mirror of
https://github.com/morrisjs/morris.js.git
synced 2024-09-21 18:51:32 +02:00
382 lines
10 KiB
CoffeeScript
382 lines
10 KiB
CoffeeScript
class Morris.Grid extends Morris.EventEmitter
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# A generic pair of axes for line/area/bar charts.
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#
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# Draws grid lines and axis labels.
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#
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constructor: (options) ->
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# find the container to draw the graph in
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if typeof options.element is 'string'
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@el = $ document.getElementById(options.element)
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else
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@el = $ options.element
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if not @el? or @el.length == 0
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throw new Error("Graph container element not found")
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@options = $.extend {}, @gridDefaults, (@defaults || {}), options
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# bail if there's no data
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if @options.data is undefined or @options.data.length is 0
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return
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# backwards compatibility for units -> postUnits
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if typeof @options.units is 'string'
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@options.postUnits = options.units
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# the raphael drawing instance
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@r = new Raphael(@el[0])
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# some redraw stuff
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@elementWidth = null
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@elementHeight = null
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@dirty = false
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# more stuff
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@init() if @init
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# load data
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@setData @options.data
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# hover
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unless @options.hideHover is 'always'
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@hover = new Morris.Hover
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parent: @el
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@initHover()
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@postInit() if @postInit
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# Default options
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#
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gridDefaults:
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dateFormat: null
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gridLineColor: '#aaa'
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gridStrokeWidth: 0.5
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gridTextColor: '#888'
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gridTextSize: 12
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hideHover: false
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numLines: 5
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padding: 25
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parseTime: true
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postUnits: ''
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preUnits: ''
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ymax: 'auto'
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ymin: 'auto 0'
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goals: []
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goalStrokeWidth: 1.0
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goalLineColors: [
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'#666633'
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'#999966'
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'#cc6666'
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'#663333'
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]
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events: []
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eventStrokeWidth: 1.0
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eventLineColors: [
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'#005a04'
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'#ccffbb'
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'#3a5f0b'
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'#005502'
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]
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# Update the data series and redraw the chart.
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#
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setData: (data, redraw = true) ->
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ymax = if @cumulative then 0 else null
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ymin = if @cumulative then 0 else null
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if @options.goals.length > 0
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minGoal = Math.min.apply(null, @options.goals)
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maxGoal = Math.max.apply(null, @options.goals)
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ymin = if ymin? then Math.min(ymin, minGoal) else minGoal
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ymax = if ymax? then Math.max(ymax, maxGoal) else maxGoal
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@data = for row, index in data
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ret = {}
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ret.label = row[@options.xkey]
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if @options.parseTime
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ret.x = Morris.parseDate(ret.label)
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if @options.dateFormat
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ret.label = @options.dateFormat ret.x
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else if typeof ret.label is 'number'
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ret.label = new Date(ret.label).toString()
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else
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ret.x = index
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total = 0
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ret.y = for ykey, idx in @options.ykeys
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yval = row[ykey]
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yval = parseFloat(yval) if typeof yval is 'string'
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yval = null if yval? and typeof yval isnt 'number'
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if yval?
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if @cumulative
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total += yval
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else
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if ymax?
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ymax = Math.max(yval, ymax)
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ymin = Math.min(yval, ymin)
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else
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ymax = ymin = yval
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if @cumulative and total?
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ymax = Math.max(total, ymax)
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ymin = Math.min(total, ymin)
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yval
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ret
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if @options.parseTime
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@data = @data.sort (a, b) -> (a.x > b.x) - (b.x > a.x)
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# calculate horizontal range of the graph
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@xmin = @data[0].x
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@xmax = @data[@data.length - 1].x
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@events = []
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if @options.parseTime and @options.events.length > 0
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@events = (Morris.parseDate(e) for e in @options.events)
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@xmax = Math.max(@xmax, Math.max.apply(null, @events))
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@xmin = Math.min(@xmin, Math.min.apply(null, @events))
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if @xmin is @xmax
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@xmin -= 1
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@xmax += 1
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# Compute the vertical range of the graph if desired
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if typeof @options.ymax is 'string'
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if @options.ymax[0..3] is 'auto'
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# use Array.concat to flatten arrays and find the max y value
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if @options.ymax.length > 5
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@ymax = parseInt(@options.ymax[5..], 10)
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@ymax = Math.max(ymax, @ymax) if ymax?
