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use super::*;
impl Context {
///
/// The spinner advances one frame per tick. Use [`SpinnerState::dots`] or
/// [`SpinnerState::line`] to create the state, then chain style methods to
/// color it.
pub fn spinner(&mut self, state: &SpinnerState) -> &mut Self {
self.styled(
state.frame(self.tick).to_string(),
Style::new().fg(self.theme.primary),
)
}
/// Render toast notifications. Calls `state.cleanup(tick)` automatically.
///
/// Expired messages are removed before rendering. If there are no active
/// messages, nothing is rendered and `self` is returned unchanged.
pub fn toast(&mut self, state: &mut ToastState) -> &mut Self {
state.cleanup(self.tick);
if state.messages.is_empty() {
return self;
}
self.skip_interaction_slot();
self.commands
.push(Command::BeginContainer(Box::new(BeginContainerArgs {
direction: Direction::Column,
gap: 0,
align: Align::Start,
align_self: None,
justify: Justify::Start,
border: None,
border_sides: BorderSides::all(),
border_style: Style::new().fg(self.theme.border),
bg_color: None,
padding: Padding::default(),
margin: Margin::default(),
constraints: Constraints::default(),
title: None,
grow: 0,
group_name: None,
})));
for message in state.messages.iter().rev() {
let color = match message.level {
ToastLevel::Info => self.theme.primary,
ToastLevel::Success => self.theme.success,
ToastLevel::Warning => self.theme.warning,
ToastLevel::Error => self.theme.error,
};
let mut line = String::with_capacity(4 + message.text.len());
line.push_str(" ● ");
line.push_str(&message.text);
self.styled(line, Style::new().fg(color));
}
self.commands.push(Command::EndContainer);
self.rollback.last_text_idx = None;
self
}
/// Horizontal slider for numeric values.
///
/// Step defaults to `span / 20.0`. Use [`Context::slider_with_step`] for an
/// explicit step (e.g. integer volume controls).
///
/// # Examples
/// ```
/// # use slt::*;
/// # TestBackend::new(80, 24).render(|ui| {
/// let mut volume = 75.0_f64;
/// let r = ui.slider("Volume", &mut volume, 0.0..=100.0);
/// if r.changed { /* volume was adjusted */ }
/// # });
/// ```
pub fn slider(
&mut self,
label: &str,
value: &mut f64,
range: std::ops::RangeInclusive<f64>,
) -> Response {
let span = (*range.end() - *range.start()).max(0.0);
let step = if span > 0.0 { span / 20.0 } else { 0.0 };
self.slider_inner(label, value, range, step)
}
/// Horizontal slider with an explicit step size.
///
/// Each Left/Right (or `h`/`l`) advances `value` by `step`. Use this when
/// the default step (`span / 20`) is too coarse or too fine — for example
/// integer counters need `step = 1.0`, fine controls need `step = 0.1`.
///
/// # Examples
/// ```
/// # use slt::*;
/// # TestBackend::new(80, 24).render(|ui| {
/// let mut volume = 50.0_f64;
/// ui.slider_with_step("Volume", &mut volume, 0.0..=100.0, 1.0);
/// # });
/// ```
pub fn slider_with_step(
&mut self,
label: &str,
value: &mut f64,
range: std::ops::RangeInclusive<f64>,
step: f64,
) -> Response {
self.slider_inner(label, value, range, step.max(0.0))
}
fn slider_inner(
&mut self,
label: &str,
value: &mut f64,
range: std::ops::RangeInclusive<f64>,
step: f64,
) -> Response {
let focused = self.register_focusable();
let mut changed = false;
let start = *range.start();
let end = *range.end();
let span = (end - start).max(0.0);
*value = (*value).clamp(start, end);
if focused {
let mut consumed_indices = Vec::new();
for (i, key) in self.available_key_presses() {
match key.code {
KeyCode::Left | KeyCode::Char('h') => {
if step > 0.0 {
let next = (*value - step).max(start);
if (next - *value).abs() > f64::EPSILON {
*value = next;
changed = true;
}
}
consumed_indices.push(i);
}
KeyCode::Right | KeyCode::Char('l') => {
if step > 0.0 {
let next = (*value + step).min(end);
if (next - *value).abs() > f64::EPSILON {
*value = next;
changed = true;
}
}
consumed_indices.push(i);
}
_ => {}
}
}
self.consume_indices(consumed_indices);
}
let ratio = if span <= f64::EPSILON {
0.0
} else {
((*value - start) / span).clamp(0.0, 1.0)
};
let value_text = format_compact_number(*value);
let label_width = UnicodeWidthStr::width(label) as u32;
let value_width = UnicodeWidthStr::width(value_text.as_str()) as u32;
let track_width = self
.area_width
.saturating_sub(label_width + value_width + 8)
.max(10) as usize;
let thumb_idx = if track_width <= 1 {
0
} else {
(ratio * (track_width as f64 - 1.0)).round() as usize
};
let mut track = String::with_capacity(track_width);
for i in 0..track_width {
if i == thumb_idx {
track.push('○');
} else if i < thumb_idx {
track.push('█');
} else {
track.push('━');
}
}
let text_color = self.theme.text;
let border_color = self.theme.border;
let primary_color = self.theme.primary;
let dim_color = self.theme.text_dim;
let mut response = self.container().row(|ui| {
ui.text(label).fg(text_color);
ui.text("[").fg(border_color);
ui.text(track).grow(1).fg(primary_color);
ui.text("]").fg(border_color);
if focused {
ui.text(value_text.as_str()).bold().fg(primary_color);
} else {
ui.text(value_text.as_str()).fg(dim_color);
}
});
response.focused = focused;
response.changed = changed;
response
}
}