DataV:The Stacked Column Chart widget

Chart Style

A vertical stacked column chart is a type of column chart. It can intelligently display multi-dimensional data differences in a small visualization application space. Supports custom y-axis intervals, multi-series data configuration, and stacked data display.

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 Configurations.
• Size: indicates the size of a widget, including its pixel width and height. You can click the 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 icon.
  • Click the icon to horizontally flip a widget.
  • Click the 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

  • Margins: the distance between the column chart area and the upper, lower, left, and right borders of the widget. Unit: pixels. Default value: pixels. Click the icon to control the display of custom margins.

  • Column Width: the width of the column. If the custom width is too large, different columns in the same group overlap. Set the width value with caution. Click the icon to control the display of the custom column width.

  • Areas Between Columns: the style of the connected area between columns of different categories and the same series of data. You can click the icon to control the display of the connected area.

    Parameter	Description
    Trigger Mode	The trigger method that is used to trigger the display in the Connected section. You can select Always Show, Hover, or Click.
    Stroke Color	The color of the stroke in the connected area.
    Fill Color	The fill color of the connected area.

  • Value Label: the style of the value label of each column. You can click the icon to display or hide the value label.

    Parameter	Description
    Position	The position of the value label text. Valid values: Top, Middle, and Bottom.
    Text Style	The font style, text weight, font size, and color of the value label text.
    Offset	The offset value of the value label in the horizontal and vertical directions.

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

    Parameter	Description
    Paging Allowed	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 relative to the start coordinate of the widget. Valides: Top Left, Top Center, Top Right, Bottom Left, Bottom Center, and Bottom Right.
    Legend Tags	The style of the legend tag, including setting the shape style of the legend tag and the size value of the legend tag.
    Legend Text	The style of the text in the legend, including setting the font style /text weight /font size and color of the text.

• Coordinate Axes: You can select X Axis or Y Axis.

  • X Axis

    • Show Axis: If you turn on the switch, the x-axis style in the widget is visible. If you turn off the switch, the x-axis style in the widget is invisible.

    • Data Type: the type of data on the x-axis.

      Parameter	Description
      Numerical	Supports numeric data such as integers and floating-point numbers.
      Category	Data of category types such as character and string is supported.
      Time	The data of the time type needs to be configured data format.

    • Axis Label: the style of the column chart x-axis label. You can click the icon to display or hide the x-axis label.

      Parameter	Description
      Data Format	The data format you want to display. This parameter is valid only for time-based and numeric data. Please refer to YYYY/MM/DD HH:mm:ss time, integer reference d and floating point reference .1f.
      Text Style	The font style, text weight, font size, and color of the x-axis label text.
      Quantity	The x-axis label shows the quantity value. You can click the icon to specify the number of labels on the x-axis.

    • Axis Title: the style of the column chart x-axis title. You can click the icon to display or hide the x-axis title.

      Parameter	Description
      Title	The text content of the x-axis title.
      Offset	The offset value of the x-axis title. Unit: px.
      Text Style	The font style, text weight, font size, and color of the x-axis title text.

    • Axis Line: the axis style of the column chart x-axis. You can click the icon to show or hide the axis style of the x-axis.

      Color: the color of the axis of the x-axis.

    • Grid Lines: the style of the column chart x-axis gridlines. You can click the icon to display or hide the x-axis gridlines.

      Color: the color of the x-axis grid lines.

  • Y Axis

    • Show Axis: If you turn on the switch, the y-axis style in the widget is visible. If you turn off the switch, the y-axis style in the widget is invisible.

    • Range: the range of the minimum value of the y-axis. You can customize the value or select the value. You can click the icon to display or hide the custom range of the y-axis.

      • 0: By default, the minimum value of the y-axis range is 0.

      • Min Data Value: the minimum value in the data.

      Note

      After you enable the custom data range for the y-axis, some minimum data may become invalid. We recommend that you disable the custom data range.

    • Data Format: the display format of the y-axis label value. You can select Default, 11 (integer), 11.1 (float), 11.11 (float), 11%, 11.1%, or 11.11%.

    • Axis Label: the style of the column chart y-axis label. You can click the icon to display or hide the y-axis label style.

      Parameter	Description
      Text Style	The font style, text weight, font size, and color of the y-axis label text.
      Quantity	The y-axis label shows the quantity value. You can click the icon to display or hide a custom number of y-axis labels.

    • Axis Title: the y-axis title style of the column chart. You can click the icon to display the y-axis title style.

      Parameter	Description
      Title	The text content of the y-axis title.
      Offset	The offset value of the y-axis title. Unit: px.
      Text Style	The font style, text weight, font size, and color of the title text on the y-axis.

    • Axis Line: the axis style of the column chart y-axis. You can click the icon to display the y-axis.

      Color: the color of the y-axis.

