diff options
| -rw-r--r-- | examples/integration/src/controls.rs | 2 | ||||
| -rw-r--r-- | native/src/widget/slider.rs | 25 |
2 files changed, 24 insertions, 3 deletions
diff --git a/examples/integration/src/controls.rs b/examples/integration/src/controls.rs index 81c35072..e6e74995 100644 --- a/examples/integration/src/controls.rs +++ b/examples/integration/src/controls.rs @@ -9,7 +9,7 @@ pub struct Controls { sliders: [slider::State; 3], } -#[derive(Debug)] +#[derive(Debug, Clone)] pub enum Message { BackgroundColorChanged(Color), } diff --git a/native/src/widget/slider.rs b/native/src/widget/slider.rs index 8cdfc3de..753a49fe 100644 --- a/native/src/widget/slider.rs +++ b/native/src/widget/slider.rs @@ -40,6 +40,7 @@ pub struct Slider<'a, Message, Renderer: self::Renderer> { range: RangeInclusive<f32>, value: f32, on_change: Box<dyn Fn(f32) -> Message>, + on_release: Option<Message>, width: Length, style: Renderer::Style, } @@ -71,11 +72,25 @@ impl<'a, Message, Renderer: self::Renderer> Slider<'a, Message, Renderer> { value: value.max(*range.start()).min(*range.end()), range, on_change: Box::new(on_change), + on_release: None, width: Length::Fill, style: Renderer::Style::default(), } } + /// Sets the release message of the [`Slider`]. + /// This is called when the mouse is released from the slider. + /// + /// Typically, the user's interaction with the slider is finished when this message is produced. + /// This is useful if you need to spawn a long-running task from the slider's result, where + /// the default on_change message could create too many events. + /// + /// [`Slider`]: struct.Slider.html + pub fn on_release(mut self, on_release: Message) -> Self { + self.on_release = Some(on_release); + self + } + /// Sets the width of the [`Slider`]. /// /// [`Slider`]: struct.Slider.html @@ -114,6 +129,7 @@ impl<'a, Message, Renderer> Widget<Message, Renderer> for Slider<'a, Message, Renderer> where Renderer: self::Renderer, + Message: Clone, { fn width(&self) -> Length { self.width @@ -171,7 +187,12 @@ where } } mouse::Event::ButtonReleased(mouse::Button::Left) => { - self.state.is_dragging = false; + if self.state.is_dragging { + if let Some(on_release) = self.on_release.clone() { + messages.push(on_release); + } + self.state.is_dragging = false; + } } mouse::Event::CursorMoved { .. } => { if self.state.is_dragging { @@ -252,7 +273,7 @@ impl<'a, Message, Renderer> From<Slider<'a, Message, Renderer>> for Element<'a, Message, Renderer> where Renderer: 'a + self::Renderer, - Message: 'a, + Message: 'a + Clone, { fn from( slider: Slider<'a, Message, Renderer>, |