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Diffstat (limited to 'native/src/widget/mouse_area.rs')
| -rw-r--r-- | native/src/widget/mouse_area.rs | 311 |
1 files changed, 0 insertions, 311 deletions
diff --git a/native/src/widget/mouse_area.rs b/native/src/widget/mouse_area.rs deleted file mode 100644 index 69cfddbf..00000000 --- a/native/src/widget/mouse_area.rs +++ /dev/null @@ -1,311 +0,0 @@ -//! A container for capturing mouse events. - -use crate::event::{self, Event}; -use crate::layout; -use crate::mouse; -use crate::overlay; -use crate::renderer; -use crate::touch; -use crate::widget::{tree, Operation, Tree}; -use crate::{ - Clipboard, Element, Layout, Length, Point, Rectangle, Shell, Widget, -}; - -/// Emit messages on mouse events. -#[allow(missing_debug_implementations)] -pub struct MouseArea<'a, Message, Renderer> { - content: Element<'a, Message, Renderer>, - on_press: Option<Message>, - on_release: Option<Message>, - on_right_press: Option<Message>, - on_right_release: Option<Message>, - on_middle_press: Option<Message>, - on_middle_release: Option<Message>, -} - -impl<'a, Message, Renderer> MouseArea<'a, Message, Renderer> { - /// The message to emit on a left button press. - #[must_use] - pub fn on_press(mut self, message: Message) -> Self { - self.on_press = Some(message); - self - } - - /// The message to emit on a left button release. - #[must_use] - pub fn on_release(mut self, message: Message) -> Self { - self.on_release = Some(message); - self - } - - /// The message to emit on a right button press. - #[must_use] - pub fn on_right_press(mut self, message: Message) -> Self { - self.on_right_press = Some(message); - self - } - - /// The message to emit on a right button release. - #[must_use] - pub fn on_right_release(mut self, message: Message) -> Self { - self.on_right_release = Some(message); - self - } - - /// The message to emit on a middle button press. - #[must_use] - pub fn on_middle_press(mut self, message: Message) -> Self { - self.on_middle_press = Some(message); - self - } - - /// The message to emit on a middle button release. - #[must_use] - pub fn on_middle_release(mut self, message: Message) -> Self { - self.on_middle_release = Some(message); - self - } -} - -/// Local state of the [`MouseArea`]. -#[derive(Default)] -struct State { - // TODO: Support on_mouse_enter and on_mouse_exit -} - -impl<'a, Message, Renderer> MouseArea<'a, Message, Renderer> { - /// Creates a [`MouseArea`] with the given content. - pub fn new(content: impl Into<Element<'a, Message, Renderer>>) -> Self { - MouseArea { - content: content.into(), - on_press: None, - on_release: None, - on_right_press: None, - on_right_release: None, - on_middle_press: None, - on_middle_release: None, - } - } -} - -impl<'a, Message, Renderer> Widget<Message, Renderer> - for MouseArea<'a, Message, Renderer> -where - Renderer: crate::Renderer, - Message: Clone, -{ - fn tag(&self) -> tree::Tag { - tree::Tag::of::<State>() - } - - fn state(&self) -> tree::State { - tree::State::new(State::default()) - } - - fn children(&self) -> Vec<Tree> { - vec![Tree::new(&self.content)] - } - - fn diff(&self, tree: &mut Tree) { - tree.diff_children(std::slice::from_ref(&self.content)); - } - - fn width(&self) -> Length { - self.content.as_widget().width() - } - - fn height(&self) -> Length { - self.content.as_widget().height() - } - - fn layout( - &self, - renderer: &Renderer, - limits: &layout::Limits, - ) -> layout::Node { - self.content.as_widget().layout(renderer, limits) - } - - fn operate( - &self, - tree: &mut Tree, - layout: Layout<'_>, - renderer: &Renderer, - operation: &mut dyn Operation<Message>, - ) { - self.content.as_widget().operate( - &mut