DataV:The Basic Pie Chart II

Chart Style

A basic pie chart is a type of pie chart. It allows you to use polar coordinates to determine the size of a chart, display labels on the outside of a chart, switch between real values and percentage values, customize graphic styles, and configure multi-series data. It can clearly and intelligently display the proportions of each category.

Configuration Panel

• Search Configuration: Click Search Configuration in the upper-right corner of the Configuration panel. In the Search Configuration panel, enter the name of the configuration items that you want to search for to quickly locate the configuration items. 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 icon to lock the aspect ratio of the widget and modify the width and height of the widget in equal proportion. Click again to unlock. The aspect ratio is not limited after unlocking.

• 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 icon to control the rotation angle of the widget.

  • Click the icon to flip the widget style.

  • Click the icon to flip the widget style.

• Opacity: Valid values: 0 to 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

  • Custom Margins: Click the icon to specify the custom margins. The distance between the pie chart area and the four boundaries of the widget. Default unit: px.

  • Pie Chart Style: the style of the pie chart.

    Parameter	description
    Stroke Color	The stroke color of the pie chart.
    Stroke weight	The stroke weight value of the pie chart.

  • Value Label: the style of the value label in the pie chart. You can click the icon to control whether the value label appears or not.

    Parameter	description
    Location	The display position of the label text. Valid values: Inside, Outside, and Spider.
    Text Style	The font style, text weight, font size, and color of the value label text.

  • Legend: the legend style of a basic pie chart. You can click the icon to display the legend.

    Parameter	description
    Allow Page Turning	If the switch is turned on, page turning can be allowed when the number of legends is too large to be arranged. If the switch is turned off, page turning cannot be allowed.
    Layout	The position of the legend in relation to the start coordinates of the widget. You can select Top Left, Top Center, Top Right, Bottom Left, Bottom Center, or Bottom Right.
    Legend Tags	The style of the legend tag, including the shape style and size of the legend.
    Legend Text	The style of the legend text, including the font style, text weight, font size, and color of the legend.

• Axis: the radial axis style of the pie chart.

  Radius: the radius of the pie chart.

• Series

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

    Parameter	description
    Mapping Field	name Field Value: the value of the data series field. You can customize the value. If you do not specify this parameter, the system displays name field values in the widget data as series field values. If this parameter is not empty, you must ensure the order in which data is returned. Display Name: the display name of the data series, which can be customized.
    Color	The color of the pie chart in this series.

  • Mapping Type: If you turn on the switch, this parameter takes effect only when the data contains series name values. You can use the Mapping Field parameter to set the color of a specific series. If you turn off the switch, this parameter takes effect only when the Mapping Field configuration items is disabled.

• Other

  dialog box: The style of the dialog box that appears when you move the pointer over or click a fan on the preview or publish page. Click the icon to turn the dialog box on or off.

  Parameter	description
  Text Style	The style of the text in the dialog box, including the font style, weight, font size, and color.
  Background Box Style	The background box style of the dialog box. Background Color: the background color of the dialog box. Pin: the inner margin of the dialog box. Unit: pixels. Border Border: the border thickness of the dialog box. Unit: pixels. Border Color: The border color of the dialog box.

Data tab

Configuration field description

Interactive Panel

Description

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 icon in the upper-left corner.

3. In Blueprint Editor, click the Basic Pie Chart widget in the Import Nodes pane. You can view the basic pie chart configuration parameters in the canvas, as shown in the following figure.

   • Event

     Events	Description
     When the basic pie chart 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 basic pie chart interface request fails	The event that is returned when a data interface request fails (such as 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.
     When a data item is clicked	The event that is raised when a sector of the basic pie chart is selected, and the data item corresponding to the sector is also raised.
     When you click the legend	The event that is raised when the legend of a basic pie chart is selected, and the data item corresponding to the legend is also raised.

   • Action

     Action	Description
     Request a basic pie chart operation	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 basic pie chart interface is { id: '1'}, the final request interface is https://api.test?id=1.
     Import a basic pie chart	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.
     Highlight	Highlight the element corresponding to the data item. The following example shows the reference data. return { "data": {}, "options": { "style": { "stroke": "#f00", "fill": "" }, "selectMode": "single", "cancelHighlightFirst": false } }
     Unhighlight	Cancel the highlighting of the element corresponding to the data item. The following example shows the reference data. return { "data": {}, "options": { "mode": "single" } }
     Update component 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.
     Display	The following example shows the widget. return{ "animationType": "", "animationDuration": 1000, "animationEasing": "linear" }
     Hide	The following example shows the widget. return{ "animationType": "", "animationDuration": 1000, "animationEasing": "linear" }
     Switch to the hidden state	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" } }