.center
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let polygon = new Polygon(center)
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polygon.addPoint({ x: -w2, y: -h2 })
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polygon.addPoint({ x: w2, y: -h2 })
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polygon.addPoint({ x: w2, y: h2 })
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polygon.addPoint({ x: -w2, y: h2 })
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polygon.rotate(this.rotation)
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return polygon
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}
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isOutside() {
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let stagePolygon = this.containerPolygon
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if (stagePolygon == null) return false
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let polygon = this.polygon
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if (polygon == null) return false
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let result = stagePolygon.intersectsWith(polygon)
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return result === false || result.overlap < this.throwVisibility
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}
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recenter() {
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// Return a small vector that guarantees that the scatter is moving
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// towards the center of the stage
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let center = this.center
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let target = this.container.center
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let delta = Points.subtract(target, center)
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return Points.normalize(delta)
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}
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nextVelocity(velocity) {
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return this.keepOnStage(velocity)
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}
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bouncing() {
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// Implements the bouncing behavior of the scatter. Moves the scatter
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// to the center of the stage if the scatter is outside the stage or
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// not within the limits of the throwVisibility.
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let stagePolygon = this.containerPolygon
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let polygon = this.polygon
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let result = stagePolygon.intersectsWith(polygon)
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if (result === false || result.overlap < this.throwVisibility) {
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let cv = this.recenter()
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let recentered = false
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while (result === false || result.overlap < this.throwVisibility) {
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polygon.center.x += cv.x
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polygon.center.y += cv.y
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this._move(cv)
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result = stagePolygon.intersectsWith(polygon)
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recentered = true
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}
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return recentered
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}
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return false
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}
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keepOnStage(velocity, collision = 0.5) {
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let stagePolygon = this.containerPolygon
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// UO: since keepOnStage is called in nextVelocity we need to
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// ensure a return value
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if (!stagePolygon) return { x: 0, y: 0 }
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let polygon = this.polygon
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let bounced = this.bouncing()
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if (bounced) {
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let stage = this.containerBounds
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let x = this.center.x
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let y = this.center.y
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let dx = this.movableX ? velocity.x : 0
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let dy = this.movableY ? velocity.y : 0
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let factor = this.throwDamping
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// if (recentered) {
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if (x < 0) {
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dx = -dx
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factor = collision
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}
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if (x > stage.width) {
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dx = -dx
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factor = collision
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}
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if (y < 0) {
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dy = -dy
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factor = collision
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}
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if (y > stage.height) {
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dy = -dy
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factor = collision
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}
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// }
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return Points.multiplyScalar({ x: dx, y: dy }, factor)
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}
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return super.nextVelocity(velocity)
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}
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endGesture(interaction) {
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this.startThrow()
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this._checkAutoClose()
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}
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_checkAutoClose() {
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if (this.scaleAutoClose)
