93 lines
3 KiB
Rust
93 lines
3 KiB
Rust
// Copyright 2022 System76 <info@system76.com>
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// SPDX-License-Identifier: MPL-2.0
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//! Implementation details for the horizontal layout of a segmented button.
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use super::model::{Model, Selectable};
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use super::style::StyleSheet;
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use super::widget::{SegmentedButton, SegmentedVariant};
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use iced::{Length, Rectangle, Size};
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use iced_core::layout;
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/// Horizontal [`SegmentedButton`].
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pub type HorizontalSegmentedButton<'a, SelectionMode, Message, Renderer> =
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SegmentedButton<'a, Horizontal, SelectionMode, Message, Renderer>;
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/// A type marker defining the horizontal variant of a [`SegmentedButton`].
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pub struct Horizontal;
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/// Horizontal implementation of the [`SegmentedButton`].
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///
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/// For details on the model, see the [`segmented_button`](super) module for more details.
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#[must_use]
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pub fn horizontal<SelectionMode: Default, Message, Renderer>(
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model: &Model<SelectionMode>,
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) -> SegmentedButton<Horizontal, SelectionMode, Message, Renderer>
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where
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Renderer: iced_core::Renderer
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+ iced_core::text::Renderer
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+ iced_core::image::Renderer
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+ iced_core::svg::Renderer,
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Renderer::Theme: StyleSheet,
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Model<SelectionMode>: Selectable,
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{
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SegmentedButton::new(model)
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}
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impl<'a, SelectionMode, Message, Renderer> SegmentedVariant
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for SegmentedButton<'a, Horizontal, SelectionMode, Message, Renderer>
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where
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Renderer: iced_core::Renderer
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+ iced_core::text::Renderer
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+ iced_core::image::Renderer
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+ iced_core::svg::Renderer,
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Renderer::Theme: StyleSheet,
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Model<SelectionMode>: Selectable,
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SelectionMode: Default,
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{
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type Renderer = Renderer;
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fn variant_appearance(
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theme: &<Self::Renderer as iced_core::Renderer>::Theme,
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style: &<<Self::Renderer as iced_core::Renderer>::Theme as StyleSheet>::Style,
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) -> super::Appearance {
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theme.horizontal(style)
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}
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#[allow(clippy::cast_precision_loss)]
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fn variant_button_bounds(&self, mut bounds: Rectangle, nth: usize) -> Rectangle {
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let num = self.model.items.len();
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if num != 0 {
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let spacing = f32::from(self.spacing);
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bounds.width = (bounds.width - (num as f32 * spacing) + spacing) / num as f32;
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if nth != 0 {
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bounds.x += (nth as f32 * bounds.width) + (nth as f32 * spacing);
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}
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}
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bounds
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}
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#[allow(clippy::cast_precision_loss)]
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#[allow(clippy::cast_possible_truncation)]
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#[allow(clippy::cast_sign_loss)]
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fn variant_layout(&self, renderer: &Renderer, limits: &layout::Limits) -> layout::Node {
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let limits = limits.width(self.width);
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let (mut width, height) = self.max_button_dimensions(renderer, limits.max());
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let num = self.model.items.len();
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let spacing = f32::from(self.spacing);
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if num != 0 {
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width = (num as f32 * width) + (num as f32 * spacing) - spacing;
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}
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let size = limits
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.height(Length::Fixed(height))
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.resolve(Size::new(width, height));
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layout::Node::new(size)
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}
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}
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