class Morris.Line extends Morris.Grid
# Initialise the graph.
#
constructor: (options) ->
return new Morris.Line(options) unless (@ instanceof Morris.Line)
super(options)
init: ->
# Some instance variables for later
if @options.hideHover isnt 'always'
@hover = new Morris.Hover(parent: @el)
@on('hovermove', @onHoverMove)
@on('hoverout', @onHoverOut)
@on('gridclick', @onGridClick)
# Default configuration
#
defaults:
lineWidth: 3
pointSize: 4
lineColors: [
'#0b62a4'
'#7A92A3'
'#4da74d'
'#afd8f8'
'#edc240'
'#cb4b4b'
'#9440ed'
]
pointStrokeWidths: [1]
pointStrokeColors: ['#ffffff']
pointFillColors: []
smooth: true
xLabels: 'auto'
xLabelFormat: null
xLabelMargin: 24
hideHover: false
# Do any size-related calculations
#
# @private
calc: ->
@calcPoints()
@generatePaths()
# calculate series data point coordinates
#
# @private
calcPoints: ->
for row in @data
row._x = @transX(row.x)
row._y = for y in row.y
if y? then @transY(y) else y
row._ymax = Math.min [@bottom].concat(y for y in row._y when y?)...
# hit test - returns the index of the row at the given x-coordinate
#
hitTest: (x) ->
return null if @data.length == 0
# TODO better search algo
for r, index in @data.slice(1)
break if x < (r._x + @data[index]._x) / 2
index
# click on grid event handler
#
# @private
onGridClick: (x, y) =>
index = @hitTest(x)
@fire 'click', index, @data[index].src, x, y
# hover movement event handler
#
# @private
onHoverMove: (x, y) =>
index = @hitTest(x)
@displayHoverForRow(index)
# hover out event handler
#
# @private
onHoverOut: =>
if @options.hideHover isnt false
@displayHoverForRow(null)
# display a hover popup over the given row
#
# @private
displayHoverForRow: (index) ->
if index?
@hover.update(@hoverContentForRow(index)...)
@hilight(index)
else
@hover.hide()
@hilight()
# hover content for a point
#
# @private
hoverContentForRow: (index) ->
row = @data[index]
content = "<div class='morris-hover-row-label'>#{row.label}</div>"
for y, j in row.y
content += """
<div class='morris-hover-point' style='color: #{@colorFor(row, j, 'label')}'>
#{@options.labels[j]}:
#{@yLabelFormat(y)}
</div>
"""
if typeof @options.hoverCallback is 'function'
content = @options.hoverCallback(index, @options, content, row.src)
[content, row._x, row._ymax]
# generate paths for series lines
#
# @private
generatePaths: ->
@paths = for i in [0...@options.ykeys.length]
smooth = if typeof @options.smooth is "boolean" then @options.smooth else @options.ykeys[i] in @options.smooth
coords = ({x: r._x, y: r._y[i]} for r in @data when r._y[i] isnt undefined)
if coords.length > 1
Morris.Line.createPath coords, smooth, @bottom
else
null
# Draws the line chart.
#
draw: ->
@drawXAxis() if @options.axes in [true, 'both', 'x']
@drawSeries()
if @options.hideHover is false
@displayHoverForRow(@data.length - 1)
# draw the x-axis labels
#
# @private
drawXAxis: ->
# draw x axis labels
ypos = @bottom + @options.padding / 2
prevLabelMargin = null
prevAngleMargin = null
drawLabel = (labelText, xpos) =>
label = @drawXAxisLabel(@transX(xpos), ypos, labelText)
textBox = label.getBBox()
label.transform("r#{-@options.xLabelAngle}")
labelBox = label.getBBox()
label.transform("t0,#{labelBox.height / 2}...")
if @options.xLabelAngle != 0
offset = -0.5 * textBox.width *
Math.cos(@options.xLabelAngle * Math.PI / 180.0)
label.transform("t#{offset},0...")