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if (this.scale < this.minScale + this.scaleCloseThreshold - this.scaleCloseBuffer) {
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this.zoom(this.minScale, {
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animate: 0.2,
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onComplete: this.close.bind(this)
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})
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} else if (this.scale < this.minScale + this.scaleCloseThreshold) {
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this.zoom(this.minScale + this.scaleCloseThreshold, {
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animate: 0.4
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})
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}
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}
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rotateDegrees(degrees, anchor) {
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let rad = Angle.degree2radian(degrees)
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this.rotate(rad, anchor)
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}
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rotate(rad, anchor) {
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this.transform({ x: 0, y: 0 }, 1.0, rad, anchor)
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}
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move(d, { animate = 0 } = {}) {
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if (this.translatable) {
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if (animate > 0) {
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let startPos = this.position
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TweenLite.to(this, animate, {
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x: '+=' + d.x,
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y: '+=' + d.y,
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/* scale: scale, uo: not defined, why was this here? */
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onUpdate: e => {
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let p = this.position
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let dx = p.x - startPos.x
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let dy = p.x - startPos.y
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this.onMoved(dx, dy)
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}
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})
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} else {
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this._move(d)
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this.onMoved(d.x, d.y)
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}
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}
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}
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moveTo(p, { animate = 0 } = {}) {
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let c = this.origin
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let delta = Points.subtract(p, c)
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this.move(delta, { animate: animate })
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}
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centerAt(p, { animate = 0 } = {}) {
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let c = this.center
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let delta = Points.subtract(p, c)
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this.move(delta, { animate: animate })
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}
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zoom(scale, { animate = 0, about = null, delay = 0, x = null, y = null, onComplete = null } = {}) {
|
|
let anchor = about || this.center
|
|
if (scale != this.scale) {
|
|
if (animate > 0) {
|
|
TweenLite.to(this, animate, {
|
|
scale: scale,
|
|
delay: delay,
|
|
onComplete: onComplete,
|
|
onUpdate: this.onZoomed.bind(this)
|
|
})
|
|
} else {
|
|
this.scale = scale
|
|
this.onZoomed(anchor)
|
|
}
|
|
}
|
|
}
|
|
|
|
_move(delta) {
|
|
this.addVelocity(delta)
|
|
this.x += this.movableX ? delta.x : 0
|
|
this.y += this.movableX ? delta.y : 0
|
|
}
|
|
|
|
transform(translate, zoom, rotate, anchor) {
|
|
let delta = {
|
|
x: this.movableX ? translate.x : 0,
|
|
y: this.movableY ? translate.y : 0
|
|
}
|
|
if (this.resizable) var vzoom = zoom
|
|
if (!this.translatable) delta = { x: 0, y: 0 }
|
|
if (!this.rotatable) rotate = 0
|
|
if (!this.scalable) zoom = 1.0
|
|
if (zoom == 1.0 && rotate == 0) {
|
|
this._move(delta)
|
|
if (this.onTransform != null) {
|
|
let event = new ScatterEvent(this, {
|
|
translate: delta,
|
|
scale: this.scale,
|
|
rotate: 0,
|
|
about: anchor,
|
|
fast: false,
|
|
type: UPDATE
|
|
})
|
|
this.onTransform.forEach(function(f) {
|
|
f(event)
|
|
})
|
|
}
|
|
return
|
|
}
|
|
let origin = this.rotationOrigin
|
|
let beta = Points.angle(origin, anchor)
|
|
let distance = Points.distance(origin, anchor)
|
|
let { scale: newScale, zoom: thresholdedZoom } = this.calculateScale(zoom)
|
|
|
|
let newOrigin = Points.arc(anchor, beta + rotate, distance * thresholdedZoom)
|
|
let extra = Points.subtract(newOrigin, origin)
|
|
let offset = Points.subtract(anchor, origin)
|
|
this._move(offset)
|
|
this.scale = newScale
|
|
this.rotation += rotate
|
|
offset = Points.negate(offset)
|
|
offset = Points.add(offset, extra)
|
|
offset = Points.add(offset, translate)
|
|
this._move(offset)
|
|
|
|
delta.x += extra.x
|
|
delta.y += extra.y
|
|
if (this.onTransform != null) {
|
|
let event = new ScatterEvent(this, {
|
|
translate: delta,
|
|
scale: newScale,
|
|
rotate: rotate,
|
|
about: anchor
|
|
})
|
|
this.onTransform.forEach(function(f) {
|
|
f(event)
|
|
})
|
|
}
|
|
if (this.resizable) {
|
|
this.resizeAfterTransform(vzoom)
|
|
}
|
|
}
|
|
|
|
/**
|
|
* For a given zoom, a new scale is calculated, taking
|
|
* min and max scale into account.
|
|
*
|
|
* @param {number} zoom - The zoom factor, to scale the object with.
|
|
* @returns {object} - Returns an object containing the a value for a valid scale and the corrected zoom factor.
|
|
*/
|
|
calculateScale(zoom) {
|
|
let scale = this.scale * zoom
|
|
|
|
let minScale = this.minScale / this.overdoScaling
|
|
let maxScale = this.maxScale * this.overdoScaling
|
|
if (scale < minScale) {
|
|
scale = minScale
|
|
zoom = scale / this.scale
|
|
}
|
|
if (scale > maxScale) {
|
|
scale = maxScale
|
|
zoom = scale / this.scale
|
|
}
|
|
|
|
if (this.scaleAutoClose) this._updateTransparency()
|
|
|
|
return { zoom, scale }
|
|
}
|
|
|
|
_updateTransparency() {
|
|
if (this.scale < this.minScale + this.scaleCloseThreshold) {
|
|
let transparency = this.calculateScaleTransparency()
|
|
this.element.style.opacity = transparency
|
|
} else this.element.style.opacity = 1
|
|
}
|
|
|
|
calculateScaleTransparency() {
|
|
let transparency = (this.scale - this.minScale) / this.scaleCloseThreshold
|
|
transparency = transparency > 1 ? 1 : transparency < 0 ? 0 : transparency
|
|
return transparency
|
|
}
|
|
|
|
resizeAfterTransform(zoom) {
|
|
// Overwrite this in subclasses.
