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chartjs.coffee
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#`function generateLabels(chart) {
# var data = chart.data;
# if (data.labels.length && data.datasets.length) {
# return data.labels.map(function(label, i) {
# var meta = chart.getDatasetMeta(0);
# var style = meta.controller.getStyle(i);
#
# // fetch the value
# var value = chart.config.data.datasets[arc._datasetIndex].data[arc._index];
#
# return {
# // Add the numbers next to the label
# text: label + ": " + value,
# fillStyle: style.backgroundColor,
# strokeStyle: style.borderColor,
# lineWidth: style.borderWidth,
# hidden: isNaN(data.datasets[0].data[i]) || meta.data[i].hidden,
#
# // Extra data used for toggling the correct item
# index: i
# };
# });
# }
# return [];
#}`
class Dashing.Chartjs extends Dashing.Widget
constructor: ->
super
@id = @get("id")
@type = @get("type")
@header = @get("header")
@labels = @get("labels") && @get("labels").split(",")
@options = @get("options") || {}
if @type == "scatter"
@datasets = @get("datasets")
else
@datasets = @get("datasets") && @get("datasets").split(",")
@colorNames = @get("colornames") && @get("colornames").split(",")
ready: ->
Chart.defaults.global.defaultColor = 'rgb(255, 255, 255)'
Chart.defaults.global.defaultFontColor = 'rgb(255, 255, 255)'
Chart.defaults.global.legend.labels.fontColor = 'rgb(255, 255, 255)'
Chart.defaults.global.layout.padding = { left: 10, right: 10, top: 10, bottom: 10 }
Chart.defaults.global.elements.point.radius = 5
Chart.defaults.global.legend.display = false
Chart.defaults.global.legend.position = 'bottom'
Chart.defaults.doughnut.legend.position = 'right'
Chart.defaults.doughnut.legend.display = true
Chart.defaults.bar.barThickness = 'flex'
#Chart.defaults.bar.legend.display = false
Chart.defaults.bar.backgroundColor = 'rgb(255, 255, 255)'
Chart.defaults.bar.scales.yAxes = [{
ticks: {
beginAtZero: true
}
}]
# Override original legend label generator
# https://github.com/chartjs/Chart.js/blob/master/src/controllers/controller.doughnut.js#L45
# Chart.defaults.global.legend.labels.generateLabels = generateLabels
@draw()
onData: (data) ->
@type = data.type || @type
@header = data.header || @header
@labels = data.labels || @labels
@options = data.options || @options
@datasets = data.datasets || @datasets
@colorNames = data.colorNames || @colorNames
@draw()
draw: ->
switch @type
when "pie", "doughnut", "polarArea"
@circularChart @id,
type: @type,
labels: @labels,
colors: @colorNames,
datasets: @datasets,
options: @options
when "line", "bar", "horizontalBar", "radar", "scatter"
@linearChart @id,
type: @type,
header: @header,
labels: @labels,
colors: @colorNames,
datasets: @datasets,
options: @options
else
return
circularChart: (id, { type, labels, colors, datasets, options }) ->
@ensureChartExists()
@chart.data = @merge labels: labels, datasets: [@merge data: datasets, @colors(colors)]
@chart.update()
linearChart: (id, { type, labels, header, colors, datasets, options }) ->
@ensureChartExists()
@chart.data = @merge labels: labels, datasets: [@merge(@colors(colors), label: header, data: datasets)]
@chart.update()
ensureChartExists: () ->
if typeof @chart == "undefined"
@chart = new Chart(document.getElementById(@id), { type: @type, data: @merge labels: @labels, datasets: [@merge data: @datasets, @colors(@colorNames)] }, @options)
merge: (xs...) =>
if xs?.length > 0
@tap {}, (m) -> m[k] = v for k, v of x for x in xs
tap: (o, fn) -> fn(o); o
# Keep this in sync with application.scss
#$background-color-green: rgba(68, 187, 119, $background-color-transparent-factor);
#$background-color-red: rgba(255, 85, 102, $background-color-transparent-factor);
#$background-color-yellow: rgba(255, 170, 68, $background-color-transparent-factor);
#$background-color-purple: rgba(170, 68, 255, $background-color-transparent-factor);
#$background-color-grey: rgba(153, 153, 153, $background-color-transparent-factor);
colorCode: ->
aqua: "0, 255, 255"
black: "0, 0, 0"
blue: "151, 187, 205"
cyan: "0, 255, 255"
darkgray: "77, 83, 96"
fuschia: "255, 0, 255"
gray: "153, 153, 153"
green: "68, 187, 119"
lightgray: "220, 220, 220"
lime: "0, 255, 0"
magenta: "255, 0, 255"
maroon: "128, 0, 0"
navy: "0, 0, 128"
olive: "128, 128, 0"
purple: "170, 68, 255"
red: "255, 85, 102"
silver: "192, 192, 192"
teal: "0, 128, 128"
white: "255, 255, 255"
yellow: "255, 170, 68"
colors: (colorNames) ->
backgroundColor: colorNames.map (colorName) => @backgroundColor(colorName)
borderColor: colorNames.map (colorName) => @borderColor(colorName)
borderWidth: colorNames.map (colorName) -> 1
pointBackgroundColor: colorNames.map (colorName) => @pointBackgroundColor(colorName)
pointBorderColor: colorNames.map (colorName) => @pointBorderColor(colorName)
pointHoverBackgroundColor: colorNames.map (colorName) => @pointHoverBackgroundColor(colorName)
pointHoverBorderColor: colorNames.map (colorName) => @pointHoverBorderColor(colorName)
backgroundColor: (colorName) -> "rgba(#{ @colorCode()[colorName] }, 0.8)"
borderColor: (colorName) -> "rgba(#{ @colorCode()[colorName] }, 1)"
pointBackgroundColor: (colorName) -> "rgba(#{ @colorCode()[colorName] }, 1)"
pointBorderColor: (colorName) -> "rgba(#{ @colorCode()[colorName] }, 1)"
pointHoverBackgroundColor: -> "fff"
pointHoverBorderColor: (colorName) -> "rgba(#{ @colorCode()[colorName] }, 0.8)"
circleColor: (colorName) ->
backgroundColor: "rgba(#{ @colorCode()[colorName] }, 0.2)"
borderColor: "rgba(#{ @colorCode()[colorName] }, 1)"
borderWidth: 1
hoverBackgroundColor: "#fff"
hoverBorderColor: "rgba(#{ @colorCode()['blue'] },0.8)"