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// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use glib::object::IsA;
use glib::translate::*;
use gtk_sys;
use std::fmt;
use SelectionData;
use TreePath;

glib_wrapper! {
    ///
    ///
    /// # Implements
    ///
    /// [`TreeDragDestExt`](trait.TreeDragDestExt.html)
    pub struct TreeDragDest(Interface<gtk_sys::GtkTreeDragDest>);

    match fn {
        get_type => || gtk_sys::gtk_tree_drag_dest_get_type(),
    }
}

pub const NONE_TREE_DRAG_DEST: Option<&TreeDragDest> = None;

/// Trait containing all `TreeDragDest` methods.
///
/// # Implementors
///
/// [`ListStore`](struct.ListStore.html), [`TreeDragDest`](struct.TreeDragDest.html), [`TreeStore`](struct.TreeStore.html)
pub trait TreeDragDestExt: 'static {
    /// Asks the `TreeDragDest` to insert a row before the path `dest`,
    /// deriving the contents of the row from `selection_data`. If `dest` is
    /// outside the tree so that inserting before it is impossible, `false`
    /// will be returned. Also, `false` may be returned if the new row is
    /// not created for some model-specific reason. Should robustly handle
    /// a `dest` no longer found in the model!
    /// ## `dest`
    /// row to drop in front of
    /// ## `selection_data`
    /// data to drop
    ///
    /// # Returns
    ///
    /// whether a new row was created before position `dest`
    fn drag_data_received(&self, dest: &mut TreePath, selection_data: &mut SelectionData) -> bool;

    /// Determines whether a drop is possible before the given `dest_path`,
    /// at the same depth as `dest_path`. i.e., can we drop the data in
    /// `selection_data` at that location. `dest_path` does not have to
    /// exist; the return value will almost certainly be `false` if the
    /// parent of `dest_path` doesn’t exist, though.
    /// ## `dest_path`
    /// destination row
    /// ## `selection_data`
    /// the data being dragged
    ///
    /// # Returns
    ///
    /// `true` if a drop is possible before `dest_path`
    fn row_drop_possible(
        &self,
        dest_path: &mut TreePath,
        selection_data: &mut SelectionData,
    ) -> bool;
}

impl<O: IsA<TreeDragDest>> TreeDragDestExt for O {
    fn drag_data_received(&self, dest: &mut TreePath, selection_data: &mut SelectionData) -> bool {
        unsafe {
            from_glib(gtk_sys::gtk_tree_drag_dest_drag_data_received(
                self.as_ref().to_glib_none().0,
                dest.to_glib_none_mut().0,
                selection_data.to_glib_none_mut().0,
            ))
        }
    }

    fn row_drop_possible(
        &self,
        dest_path: &mut TreePath,
        selection_data: &mut SelectionData,
    ) -> bool {
        unsafe {
            from_glib(gtk_sys::gtk_tree_drag_dest_row_drop_possible(
                self.as_ref().to_glib_none().0,
                dest_path.to_glib_none_mut().0,
                selection_data.to_glib_none_mut().0,
            ))
        }
    }
}

impl fmt::Display for TreeDragDest {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "TreeDragDest")
    }
}