|
|
}
|
|
|
|
validScale(scale) {
|
|
scale = Math.max(scale, this.minScale)
|
|
scale = Math.min(scale, this.maxScale)
|
|
return scale
|
|
}
|
|
|
|
animateZoomBounce(dt = 1) {
|
|
if (this.zoomAnchor != null) {
|
|
let zoom = 1
|
|
let amount = Math.min(0.01, (0.3 * dt) / 100000.0)
|
|
if (this.scale < this.minScale) zoom = 1 + amount
|
|
if (this.scale > this.maxScale) zoom = 1 - amount
|
|
if (zoom != 1) {
|
|
this.transform({ x: 0, y: 0 }, zoom, 0, this.zoomAnchor)
|
|
requestAnimationFrame(dt => {
|
|
this.animateZoomBounce(dt)
|
|
})
|
|
return
|
|
}
|
|
this.zoomAnchor = null
|
|
}
|
|
}
|
|
|
|
checkScaling(about, delay = 0) {
|
|
this.zoomAnchor = about
|
|
clearTimeout(this.animateZoomBounce.bind(this))
|
|
setTimeout(this.animateZoomBounce.bind(this), delay)
|
|
}
|
|
|
|
onMouseWheel(event) {
|
|
if (event.claimedByScatter) {
|
|
if (event.claimedByScatter != this) return
|
|
}
|
|
this.killAnimation()
|
|
this.targetScale = null
|
|
let direction = event.detail < 0 || event.wheelDelta > 0
|
|
let globalPoint = { x: event.clientX, y: event.clientY }
|
|
let centerPoint = this.mapPositionToContainerPoint(globalPoint)
|
|
if (event.shiftKey) {
|
|
let degrees = direction ? 5 : -5
|
|
let rad = Angle.degree2radian(degrees)
|
|
return this.transform({ x: 0, y: 0 }, 1.0, rad, centerPoint)
|
|
}
|
|
const zoomFactor = this.mouseZoomFactor
|
|
let zoom = direction ? zoomFactor : 1 / zoomFactor
|
|
this.transform({ x: 0, y: 0 }, zoom, 0, centerPoint)
|
|
this.checkScaling(centerPoint, 200)
|
|
|
|
if (this.scaleAutoClose) {
|
|
if (this.scale <= this.minScale + this.scaleCloseThreshold) {
|
|
if (this.scaleAutoCloseTimeout) clearTimeout(this.scaleAutoCloseTimeout)
|
|
this.scaleAutoCloseTimeout = setTimeout(() => {
|
|
this._checkAutoClose()
|
|
}, 600)
|
|
}
|
|
this._updateTransparency()
|
|
}
|
|
}
|
|
|
|
onStart(event, interaction) {
|
|
if (this.startGesture(interaction)) {
|
|
this.dragging = true
|
|
this.interactionAnchor = null
|
|
}
|
|
if (this.onTransform != null) {
|
|
let event = new ScatterEvent(this, {
|
|
translate: { x: 0, y: 0 },
|
|
scale: this.scale,
|
|
rotate: 0,
|
|
about: null,
|
|
fast: false,
|
|
type: START
|
|
})
|
|
this.onTransform.forEach(function(f) {
|
|
f(event)
|
|
})
|
|
}
|
|
}
|
|
|
|
onMove(event, interaction) {
|
|
/** As long as mouseout && mouseleave interrupt we cannot be sure that
|
|
* dragging remains correct.
