Commit Graph

1643 Commits

Author SHA1 Message Date
Lucas Meurer 207e71c2ae
Exclude `\n` when splitting `Galley`s (#7316)
* Follow up to #7146 

Previously when galleys were splitted, each exept the last had an extra
empty row that had to be removed when they were concated. This changes
it to remove the `\n` from the layout jobs when splitting.
2025-07-09 14:53:19 +02:00
Emil Ernerfeldt a7f14ca176
Deprecate `Memory::popup` API in favor of new `Popup` API (#7317)
* Closes  #7037
* Closes #7297

This deprecates all popup-related function in `Memory`, replacing them
with the new `egui::Popup`.

The new API is nicer in all ways, so we should encourage people to use
it.
2025-07-09 12:55:06 +02:00
Emil Ernerfeldt fbe0aadf63
Add `Popup::from_toggle_button_response` (#7315)
Adds a convenience constructor for `Popup`
2025-07-09 10:12:47 +02:00
Lucas Meurer 508c60b2e2
Add `Galley::intrinsic_size` and use it in `AtomLayout` (#7146)
- part of https://github.com/emilk/egui/issues/5762
- also allows me to simplify sizing logic in egui_flex
2025-07-09 08:19:04 +02:00
Emil Ernerfeldt f46926aaf1
Improve texture filtering by doing it in gamma space (#7311)
* Closes https://github.com/emilk/egui/pull/5839

This makes some transparent images look a lot nicer when blended:


![image](https://github.com/user-attachments/assets/7f370aaf-886a-423c-8391-c378849b63ca)

Cursive text will also look nicer.

This unfortunately changes the contract of what
`register_native_texture` expects

---------

Co-authored-by: Adrian Blumer <blumer.adrian@gmail.com>
2025-07-07 17:46:27 +02:00
Emil Ernerfeldt dd1052108e
Add snapshot test for image blending (#7309)
This adds a test that can be used to see the improvements made by this
PR (if any):
* https://github.com/emilk/egui/pull/5839
2025-07-07 13:58:22 +02:00
Emil Ernerfeldt 09596a5e7b
egui_kittest: more ergonomic functions taking `Impl Into<String>` (#7307) 2025-07-07 13:50:53 +02:00
Emil Ernerfeldt b11b77e85f
Save a few CPU cycles with earlier early-out from `Popup::show` (#7306) 2025-07-07 12:07:13 +02:00
Emil Ernerfeldt 933d305159 Improve doc-string for `Image::alt_text` 2025-07-07 12:06:59 +02:00
Emil Ernerfeldt 93d562221b
Change `Rect::area` to return zero for negative rectangles (#7305)
Previously a single-negative rectangle (where `min.x > max.x` XOR `min.y
> max.y`) would return a negative area, while a doubly-negative
rectangle (`min.x > max.x` AND `min.y > max.y`) would return a positive
area. Now both return zero instead.
2025-07-07 12:03:03 +02:00
Emil Ernerfeldt 3622a03a46 Mark `Popup` with `#[must_use]` 2025-07-07 12:02:51 +02:00
Emil Ernerfeldt 6d80707422
Fix tooltips sometimes changing position each frame (#7304)
There was a bug in how we decide where to place a `Tooltip` (or other
`Popup`), which could lead to tooltips jumping around every frame,
especially if it changed size slightly.

The new code is simpler and bug-free.
2025-07-07 12:02:01 +02:00
Emil Ernerfeldt a811b975c2 Better deprecation of SelectableLabel 2025-07-07 09:33:08 +02:00
valadaptive 7ac137bfc1
Make the font atlas use a color image (#7298)
* [x] I have followed the instructions in the PR template

Splitting this out from the Parley work as requested. This removes
`FontImage` and makes the font atlas use a `ColorImage`. It converts
alpha to coverage at glyph-drawing time, not at delta-upload time.

This doesn't do much now, but will allow for color emoji rendering once
we start using Parley.

I've changed things around so that we pass in `text_alpha_to_coverage`
to the `Fonts` the same way we do with `pixels_per_point` and
`max_texture_side`, reusing the existing code to check if the setting
differs and recreating the font atlas if so. I'm not quite sure why this
wasn't done in the first place.

I've left `ImageData` as an enum for now, in case we want to add support
for more texture pixel formats in the future (which I personally think
would be worthwhile). If you'd like, I can just remove that enum
entirely.
2025-07-04 13:15:48 +02:00
Emil Ernerfeldt d94386de3d
Fix `debug_assert` triggered by `menu`/`intersect_ray` (#7299) 2025-07-04 09:55:03 +02:00
Lucas Meurer 47a2bb10b0
Remove `SelectableLabel` (#7277)
* part of https://github.com/emilk/egui/issues/7264
* removes SelectableLabel (Use `Button::selectable` instead)
* updates `Ui::selectable_value/label` with IntoAtoms support

Had to make some changes to `Button` since the SelecatbleLabel had no
frame unless selected.
2025-07-03 16:34:47 +02:00
Lucas Meurer 2b62c68598
Add `egui::Sides` `shrink_left` / `shrink_right` (#7295)
This allows contents (on one of the sides) in egui::Sides to shrink. 

* related https://github.com/rerun-io/rerun/issues/10494
2025-07-03 14:31:35 +02:00
Nicolas 77df407f50
`egui_kittest`: add `failed_pixel_count_threshold` (#7092)
I thought about this - so we have two options here:
1. adding it to `SnapshotOptions` 
2. adding it to every function which I do not like as this would be a
huge breaking change

## Summary

This pull request introduces a new feature to the `SnapshotOptions`
struct in the `egui_kittest` crate, allowing users to specify a
permissible percentage of pixel differences (`diff_percentage`) before a
snapshot comparison is considered a failure. This feature provides more
flexibility in handling minor visual discrepancies during snapshot
testing.

### Additions to `SnapshotOptions`:

* Added a new field `diff_percentage` of type `Option<f64>` to the
`SnapshotOptions` struct. This field allows users to define a tolerance
for pixel differences, with a default value of `None` (interpreted as 0%
tolerance).
* Updated the `Default` implementation of `SnapshotOptions` to
initialize `diff_percentage` to `None`.

### Integration into snapshot comparison logic:

* Updated the `try_image_snapshot_options` function to handle the new
`diff_percentage` field. If a `diff_percentage` is specified, the
function calculates the percentage of differing pixels and allows the
snapshot to pass if the difference is within the specified tolerance.
[[1]](diffhunk://#diff-6f481b5866b82a4fe126b7df2e6c9669040c79d1d200d76b87f376de5dec5065R204)
[[2]](diffhunk://#diff-6f481b5866b82a4fe126b7df2e6c9669040c79d1d200d76b87f376de5dec5065R294-R301)

* Closes <https://github.com/emilk/egui/issues/5683>
* [x] I have followed the instructions in the PR template

---------

Co-authored-by: lucasmerlin <hi@lucasmerlin.me>
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-07-03 14:23:15 +02:00
Emil Ernerfeldt ba577602a4
Fix crash when using infinite widgets (#7296)
* Closes https://github.com/emilk/egui/issues/7100
2025-07-03 13:40:02 +02:00
Blackberry Float db3543d034
Update area struct to allow force resizing (#7114)
This is a really small PR so I am skipping the issue (based on
contributing.md). This change adds an optional field and thus non
breaking for the API.

I ran into an issue during my development of an alerts manager widget
([see PR](https://github.com/blackberryfloat/egui_widget_ext/pull/2))
where I needed a scrollable overlay that did not block clicking areas of
a parent widget when my alerts did not take up the entire parent. To
achieve this I detect the sizing pass via the invisible flag and only
render the alerts content and then on the next pass I add the scroll bar
in around the alert content. Whenever the alert content changed though I
would need to create a new Area with a new id to get proper sizing. That
is a memory leak so I wanted to reset the size state to trigger a sizing
pass. Memory is rightfully protected enough that the path to remove
memory was dropped and I just added a hook to set a resize flag.

I am sure there are better ways but this is what made sense to me.
Looking forward to thoughts.

~~Logistics wise, I have proposed it as a patch because I was based off
0.31.1 for testing. I was also thinking it could be released quickly. I
am happy to cherry pick onto main after. If that is not allowed I can
rebase to main and pull against that.~~ (rebased on main)

---------

Co-authored-by: Wesley Murray <murraywj97@gmail.com>
2025-07-03 13:14:07 +02:00
Lucas Meurer 6d312cc4c7
Add support for scrolling via accesskit / kittest (#7286)
I need to scroll in a snapshot test in my app, and kittest had no
utilities for this. Event::MouseWheel is error prone. This adds support
for some accesskit scroll actions, and uses this in kittest to add
helpers to scroll to a node / scroll the scroll area surrounding a node.

The accesskit code says down/up/left/right `Scrolls by approximately one
screen in a specific direction.`. Unfortunately it's difficult to get
the size of a "screen" (I guess that would be the size of the containing
scroll area)where I implemented the scrolling, so for now I've hardcoded
it to 100px. I think scrolling a fixed amount is still better than not
scrolling at all.

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-07-03 12:02:05 +02:00
Emil Ernerfeldt 378e22e6ec Improve the `ThemePreference` selection UI slightly 2025-07-03 09:16:13 +02:00
Emil Ernerfeldt 40c69cd1ba
Respect and detect `prefers-color-scheme: no-preference` (#7293)
I don't think this will make a difference in practice, but technically
there are three preference states:

* `dark`
* `light`
* `no-preference`

Previously we would only check for `dark`, and if not set would assume
`light`.
Not we also check `light` and if we're neither `dark` or `light` we
assume nothing.
2025-07-03 08:58:45 +02:00
Andreas Reich 1878874f7d
Free textures after submitting queue instead of before with wgpu renderer on Web (#7291) 2025-07-02 16:14:46 +02:00
Emil Ernerfeldt dc79998044
Improve text rendering in light mode (#7290)
This changes how we convert glyph coverage to alpha (and ultimately a
color), but only in light mode.

This is a bit of a hack, because it doesn't fix dark-on-light text in
_dark mode_ (if you have any), but for the common case this PR is a huge
improvement.

