kas 0.4.1

KAS GUI Toolkit
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
132
133
134

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License in the LICENSE-APACHE file or at:
//     https://www.apache.org/licenses/LICENSE-2.0

//! Trait impls

use super::*;
use crate::draw::{DrawHandle, SizeHandle};
use crate::event::{self, Event, Manager, Response};
use crate::geom::{Coord, Rect};
use crate::layout::{AxisInfo, SizeRules};
use crate::{AlignHints, CoreData, WidgetId};

impl<M: 'static> WidgetCore for Box<dyn Widget<Msg = M>> {
    fn as_any(&self) -> &dyn Any {
        self.as_ref().as_any()
    }
    fn as_any_mut(&mut self) -> &mut dyn Any {
        self.as_mut().as_any_mut()
    }

    fn core_data(&self) -> &CoreData {
        self.as_ref().core_data()
    }
    fn core_data_mut(&mut self) -> &mut CoreData {
        self.as_mut().core_data_mut()
    }

    fn widget_name(&self) -> &'static str {
        self.as_ref().widget_name()
    }

    fn as_widget(&self) -> &dyn WidgetConfig {
        self.as_ref().as_widget()
    }
    fn as_widget_mut(&mut self) -> &mut dyn WidgetConfig {
        self.as_mut().as_widget_mut()
    }
}

impl<M: 'static> WidgetChildren for Box<dyn Widget<Msg = M>> {
    fn len(&self) -> usize {
        self.as_ref().len()
    }
    fn get(&self, index: usize) -> Option<&dyn WidgetConfig> {
        self.as_ref().get(index)
    }
    fn get_mut(&mut self, index: usize) -> Option<&mut dyn WidgetConfig> {
        self.as_mut().get_mut(index)
    }

    fn find(&self, id: WidgetId) -> Option<&dyn WidgetConfig> {
        self.as_ref().find(id)
    }
    fn find_mut(&mut self, id: WidgetId) -> Option<&mut dyn WidgetConfig> {
        self.as_mut().find_mut(id)
    }

    fn walk(&self, f: &mut dyn FnMut(&dyn WidgetConfig)) {
        self.as_ref().walk(f);
    }
    fn walk_mut(&mut self, f: &mut dyn FnMut(&mut dyn WidgetConfig)) {
        self.as_mut().walk_mut(f);
    }
}

impl<M: 'static> WidgetConfig for Box<dyn Widget<Msg = M>> {
    fn configure(&mut self, mgr: &mut Manager) {
        self.as_mut().configure(mgr);
    }

    fn key_nav(&self) -> bool {
        self.as_ref().key_nav()
    }
    fn cursor_icon(&self) -> event::CursorIcon {
        self.as_ref().cursor_icon()
    }
}

impl<M: 'static> Layout for Box<dyn Widget<Msg = M>> {
    fn size_rules(&mut self, size_handle: &mut dyn SizeHandle, axis: AxisInfo) -> SizeRules {
        self.as_mut().size_rules(size_handle, axis)
    }

    fn set_rect(&mut self, rect: Rect, align: AlignHints) {
        self.as_mut().set_rect(rect, align);
    }

    fn find_id(&self, coord: Coord) -> Option<WidgetId> {
        self.as_ref().find_id(coord)
    }

    fn draw(&self, draw_handle: &mut dyn DrawHandle, mgr: &event::ManagerState, disabled: bool) {
        self.as_ref().draw(draw_handle, mgr, disabled);
    }
}

impl<M: 'static> event::Handler for Box<dyn Widget<Msg = M>> {
    type Msg = M;

    fn activation_via_press(&self) -> bool {
        self.as_ref().activation_via_press()
    }

    fn handle(&mut self, mgr: &mut Manager, event: Event) -> Response<Self::Msg> {
        self.as_mut().handle(mgr, event)
    }
}

impl<M: 'static> event::SendEvent for Box<dyn Widget<Msg = M>> {
    fn send(&mut self, mgr: &mut Manager, id: WidgetId, event: Event) -> Response<Self::Msg> {
        self.as_mut().send(mgr, id, event)
    }
}

impl<M: 'static> Widget for Box<dyn Widget<Msg = M>> {}

impl<M: 'static> Clone for Box<dyn Widget<Msg = M>> {
    fn clone(&self) -> Self {
        #[cfg(feature = "nightly")]
        unsafe {
            let mut x = Box::new_uninit();
            self.clone_to(x.as_mut_ptr());
            x.assume_init()
        }

        // Run-time failure is not ideal — but we would hit compile-issues which
        // don't necessarily correspond to actual usage otherwise due to
        // `derive(Clone)` on any widget produced by `make_widget!`.
        #[cfg(not(feature = "nightly"))]
        panic!("Clone for Box<dyn Widget> only supported on nightly");
    }
}