|
|
*/
|
|
if (this.dragging) {
|
|
this.gesture(interaction)
|
|
}
|
|
}
|
|
|
|
onEnd(event, interaction) {
|
|
console.log('Scatter.onEnd', this.dragging)
|
|
if (interaction.isFinished()) {
|
|
this.endGesture(interaction)
|
|
this.dragging = false
|
|
for (let key of interaction.ended.keys()) {
|
|
if (interaction.isTap(key)) {
|
|
console.log('Scatter.isTap')
|
|
let point = interaction.ended.get(key)
|
|
this.onTap(event, interaction, point)
|
|
}
|
|
}
|
|
if (this.onTransform != null) {
|
|
let event = new ScatterEvent(this, {
|
|
translate: { x: 0, y: 0 },
|
|
scale: this.scale,
|
|
rotate: 0,
|
|
about: null,
|
|
fast: false,
|
|
type: END
|
|
})
|
|
this.onTransform.forEach(function(f) {
|
|
f(event)
|
|
})
|
|
}
|
|
}
|
|
let about = this.interactionAnchor
|
|
if (about != null) {
|
|
this.checkScaling(about, 100)
|
|
}
|
|
}
|
|
|
|
//onTap(event, interaction, point) {}
|
|
|
|
onTap(event, interaction, point) {
|
|
console.log('AbstractScatter.onTap', this.tapDelegate, interaction)
|
|
if (this.tapDelegate) {
|
|
Events.stop(event)
|
|
this.tapDelegate.tap(event, 'scatter')
|
|
}
|
|
}
|
|
|
|
onDragUpdate(delta) {
|
|
if (this.onTransform != null) {
|
|
let event = new ScatterEvent(this, {
|
|
fast: true,
|
|
translate: delta,
|
|
scale: this.scale,
|
|
about: this.currentAbout,
|
|
type: null
|
|
})
|
|
this.onTransform.forEach(function(f) {
|
|
f(event)
|
|
})
|
|
}
|
|
}
|
|
|
|
onDragComplete() {
|
|
if (this.onTransform) {
|
|
let event = new ScatterEvent(this, {
|
|
scale: this.scale,
|
|
about: this.currentAbout,
|
|
fast: false,
|
|
type: null
|
|
})
|
|
this.onTransform.forEach(function(f) {
|
|
f(event)
|
|
})
|
|
}
|
|
}
|
|
|
|
onMoved(dx, dy, about) {
|
|
if (this.onTransform != null) {
|
|
let event = new ScatterEvent(this, {
|
|
translate: { x: dx, y: dy },
|
|
about: about,
|
|
fast: true,
|
|
type: null
|
|
})
|
|
this.onTransform.forEach(function(f) {
|
|
f(event)
|
|
})
|
|
}
|
|
}
|
|
|
|
onResizing() {
|
|
if (this.onTransform != null) {
|
|
let event = new ScatterEvent(this, {
|
|
scale: this.scale,
|
|
fast: false,
|
|
type: null
|
|
})
|
|
this.onTransform.forEach(function(f) {
|
|
f(event)
|
|
})
|
|
}
|
|
}
|
|
|
|
onZoomed(about) {
|
|
if (this.scaleAutoClose) this._updateTransparency()
|
|
|
|
if (this.onTransform != null) {
|
|
let event = new ScatterEvent(this, {
|
|
scale: this.scale,
|
|
about: about,
|
|
fast: false,
|
|
type: null
|
|
})
|
|
this.onTransform.forEach(function(f) {
|
|
f(event)
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
/** A container for scatter objects, which uses a single InteractionMapper
|
|
* for all children. This reduces the number of registered event handlers
|
|
* and covers the common use case that multiple objects are scattered
|
|
* on the same level.
|
|
*/
|
|
export class DOMScatterContainer {
|
|
/**
|
|
* @constructor
|
|
* @param {DOM node} element - DOM element that receives events
|
|
* @param {Bool} stopEvents - Whether events should be stopped or propagated
|
|
* @param {Bool} claimEvents - Whether events should be marked as claimed
|
|
* if findTarget return as non-null value.
|
|
* @param {String} [touchAction=none] - CSS to set touch action style, needed to prevent
|
|
* pointer cancel events. Use null if the
|
|
* the touch action should not be set.
|
|
* @param {DOM node} debugCanvas - Shows debug infos about touches if not null
|
|
*/
|
|
constructor(
|
|
element,
|
|
{
|
|
stopEvents = 'auto',
|
|
claimEvents = true,
|
|
useCapture = true,
|
|
capturePointerEvents = true,
|
|
touchAction = 'none',
|
|
debugCanvas = null
|
|
} = {}
|
|
) {
|
|
this.onCapture = null
|
|
this.element = element
|
|
if (stopEvents === 'auto') {
|
|
/*
|
|
The events have to be stopped in Safari, otherwise the whole page will be zoomed with
|
|
a pinch gesture (preventDefault in method preventPinch). In order to enable the
|
|
movement of scatter objects, the touchmove event has to be bound again.
