iwmlib/lib/pixi/maps/geolayer.js

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import { GeoMap } from './map.js'
import { EventHandler } from './utils.js'
import { GeoGraphics } from './geographics.js'
import { MapList } from './maplist.js'
import MapViewport from './mapviewport.js'
import { ScatterContainer } from '../scatter.js'
/**
* The GeoLayer is a special PIXILayer, that recognizes other GeoLayers and
* GeoGraphics. The layer can be adapted to a map and notifies all Geo-Children
* of the Adaption.
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*
* @export
* @class GeoLayer
*/
export class GeoLayer {
constructor(displayObject, opts = {}) {
if (displayObject == null || !(displayObject instanceof PIXI.DisplayObject)) {
console.error(
`You need to provide a displayObject to make a ${this.constructor.name} out of it.`,
displayObject
)
return null
} else {
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this.geographics = []
// displayObject.map = this
this.displayObject = displayObject
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this.pixiAddChild = displayObject.addChild.bind(displayObject)
displayObject.addChild = (...elements) => {
elements.forEach(element => {
if (element instanceof GeoGraphics) {
element.setLayer(this)
this.geographics.push(element)
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this.pixiAddChild(element.graphics)
} else {
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this.pixiAddChild(element)
}
})
}
}
this.name = opts['name'] != null ? opts.name : 'Unnamed Layer'
this.parent = null
this.parentMapLayerTransformedHandler = new EventHandler('onParentMapLayerTransformed')
this.layers = []
this._visibility = { min: 0, max: Number.MAX_VALUE }
}
parentMapLayerTransformed(mapLayer) {
this.layers.forEach(layer => {
if (!(layer instanceof MapList)) {
layer.parentMapLayerTransformed()
}
})
this.parentMapLayerTransformedHandler.call(null, mapLayer)
this.rescaleChildren()
}
rescaleChildren() {
let map = this.map
if (this.rescale) {
if (map != null) {
let scale = map.image.scatter.scale
this.displayObject.children.forEach(graphics => {
graphics.scale.set(1 / scale, 1 / scale)
})
}
}
let mapLayer = this.mapLayer
if (this.visibility && mapLayer != null) {
const zoom = mapLayer.mapview.zoom
// TODO
// Currently I dont know what elemnts was.
// We just log an error and resolve this on a later point.
if (zoom > this.visibility.min && zoom < this.visibility.max) {
this.displayObject.children.forEach(it => (it.visible = true))
} else {
this.displayObject.children.forEach(it => (it.visible = false))
}
}
}
set visibility(value) {
let { min = 0, max = Infinity } = value
this._visibility = { min, max }
}
get visibility() {
return this._visibility
}
/**
* Alias for geoLayer.displayObject.addChild.
*
* @public
* @param {GeoGraphics | PIXI.DisplayObject} element - Element to add to the displayObject.
* @memberof GeoLayer
*/
addChild(element) {
this.displayObject.addChild(element)
}
/**
* Adapts to a map. If the maplayer should adapt to the parent maplayer,
* no parameter must be specified.
*/
adapt(map = null) {
if (!map) map = this.map
if (map) {
this.geographics.forEach(geographic => {
geographic.adaptTo(map)
})
this.layers.forEach(layer => {
if (layer.adapt) layer.adapt(map)
})
this.rescaleChildren()
} else console.error('There was no map specified.', this)
}
removeFromParent() {
if (this.parent) {
this.parent.removeLayer(this)
}
}
removeLayer(layer) {
let idx = this.layers.indexOf(layer)
if (idx != -1) {
layer.parent = null
this.layers.splice(idx, 1)
if (layer.displayObject.parent) {
layer.displayObject.parent.removeChild(layer.displayObject)
}
} else console.warn('Tried to remove layer that was not set.', this, layer)
}
remove(graphics) {
if (graphics instanceof GeoGraphics) {
let index = this.geographics.indexOf(geographics)
if (index != -1) {
this.displayObject.removeChild(geographics)
} else {
console.error('Could not remove geographics from geolayer.', this, geographics)
}
} else {
this.displayObject.removeChild(graphics)
}
}
set parent(parent) {
this._parent = parent
}
get parent() {
return this._parent
}
/**
* Adds a GeoLayer as child to the GeoLayer.
*
* @public
* @param {GeoLayer} layer - GeoLayer to add.
* @memberof GeoLayer
*/
addLayer(layer) {
if (layer instanceof GeoLayer) {
layer.removeFromParent()
this.layers.push(layer)
layer.parent = this
layer.parentChanged()
this.displayObject.addChild(layer.displayObject)
if (this.map) layer.geographics.forEach(geographics => geographics.adaptTo(this.map))
} else
console.error('Could not place layer. Only MapLayer and GeoLayers can be child layers of GeoLayers.', layer)
}
parentChanged() {
this.rescaleChildren()
}
//GeoLayers have to be children of a map layer,
// therefore we can recursively get the map.
get map() {
return this.mapLayer ? this.mapLayer.map : null
}
get mapLayer() {
return this._mapLayer ? this._mapLayer : this.parent.mapLayer
}
// clone(mapLayerClone) {
// const opts = {
// mapLayer: mapLayerClone,
// map: mapLayerClone.map
// }
// let geoLayerClone = new GeoLayer(opts)
// this.layers.forEach(layer => {
// let layerClone = layer.clone(opts)
// if (layerClone) {
// geoLayerClone.placeLayer(layerClone)
// }
// })
// this.geographics.forEach(geographics => {
// let clone = geographics.clone()
// if (clone) {
// geoLayerClone.place(clone)
// }
// })
// return geoLayerClone
// }
}
/**
* The map layer is responsible for showing certain maps, at a specific position It contains
* a list of available maps and can switch between them seamlessly. GeoGraphics placed on the MapLayer itself
* or child Geolayers will be adapted to maps and adjusted on map change automatically.
