ember-data-visualizations

Ember addon to support visualizations with dc.js (d3 & crossfiltering)

Installation

ember install ember-data-visualizations

All charts must have a group and a dimension. All charts use d3-tip (an npm package which can be found here) to create and style tooltips. See the dummy app for an example of each type of chart. The code for the dummy can be found in tests/dummy. In particular, tests/dummy/controllers/application.js and tests/dummy/templates/application.hbs will be useful in understanding the use of this addon.

Optional parameters

height (number): height in pixels of the chart
colors (Array): Hex strings to color the chart
showLegend (boolean): Whether or not to show an interactive legend. Heatmaps do not have this option, however, as a heatmap doesn't make sense without a legend.
legendWidth (number): width in pixels of the legend. Not applicable if showLegend is false. If not specified, defaults to 250.
isChartAvailable (boolean, defaults to true): if true, shows normal view. If false, shows chart-not-available view.
chartNotAvailableMessage (String): message to display on top of chart if isChartAvailable is false
chartNotAvailableTextColor (String): Hexadecimal color value to color the text of chartNotAvailableMessage
chartNotAvailableColor: (String): Hexadecimal color value to color the chart if isChartAvailable is false

All optional boolean parameters except isChartAvailable default to false.

Column chart

The column chart uses an array of crossfilter groups to display different types of column charts (vertical bar charts). If there is only one group, you must still pass an array of 1 group to the column chart. This is true for many of the charts in this addon.

Required parameters

dimension: crossfilter dimension to use for chart
group: array of crossfilter groups to use for chart
xAxis (Object): domain (Array, probably of moment objects) and ticks (number of ticks to show)

Optional parameters

yAxis (Object): domain (Array, probably of numbers) (optional): autofits bars, ticks (number of ticks to show), and formatter (function to apply to every y-axis value for tick display), bottomLabelPosition (boolean): whether to display labels on the top, or on the bottom of x-axis.
type (String) (defaults to GROUPED):
- GROUPED is for "ordinary" data and is most likely what should be used if there is only one crossfilter group.
- LAYERED is for "overlapping data: e.g. there are 10 fruits, 6 of which are citrus, 3 of which are oranges. If this chart is LAYERED, the series option tells the chart how to format the bars (hatching).
- STACKED creates a stacked bar chart: e.g. there are 10 fruits, 20 vegetables, and 15 meats and we want to display them on top of each other.
series (Array): Each object in the array has properties:
- title: the name of this.get('group') at the same index (used in tooltip creation)
- hatch: pos (for a hatch from bottom left to top right), neg (for a hatch from top left to bottom right), or false (for no hatch)
labelOptions(Object): display options for labels on top of bars/columns.
- showMaxMin (boolean): whether or not to show max/min indicators for the maximum and minimum values of one of the groups on the column chart.
- showDataValues (boolean): whether or not to display the y-value of each point above each bar.
- labelCollisionResolution (string) ['auto' | 'default']: runs collision detection algorithm to determine if a label is too wide, and skips next labels accordingly.
seriesMaxMin (index): index of this.get('group') to use to determine the maximum and minimum values (only used if showMaxMin is true)
width (number): width in pixels of chart. If not specified, the chart will fill to the width of its container.
showComparisonLines (boolean): whether or not to show the comparison lines
comparisonLines (Array of Objects): horizontal lines to mark a target, average, or any kind of comparison value. Properties:
- value (number): value on y axis on which to show line
- color (Hex string): color of the comparison line
- alert (String; acceptable values: above, below, ''): whether to change the color of rectangles above or below this line. Use an empty string for no color changing.
- alertColorIndex (number): index of the colors array to use for color changes for this line.
showCurrentIndicator (boolean): whether or not to show diamond-shaped 'current' indicator on x axis
currentInterval (Object): MUST have a start property which contains a moment object that tells the chart where to display the current indicator.

Line chart

The line chart uses an array of crossfilter groups to display different types of line charts. If there is only one group, you must still pass an array of 1 group to the line chart. This is true for many of the charts in this addon.