You can also tweak this yourself now using
`Visuals::text_alpha_from_coverage` or from the UI (bottom of the
image):


![image](https://github.com/user-attachments/assets/350210d4-c0bb-44b6-84cc-47c2e9d4b9f0)



## Before / After

![widget_gallery_light_x1](https://github.com/user-attachments/assets/21f5a2a0-6b4e-4985-b17f-cd1c7cc01b46)
![widget_gallery_light_x1](https://github.com/user-attachments/assets/5dfec04a-c81c-43ef-8d86-fc48ef7958f1)


## Black text Before/after
If you think the text above looks too weak, it's only because of the
default text color. Here's how it looks like with perfectly `#000000`
black text:


![image](https://github.com/user-attachments/assets/56a4a4f3-c431-4991-b941-a566a4ae94ed)
![Screenshot 2025-07-02 at 13 59
30](https://github.com/user-attachments/assets/df5a91ad-0bb8-4a0f-81a2-50852e7556c1)
2025-07-02 14:58:37 +02:00
Emil Ernerfeldt 8bedaf6e5b
Add light-mode Widget Gallery screenshot test (#7288)
Part of some work to improve text rendering in light mode (again!)
2025-07-02 12:00:36 +02:00
Emil Ernerfeldt 22c6a9ae69
`egui_kittest`: Add `HarnessBuilder::theme` (#7289)
Makes it ergonomic to snapshot test light vs dark mode
2025-07-02 12:00:22 +02:00
Emil Ernerfeldt 0857527f1d
Add `Visuals::weak_text_alpha` and `weak_text_color` (#7285)
* Closes https://github.com/emilk/egui/issues/7262

This also makes the default weak color slightly less weak in most cases.
2025-07-01 20:42:54 +02:00
Emil Ernerfeldt 9d1dce51eb
Extend .typos.toml to enforce american english (#7284)
More or less the same list we use at Rerun
2025-07-01 15:54:00 +02:00
Emil Ernerfeldt 737c61867b
Add `Visuals::text_edit_bg_color` (#7283)
* Closes https://github.com/emilk/egui/issues/7263
2025-07-01 15:13:16 +02:00
Emil Ernerfeldt 9e021f78da
Change `ui.disable()` to modify opacity (#7282)
* Closes https://github.com/emilk/egui/pull/6765


Branched off of https://github.com/emilk/egui/pull/6765 by @tye-exe.

I needed to branch off to update snapshot images

---------

Co-authored-by: tye-exe <tye@mailbox.org>
Co-authored-by: Tye <131195812+tye-exe@users.noreply.github.com>
2025-07-01 14:05:53 +02:00
Emil Ernerfeldt b2995dcb83
Use Rust edition 2024 (#7280) 2025-06-30 14:01:57 +02:00
Emil Ernerfeldt 962c8e26a8
Update MSRV to 1.85 (#7279) 2025-06-30 13:43:27 +02:00
Emil Ernerfeldt 8ba42f322d
Add `Context::cumulative_frame_nr` (#7278) 2025-06-30 13:29:56 +02:00
Emil Ernerfeldt d770cd53a6
Add `Context::current_pass_index` (#7276)
This can be used by developers who wants to add diagnostics when there
is a multi-pass egui frame.
2025-06-30 10:41:27 +02:00
Emil Ernerfeldt 2525546fef Simplify some bezier math 2025-06-30 10:03:54 +02:00
Lukas Rieger c943720eed
Slider: move by at least the next increment when using fixed_decimals (#7066)
fixes https://github.com/emilk/egui/issues/7065
2025-06-29 13:30:39 +02:00
Nicolas ab9f55ab01
Fix crash in `egui_extras::FileLoader` after `forget_image` (#6995)
This pull request modifies the `BytesLoader` implementation for
`FileLoader` in `crates/egui_extras/src/loaders/file_loader.rs` to
improve thread safety and handle unexpected states more gracefully.

### Changes to thread safety and state handling:
* Updated the cache logic to check if the `uri` exists in the cache
before inserting the result. If the `uri` is not found, a log message is
added to indicate the loading was canceled. This change prevents
overwriting cache entries unexpectedly.

* Closes <https://github.com/emilk/egui/issues/6755>
* [x] I have followed the instructions in the PR template
2025-06-27 11:27:03 +02:00
Emil Ernerfeldt ae8363ddb5
eframe web: only cosume copy/cut events if the canvas has focus (#7270)
Previously eframe would "steal" these events (by calling
`stop_propagation/prevent_default`) even when the eframe canvas did not
have focus.
2025-06-27 10:25:47 +02:00
Lucas Meurer 78a8de2e8f
Respect `StyleModifier` in popup `Frame` style (#7265)
This makes it possible to style the Popup's frame using a StyleModifier
2025-06-25 14:26:36 +02:00
Matt Keeter f11a3510ba
Support custom syntect settings in syntax highlighter (#7084)
<!--
Please read the "Making a PR" section of
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* Keep your PR:s small and focused.
* The PR title is what ends up in the changelog, so make it descriptive!
* If applicable, add a screenshot or gif.
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Please be patient! I will review your PR, but my time is limited!
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* Closes <https://github.com/emilk/egui/issues/3964>
* [X] I have followed the instructions in the PR template

This PR adds support for syntax highlighting with custom
`syntect::parsing::SyntaxSet` and `syntect::highlighting::ThemeSet`. It
adds a new `egui_extras::highlight_with` function (enabled with `feature
= "syntect"`), which takes a new public`struct SyntectSettings`
containing the syntax and theme sets.

```rust
let mut builder = SyntaxSetBuilder::new();
builder.add_from_folder("syntax", true).unwrap();
let ps = builder.build();
let ts = syntect::highlighting::ThemeSet::load_defaults();
let syntax =
    egui_extras::syntax_highlighting::SyntectSettings { ps, ts };

// ...elsewhere
egui_extras::syntax_highlighting::highlight_with(
    ui.ctx(),
    ui.style(),
    &theme,
    buf,
    "rhai",
    &syntax,
);
```

There's a little bit of architectural complexity, but it all emerges
naturally from the problem's constraints.

Previously, the `Highlighter` both contained the `syntect` settings
_and_ implemented `egui::cache::ComputerMut` to highlight a string; the
settings would never change. After this change, the `syntect` settings
have become part of the cache key, so we should redo highlighting if
they change. The `Highlighter` becomes an empty `struct` which just
serves to implement `ComputerMut`.

`SyntaxSet` and `ThemeSet` are not hasheable themselves, so can't be
used as cache keys direction. Instead, we can use the *address* of the
`&SyntectSettings` as the key. This requires an object with a custom
`Hash` implementation, so I added a new `HighlightSettings(&'a
SyntectSettings)`, implementing `Hash` using `std::ptr::hash` on the
reference. I think using the address is reasonable – it would be _weird_
for a user to be constantly moving around their `SyntectSettings`, and
there's a warning in the docstring to this effect.

To work _without_ custom settings, `SyntectSettings::default` preserves
the same behavior as before, using `SyntaxSet::load_defaults_newlines`
and `ThemeSet::load_defaults`. If the user doesn't provide custom
settings, then we instantiate a singleton `SyntectSettings` in `data`
and use it; this will only be constructed once.

Finally, in cases where the `syntect` feature is disabled,
`SyntectSettings` are replaced with a unit `()`. This adds a _tiny_
amount of overhead – one singleton `Arc<()>` allocation and a lookup in
`data` per `highlight` – but I think that's better than dramatically
different implementations. If this is an issue, I can refactor to make
it zero-cost when the feature is disabled.
2025-06-24 15:09:29 +02:00
Max “Goldstein” Siling 853feea464
Fix incorrect window sizes for non-resizable windows on Wayland (#7103)
Using physical window sizes leads to all kinds of fun stuff: winit
always uses scale factor 1.0 on start to convert it back to logical
pixels and uses these logical pixels to set min/max size for
non-resizeable windows. You're supposed to adjust size after getting a
scale change event if you're using physical sizes, but adjusting min/max
sizes doesn't seem to work on sway, so the window is stuck with an
incorrect size.

The scale factor we guessed might also be wrong even if there's only a
single display since it doesn't take fractional scale into account.

TL;DR: winit actually wants logical sizes in these methods (since
Wayland in general operates mostly on logical sizes) and converting them
back and forth is lossy.

<!--
Please read the "Making a PR" section of
[`CONTRIBUTING.md`](https://github.com/emilk/egui/blob/main/CONTRIBUTING.md)
before opening a Pull Request!

* Keep your PR:s small and focused.
* The PR title is what ends up in the changelog, so make it descriptive!
* If applicable, add a screenshot or gif.
* If it is a non-trivial addition, consider adding a demo for it to
`egui_demo_lib`, or a new example.
* Do NOT open PR:s from your `master` branch, as that makes it hard for
maintainers to test and add commits to your PR.
* Remember to run `cargo fmt` and `cargo clippy`.
* Open the PR as a draft until you have self-reviewed it and run
`./scripts/check.sh`.
* When you have addressed a PR comment, mark it as resolved.

Please be patient! I will review your PR, but my time is limited!
-->

* Closes https://github.com/emilk/egui/issues/7095
* [x] I have followed the instructions in the PR template

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-06-24 13:44:56 +02:00
Andreas Reich 98add13933
Workaround libpng crash on macos by not creating `NSImage` from png data (#7252) 2025-06-19 10:30:05 +02:00
Lucas Meurer c8b844cd83
Use the new Popup api for the color picker button (#7137)
The color picker popup is now aligned to the bottom left edge (instead
of the bottom right), but I think this makes more sense and is aligned
with ComboBox etc. It also gets the new nice auto positioning.

* closes #5832 
* [x] I have followed the instructions in the PR template
2025-06-18 19:19:05 +02:00
Lucas Meurer 0152a87519
Create custom `egui_kittest::Node` (#7138)
This adds a custom Node struct with proper support for egui types
(`Key`, `Modifiers`, `egui::Event`, `Rect`) instead of needing to use
the kittest / accesskit types.

I also changed the `click` function to do a proper mouse move / mouse
down instead of the accesskit click. Also added `accesskit_click` to
trigger the accesskit event. This resulted in some changed snapshots,
since the elements are now hovered.

Also renamed `press_key` to `key_press` for consistency with
`key_down/key_up`.

Also removed the Deref to the AccessKit Node, to make it clearer when to
expect egui and when to expect accesskit types.

* Closes #5705 
* [x] I have followed the instructions in the PR template
2025-06-17 12:17:38 +02:00
Emil Ernerfeldt 8c2df4802c
Add back old `Tooltip::new` (#7156)
I was a bit too hasty in https://github.com/emilk/egui/pull/7151 and
changed a public API in a breaking way, for no good reason
2025-06-16 19:36:19 +02:00
Zach Bateman 011e0d261a
egui_extras: Enable setting DatePickerButton start and end year explicitly (#7061)
Add the ability to set the `DatePickerButton`'s start and end years via
new `start_year` and `end_year` methods.

Continue to use the existing today - 100 years and today + 10 years
behavior if a year is not specified.

* This more fully closes <https://github.com/emilk/egui/issues/3597> and
expands on <https://github.com/emilk/egui/pull/3599>.
* [x] I have followed the instructions in the PR template
2025-06-16 18:27:26 +02:00
Lucas Meurer 5194c0df3e
Minor atoms improvements (#7145)
Improve some lifetime bounds and add some convenience constructors
2025-06-16 08:42:17 +02:00
Emil Ernerfeldt 06760e1b08
Change API of `Tooltip` slightly (#7151)
We try to be consistent with our parameter order to reduce surprise for
users.

