64 lines
1.5 KiB
Rust
64 lines
1.5 KiB
Rust
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 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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use crate::layout::{Len, Painter, SizeCtx, Ui};
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pub trait Widget: 'static {
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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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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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/// 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<W: Widget + ?Sized>: FnOnce(&mut Ui) -> W {}
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impl<W: Widget, F: FnOnce(&mut Ui) -> W> WidgetFn<W> for F {}
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impl<W: Widget, F: FnOnce(&mut Ui) -> W> WidgetLike<FnTag> for F {
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type Widget = W;
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fn add(self, ui: &mut Ui) -> WidgetRef<W> {
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self(ui).add(ui)
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}
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}
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impl<W: Widget> WidgetLike<WidgetTag> for W {
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type Widget = W;
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fn add(self, ui: &mut Ui) -> WidgetRef<W> {
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ui.add_widget(self)
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}
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}
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pub trait WidgetOption {
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fn get(self, ui: &mut Ui) -> Option<WidgetRef>;
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}
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impl WidgetOption for () {
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fn get(self, _: &mut Ui) -> Option<WidgetRef> {
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None
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}
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}
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impl<F: FnOnce(&mut Ui) -> Option<WidgetRef>> WidgetOption for F {
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fn get(self, ui: &mut Ui) -> Option<WidgetRef> {
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self(ui)
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}
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}
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