skyler
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egui
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egui/crates/egui
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lucasmerlin 89b6055f9c
Add `Ui::with_visual_transform` (#5055) 
* [X] I have followed the instructions in the PR template

This allows you to transform widgets without having to put them on a new
layer.
Example usage: 


https://github.com/user-attachments/assets/6b547782-f15e-42ce-835f-e8febe8d2d65

```rust
use eframe::egui;
use eframe::egui::{Button, Frame, InnerResponse, Label, Pos2, RichText, UiBuilder, Widget};
use eframe::emath::TSTransform;
use eframe::NativeOptions;
use egui::{CentralPanel, Sense, WidgetInfo};

pub fn main() -> eframe::Result {
    eframe::run_simple_native("focus test", NativeOptions::default(), |ctx, _frame| {
        CentralPanel::default().show(ctx, |ui| {
            let response = ui.ctx().read_response(ui.next_auto_id());

            let pressed = response
                .as_ref()
                .is_some_and(|r| r.is_pointer_button_down_on());

            let hovered = response.as_ref().is_some_and(|r| r.hovered());

            let target_scale = match (pressed, hovered) {
                (true, _) => 0.94,
                (_, true) => 1.06,
                _ => 1.0,
            };

            let scale = ui
                .ctx()
                .animate_value_with_time(ui.id().with("Down"), target_scale, 0.1);

            let mut center = response
                .as_ref()
                .map(|r| r.rect.center())
                .unwrap_or_else(|| Pos2::new(0.0, 0.0));
            if center.any_nan() {
                center = Pos2::new(0.0, 0.0);
            }

            let transform = TSTransform::from_translation(center.to_vec2())
                * TSTransform::from_scaling(scale)
                * TSTransform::from_translation(-center.to_vec2());

            ui.with_visual_transform(transform, |ui| {
                Button::new(RichText::new("Yaaaay").size(20.0))
                    .sense(Sense::click())
                    .ui(ui)
            });
        });
    })
}

```
 		2024-09-10 11:04:13 +02:00
..
assets Improved texture loading (#3315) 2023-09-12 10:39:17 +02:00
examples Fix broken GitHub source links due to #1940 2022-08-20 15:18:02 +02:00
src Add `Ui::with_visual_transform` (#5055) 2024-09-10 11:04:13 +02:00
tests Upgrade winit to 0.30.2 (#4849) 2024-07-31 09:43:16 +02:00
Cargo.toml Enable rustdoc `generate-link-to-definition` feature on docs.rs (#5030) 2024-08-30 11:22:29 +02:00
README.md Move all crates into a `crates` directory (#1940) 2022-08-20 10:41:49 +02:00

README.md

GUI implementation

This is the core library crate egui. It is fully platform independent without any backend. You give the egui library input each frame (mouse pos etc), and it outputs a triangle mesh for you to paint.