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Replace eframe::Frame commands and WindowInfo with egui (#3564)

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* Part of https://github.com/emilk/egui/issues/3556

## In short
You now almost never need to use `eframe::Frame` - instead use
`ui.input(|i| i.viewport())` for information about the current viewport
(native window), and use `ctx.send_viewport_cmd` to modify it.

## In detail

This PR removes most commands from `eframe::Frame`, and replaces them
with `ViewportCommand`.
So `frame.close()` becomes
`ctx.send_viewport_cmd(ViewportCommand::Close)`, etc.

`frame.info().window_info` is now also gone, replaced with `ui.input(|i|
i.viewport())`.

`frame.info().native_pixels_per_point` is replaced with `ui.input(|i|
i.raw.native_pixels_per_point)`.

`RawInput` now contains one `ViewportInfo` for each viewport.

Screenshots are taken with
`ctx.send_viewport_cmd(ViewportCommand::Screenshots)` and are returned
in `egui::Event` which you can check with:

``` ust
ui.input(|i| {
    for event in &i.raw.events {
        if let egui::Event::Screenshot { viewport_id, image } = event {
            // handle it here
        }
    }
});
```

### Motivation
You no longer need to pass around the `&eframe::Frame` everywhere.
This also opens the door for other integrations to use the same API of
`ViewportCommand`s.
This commit is contained in:
Emil Ernerfeldt
2023-11-18 19:27:53 +01:00
committed by GitHub
parent 3e37e9dfc7
commit 1571027556
29 changed files with 905 additions and 915 deletions
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6
crates/egui_demo_lib/src/demo/mod.rs
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@@ -11,6 +11,7 @@ pub mod context_menu;
pub mod dancing_strings;
pub mod demo_app_windows;
pub mod drag_and_drop;
pub mod extra_viewport;
pub mod font_book;
pub mod highlighting;
pub mod layout_test;
@@ -46,6 +47,11 @@ pub trait View {
/// Something to view
pub trait Demo {
/// Is the demo enabled for this integraton?
fn is_enabled(&self, _ctx: &egui::Context) -> bool {
true
}
/// `&'static` so we can also use it as a key to store open/close state.
fn name(&self) -> &'static str;