86 lines
2.0 KiB
Rust
86 lines
2.0 KiB
Rust
use crate::{Axis, AxisT, Len, Painter, SizeCtx};
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use std::any::Any;
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mod data;
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mod handle;
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mod like;
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mod tag;
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mod widgets;
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pub use data::*;
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pub use handle::*;
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pub use like::*;
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pub use tag::*;
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pub use widgets::*;
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pub trait Widget: Any {
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fn draw(&mut self, painter: &mut Painter);
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fn desired_width(&mut self, ctx: &mut SizeCtx) -> Len;
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fn desired_height(&mut self, ctx: &mut SizeCtx) -> Len;
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}
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pub trait WidgetAxisFns {
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fn desired_len<A: AxisT>(&mut self, ctx: &mut SizeCtx) -> Len;
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}
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impl<W: Widget + ?Sized> WidgetAxisFns for W {
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fn desired_len<A: AxisT>(&mut self, ctx: &mut SizeCtx) -> Len {
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match A::get() {
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Axis::X => self.desired_width(ctx),
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Axis::Y => self.desired_height(ctx),
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}
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}
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}
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impl Widget for () {
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fn draw(&mut self, _: &mut Painter) {}
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fn desired_width(&mut self, _: &mut SizeCtx) -> Len {
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Len::ZERO
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}
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fn desired_height(&mut self, _: &mut SizeCtx) -> Len {
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Len::ZERO
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}
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}
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impl dyn Widget {
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pub fn as_any(&self) -> &dyn Any {
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self
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}
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pub fn as_any_mut(&mut self) -> &mut dyn Any {
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self
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}
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}
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/// A function that returns a widget given a UI.
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/// Useful for defining trait functions on widgets that create a parent widget so that the children
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/// don't need to be IDs yet
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pub trait WidgetFn<State, W: Widget + ?Sized>: FnOnce(&mut State) -> W {}
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impl<State, W: Widget + ?Sized, F: FnOnce(&mut State) -> W> WidgetFn<State, W> for F {}
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pub struct WidgetArr<const LEN: usize> {
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pub arr: [WidgetHandle; LEN],
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}
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impl<const LEN: usize> WidgetArr<LEN> {
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pub fn new(arr: [WidgetHandle; LEN]) -> Self {
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Self { arr }
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}
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}
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pub trait WidgetOption<State> {
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fn get(self, state: &mut State) -> Option<WidgetHandle>;
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}
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impl<State> WidgetOption<State> for () {
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fn get(self, _: &mut State) -> Option<WidgetHandle> {
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None
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}
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}
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impl<State, F: FnOnce(&mut State) -> Option<WidgetHandle>> WidgetOption<State> for F {
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fn get(self, state: &mut State) -> Option<WidgetHandle> {
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self(state)
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}
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}
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