0.30.0 - egui_kittest and modals

egui is an easy-to-use immediate mode GUI for Rust that runs on both web and native.

Try it now: https://www.egui.rs/

egui development is sponsored by Rerun, a startup building an SDK for visualizing streams of multimodal data.

egui_kittest

This release welcomes a new crate to the family: egui_kittest.
egui_kittest is a testing framework for egui, allowing you to test both automation (simulated clicks and other events),
and also do screenshot testing (useful for regression tests).
egui_kittest is built using kittest, which is a general GUI testing framework that aims to work with any Rust GUI (not just egui!).
kittest uses the accessibility library AccessKit for automatation and to query the widget tree.

kittest and egui_kittest are written by @lucasmerlin.

Here's a quick example of how to use egui_kittest to test a checkbox:

use egui::accesskit::Toggled;
use egui_kittest::{Harness, kittest::Queryable};

fn main() {
    let mut checked = false;
    let app = |ui: &mut egui::Ui| {
        ui.checkbox(&mut checked, "Check me!");
    };

    let mut harness = egui_kittest::Harness::new_ui(app);

    let checkbox = harness.get_by_label("Check me!");
    assert_eq!(checkbox.toggled(), Some(Toggled::False));
    checkbox.click();

    harness.run();

    let checkbox = harness.get_by_label("Check me!");
    assert_eq!(checkbox.toggled(), Some(Toggled::True));

    // You can even render the ui and do image snapshot tests
    #[cfg(all(feature = "wgpu", feature = "snapshot"))]
    harness.wgpu_snapshot("readme_example");
}

egui changelog

✨ Highlights

• Add Modal, a popup that blocks input to the rest of the application (#5358 by @lucasmerlin)
• Improved support for transform layers (#5465, #5468, #5429)

⭐ Added

• Add Modal and Memory::set_modal_layer #5358 by @lucasmerlin
• Add UiBuilder::layer_id and remove layer_id from Ui::new #5195 by @emilk
• Allow easier setting of background color for TextEdit #5203 by @bircni
• Set Response::intrinsic_size for TextEdit #5266 by @lucasmerlin
• Expose center position in MultiTouchInfo #5247 by @lucasmerlin
• Context::add_font #5228 by @frederik-uni
• Impl from Box<str> for WidgetText, RichText #5309 by @dimtpap
• Add Window::scroll_bar_visibility #5231 by @Zeenobit
• Add ComboBox::close_behavior #5305 by @avalsch
• Add painter.line() #5291 by @bircni
• Allow attaching custom user data to a screenshot command #5416 by @emilk
• Add Button::image_tint_follows_text_color #5430 by @emilk
• Consume escape keystroke when bailing out from a drag operation #5433 by @abey79
• Add Context::layer_transform_to_global & layer_transform_from_global #5465 by @emilk

🔧 Changed

• Update MSRV to Rust 1.80 #5421, #5457 by @emilk
• Expand max font atlas size from 8k to 16k #5257 by @rustbasic
• Put font data into Arc to reduce memory consumption #5276 by @StarStarJ
• Move egui::util::cache to egui::cache; add FramePublisher #5426 by @emilk
• Remove Order::PanelResizeLine #5455 by @emilk
• Drag-and-drop: keep cursor set by user, if any #5467 by @abey79
• Use profiling crate to support more profiler backends #5150 by @teddemunnik
• Improve hit-test of thin widgets, and widgets across layers #5468 by @emilk

🐛 Fixed

• Update ScrollArea drag velocity when drag stopped #5175 by @valadaptive
• Fix bug causing wrong-fire of ViewportCommand::Visible #5244 by @rustbasic
• Fix: Ui::new_child does not consider the sizing_pass field of UiBuilder #5262 by @zhatuokun
• Fix Ctrl+Shift+Z redo shortcut #5258 by @YgorSouza
• Fix: Window::default_pos does not work #5315 by @rustbasic
• Fix: Sides did not apply the layout position correctly #5303 by @zhatuokun
• Respect Style::override_font_id in RichText #5310 by @MStarha
• Fix disabled widgets "eating" focus #5370 by @lucasmerlin
• Fix cursor clipping in TextEdit inside a ScrollArea #3660 by @juancampa
• Make text cursor always appear on click #5420 by @juancampa
• Fix on_hover_text_at_pointer for transformed layers #5429 by @emilk
• Fix: don't interact with Area outside its constrain_rect #5459 by @MScottMcBee
• Fix broken images on egui.rs (move from git lfs to normal git) #5480 by @emilk
• Fix: ui.new_child should now respect disabled #5483 by @emilk
• Fix zero-width strokes still affecting the feathering color of boxes #5485 by @emilk

eframe changelog

BREAKING: you now need to enable the wayland and/or x11 features to get Linux support, including getting it to work on most CI systems.

⭐ Added

• Support ViewportCommand::Screenshot on web #5438 by @lucasmerlin

🔧 Changed

• Android support #5318 by @parasyte
• Update MSRV to 1.80 #5457 by @emilk
• Use profiling crate to support more profiler backends #5150 by @teddemunnik
• Update glow to 0.16 #5395 by @sagudev
• Forward x11 and wayland features to glutin #5391 by @e00E

🐛 Fixed

• iOS: Support putting UI next to the dynamic island #5211 by @frederik-uni
• Prevent panic when copying text outside of a secure context #5326 by @YgorSouza
• Fix accidental change of FallbackEgl to PreferEgl #5408 by @e00E