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else
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@ymax = if ymax? then ymax else 0
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else
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@ymax = parseInt(@options.ymax, 10)
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else
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@ymax = @options.ymax
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if typeof @options.ymin is 'string'
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if @options.ymin[0..3] is 'auto'
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if @options.ymin.length > 5
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@ymin = parseInt(@options.ymin[5..], 10)
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@ymin = Math.min(ymin, @ymin) if ymin?
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else
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@ymin = if ymin isnt null then ymin else 0
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else
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@ymin = parseInt(@options.ymin, 10)
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else
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@ymin = @options.ymin
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if @ymin is @ymax
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@ymin -= 1 if ymin
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@ymax += 1
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@yInterval = (@ymax - @ymin) / (@options.numLines - 1)
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if @yInterval > 0 and @yInterval < 1
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@precision = -Math.floor(Math.log(@yInterval) / Math.log(10))
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else
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@precision = 0
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@dirty = true
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@redraw() if redraw
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_calc: ->
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w = @el.width()
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h = @el.height()
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if @elementWidth != w or @elementHeight != h or @dirty
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@elementWidth = w
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@elementHeight = h
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@dirty = false
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# calculate grid dimensions
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maxYLabelWidth = Math.max(
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@measureText(@yAxisFormat(@ymin), @options.gridTextSize).width,
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@measureText(@yAxisFormat(@ymax), @options.gridTextSize).width)
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@left = maxYLabelWidth + @options.padding
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@right = @elementWidth - @options.padding
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@top = @options.padding
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@bottom = @elementHeight - @options.padding - 1.5 * @options.gridTextSize
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@width = @right - @left
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@height = @bottom - @top
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@dx = @width / (@xmax - @xmin)
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@dy = @height / (@ymax - @ymin)
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@calc() if @calc
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# Quick translation helpers
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#
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transY: (y) -> @bottom - (y - @ymin) * @dy
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transX: (x) ->
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if @data.length == 1
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(@left + @right) / 2
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else
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@left + (x - @xmin) * @dx
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# Draw it!
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#
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# If you need to re-size your charts, call this method after changing the
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# size of the container element.
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redraw: ->
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@r.clear()
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@_calc()
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@drawGrid()
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@drawGoals()
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@drawEvents()
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@draw() if @draw
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# draw goals horizontal lines
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#
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drawGoals: ->
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for goal, i in @options.goals
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@r.path("M#{@left},#{@transY(goal)}H#{@left + @width}")
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.attr('stroke', @options.goalLineColors[i % @options.goalLineColors.length])
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.attr('stroke-width', @options.goalStrokeWidth)
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# draw events vertical lines
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drawEvents: ->
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for event, i in @events
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@r.path("M#{@transX(event)},#{@bottom}V#{@top}")
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.attr('stroke', @options.eventLineColors[i % @options.eventLineColors.length])
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.attr('stroke-width', @options.eventStrokeWidth)
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# draw y axis labels, horizontal lines
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#
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drawGrid: ->
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firstY = @ymin
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lastY = @ymax
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for lineY in [firstY..lastY] by @yInterval
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v = parseFloat(lineY.toFixed(@precision))
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y = @transY(v)
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@r.text(@left - @options.padding / 2, y, @yAxisFormat(v))
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.attr('font-size', @options.gridTextSize)
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.attr('fill', @options.gridTextColor)
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.attr('text-anchor', 'end')
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@r.path("M#{@left},#{y}H#{@left + @width}")
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.attr('stroke', @options.gridLineColor)
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.attr('stroke-width', @options.gridStrokeWidth)
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# @private
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#
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measureText: (text, fontSize = 12) ->
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tt = @r.text(100, 100, text).attr('font-size', fontSize)
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ret = tt.getBBox()
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tt.remove()
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ret
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# @private
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#
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yAxisFormat: (label) -> @yLabelFormat(label)
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# @private
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#
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yLabelFormat: (label) ->
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"#{@options.preUnits}#{Morris.commas(label)}#{@options.postUnits}"
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# Hover stuff
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#
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#
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initHover: ->
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if @hover?
