gtk 0.6.0

Rust bindings for the GTK+ 3 library
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131

// Copyright 2013-2015, The Gtk-rs Project Developers.
// See the COPYRIGHT file at the top-level directory of this distribution.
// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>

use SortType;
use ffi;
use glib::object::{Cast, IsA};
use glib::translate::*;
use std::mem::{self, transmute};
use std::cmp::Ordering;

use glib_ffi::gpointer;
use {TreeIter, TreeModel, TreeSortable};
use ffi::{GtkTreeIter, GtkTreeModel};

pub enum SortColumn {
    Default,
    Index(u32),
}

#[doc(hidden)]
impl ToGlib for SortColumn {
    type GlibType = i32;

    #[inline]
    fn to_glib(&self) -> i32 {
        match *self {
            SortColumn::Default => ffi::GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID,
            SortColumn::Index(x) => {
                assert!(x <= i32::max_value() as u32, "column index is too big");
                x as i32
            }
        }
    }
}

#[doc(hidden)]
impl FromGlib<i32> for SortColumn {
    #[inline]
    fn from_glib(val: i32) -> SortColumn {
        skip_assert_initialized!();
        match val {
            ffi::GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID => SortColumn::Default,
            x => {
                assert!(x >= 0, "invalid column index");
                SortColumn::Index(x as u32)
            }
        }
    }
}

pub trait TreeSortableExtManual: 'static {
    fn set_default_sort_func<F>(&self, sort_func: F)
        where F: Fn(&Self, &TreeIter, &TreeIter) -> Ordering + 'static;
    fn set_sort_func<F>(&self, sort_column_id: SortColumn, sort_func: F)
        where F: Fn(&Self, &TreeIter, &TreeIter) -> Ordering + 'static;
    fn get_sort_column_id(&self) -> Option<(SortColumn, SortType)>;
    fn set_sort_column_id(&self, sort_column_id: SortColumn, order: SortType);
    fn set_unsorted(&self);
}

unsafe extern "C" fn trampoline<T, F: Fn(&T, &TreeIter, &TreeIter) -> Ordering>(this: *mut GtkTreeModel, iter: *mut GtkTreeIter,
                                   iter2: *mut GtkTreeIter, f: gpointer) -> i32
where T: IsA<TreeSortable> {
    let f: &F = transmute(f);
    f(&TreeModel::from_glib_none(this).unsafe_cast(), &from_glib_borrow(iter),
      &from_glib_borrow(iter2)).to_glib()
}

unsafe extern "C" fn destroy_closure<T, F: Fn(&T, &TreeIter, &TreeIter) -> Ordering>(ptr: gpointer) {
    Box::<F>::from_raw(ptr as *mut _);
}

fn into_raw<F, T>(func: F) -> gpointer
    where F: Fn(&T, &TreeIter, &TreeIter) -> Ordering + 'static {
    skip_assert_initialized!();
    let func: Box<F> = Box::new(func);
    Box::into_raw(func) as gpointer
}

impl<O: IsA<TreeSortable>> TreeSortableExtManual for O {
    #[inline]
    fn get_sort_column_id(&self) -> Option<(SortColumn, SortType)> {
        unsafe {
            let mut sort_column_id = mem::uninitialized();
            let mut order = mem::uninitialized();
            ffi::gtk_tree_sortable_get_sort_column_id(self.as_ref().to_glib_none().0, &mut sort_column_id, &mut order);
            if sort_column_id != ffi::GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID {
                Some((from_glib(sort_column_id), from_glib(order)))
            } else {
                None
            }
        }
    }

    fn set_default_sort_func<F>(&self, sort_func: F)
    where F: Fn(&Self, &TreeIter, &TreeIter) -> Ordering + 'static {
        unsafe {
            ffi::gtk_tree_sortable_set_default_sort_func(self.as_ref().to_glib_none().0,
                                                         Some(trampoline::<Self, F>),
                                                         into_raw(sort_func),
                                                         Some(destroy_closure::<Self, F>))
        }
    }

    #[inline]
    fn set_sort_column_id(&self, sort_column_id: SortColumn, order: SortType) {
        unsafe {
            ffi::gtk_tree_sortable_set_sort_column_id(self.as_ref().to_glib_none().0, sort_column_id.to_glib(), order.to_glib());
        }
    }

    fn set_unsorted(&self) {
        unsafe {
            ffi::gtk_tree_sortable_set_sort_column_id(self.as_ref().to_glib_none().0,
                                                      ffi::GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID,
                                                      SortType::Ascending.to_glib());
        }
    }

    fn set_sort_func<F>(&self, sort_column_id: SortColumn, sort_func: F)
    where F: Fn(&Self, &TreeIter, &TreeIter) -> Ordering + 'static {
        unsafe {
            ffi::gtk_tree_sortable_set_sort_func(self.as_ref().to_glib_none().0,
                                                 sort_column_id.to_glib(),
                                                 Some(trampoline::<Self, F>),
                                                 into_raw(sort_func),
                                                 Some(destroy_closure::<Self, F>))
        }
    }
}