I also renamed a few things to clarify what is what
2025-06-16 08:30:46 +02:00
Emil Ernerfeldt 699be07978 Add Vec2::ONE 2025-06-15 18:01:58 -07:00
Azkellas 96c34139fd
Select all text in DragValue when gaining focus via keyboard (#7107)
Previously, the `DragValue` widget selected all text when focus was
gained via a mouse click, but didn't when focus was gained via keyboard.


https://github.com/user-attachments/assets/5e82ca2c-0214-4201-ad2d-056dabc05e92

This PR makes both gained focus behaving the same way by selecting the
text on focus gained via keyboard.


https://github.com/user-attachments/assets/f246c779-3368-428c-a6b2-cec20dbc20a6

- [x] I have followed the instructions in the PR template

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-06-16 02:11:26 +02:00
valadaptive 54fded362d
Clamp text cursor positions in the same places where we used to (#7081)
Closes #7077.

This fixes the problem shown in #7077 where clearing a `TextEdit`
wouldn't reset its cursor position. I've fixed that by adding back the
`TextCursorState::range` method, which clamps the selection range to
that of the passed `Galley`, and calling it in the same places where it
was called before #5785.

(/cc @juancampa)

* [x] I have followed the instructions in the PR template
2025-06-16 01:53:00 +02:00
Patrick Marks df2c16ef0a
Add anchored text rotation method, and clarify related docs (#7130)
Add a helper method to perform rotation about a specified anchor.

* Closes #7051
2025-06-16 01:42:01 +02:00
Nicolas f33ff2c83d
Make `HSVA` derive serde (#7132)
This pull request introduces a change to the `Hsva` struct in the
`crates/ecolor/src/hsva.rs` file to enable serialization and
deserialization when the `serde` feature is enabled.

* Closes <https://github.com/emilk/egui/issues/7131>
* [x] I have followed the instructions in the PR template
2025-06-16 01:40:42 +02:00
ardocrat 742da95bd7
Support for Back button Key on Android (#7073)
When your press a Back button on Android (for example at
`native-activity`), [Winit translates this
key](47b938dbe7/src/platform_impl/android/keycodes.rs (L237C42-L237C53))
as `NamedKey::BrowserBack`. Added convertion to `Key::Escape` at
`egui-winit` module.

---------

Co-authored-by: Advocat <advocat@ogr.local>
2025-06-16 01:28:27 +02:00
Lucas Meurer 4c04996a72
Fix missing repaint after `consume_key` (#7134)
Usually input events automatically trigger a repaint. But since
consume_key would remove the event egui would think there were no events
and not trigger a repaint. This fixes it by setting a flag on InputState
on consume_key.

* related: https://github.com/rerun-io/rerun/issues/10165
2025-06-13 14:06:50 +02:00
Lucas Meurer 5bc19f3ca3
Report image alt text as text if widget contains no other text (#7142)
- Same as https://github.com/emilk/egui/pull/7136 but now for atomics
2025-06-13 13:54:07 +02:00
Lucas Meurer 6eb7bb6e08
Add `AtomLayout`, abstracing layouting within widgets (#5830)
Today each widget does its own custom layout, which has some drawbacks:
- not very flexible
- you can add an `Image` to `Button` but it will always be shown on the
left side
  - you can't add a `Image` to a e.g. a `SelectableLabel`
- a lot of duplicated code

This PR introduces `Atoms` and `AtomLayout` which abstracts over "widget
content" and layout within widgets, so it'd be possible to add images /
text / custom rendering (for e.g. the checkbox) to any widget.

A simple custom button implementation is now as easy as this:
```rs
pub struct ALButton<'a> {
    al: AtomicLayout<'a>,
}

impl<'a> ALButton<'a> {
    pub fn new(content: impl IntoAtomics) -> Self {
        Self { al: content.into_atomics() }
    }
}

impl<'a> Widget for ALButton<'a> {
    fn ui(mut self, ui: &mut Ui) -> Response {
        let response = ui.ctx().read_response(ui.next_auto_id());

        let visuals = response.map_or(&ui.style().visuals.widgets.inactive, |response| {
            ui.style().interact(&response)
        });

        self.al.frame = self
            .al
            .frame
            .inner_margin(ui.style().spacing.button_padding)
            .fill(visuals.bg_fill)
            .stroke(visuals.bg_stroke)
            .corner_radius(visuals.corner_radius);

        self.al.show(ui)
    }
}

```

The initial implementation only does very basic layout, just enough to
be able to implement most current egui widgets, so:
- only horizontal layout
- everything is centered
- a single item may grow/shrink based on the available space
- everything can be contained in a Frame


There is a trait `IntoAtoms` that conveniently allows you to construct
`Atoms` from a tuple
```
   ui.button((Image::new("image.png"), "Click me!"))
```
to get a button with image and text.


This PR reimplements three egui widgets based on the new AtomLayout:
 - Button
   - matches the old button pixel-by-pixel
- Button with image is now [properly
aligned](https://github.com/emilk/egui/pull/5830/files#diff-962ce2c68ab50724b01c6b64c683c4067edd9b79fcdcb39a6071021e33ebe772)
in justified layouts
   - selected button style now matches SelecatbleLabel look
- For some reason the DragValue text seems shifted by a pixel almost
everywhere, but I think it's more centered now, yay?
 - Checkbox
- basically pixel-perfect but apparently the check mesh is very slightly
different so I had to update the snapshot
   - somehow needs a bit more space in some snapshot tests?
 - RadioButton
   - pixel-perfect
   - somehow needs a bit more space in some snapshot tests?

I plan on updating TextEdit based on AtomLayout in a separate PR (so
you could use it to add a icon within the textedit frame).
2025-06-13 09:39:52 +02:00
Emil Ernerfeldt f0abce9bb8
`Button` inherits the `alt_text` of the `Image` in it, if any (#7136)
If a `Button` has an `Image` in it (and no text), then the
`Image::alt_text` will be used as the accessibility label for the
button.
2025-06-11 23:00:59 +02:00
Nicolas 9f9153805d
lint: fix lints appearing in rust stable currently (#7118)
* [x] I have followed the instructions in the PR template
2025-06-11 17:38:06 +02:00
Rinde van Lon cfb10a04f5
Improve `ComboBox` doc example (#7116)
Improves the `ComboBox` example with some code that shows how to handle
changes in the `ComboBox`’s selection. The approach is based on the
advice given in https://github.com/emilk/egui/discussions/923 . I hope
this saves future me (and hopefully others) a web search for how to do
this.

* [x] I have followed the instructions in the PR template
2025-06-11 12:01:34 +02:00
Emil Ernerfeldt bdbe655852 Mark HarnessBuilder build functions with #[must_use] 2025-06-07 17:19:12 -07:00
Emil Ernerfeldt 209e818bd8 Improve deprecation message for old `egui::menu` 2025-06-07 10:24:28 -07:00
Emil Ernerfeldt 6e34152fa0
Add `Context::format_modifiers` (#7125)
Convenience
2025-06-07 19:22:16 +02:00
Emil Ernerfeldt 53098fad7b
Support vertical-only scrolling by holding down Alt (#7124)
* Closes https://github.com/emilk/egui/issues/7120

You can now zoom only the X axis by holding down shift, and zoom only
the Y axis by holding down ALT.

In summary

* `Shift`: horizontal
* `Alt`: vertical
* `Ctrl`: zoom (`Cmd` on Mac)

Thus follows:
* `scroll`: pan both axis (at least for trackpads and mice with two-axis
scroll)
* `Shift + scroll`: pan only horizontal axis
* `Alt + scroll`: pan only vertical axis
* `Ctrl + scroll`: zoom all axes
* `Ctrl + Shift + scroll`: zoom only horizontal axis
* `Ctrl + Alt + scroll`: zoom only vertical axis

This is provided the application uses `zoom_delta_2d` for its zooming
needs.

The modifiers are exposed in `InputOptions`, but it is strongly
recommended that you do not change them.

## Testing
Unfortunately we have no nice way of testing this in egui.
But I've tested it in `egui_plot`.
2025-06-07 19:18:13 +02:00
Emil Ernerfeldt 1d5b011793
Add `OperatingSystem::is_mac` (#7122)
* Part of https://github.com/emilk/egui/issues/7120
2025-06-07 18:36:23 +02:00
Emil Ernerfeldt cbd9c60399
Add `Modifiers::matches_any` (#7123)
* Part of https://github.com/emilk/egui/issues/7120
2025-06-07 18:36:16 +02:00
Emil Ernerfeldt 9681644936
Move all input-related options into `InputOptions` (#7121) 2025-06-07 18:25:19 +02:00
Guy Marshall 1abccb3f47
Typo in `run_native` doc comment (replace "a an" with "an") (#7094)
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* The PR title is what ends up in the changelog, so make it descriptive!
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2025-06-03 16:57:43 +02:00
Emil Ernerfeldt 92fea8a18f
Remove things that have been deprecated for over a year (#7099)
Removes all things that were marked `#[deprecated]` more than 12 months
ago
2025-05-28 09:47:15 +02:00
Emil Ernerfeldt 2cf6a3a9a6
Track original SVG size (#7098)
This fixes bugs related to how an `Image` follows the size of an SVG.

We track the "source size" of each image, i.e. the original width/height
of the SVG, which can be different from whatever it was rasterized as.
2025-05-28 08:33:01 +02:00
Emil Ernerfeldt da67465a6c
Add `Response::clicked_with_open_in_background` (#7093)
Useful for buttons that should act as Hyperlinks
2025-05-26 19:44:55 +02:00
Matt Keeter a085d0b3a5
Fix typo in `egpu-wgpu/Cargo.toml` (#7083) 2025-05-25 16:10:39 +02:00
Emil Ernerfeldt 87de733da3
Better define the meaning of `SizeHint` (#7079) 2025-05-23 13:52:36 +02:00
Emil Ernerfeldt ec8b41f7ec
Make `Image::paint_at` pixel-perfect crisp for SVG images (#7078) 2025-05-23 10:15:17 +02:00
Emil Ernerfeldt b8334f365b
Fix sometimes blurry SVGs (#7071)
* Closes https://github.com/emilk/egui/issues/3501

The problem occurs when you want to render the same SVG at different
scales, either at the same time in different parts of your UI, or at two
different times (e.g. the DPI changes).

The solution is to use the `SizeHint` as part of the key.

However, when you have an SVG in a resizable container, that can lead to
hundreds of versions of the same SVG. So new eviction code is added to
handle this case.
2025-05-21 20:01:40 +02:00
Emil Ernerfeldt b05a40745f
Bug fix: make sure `end_pass` is called for all loaders (#7072)
None of the built-in loaders does any cache eviction (yet), but 3rd
party ones might have
2025-05-21 19:52:59 +02:00
Emil Ernerfeldt f57cb27386
Include test windows in `egui_demo_lib` snapshot tests (#7070) 2025-05-21 17:44:27 +02:00
Emil Ernerfeldt 54ae2360ec
Fix incorrect color fringe colors on SVG:s (#7069)
This is a problem that affected the fringes on all SVG:s with
transparency, especially on a light background.

