344 lines
11 KiB
CoffeeScript
344 lines
11 KiB
CoffeeScript
class Morris.Line extends Morris.Grid
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# Initialise the graph.
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#
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constructor: (options) ->
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return new Morris.Line(options) unless (@ instanceof Morris.Line)
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super(options)
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init: ->
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# Some instance variables for later
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@pointGrow = Raphael.animation r: @options.pointSize + 3, 25, 'linear'
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@pointShrink = Raphael.animation r: @options.pointSize, 25, 'linear'
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# column hilight events
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if @options.hilight
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@prevHilight = null
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@el.mousemove (evt) =>
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@updateHilight evt.pageX
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if @options.hilightAutoHide
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@el.mouseout (evt) =>
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@hilight null
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touchHandler = (evt) =>
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touch = evt.originalEvent.touches[0] or evt.originalEvent.changedTouches[0]
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@updateHilight touch.pageX
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return touch
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@el.bind 'touchstart', touchHandler
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@el.bind 'touchmove', touchHandler
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@el.bind 'touchend', touchHandler
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# Default configuration
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#
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defaults:
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lineWidth: 3
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pointSize: 4
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lineColors: [
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'#0b62a4'
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'#7A92A3'
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'#4da74d'
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'#afd8f8'
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'#edc240'
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'#cb4b4b'
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'#9440ed'
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]
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pointWidths: [1]
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pointStrokeColors: ['#ffffff']
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pointFillColors: []
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smooth: true
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hilight: true
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hilightAutoHide: false
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xLabels: 'auto'
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xLabelFormat: null
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continuousLine: true
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# Do any size-related calculations
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#
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# @private
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calc: ->
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@calcPoints()
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@generatePaths()
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@calcHilightMargins()
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# calculate series data point coordinates
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#
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# @private
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calcPoints: ->
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for row in @data
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row._x = @transX(row.x)
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row._y = for y in row.y
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if y? then @transY(y) else y
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row._ymax = Math.min.apply(null, [@bottom].concat(y for y in row._y when y?))
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# calculate hilight margins
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#
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# @private
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calcHilightMargins: ->
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@hilightMargins = ((r._x + @data[i]._x) / 2 for r, i in @data.slice(1))
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# hover element hit test
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#
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# @private
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hitTest: (x, y) ->
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# TODO better search algo
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for r, i in @data.slice(1)
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break if x < (r._x + @data[i]._x) / 2
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@hoverFor(i)
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# hover content for a point
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#
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# @private
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hoverFor: (index) ->
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row = @data[index]
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content = "<div class='morris-hover-row-label'>#{row.label}</div>"
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for y, j in row.y
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content += """
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<div class='morris-hover-point' style='color: #{@colorFor(row, j, 'label')}'>
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#{@options.labels[j]}:
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#{@yLabelFormat(y)}
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</div>
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"""
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[content, row._x, row._ymax]
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# generate paths for series lines
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#
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# @private
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generatePaths: ->
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@paths = for i in [0...@options.ykeys.length]
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smooth = @options.smooth is true or @options.ykeys[i] in @options.smooth
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coords = ({x: r._x, y: r._y[i]} for r in @data when r._y[i] isnt undefined)
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coords = (c for c in coords when c.y isnt null) if @options.continuousLine
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if coords.length > 1
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Morris.Line.createPath coords, smooth, @bottom
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else
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null
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# Draws the line chart.
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#
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draw: ->
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@drawXAxis()
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@drawSeries()
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@hilight(if @options.hilightAutoHide then null else @data.length - 1) if @options.hilight
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# draw the x-axis labels
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#
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# @private
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drawXAxis: ->
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# draw x axis labels
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ypos = @bottom + @options.gridTextSize * 1.25
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xLabelMargin = 50 # make this an option?
