class Morris.Bar extends Morris.Grid
constructor: (options) ->
return new Morris.Bar(options) unless (@ instanceof Morris.Bar)
super($.extend {}, options, parseTime: false)
init: ->
@cumulative = @options.stacked
if @options.hideHover isnt 'always'
@hover = new Morris.Hover(parent: @el)
@on('hovermove', @onHoverMove)
@on('hoverout', @onHoverOut)
@on('gridclick', @onGridClick)
# Default configuration
#
defaults:
barSizeRatio: 0.75
barGap: 3
barColors: [
'#0b62a4'
'#7a92a3'
'#4da74d'
'#afd8f8'
'#edc240'
'#cb4b4b'
'#9440ed'
],
barOpacity: 1.0
barRadius: [0, 0, 0, 0]
xLabelMargin: 50
# Do any size-related calculations
#
# @private
calc: ->
@calcBars()
if @options.hideHover is false
@hover.update(@hoverContentForRow(@data.length - 1)...)
# calculate series data bars coordinates and sizes
#
# @private
calcBars: ->
for row, idx in @data
row._x = @left + @width * (idx + 0.5) / @data.length
row._y = for y in row.y
if y? then @transY(y) else null
# Draws the bar chart.
#
draw: ->
@drawXAxis() if @options.axes in [true, 'both', 'x']
@drawSeries()
# draw the x-axis labels
#
# @private
drawXAxis: ->
# draw x axis labels
ypos = @bottom + (@options.xAxisLabelTopPadding || @options.padding / 2)
prevLabelMargin = null
prevAngleMargin = null
for i in [0...@data.length]
row = @data[@data.length - 1 - i]
label = @drawXAxisLabel(row._x, ypos, row.label)
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
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()
# draw the data series
#
# @private
drawSeries: ->
groupWidth = @width / @options.data.length
numBars = if @options.stacked then 1 else @options.ykeys.length
barWidth = (groupWidth * @options.barSizeRatio - @options.barGap * (numBars - 1)) / numBars
barWidth = Math.min(barWidth, @options.barSize) if @options.barSize
spaceLeft = groupWidth - barWidth * numBars - @options.barGap * (numBars - 1)
leftPadding = spaceLeft / 2
zeroPos = if @ymin <= 0 and @ymax >= 0 then @transY(0) else null
@bars = for row, idx in @data
lastTop = 0
for ypos, sidx in row._y
if ypos != null
if zeroPos
top = Math.min(ypos, zeroPos)
bottom = Math.max(ypos, zeroPos)
else
top = ypos
bottom = @bottom
left = @left + idx * groupWidth + leftPadding
left += sidx * (barWidth + @options.barGap) unless @options.stacked
size = bottom - top
if @options.verticalGridCondition and @options.verticalGridCondition(row.x)
@drawBar(@left + idx * groupWidth, @top, groupWidth, Math.abs(@top - @bottom), @options.verticalGridColor, @options.verticalGridOpacity, @options.barRadius)
top -= lastTop if @options.stacked
@drawBar(left, top, barWidth, size, @colorFor(row, sidx, 'bar'),
@options.barOpacity, @options.barRadius)
lastTop += size
else
null
# @private
#
# @param row [Object] row data
# @param sidx [Number] series index
# @param type [String] "bar", "hover" or "label"
colorFor: (row, sidx, type) ->
if typeof @options.barColors is 'function'
r = { x: row.x, y: row.y[sidx], label: row.label }
s = { index: sidx, key: @options.ykeys[sidx], label: @options.labels[sidx] }
@options.barColors.call(@, r, s, type)
else
@options.barColors[sidx % @options.barColors.length]
# hit test - returns the index of the row at the given x-coordinate
#
hitTest: (x) ->
return null if @data.length == 0
x = Math.max(Math.min(x, @right), @left)
Math.min(@data.length - 1,
Math.floor((x - @left) / (@width / @data.length)))
# 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)
@hover.update(@hoverContentForRow(index)...)
# hover out event handler
#
# @private
onHoverOut: =>
if @options.hideHover isnt false
@hover.hide()
# 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)
x = @left + (index + 0.5) * @width / @data.length
[content, x]
drawXAxisLabel: (xPos, yPos, text) ->
label = @raphael.text(xPos, yPos, text)
.attr('font-size', @options.gridTextSize)
.attr('font-family', @options.gridTextFamily)
.attr('font-weight', @options.gridTextWeight)
.attr('fill', @options.gridTextColor)
drawBar: (xPos, yPos, width, height, barColor, opacity, radiusArray) ->
maxRadius = Math.max(radiusArray...)
if maxRadius == 0 or maxRadius > height
path = @raphael.rect(xPos, yPos, width, height)
else
path = @raphael.path @roundedRect(xPos, yPos, width, height, radiusArray)
path
.attr('fill', barColor)
.attr('fill-opacity', opacity)
.attr('stroke', 'none')
roundedRect: (x, y, w, h, r = [0,0,0,0]) ->
[ "M", x, r[0] + y, "Q", x, y, x + r[0], y,
"L", x + w - r[1], y, "Q", x + w, y, x + w, y + r[1],
"L", x + w, y + h - r[2], "Q", x + w, y + h, x + w - r[2], y + h,
"L", x + r[3], y + h, "Q", x, y + h, x, y + h - r[3], "Z" ]
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