|
|
*/
|
|
if (Capabilities.isSafari) {
|
|
document.addEventListener('touchmove', event => this.preventPinch(event), false)
|
|
stopEvents = false
|
|
} else {
|
|
stopEvents = true
|
|
}
|
|
}
|
|
this.stopEvents = stopEvents
|
|
this.claimEvents = claimEvents
|
|
if (touchAction !== null) {
|
|
Elements.setStyle(element, { touchAction })
|
|
}
|
|
this.scatter = new Map()
|
|
this.delegate = new InteractionMapper(element, this, {
|
|
useCapture,
|
|
capturePointerEvents,
|
|
mouseWheelElement: window
|
|
})
|
|
|
|
if (debugCanvas !== null) {
|
|
requestAnimationFrame(dt => {
|
|
this.showTouches(dt, debugCanvas)
|
|
})
|
|
}
|
|
}
|
|
|
|
showTouches(dt, canvas) {
|
|
let resolution = window.devicePixelRatio
|
|
let current = this.delegate.interaction.current
|
|
let context = canvas.getContext('2d')
|
|
let radius = 20 * resolution
|
|
context.clearRect(0, 0, canvas.width, canvas.height)
|
|
context.fillStyle = 'rgba(0, 0, 0, 0.3)'
|
|
context.lineWidth = 2
|
|
context.strokeStyle = '#003300'
|
|
for (let [key, point] of current.entries()) {
|
|
let local = point
|
|
context.beginPath()
|
|
context.arc(local.x * resolution, local.y * resolution, radius, 0, 2 * Math.PI, false)
|
|
context.fill()
|
|
context.stroke()
|
|
}
|
|
requestAnimationFrame(dt => {
|
|
this.showTouches(dt, canvas)
|
|
})
|
|
}
|
|
|
|
preventPinch(event) {
|
|
event = event.originalEvent || event
|
|
if (event.scale !== 1) {
|
|
event.preventDefault()
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Removes an element from the scatter.
|
|
*
|
|
* @param {Scatter} scatter - Element to remove.
|
|
* @memberof DOMScatterContainer
|
|
*/
|
|
remove(scatter) {
|
|
this.scatter.delete(scatter.element)
|
|
}
|
|
|
|
/**
|
|
* Adds an element to the ScatterContainer.
|
|
*
|
|
* @param {Scatter} scatter - Element to add to the ScatterContainer.
|
|
* @memberof DOMScatterContainer
|
|
*/
|
|
add(scatter) {
|
|
this.scatter.set(scatter.element, scatter)
|
|
}
|
|
|
|
capture(event) {
|
|
if (this.onCapture) {
|
|
return this.onCapture(event)
|
|
}
|
|
if (event.target == this.element && this.stopEvents) {
|
|
Events.stop(event)
|
|
}
|
|
return true
|
|
}
|
|
|
|
mapPositionToPoint(point) {
|
|
return Points.fromPageToNode(this.element, point)
|
|
}
|
|
|
|
isDescendant(parent, child, clickable = false) {
|
|
if (parent == child) return true
|
|
let node = child.parentNode
|
|
while (node != null) {
|
|
if (!clickable && node.onclick) {
|
|
return false
|
|
}
|
|
if (node == parent) {
|
|
return true
|
|
}
|
|
node = node.parentNode
|
|
}
|
|
return false
|
|
}
|
|
|
|
findTarget(event, local, global) {
|
|
/*** Note that elementFromPoint works with clientX, clientY, not pageX, pageY
|
|
The important point is that event should not be used, since the TouchEvent
|
|
points are hidden in sub objects.
|
|
***/
|
|
let found = document.elementFromPoint(global.x, global.y)
|
|
for (let target of this.scatter.values()) {
|
|
if (target.interactive && this.isDescendant(target.element, found)) {
|
|
if (this.stopEvents) Events.stop(event)
|
|
if (this.claimEvents) event.claimedByScatter = target
|
|
return target
|
|
}
|
|
}
|
|
return null
|
|
}
|
|
|
|
get center() {
|
|
let r = this.bounds
|
|
let w2 = r.width / 2
|
|
let h2 = r.height / 2
|
|
return { x: w2, y: h2 }
|
|
}
|
|
|
|
get bounds() {
|
|
return this.element.getBoundingClientRect()
|
|
}
|
|
|
|
get polygon() {
|
|
let r = this.bounds
|
|
let w2 = r.width / 2
|
|
let h2 = r.height / 2
|
|
let center = { x: w2, y: h2 }
|
|
let polygon = new Polygon(center)