# try to avoid overlaps
labelBox = label.getBBox()
if (not prevLabelMargin? or
prevLabelMargin >= labelBox.x + labelBox.width or
prevAngleMargin? and prevAngleMargin >= labelBox.x) and
labelBox.x >= 0 and (labelBox.x + labelBox.width) < @el.width()
if @options.xLabelAngle != 0
margin = 1.25 * @options.gridTextSize /
Math.sin(@options.xLabelAngle * Math.PI / 180.0)
prevAngleMargin = labelBox.x - margin
prevLabelMargin = labelBox.x - @options.xLabelMargin
else
label.remove()
if @options.parseTime
if @data.length == 1 and @options.xLabels == 'auto'
# where there's only one value in the series, we can't make a
# sensible guess for an x labelling scheme, so just use the original
# column label
labels = [[@data[0].label, @data[0].x]]
else
labels = Morris.labelSeries(@xmin, @xmax, @width, @options.xLabels, @options.xLabelFormat)
else
labels = ([row.label, row.x] for row in @data)
labels.reverse()
for l in labels
drawLabel(l[0], l[1])
# draw the data series
#
# @private
drawSeries: ->
@seriesPoints = []
for i in [@options.ykeys.length-1..0]
@_drawLineFor i
for i in [@options.ykeys.length-1..0]
@_drawPointFor i
_drawPointFor: (index) ->
@seriesPoints[index] = []
for row in @data
circle = null
if row._y[index]?
circle = @drawLinePoint(row._x, row._y[index], @colorFor(row, index, 'point'), index)
@seriesPoints[index].push(circle)
_drawLineFor: (index) ->
path = @paths[index]
if path isnt null
@drawLinePath path, @colorFor(null, index, 'line'), index
# create a path for a data series
#
# @private
@createPath: (coords, smooth, bottom) ->
path = ""
grads = Morris.Line.gradients(coords) if smooth
prevCoord = {y: null}
for coord, i in coords
if coord.y?
if prevCoord.y?
if smooth
g = grads[i]
lg = grads[i - 1]
ix = (coord.x - prevCoord.x) / 4
x1 = prevCoord.x + ix
y1 = Math.min(bottom, prevCoord.y + ix * lg)
x2 = coord.x - ix
y2 = Math.min(bottom, coord.y - ix * g)
path += "C#{x1},#{y1},#{x2},#{y2},#{coord.x},#{coord.y}"
else
path += "L#{coord.x},#{coord.y}"
else
if not smooth or grads[i]?
path += "M#{coord.x},#{coord.y}"
prevCoord = coord
return path
# calculate a gradient at each point for a series of points
#
# @private
@gradients: (coords) ->
grad = (a, b) -> (a.y - b.y) / (a.x - b.x)
for coord, i in coords
if coord.y?
nextCoord = coords[i + 1] or {y: null}
prevCoord = coords[i - 1] or {y: null}
if prevCoord.y? and nextCoord.y?
grad(prevCoord, nextCoord)
else if prevCoord.y?
grad(prevCoord, coord)
else if nextCoord.y?
grad(coord, nextCoord)
else
null
else
null
# @private
hilight: (index) =>
if @prevHilight isnt null and @prevHilight isnt index
for i in [0..@seriesPoints.length-1]
if @seriesPoints[i][@prevHilight]
@seriesPoints[i][@prevHilight].animate @pointShrinkSeries(i)
if index isnt null and @prevHilight isnt index
for i in [0..@seriesPoints.length-1]
if @seriesPoints[i][index]
@seriesPoints[i][index].animate @pointGrowSeries(i)
@prevHilight = index
colorFor: (row, sidx, type) ->
if typeof @options.lineColors is 'function'
@options.lineColors.call(@, row, sidx, type)
else if type is 'point'
@options.pointFillColors[sidx % @options.pointFillColors.length] || @options.lineColors[sidx % @options.lineColors.length]
else
@options.lineColors[sidx % @options.lineColors.length]
drawXAxisLabel: (xPos, yPos, text) ->
@raphael.text(xPos, yPos, text)
.attr('font-size', @options.gridTextSize)
.attr('font-family', @options.gridTextFamily)
.attr('font-weight', @options.gridTextWeight)
.attr('fill', @options.gridTextColor)
drawLinePath: (path, lineColor, lineIndex) ->
@raphael.path(path)
.attr('stroke', lineColor)
.attr('stroke-width', @lineWidthForSeries(lineIndex))
drawLinePoint: (xPos, yPos, pointColor, lineIndex) ->
@raphael.circle(xPos, yPos, @pointSizeForSeries(lineIndex))
.attr('fill', pointColor)
.attr('stroke-width', @pointStrokeWidthForSeries(lineIndex))
.attr('stroke', @pointStrokeColorForSeries(lineIndex))