Required parameters

dimension: crossfilter dimension to use for chart
group: array of crossfilter groups to use for chart
xAxis (Object): domain (Array, probably of moment objects) and ticks (number of ticks to show)

Optional parameters

yAxis (Object): domain (Array, probably of numbers) (optional) and ticks (number of ticks to show)
series (Array): Each object in the array has a title property. title is the name of this.get('group') at the same index (used in tooltip creation).
width (number): width in pixels of chart. If not specified, the chart will fill to the width of its container.
showCurrentIndicator (boolean): whether or not to show diamond-shaped 'current' indicator on x axis
currentInterval (Object): MUST have a start property which contains a moment object that tells the chart where to display the current indicator.
showComparisonLines (boolean): whether or not to show the comparison lines
comparisonLines (Array of Objects): horizontal lines to mark a target, average, or any kind of comparison value. Properties:
- value (number): value on y axis on which to show line
- color (Hex string): color of the comparison line
showMaxMin (boolean): whether or not to show max/min indicators for the maximum and minimum values of one of the groups on the line chart
seriesMaxMin (index): index of this.get('group') to use to determine the maximum and minimum values (only used if showMaxMin is true)

Row chart

The row chart uses an array of crossfilter groups to display different types of row charts (horizontal bar charts). If there is only one group, you must still pass an array of 1 group to the row chart. This is true for many of the charts in this addon.

Required parameters

dimension: crossfilter dimension to use for chart
group: array of crossfilter groups to use for chart
- Currently, the row chart only supports using one group, so the group parameter will be an array of length 1. However, it is kept as an array for potential future use on stacked, grouped, or layered charts.

Optional parameters

colors note: colors[2] is currently the color that the bars appear as
labelWidth (number): width in pixels of the labels div; defaults to 150
xAxis (Object): ticks property tells the chart how many ticks to display on the x axis.
width (number): width in pixels of chart. If not specified, the chart will fill to the width of its container.
hideXAxisLines (boolean): whether to hide the x-axis grid lines that show by default on the chart
showYGridLines (boolean): whether to show y-axis grid lines on the chart
showYTicks (boolean): whether to show tick marks for each bar on the y axis
showMaxMin: whether to show max/min indicators for the maximum and minimum values of the row chart
showComparisonLine (boolean): whether to show a comparison line
comparisonLine (Object): a vertical line to mark a target, average, or any kind of comparison value. Properties:
- value (value on y axis on which to show line)
- displayValue (text that will appear to the left of the line on the y axis)
- color (Hex string)
chartNotAvailableBars (number): number of bars to show on the chart not available view

Pie chart

The pie chart does not use an array of crossfilter groups. It uses a singular group.

Required parameters

dimension: crossfilter dimension to use for chart
group: crossfilter group to use for chart (not an array)

Optional parameters

colorMap (Object): parameter/key pairs by which to color chart
- e.g. if key values of the data are 'apples, bananas, blueberries', colorMap might be {'apples': '#8b0000', 'bananas': '#ffff00', 'blueberries': '#6495ed'}, where those colors exist in the colors array.
height note: radius of the chart is height / 2
donutChart (boolean): whether or not this pie chart is a donut chart (has an inner radius)
showTotal (boolean): whether or not to show the total number in the center of the chart. Not recommended unless donutChart is true
labels (boolean): whether or not to show labels on the pie slices with the key value of the slice
labelsWithValues (boolean): whether or not to show values and labels both on the pie slices with the key value of the slice
externalLabels (boolean): whether or not the labels appear on the outside of the chart. Only if labels is true
legend (boolean): whether or not to show a legend for the pie chart
labelCollisionResolution (string) [auto | default] : whether or not run collision detection algorithm to render labels outside of pie slices if they overlap.
formatter (function) : formats label values, total text and tooltips according to the function passed.

Bubble chart

The bubble chart does not use an array of crossfilter groups. It uses a singluar group. The bubble chart is a dc-addons bubbleCloud, which is not as robustly supported as the rest of our chart types. Therefore, crossfiltering on this chart will likely not be possible until the source is updated. See this issue.

