Hex.Document.read_async

### Method

# Hex Documentread_async

#### Declaration

    void
    hex_document_read_async (
      HexDocument* doc,
      GCancellable* cancellable,
      GAsyncReadyCallback callback,
      gpointer user_data
    )

#### Description

Read the `GFile` into the buffer connected to the `HexDocument` object.

This method is mostly a wrapper around `hex_buffer_read_async()` but will allow additional steps and appropriate signals to be emitted applicable to the document object above and beyond the buffer, when the operation completes.

#### Parameters

`cancellable` | `GCancellable`
| A `GCancellable`.
| The argument can be `NULL`.
| The data is owned by the caller of the function.
`callback` | `GAsyncReadyCallback`
| Function to be called when the operation is complete.
| The argument can be `NULL`.
`user_data` | `gpointer`
| No description available.
| The argument can be `NULL`.
| The data is owned by the caller of the function.