406 lines
12 KiB
CoffeeScript
406 lines
12 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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if @options.hideHover isnt 'always'
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@hover = new Morris.Hover(parent: @el)
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@on('hovermove', @onHoverMove)
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@on('hoverout', @onHoverOut)
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@on('gridclick', @onGridClick)
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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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pointStrokeWidths: [1]
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pointStrokeColors: ['#ffffff']
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pointFillColors: []
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smooth: true
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xLabels: 'auto'
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xLabelFormat: null
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xLabelMargin: 24
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hideHover: false
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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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# 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 [@bottom].concat(y for y in row._y when y?)...
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# hit test - returns the index of the row at the given x-coordinate
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#
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hitTest: (x) ->
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return null if @data.length == 0
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# TODO better search algo
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for r, index in @data.slice(1)
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break if x < (r._x + @data[index]._x) / 2
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index
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# click on grid event handler
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#
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# @private
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onGridClick: (x, y) =>
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index = @hitTest(x)
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@fire 'click', index, @data[index].src, x, y
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# hover movement event handler
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#
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# @private
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onHoverMove: (x, y) =>
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index = @hitTest(x)
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@displayHoverForRow(index)
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# hover out event handler
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#
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# @private
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onHoverOut: =>
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if @options.hideHover isnt false
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@displayHoverForRow(null)
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# display a hover popup over the given row
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#
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# @private
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displayHoverForRow: (index) ->
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if index?
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@hover.update(@hoverContentForRow(index)...)
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@hilight(index)
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else
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@hover.hide()
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@hilight()
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# hover content for a point
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#
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# @private
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hoverContentForRow: (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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if typeof @options.hoverCallback is 'function'
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content = @options.hoverCallback(index, @options, content, row.src)
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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 = if typeof @options.smooth is "boolean" then @options.smooth else @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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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() if @options.axes in [true, 'both', 'x']
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@drawSeries()
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if @options.hideHover is false
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@displayHoverForRow(@data.length - 1)
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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.padding / 2
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prevLabelMargin = null
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prevAngleMargin = null
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drawLabel = (labelText, xpos) =>
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label = @drawXAxisLabel(@transX(xpos), ypos, labelText)
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textBox = label.getBBox()
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label.transform("r#{-@options.xLabelAngle}")
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labelBox = label.getBBox()
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label.transform("t0,#{labelBox.height / 2}...")
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if @options.xLabelAngle != 0
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offset = -0.5 * textBox.width *
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Math.cos(@options.xLabelAngle * Math.PI / 180.0)
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label.transform("t#{offset},0...")
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# try to avoid overlaps
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labelBox = label.getBBox()
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if (not prevLabelMargin? or
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prevLabelMargin >= labelBox.x + labelBox.width or
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prevAngleMargin? and prevAngleMargin >= labelBox.x) and
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labelBox.x >= 0 and (labelBox.x + labelBox.width) < @el.width()
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if @options.xLabelAngle != 0
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margin = 1.25 * @options.gridTextSize /
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Math.sin(@options.xLabelAngle * Math.PI / 180.0)
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prevAngleMargin = labelBox.x - margin
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prevLabelMargin = labelBox.x - @options.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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@seriesPoints = []
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for i in [@options.ykeys.length-1..0]
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@_drawLineFor i
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for i in [@options.ykeys.length-1..0]
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@_drawPointFor i
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_drawPointFor: (index) ->
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@seriesPoints[index] = []
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for row in @data
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circle = null
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if row._y[index]?
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circle = @drawLinePoint(row._x, row._y[index], @colorFor(row, index, 'point'), index)
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@seriesPoints[index].push(circle)
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_drawLineFor: (index) ->
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path = @paths[index]
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if path isnt null
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@drawLinePath path, @colorFor(null, index, 'line'), index
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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 @pointShrinkSeries(i)
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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 @pointGrowSeries(i)
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@prevHilight = index
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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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drawXAxisLabel: (xPos, yPos, text) ->
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@raphael.text(xPos, yPos, text)
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.attr('font-size', @options.gridTextSize)
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.attr('font-family', @options.gridTextFamily)
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.attr('font-weight', @options.gridTextWeight)
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.attr('fill', @options.gridTextColor)
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drawLinePath: (path, lineColor, lineIndex) ->
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@raphael.path(path)
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.attr('stroke', lineColor)
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.attr('stroke-width', @lineWidthForSeries(lineIndex))
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drawLinePoint: (xPos, yPos, pointColor, lineIndex) ->
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@raphael.circle(xPos, yPos, @pointSizeForSeries(lineIndex))
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.attr('fill', pointColor)
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.attr('stroke-width', @pointStrokeWidthForSeries(lineIndex))
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.attr('stroke', @pointStrokeColorForSeries(lineIndex))
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# @private
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pointStrokeWidthForSeries: (index) ->
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@options.pointStrokeWidths[index % @options.pointStrokeWidths.length]
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# @private
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pointStrokeColorForSeries: (index) ->
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@options.pointStrokeColors[index % @options.pointStrokeColors.length]
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# @private
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lineWidthForSeries: (index) ->
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if (@options.lineWidth instanceof Array)
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@options.lineWidth[index % @options.lineWidth.length]
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else
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@options.lineWidth
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# @private
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pointSizeForSeries: (index) ->
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if (@options.pointSize instanceof Array)
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@options.pointSize[index % @options.pointSize.length]
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else
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@options.pointSize
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# @private
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pointGrowSeries: (index) ->
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Raphael.animation r: @pointSizeForSeries(index) + 3, 25, 'linear'
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# @private
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pointShrinkSeries: (index) ->
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Raphael.animation r: @pointSizeForSeries(index), 25, 'linear'
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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.setUTCMinutes(d.getUTCMinutes() + 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.setUTCSeconds(d.getUTCSeconds() + 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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"week":
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span: 604800000 # 7 * 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() + 7)
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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", "week", "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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