Required parameters

dimension: crossfilter dimension to use for chart
group: crossfilter group to use for chart (not an array)
- The key of each fact is a string that identifies the fact. It is also used as the title of the bubble, subject to the titleFormatter function (see optional parameters)
- The value of each fact is an object with the following properties:
  - tooltip (String): tooltips display the key property with a subtitle of whatever is contained in this property. Optional.
  - colorValue (number): index of the colors array that this bubble is colored. e.g. if the colors array is ['#8b0000', '#ffff00', '#6495ed'], a banana object might have a colorValue of 1. See the dummy app for an example of color mapping. Optional.
  - radius (String): Not necessarily a number value. This is the string value that will be transformed into a number based on radiusFormat.
    - e.g. if radiusFormat = 'timestamp', radius should be a timestamp like '2018-06-26T16:55:25-04:00'. Required.
  - subtitle (String): Actual subtitle of bubble. Optional.

Optional parameters

Formats/formatters (if not specified, the labels on the bubbles will assume the key and value.subtitle property verbatim, and radiusFormat will assume 'count'):
- radiusFormat (string): specifies how to interpret the value.radius string to get an actual radius number. Options: timestamp, milliseconds, count.
  - The timestamp option calculates the duration between value.radius and now.
  - The milliseconds option assumes that value.radius is a duration in milliseconds.
  - The count option assumes that whatever is currently in value.radius is the actual physical radius desired.
- titleFormatter (function): Takes an input of the fact's key property and outputs the formatted string for the bubble label.
  - e.g. if the key is 'First Last' and the label on the bubble should be the initials, titleFormatter takes an input of First Last and returns FL.
- subtitleFormatter (function): Takes an input of the fact's value.subtitle property and outputs the formatted string for the bubble subtitle.
  - e.g. if the subtitle is a timestamp, subtitleFormatter takes an input of a timestamp and returns a formatted duration.
width (number): width in pixels of the chart. It is recommended that the chart be roughly square for best display of the bubbles. If not specified, the chart will fill to the width of its container.

Heat map

The heatmap does not use an array of crossfilter groups. It uses a singular group.

Required parameters

dimension: crossfilter dimension to use for chart
colors (Array): list of colors to use.
group: crossfilter group to use for chart (not an array)
- The key of each fact is an array that tells the heatmap the position of the fact on the chart. key[0] will tell the chart the y position, and key[1] the x position.
- The value property of each fact will be used to determine the color of the fact.
colorMap (function): a function that takes value as parameter and returns index of an element from colors list.
xAxis (Object) describes the x axis. Properties:
- domain (Array): describes the domain of the x axis. This property is REQUIRED.
- ticks (number): number of tick LABELS to show on the x axis. This property is optional, and if left out, the chart will automatically show as many labels as will comfortably fit based on the chart's width.
- tickMarks (number): number of ticks to show on the x axis. This property is optional, and if left out, the chart will show a tick for each data point.
- label (String): a label for the x axis. This property is optional.
keyFormat (function): function to apply to key[1] in order to attain the desired format on the screen. For example, if key[1] of each fact on your group is a date formatted like 20161109, keyFormat might be key => moment(key.toString()).format('MMM DD').

Optional parameters

yAxis (Object): label property shows a label on the y axis (optional).
width (number): width in pixels of chart. If not specified, the chart will fill to the width of its container.
showCurrentIndicator (boolean): whether or not to show diamond-shaped 'current' indicator on x axis
currentInterval (Object): MUST have a start property which contains a moment object that tells the chart where to display the current indicator.
legend (boolean): whether or not to show an interactive legend to the right of the heatmap. If true, legendWidth must also be specified for the legend to appear.
legendWidth (number): width in pixels that legend should take up on the right side of the chart. This width is subtracted from the chart's overall width when drawing the chart, so it cannot be larger than the width parameter.
minBoxWidth (number): minimum width in pixels for each box in the heatmap. If not specified, defaults to 4.