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

//! The widget that contains a layout

use crate::layout;
use crate::widget;

#[derive(Default)]
pub struct LayoutWidget {
    stub: widget::WidgetStub,
    width_expandable: bool,
    height_expandable: bool,

    width_locked: bool,
    height_locked: bool,
}

impl LayoutWidget {
    pub(crate) fn set_expandable(&mut self, we: bool, he: bool) {
        self.width_expandable = we && !self.width_locked;
        self.height_expandable = he && !self.height_locked;
    }

    pub fn lock_width(&mut self) {
        self.width_locked = true;
    }
    pub fn lock_height(&mut self) {
        self.height_locked = true;
    }
}

impl widget::Widget for LayoutWidget {
    fn stub (&self) -> &widget::WidgetStub {
        &self.stub
    }
    fn stub_mut (&mut self) -> &mut widget::WidgetStub {
        &mut self.stub
    }

    fn width_expandable(&self) -> bool { self.width_expandable }
    fn height_expandable(&self) -> bool { self.height_expandable }

    fn sized_width(&self) -> bool { true }
    fn sized_height(&self) -> bool { true }
    fn pointer_enter_wrap(&mut self) {}
    fn pointer_leave_wrap(&mut self) {}
}


pub struct LayoutWidgetHandle<L: layout::Layouter, W: widget::Widget> {
    widget_handle: widget::WidgetHandle<W>,
    layouter: L
}

impl<L: layout::Layouter, W: widget::Widget> Clone for LayoutWidgetHandle<L, W> {
    fn clone(&self) -> Self {
        LayoutWidgetHandle::<L, W> {
            widget_handle: self.widget_handle,
            layouter: L::default()
        }
    }
}

impl<L: layout::Layouter, W: widget::Widget> Copy for LayoutWidgetHandle<L, W> { }

impl<L: layout::Layouter, W: widget::Widget> LayoutWidgetHandle<L, W> {
    pub fn new(widget_handle: widget::WidgetHandle<W>) -> LayoutWidgetHandle<L, W> {
        LayoutWidgetHandle { widget_handle, layouter: L::default() }
    }
    pub fn widget(&self) -> widget::WidgetHandle<W> {
        self.widget_handle
    }

    pub fn layouter(&mut self) -> &mut L {
        &mut self.layouter
    }
    pub fn expandable() -> (bool, bool) {
        L::expandable()
    }
}