|
|
polygon.addPoint({ x: -w2, y: -h2 })
|
|
polygon.addPoint({ x: w2, y: -h2 })
|
|
polygon.addPoint({ x: w2, y: h2 })
|
|
polygon.addPoint({ x: -w2, y: h2 })
|
|
return polygon
|
|
}
|
|
}
|
|
|
|
export class DOMScatter extends AbstractScatter {
|
|
constructor(
|
|
element,
|
|
container,
|
|
{
|
|
startScale = 1.0,
|
|
minScale = 0.1,
|
|
maxScale = 1.0,
|
|
overdoScaling = 1.5,
|
|
autoBringToFront = true,
|
|
translatable = true,
|
|
scalable = true,
|
|
rotatable = true,
|
|
movableX = true,
|
|
movableY = true,
|
|
rotationDegrees = null,
|
|
rotation = null,
|
|
onTransform = null,
|
|
transformOrigin = 'center center',
|
|
// extras which are in part needed
|
|
x = 0,
|
|
y = 0,
|
|
width = null, // required
|
|
height = null, // required
|
|
resizable = false,
|
|
tapDelegate = null,
|
|
triggerSVGClicks = false,
|
|
allowClickDistance = 44,
|
|
verbose = true,
|
|
onResize = null,
|
|
touchAction = 'none',
|
|
throwVisibility = 44,
|
|
throwDamping = 0.95,
|
|
autoThrow = true,
|
|
scaleAutoClose = false,
|
|
onClose = null,
|
|
scaleCloseThreshold = 0.1,
|
|
scaleCloseBuffer = 0.05,
|
|
useLowPassFilter = false,
|
|
maxRotation = Angle.degree2radian(15),
|
|
minInteractionDistance = 200
|
|
} = {}
|
|
) {
|
|
super({
|
|
minScale,
|
|
maxScale,
|
|
startScale,
|
|
overdoScaling,
|
|
autoBringToFront,
|
|
translatable,
|
|
scalable,
|
|
rotatable,
|
|
movableX,
|
|
movableY,
|
|
resizable,
|
|
rotationDegrees,
|
|
rotation,
|
|
onTransform,
|
|
throwVisibility,
|
|
throwDamping,
|
|
autoThrow,
|
|
scaleAutoClose,
|
|
scaleCloseThreshold,
|
|
scaleCloseBuffer,
|
|
onClose,
|
|
useLowPassFilter,
|
|
maxRotation,
|
|
minInteractionDistance
|
|
})
|
|
if (container == null || width == null || height == null) {
|
|
throw new Error('Invalid value: null')
|
|
}
|
|
element.scatter = this
|
|
this.element = element
|
|
this.x = x
|
|
this.y = y
|
|
this.oldX = 0
|
|
this.oldY = 0
|
|
this.meanX = x
|
|
this.meanY = y
|
|
this.width = width
|
|
this.height = height
|
|
this.throwVisibility = Math.min(width, height, throwVisibility)
|
|
this.container = container
|
|
this.tapDelegate = tapDelegate
|
|
this.scale = startScale
|
|
this.rotationDegrees = this.startRotationDegrees
|
|
this.transformOrigin = transformOrigin
|
|
this.initialValues = {
|
|
x: x,
|
|
y: y,
|
|
width: width,
|
|
height: height,
|
|
scale: startScale,
|
|
rotation: this.startRotationDegrees,
|
|
transformOrigin: transformOrigin
|
|
}
|
|
this.tapNodes = new Map()
|
|
|
|
// For tweenlite we need initial values in _gsTransform
|
|
TweenLite.set(element, this.initialValues)
|
|
this.onResize = onResize
|
|
this.verbose = verbose
|
|
if (touchAction !== null) {
|
|
Elements.setStyle(element, { touchAction })
|
|
}
|
|
this.resizeButton = null
|
|
if (resizable) {
|
|
let button = document.createElement('div')
|
|
button.style.position = 'absolute'
|
|
button.style.right = '0px'
|
|
button.style.bottom = '0px'
|
|
button.style.width = '50px'
|
|
button.style.height = '50px'
|
|
button.className = 'interactiveElement'
|
|
this.element.appendChild(button)
|
|
|
|
button.addEventListener('pointerdown', e => {
|
|
this.startResize(e)
|
|
})
|
|
|
|
button.addEventListener('pointermove', e => {
|
|
this.resize(e)
|
|
})
|
|
|
|
button.addEventListener('pointerup', e => {
|
|
this.stopResize(e)
|
|
})
|
|
this.resizeButton = button
|
|
}
|
|
if (tapDelegate) {
|
|
tapDelegate.handleClicks()
|
|
}
|
|
container.add(this)
|
|
}
|
|
|
|
/** Returns geometry data as object. **/
|
|
getState() {
|
|