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@el.bind 'mousemove', (evt) =>
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@updateHover evt.pageX, evt.pageY
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if @options.hideHover
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@el.bind 'mouseout', (evt) =>
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@hover.hide()
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@el.bind 'touchstart touchmove touchend', (evt) =>
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touch = evt.originalEvent.touches[0] or evt.originalEvent.changedTouches[0]
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@updateHover touch.pageX, touch.pageY
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return touch
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hitTest: (x, y) -> null
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updateHover: (x, y) ->
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offset = @el.offset()
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x -= offset.left
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y -= offset.top
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hit = hitTest(x, y)
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if hit?
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@hover.update(hit...)
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# Parse a date into a javascript timestamp
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#
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#
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Morris.parseDate = (date) ->
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if typeof date is 'number'
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return date
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m = date.match /^(\d+) Q(\d)$/
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n = date.match /^(\d+)-(\d+)$/
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o = date.match /^(\d+)-(\d+)-(\d+)$/
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p = date.match /^(\d+) W(\d+)$/
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q = date.match /^(\d+)-(\d+)-(\d+)[ T](\d+):(\d+)(Z|([+-])(\d\d):?(\d\d))?$/
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r = date.match /^(\d+)-(\d+)-(\d+)[ T](\d+):(\d+):(\d+(\.\d+)?)(Z|([+-])(\d\d):?(\d\d))?$/
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if m
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new Date(
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parseInt(m[1], 10),
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parseInt(m[2], 10) * 3 - 1,
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1).getTime()
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else if n
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new Date(
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parseInt(n[1], 10),
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parseInt(n[2], 10) - 1,
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1).getTime()
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else if o
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new Date(
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parseInt(o[1], 10),
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parseInt(o[2], 10) - 1,
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parseInt(o[3], 10)).getTime()
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else if p
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# calculate number of weeks in year given
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ret = new Date(parseInt(p[1], 10), 0, 1);
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# first thursday in year (ISO 8601 standard)
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if ret.getDay() isnt 4
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ret.setMonth(0, 1 + ((4 - ret.getDay()) + 7) % 7);
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# add weeks
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ret.getTime() + parseInt(p[2], 10) * 604800000
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else if q
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if not q[6]
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# no timezone info, use local
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new Date(
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parseInt(q[1], 10),
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parseInt(q[2], 10) - 1,
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parseInt(q[3], 10),
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parseInt(q[4], 10),
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parseInt(q[5], 10)).getTime()
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else
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# timezone info supplied, use UTC
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offsetmins = 0
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if q[6] != 'Z'
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offsetmins = parseInt(q[8], 10) * 60 + parseInt(q[9], 10)
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offsetmins = 0 - offsetmins if q[7] == '+'
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Date.UTC(
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parseInt(q[1], 10),
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parseInt(q[2], 10) - 1,
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parseInt(q[3], 10),
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parseInt(q[4], 10),
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parseInt(q[5], 10) + offsetmins)
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else if r
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secs = parseFloat(r[6])
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isecs = Math.floor(secs)
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msecs = Math.round((secs - isecs) * 1000)
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if not r[8]
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# no timezone info, use local
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new Date(
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parseInt(r[1], 10),
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parseInt(r[2], 10) - 1,
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parseInt(r[3], 10),
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parseInt(r[4], 10),
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parseInt(r[5], 10),
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isecs,
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msecs).getTime()
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else
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# timezone info supplied, use UTC
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offsetmins = 0
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if r[8] != 'Z'
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offsetmins = parseInt(r[10], 10) * 60 + parseInt(r[11], 10)
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offsetmins = 0 - offsetmins if r[9] == '+'
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Date.UTC(
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parseInt(r[1], 10),
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parseInt(r[2], 10) - 1,
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parseInt(r[3], 10),
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parseInt(r[4], 10),
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parseInt(r[5], 10) + offsetmins,
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isecs,
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msecs)
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else
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new Date(parseInt(date, 10), 0, 1).getTime()
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