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DataV:The Carousel Pie Chart widget

Last Updated:May 11, 2023

This topic describes the chart style and configuration panel of a pie chart.

Chart Style

A carousel pie chart is a type of pie chart. Compared with other types of pie charts, a carousel pie chart allows you to display the percentage or value of each type in a carousel. You can customize the percentage or actual value to display the percentage or change of data in a visualized application.

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Settings Panel image..png

  • 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.
  • Size: indicates the size of a widget, including its pixel width and height. You can click the Proportional resizing icon to proportionally adjust the width and height of a widget. After you click this icon again, you can adjust the width and height as needed.
  • Position: the position of a widget, which is indicated by pixel X and Y coordinates. X-coordinate indicates the pixel distance between the upper-left corner of the widget and the left border of the canvas. Y-coordinate indicates the pixel distance between the upper-left corner of the widget and the upper border of the canvas.
  • Rotation Angle: the angle of a rotation that uses the center point of a widget as the rotation point. The unit is degrees (°). You can use one of the following methods to control the rotation angle of a widget:
    • Directly enter the degrees in the Rotation Angle spin box or click the plus sign (+) or minus sign (-) to increase or decrease the value in the Rotation Angle spin box.
    • Drag the black dot in the Rotation control icon icon.
    • Click the Horizontal flip icon to horizontally flip a widget.
    • Click the Vertical flip icon to vertically flip a widget.
  • Opacity: the opacity of a widget. Valid values: 0 and 1. If this parameter is set to 0, the widget is hidden. If this parameter is set to 1, the widget is completely displayed. Default value: 1.

  • Chart Options: the basic attributes of a pie chart. image..png

    Parameter

    Description

    Inner Radius

    The inner radius of the pie chart. The value is a percentage of the widget height. Valid values: 0 to 1.

    Outer Radius

    The outer radius of the pie chart. The value is a percentage of the widget height. Valid values: 0 to 1.

    Animation Duration(ms)

    The amount` of time, in ms, that it takes for the sectors of each category to protrude outward from the pie chart.

    Carousel Interval (ms)

    The amount of time, in ms, for the pie chart of one category to finish, to retract, and to start the fan-out animation of the next category.

    Default Color

    The default color of the pie chart. For more information, see color picker description.

    • Percentage Display Options: the style of the middle percentage portion of the pie chart.

      Parameter

      A

      Text Style

      The text style of the middle percentage part, including the text font, color, and weight.

      Auto-wrap

      If you turn on the switch, when the text in the middle percentage part exceeds its width, the content will wrap automatically. Otherwise, the text will overflow.

      Real Value

      Turn on the switch to display the real value of the data; turn off the switch to display the percentage value of the data automatically calculated by the system.

      Note

      By default, the percentage value is displayed. If you turn on the switch, the actual data value is displayed.

      Percent Symbol

      The unit symbol for the percentage value.

      Percent Symbol Size

      The text size in units of percent values.

      Percent Position

      The position of the unit symbol of the percentage value. Valid values: Prefix and Postfix.

      Percent Offset

      Percent sign and percentage distance.

      Note

      The preceding configurations of the four percent signs are valid only when Show True Values is disabled.

      Decimal Places

      The number of decimal places, percentage and real data are applicable, and the value range is 0 to 10.

      Text Box Size

      The width of the middle percentage. The value is the percentage of the outer radius of the pie chart. Valid values: 0 to 1. If the setting is small, the numbers and symbols will be displayed in two lines. If the setting is too small, the numbers and symbols will be squeezed together.

      Vertical Alignment

      The height of the middle percentage. The value is the percentage of the outer radius of the pie chart. Valid values: 0 to 1.

      Number Font Size

      The size of the numeric text.

      Description Font Size

      The size of the category name text under the number.

  • Legend: the legend style of the chart. You can click the 眼睛图标icon to display or hide the legend.

    • Text Style: the text style of the legend.

      Parameter

      Description

      Font Size

      The size of the legend text.

      Font Color

      The color of the legend text.

      Font Weight

      The font weight of the legend text.

    • Layout: the layout style of the legend.

      • Margin: the spacing style of the legend.

        Parameter

        Description

        Horizontal Interval

        The distance between the left and right sides of adjacent legends. This configuration items is only valid when there are multiple series.

        Vertical Interval

        The distance between the legend and the upper and lower boundaries of the widget.

      • Position: the position of the legend relative to the start coordinates of the widget. You can select Top Center, Top Left, Top Right, Bottom Center, Bottom Left, or Bottom Right.

  • Series: Click the 加号图标or 垃圾桶图标icon to add or remove a custom category. Click the 横排列图标or 竖排列图标icon to configure the arrangement style of multiple categories. Click the 复制图标icon to copy the configuration of the selected category and add a custom category with the same configuration.

    Label

    Background Color: the color of the sector in the pie chart.

Data Panel

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Configuration field description

Parameter

Description

type

Distinguishes different categories and corresponds to the category name in the category.

value

The category value.

Table 1. Parameters
ParameterDescription
Controlled ModeIf 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 RequestAfter 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 SourceIn 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 FilterIf 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 ResultThe response to a data request. If the data source changes, you can click the Refresh icon icon next to Data Response Result to view the data response in real time.

Interaction Panel

This widget does not support interaction events.

Configure interactions in Blueprint Editor

  1. In Canvas Editor, right-click a widget in the Layer panel and select Add to Blueprint Editor.
  2. Click the Blueprint Editor icon icon in the upper-left corner of the page.
  3. In Blueprint Editor, click the Carousel Pie Chart widget in the Added Nodes pane. On the canvas, you can configure parameters for the pie chart, as shown in the following figure. 轮播饼图蓝图参数

    • Event

      Event

      Description

      On Completion of Chart Interface Request

      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.

      On Failure of Chart Interface Request

      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.

    • Action

      Action

      Description

      Request Chart 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 API data source is https://api.test and the data passed to the Request Chart Interface is { id: '1'}, the final request operation is https://api.test?id=1.

      Import Chart Interface

      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.

      Update Widget Configurations

      Style configurations of widgets are dynamically updated. In the Configuration panel, click Copy Configuration to Clipboard to obtain the configuration data of the component. After that, change the style field for the data processing node in Blueprint Editor.

      Show

      The following example shows the widget.

      return{
        "animationType": "",
        "animationDuration": 1000,
        "animationEasing": "linear"
      }

      Hide

      The following example shows how to hide a widget:

      return{
        "animationType": "",
        "animationDuration": 1000,
        "animationEasing": "linear"
      }

      Hide/Show

      The following example shows whether to show or hide a widget.

      return {
        "animationIn": {
          "animationType": "",
          "animationDuration": 1000,
          "animationEasing": "linear"
        },
        "animationOut": {
          "animationType": "",
          "animationDuration": 1000,
          "animationEasing": "linear"
        }
      }

      Move

      Move a widget to a specified location. The following example shows the reference data.

          return{      
            // The positioning type. to indicates absolute positioning, whereas by indicates relative positioning. The default value is to. 
              "positionType": "to",
            // The location, which is indicated by the x and y coordinates. 
            "attr": {
              "x": 0,
              "y": 0
            },
            // The animation type. 
            "animation": {
              "enable": false,
              // The duration in which animation is displayed. 
              "animationDuration": 1000,
              // The animation curve, which can be set to linear|easeInOutQuad|easeInOutExpo. 
              "animationEasing": "linear"
            }
          }