Perspective - Pie Chart

Component Palette Icon:

A Pie Chart displays a list of named items, each of which has a value that is part of a total. The total is the sum of the value of each item. The key to the Pie Chart component is the data property, which contains the items that will be displayed as pie wedges. It is fully customizable in its appearance, from colors, line widths, text styles, and more.

New in 8.1.2

The Pie Chart component had two pre-configured variants:

• Flat Chart - Default component described above.
• Three-Dimensional Chart - Component pre-set with three-dimensional pie wedges.

Properties

Name	Description	Property Type
data	Data source for the chart. Each object within an array defines the name and value for a single pie section.	array
colors	Colors that correspond to each pie section, respective of order in data. Can be chosen from color wheel, chosen from color palette, or entered as RGB or HSL value. See Color Selector.	array
title	Name to display for this chart.	value: string
tileColor	Color of the title. Can be chosen from color wheel, chosen from color palette, or entered as RGB or HSL value. See Color Selector.	color
valueFormat	Label and legend value format configuration. showPercentSymbol: Whether to show the percent symbol next to the percent value. Value is boolean. showValueAsPercent: Whether to show the value as percent. Value is boolean.	array
showLabels	Whether to show labels for each section of this chart. Default is true (show).	value: boolean
labels	Settings for the labels. showName: Whether to show the name on the label. Value is boolean. showValue: Whether to show the value on the label. Hiding values will disable any value formats set. Value is boolean. bent: Bend labels around chart slices. Default is false. Value is boolean. align: Whether the labels should be aligned in vertical columns. Value is boolean. inside: New in 8.1.2 Settings for showing labels inside of the chart slices instead of outside. enabled: Value that determines whether to show the labels inside of the chart slices instead of outside, based on if the value percentage is below the percentLimit threshold. Value is boolean. radius: Distance in percentage towards center of Pie Chart while inside is enabled. 0 represents outside edge while 100 would be directly in the middle. Value is numeric. color: Label color for labels while they are displayed inside the chart. percentLimit: Value that determines at what value percentage to place label on outside of chart instead of inside. Value is numeric. wrap: Label text wrapping configuration. Ability to wrap long labels. enabled: Enables label text wrapping. Default is false. Value is boolean. maxWidth: The maximum allowable label width, in pixels. color: Color of the labels. Can be chosen from color wheel, chosen from color palette, or entered as RGB or HSL value. See Color Selector.	object
tooltipFormat	New in 8.1.5 This value determines the format of the tooltips. Click to see tooltipFormat Placeholder Objects and Formatting Options.	Value is string.
showLegend	Whether to show a legend for this chart. Default is true (show). Value is boolean.
legend	New in 8.1.2 Settings for legend. fontSize: Font size for legend labels. Value is numeric. icon: Settings for the icon on entries in the legend. height: Height value of legend icon. Value is numeric. width: Width value of legend icon. Value is numeric. enabled: Value that determines whether to show the legend icons or hide them. Value is boolean. position: Aligns legend to specified direction. Value is string.	object
legendLabelColor	Color of the legend labels.	color
cutoutRadius	Percent of total radius to cut out of center of chart. If greater than zero, the chart becomes ring-style instead of pie.	value: numeric
selection	New in 8.1.10 An object that contains selection related properties. enabled: Enables selection of pie chart slices. Value is boolean. data: A read-only list of selected pie chart slices.	object
selectOutline	Outline for each section of the pie. width: Width of the border (in pixels) around the pie section. Value is numeric. color: Color of border around each pie section. Can be chosen from color wheel, chosen from color palette, or entered as RGB or HSL value. See Color Selector. opacity: Opacity of border around each pie section. 0 is fully transparent, 1 is fully opaque. Value is numeric.	object
enableTransitions	Whether the chart has visual transition effects for changes in chart data.	value: boolean
threeDimensional	Whether the chart has depth effect to look three-dimensional.	value: boolean
style	Use styles to customize the visual style of the component. Full menu of style options is available for text, background, margin and padding, border, shape and miscellaneous. You can also specify a style class.	object

tooltipFormat Placeholder Objects

The value of this property expects a string, and recognizes certain placeholders objects. The objects are fully detailed in amChart's documentation, and we listed some commonly used objects below. Note that each object should be wrapped in a set of braces ("{" and "}" characters).