tree.children[0], - layout, - renderer, - operation, - ); - } - - fn on_event( - &mut self, - tree: &mut Tree, - event: Event, - layout: Layout<'_>, - cursor_position: Point, - renderer: &Renderer, - clipboard: &mut dyn Clipboard, - shell: &mut Shell<'_, Message>, - ) -> event::Status { - if let event::Status::Captured = self.content.as_widget_mut().on_event( - &mut tree.children[0], - event.clone(), - layout, - cursor_position, - renderer, - clipboard, - shell, - ) { - return event::Status::Captured; - } - - update(self, &event, layout, cursor_position, shell) - } - - fn mouse_interaction( - &self, - tree: &Tree, - layout: Layout<'_>, - cursor_position: Point, - viewport: &Rectangle, - renderer: &Renderer, - ) -> mouse::Interaction { - self.content.as_widget().mouse_interaction( - &tree.children[0], - layout, - cursor_position, - viewport, - renderer, - ) - } - - fn draw( - &self, - tree: &Tree, - renderer: &mut Renderer, - theme: &Renderer::Theme, - renderer_style: &renderer::Style, - layout: Layout<'_>, - cursor_position: Point, - viewport: &Rectangle, - ) { - self.content.as_widget().draw( - &tree.children[0], - renderer, - theme, - renderer_style, - layout, - cursor_position, - viewport, - ); - } - - fn overlay<'b>( - &'b mut self, - tree: &'b mut Tree, - layout: Layout<'_>, - renderer: &Renderer, - ) -> Option<overlay::Element<'b, Message, Renderer>> { - self.content.as_widget_mut().overlay( - &mut tree.children[0], - layout, - renderer, - ) - } -} - -impl<'a, Message, Renderer> From<MouseArea<'a, Message, Renderer>> - for Element<'a, Message, Renderer> -where - Message: 'a + Clone, - Renderer: 'a + crate::Renderer, -{ - fn from( - area: MouseArea<'a, Message, Renderer>, - ) -> Element<'a, Message, Renderer> { - Element::new(area) - } -} - -/// Processes the given [`Event`] and updates the [`State`] of an [`MouseArea`] -/// accordingly. -fn update<Message: Clone, Renderer>( - widget: &mut MouseArea<'_, Message, Renderer>, - event: &Event, - layout: Layout<'_>, - cursor_position: Point, - shell: &mut Shell<'_, Message>, -) -> event::Status { - if !layout.bounds().contains(cursor_position) { - return event::Status::Ignored; - } - - if let Some(message) = widget.on_press.as_ref() { - if let Event::Mouse(mouse::Event::ButtonPressed(mouse::Button::Left)) - | Event::Touch(touch::Event::FingerPressed { .. }) = event - { - shell.publish(message.clone()); - - return event::Status::Captured; - } - } - - if let Some(message) = widget.on_release.as_ref() { - if let Event::Mouse(mouse::Event::ButtonReleased(mouse::Button::Left)) - | Event::Touch(touch::Event::FingerLifted { .. }) = event - { - shell.publish(message.clone()); - - return event::Status::Captured; - } - } - - if let Some(message) = widget.on_right_press.as_ref() { - if let Event::Mouse(mouse::Event::ButtonPressed(mouse::Button::Right)) = - event - { - shell.publish(message.clone()); - - return event::Status::Captured; - } - } - - if let Some(message) = widget.on_right_release.as_ref() { - if let Event::Mouse(mouse::Event::ButtonReleased( - mouse::Button::Right, - )) = event - { - shell.publish(message.clone()); - - return event::Status::Captured; - } - } - - if let Some(message) = widget.on_middle_press.as_ref() { - if let Event::Mouse(mouse::Event::ButtonPressed( - mouse::Button::Middle, - )) = event - { - shell.publish(message.clone()); - - return event::Status::Captured; - } - } - - if let Some(message) = widget.on_middle_release.as_ref() { - if let Event::Mouse(mouse::Event::ButtonReleased( - mouse::Button::Middle, - )) = event - { - shell.publish(message.clone()); - - return event::Status::Captured; - } - } - - event::Status::Ignored -} |