# @private
pointStrokeWidthForSeries: (index) ->
@options.pointStrokeWidths[index % @options.pointStrokeWidths.length]
# @private
pointStrokeColorForSeries: (index) ->
@options.pointStrokeColors[index % @options.pointStrokeColors.length]
# @private
lineWidthForSeries: (index) ->
if (@options.lineWidth instanceof Array)
@options.lineWidth[index % @options.lineWidth.length]
else
@options.lineWidth
# @private
pointSizeForSeries: (index) ->
if (@options.pointSize instanceof Array)
@options.pointSize[index % @options.pointSize.length]
else
@options.pointSize
# @private
pointGrowSeries: (index) ->
Raphael.animation r: @pointSizeForSeries(index) + 3, 25, 'linear'
# @private
pointShrinkSeries: (index) ->
Raphael.animation r: @pointSizeForSeries(index), 25, 'linear'
# generate a series of label, timestamp pairs for x-axis labels
#
# @private
Morris.labelSeries = (dmin, dmax, pxwidth, specName, xLabelFormat) ->
ddensity = 200 * (dmax - dmin) / pxwidth # seconds per `margin` pixels
d0 = new Date(dmin)
spec = Morris.LABEL_SPECS[specName]
# if the spec doesn't exist, search for the closest one in the list
if spec is undefined
for name in Morris.AUTO_LABEL_ORDER
s = Morris.LABEL_SPECS[name]
if ddensity >= s.span
spec = s
break
# if we run out of options, use second-intervals
if spec is undefined
spec = Morris.LABEL_SPECS["second"]
# check if there's a user-defined formatting function
if xLabelFormat
spec = $.extend({}, spec, {fmt: xLabelFormat})
# calculate labels
d = spec.start(d0)
ret = []
while (t = d.getTime()) <= dmax
if t >= dmin
ret.push [spec.fmt(d), t]
spec.incr(d)
return ret
# @private
minutesSpecHelper = (interval) ->
span: interval * 60 * 1000
start: (d) -> new Date(d.getFullYear(), d.getMonth(), d.getDate(), d.getHours())
fmt: (d) -> "#{Morris.pad2(d.getHours())}:#{Morris.pad2(d.getMinutes())}"
incr: (d) -> d.setUTCMinutes(d.getUTCMinutes() + interval)
# @private
secondsSpecHelper = (interval) ->
span: interval * 1000
start: (d) -> new Date(d.getFullYear(), d.getMonth(), d.getDate(), d.getHours(), d.getMinutes())
fmt: (d) -> "#{Morris.pad2(d.getHours())}:#{Morris.pad2(d.getMinutes())}:#{Morris.pad2(d.getSeconds())}"
incr: (d) -> d.setUTCSeconds(d.getUTCSeconds() + interval)
Morris.LABEL_SPECS =
"decade":
span: 172800000000 # 10 * 365 * 24 * 60 * 60 * 1000
start: (d) -> new Date(d.getFullYear() - d.getFullYear() % 10, 0, 1)
fmt: (d) -> "#{d.getFullYear()}"
incr: (d) -> d.setFullYear(d.getFullYear() + 10)
"year":
span: 17280000000 # 365 * 24 * 60 * 60 * 1000
start: (d) -> new Date(d.getFullYear(), 0, 1)
fmt: (d) -> "#{d.getFullYear()}"
incr: (d) -> d.setFullYear(d.getFullYear() + 1)
"month":
span: 2419200000 # 28 * 24 * 60 * 60 * 1000
start: (d) -> new Date(d.getFullYear(), d.getMonth(), 1)
fmt: (d) -> "#{d.getFullYear()}-#{Morris.pad2(d.getMonth() + 1)}"
incr: (d) -> d.setMonth(d.getMonth() + 1)
"week":
span: 604800000 # 7 * 24 * 60 * 60 * 1000
start: (d) -> new Date(d.getFullYear(), d.getMonth(), d.getDate())
fmt: (d) -> "#{d.getFullYear()}-#{Morris.pad2(d.getMonth() + 1)}-#{Morris.pad2(d.getDate())}"
incr: (d) -> d.setDate(d.getDate() + 7)
"day":
span: 86400000 # 24 * 60 * 60 * 1000
start: (d) -> new Date(d.getFullYear(), d.getMonth(), d.getDate())
fmt: (d) -> "#{d.getFullYear()}-#{Morris.pad2(d.getMonth() + 1)}-#{Morris.pad2(d.getDate())}"
incr: (d) -> d.setDate(d.getDate() + 1)
"hour": minutesSpecHelper(60)
"30min": minutesSpecHelper(30)
"15min": minutesSpecHelper(15)
"10min": minutesSpecHelper(10)
"5min": minutesSpecHelper(5)
"minute": minutesSpecHelper(1)
"30sec": secondsSpecHelper(30)
"15sec": secondsSpecHelper(15)
"10sec": secondsSpecHelper(10)
"5sec": secondsSpecHelper(5)
"second": secondsSpecHelper(1)
Morris.AUTO_LABEL_ORDER = [
"decade", "year", "month", "week", "day", "hour",
"30min", "15min", "10min", "5min", "minute",
"30sec", "15sec", "10sec", "5sec", "second"
]
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