validate_row_changes

Description:

public virtual signal Error validate_row_changes (int row, int proxied_row)

Gets emitted when proxy is about to commit a row change to the proxied data model.

If any callback returns a non null value, then the change commit fails with the returned Error

Parameters:

row

the proxy's row
proxied_row

the proxied data model's row

Returns:

a new Error if validation failed, or null