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Add slider::Scale trait and implementations #3370

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d0260ac
Add `slider::Scale` trait and implementations
edwloef Jun 19, 2026
221b1ee
Fix `Scale::snap` for ranges with non-zero start
airstrike Jun 19, 2026
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5 changes: 3 additions & 2 deletions examples/color_palette/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@ use iced::alignment;
use iced::mouse;
use iced::theme;
use iced::widget::canvas::{self, Canvas, Frame, Geometry, Path};
use iced::widget::{Slider, column, row, text};
use iced::widget::{Slider, column, row, slider, text};
use iced::{Center, Color, Element, Fill, Font, Pixels, Point, Rectangle, Renderer, Size, Vector};

use palette::{Darken, Hsl, Lighten, ShiftHue, convert::FromColor, rgb::Rgb};
Expand Down Expand Up @@ -304,7 +304,8 @@ impl<C: ColorSpace + Copy> ColorPicker<C> {
component: f32,
update: impl Fn(f32) -> C + 'a,
) -> Slider<'a, f64, C> {
Slider::new(range, f64::from(component), move |v| update(v as f32)).step(0.01)
Slider::new(range, f64::from(component), move |v| update(v as f32))
.scale(slider::continuous())
}

row![
Expand Down
21 changes: 13 additions & 8 deletions examples/custom_quad/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -97,15 +97,20 @@ impl Example {
self.snap,
),
text!("Radius: {top_left:.2}/{top_right:.2}/{bottom_right:.2}/{bottom_left:.2}"),
slider(1.0..=200.0, top_left, Message::RadiusTopLeftChanged).step(0.01),
slider(1.0..=200.0, top_right, Message::RadiusTopRightChanged).step(0.01),
slider(1.0..=200.0, bottom_right, Message::RadiusBottomRightChanged).step(0.01),
slider(1.0..=200.0, bottom_left, Message::RadiusBottomLeftChanged).step(0.01),
slider(0.0..=10.0, self.border_width, Message::BorderWidthChanged).step(0.01),
slider(1.0..=200.0, top_left, Message::RadiusTopLeftChanged)
.scale(slider::discrete(0.01)),
slider(1.0..=200.0, top_right, Message::RadiusTopRightChanged)
.scale(slider::discrete(0.01)),
slider(1.0..=200.0, bottom_right, Message::RadiusBottomRightChanged)
.scale(slider::discrete(0.01)),
slider(1.0..=200.0, bottom_left, Message::RadiusBottomLeftChanged)
.scale(slider::discrete(0.01)),
slider(0.0..=10.0, self.border_width, Message::BorderWidthChanged)
.scale(slider::discrete(0.01)),
text!("Shadow: {sx:.2}x{sy:.2}, {sr:.2}"),
slider(-100.0..=100.0, sx, Message::ShadowXOffsetChanged).step(0.01),
slider(-100.0..=100.0, sy, Message::ShadowYOffsetChanged).step(0.01),
slider(0.0..=100.0, sr, Message::ShadowBlurRadiusChanged).step(0.01),
slider(-100.0..=100.0, sx, Message::ShadowXOffsetChanged).scale(slider::discrete(0.01)),
slider(-100.0..=100.0, sy, Message::ShadowYOffsetChanged).scale(slider::discrete(0.01)),
slider(0.0..=100.0, sr, Message::ShadowBlurRadiusChanged).scale(slider::discrete(0.01)),
toggler(self.snap)
.label("Snap to pixel grid")
.on_toggle(Message::SnapToggled),
Expand Down
8 changes: 4 additions & 4 deletions examples/custom_shader/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -70,7 +70,7 @@ impl IcedCubes {
control(
"Size",
slider(0.1..=0.25, self.scene.size, Message::CubeSizeChanged)
.step(0.01)
.scale(slider::continuous())
.width(100),
),
checkbox(self.scene.show_depth_buffer)
Expand All @@ -88,7 +88,7 @@ impl IcedCubes {
..self.scene.light_color
})
})
.step(0.01)
.scale(slider::continuous())
.width(100)
),
control(
Expand All @@ -99,7 +99,7 @@ impl IcedCubes {
..self.scene.light_color
})
})
.step(0.01)
.scale(slider::continuous())
.width(100)
),
control(
Expand All @@ -110,7 +110,7 @@ impl IcedCubes {
..self.scene.light_color
})
})
.step(0.01)
.scale(slider::continuous())
.width(100)
)
]
Expand Down
2 changes: 1 addition & 1 deletion examples/custom_widget/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -106,7 +106,7 @@ impl Example {
let content = column![
circle(self.radius),
text!("Radius: {:.2}", self.radius),
slider(1.0..=100.0, self.radius, Message::RadiusChanged).step(0.01),
slider(1.0..=100.0, self.radius, Message::RadiusChanged).scale(slider::discrete(0.01)),
]
.padding(20)
.spacing(20)
Expand Down
3 changes: 2 additions & 1 deletion examples/ferris/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -135,7 +135,8 @@ impl Image {
format!("Width: {}px", self.width)
),
with_value(
slider(0.0..=1.0, self.opacity, Message::OpacityChanged).step(0.01),
slider(0.0..=1.0, self.opacity, Message::OpacityChanged)
.scale(slider::discrete(0.01)),
format!("Opacity: {:.2}", self.opacity)
),
with_value(
Expand Down
10 changes: 5 additions & 5 deletions examples/gradient/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -70,7 +70,7 @@ impl Gradient {