    • Grid Lines: the style of the column chart y-axis gridlines. You can click the icon to display or hide the y-axis gridlines.

      Color: the color of the grid lines on the y-axis.

• Series

  • CSV Data: If you turn on the switch, you can directly use the columns in the CSV data file to map to values and data series. If you turn off the switch, the Series Mapping configuration items take effect. You can click the icon to display or hide the CSV data switch.

    Parameter	Description
    Auto Extract	If you turn on the switch, the widget uses CSV data to automatically parse and display the fields. If you turn off the switch, the fields are not automatically parsed.
    Numeric Field Only	If you turn on the switch, CSV data is parsed only for fields of the data type. If you turn off the switch, CSV data is automatically parsed for all fields.

  • 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	Column Name /Field Name and Series Name configuration items. This parameter takes effect only when you turn on CSV Data and turn off Auto Parse Field configuration items. Column Name /Field Name: the data series field value. You can customize the field value. If the field is empty, the system displays s 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. Series Name: the display name of the data series series, which can be customized. Series S Value and Series Display configuration items take effect only when CSV Data is hidden and the Series Mapping configuration items switch is turned on. Series s Value: the data series mapping value, which can be customized. If you leave this parameter empty, the system displays s field values in the component data as series field mapping values. If this parameter is not empty, you must ensure the order in which data is returned. Series Display: the display name of the data series, which can be customized.
    Fill Color	The fill color of the column chart under this series.

  • Series Mapping: If you turn on the switch, this parameter takes effect when the data contains series s values. You can set the color and name of a specific series by using the Mapping Field parameter. If you turn off the switch, the Mapping Field configuration items is disabled.

• Other

  • Auxiliary Line: the auxiliary line style of the column chart. You can click the icon to enable or disable auxiliary lines.

    Parameter	Description
    Type	The type of the auxiliary line. Valid values: Min Value, Max Value, Average Value, and Median Value.
    Style	The style of the auxiliary line, including the color, line thickness, and line style of the auxiliary line.
    Auxiliary Description	The style of the secondary description, including the following: Description: the auxiliary description text. Position: the position of the text on the guide line. Offset: the horizontal or vertical offset of the text. Text Style: the style of the text, including the font style, weight, font size, and color.

  • Interaction Enhancement for Huge Amounts of Data: If the column chart contains too much data, you can set the data interaction enhancement style. You can click the icon to enable or disable the interaction enhancement effect.

    Parameter	Description
    Interaction Mode	The mode of data interaction. Valid values: Slider and Scroll Bar.
    Default Range	The range of data displayed on the thumbnail axis. The range can be from 0 to 1. This configuration items takes effect only when the Auxiliary Line style is enabled.
    Style	The thumbnail axis foreground and background colors. This configuration items takes effect only when the Auxiliary Line style is enabled.
    Direction	The orientation of the scroll bar. The orientation can be Horizontal or Vertical. This configuration items takes effect only when the Scroll Bar style is enabled.
    Width	The width of the data category column. This configuration items takes effect only when the Scroll Bar style is enabled.

  • Tooltip: The style of the dialog box that appears when you move the pointer over or click the column chart 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.
    Indicator	The style of the prompt indicator, including the width, line type, and color of the indicator. Click on the icon to turn the indicator on or off.
    Background Box	The background box style of the dialog box. Background Color: the background color of the dialog box. Padding: the inner margin of the dialog box. Unit: pixels. Borders Border Width: the border size of the dialog box. Unit: pixels. Border Color: The border color of the dialog box.

Data Panel

Parameter 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

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 Stacked Column Chart widget in the Added Nodes pane. On the canvas, you can configure the parameters for a stacked column chart, as shown in the following figure.

   • Event

     Event	Description
     On Completion of Data 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 Data 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.
     On Click of Data Item	The event that is raised when a column of a vertically stacked column chart is clicked, and the data item corresponding to the column is also raised.
     On Click of Legend	The event that is raised when the legend of a vertically stacked column chart is clicked, and the corresponding data item of the legend is also raised.

   • Action

     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 API data source is set to https://api.test for a vertical column chart and the data passed to the Request Data Interface is set to { id: '1'}, the final request interface is https://api.test?id=1.
     Import Data 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.
     Highlight	Highlight the element corresponding to the data item. Examples of reference data are as follows. return { "data": {}, "options": { "style": { "stroke": "#f00", "fill": "" }, "selectMode": "single", "cancelHighlightFirst": false } }
     Cancel Highlight	Cancels the highlighting of the element corresponding to the data item. Examples of reference data are as follows. return { "data": {}, "options": { "mode": "single" } }
     Clear Widget	A widget text is cleared without the need to specify parameters.
     Update Widget 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.
     Show	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" }
     Hide/Show	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	A widget is moved to a specified location. Examples of reference data are as follows. 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" } }