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prevLabelMargin = null
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drawLabel = (labelText, xpos) =>
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label = @r.text(@transX(xpos), ypos, labelText)
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.attr('font-size', @options.gridTextSize)
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.attr('fill', @options.gridTextColor)
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labelBox = label.getBBox()
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# ensure a minimum of `xLabelMargin` pixels between labels, and ensure
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# labels don't overflow the container
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if (not prevLabelMargin? or prevLabelMargin >= labelBox.x + labelBox.width) and
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labelBox.x >= 0 and (labelBox.x + labelBox.width) < @el.width()
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prevLabelMargin = labelBox.x - xLabelMargin
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else
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label.remove()
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if @options.parseTime
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if @data.length == 1 and @options.xLabels == 'auto'
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# where there's only one value in the series, we can't make a
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# sensible guess for an x labelling scheme, so just use the original
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# column label
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labels = [[@data[0].label, @data[0].x]]
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else
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labels = Morris.labelSeries(@xmin, @xmax, @width, @options.xLabels, @options.xLabelFormat)
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else
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labels = ([row.label, row.x] for row in @data)
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labels.reverse()
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for l in labels
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drawLabel(l[0], l[1])
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# draw the data series
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#
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# @private
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drawSeries: ->
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for i in [@options.ykeys.length-1..0]
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path = @paths[i]
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if path isnt null
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@r.path(path)
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.attr('stroke', @colorFor(row, i, 'line'))
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.attr('stroke-width', @options.lineWidth)
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@seriesPoints = ([] for i in [0...@options.ykeys.length])
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for i in [@options.ykeys.length-1..0]
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for row in @data
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if row._y[i]?
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circle = @r.circle(row._x, row._y[i], @options.pointSize)
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.attr('fill', @colorFor(row, i, 'point'))
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.attr('stroke-width', @strokeWidthForSeries(i))
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.attr('stroke', @strokeForSeries(i))
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else
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circle = null
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@seriesPoints[i].push(circle)
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# create a path for a data series
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#
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# @private
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@createPath: (coords, smooth, bottom) ->
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path = ""
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grads = Morris.Line.gradients(coords) if smooth
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prevCoord = {y: null}
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for coord, i in coords
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if coord.y?
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if prevCoord.y?
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if smooth
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g = grads[i]
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lg = grads[i - 1]
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ix = (coord.x - prevCoord.x) / 4
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x1 = prevCoord.x + ix
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y1 = Math.min(bottom, prevCoord.y + ix * lg)
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x2 = coord.x - ix
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y2 = Math.min(bottom, coord.y - ix * g)
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path += "C#{x1},#{y1},#{x2},#{y2},#{coord.x},#{coord.y}"
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else
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path += "L#{coord.x},#{coord.y}"
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else
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if not smooth or grads[i]?
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path += "M#{coord.x},#{coord.y}"
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prevCoord = coord
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return path
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# calculate a gradient at each point for a series of points
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#
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# @private
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@gradients: (coords) ->
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grad = (a, b) -> (a.y - b.y) / (a.x - b.x)
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for coord, i in coords
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if coord.y?
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nextCoord = coords[i + 1] or {y: null}
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prevCoord = coords[i - 1] or {y: null}
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if prevCoord.y? and nextCoord.y?
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grad(prevCoord, nextCoord)
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else if prevCoord.y?
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grad(prevCoord, coord)
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else if nextCoord.y?
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grad(coord, nextCoord)
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else
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null
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else
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null
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# @private
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hilight: (index) =>
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if @prevHilight isnt null and @prevHilight isnt index
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for i in [0..@seriesPoints.length-1]
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if @seriesPoints[i][@prevHilight]
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@seriesPoints[i][@prevHilight].animate @pointShrink
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if index isnt null and @prevHilight isnt index
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for i in [0..@seriesPoints.length-1]
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if @seriesPoints[i][index]
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@seriesPoints[i][index].animate @pointGrow
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@prevHilight = index
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# @private
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updateHilight: (x) =>