## Before

![image](https://github.com/user-attachments/assets/342823ad-005c-4f82-83a6-d2dcccfd3221)


## After

![image](https://github.com/user-attachments/assets/73398265-d333-461b-8c2b-fce405d95a9c)
2025-05-21 17:18:36 +02:00
Emil Ernerfeldt f23618701f
Update `emoji-icon-font` with fix for fullwidth latin characters (#7067)
* This PR is based on https://github.com/emilk/egui/pull/5877 by
@danielhjacobs

## Original PR description
Replace the current `emoji-icon-font.ttf` with the updated font from
https://github.com/jslegers/emoji-icon-font/pull/19 to address
https://github.com/emilk/egui/issues/1284. The second commit then
removes the now unnecessary hack.

* Closes https://github.com/emilk/egui/issues/1284
* Closes https://github.com/emilk/egui/pull/5877

---------

Co-authored-by: Daniel Jacobs <danielhunterjacobs@gmail.com>
2025-05-21 13:22:23 +02:00
Patrick Marks a15040c011
Fix `visual_bounding_rect` for rotated text (#7050)
TextShape.visual_bounding_rect was not taking the text rotation into
account. I manually tested drawing the new bounding box on top of the
text for various rotations & anchor settings. For example:
<img width="191" alt="image"
src="https://github.com/user-attachments/assets/56528fc7-7e7d-45af-b92a-c1cd307ff205"
/>

The unit test I added will fail without this patch, but perhaps doesn't
add much value.

* [x] I have followed the instructions in the PR template
2025-05-18 19:19:12 +02:00
Piotr Podusowski 12cd35f48c
Disallow `accesskit` on Android NativeActivity, making `hello_android` working again (#6855)
Follow up for https://github.com/emilk/egui/pull/6766

I wasn't sure if `compile_error` is appropriate. It felt right.
2025-05-18 13:17:28 +02:00
Abdellatif EL MIZEB cb4acbc262
Fix typo in deprecation message for `ComboBox::from_id_source` (#7055)
This PR corrects the deprecation note on ComboBox::from_id_source:

Changed:
`#[deprecated = "Renamed id_salt"]`

To:
`#[deprecated = "Renamed from_id_salt"]`
2025-05-18 13:02:58 +02:00
Emil Ernerfeldt 81b7e7f05a
Make the default spinner more high-res (#7044)
Make it nice and smooth when big
2025-05-11 22:15:07 +02:00
TÖRÖK Attila 773232b139
Update to wgpu 25 (#6744)
Co-authored-by: Andreas Reich <r_andreas2@web.de>
2025-05-10 13:16:49 +02:00
Hubert Głuchowski e9609ac94e
Fix `leading_space` sometimes being ignored during paragraph splitting (#7031)
Fixes a regression introduced in https://github.com/emilk/egui/pull/5411
(possibly
d74bee536f)
that breaks `leading_space` handling.
I think this is what the condition should be but I haven't touched this
code in a while.
2025-05-08 15:47:13 +02:00
Lucas Meurer 120d736cfc
Add `ImageLoader::has_pending` and `wait_for_pending_images` (#7030)
With kittest it was difficult to wait for images to be loaded before
taking a snapshot test.
This PR adds `Harness::with_wait_for_pending_images` (true by default)
which will cause `Harness::run` to sleep until all images are loaded (or
`HarnessBuilder::with_max_steps` is exceeded).

It also adds a new ImageLoader::has_pending and
BytesLoader::has_pending, which should be implemented if things are
loaded / decoded asynchronously.

It reverts https://github.com/emilk/egui/pull/6901 which was my previous
attempt to fix this (but this didn't work since only the tested crate is
compiled with cfg(test) and not it's dependencies)
2025-05-08 09:27:52 +02:00
Emil Ernerfeldt d0876a1a60
Rename `master` branch to `main` (#7034)
For consistency with other repositories, i.e. so I can write `git
checkout main` without worrying which repo I'm browsing.
2025-05-08 09:15:42 +02:00
Emil Ernerfeldt 7216d0e386
Use mimalloc for benchmarks (#7029)
`mimalloc` is a _much_ faster allocator, especially important when doing
a lot of small allocations (which egui does).

We use `mimalloc` in Rerun, and I recommend everyone to use it.

## The difference it makes

![image](https://github.com/user-attachments/assets/b22e0025-bc5e-4b3c-94e0-74ce46e86f85)
2025-05-06 17:54:06 +02:00
Lucas Meurer 5bb20f511e
Fix links and text selection in horizontal_wrapped layout (#6905)
* Closes <https://github.com/emilk/egui/issues/6904>
* [x] I have followed the instructions in the PR template

This was broken in https://github.com/emilk/egui/pull/5411. Not sure if
this is the best fix or if `PlacedRow::rect` should be updated, but I
think it makes sense that PlacedRow::rect ignores leading space.
2025-05-06 17:40:18 +02:00
Lucas Meurer 71e0b0859c
Make `WidgetText` smaller and faster (#6903)
* In preparation of #5830, this should reduce the performance impact of
that PR

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-05-06 17:35:56 +02:00
Alexander Nadeau 6c922f72a8
Fix text distortion on mobile devices/browsers with `glow` backend (#6893)
<!--
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Did not test on platforms other than my phone, but I can't imagine it
causing problems. AFAIK if highp isn't supported then `precision highp
float;` needs to still not cause the program to fail to link/compile or
anything; it should just silently use some other precision.

* Fixes https://github.com/emilk/egui/issues/4268 for me but I only
tested it on a native Android app and I don't know whether backends
other than glow are affected.
* [x] I have followed the instructions in the PR template (but the
change is trivial so I'm just doing it from the master branch)

Before:

![image](https://github.com/user-attachments/assets/9f449749-5a48-4e9c-aef0-7a8ac3912eb6)

After:

![image](https://github.com/user-attachments/assets/544e5977-13e0-411a-bccf-b15a15289e28)
2025-04-30 14:12:08 +02:00
Lucas Meurer 2947821c60
Load images on the ui thread for tests (#6901)
https://github.com/emilk/egui/pull/5394 made it so images would load on
a background thread, which is great. But this makes snapshot tests that
have images via include_image!() flakey since they might or might not
load by the time the snapshot is rendered.
This is no perfect solution, since the underlying problem of "waiting
for something async to happen" still exists and we should add some more
general solution for that.
2025-04-30 12:55:57 +02:00
Lucas Meurer fdaac16e4a
Fix image button panicking with tiny `available_space` (#6900)
* Fixes <https://github.com/emilk/egui/issues/6772>
* [x] I have followed the instructions in the PR template
2025-04-30 10:40:50 +02:00
Lucas Meurer 1ab3259008
Add italic button benchmark to test `RichText` performance impact (#6897)
Time on my m4 pro macbook: 302.79 ns (vs 303.83 ns for the regular
button 🤷)
2025-04-30 10:38:41 +02:00
Will Brown c075053391
Add external eventloop support (#6750)
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* The PR title is what ends up in the changelog, so make it descriptive!
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* Closes #2875
* Closes https://github.com/emilk/egui/pull/3340
* [x] I have followed the instructions in the PR template

Adds `create_native`. Similiar to `run_native` but it returns an
`EframeWinitApplication` which is a `winit::ApplicationHandler`. This
can be run on your own event loop. A helper fn `pump_eframe_app` is
provided to pump the event loop and get the control flow state back.

I have been using this approach for a few months.

---------

Co-authored-by: Will Brown <opensource@rebeagle.com>
2025-04-29 12:09:23 +02:00
mitchmindtree fed2ab5df3
feat: Add `Scene::sense` option for customising how `Scene` should respond to user input (#5893)
Allows for specifying how the `Scene` should respond to user input.

With #5892, closes #5891.

---

Edit: Failing tests unrelated and appear on master:
https://github.com/emilk/egui/actions/runs/14330259861/job/40164414607.

---------

Co-authored-by: Lucas Meurer <lucasmeurer96@gmail.com>
2025-04-29 12:07:39 +02:00
TÖRÖK Attila d666742c13
Bump `ron` to `0.10.1` (#6861)
This should help `cargo-deny` be at peace with
https://github.com/emilk/egui/pull/6860, pending
https://github.com/gfx-rs/wgpu/pull/7557.
2025-04-29 12:03:24 +02:00
Gaelan McMillan 3a02963c33
Add macOS-specific `has_shadow` and `with_has_shadow` to ViewportBuilder (#6850)
* [X] I have followed the instructions in the PR template

This PR fixes a ghosting issue I encountered while making a native macOS
transparent overlay app using egui and eframe by exposing the [existing
macOS window attribute
`has_shadow`](https://docs.rs/winit/latest/winit/platform/macos/trait.WindowExtMacOS.html#tymethod.has_shadow)
to the `ViewportBuilder` via a new `with_has_shadow` option.

## Example of Ghosting Issue

### Before `ViewportBuilder::with_has_shadow`
By default, the underlying `winit` window's `.has_shadow()` defaults to
`true`.


https://github.com/user-attachments/assets/c3dcc2bd-535a-4960-918e-3ae5df503b12

### After `ViewportBuilder::with_has_shadow`


https://github.com/user-attachments/assets/484462a1-ea88-43e6-85b4-0bb9724e5f14

Source code for the above example can be found here:

https://github.com/gaelanmcmillan/egui-overlay-app-with-shadow-artifacts-example/blob/main/src/main.rs


### Further background
By default on macOS, `winit` windows have a drop-shadow effect. When
creating a fully transparent overlay GUI, this drop-shadow can create a
ghosting effect, as the window content has a drop shadow which is not
cleared by the app itself. This issue has been experienced by users of
`bevy`, another Rust project that has an upstream dependency on `winit`:
https://github.com/bevyengine/bevy/issues/18673
2025-04-29 12:02:42 +02:00
Lucas Meurer 7d185acb41
Add button benchmark (#6854)
This helped me benchmark the atomic layout (#5830) changes.

I also realized that the label benchmark wasn't testing the painting,
since the buttons at some point will be placed outside the screen_rect,
meaning it won't be painted.

This fixes it by benching the label in a child ui.

The `label &str` benchmark went from 483 ns to 535 ns with these
changes.

EDIT:

I fixed another benchmark problem, since the benchmark would show the
same widget millions of times for a single frame, the WidgetRects
hashmap would get huge, causing each iteration to slow down a bit more
and causing the benchmark to have unreliable results.

With this the `label &str` benchmark went from 535ns to 298ns. Also the
`label format!` benchmark now takes almost the same time (302 ns).
Before, it was a lot slower since it reused the same Context which
already had millions of widget ids.
2025-04-28 11:58:05 +02:00
MStarha f2ce6424f3
`ScrollArea` improvements for user configurability (#5443)
* Closes <https://github.com/emilk/egui/issues/5406>
* [x] I have followed the instructions in the PR template

The changes follow what is described in the issue with a couple changes:
- Scroll bars are not hidden when dragging is disabled, for that
`ScrollArea::scroll_bar_visibility()` has to be used, this is as not to
limit the user configurability by imposing a specific function. The user
might want to retain the scrollbars visibility to show the current
position.
- The input for mouse wheel scrolling is unchanged. When I inspected the
code initially I made a mistake in recognizing the source of scrolling.
Current implementation is in fact using
`InputState::smooth_scroll_delta` and not `PassState::scroll_delta`,
therefore it is possible to prevent scrolling by setting the
`InputState::smooth_scroll_delta` to zero before painting the
`ScrollArea`.

