makepad_widgets/
nav_control.rs

1use crate::makepad_draw::*;
2
3
4live_design!{
5    import makepad_draw::shader::std::*;
6    
7    NavControlBase = {{NavControl}} {}
8}
9
10#[derive(Live, LiveHook)]
11pub struct NavControl {
12    #[live] draw_list: DrawList2d,
13    #[live] draw_focus: DrawQuad,
14    #[live] draw_text: DrawText,
15    #[rust] _recent_focus: Area,
16}
17
18impl NavControl {
19    
20    pub fn send_trigger_to_scroll_stack(cx: &mut Cx, stack:Vec<Area>){
21        let mut prev_area = None;
22        for next_area in stack{
23            if let Some(prev_area) = prev_area{
24                cx.send_trigger(prev_area, Trigger{
25                    id:live_id!(scroll_focus_nav),
26                    from:next_area
27                });
28            }
29            prev_area = Some(next_area);
30        }
31    }
32    
33    pub fn handle_event(&mut self, cx: &mut Cx, event: &Event, root: DrawListId) {
34        match event {
35            Event::KeyDown(ke) => match ke.key_code {
36                KeyCode::Tab => {
37                    if ke.modifiers.shift {
38                        let mut prev_area = Area::Empty;
39                        if let Some((prev_area, scroll_stack)) = Cx2d::iterate_nav_stops(cx, root, | cx, stop | {
40                            if cx.has_key_focus(stop.area) {
41                                return Some(prev_area);
42                            }
43                            prev_area = stop.area;
44                            None
45                        }) {
46                            if !prev_area.is_empty() {
47                                Self::send_trigger_to_scroll_stack(cx, scroll_stack);
48                                cx.set_key_focus(prev_area);
49                            }
50                        }
51                    }
52                    else {
53                        let mut next_stop = false;
54                        if let Some((next_area, scroll_stack)) = Cx2d::iterate_nav_stops(cx, root, | cx, stop | {
55                            if next_stop {
56                                return Some(stop.area)
57                            }
58                            if cx.has_key_focus(stop.area) {
59                                next_stop = true;
60                            }
61                            None
62                        }) {
63                            Self::send_trigger_to_scroll_stack(cx, scroll_stack);
64                            cx.set_key_focus(next_area);
65                        }
66                    }
67                }
68                _ => ()
69            },
70            _ => ()
71        }
72    }
73    
74    pub fn draw(&mut self, cx: &mut Cx2d) {
75        if !self.draw_list.begin(cx, Walk::default()).is_redrawing() {
76            return
77        }
78        
79        self.draw_list.end(cx);
80    }
81}
82
83
makepad_widgets/nav_control.rs

makepad_widgets/
nav_control.rs
