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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
    ///
    /// [`TreeDragSourceExt`](trait.TreeDragSourceExt.html)
    pub struct TreeDragSource(Interface<gtk_sys::GtkTreeDragSource>);

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

pub const NONE_TREE_DRAG_SOURCE: Option<&TreeDragSource> = None;

/// Trait containing all `TreeDragSource` methods.
///
/// # Implementors
///
/// [`ListStore`](struct.ListStore.html), [`TreeDragSource`](struct.TreeDragSource.html), [`TreeModelFilter`](struct.TreeModelFilter.html), [`TreeModelSort`](struct.TreeModelSort.html), [`TreeStore`](struct.TreeStore.html)
pub trait TreeDragSourceExt: 'static {
    /// Asks the `TreeDragSource` to delete the row at `path`, because
    /// it was moved somewhere else via drag-and-drop. Returns `false`
    /// if the deletion fails because `path` no longer exists, or for
    /// some model-specific reason. Should robustly handle a `path` no
    /// longer found in the model!
    /// ## `path`
    /// row that was being dragged
    ///
    /// # Returns
    ///
    /// `true` if the row was successfully deleted
    fn drag_data_delete(&self, path: &mut TreePath) -> bool;

    /// Asks the `TreeDragSource` to fill in `selection_data` with a
    /// representation of the row at `path`. `selection_data`->target gives
    /// the required type of the data. Should robustly handle a `path` no
    /// longer found in the model!
    /// ## `path`
    /// row that was dragged
    /// ## `selection_data`
    /// a `SelectionData` to fill with data
    ///  from the dragged row
    ///
    /// # Returns
    ///
    /// `true` if data of the required type was provided
    fn drag_data_get(&self, path: &mut TreePath, selection_data: &mut SelectionData) -> bool;

    /// Asks the `TreeDragSource` whether a particular row can be used as
    /// the source of a DND operation. If the source doesn’t implement
    /// this interface, the row is assumed draggable.
    /// ## `path`
    /// row on which user is initiating a drag
    ///
    /// # Returns
    ///
    /// `true` if the row can be dragged
    fn row_draggable(&self, path: &mut TreePath) -> bool;
}

impl<O: IsA<TreeDragSource>> TreeDragSourceExt for O {
    fn drag_data_delete(&self, path: &mut TreePath) -> bool {
        unsafe {
            from_glib(gtk_sys::gtk_tree_drag_source_drag_data_delete(
                self.as_ref().to_glib_none().0,
                path.to_glib_none_mut().0,
            ))
        }
    }

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

    fn row_draggable(&self, path: &mut TreePath) -> bool {
        unsafe {
            from_glib(gtk_sys::gtk_tree_drag_source_row_draggable(
                self.as_ref().to_glib_none().0,
                path.to_glib_none_mut().0,
            ))
        }
    }
}

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