*
* The map layer is the 'king' of the geo layers. Every geolayer
* needs a map layer at it's root. Otherwise they won't work-
*
* @export
* @class MapLayer
* @extends {GeoLayer}
*/
export class MapLayer extends GeoLayer {
constructor(
mapList,
scatterContainer,
displayObject,
{
onTransform = null,
onChange = null,
focus = null,
zoom = null,
viewport = null,
name = null,
mapChangeLocked = false
} = {}
) {
super(displayObject, {
name
})
this.transformHandler = new EventHandler('onTransform', {
listeners: onTransform
})
this.scatterContainer = scatterContainer
this.changeHandler = new EventHandler('onChange', {
listeners: onChange
})
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this._mapview = new MapViewport({
zoom,
focus,
viewport
})
this.mapList = mapList
// //TODO Implement error handling here.
// this.maps = maps
// if (opts.map) this.placeMap(opts.map)
this.dynamicElements = new Map()
this._mapChangeLocked = mapChangeLocked
// Binds the transformed callback beforehand.
this.transformed = this.transformed.bind(this)
this.changeMap(mapList.active)
}
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//Todo: rename to mapviewport.
/**
* Returns the MapViewport of this map layer.
*
* @readonly
* @member {MapViewport}
* @memberof MapLayer
*/
get mapview() {
return this._mapview
}
get mapChangeLocked() {
return this._mapChangeLocked
}
lockMapChange() {
this._mapChangeLocked = true
}
unlockMapChange() {
this._mapChangeLocked = false
}
/**
* Adapts all child layers and their GeoGraphics.
*
* This is called primarily on a map change.
*
* @private
* @memberof MapLayer
*/
adapt() {
this.layers.forEach(layer => {
if (layer.adapt) layer.adapt(this.map)
})
}
transformed(e) {
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this.mapview.update(this.map)
this.layers.forEach(layer => layer.parentMapLayerTransformed(this))
this.transformHandler.call(this)
}
/**
* Clones the map layer-
*
* @param {ScatterContainer} scatterContainer - ScatterContainer of the app.
* @param {PIXI.DisplayObject} [container=null] - Container of the newly created MapLayer. If null, an empty PIXI.Container will be created.
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* @returns {MapLayer} - Returns the cloned MapLayer.
* @memberof MapLayer
*/
clone(scatterContainer, container = null) {
let mapList = this.mapList.clone()
container = container == null ? new PIXI.Container() : container
let mapLayerClone = new MapLayer(mapList, scatterContainer, container, {
name: MapLayer.idx++,
viewport: this.mapview.viewport,
focus: this.mapview.focus,
zoom: this.mapview.zoom,
mapList
})
mapLayerClone.childrenVisibility = this.childrenVisibility
return mapLayerClone
}
/**
* Helper function to quickly display the next map.
* Order is defined by the key ordering of the maplist.
*
* @memberof MapLayer
*/
next() {
let nextMap = this.mapList.next()
this.changeMap(nextMap)
}
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/**
* Changes the map to the specified one, keeping the position and the zoom of the old map.
*
* @public
* @param {GeoMap} map
* @memberof MapLayer
*/
changeMap(
name
/* map ,
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useScatterAsContainer = true // If set to false, the normal container is used. This is necessary when using submaps and the container need to be a RigidContainer.*/
) {
if (!this.mapChangeLocked) {
console.log('🗺️ Change map to: ', name)
let oldMap = this.map
this.mapList.select(name)
if (oldMap) {
oldMap.unload()
oldMap.onTransform.remove(this.transformed)
}
let map = this.map
if (map) {
map.load()
this.scatterContainer.addChild(map.image)
this.mapview.apply(map)
map.image.addChild(this.displayObject)
// A geolayer's displayObject is on the parent layer.
// A maplayer's displayobject is always the child of the map.
this.adapt()
this.changeHandler.call(this, map, oldMap)
//Call transform one time manually.
this.transformed()
map.onTransform.add(this.transformed)
} else {
console.error(`Could not change map to ${name}.`)
}
}
}
/**
* Applies the mapviews focus to the map.
* This may be useful, if the container was modified.
*
* @memberof MapLayer
*/
refocus() {
this.mapview.apply(this.map)
}
/**
* @public
* @returns {GeoMap} - Returns the active map.
* @readonly
* @memberof MapLayer
*/
get map() {
return this.mapList.map
}
/**
*
* This is required for the geo layers.
* MapLayer requests from the geoLayers traverse up to the next MapLayer.
*
* @public
* @returns {MapLayer} - Returns this MapLayer.
* @readonly
* @memberof MapLayer
*/
get mapLayer() {
return this
}
/**
* Cleans up the MapLayer.
*
* @public
* @memberof MapLayer
*/
cleanup() {
this.mapList.cleanup()
}
}
MapLayer.idx = 0