A simple demo is available at
https://github.com/MStarha/egui_scroll_area_test
2025-04-25 11:01:22 +02:00
Emil Ernerfeldt f9245954eb
Enable more clippy lints (#6853)
* Follows https://github.com/emilk/egui/pull/6848
2025-04-24 17:32:50 +02:00
TÖRÖK Attila fdb9aa282a
Raise MSRV to 1.84 (#6848)
Prerequisite of https://github.com/emilk/egui/pull/6744.
See: https://github.com/gfx-rs/wgpu/pull/7218,
https://github.com/gfx-rs/wgpu/pull/7425

Please be aware that Rust 1.84 enables some (more) WASM extensions by
default, and ships with an `std` built with them enabled:
https://blog.rust-lang.org/2024/09/24/webassembly-targets-change-in-default-target-features/
According to `rustc +1.84 --print=cfg --target wasm32-unknown-unknown`,
these are: `multivalue`, `mutable-globals`, `reference-types`, and
`sign-ext`.
(c.f. `rustc +1.84 --print=cfg --target wasm32-unknown-unknown -C
target-cpu=mvp` enabling none.)
For reference: https://webassembly.org/features/

----

If support is desired for ancient/esoteric browsers that don't have
these implemented, there are two ways to get around this:
- Target `wasm32v1-none` instead, but that's a `no-std` target, and I
suppose a lot of dependencies don't work that way (e.g.
https://github.com/gfx-rs/wgpu/issues/6826)
- Using the `-Ctarget-cpu=mvp` and `-Zbuild-std=panic_abort,std` flags,
and the `RUSTC_BOOTSTRAP=1` escape hatch to allow using the latter with
non-`nightly` toolchains - until
https://github.com/rust-lang/wg-cargo-std-aware is stabilized. (For
reference:
https://github.com/ruffle-rs/ruffle/pull/18528/files#diff-fb2896d189d77b35ace9a079c1ba9b55777d16e0f11ce79f776475a451b1825a)

I don't think either of these is particularly advantageous, so I suggest
just accepting that browsers will have to have some extensions
implemented to run `egui`.
2025-04-24 17:00:29 +02:00
Bennet Bleßmann 6f910f60e9
Protect against NaN in hit-test code (#6851)
* Closes <https://github.com/emilk/egui/issues/6756>
* [x] I have followed the instructions in the PR template
2025-04-24 14:50:34 +02:00
MStarha 69b9f0eede
Rework `TextEdit` arrow navigation to handle Unicode graphemes (#5812)
* [x] I have followed the instructions in the PR template

Previously, navigating text in `TextEdit` with Ctrl + left/right arrow
would jump inside words that contained combining characters (i.e.
diacritics). This PR introduces new dependency of `unicode-segmentation`
to handle grapheme encoding. The new implementation ignores whitespace
and other separators such as `-` (dash) between words, but respects `_`
(underscore).

---------

Co-authored-by: lucasmerlin <hi@lucasmerlin.me>
2025-04-22 17:44:10 +02:00
rustbasic a0f072ab1e
Fix bug in pointer movement detection (#5329)
Fix: Popups do not appear in certain situations.

* Closes #5080
* Related #5107

The root cause is that `last_move_time` is not updated in certain
situations (slow situations?).
2025-04-22 12:00:22 +02:00
Sven Niederberger 61e883be25
Revert "Add `OutputCommand::SetPointerPosition` to set mouse position" (#5867)
Reverts emilk/egui#5776

I noticed that this is already a `ViewportCommand`. Sorry for not seeing
that earlier.
2025-04-22 11:52:20 +02:00
mitchmindtree cd318f0e55
feat: Add `Scene::drag_pan_buttons` option. Allows specifying which pointer buttons pan the scene by dragging. (#5892)
This adds an option for specifying the set of pointer buttons that can
be used to pan the scene via clicking and dragging.

The original behaviour where all buttons can pan the scene by default is
maintained.

Addresses part of #5891.

---

Edit: It looks like the failing test is unrelated and also appears on
master:
https://github.com/emilk/egui/actions/runs/14330259861/job/40164414607.

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-04-22 11:42:24 +02:00
mkalte 114460c1de
Change popup memory to be per-viewport (#6753)
Starting with 77244cd4c5 the popup
open-state is cleaned up per memory pass.

This becomes problematic for implementations that share memory between
viewports (i.e. all of them, as far as i understand it), because each
viewport gets a context pass, and thus a memory pass, which cleans out
popup open state.

To illustrate my issue, i have modifed the multiple viewport example to
include a popup menu for the labels:
https://gist.github.com/mkalte666/4ecd6b658003df4c6d532ae2060c7595
(changes not included in this pr).

Then, when i try to use the popups, i get this: 


https://github.com/user-attachments/assets/7d04b872-5396-4823-bf30-824122925528

Immediate viewports just break popup handling in general, while deferred
viewports kinda work, or dont. In this example ill be honest, it kind of
still did, sometimes. In my more complex app with multiple viewports
(where i encountered this first) it also just broke - even when just
showing root and one nother. Probably to do with the order wgpu vs glow
draws the viewports? Im not sure. In any case:

This commit adds `Memory::popup` (now `Memory::popups`) to the
per-viewport state of memory, including viewport aware cleanup, and
adding it to the list of things cleaned if a viewport goes away.

This results in the expected behavior:



https://github.com/user-attachments/assets/fd1f74b7-d3b2-4edc-8dc4-2ad3cfa2160e

I will note that with this, changing focus does not cause a popup to be
closed, which is consistent with current behavior on a single app.

Hope this helps 

~Malte 

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* Closes <https://github.com/emilk/egui/issues/THE_RELEVANT_ISSUE>
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went through.
2025-04-22 11:38:17 +02:00
Marek Bernat 009bfe5ada
Add a `Slider::update_while_editing(bool)` API (#5978)
* Closes #5976
* [x] I have followed the instructions in the PR template
- The `scripts/check.sh` fails in `cargo-deny` because of a security
vulnerability in `crossbeam-channel` but this is also present on
`master`.


https://github.com/user-attachments/assets/a964c968-bb76-4e56-88e1-d1e3d51a401a
2025-04-22 11:28:34 +02:00
Lucas Meurer 501905b60d
Add tests for layout and visuals of most egui widgets (#6752)
This is mostly in preparation for #5830 where I want to ensure that I
don't introduce any regressions
2025-04-16 18:58:58 +02:00
Christopher Cerne 0f1d6c2818
Support SVG Text Rendering in egui_extras (#5979)
**Added**
* Create `svg_text` feature flag to support text rendering & loading of
system fonts.

**Changed**
* Updates `resvg` to `0.45`.
* Adds `usvg::Options` field to the `SvgLoader` structure.
* Change function signatures to support passing `usvg::Options` to
downstream `load_svg_bytes_with_size`.

**Additional Info**
* I used this PR as a reference:
https://github.com/emilk/egui/pull/4659. @xNWP can you see if this
adequately resolves your concern from your original PR?
* Closes https://github.com/emilk/egui/issues/5977 (we may want to open
another issue for my other thoughts in this issue)
* Also, I would like to thank @xNWP and their original PR for being a
good reference for this one.
* [x] I have followed the instructions in the PR template
2025-04-14 11:13:17 +02:00
Lucas Meurer 7055141c18
Update failing snapshot tests (#5894)
For some reason the pipeline in https://github.com/emilk/egui/pull/5698
succeeded even though the snapshots should have been updated. This
updates the snapshots.
2025-04-09 12:11:46 +02:00
giuseppeferrari c6bd30642a
Avoid infinite extension of ColorTest inside a Window (#5698)
Current implementation of ColorTest infinitely expand horizontally at
each redraw if included in a Window.

The effect can be see replacing the Panel in the ColorTestApp::update
with a Window:
```
egui::CentralPanel::default().show(ctx, |ui| {
   egui::Window::new("Colors").vscroll(true).show(ctx, |ui| {
   if frame.is_web() {
      ui.label(
         "NOTE: Some old browsers stuck on WebGL1 without sRGB support will not pass the color test.",
      );
      ui.separator();
   }
   egui::ScrollArea::both().auto_shrink(false).show(ui, |ui| {
      self.color_test.ui(ui);
   });
   self.color_test.ui(ui);
});
```

The cause is the is the _pixel_test_strokes_ function that, at each
redraw, tries to expand the target rectangle of 2.0 points in each
direction.
2025-04-08 11:38:13 +02:00
Aarni Koskela 36e007bd8c
Add overline option for Table rows (#5637)
* Closes no issue, I just needed this for an app and figured it could be
useful.
* [x] I have followed the instructions in the PR template

This PR adds an `overline` option for `egui_extras::TableRow`, which is
useful for visually grouping rows. The overline consumes no layout
space.

A screenshot of the demo app, showing every 7th row getting an overline.

<img width="704" alt="Screenshot 2025-01-25 at 14 40 08"
src="https://github.com/user-attachments/assets/9ccbee3d-296d-4afd-9290-c669e4ede1c0"
/>

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-04-08 11:36:43 +02:00
mitchmindtree 4445497546
`Scene`: Set transform layer before calling user content (#5884)
This changes the `Scene` behaviour to call `set_transform_layer` prior
to calling the user content fn, rather than after.

### Motivation

This provides a simple way for the user to access the `TSTransform` that
will be applied to the `Scene` within the user content function, e.g.

```rust
ui.ctx().layer_transform_to_global(ui.layer_id())
```

Previously getting the transform like this still kind of worked, but
resulted in the user content lagging behind the actual scene position by
a single frame, which looks a bit strange.

With this PR, the user content using the transform no longer lags by a
frame, and matches the scene's transform perfectly.

Accessing the `TSTransform` of the `Scene` within the user content
function is useful for the case where the user may want to instantiate
new `Ui` sublayers that also track the scene (by default, sublayers do
*not* apply the same transform as the scene, likely the cause of #5682).
With these changes, the user can have sublayers track the scene like so:

```rust
let scene_layer = ui.layer_id();
let sub_layer = egui::LayerId::new(scene_layer.order, self.id);
ui.ctx().set_sublayer(scene_layer, sub_layer);
let scene_transform = ui.ctx().layer_transform_to_global(scene_layer).unwrap();
ui.ctx().set_transform_layer(sub_layer, scene_transform);
```

### Tested with

- `egui_demo_app` scene example.
- Local `egui_graph` demo example.

---

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* The PR title is what ends up in the changelog, so make it descriptive!
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* Closes <https://github.com/emilk/egui/issues/THE_RELEVANT_ISSUE>
* [x] I have followed the instructions in the PR template
2025-04-08 11:16:29 +02:00
kernelkind fe631ff9ea
Use `TextBuffer` for `layouter` in `TextEdit` instead of `&str` (#5712)
This change allows `layouter` to use the `TextBuffer` instead of `&str`
in the closure. It is necessary when layout decisions depend on more
than just the raw string content, such as metadata stored in the
concrete type implementing `TextBuffer`.

