103 lines
2.8 KiB
Rust
103 lines
2.8 KiB
Rust
// Copyright 2022 System76 <info@system76.com>
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// SPDX-License-Identifier: MPL-2.0
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use iced::Color;
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use iced_core::Widget;
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pub trait ElementExt {
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#[must_use]
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fn debug(self, debug: bool) -> Self;
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}
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impl<'a, Message: 'static> ElementExt for crate::Element<'a, Message> {
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fn debug(self, debug: bool) -> Self {
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if debug {
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self.explain(Color::WHITE)
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} else {
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self
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}
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}
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}
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/// Additional methods for the [`Column`] and [`Row`] widgets.
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pub trait CollectionWidget<'a, Message: 'a>:
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Widget<Message, crate::Theme, crate::Renderer>
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where
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Self: Sized,
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{
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/// Moves all the elements of `other` into `self`, leaving `other` empty.
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#[must_use]
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fn append<E>(self, other: &mut Vec<E>) -> Self
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where
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E: Into<crate::Element<'a, Message>>;
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/// Appends all elements in an iterator to the widget.
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#[must_use]
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fn extend<E>(mut self, iterator: impl Iterator<Item = E>) -> Self
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where
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E: Into<crate::Element<'a, Message>>,
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{
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for item in iterator {
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self = self.push(item.into());
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}
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self
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}
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/// Pushes an element into the widget.
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#[must_use]
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fn push(self, element: impl Into<crate::Element<'a, Message>>) -> Self;
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/// Conditionally pushes an element to the widget.
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#[must_use]
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fn push_maybe(self, element: Option<impl Into<crate::Element<'a, Message>>>) -> Self {
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if let Some(element) = element {
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self.push(element.into())
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} else {
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self
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}
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}
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}
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impl<'a, Message: 'a> CollectionWidget<'a, Message> for crate::widget::Column<'a, Message> {
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fn append<E>(self, other: &mut Vec<E>) -> Self
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where
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E: Into<crate::Element<'a, Message>>,
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{
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self.extend(other.drain(..).map(Into::into))
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}
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fn push(self, element: impl Into<crate::Element<'a, Message>>) -> Self {
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self.push(element)
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}
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}
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impl<'a, Message: 'a> CollectionWidget<'a, Message> for crate::widget::Row<'a, Message> {
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fn append<E>(self, other: &mut Vec<E>) -> Self
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where
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E: Into<crate::Element<'a, Message>>,
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{
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self.extend(other.drain(..).map(Into::into))
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}
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fn push(self, element: impl Into<crate::Element<'a, Message>>) -> Self {
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self.push(element)
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}
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}
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pub trait ColorExt {
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/// Combines color with background to create appearance of transparency.
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#[must_use]
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fn blend_alpha(self, background: Self, alpha: f32) -> Self;
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}
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impl ColorExt for iced::Color {
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fn blend_alpha(self, background: Self, alpha: f32) -> Self {
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Self {
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a: 1.0,
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r: (self.r - background.r).mul_add(alpha, background.r),
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g: (self.g - background.g).mul_add(alpha, background.g),
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b: (self.b - background.b).mul_add(alpha, background.b),
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}
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}
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}
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