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beforeColumnDrag

fires before dragging of a column has started

beforeColumnDrag: (data: IDragInfo, events: MouseEvent) => void | boolean;

Parameters:

  • data: object - data object
  • events: MouseEvent - a native HTML event object

Returns:

Return false to prevent dragging of a column; otherwise, true.

Example

treegrid.events.on("BeforeColumnDrag", function(data, events){    // your logic here    return false;});

The data object contains the following parameters:

start(string, number) the id of a column, from which the dragging process has started
source(array) an array with ids of dragged columns
target(string, number) the id of a potential target column

Change log:

  • added in v6.5
  • Before v7.0, the event took one parameter - the column id.
  • Starting from v7.0, the event takes two parameters: data and e.