In [our use case](https://github.com/damus-io/notedeck/pull/723), we
needed this to support mention highlighting when a user selects a
mention. Since mentions can contain spaces, determining mention
boundaries from the `&str` alone is impossible. Instead, we use the
`TextBuffer` implementation to retrieve the correct bounds.

See the video below for a demonstration:


https://github.com/user-attachments/assets/3cba2906-5546-4b52-b728-1da9c56a83e1


# Breaking change

This PR introduces a breaking change to the `layouter` function in
`TextEdit`.

Previous API:
```rust
pub fn layouter(mut self, layouter: &'t mut dyn FnMut(&Ui, &str, f32) -> Arc<Galley>) -> Self
```

New API:
```rust
pub fn layouter(mut self, layouter: &'t mut dyn FnMut(&Ui, &dyn TextBuffer, f32) -> Arc<Galley>) -> Self
```


## Impact on Existing Code

• Any existing usage of `layouter` will **no longer compile**.
• Callers must update their closures to use `&dyn TextBuffer` instead of
`&str`.

## Migration Guide

Before:
```rust
let mut layouter = |ui: &Ui, text: &str, wrap_width: f32| {
    let layout_job = my_highlighter(text);
    layout_job.wrap.max_width = wrap_width;
    ui.fonts(|f| f.layout_job(layout_job))
};
```

After:
```rust
let mut layouter = |ui: &Ui, text: &dyn TextBuffer, wrap_width: f32| {
    let layout_job = my_highlighter(text.as_str());
    layout_job.wrap.max_width = wrap_width;
    ui.fonts(|f| f.layout_job(layout_job))
};
```

---

* There is not an issue for this change.
* [x]  I have followed the instructions in the PR template

Signed-off-by: kernelkind <kernelkind@gmail.com>
2025-04-06 18:45:20 +02:00
Lucas Meurer d78fc39386
Use lychee link checker instead of linkinator (#5868)
Seems like linkinator doesn't find any files:
https://github.com/emilk/egui/pull/5853#issuecomment-2765526298

This will check all links in .md files (except CHANGELOG.md) and in toml
files
2025-04-03 09:26:49 +02:00
Hubert Głuchowski 557bd56e19
Optimize editing long text by caching each paragraph (#5411)
## What
(written by @emilk)
When editing long text (thousands of line), egui would previously
re-layout the entire text on each edit. This could be slow.

With this PR, we instead split the text into paragraphs (split on `\n`)
and then cache each such paragraph. When editing text then, only the
changed paragraph needs to be laid out again.

Still, there is overhead from splitting the text, hashing each
paragraph, and then joining the results, so the runtime complexity is
still O(N).

In our benchmark, editing a 2000 line string goes from ~8ms to ~300 ms,
a speedup of ~25x.

In the future, we could also consider laying out each paragraph in
parallel, to speed up the initial layout of the text.

## Details
This is an ~~almost complete~~ implementation of the approach described
by emilk [in this
comment](<https://github.com/emilk/egui/issues/3086#issuecomment-1724205777>),
excluding CoW semantics for `LayoutJob` (but including them for `Row`).
It supersedes the previous unsuccessful attempt here:
https://github.com/emilk/egui/pull/4000.

Draft because:
- [X] ~~Currently individual rows will have `ends_with_newline` always
set to false.
This breaks selection with Ctrl+A (and probably many other things)~~
- [X] ~~The whole block for doing the splitting and merging should
probably become a function (I'll do that later).~~
- [X] ~~I haven't run the check script, the tests, and haven't made sure
all of the examples build (although I assume they probably don't rely on
Galley internals).~~
- [x] ~~Layout is sometimes incorrect (missing empty lines, wrapping
sometimes makes text overlap).~~
- A lot of text-related code had to be changed so this needs to be
properly tested to ensure no layout issues were introduced, especially
relating to the now row-relative coordinate system of `Row`s. Also this
requires that we're fine making these very breaking changes.

It does significantly improve the performance of rendering large blocks
of text (if they have many newlines), this is the test program I used to
test it (adapted from <https://github.com/emilk/egui/issues/3086>):
<details>
<summary>code</summary>

```rust
use eframe::egui::{self, CentralPanel, TextEdit};
use std::fmt::Write;

fn main() -> Result<(), eframe::Error> {
    let options = eframe::NativeOptions {
        ..Default::default()
    };

    eframe::run_native(
        "editor big file test",
        options,
        Box::new(|_cc| Ok(Box::<MyApp>::new(MyApp::new()))),
    )
}

struct MyApp {
    text: String,
}

impl MyApp {
    fn new() -> Self {
        let mut string = String::new();
        for line_bytes in (0..50000).map(|_| (0u8..50)) {
            for byte in line_bytes {
                write!(string, " {byte:02x}").unwrap();
            }
            write!(string, "\n").unwrap();
        }
        println!("total bytes: {}", string.len());
        MyApp { text: string }
    }
}

impl eframe::App for MyApp {
    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
        CentralPanel::default().show(ctx, |ui| {
            let start = std::time::Instant::now();
            egui::ScrollArea::vertical().show(ui, |ui| {
                let code_editor = TextEdit::multiline(&mut self.text)
                    .code_editor()
                    .desired_width(f32::INFINITY)
                    .desired_rows(40);
                let response = code_editor.show(ui).response;
                if response.changed() {
                    println!("total bytes now: {}", self.text.len());
                }
            });
            let end = std::time::Instant::now();
            let time_to_update = end - start;
            if time_to_update.as_secs_f32() > 0.5 {
                println!("Long update took {:.3}s", time_to_update.as_secs_f32())
            }
        });
    }
}
```
</details>

I think the way to proceed would be to make a new type, something like
`PositionedRow`, that would wrap an `Arc<Row>` but have a separate `pos`
~~and `ends_with_newline`~~ (that would mean `Row` only holds a `size`
instead of a `rect`). This type would of course have getters that would
allow you to easily get a `Rect` from it and probably a `Deref` to the
underlying `Row`.
~~I haven't done this yet because I wanted to get some opinions whether
this would be an acceptable API first.~~ This is now implemented, but of
course I'm still open to discussion about this approach and whether it's
what we want to do.

Breaking changes (currently):
- The `Galley::rows` field has a different type.
- There is now a `PlacedRow` wrapper for `Row`.
- `Row` now uses a coordinate system relative to itself instead of the
`Galley`.

* Closes <https://github.com/emilk/egui/issues/3086>
* [X] I have followed the instructions in the PR template

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-04-01 18:55:39 +02:00
Emil Ernerfeldt e275409eb1
Fix: transform `TextShape` underline width (#5865)
Minor bug fix when transforming a `TextShape` with a `underline` (used
for e.g. hyperlinks). Before the underline width would not scale
properly; now it will.
2025-03-30 16:36:03 +02:00
Emil Ernerfeldt e3acd71090
Make text background rects pixel-sharp (#5864)
Small visual teak: make sure the background text color is pixel-aligned.
2025-03-30 16:21:00 +02:00
Hank Jordan 943e3618fc
Improve drag-to-select text (add margins) (#5797)
Might want to draw from `interaction.interact_radius` style instead of
hard-coding the margin, but I didn't want to create a breaking change.
If desired, I can follow up with a separate PR to address that concern.

* Closes <https://github.com/emilk/egui/issues/5796>
* [x] I have followed the instructions in the PR template
2025-03-30 14:03:19 +02:00
Timo von Hartz ab0f0b7b64
Rename `should_propagate_event` & add `should_prevent_default` (#5779)
* [x] I have followed the instructions in the PR template

Currently eframe [calls
`prevent_default()`](962c7c7516/crates/eframe/src/web/events.rs (L307-L369))
for all copy / paste events on the
[*document*](962c7c7516/crates/eframe/src/web/events.rs (L88)),
making embedding an egui application in a page (e.g. an react
application) hard (as all copy & paste functionality for other elements
on the page is broken by this).

I'm not sure what the motivation for this is, if any.

This commit / PR adds a callback (`should_prevent_default`), similar to
`should_propgate_event`, that an egui application can use to overwrite
this behavior. It defaults to returning `true` for all events, to keep
the existing behavior.

I call `should_prevent_default` in every place that
`should_propagate_event` is called (which is not all places that
`prevent_default` is called!). I'm not sure for the motivation of not
calling `should_propagate_event` everywhere that `stop_propagation` is
called, but I kept that behavior for the `should_prevent_default`
callback too.

Please let me know if I'm missing some existing functionality that would
allow me to do this, or if there's a reason that we don't want
applications to be able to customize this (i.e. if there's a reason to
always `prevent_default` for all copy / paste events on the whole
document)
2025-03-30 14:00:46 +02:00
Emil Ernerfeldt 83254718a3 Clean up strikethrough/underline code in epaint 2025-03-30 13:15:41 +02:00
Emil Ernerfeldt 7ea3f762b8
Make text underline and strikethrough pixel perfect crisp (#5857)
Small visual fix: pixel-align any text underline or strikethrough.
Before they could be often be blurry.
2025-03-28 20:37:38 +01:00
Lucas Meurer 884be3491d
Fix color picker button (#5847)
* related to #5832 
(I want to keep that open and actually update the button to use the new
popup, but this should be enough to fix it for now)
* [X] I have followed the instructions in the PR template
2025-03-25 14:38:51 +01:00
TPhoenix 5d6aaa239b
Fix typo in style.rs (#5845)
lien -> line

<!--
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* The PR title is what ends up in the changelog, so make it descriptive!
* If applicable, add a screenshot or gif.
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* [ x ] I have followed the instructions in the PR template
2025-03-25 14:19:23 +01:00
Nicolas 8b62fd9286
Fix Lint for debug-assert (#5846)
Fixes the current ci workflow error
2025-03-25 14:18:45 +01:00
Grayden ddf9d267fc
Fix in `Scene`: make `scene_rect` full size on reset (#5801)
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# Overview

This is a small change that supports draggable elements inside a
`Scene`.

When a Scene is initialized with a `Rect::Zero`, following the [example
in the
demo](https://github.com/emilk/egui/blob/master/crates/egui_demo_lib/src/demo/scene.rs#L15),
it will [automatically be reset to the `inner_rect` of the
UI](https://github.com/emilk/egui/blob/master/crates/egui/src/containers/scene.rs#L120-L123).

This centers the scene on the inner-rect contents, however the resulting
`scene_rect` doesn't fill the entire `outer_rect`. This probably isn't
an issue for most users of `Scene`.

However, I want to support draggable elements on a `Scene`, and to do
that I need to map the pointer-position in the window to the scene_rect
position.

