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author | 2022-07-27 06:49:20 +0200 | |
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committer | 2022-07-27 06:49:20 +0200 | |
commit | ff2519b1d43d481987351a83b6dd7237524c21f0 (patch) | |
tree | 5731eeb7eb1247d4a8951de0d5bc5d8102640559 /graphics/src/widget/pure/canvas/program.rs | |
parent | c44267b85f7aaa2997e3caf1323b837d95818c22 (diff) | |
download | iced-ff2519b1d43d481987351a83b6dd7237524c21f0.tar.gz iced-ff2519b1d43d481987351a83b6dd7237524c21f0.tar.bz2 iced-ff2519b1d43d481987351a83b6dd7237524c21f0.zip |
Replace stateful widgets with new `iced_pure` API
Diffstat (limited to 'graphics/src/widget/pure/canvas/program.rs')
-rw-r--r-- | graphics/src/widget/pure/canvas/program.rs | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/graphics/src/widget/pure/canvas/program.rs b/graphics/src/widget/pure/canvas/program.rs deleted file mode 100644 index 20c6406e..00000000 --- a/graphics/src/widget/pure/canvas/program.rs +++ /dev/null @@ -1,102 +0,0 @@ -use crate::widget::pure::canvas::event::{self, Event}; -use crate::widget::pure::canvas::mouse; -use crate::widget::pure::canvas::{Cursor, Geometry}; -use crate::Rectangle; - -/// The state and logic of a [`Canvas`]. -/// -/// A [`Program`] can mutate internal state and produce messages for an -/// application. -/// -/// [`Canvas`]: crate::widget::Canvas -pub trait Program<Message, Theme = iced_native::Theme> { - /// The internal state mutated by the [`Program`]. - type State: Default + 'static; - - /// Updates the [`State`](Self::State) of the [`Program`]. - /// - /// When a [`Program`] is used in a [`Canvas`], the runtime will call this - /// method for each [`Event`]. - /// - /// This method can optionally return a `Message` to notify an application - /// of any meaningful interactions. - /// - /// By default, this method does and returns nothing. - /// - /// [`Canvas`]: crate::widget::Canvas - fn update( - &self, - _state: &mut Self::State, - _event: Event, - _bounds: Rectangle, - _cursor: Cursor, - ) -> (event::Status, Option<Message>) { - (event::Status::Ignored, None) - } - - /// Draws the state of the [`Program`], producing a bunch of [`Geometry`]. - /// - /// [`Geometry`] can be easily generated with a [`Frame`] or stored in a - /// [`Cache`]. - /// - /// [`Frame`]: crate::widget::canvas::Frame - /// [`Cache`]: crate::widget::canvas::Cache - fn draw( - &self, - state: &Self::State, - theme: &Theme, - bounds: Rectangle, - cursor: Cursor, - ) -> Vec<Geometry>; - - /// Returns the current mouse interaction of the [`Program`]. - /// - /// The interaction returned will be in effect even if the cursor position - /// is out of bounds of the program's [`Canvas`]. - /// - /// [`Canvas`]: crate::widget::Canvas - fn mouse_interaction( - &self, - _state: &Self::State, - _bounds: Rectangle, - _cursor: Cursor, - ) -> mouse::Interaction { - mouse::Interaction::default() - } -} - -impl<Message, Theme, T> Program<Message, Theme> for &T -where - T: Program<Message, Theme>, -{ - type State = T::State; - - fn update( - &self, - state: &mut Self::State, - event: Event, - bounds: Rectangle, - cursor: Cursor, - ) -> (event::Status, Option<Message>) { - T::update(self, state, event, bounds, cursor) - } - - fn draw( - &self, - state: &Self::State, - theme: &Theme, - bounds: Rectangle, - cursor: Cursor, - ) -> Vec<Geometry> { - T::draw(self, state, theme, bounds, cursor) - } - - fn mouse_interaction( - &self, - state: &Self::State, - bounds: Rectangle, - cursor: Cursor, - ) -> mouse::Interaction { - T::mouse_interaction(self, state, bounds, cursor) - } -} |