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Page Carousel

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This topic describes the chart styles of the page carousel widget and the meaning of each configuration items.

Chart Style

A carousel page is a type of basic interaction component. You can configure only the properties of a page in the data, including the ID, page name, and link. It is suitable for displaying multiple web pages in a carousel in a visualization application. image..png

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 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.

  • Carousel: specifies whether to enable automatic carousel of multiple pages.

  • Intervals (s): the interval to rotate the pages. This parameter appears only when you turn on Carousel.

Data Panel

The Data tab of the page carousel widget contains Data Interface (All Pages) and Data Interface (Current Page).

  • Data Interface (All Pages) 大屏轮播数据接口

    Configuration field description

    Parameter

    Description

    id

    The ID of a page in the widget.

    serieName

    The name of a page in the widget.

    url

    The URL of a page in the widget.

  • Data Interface (Current Page)当前大屏数据接口

    id: the ID of a page in the widget.

    • When static data is used, this id only defines the page to be displayed when the carousel page is initialized, which must correspond to the page id in the large screen carousel data interface.

    • If the widget uses a dynamic data source, such as a database or API, the value of the id parameter can be dynamically obtained from an interaction widget, such as a timeline and tab list. You can change an element in the interaction widget to rotate to a specific page. The format of the id value returned by the dynamic data must be consistent with this id and correspond to the page id in the large screen carousel data interface.

    We recommend that you use the dynamic data. For more information, see Use the callback ID of DataV to implement chart linkage and Configure the callback ID of a ticker board widget.

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 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 Page Carousel widget in the Import Nodes pane. On the canvas, you can view the parameters of the page, as shown in the following figure. 节点编程参数配置

    • Event

      Event

      Description

      When the large screen carousel 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 the current big screen 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 request fails to be sent to a data port in the large screen carousel

      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.

      The error message returned because the request to the Dashboards operation 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.

    • Policy Action

      Policy Action

      Description

      Request a data interface for large screen carousel

      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 data interface is { id: '1'}, the final request interface is https://api.test?id=1.

      Request the current big screen data interface

      This action takes parameters passed by an upstream data processing node or widget and requests data of the current page from the server. For example, if you set the API data source to https://api.test on the carousel page and the data passed to the request for the current big screen data interface is { id: '1'}, the final request interface is https://api.test?id=1.

      Interface for importing large screen carousel 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.

      Import data of the current big screen

      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.

      Obtain the current page information

      Returns the values of parameters such as the id and url of the current page.

      Update component configurations

      Style configurations of widgets are dynamically updated. Before this action is executed, you must click the widget in Canvas Editor, click the Settings tab in the right-side panel, and click Copy Configurations to... to obtain widget configurations. After that, change the style field for the data processing node in Blueprint Editor.

      Display

      Displays the widget. The following example shows the reference data. 

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

      Hide

      The following example shows how to hide a widget. 

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

      Switch to the implicit state

      Specifies whether to show or hide a widget. The following example shows the reference data. 

      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"
  }
};
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