DataV:Donut Layer

Settings Panel

• Search for Configurations: In the right-side panel of Canvas Editor, click the Settings tab, and click Search for Configurations in the upper-right corner. Enter the required configuration item in the search box, and click the search icon to quickly locate the configuration item. Fuzzy match is supported. For more information, see Search for asset configurations.

• Minimum Radius: the inner radius of the doughnut layer.

• Maximum Radius: the value of the outer radius of the doughnut layer.

• Donut Size: The size of the donut layer.

• Outer Ring Color: the color of the outer ring of the donut layer.

• Inner Render Mode: the color rendering mode of the inner circle of the donut layer, including Monochrome and Gradient.

• Start Color and End Color: the start color and end color of the doughnut. This configuration items is displayed only when you select Gradient for Inner Render Mode.

• Inner Color: the color of the inner circle of the doughnut layer. This configuration items is displayed only when Inner Render Mode is set to Monochrome.

• dialog box Configuration: The style of the dialog box that appears when you move over or click a donut on a preview or publish page.

  Parameter	Description
  Background Color	The background color of the dialog box.
  Font	The font style of the text in the dialog box.
  The color of the font.	dialog box the color of the font.
  Size	dialog box the size of the font.

• Series: Click the or icon to add or delete a scatter series. Click the or icon to configure the arrangement style of multiple scatter series. Click the icon to copy the selected series configurations and add a series with the same configurations.

  Parameter	Description
  Key Name	The field name of the scatter class, which matches the corresponding series field in the donut field in the data panel.
  Color	The color of this scatter class.

Data Panel

Configuration field description

Table 1. Parameters

Parameter	Description
Controlled Mode	If you turn on the switch, data is not requested when a widget is initialized. Data requests are triggered only based on callback IDs or the method configured in Blueprint Editor. If you turn off the switch, data requests are automatically triggered. By default, the switch is turned off.
Auto Data Request	After you select the Auto Data Request check box, you can enable dynamic polling, and manually specify the polling interval. If you do not select this check box, data is not automatically requested. You must manually refresh the page to request data or use Blueprint Editor or callback ID events to trigger data requests.
Data Source	In the right-side panel of Canvas Editor, click the Data tab. Click Set next to Static Data. In the Configure Datasource panel, select a data source from the Data Source Type drop-down list. Enter code for data query in the code editor, click Preview Data Response to preview the response of the data source, and then view the response. For more information, see Configure asset data.
Data Filter	If you select the Data Filter check box, you can convert the data structure, filter data, and perform simple calculations. If you click the plus sign (+) next to Add Filter, you can configure the script for the data filter in the editor that appears. For more information, see Use the data filter.
Data Response Result	The response to a data request. If the data source changes, you can click the icon next to Data Response Result to view the data response in real time.

Interaction Panel

Select the Enable check box to enable interactions between widgets. When a donut is clicked, a data request is triggered, a callback value is thrown, and the data of different donuts is dynamically loaded. By default, the lng and lat values in the data are returned. For more information, see How do I configure the callback ID of a card flip widget.

Configure interactions in Blueprint Editor

1. In Canvas Editor, click the icon next to Donut Layer in the 3D Earth widget.

2. Click the icon in the upper-left corner.

3. In Blueprint Editor, click the Donut Layer component in the Import Nodes pane. You can view the configuration parameters of the donut layer on the canvas, as shown in the following figure.

   • Event

     Event	Description
     When the data interface request is completed	The event is triggered with the processed JSON data after a data interface request is responded and processed by a filter. For more information about specific data examples, see the Data Response Result section of the Data tab in the right-side configuration panel of the canvas editor.
     When a data interface request fails	The event that is returned when a data interface request fails (the request may be due to network problems or interface errors) and is processed by the filter. The event also throws the processed JSON data. For more information about specific data examples, see the Data Response Result section of the Data tab in the right-side configuration panel of the canvas editor.
     Donut is triggered by clicking	An event that fires when a donut is clicked, while throwing the corresponding data item for that donut.

   • Policy Action

     Policy Action	Description
     Request Data Interface	This action is performed to request the server data again. The data sent by an upstream data processing node or layer node is used as a parameter. For example, if the doughnut layer configures the API data source as https://api.test and the data passed to the request data interface as { id: '1'}, the final request interface is https://api.test?id=1.
     Import data	After data of a widget is processed in accordance with its drawing format, the widget is imported for redrawing. You do not need to request server data again. For more information about specific data examples, see the Data Response Result section of the Data tab in the right-side configuration panel of the canvas editor.
     Display Widget	A widget is shown without the need to specify parameters.
     Hide components	A widget is hidden without the need to specify parameters.