87 lines
2.6 KiB
Rust
87 lines
2.6 KiB
Rust
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use core::{cell::Cell, ops::{Deref, DerefMut}};
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use alloc::rc::{Rc, Weak};
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use slint::{PhysicalSize, Window, WindowSize, platform::{Renderer, WindowAdapter, WindowEvent, software_renderer::{RepaintBufferType, SoftwareRenderer}}};
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/// This is a minimal adapter for a Window that doesn't have any other feature than rendering
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/// using the software renderer.
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pub struct SoftwareWindowAdapter {
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pub window: Window,
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pub renderer: SoftwareRenderer,
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needs_redraw: Cell<bool>,
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size: Cell<PhysicalSize>,
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}
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impl SoftwareWindowAdapter {
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/// Instantiate a new MinimalWindowAdaptor
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///
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/// The `repaint_buffer_type` parameter specify what kind of buffer are passed to the [`SoftwareRenderer`]
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pub fn new(renderer: SoftwareRenderer) -> Rc<Self> {
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Rc::new_cyclic(|w: &Weak<Self>| Self {
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window: Window::new(w.clone()),
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renderer,
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needs_redraw: Cell::new(true),
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size: Default::default(),
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})
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}
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/// If the window needs to be redrawn, the callback will be called with the
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/// [renderer](SoftwareRenderer) that should be used to do the drawing.
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///
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/// [`SoftwareRenderer::render()`] or [`SoftwareRenderer::render_by_line()`] should be called
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/// in that callback.
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///
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/// Return true if something was redrawn.
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pub fn draw_if_needed(&self, render_callback: impl FnOnce(&SoftwareRenderer)) -> bool {
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if self.needs_redraw.replace(false) /*|| self.renderer.rendering_metrics_collector.is_some()*/ {
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render_callback(&self.renderer);
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true
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} else {
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false
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}
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}
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pub fn set_scale_factor(&self, scale_factor: f32) {
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self.window.dispatch_event(WindowEvent::ScaleFactorChanged { scale_factor });
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}
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}
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impl WindowAdapter for SoftwareWindowAdapter {
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fn window(&self) -> &Window {
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&self.window
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}
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fn renderer(&self) -> &dyn Renderer {
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&self.renderer
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}
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fn size(&self) -> PhysicalSize {
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self.size.get()
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}
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fn set_size(&self, size: WindowSize) {
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let sf = self.window.scale_factor();
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self.size.set(size.to_physical(sf));
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self.window
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.dispatch_event(WindowEvent::Resized { size: size.to_logical(sf) })
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}
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fn request_redraw(&self) {
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self.needs_redraw.set(true);
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}
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}
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impl Deref for SoftwareWindowAdapter {
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type Target = Window;
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fn deref(&self) -> &Self::Target {
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&self.window
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}
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}
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impl DerefMut for SoftwareWindowAdapter {
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fn deref_mut(&mut self) -> &mut Self::Target {
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&mut self.window
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}
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}
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