zng_wgt_dialog/
backdrop.rs

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1//! Modal backdrop widget.
2
3use zng_wgt::{prelude::*, *};
4use zng_wgt_container::Container;
5use zng_wgt_fill::background_color;
6use zng_wgt_input::gesture::{ClickArgs, on_click};
7use zng_wgt_layer::popup::POPUP_CLOSE_REQUESTED_EVENT;
8use zng_wgt_style::{Style, StyleMix, impl_style_fn, style_fn};
9
10use crate::DIALOG;
11
12/// Modal dialog parent widget that fills the window.
13///
14/// This widget is instantiated by [`DIALOG`] automatically, you can only customize it by setting the [`style_fn`](fn@style_fn)
15/// contextual property. Note that the [`popup::close_delay`] and [`popup::is_close_delaying`] properties work with this widget.
16///
17/// [`popup::close_delay`]: fn@zng_wgt_layer::popup::close_delay
18/// [`popup::is_close_delaying`]: fn@zng_wgt_layer::popup::is_close_delaying
19#[widget($crate::backdrop::DialogBackdrop {
20    ($child:expr) => {
21        child = $child;
22    }
23})]
24pub struct DialogBackdrop(StyleMix<Container>);
25impl DialogBackdrop {
26    fn widget_intrinsic(&mut self) {
27        self.style_intrinsic(STYLE_FN_VAR, property_id!(self::style_fn));
28
29        self.widget_builder()
30            .push_build_action(|b| b.push_intrinsic(NestGroup::EVENT, "popup-pump", backdrop_node));
31
32        widget_set! {
33            self;
34            style_base_fn = style_fn!(|_| DefaultStyle!());
35            modal = true;
36
37            on_click = hn!(|args: &ClickArgs| {
38                args.propagation().stop();
39                DIALOG.respond_default();
40            });
41        }
42    }
43}
44impl_style_fn!(DialogBackdrop);
45
46/// Share popup events with the dialog child.
47fn backdrop_node(child: impl UiNode) -> impl UiNode {
48    match_node(child, |c, op| match op {
49        UiNodeOp::Init => {
50            WIDGET.sub_event(&POPUP_CLOSE_REQUESTED_EVENT);
51        }
52        UiNodeOp::Event { update } => {
53            if let Some(args) = POPUP_CLOSE_REQUESTED_EVENT.on(update) {
54                for child in WIDGET.info().descendants() {
55                    if POPUP_CLOSE_REQUESTED_EVENT.is_subscriber(child.id()) {
56                        let mut delivery = UpdateDeliveryList::new_any();
57                        delivery.insert_wgt(&child);
58                        let update = POPUP_CLOSE_REQUESTED_EVENT.new_update_custom(args.clone(), delivery);
59                        c.event(&update);
60                    }
61                }
62            }
63        }
64        _ => {}
65    })
66}
67
68/// Dialog backdrop default style.
69#[widget($crate::backdrop::DefaultStyle)]
70pub struct DefaultStyle(Style);
71impl DefaultStyle {
72    fn widget_intrinsic(&mut self) {
73        widget_set! {
74            self;
75
76            #[easing(250.ms())]
77            background_color = colors::BLACK.transparent();
78            zng_wgt_layer::popup::close_delay = 250.ms();
79            when *#is_inited && !*#zng_wgt_layer::popup::is_close_delaying {
80                background_color = colors::BLACK.with_alpha(20.pct());
81            }
82        }
83    }
84}
zng_wgt_dialog/backdrop.rs

zng_wgt_dialog/
backdrop.rs
