dioxus_html/events/
scroll.rs1use dioxus_core::Event;
2
3pub type ScrollEvent = Event<ScrollData>;
4
5pub struct ScrollData {
6 inner: Box<dyn HasScrollData>,
7}
8
9impl<E: HasScrollData> From<E> for ScrollData {
10 fn from(e: E) -> Self {
11 Self { inner: Box::new(e) }
12 }
13}
14
15impl ScrollData {
16 pub fn new(inner: impl HasScrollData + 'static) -> Self {
18 Self {
19 inner: Box::new(inner),
20 }
21 }
22
23 #[inline(always)]
25 pub fn downcast<T: 'static>(&self) -> Option<&T> {
26 self.inner.as_any().downcast_ref::<T>()
27 }
28}
29
30impl std::fmt::Debug for ScrollData {
31 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
32 f.debug_struct("ScrollData").finish()
33 }
34}
35
36impl PartialEq for ScrollData {
37 fn eq(&self, _other: &Self) -> bool {
38 true
39 }
40}
41
42#[cfg(feature = "serialize")]
43#[derive(serde::Serialize, serde::Deserialize, Debug, PartialEq, Clone)]
45pub struct SerializedScrollData {}
46
47#[cfg(feature = "serialize")]
48impl From<&ScrollData> for SerializedScrollData {
49 fn from(_: &ScrollData) -> Self {
50 Self {}
51 }
52}
53
54#[cfg(feature = "serialize")]
55impl HasScrollData for SerializedScrollData {
56 fn as_any(&self) -> &dyn std::any::Any {
57 self
58 }
59}
60
61#[cfg(feature = "serialize")]
62impl serde::Serialize for ScrollData {
63 fn serialize<S: serde::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
64 SerializedScrollData::from(self).serialize(serializer)
65 }
66}
67
68#[cfg(feature = "serialize")]
69impl<'de> serde::Deserialize<'de> for ScrollData {
70 fn deserialize<D: serde::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
71 let data = SerializedScrollData::deserialize(deserializer)?;
72 Ok(Self {
73 inner: Box::new(data),
74 })
75 }
76}
77
78pub trait HasScrollData: std::any::Any {
79 fn as_any(&self) -> &dyn std::any::Any;
81}
82
83impl_event! {
84 ScrollData;
85
86 onscroll
88}