Function

GtkTreeViewColumnDropFunc

since: 4.0

Declaration 

gboolean
(* GtkTreeViewColumnDropFunc) (
  GtkTreeView* tree_view,
  GtkTreeViewColumn* column,
  GtkTreeViewColumn* prev_column,
  GtkTreeViewColumn* next_column,
  gpointer data
)

Description [src]

Function type for determining whether column can be dropped in a particular spot (as determined by prev_column and next_column). In left to right locales, prev_column is on the left of the potential drop spot, and next_column is on the right. In right to left mode, this is reversed. This function should return TRUE if the spot is a valid drop spot. Please note that returning TRUE does not actually indicate that the column drop was made, but is meant only to indicate a possible drop spot to the user.

Available since: 4.0

Parameters

tree_view

Type: GtkTreeView

A GtkTreeView

The data is owned by the caller of the function.
column

Type: GtkTreeViewColumn

The GtkTreeViewColumn being dragged.

The data is owned by the caller of the function.
prev_column

Type: GtkTreeViewColumn

A GtkTreeViewColumn on one side of column.

The data is owned by the caller of the function.
next_column

Type: GtkTreeViewColumn

A GtkTreeViewColumn on the other side of column.

The data is owned by the caller of the function.
data

Type: gpointer

User data.

The argument can be NULL.
The data is owned by the caller of the function.

Return value

Type: gboolean

TRUE, if column can be dropped in this spot.