com.smartgwt.client.widgets.events

## Interface DragStartHandler

- All Superinterfaces:
    EventHandler

      public interface DragStartHandler
      extends EventHandler

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `onDragStart(DragStartEvent event)` Executed when dragging first starts.

- - ### Method Detail

    - #### onDragStart

          void onDragStart(DragStartEvent event)

      Executed when dragging first starts. Your widget can use this opportunity to set things up for the drag, such as setting the drag tracker. Returning false from this event handler will cancel the drag action entirely.

      A drag action is considered to be begin when the mouse has moved `dragStartDistance` with the left mouse down.

      Parameters:
        `event` - the event