let angle_picker = row![
text("Angle").width(64),
slider(Radians::RANGE, self.angle, Message::AngleChanged).step(0.01)
slider(Radians::RANGE, self.angle, Message::AngleChanged).scale(slider::continuous())
]
.spacing(8)
.padding(8)
Expand Down Expand Up @@ -114,10 +114,10 @@ impl Default for Gradient {
fn color_picker(label: &str, color: Color) -> Element<'_, Color> {
row![
text(label).width(64),
slider(0.0..=1.0, color.r, move |r| { Color { r, ..color } }).step(0.01),
slider(0.0..=1.0, color.g, move |g| { Color { g, ..color } }).step(0.01),
slider(0.0..=1.0, color.b, move |b| { Color { b, ..color } }).step(0.01),
slider(0.0..=1.0, color.a, move |a| { Color { a, ..color } }).step(0.01),
slider(0.0..=1.0, color.r, move |r| { Color { r, ..color } }).scale(slider::continuous()),
slider(0.0..=1.0, color.g, move |g| { Color { g, ..color } }).scale(slider::continuous()),
slider(0.0..=1.0, color.b, move |b| { Color { b, ..color } }).scale(slider::continuous()),
slider(0.0..=1.0, color.a, move |a| { Color { a, ..color } }).scale(slider::continuous()),
]
.spacing(8)
.padding(8)
Expand Down
6 changes: 3 additions & 3 deletions examples/integration/src/controls.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -48,21 +48,21 @@ impl Controls {
..background_color
})
})
.step(0.01),
.scale(slider::continuous()),
slider(0.0..=1.0, background_color.g, move |g| {
Message::BackgroundColorChanged(Color {
g,
..background_color
})
})
.step(0.01),
.scale(slider::continuous()),
slider(0.0..=1.0, background_color.b, move |b| {
Message::BackgroundColorChanged(Color {
b,
..background_color
})
})
.step(0.01),
.scale(slider::continuous()),
]
.width(500)
.spacing(20);
Expand Down
6 changes: 4 additions & 2 deletions examples/progress_bar/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -46,15 +46,17 @@ impl Progress {
center(
row![
bar,
vertical_slider(0.0..=100.0, self.value, Message::SliderChanged).step(0.01),
vertical_slider(0.0..=100.0, self.value, Message::SliderChanged)
.scale(slider::continuous()),
]
.spacing(20),
)
} else {
center(
column![
bar,
slider(0.0..=100.0, self.value, Message::SliderChanged).step(0.01)
slider(0.0..=100.0, self.value, Message::SliderChanged)
.scale(slider::discrete(0.01))
]
.spacing(20),
)
Expand Down
4 changes: 2 additions & 2 deletions examples/slider/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -31,14 +31,14 @@ impl Slider {
let h_slider = container(
slider(1..=100, self.value, Message::SliderChanged)
.default(50)
.shift_step(5),
.scale(slider::discrete(1).shift_step(5)),
)
.width(250);

let v_slider = container(
vertical_slider(1..=100, self.value, Message::SliderChanged)
.default(50)
.shift_step(5),
.scale(slider::discrete(1).shift_step(5)),
)
.height(200);

Expand Down
2 changes: 1 addition & 1 deletion examples/toast/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -129,7 +129,7 @@ impl App {
"Timeout",
row![
text!("{:0>2} sec", self.timeout_secs),
slider(1.0..=30.0, self.timeout_secs as f64, Message::Timeout).step(1.0)
slider(1.0..=30.0, self.timeout_secs as f64, Message::Timeout)
]
.spacing(5)
.into()
Expand Down
1 change: 0 additions & 1 deletion examples/tour/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -564,7 +564,6 @@ fn color_slider<'a>(
slider(0.0..=1.0, f64::from(component), move |c| {
Message::TextColorChanged(update(c as f32))
})
.step(0.01)
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
Expand Down
2 changes: 1 addition & 1 deletion examples/vectorial_text/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,7 @@ impl VectorialText {
let slider_with_label = |label, range, value, message: fn(f32) -> _| {
column![
row![text(label), space::horizontal(), text!("{:.2}", value)],
slider(range, value, message).step(0.01)
slider(range, value, message).scale(slider::discrete(0.01))
]
.spacing(2)
};
Expand Down
2 changes: 1 addition & 1 deletion tester/src/lib.rs
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Expand Up @@ -845,7 +845,7 @@ where
stack![
container(
slider(range, current, on_change)
.step(10.0)
.scale(slider::discrete(10))
.width(Fill)
.height(24)
.style(|theme: &core::Theme, status| {
Expand Down
4 changes: 2 additions & 2 deletions widget/src/helpers.rs
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Expand Up @@ -1489,7 +1489,7 @@ pub fn slider<'a, T, Message, Theme>(
on_change: impl Fn(T) -> Message + 'a,
) -> Slider<'a, T, Message, Theme>
where
T: Copy + From<u8> + std::cmp::PartialOrd,
T: Copy + std::cmp::PartialOrd + num_traits::AsPrimitive<f64> + num_traits::FromPrimitive,
Message: Clone,
Theme: slider::Catalog + 'a,
{
Expand Down Expand Up @@ -1534,7 +1534,7 @@ pub fn vertical_slider<'a, T, Message, Theme>(
on_change: impl Fn(T) -> Message + 'a,
) -> VerticalSlider<'a, T, Message, Theme>
where
T: Copy + From<u8> + std::cmp::PartialOrd,
T: Copy + std::cmp::PartialOrd + num_traits::AsPrimitive<f64> + num_traits::FromPrimitive,
Message: Clone,
Theme: vertical_slider::Catalog + 'a,
{
Expand Down
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