T07a navigation tabs and paths: tabs, editor tabs, tab overflow menu, breadcrumb, pagination, steps and wizard; shared slide, list trigger and tab stop
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use std::rc::Rc;
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use gpui::{
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Animation, AnimationExt, AnyElement, App, ElementId, FontWeight, InteractiveElement,
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IntoElement, ParentElement, RenderOnce, StatefulInteractiveElement, Styled, Window, div,
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prelude::*, relative,
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};
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use crate::{
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buttons::{Button, ButtonVariant},
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forms::{Choice, Run},
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motion,
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primitives::{FocusRing, Icon, IconName},
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theme::{ActiveTheme, ControlSize, IconSize, TextSize},
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};
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type OnStep = Rc<dyn Fn(usize, &mut Window, &mut App)>;
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/// Numbered steps joined by lines. Finished steps carry a check and can be revisited.
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#[derive(IntoElement)]
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pub struct Steps {
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id: ElementId,
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steps: Vec<Choice>,
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current: usize,
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vertical: bool,
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on_select: Option<OnStep>,
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}
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impl Steps {
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/// Each step's label is its title, its note a line of detail.
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pub fn new(
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id: impl Into<ElementId>,
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steps: impl IntoIterator<Item = Choice>,
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current: usize,
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) -> Self {
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let steps: Vec<Choice> = steps.into_iter().collect();
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assert!(
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current < steps.len(),
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"step {current} is past the last of {}",
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steps.len()
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);
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Self {
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id: id.into(),
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steps,
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current,
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vertical: false,
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on_select: None,
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}
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}
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pub fn vertical(mut self) -> Self {
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self.vertical = true;
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self
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}
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/// Runs when a finished step is clicked.
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pub fn on_select(mut self, handler: impl Fn(usize, &mut Window, &mut App) + 'static) -> Self {
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self.on_select = Some(Rc::new(handler));
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self
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}
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}
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impl RenderOnce for Steps {
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fn render(self, window: &mut Window, cx: &mut App) -> impl IntoElement {
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let turn = motion::changes((self.id.clone(), "current"), self.current, window, cx);
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let (current, vertical, count) = (self.current, self.vertical, self.steps.len());
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let duration = motion::duration(motion::SLOW, cx);
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let theme = cx.theme();
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let colors = &theme.colors;
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let mark = theme.control_height(ControlSize::Sm);
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let line = |ix: usize| {
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let filled = ix < current;
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let fill = div().bg(colors.accent).map(|fill| {
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if vertical {
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fill.w_full()
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} else {
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fill.h_full()
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}
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});
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let fill = if filled && ix + 1 == current && turn > 0 {
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fill.with_animation(
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("step-fill", turn),
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Animation::new(duration).with_easing(motion::ease_out_cubic),
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move |fill, t| {
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if vertical {
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fill.h(relative(t))
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} else {
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fill.w(relative(t))
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}
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},
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)
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.into_any_element()
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} else {
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let size = relative(if filled { 1.0 } else { 0.0 });
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(if vertical { fill.h(size) } else { fill.w(size) }).into_any_element()
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};
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div()
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.flex_1()
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.bg(colors.border)
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.map(|track| if vertical { track.w_px() } else { track.h_px() })
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.child(fill)
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};
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let steps = self.steps.into_iter().enumerate().map(|(ix, step)| {
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let (done, now) = (ix < current, ix == current);
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let circle = div()
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.flex()
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.flex_none()
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.items_center()
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.justify_center()
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.size(mark)
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.rounded_full()
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.text_size(theme.text_size(TextSize::Xs))
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.font_weight(FontWeight::SEMIBOLD)
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.map(|circle| {
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if done {
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circle.bg(colors.accent).child(
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Icon::new(IconName::Check)
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.size(IconSize::Xs)
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.color(colors.on_accent),
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)
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} else if now {
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circle
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.border_2()
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.border_color(colors.accent)
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.text_color(colors.fg)
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.child((ix + 1).to_string())
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} else {
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circle
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.border_1()
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.border_color(colors.border_strong)
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.text_color(colors.fg_subtle)
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.child((ix + 1).to_string())
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}
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});
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let words = div()
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.flex()
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.flex_col()
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.gap_0p5()
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.text_size(theme.text_size(TextSize::Sm))
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.text_color(if done || now {
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colors.fg
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} else {
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colors.fg_muted
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})
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.when(now, |words| words.font_weight(FontWeight::MEDIUM))
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.child(step.label)
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.when_some(step.note, |words, note| {
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words.child(
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div()
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.text_size(theme.text_size(TextSize::Xs))
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.text_color(colors.fg_subtle)
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.font_weight(FontWeight::NORMAL)
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.child(note),
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)
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});
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let select = self.on_select.clone().filter(|_| done);
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let head = div()
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.id(("step", ix))
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.flex()
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.items_center()
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.gap_2()
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.rounded_full()
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.border_1()
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.border_color(gpui::transparent_black())
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.when_some(select, |head, select| {
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head.cursor_pointer().tab_index(0).focus_ring(cx).on_click(
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move |_, window, cx| {
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log::info!("steps: back to {ix}");
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select(ix, window, cx)
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},
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)
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});
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let after = (ix + 1 < count).then(|| line(ix));
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if vertical {
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div()
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.flex()
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.gap_3()
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.child(
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div()
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.flex()
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.flex_col()
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.items_center()
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.gap_1()
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.child(head.child(circle))
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.children(after),
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)
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.child(div().pb_5().child(words))
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.into_any_element()
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} else {
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div()
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.flex()
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.flex_1()
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.items_center()
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.gap_3()
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.when(ix + 1 == count, |step| step.flex_none())
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.child(head.child(circle).child(words))
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.children(after)
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.into_any_element()
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}
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});
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div()
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.id(self.id)
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.flex()
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.when(vertical, |steps| steps.flex_col())
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.w_full()
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.children(steps)
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}
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}
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/// Steps, the current step's content, then Back and Next. Next becomes Finish on the last step.
