updated cargo.lock

Support for using mouse scroll wheel to change values

.github/workflows/publish.yml

@@ -0,0 +1,27 @@
+name: Publish to crates.io
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+      
+      - name: Check if version matches tag
+        run: |
+          TAG=${GITHUB_REF#refs/tags/v}
+          CARGO_VERSION=$(grep '^version' Cargo.toml | head -1 | cut -d'"' -f2)
+          if [ "$TAG" != "$CARGO_VERSION" ]; then
+            echo "Tag version ($TAG) doesn't match Cargo.toml version ($CARGO_VERSION)"
+            exit 1
+          fi
+      
+      - name: Publish to crates.io
+        run: cargo publish --token ${{ secrets.CARGO_REGISTRY_TOKEN }}

CHANGELOG.md

@@ -2,6 +2,18 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.3.9] - 2026-01-13
+
+### 🚀 Features
+
+- added support for using mouse scroll wheel to change values ([#PR7](https://github.com/obsqrbtz/egui_knob/pull/7) by [maor1993](https://github.com/maor1993))
+
+## [0.3.8] - 2026-01-12
+
+### 🚀 Features
+
+- added `with_double_click_reset` option ([#PR6](https://github.com/obsqrbtz/egui_knob/pull/6) by [maor1993](https://github.com/maor1993))
+
 ## [0.3.7] - 2026-01-06
 
 ### 🛠 Maintenance

Cargo.lock

@@ -869,7 +869,7 @@ dependencies = [
 
 [[package]]
 name = "egui_knob"
-version = "0.3.7"
+version = "0.3.9"
 dependencies = [
  "eframe",
  "egui",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "egui_knob"
-version = "0.3.7"
+version = "0.3.9"
 edition = "2024"
 authors = ["Daniel Dada"]
 description = "A simple knob widget for egui"

README.md

@@ -27,7 +27,7 @@ To use the Knob widget in your project, add the following to your `Cargo.toml`:
 [dependencies]
 egui = "0.33"
 eframe = "0.33"
-egui_knob = "0.3.6"
+egui_knob = "0.3.9"
 ```
 
 ## Usage

examples/example_knob.rs

@@ -87,7 +87,9 @@ impl eframe::App for KnobDemo {
                                 .with_background_arc(self.show_bg_arc)
                                 .with_show_filled_segments(self.show_filled)
                                 .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)
+                                .with_middle_scroll();
 
                             if *label == "Wiper, Sweep" {
                                 knob = knob.with_sweep_range(0.25, 0.75).with_size(50.0);

src/config.rs

@@ -16,6 +16,8 @@ pub struct KnobConfig {
     pub(crate) show_filled_segments: bool,
     pub(crate) min_angle: f32,
     pub(crate) max_angle: f32,
+    pub(crate) reset_value: Option<f32>,
+    pub(crate) allow_scroll: bool,
 }
 
 impl KnobConfig {
@@ -36,6 +38,8 @@ impl KnobConfig {
             drag_sensitivity: 0.005,
             show_background_arc: true,
             show_filled_segments: true,
+            reset_value: None,
+            allow_scroll:false
         }
     }
 }

src/widget.rs

@@ -156,6 +156,18 @@ impl<'a> Knob<'a> {
         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
+    }
+
+    /// Allows user to use scroll wheel to change knob value
+    /// Uses config.step for the increment value
+    pub fn with_middle_scroll(mut self) -> Self {
+        self.config.allow_scroll = true;
+        self
+    }
 }
 
 impl Widget for Knob<'_> {
@@ -168,7 +180,7 @@ impl Widget for Knob<'_> {
         let renderer = KnobRenderer::new(&self.config, current_value, self.min, self.max);
         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;
         if response.dragged() {
@@ -189,6 +201,21 @@ impl Widget for Knob<'_> {
             }
 
             response.mark_changed();
+        } else if response.double_clicked() {
+            if let Some(reset_value) = self.config.reset_value {
+                *self.value = reset_value
+            }
+        } else if response.hovered() & self.config.allow_scroll {
+            if let Some(scoll) = ui.input(|input| {
+                input.events.iter().find_map(|e| match e {
+                    egui::Event::MouseWheel { delta, .. } => Some(*delta),
+                    _ => None,
+                })
+            }) {
+                *self.value = (*self.value
+                    + scoll.y * self.config.step.unwrap_or(self.config.drag_sensitivity))
+                .clamp(self.min, self.max);
+            }
         }
 
         let knob_rect = renderer.calculate_knob_rect(rect);