As is, the example of draggable elements on Scene works after the user
has modified the scene rect in some way (zoom or pan), when `scene_rect`
is set to `to_global.inverse() * outer_rect`
([here](https://github.com/emilk/egui/blob/master/crates/egui/src/containers/scene.rs#L114-L118)).
Before a user modifies the scene rect, the pointer-position cannot be
reliably mapped to the scene_rect, since the scene_rect doesn't span the
entire window.

This PR just forces that translation to always run after the scene_rect
is reset to `inner_rect`. The practical result is that the scene_rect
will now always span the full outer_rect.

# Example

Here's a small app that demonstrates the functionality I'm trying to
support. I'm new to Egui so there may be better patterns for what I'm
trying to do, but if you run this against `main` and this branch you'll
notice the difference.

```rs
use eframe::egui::*;

/// Map coordinates from the src rect to the target rect
fn map_to_rect(position: Pos2, src_rect: Rect, dest_rect: Rect) -> Pos2 {
    let x = (position.x - src_rect.min.x) / (src_rect.max.x - src_rect.min.x)
        * (dest_rect.max.x - dest_rect.min.x)
        + dest_rect.min.x;
    let y = (position.y - src_rect.min.y) / (src_rect.max.y - src_rect.min.y)
        * (dest_rect.max.y - dest_rect.min.y)
        + dest_rect.min.y;
    Pos2::new(x, y)
}

pub fn draggable_scene_element(
    ui: &mut Ui,
    id: Id,
    position: &mut Rect,
    scene_rect: Rect,
    container_rect: Rect,
) -> Response {
    let is_being_dragged = ui.ctx().is_being_dragged(id);
    if is_being_dragged {
        let r = ui.put(*position, |ui: &mut Ui| ui.label("Draggable"));

        if let Some(pointer_pos) = ui.ctx().pointer_interact_pos() {
            let pointer_pos = map_to_rect(pointer_pos, container_rect, scene_rect);
            let delta = pointer_pos.to_vec2() - position.center().to_vec2();
            *position = position.translate(delta);
        };
        r
    } else {
        let r = ui.put(*position, |ui: &mut Ui| ui.label("Draggable"));
        ui
            .interact(position.clone(), id, Sense::drag())
            .on_hover_cursor(CursorIcon::Grab);
        r
    }
}

struct MyApp {
    scene_rect: Rect,
    position: Rect,
}
impl MyApp {
    fn new() -> Self {
        Self {
            scene_rect: Rect::ZERO,
            position: Rect::from_min_size(Pos2::new(-50., -50.), Vec2::new(100., 100.)),
        }
    }
}

impl eframe::App for MyApp {
    fn update(&mut self, ctx: &Context, _frame: &mut eframe::Frame) {
        CentralPanel::default().show(ctx, |ui| {
            let scene_rect = self.scene_rect.clone();
            let container_rect = ui.min_rect();
            Scene::default().show(ui, &mut self.scene_rect, |ui| {
                ui.put(
                    Rect::from_min_size(Pos2::new(100., 200.), Vec2::new(100., 100.)),
                    |ui: &mut Ui| ui.label("static element"),
                );
                ui.put(self.position, |ui: &mut Ui| {
                    draggable_scene_element(
                        ui,
                        Id::from("demo"),
                        &mut self.position,
                        scene_rect,
                        container_rect,
                    )
                });
            });
        });
    }
}
```

# Summary

I need a way to map pointer coordinates to scene coordinates, in order
to support draggable elements in a scene. This patch makes that easier
by ensuring the scene_rect will always be the full size of the
outer_rect.

If you have a better way to accomplish what I'm after, I'm happy to
close this. Thanks!
2025-03-25 10:26:07 +01:00
Nicolas 2024295f78
Make ImageLoader use background thread (#5394)
This is the same change as in #4069 but as this is stale I wanted to
reopen a non stale PR

Modifies ImageLoader's load function to use background threads for the
image decoding work. This avoids blocking the main thread that is
especially noticeable when loading many images at once.

This was modelled after the other loader implementations that also use
threads.

* Closes <https://github.com/emilk/egui/issues/5375>
* [x] I have followed the instructions in the PR template

---------

Co-authored-by: lucasmerlin <lucasmeurer96@gmail.com>
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-03-25 10:17:31 +01:00
Nicolas 58b2ac88c0
Add assert messages and print bad argument values in asserts (#5216)
Enabled the `missing_assert_message` lint

* [x] I have followed the instructions in the PR template

---------

Co-authored-by: Lucas Meurer <lucasmeurer96@gmail.com>
2025-03-25 09:20:29 +01:00
StratusFearMe21 390e0bfc1e
Fix text input on Android (#5759)
<!--
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* Keep your PR:s small and focused.
* The PR title is what ends up in the changelog, so make it descriptive!
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* [x] I have followed the instructions in the PR template

This fixes an issue on android where keyboard input is not registered in
text boxes because `winit` does not fill in the `text` field of the
`KeyEvent`

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-03-21 14:35:46 +01:00
rustbasic 91f02f9e87
Enhance stability on Windows (#5723)
Dear emilk,

Programs built with egui on Windows are terminating every hour on
average.
When this commit is applied, it works fine for about 3 to 6 hours on
average.

I've been testing it for over 6 months and have submitted multiple PRs
since 6 months ago,
but they haven't applied it yet.

Thank you.

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-03-21 14:32:37 +01:00
GiGaGon 668abc2838
Add `expand_bg` to customize size of text background (#5365)
This removes the `expand(1.0)` on text background colors, since it makes
translucent background colors have bad looking bleeding.

There is probably a smarter solution than disabling the highlighting
entirely, but I don't see a way to do that while keeping the area
consumed consistent between translucent/solid colors, or adding a decent
step up in complexity.

Since this makes it impossible to tell if selected text is highlighted,
this also adds a blanket `0.5` gamma multiply to the text selection
background color. If that is undesirable because it's a bad arbitrary
number choice, or if it's too much of an unexpected change and just the
default values should be changed, please let me know.

These changes cause the tests that use screenshots with highlighted text
to fail, though I am not sure how to update those tests to match the
changes.

<details>
<summary>Comparison Images</summary>

Current:


![image](https://github.com/user-attachments/assets/6dc85492-4f8e-4e7a-84b4-3ee10a48b8b3)

After changes:


![image](https://github.com/user-attachments/assets/9b35bbd3-159d-42a9-b22f-80febb707cfa)
 

</details>

<details>
<summary>Code used to make comparison images</summary>

```rs
fn color_text_format(ui: &Ui, color: Color32) -> TextFormat {
    TextFormat { font_id: FontId::monospace(ui.text_style_height(&egui::TextStyle::Monospace)), background: color, ..Default::default() }
}

fn color_sequence_galley(ui: &Ui, text: &str, colors: [Color32; 3]) -> Arc<Galley> {
    let mut layout_job = LayoutJob::default();
    for color in colors {
        layout_job.append(text, 0.0, color_text_format(ui, color));
    }
    ui.fonts(|f| f.layout_job(layout_job))
}

fn color_sequence_row(ui: &mut Ui, label_text: &str, text: &str, colors: [Color32; 3]) {
    ui.label(label_text);
    ui.label(color_sequence_galley(ui, text, colors));
    ui.end_row();
}

egui::Grid::new("comparison display").show(ui, |ui| {
    ui.ctx().set_pixels_per_point(2.0);
    let transparent = Color32::TRANSPARENT;
    let solid = Color32::RED;
    let solid_2 = Color32::GREEN;
    let translucent_1 = Color32::GRAY.gamma_multiply(0.5);
    let translucent_2 = Color32::GREEN.gamma_multiply(0.5);
    color_sequence_row(ui, "Transparent to Solid:", " ", [transparent, solid, transparent]);
    color_sequence_row(ui, "Translucent to Transparent:", " ", [transparent, translucent_1, transparent]);
    color_sequence_row(ui, "Solid to Transparent:", " ", [solid, solid_2, solid]);
    color_sequence_row(ui, "Solid to Solid:", " ", [solid, transparent, solid]);
    color_sequence_row(ui, "Solid to Translucent:", " ", [solid, translucent_1, solid]);
    color_sequence_row(ui, "Translucent to Translucent:", " ", [translucent_1, translucent_2, translucent_1]);
    
    color_sequence_row(ui, "Transparent to Solid:", "a", [transparent, solid, transparent]);
    color_sequence_row(ui, "Translucent to Transparent:", "a", [transparent, translucent_1, transparent]);
    color_sequence_row(ui, "Solid to Transparent:", "a", [solid, solid_2, solid]);
    color_sequence_row(ui, "Solid to Solid:", "a", [solid, transparent, solid]);
    color_sequence_row(ui, "Solid to Translucent:", "a", [solid, translucent_1, solid]);
    color_sequence_row(ui, "Translucent to Translucent:", "a", [translucent_1, translucent_2, translucent_1]);
})
```
</details>

* [x] I have followed the instructions in the PR template

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
2025-03-21 13:45:34 +01:00
Emil Ernerfeldt 2058dcb881
Improve text sharpness (#5838)
This improves the sharpness of text slightly, thanks to
<https://hikogui.org/2022/10/24/the-trouble-with-anti-aliasing.html> by
@hikogui (🙏 ).

The difference is very small, but in dark mode (bright text on dark
background) text is sometimes significantly sharper, and also slightly
brighter.

The difference in light mode (dark text on light background) is much
smaller (barely perceptable).

To compare the before/after I suggest you open both in new tabs, then
quickly change between them.

### Low-DPI
#### Before
![Code Editor
old](https://github.com/user-attachments/assets/e10a3cad-932f-48cd-b7d6-5bfe70954c5e)

#### After
![Code
Editor](https://github.com/user-attachments/assets/2e7383fe-8023-4425-91c8-93df3c22c0fe)

#### Before

![old-white](https://github.com/user-attachments/assets/51c41c59-e897-4831-857a-f3ffe17ce7d4)

#### After

![new-white](https://github.com/user-attachments/assets/4ac6f951-8c57-4bcc-a5d5-788cf52ea7d8)

### High-DPI
The difference is starkest on low-DPI screens (like the above
screenshots). On high-DPI screens, the difference is much smaller

#### Before
![widget_gallery
old](https://github.com/user-attachments/assets/f2149a30-aef8-4383-b48c-73d33a03ca02)

#### After

![widget_gallery](https://github.com/user-attachments/assets/c9ceb8be-8a32-490c-9364-2c6562b741f6)
2025-03-21 12:56:47 +01:00
Emil Ernerfeldt 3f731ec794
Fix semi-transparent colors appearing too bright (#5824)
The bug was in `Color32::from_rgba_unmultiplied` and by extension
affects:

* `Color32::from_rgba_unmultiplied`
* `hex_color!`
* `HexColor`
* `ColorImage::from_rgba_unmultiplied`
* All images with transparency (png, webp, …)
* `Color32::from_white_alpha`

The bug caused translucent colors to appear too bright.

