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68 lines
2.5 KiB
CoffeeScript
68 lines
2.5 KiB
CoffeeScript
CocoClass = require 'lib/CocoClass'
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Camera = require './Camera'
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module.exports = class RegionChooser extends CocoClass
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constructor: (@options) ->
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super()
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@options.stage.addEventListener 'stagemousedown', @onMouseDown
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@options.stage.addEventListener 'stagemousemove', @onMouseMove
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@options.stage.addEventListener 'stagemouseup', @onMouseUp
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destroy: ->
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@options.stage.removeEventListener 'stagemousedown', @onMouseDown
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@options.stage.removeEventListener 'stagemousemove', @onMouseMove
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@options.stage.removeEventListener 'stagemouseup', @onMouseUp
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super()
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onMouseDown: (e) =>
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return unless key.shift
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@firstPoint = @options.camera.screenToWorld {x: e.stageX, y: e.stageY}
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@options.camera.dragDisabled = true
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onMouseMove: (e) =>
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return unless @firstPoint
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@secondPoint = @options.camera.screenToWorld {x: e.stageX, y: e.stageY}
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@restrictRegion() if @options.restrictRatio or key.alt
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@updateShape()
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onMouseUp: (e) =>
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return unless @firstPoint
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Backbone.Mediator.publish 'surface:choose-region', points: [@firstPoint, @secondPoint]
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@firstPoint = null
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@secondPoint = null
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@options.camera.dragDisabled = false
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restrictRegion: ->
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RATIO = 1.56876 # 924 / 589
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rect = @options.camera.normalizeBounds([@firstPoint, @secondPoint])
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currentRatio = rect.width / rect.height
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if currentRatio > RATIO
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# increase the height
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targetSurfaceHeight = rect.width / RATIO
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targetWorldHeight = targetSurfaceHeight * Camera.MPP * @options.camera.x2y
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targetWorldHeight *= -1 if @secondPoint.y < @firstPoint.y
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@secondPoint.y = @firstPoint.y + targetWorldHeight
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else
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# increase the width
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targetSurfaceWidth = rect.height * RATIO
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targetWorldWidth = targetSurfaceWidth * Camera.MPP
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targetWorldWidth *= -1 if @secondPoint.x < @firstPoint.x
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@secondPoint.x = @firstPoint.x + targetWorldWidth
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# Called from WorldSelectModal
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setRegion: (worldPoints) ->
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@firstPoint = worldPoints[0]
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@secondPoint = worldPoints[1]
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@updateShape()
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@firstPoint = null
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@secondPoint = null
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updateShape: ->
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rect = @options.camera.normalizeBounds([@firstPoint, @secondPoint])
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@options.surfaceLayer.removeChild @shape if @shape
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@shape = new createjs.Shape()
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@shape.alpha = 0.5
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@shape.mouseEnabled = false
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@shape.graphics.beginFill('#fedcba').drawRect rect.x, rect.y, rect.width, rect.height
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@shape.graphics.endFill()
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@options.surfaceLayer.addChild(@shape)
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