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x -= @el.offset().left
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for hilightIndex in [0...@hilightMargins.length]
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break if @hilightMargins[hilightIndex] > x
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@hilight hilightIndex
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# @private
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strokeWidthForSeries: (index) ->
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@options.pointWidths[index % @options.pointWidths.length]
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# @private
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strokeForSeries: (index) ->
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@options.pointStrokeColors[index % @options.pointStrokeColors.length]
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colorFor: (row, sidx, type) ->
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if typeof @options.lineColors is 'function'
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@options.lineColors.call(@, row, sidx, type)
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else if type is 'point'
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@options.pointFillColors[sidx % @options.pointFillColors.length] || @options.lineColors[sidx % @options.lineColors.length]
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else
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@options.lineColors[sidx % @options.lineColors.length]
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# generate a series of label, timestamp pairs for x-axis labels
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#
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# @private
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Morris.labelSeries = (dmin, dmax, pxwidth, specName, xLabelFormat) ->
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ddensity = 200 * (dmax - dmin) / pxwidth # seconds per `margin` pixels
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d0 = new Date(dmin)
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spec = Morris.LABEL_SPECS[specName]
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# if the spec doesn't exist, search for the closest one in the list
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if spec is undefined
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for name in Morris.AUTO_LABEL_ORDER
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s = Morris.LABEL_SPECS[name]
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if ddensity >= s.span
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spec = s
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break
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# if we run out of options, use second-intervals
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if spec is undefined
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spec = Morris.LABEL_SPECS["second"]
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# check if there's a user-defined formatting function
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if xLabelFormat
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spec = $.extend({}, spec, {fmt: xLabelFormat})
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# calculate labels
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d = spec.start(d0)
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ret = []
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while (t = d.getTime()) <= dmax
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if t >= dmin
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ret.push [spec.fmt(d), t]
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spec.incr(d)
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return ret
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# @private
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minutesSpecHelper = (interval) ->
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span: interval * 60 * 1000
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start: (d) -> new Date(d.getFullYear(), d.getMonth(), d.getDate(), d.getHours())
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fmt: (d) -> "#{Morris.pad2(d.getHours())}:#{Morris.pad2(d.getMinutes())}"
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incr: (d) -> d.setMinutes(d.getMinutes() + interval)
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# @private
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secondsSpecHelper = (interval) ->
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span: interval * 1000
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start: (d) -> new Date(d.getFullYear(), d.getMonth(), d.getDate(), d.getHours(), d.getMinutes())
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fmt: (d) -> "#{Morris.pad2(d.getHours())}:#{Morris.pad2(d.getMinutes())}:#{Morris.pad2(d.getSeconds())}"
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incr: (d) -> d.setSeconds(d.getSeconds() + interval)
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Morris.LABEL_SPECS =
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"decade":
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span: 172800000000 # 10 * 365 * 24 * 60 * 60 * 1000
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start: (d) -> new Date(d.getFullYear() - d.getFullYear() % 10, 0, 1)
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fmt: (d) -> "#{d.getFullYear()}"
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incr: (d) -> d.setFullYear(d.getFullYear() + 10)
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"year":
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span: 17280000000 # 365 * 24 * 60 * 60 * 1000
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start: (d) -> new Date(d.getFullYear(), 0, 1)
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fmt: (d) -> "#{d.getFullYear()}"
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incr: (d) -> d.setFullYear(d.getFullYear() + 1)
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"month":
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span: 2419200000 # 28 * 24 * 60 * 60 * 1000
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start: (d) -> new Date(d.getFullYear(), d.getMonth(), 1)
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fmt: (d) -> "#{d.getFullYear()}-#{Morris.pad2(d.getMonth() + 1)}"
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incr: (d) -> d.setMonth(d.getMonth() + 1)
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"day":
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span: 86400000 # 24 * 60 * 60 * 1000
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start: (d) -> new Date(d.getFullYear(), d.getMonth(), d.getDate())
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fmt: (d) -> "#{d.getFullYear()}-#{Morris.pad2(d.getMonth() + 1)}-#{Morris.pad2(d.getDate())}"
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incr: (d) -> d.setDate(d.getDate() + 1)
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"hour": minutesSpecHelper(60)
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"30min": minutesSpecHelper(30)
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"15min": minutesSpecHelper(15)
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"10min": minutesSpecHelper(10)
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"5min": minutesSpecHelper(5)
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"minute": minutesSpecHelper(1)
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"30sec": secondsSpecHelper(30)
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"15sec": secondsSpecHelper(15)
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"10sec": secondsSpecHelper(10)
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"5sec": secondsSpecHelper(5)
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"second": secondsSpecHelper(1)
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Morris.AUTO_LABEL_ORDER = [
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"decade", "year", "month", "day", "hour",
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"30min", "15min", "10min", "5min", "minute",
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"30sec", "15sec", "10sec", "5sec", "second"
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]
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