## More
Color is hard.

When I started out egui I thought "linear space is objectively better,
for everything!" and then I've been slowly walking that back for various
reasons:

* sRGB textures not available everywhere
* gamma-space is more _perceptually_ even, so it makes sense to use for
anti-aliasing
* other applications do everything in gamma space, so that's what people
expect (this PR)

Similarly, pre-multiplied alpha _makes sense_ for blending colors. It
also enables additive colors, which is nice. But it does complicate
things. Especially when mixed with sRGB/gamma (As @karhu [points
out](https://github.com/emilk/egui/pull/5824#issuecomment-2738099254)).

## Related
* Closes https://github.com/emilk/egui/issues/5751
* Closes https://github.com/emilk/egui/issues/5771 ? (probably; hard to
tell without a repro)
* But not https://github.com/emilk/egui/issues/5810

## TODO
* [x] I broke the RGBA u8 color picker. Fix it

---------

Co-authored-by: Andreas Reich <andreas@rerun.io>
2025-03-21 10:45:25 +01:00
Jim d54e29d375
macOS: Add `movable_by_window_background` option to viewport (#5412)
Add an option called `movable_by_window_background` alongside a new
builder method. When set to true, the window is movable by dragging its
background ([Apple
Docs](https://developer.apple.com/documentation/appkit/nswindow/ismovablebywindowbackground))

This is exclusive to macOS systems, similar to `fullsize_content_view`.

* [x] I have followed the instructions in the PR template
2025-03-20 11:05:22 +01:00
StratusFearMe21 52732b23a6
impl AsRef<[u8]> for FontData (#5757)
* [x] I have followed the instructions in the PR template

This PR implements `AsRef<[u8]>` for `FontData`, allowing it to be
passed into `fontdb`'s
[`Source`](https://docs.rs/fontdb/0.16.2/fontdb/enum.Source.html) type.
This would allow `egui` and `cosmic_text` to share font data with
eachother
2025-03-20 11:03:17 +01:00
Nicolas Gomez 1545dec7a8
[egui_extra] Allow loading multi-mime formats using the image_loader (#5769)
Hi ! 

I'm using egui and egui_extra to build a demo tool for a crate I'm
building. In this crate I load favicons from a lot of websites, and I
have some failures on some .ico files. After tracking this thing down, I
guess there is two issues (kinda), in the image crate,
'image/vnd.microsoft.icon' isn't recognized as the valid mime for an ico
image (I created a [PR](https://github.com/image-rs/image/pull/2434)),
and the code to detect if a given mime type is compatible with the image
crate decoders in this crate do not support multi-mime type formats.


[ImageFormat::to_mime_type](85f2412d55/src/image.rs (L216C12-L216C24))
is only returning one mime for a given format (which is fine), we
compare the result of this method to guess if the format is
valid/enabled. Retriveing the correct format using
[ImageFormat::from_mime_type](85f2412d55/src/image.rs (L166))
would allow more mime to be considered valid since multiple mime can
match the same format.

The same applies to the extension detection, which I also modified to
stay consistent

Thanks
2025-03-20 11:02:24 +01:00
valadaptive d0bd525b5d
Bump accesskit to 0.18 and make it a workspace dependency (#5783)
This can't be merged until [kittest's accesskit is
bumped](https://github.com/rerun-io/kittest/pull/9) ~~and [a new version
of rfd is released](https://github.com/PolyMeilex/rfd/pull/240)~~.

---------

Co-authored-by: Lucas Meurer <lucasmeurer96@gmail.com>
2025-03-20 11:00:12 +01:00
Juan Campa 77244cd4c5
⚠️ Close popup if `Memory::keep_popup_open` isn't called (#5814)
Breaking changes:
- When using the Memory::popup state, it's now required to call
keep_popup_open each frame or the popup will close.
- Usually handled by the `Popup` struct, but required for custom popups
using the state in `Memory` directly

-----

If a popup is abandoned `Memory::popup` would remain `Some`. This is
problematic if, for example, you have logic that checks
`is_any_popup_open`.

This PR adds a new requirement for popups keeping their open state in
`Memory::popup`. They must call `Memory::keep_popup_open` as long as
they are being rendered. The recent changes in #5716 make this easy to
implement.

Supersedes #4697 which had an awkward implementation

These two videos show a case where a context menu was open when the
underlying widget got removed.

Before (`any_popup_open` remains `true`)
![Screenshot 2025-03-16 at 18 22
50](https://github.com/user-attachments/assets/22db64dd-e6f2-4501-9bda-39f470b9210c)

After
![Screenshot 2025-03-16 at 18 21
14](https://github.com/user-attachments/assets/bd4631b1-a0ad-4047-a14d-cd4999710e07)



* Closes https://github.com/emilk/egui/issues/3657
* [x] I have followed the instructions in the PR template
2025-03-20 10:51:42 +01:00
Sven Niederberger b0bbca4e69
Add `OutputCommand::SetPointerPosition` to set mouse position (#5776)
<!--
Please read the "Making a PR" section of
[`CONTRIBUTING.md`](https://github.com/emilk/egui/blob/master/CONTRIBUTING.md)
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* Keep your PR:s small and focused.
* The PR title is what ends up in the changelog, so make it descriptive!
* If applicable, add a screenshot or gif.
* If it is a non-trivial addition, consider adding a demo for it to
`egui_demo_lib`, or a new example.
* Do NOT open PR:s from your `master` branch, as that makes it hard for
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* Open the PR as a draft until you have self-reviewed it and run
`./scripts/check.sh`.
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This is not supported on the web and not yet on Wayland.

~~I also had to update `ring` and add an exception for `paste` being
unmaintained.~~ Has since been updated on master.

* [x] I have followed the instructions in the PR template
2025-03-20 10:51:02 +01:00
valadaptive 267485976b
Simplify the text cursor API (#5785)
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* The PR title is what ends up in the changelog, so make it descriptive!
* If applicable, add a screenshot or gif.
* If it is a non-trivial addition, consider adding a demo for it to
`egui_demo_lib`, or a new example.
* Do NOT open PR:s from your `master` branch, as that makes it hard for
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* Open the PR as a draft until you have self-reviewed it and run
`./scripts/check.sh`.
* When you have addressed a PR comment, mark it as resolved.

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-->

* Closes N/A, but this is part of
https://github.com/emilk/egui/issues/3378
* [x] I have followed the instructions in the PR template

Other text layout libraries in Rust--namely, Parley and Cosmic
Text--have one canonical text cursor type (Parley's is a byte index,
Cosmic Text's also stores the line index). To prepare for migrating egui
to one of those libraries, it should also have only one text cursor
type. I also think simplifying the API is a good idea in and of
itself--having three different cursor types that you have to convert
between (and a `Cursor` struct which contains all three at once) is
confusing.

After a bit of experimentation, I found that the best cursor type to
coalesce around is `CCursor`. In the few places where we need a
paragraph index or row/column position, we can calculate them as
necessary.

I've removed `CursorRange` and `PCursorRange` (the latter appears to
have never been used), merging the functionality with `CCursorRange`. To
preserve the cursor position when navigating row-by-row, `CCursorRange`
now stores the previous horizontal position of the cursor.

I've also removed `PCursor`, and renamed `RowCursor` to `LayoutCursor`
(since it includes not only the row but the column). I have not renamed
either `CCursorRange` or `CCursor` as those names are used in a lot of
places, and I don't want to clutter this PR with a bunch of renames.
I'll leave it for a later PR.

Finally, I've removed the deprecated methods from `TextEditState`--it
made the refactoring easier, and it should be pretty easy to migrate to
the equivalent `TextCursorState` methods.

I'm not sure how many breaking changes people will actually encounter. A
lot of these APIs were technically public, but I don't think many were
useful. The `TextBuffer` trait now takes `&CCursorRange` instead of
`&CursorRange` in a couple of methods, and I renamed
`CCursorRange::sorted` to `CCursorRange::sorted_cursors` to match
`CursorRange`.

I did encounter a couple of apparent minor bugs when testing out text
cursor behavior, but I checked them against the current version of egui
and they're all pre-existing.
2025-03-20 10:49:38 +01:00
Trương Hoàng Long 6a8ee29a4e
Fix disabled `DragValue` eating focus, causing focus to reset (#5826)
<!--
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* Keep your PR:s small and focused.
* The PR title is what ends up in the changelog, so make it descriptive!
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* Closes https://github.com/emilk/egui/issues/5507
* [x] I have followed the instructions in the PR template
2025-03-20 10:45:16 +01:00
MStarha f408ccafbc
Fix `DragValue` expansion when editing (#5809)
* [x] I have followed the instructions in the PR template

This PR fixes an issue, where `DragValue` would expand when it enters
editing state. There were 3 contributing problems:
- A workaround introduced in #4276 caused the `DragValue` to report
incorrect outer size.
- The `DragValue` uses `TextEdit` internally and sets both `min_size`
and `desired_width` to the same value - desired width is used **before**
padding is applied - this is in contrast to `Button` (also used
internally by `DragValue`), which only uses `min_size`. This caused the
`DragValue` to expand horizontally by the size of button padding.
- The height of the `TextEdit` is (among other things) determined by the
height of the row, which was not present in `Button`. This caused a
small vertical expansion, when the contents (including padding) were
larger than the `min_size`.


![egui_drag_value_expansion](https://github.com/user-attachments/assets/b6fe9bd8-5755-4a43-8b61-a7e5b24e678d)
Here the dimensions set in code are:
- padding: 20 x 20 pt
- interact size: 80 x 30 pt

*Note: I do not know what's up with the tests. When I ran the check
script, they were failing because of 3 UI missmatches, so I updated the
snapshots. Now, the updated snapshots cause the same failure in CI, that
appeared locally before the update. Now the locally run tests fail with
`The platform you're compiling for is not supported by winit` and couple
more following errors coming from the same source (`winit 0.30.7`).*
2025-03-20 10:40:22 +01:00
Lucas Meurer 93c06c3405
Add color picker menu item example (#5755)
* To be merged after #5756 



https://github.com/user-attachments/assets/ad40c172-cad2-4cc5-a3ef-3284b6545e94
2025-03-19 09:33:17 +01:00
Lucas Meurer a2afc8d092
Make `close_popup` take an `Id` and add `close_all_popups` (#5820)
Ooops, fixes a regression introduced in #5799

* [x] I have followed the instructions in the PR template
2025-03-18 15:32:14 +01:00
Markus Krause 1aced06e47
refactor mime type support detection in image loader to allow for deferred handling and appended encoding info (#5686)
as recommended by @lucasmerlin in #5679

* Closes #5679
* [x] I have followed the instructions in the PR template
2025-03-18 11:51:00 +01:00
Lucas Meurer 9604dae229
Fix kinetic scrolling on touch devices (#5778)
Fixes kinetic scrolling on android (and possibly other touch devices),
by calculating the final velocity before clearing the position history
on PointerGone events.

* Closes #5311 
* [X] I have followed the instructions in the PR template
2025-03-18 11:41:53 +01:00
Lucas Meurer 626cd9e227
Fix `Response::clicked_elsewhere` not returning true sometimes (#5798)
* Closes #5794
2025-03-18 11:40:33 +01:00