Object	Description	Example
Category	References the value of the wedge's category (the string value for the wedge), allowing the tooltip to display a string value for the wedge. The value of category is based off the string value for the wedge. Thus, in the Pie Chart Example on this page, category would return the value of the "flavor" property.	{category}
Value	Returns the value of the wedge. In addition to just the value of the wedge, additional modifiers can be added to obtain pre-calculated derivative values, such as the sum or largest value. A full list of modifiers can be found in the amCharts documentation.	{value} {value.sum} {value.high}

tooltipFormat Formatting Options

In addition to placeholder objects, the tooltip can also be formatted in the following ways. All formatting is placed between a set of brackets ( "[" and "]" characters) as a single block. One or more formatting options can be place into a single block. When specifying multiple options, each should be delimited by a single space. Example: [bold red]

Option	Description	Example Format	Example Output
Bold	Applies bold formatting to the characters in the block.	Hello [bold]World	Hello World
Colors	Allows you to specify the color of the text. Colors can be specified as RGB color codes, or named colors.	Hello [red]World OR Hello [#ff0000]World	Hello World
In-line CSS	Allows you to directly apply CSS attributes.	Hello [font-style: italic]World	Hello World
Closing Bracket [/]	Terminates the formatting string. Note that this is optional. Style formatting will automatically be terminated by either the next opening style block ( "[" character) or the end of the string, whichever comes first.	[bold]Hello [/]World!	Hello World!
Formatting Functions	In addition to the above, several functions are available to further format the placeholder objects. A full list of functions can be found in the amChart documentation.	{value.formatNumber('###.00')}	100.00

Component Events

The Perspective Event Types Reference page describes all the possible component event types for Perspective components. Not all component events support each Perspective component. The Component Events and Actions page shows how to configure events and actions on a Perspective component. Component scripting is handled separately and can be accessed from the Component menubar or by right clicking on the component.

Example

The Pie Chart component can be used for things like inventory tracking. Below is an example that uses a Pie Chart to display the inventory of a local ice cream shop.

1. From the Perspective section of the Project Browser in your Designer, right-click on the Views folder and select New View... to create a new view.

2. This will bring up the New View window. Give your view a name and select the Coordinate Root Container type. The Page URL setting will remain unchecked for this example.

   

3. Drag and drop a Pie Chart from the Perspective Component Palette onto your newly created view.

4. Set the Pie Chart's title property to Ice Cream Inventory.

5. Copy the array below and paste it on the Pie Chart's data property.

   [
     {
       "flavor": "Vanilla",
       "count": "50"
     },
     {
       "flavor": "Chocolate",
       "count": "15"
     },
     {
       "flavor": "Strawberry",
       "count": "68"
     },
     {
       "flavor": "Cookies and Cream",
       "count": "19"
     },
     {
       "flavor": "Mint Chocolate Chip",
       "count": "9"
     },
     {
       "flavor": "Chocolate Chip",
       "count": "53"
     },
     {
       "flavor": "Pistachio",
       "count": "48"
     }
   ]
   note

   The array above is a an array of objects. Each object is a dictionary containing key/value pairs where the keys of each dictionary represent ice cream flavors and ice cream inventory counts with their respective values for each. Value types can vary as you can pass both "50" and 50 as counts and the Pie Chart will still be able to render the data correctly. The Pie Chart can have various forms of data sources. The data source array can be built via scripting following the above format or it can be built using a query binding on the Pie Chart's data property. The query used must return two columns in any order where each column represents a string and a numeric value to be rendered by the chart.

6. Once you have done this, your Pie Chart should accurately represent of the inventory data for the ice cream shop.