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#[derive(IntoElement)]
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pub struct Wizard {
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id: ElementId,
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steps: Vec<Choice>,
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current: usize,
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content: Option<AnyElement>,
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ready: bool,
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on_step: Option<OnStep>,
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on_finish: Option<Run>,
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}
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impl Wizard {
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pub fn new(
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id: impl Into<ElementId>,
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steps: impl IntoIterator<Item = Choice>,
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current: usize,
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) -> Self {
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Self {
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id: id.into(),
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steps: steps.into_iter().collect(),
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current,
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content: None,
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ready: true,
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on_step: None,
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on_finish: None,
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}
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}
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/// The current step's content.
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pub fn content(mut self, content: impl IntoElement) -> Self {
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self.content = Some(content.into_any_element());
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self
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}
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/// Whether Next may run; the step's fields decide.
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pub fn ready(mut self, ready: bool) -> Self {
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self.ready = ready;
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self
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}
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/// Runs with the step Back, Next or a finished step leads to.
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pub fn on_step(mut self, handler: impl Fn(usize, &mut Window, &mut App) + 'static) -> Self {
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self.on_step = Some(Rc::new(handler));
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self
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}
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pub fn on_finish(mut self, handler: impl Fn(&mut Window, &mut App) + 'static) -> Self {
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self.on_finish = Some(Rc::new(handler));
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self
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}
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}
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impl RenderOnce for Wizard {
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fn render(self, window: &mut Window, cx: &mut App) -> impl IntoElement {
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let (current, last) = (self.current, self.steps.len().saturating_sub(1));
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let turn = motion::changes((self.id.clone(), "content"), current, window, cx);
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let step: OnStep = {
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let (id, on_step) = (self.id.clone(), self.on_step);
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Rc::new(move |to, window, cx| {
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log::info!("wizard {id:?}: step {to}");
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if let Some(on_step) = &on_step {
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on_step(to, window, cx);
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}
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})
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};
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let (back, next, jump) = (step.clone(), step.clone(), step);
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let finish = {
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let (id, on_finish) = (self.id.clone(), self.on_finish);
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move |window: &mut Window, cx: &mut App| {
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log::info!("wizard {id:?}: finished");
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if let Some(on_finish) = &on_finish {
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on_finish(window, cx);
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}
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}
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};
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let content = self.content.map(|content| {
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div().child(content).with_animation(
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("wizard-step", turn),
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Animation::new(motion::duration(motion::BASE, cx))
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.with_easing(motion::ease_out_cubic),
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move |content, t| {
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if turn == 0 {
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content
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} else {
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content.opacity(t).mt(motion::NUDGE * (1.0 - t))
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}
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},
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)
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});
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let advance = if current == last {
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Button::new("wizard-finish", "Finish")
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.primary()
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.disabled(!self.ready)
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.on_click(move |_, window, cx| finish(window, cx))
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} else {
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Button::new("wizard-next", "Next")
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.primary()
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.disabled(!self.ready)
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.on_click(move |_, window, cx| next(current + 1, window, cx))
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};
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div()
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.id(self.id.clone())
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.flex()
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.flex_col()
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.gap_6()
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.w_full()
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.child(
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Steps::new((self.id, "steps"), self.steps, current)
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.on_select(move |to, window, cx| jump(to, window, cx)),
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)
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.children(content)
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.child(
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div()
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.flex()
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.items_center()
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.justify_between()
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.child(
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Button::new("wizard-back", "Back")
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.variant(ButtonVariant::Ghost)
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.disabled(current == 0)
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.on_click(move |_, window, cx| back(current - 1, window, cx)),
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)
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.child(advance),
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)
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}
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}
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