87 lines
2.6 KiB
Rust
87 lines
2.6 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 vertical 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::{LocalState, SegmentedButton, SegmentedVariant};
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use iced::{Length, Rectangle, Size};
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use iced_core::layout;
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/// A type marker defining the vertical variant of a [`SegmentedButton`].
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pub struct Vertical;
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/// Vertical [`SegmentedButton`].
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pub type VerticalSegmentedButton<'a, SelectionMode, Message> =
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SegmentedButton<'a, Vertical, SelectionMode, Message>;
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/// Vertical 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 vertical<SelectionMode, Message>(
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model: &Model<SelectionMode>,
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) -> SegmentedButton<Vertical, SelectionMode, Message>
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where
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Model<SelectionMode>: Selectable,
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SelectionMode: Default,
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{
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SegmentedButton::new(model)
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}
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impl<'a, SelectionMode, Message> SegmentedVariant
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for SegmentedButton<'a, Vertical, SelectionMode, Message>
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where
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Model<SelectionMode>: Selectable,
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SelectionMode: Default,
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{
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fn variant_appearance(
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theme: &crate::Theme,
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style: &crate::theme::SegmentedButton,
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) -> super::Appearance {
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theme.vertical(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.height = (bounds.height - (num as f32 * spacing) + spacing) / num as f32;
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if nth != 0 {
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bounds.y += (nth as f32 * bounds.height) + (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(
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&self,
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state: &mut LocalState,
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renderer: &crate::Renderer,
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limits: &layout::Limits,
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) -> layout::Node {
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let limits = limits.width(self.width);
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let (width, mut height) = self.max_button_dimensions(state, 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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height = (num as f32 * height) + (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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