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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| use iced_core::{mouse::ScrollDelta, Widget}; | ||
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| use crate::iced_utils::iced_state::Element; | ||
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| pub struct ScrollListener<'a, M> { | ||
| content: Element<'a, M>, | ||
| on_scroll: Box<dyn Fn(f32) -> M>, | ||
| } | ||
|
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| impl<'a, M> ScrollListener<'a, M> { | ||
| pub fn new(content: impl Into<Element<'a, M>>, on_scroll: impl Fn(f32) -> M + 'static) -> Self { | ||
| Self { | ||
| content: content.into(), | ||
| on_scroll: Box::new(on_scroll), | ||
| } | ||
| } | ||
| } | ||
|
|
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| impl<'a, M> Widget<M, super::Renderer> for ScrollListener<'a, M> { | ||
| fn width(&self) -> iced_core::Length { | ||
| self.content.as_widget().width() | ||
| } | ||
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| fn height(&self) -> iced_core::Length { | ||
| self.content.as_widget().height() | ||
| } | ||
|
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| fn layout( | ||
| &self, | ||
| tree: &mut iced_core::widget::Tree, | ||
| renderer: &super::Renderer, | ||
| limits: &iced_core::layout::Limits, | ||
| ) -> iced_core::layout::Node { | ||
| self.content.as_widget().layout(tree, renderer, limits) | ||
| } | ||
|
|
||
| fn draw( | ||
| &self, | ||
| tree: &iced_core::widget::Tree, | ||
| renderer: &mut super::Renderer, | ||
| theme: &<super::Renderer as iced_core::Renderer>::Theme, | ||
| style: &iced_core::renderer::Style, | ||
| layout: iced_core::Layout<'_>, | ||
| cursor: iced_core::mouse::Cursor, | ||
| viewport: &iced_core::Rectangle, | ||
| ) { | ||
| self.content | ||
| .as_widget() | ||
| .draw(tree, renderer, theme, style, layout, cursor, viewport) | ||
| } | ||
|
|
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| fn tag(&self) -> iced_core::widget::tree::Tag { | ||
| self.content.as_widget().tag() | ||
| } | ||
|
|
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| fn state(&self) -> iced_core::widget::tree::State { | ||
| self.content.as_widget().state() | ||
| } | ||
|
|
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| fn children(&self) -> Vec<iced_core::widget::Tree> { | ||
| self.content.as_widget().children() | ||
| } | ||
|
|
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| fn diff(&self, tree: &mut iced_core::widget::Tree) { | ||
| self.content.as_widget().diff(tree) | ||
| } | ||
|
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| fn operate( | ||
| &self, | ||
| state: &mut iced_core::widget::Tree, | ||
| layout: iced_core::Layout<'_>, | ||
| renderer: &super::Renderer, | ||
| operation: &mut dyn iced_core::widget::Operation<M>, | ||
| ) { | ||
| self.content | ||
| .as_widget() | ||
| .operate(state, layout, renderer, operation) | ||
| } | ||
|
|
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| fn on_event( | ||
| &mut self, | ||
| state: &mut iced_core::widget::Tree, | ||
| event: iced_core::Event, | ||
| layout: iced_core::Layout<'_>, | ||
| cursor: iced_core::mouse::Cursor, | ||
| renderer: &super::Renderer, | ||
| clipboard: &mut dyn iced_core::Clipboard, | ||
| shell: &mut iced_core::Shell<'_, M>, | ||
| viewport: &iced_core::Rectangle, | ||
| ) -> iced_core::event::Status { | ||
| if let iced_core::event::Status::Captured = self.content.as_widget_mut().on_event( | ||
| state, | ||
| event.clone(), | ||
| layout, | ||
| cursor, | ||
| renderer, | ||
| clipboard, | ||
| shell, | ||
| viewport, | ||
| ) { | ||
| return iced_core::event::Status::Captured; | ||
| } | ||
|
|
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| if let iced_core::Event::Mouse(iced_core::mouse::Event::WheelScrolled { delta }) = event { | ||
| let bounds = layout.bounds(); | ||
|
|
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| if cursor.is_over(bounds) { | ||
| let (ScrollDelta::Lines { y, .. } | ScrollDelta::Pixels { y, .. }) = delta; | ||
|
|
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| if y.abs() != 0.0 { | ||
| let msg = (self.on_scroll)(y); | ||
| shell.publish(msg); | ||
| return iced_core::event::Status::Captured; | ||
| } | ||
| } | ||
| } | ||
|
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| iced_core::event::Status::Ignored | ||
| } | ||
|
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| fn mouse_interaction( | ||
| &self, | ||
| state: &iced_core::widget::Tree, | ||
| layout: iced_core::Layout<'_>, | ||
| cursor: iced_core::mouse::Cursor, | ||
| viewport: &iced_core::Rectangle, | ||
| renderer: &super::Renderer, | ||
| ) -> iced_core::mouse::Interaction { | ||
| self.content | ||
| .as_widget() | ||
| .mouse_interaction(state, layout, cursor, viewport, renderer) | ||
| } | ||
|
|
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| fn overlay<'b>( | ||
| &'b mut self, | ||
| state: &'b mut iced_core::widget::Tree, | ||
| layout: iced_core::Layout<'_>, | ||
| renderer: &super::Renderer, | ||
| ) -> Option<iced_core::overlay::Element<'b, M, super::Renderer>> { | ||
| self.content | ||
| .as_widget_mut() | ||
| .overlay(state, layout, renderer) | ||
| } | ||
| } | ||
|
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| impl<'a, M: 'a> From<ScrollListener<'a, M>> for Element<'a, M> { | ||
| fn from(value: ScrollListener<'a, M>) -> Self { | ||
| Self::new(value) | ||
| } | ||
| } |