return {
|
|
scale: this.scale,
|
|
x: this.x,
|
|
y: this.y,
|
|
rotation: this.rotation
|
|
}
|
|
}
|
|
|
|
close() {
|
|
super.close()
|
|
let parent = this.element.parentNode
|
|
if (parent) parent.removeChild(this.element)
|
|
}
|
|
|
|
get rotationOrigin() {
|
|
return this.center
|
|
}
|
|
|
|
get x() {
|
|
return this._x
|
|
}
|
|
|
|
get y() {
|
|
return this._y
|
|
}
|
|
|
|
set x(value) {
|
|
this._x = value
|
|
TweenLite.set(this.element, { x: value })
|
|
}
|
|
|
|
set y(value) {
|
|
this._y = value
|
|
TweenLite.set(this.element, { y: value })
|
|
}
|
|
|
|
get position() {
|
|
let transform = this.element._gsTransform
|
|
let x = transform.x
|
|
let y = transform.y
|
|
return { x, y }
|
|
}
|
|
|
|
get origin() {
|
|
let p = this.fromNodeToPage(0, 0)
|
|
return Points.fromPageToNode(this.container.element, p)
|
|
}
|
|
|
|
get bounds() {
|
|
let stage = this.container.element.getBoundingClientRect()
|
|
let rect = this.element.getBoundingClientRect()
|
|
return {
|
|
top: rect.top - stage.top,
|
|
left: rect.left - stage.left,
|
|
width: rect.width,
|
|
height: rect.height
|
|
}
|
|
}
|
|
|
|
get center() {
|
|
let r = this.bounds
|
|
let w2 = r.width / 2
|
|
let h2 = r.height / 2
|
|
// if (this.resizable) {
|
|
// w2 *= this.scale
|
|
// h2 *= this.scale
|
|
// }
|
|
var x = r.left + w2
|
|
var y = r.top + h2
|
|
return { x, y }
|
|
}
|
|
|
|
set rotation(radians) {
|
|
let rad = radians // Angle.normalize(radians)
|
|
let degrees = Angle.radian2degree(rad)
|
|
TweenLite.set(this.element, { rotation: degrees })
|
|
this._rotation = rad
|
|
}
|
|
|
|
set rotationDegrees(degrees) {
|
|
let deg = degrees // Angle.normalizeDegree(degrees)
|
|
TweenLite.set(this.element, { rotation: deg })
|
|
this._rotation = Angle.degree2radian(deg)
|
|
}
|
|
|
|
get rotation() {
|
|
return this._rotation
|
|
}
|
|
|
|
get rotationDegrees() {
|
|
return this._rotation
|
|
}
|
|
|
|
set scale(scale) {
|
|
TweenLite.set(this.element, {
|
|
scale: scale,
|
|
transformOrigin: this.transformOrigin
|
|
})
|
|
this._scale = scale
|
|
}
|
|
|
|
get scale() {
|
|
return this._scale
|
|
}
|
|
|
|
get containerBounds() {
|
|
return this.container.bounds
|
|
}
|
|
|
|
get containerPolygon() {
|
|
return this.container.polygon
|
|
}
|
|
|
|
mapPositionToContainerPoint(point) {
|
|
return this.container.mapPositionToPoint(point)
|
|
}
|
|
|
|
capture(event) {
|
|
return true
|
|
}
|
|
|
|
reset() {
|
|
TweenLite.set(this.element, this.initialValues)
|
|
}
|
|
|
|
hide() {
|
|
TweenLite.to(this.element, 0.1, {
|
|
display: 'none',
|
|
onComplete: e => {
|
|
this.element.parentNode.removeChild(this.element)
|
|
}
|
|
})
|
|
}
|
|
|
|
show() {
|
|
TweenLite.set(this.element, { display: 'block' })
|
|
}
|
|
|
|
showAt(p, rotationDegrees) {
|
|
TweenLite.set(this.element, {
|
|
display: 'block',
|
|
x: p.x,
|
|
y: p.y,
|
|
rotation: rotationDegrees,
|
|
transformOrigin: this.transformOrigin
|
|
})
|
|
}
|
|
|
|
bringToFront() {
|
|
// this.element.parentNode.appendChild(this.element)
|
|
// uo: On Chome and Electon appendChild leads to flicker
|
|
TweenLite.set(this.element, { zIndex: DOMScatter.zIndex++ })
|
|
}
|
|
|
|
isDescendant(parent, child) {
|
|
let node = child.parentNode
|
|
while (node != null) {
|
|
if (node == parent) {
|
|
return true
|
|
}
|
|
node = node.parentNode
|
|
}
|
|
return false
|
|
}
|
|
|
|
fromPageToNode(x, y) {
|
|
return Points.fromPageToNode(this.element, { x, y })
|
|
}
|
|
|
|
fromNodeToPage(x, y) {
|
|
return Points.fromNodeToPage(this.element, { x, y })
|
|
}
|
|
|
