Drag and drop autoscrolling

## Drag and drop autoscrolling Drag and drop autoscrolling — Autoscroll when dragged out of widget. |

## Synopsis

    void                fm_dnd_set_dest_auto_scroll         (GtkWidget *drag_dest_widget,
                                                             GtkAdjustment *hadj,
                                                             GtkAdjustment *vadj);
    void                fm_dnd_unset_dest_auto_scroll       (GtkWidget *drag_dest_widget);

## Description

`include`: libfm/fm-gtk.h

## Details

### fm_dnd_set_dest_auto_scroll ()

    void                fm_dnd_set_dest_auto_scroll         (GtkWidget *drag_dest_widget,
                                                             GtkAdjustment *hadj,
                                                             GtkAdjustment *vadj);

This function installs a "drag-motion" handler to the dest widget to support auto-scroll when the dragged item is near the margin of the destination widget. For example, when a user drags an item over the bottom of a GtkTreeView, the desired behavior should be to scroll up the content of the tree view and to expose the items below currently visible region. So the user can drop on them.

`drag_dest_widget` : | a drag destination widget
`hadj` : | horizontal GtkAdjustment
`vadj` : | vertical GtkAdjustment

### fm_dnd_unset_dest_auto_scroll ()

    void                fm_dnd_unset_dest_auto_scroll       (GtkWidget *drag_dest_widget);

Unsets what has been done by `fm_dnd_set_dest_auto_scroll()`

`drag_dest_widget` : | drag destination widget.