codecombat/app/lib/surface/Dimmer.coffee

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2014-01-03 13:32:13 -05:00
CocoClass = require 'lib/CocoClass'
module.exports = class Dimmer extends CocoClass
subscriptions:
'level-disable-controls': 'onDisableControls'
'level-enable-controls': 'onEnableControls'
'level-highlight-sprites': 'onHighlightSprites'
'sprite:speech-updated': 'onSpriteSpeechUpdated'
'surface:frame-changed': 'onFrameChanged'
'camera:zoom-updated': 'onZoomUpdated'
constructor: (options) ->
super()
options ?= {}
@camera = options.camera
@layer = options.layer
console.error @toString(), "needs a camera." unless @camera
console.error @toString(), "needs a layer." unless @layer
@build()
@updateDimMask = _.throttle @updateDimMask, 10
@highlightedThangIDs = []
@sprites = {}
destroy: ->
super()
toString: -> "<Dimmer>"
build: ->
@dimLayer = new createjs.Container()
@dimLayer.mouseEnabled = @dimLayer.mouseChildren = false
@dimLayer.layerIndex = -10
@dimLayer.addChild @dimScreen = new createjs.Shape()
@dimLayer.addChild @dimMask = new createjs.Shape()
@dimScreen.graphics.beginFill("rgba(0,0,0,0.5)").rect 0, 0, @camera.canvasWidth, @camera.canvasHeight
@dimMask.compositeOperation = 'destination-out'
@dimLayer.cache 0, 0, @camera.canvasWidth, @camera.canvasHeight
onDisableControls: (e) ->
return if @on or (e.controls and not ('surface' in e.controls))
@dim()
onEnableControls: (e) ->
return if not @on or (e.controls and not ('surface' in e.controls))
@undim()
onSpriteSpeechUpdated: (e) -> @updateDimMask() if @on
onFrameChanged: (e) -> @updateDimMask() if @on
onZoomUpdated: (e) -> @updateDimMask() if @on
onHighlightSprites: (e) ->
@highlightedThangIDs = e.thangIDs ? []
@updateDimMask() if @on
setSprites: (@sprites) ->
console.log
dim: ->
@on = true
@layer.addChild @dimLayer
@layer.updateLayerOrder()
sprite.setDimmed true for thangID, sprite of @sprites
@updateDimMask()
undim: ->
@on = false
@layer.removeChild @dimLayer
sprite.setDimmed false for thangID, sprite of @sprites
updateDimMask: =>
@dimMask.graphics.clear()
for thangID, sprite of @sprites
continue unless (thangID in @highlightedThangIDs) or sprite.isTalking?() or sprite.thang?.id is 'My Wizard'
sup = x: sprite.displayObject.x, y: sprite.displayObject.y
cap = @camera.surfaceToCanvas sup
r = 50 * @camera.zoom # TODO: find better way to get the radius based on the sprite's size
@dimMask.graphics.beginRadialGradientFill(["rgba(0,0,0,1)", "rgba(0,0,0,0)"], [0.5, 1], cap.x, cap.y, 0, cap.x, cap.y, r).drawCircle(cap.x, cap.y, r)
@dimLayer.updateCache 0, 0, @camera.canvasWidth, @camera.canvasHeight