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beforeCellsValidation

Description​

Fires before cells of the swimlane are validated

Usage​

beforeCellsValidation: (
    swimlaneId: string | number, 
    action: "move" | "remove" | "add"
) => boolean | void;

Parameters​

The callback of the event takes the following parameters:

  • swimlaneId - (required) the id of the item
  • action - (required) the type of the action

Returns​

Return false to prevent validation of new cells, otherwise true

Example​

// initializing Diagram
const diagram = new dhx.Diagram("diagram_container", {
    type: "default"
});
// loading data
diagram.data.parse(data);

// attaching a handler to the event
diagram.events.on("beforeCellsValidation", (swimlaneId, action) => {
    console.log(swimlaneId, action);
    return true;
});

Change log: Added in v4.0

Related articles: Configuring Swimlanes