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Merge pull request #6 from maor1993/master

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added support for double click reset to a known value
This commit is contained in:
Daniel Dada
2026-01-12 09:09:02 +03:00
committed by GitHub
parent a70b57e62b 4e8975c955
commit 750d8afb25
3 changed files with 15 additions and 3 deletions
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3
examples/example_knob.rs
View File

@@ -87,7 +87,8 @@ impl eframe::App for KnobDemo {
.with_background_arc(self.show_bg_arc) .with_background_arc(self.show_bg_arc)
.with_show_filled_segments(self.show_filled) .with_show_filled_segments(self.show_filled)
.with_colors(self.knob_color, self.line_color, self.text_color) .with_colors(self.knob_color, self.line_color, self.text_color)
.with_step(self.use_step.then_some(0.02)); .with_step(self.use_step.then_some(0.02))
.with_double_click_reset(0.5);
if *label == "Wiper, Sweep" { if *label == "Wiper, Sweep" {
knob = knob.with_sweep_range(0.25, 0.75).with_size(50.0); knob = knob.with_sweep_range(0.25, 0.75).with_size(50.0);

2
src/config.rs
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@@ -16,6 +16,7 @@ pub struct KnobConfig {
pub(crate) show_filled_segments: bool, pub(crate) show_filled_segments: bool,
pub(crate) min_angle: f32, pub(crate) min_angle: f32,
pub(crate) max_angle: f32, pub(crate) max_angle: f32,
pub(crate) reset_value: Option<f32>,
} }
impl KnobConfig { impl KnobConfig {
@@ -36,6 +37,7 @@ impl KnobConfig {
drag_sensitivity: 0.005, drag_sensitivity: 0.005,
show_background_arc: true, show_background_arc: true,
show_filled_segments: true, show_filled_segments: true,
reset_value: None,
} }
} }
} }

13
src/widget.rs
View File

@@ -53,7 +53,7 @@ impl<'a> Knob<'a> {
return self; return self;
} }
self.config.min_angle = self.config.min_angle =
start_angle_normalized.rem_euclid(1.0) * std::f32::consts::TAU + std::f32::consts::PI / 2.0; start_angle_normalized.rem_euclid(1.0) * std::f32::consts::TAU + std::f32::consts::PI / 2.0;
self.config.max_angle = self.config.min_angle + range.max(0.0) * std::f32::consts::TAU; self.config.max_angle = self.config.min_angle + range.max(0.0) * std::f32::consts::TAU;
self self
@@ -156,6 +156,11 @@ impl<'a> Knob<'a> {
self self
} }
/// Sets a reset value to return to on doubleclick event.
pub fn with_double_click_reset(mut self, reset_value: f32) -> Self {
self.config.reset_value = Some(reset_value);
self
}
} }
impl Widget for Knob<'_> { impl Widget for Knob<'_> {
@@ -168,7 +173,7 @@ impl Widget for Knob<'_> {
let renderer = KnobRenderer::new(&self.config, current_value, self.min, self.max); let renderer = KnobRenderer::new(&self.config, current_value, self.min, self.max);
let adjusted_size = renderer.calculate_size(ui); let adjusted_size = renderer.calculate_size(ui);
let (rect, response) = ui.allocate_exact_size(adjusted_size, Sense::drag()); let (rect, response) = ui.allocate_exact_size(adjusted_size, Sense::click_and_drag());
let mut response = response; let mut response = response;
if response.dragged() { if response.dragged() {
@@ -189,6 +194,10 @@ impl Widget for Knob<'_> {
} }
response.mark_changed(); response.mark_changed();
} else if response.double_clicked() {
if let Some(reset_value) = self.config.reset_value {
*self.value = reset_value
}
} }
let knob_rect = renderer.calculate_knob_rect(rect); let knob_rect = renderer.calculate_knob_rect(rect);