|
_move(delta) {
|
|
// UO: We need to keep TweenLite's _gsTransform and the private
|
|
// _x and _y attributes aligned
|
|
let x = this.element._gsTransform.x
|
|
let y = this.element._gsTransform.y
|
|
if (this.movableX) {
|
|
x += delta.x
|
|
}
|
|
if (this.movableY) {
|
|
y += delta.y
|
|
}
|
|
this._x = x
|
|
this._y = y
|
|
this.addVelocity({ x: delta.x, y: delta.y })
|
|
TweenLite.set(this.element, { x, y })
|
|
}
|
|
|
|
resizeAfterTransform(zoom) {
|
|
if (this.onResize) {
|
|
let w = this.width * this.scale
|
|
let h = this.height * this.scale
|
|
let event = new ResizeEvent(this, { width: w, height: h })
|
|
this.onResize(event)
|
|
}
|
|
}
|
|
|
|
startResize(e) {
|
|
e.preventDefault()
|
|
let event = new CustomEvent('resizeStarted')
|
|
|
|
let oldPostition = {
|
|
x: this.element.getBoundingClientRect().left,
|
|
y: this.element.getBoundingClientRect().top
|
|
}
|
|
this.bringToFront()
|
|
|
|
this.element.style.transformOrigin = '0% 0%'
|
|
|
|
let newPostition = {
|
|
x: this.element.getBoundingClientRect().left,
|
|
y: this.element.getBoundingClientRect().top
|
|
}
|
|
|
|
let offset = Points.subtract(oldPostition, newPostition)
|
|
|
|
this.oldX = e.clientX
|
|
this.oldY = e.clientY
|
|
|
|
e.target.setAttribute('resizing', 'true')
|
|
e.target.setPointerCapture(e.pointerId)
|
|
|
|
TweenLite.to(this.element, 0, { css: { left: '+=' + offset.x + 'px' } })
|
|
TweenLite.to(this.element, 0, { css: { top: '+=' + offset.y + 'px' } })
|
|
|
|
this.element.dispatchEvent(event)
|
|
}
|
|
|
|
resize(e) {
|
|
e.preventDefault()
|
|
|
|
let rotation = Angle.radian2degree(this.rotation)
|
|
rotation = (rotation + 360) % 360
|
|
let event = new CustomEvent('resized')
|
|
if (e.target.getAttribute('resizing') == 'true') {
|
|
let deltaX = e.clientX - this.oldX
|
|
let deltaY = e.clientY - this.oldY
|
|
|
|
let r = Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2))
|
|
let phi = Angle.radian2degree(Math.atan2(deltaX, deltaY))
|
|
|
|
phi = (phi + 630) % 360
|
|
let rot = (rotation + 90 + 630) % 360
|
|
|
|
let diffAngle = (0 + rot + 360) % 360
|
|
let phiCorrected = (phi + diffAngle + 360) % 360
|
|
|
|
let resizeW = r * Math.cos(Angle.degree2radian(phiCorrected))
|
|
let resizeH = -r * Math.sin(Angle.degree2radian(phiCorrected))
|
|
|
|
if (
|
|
(this.element.offsetWidth + resizeW) / this.scale > (this.width * 0.5) / this.scale &&
|
|
(this.element.offsetHeight + resizeH) / this.scale > (this.height * 0.3) / this.scale
|
|
)
|
|
TweenLite.to(this.element, 0, {
|
|
width: this.element.offsetWidth + resizeW / this.scale,
|
|
height: this.element.offsetHeight + resizeH / this.scale
|
|
})
|
|
|
|
this.oldX = e.clientX
|
|
this.oldY = e.clientY
|
|
this.onResizing()
|
|
|
|
this.element.dispatchEvent(event)
|
|
}
|
|
}
|
|
|
|
stopResize(e) {
|
|
e.preventDefault()
|
|
|
|
let event = new CustomEvent('resizeEnded')
|
|
let oldPostition = {
|
|
x: this.element.getBoundingClientRect().left,
|
|
y: this.element.getBoundingClientRect().top
|
|
}
|
|
this.element.style.transformOrigin = '50% 50%'
|
|
let newPostition = {
|
|
x: this.element.getBoundingClientRect().left,
|
|
y: this.element.getBoundingClientRect().top
|
|
}
|
|
let offset = Points.subtract(oldPostition, newPostition)
|
|
|
|
TweenLite.to(this.element, 0, { css: { left: '+=' + offset.x + 'px' } })
|
|
TweenLite.to(this.element, 0, { css: { top: '+=' + offset.y + 'px' } })
|
|
|
|
e.target.setAttribute('resizing', 'false')
|
|
|
|
this.element.dispatchEvent(event)
|
|
}
|
|
}
|
|
|
|
DOMScatter.zIndex = 1000
|