130 lines
3.1 KiB
Rust
130 lines
3.1 KiB
Rust
use dioxus_core::Event;
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use std::fmt::Formatter;
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use crate::geometry::WheelDelta;
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pub type WheelEvent = Event<WheelData>;
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pub struct WheelData {
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inner: Box<dyn HasWheelData>,
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}
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impl<E: HasWheelData> From<E> for WheelData {
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fn from(e: E) -> Self {
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Self { inner: Box::new(e) }
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}
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}
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impl std::fmt::Debug for WheelData {
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fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
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f.debug_struct("WheelData")
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.field("delta", &self.delta())
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.finish()
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}
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}
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impl PartialEq for WheelData {
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fn eq(&self, other: &Self) -> bool {
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self.inner.delta() == other.inner.delta()
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}
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}
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impl WheelData {
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/// Create a new WheelData
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pub fn new(inner: impl HasWheelData + 'static) -> Self {
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Self {
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inner: Box::new(inner),
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}
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}
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/// The amount of wheel movement
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#[allow(deprecated)]
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pub fn delta(&self) -> WheelDelta {
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self.inner.delta()
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}
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/// Downcast this event to a concrete event type
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pub fn downcast<T: 'static>(&self) -> Option<&T> {
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self.inner.as_any().downcast_ref::<T>()
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}
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}
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#[cfg(feature = "serialize")]
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/// A serialized version of WheelData
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#[derive(serde::Serialize, serde::Deserialize, Debug, PartialEq, Clone)]
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pub struct SerializedWheelData {
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pub delta_mode: u32,
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pub delta_x: f64,
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pub delta_y: f64,
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pub delta_z: f64,
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}
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#[cfg(feature = "serialize")]
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impl SerializedWheelData {
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/// Create a new SerializedWheelData
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pub fn new(delta: WheelDelta) -> Self {
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let delta_mode = match delta {
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WheelDelta::Pixels(_) => 0,
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WheelDelta::Lines(_) => 1,
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WheelDelta::Pages(_) => 2,
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};
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let delta_raw = delta.strip_units();
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Self {
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delta_mode,
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delta_x: delta_raw.x,
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delta_y: delta_raw.y,
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delta_z: delta_raw.z,
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}
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}
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}
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#[cfg(feature = "serialize")]
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impl From<&WheelData> for SerializedWheelData {
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fn from(data: &WheelData) -> Self {
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Self::new(data.delta())
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}
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}
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#[cfg(feature = "serialize")]
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impl HasWheelData for SerializedWheelData {
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fn delta(&self) -> WheelDelta {
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WheelDelta::from_web_attributes(self.delta_mode, self.delta_x, self.delta_y, self.delta_z)
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}
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fn as_any(&self) -> &dyn std::any::Any {
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self
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}
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}
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#[cfg(feature = "serialize")]
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impl serde::Serialize for WheelData {
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fn serialize<S: serde::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
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SerializedWheelData::from(self).serialize(serializer)
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}
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}
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#[cfg(feature = "serialize")]
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impl<'de> serde::Deserialize<'de> for WheelData {
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fn deserialize<D: serde::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
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let data = SerializedWheelData::deserialize(deserializer)?;
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Ok(Self {
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inner: Box::new(data),
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})
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}
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}
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impl_event![
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WheelData;
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/// Called when the mouse wheel is rotated over an element.
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onwheel
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];
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pub trait HasWheelData: std::any::Any {
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/// The amount of wheel movement
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fn delta(&self) -> WheelDelta;
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/// return self as Any
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fn as_any(&self) -> &dyn std::any::Any;
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}
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