# Wijmo_Grid_Detail.Flexgriddetailprovider ## Content

FlexGridDetailProvider Class

Implements detail rows for FlexGrid controls.

To add detail rows to a FlexGrid control, create an instance of a FlexGridDetailProvider and set the createDetailCell property to a function that creates elements to be displayed in the detail cells.

For example:

import { FlexGrid } from '@mescius/wijmo.grid';
import { FlexGridDetailProvider } from '@mescius/wijmo.grid.detail';

// create FlexGrid to show categories
let gridCat = new FlexGrid('#gridCat', {
    itemsSource: getCategories();
});

// add detail rows showing products in each category
let detailProvider = new FlexGridDetailProvider(gridCat, {
    createDetailCell: (row) => {
        let cell = document.createElement('div');
        new FlexGrid(cell, {
            itemsSource: getProducts(row.dataItem.CategoryID)
        });
        return cell;
    }
});

The FlexGridDetailProvider provides a detailVisibilityMode property that determines when the detail rows should be displayed.

The default value for this property is ExpandSingle, which adds collapse/expand icons to the row headers.

The example below shows how you can use a FlexGridDetailProvider to add different types of detail to the rows in a FlexGrid:

Example

Heirarchy

Constructors

Properties

Methods

Constructors

constructor

Properties

createDetailCell

createDetailCell: ICreateDetailCell

Gets or sets the callback function that creates detail cells.

The callback function takes a Row as a parameter and returns an HTML element representing the row details. For example:

// create detail cells for a given row
dp.createDetailCell = (row) => {
    let cell = document.createElement('div');
    new FlexGrid(cell, {
        itemsSource: getProducts(row.dataItem.CategoryID),
        headersVisibility: 'Column'
    });
    return cell;
};

detailVisibilityMode

detailVisibilityMode: DetailVisibilityMode

Gets or sets a value that determines when row details are displayed.

The default value for this property is DetailVisibilityMode.ExpandSingle.

disposeDetailCell

disposeDetailCell: IDisposeDetailCell

Gets or sets the callback function that disposes of detail cells.

The callback function takes a Row as a parameter and disposes of any resources associated with the detail cell.

This function is optional. Use it in cases where the createDetailCell function allocates resources that are not automatically garbage-collected.

grid

grid: FlexGrid

Gets the FlexGrid that owns this FlexGridDetailProvider.

isAnimated

isAnimated: boolean

Gets or sets a value that indicates whether to use animation when showing row details.

The default value for this property is false.

keyActionEnter

keyActionEnter: KeyAction

Gets or sets the action to perform when the ENTER key is pressed.

The default setting for this property is KeyAction.None, which lets the grid handle the key. The other option is KeyAction.ToggleDetail, which handles the Enter key to toggle the display of the row details.

maxHeight

maxHeight: number | null

Gets or sets the maximum height of the detail rows, in pixels.

The default value for this property is null, which means there's no upper limit to the detail row height.

rowHasDetail

rowHasDetail: IRowHasDetail

Gets or sets the callback function that determines whether a row has details.

The callback function takes a Row as a parameter and returns a boolean value that indicates whether the row has details. For example:

// remove details from items with odd CategoryID
dp.rowHasDetail = (row) => {
    return row.dataItem.CategoryID % 2 == 0;
};

Setting this property to null means all regular data rows (not group rows or new item templates) have details.

Methods

dispose

  • dispose(): void

  • Disposes of the control and all its resources.

    Returns void

getDetailRow

  • Gets the detail row associated with a given grid row.

    Parameters

    • row: any

      Row or index of the row to investigate.

    Returns DetailRow | null

hideDetail

  • hideDetail(row?: Row | number): void

  • Hides the detail row for a given row.

    Parameters

    • Optional row: Row | number

      Row or index of the row that will have its details hidden. This parameter is optional. If not provided, all detail rows are hidden.

    Returns void

isDetailAvailable

  • isDetailAvailable(row: any): boolean

  • Gets a value that determines if a row has details to show.

    Parameters

    • row: any

      Row or index of the row to investigate.

    Returns boolean

isDetailVisible

  • isDetailVisible(row: any): boolean

  • Gets a value that determines if a row's details are visible.

    Parameters

    • row: any

      Row or index of the row to investigate.

    Returns boolean

showDetail

  • showDetail(row: Row | number, hideOthers?: boolean): void

  • Shows the detail row for a given row.

    Parameters

    • row: Row | number

      Row or index of the row that will have its details shown.

    • Optional hideOthers: boolean

      Whether to hide details for all other rows.

    Returns void