Fix: `Event::Copy` and `Event::Cut` behave as if they select the entire
text when there is no selection.
It's unexpected and disconcerting that this behavior occurs when there
is no selected area.
Fix: panic when dragging window between monitors of different
pixels_per_point
This will continue to help us as we develop `egui`.
I hope you agree with my defense of `panic`.
* Relate #3959
* Relate #4088
* Closes#4178
* Closes#4179
There is also a way to add log if necessary.
```
log::debug!("Anti-panic behavior occurs");
```
---------
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
When using a `DragValue`, there are three common modes of range clamping
that the user may want:
A) no clamping
B) clamping only user input (dragging or editing text), but leave
existing value intact
C) always clamp
The difference between mode B and C is:
```rs
let mut x = 42.0;
ui.add(DragValue::new(&mut x).range(0.0..=1.0));
// What will `x` be here?
```
With this PR, we now can get the three behaviors with:
* A): don't call `.range()` (or use `-Inf..=Inf`)
* B) call `.range()` and `.clamp_existing_to_range(false)`
* C) call `.range()`
## Slider clamping
Slider clamping is slightly different, since a slider always has a
range.
For a slider, there are these three cases to consider:
A) no clamping
B) clamp any value that the user enters, but leave existing values
intact
C) always clamp all values
Out of this, C should probably be the default.
I'm not sure what the best API is for this yet. Maybe an `enum` 🤔
I'll take a pass on that in a future PR.
## Related
* https://github.com/emilk/egui/pull/4728
* https://github.com/emilk/egui/issues/4881
* https://github.com/emilk/egui/pull/4882
Fix for a regression in 0.28
* `App::save` will now be called when the web app is hidden (e.g. goes
to a background tab)
* `App::update` will now be called when the web app is un-hidden (e.g.
becomes the foreground tab)
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- I fixed the TODO to use the `log` crate instead of `eprintln`
- Set the rust-version in the `scripts/check.sh` to the same as egui is
on
- I made xtask use anyhow to remove some unwraps
* [x] I have followed the instructions in the PR template
* Closes https://github.com/emilk/egui/issues/4976
* Part of #4378
* Implements parts of #843
### Background
Some widgets (like `Grid` and `Table`) needs to know the width of future
elements in order to properly size themselves. For instance, the width
of the first column of a grid may not be known until all rows of the
grid has been added, at which point it is too late. Therefore these
widgets store sizes from the previous frame. This leads to "first-frame
jitter", were the content is placed in the wrong place for one frame,
before being accurately laid out in subsequent frames.
### What
This PR adds the function `ctx.request_discard` which discards the
visual output and does another _pass_, i.e. calls the whole app UI code
once again (in eframe this means calling `App::update` again). This will
thus discard the shapes produced by the wrongly placed widgets, and
replace it with new shapes. Note that only the visual output is
discarded - all other output events are accumulated.
Calling `ctx.request_discard` should only be done in very rare
circumstances, e.g. when a `Grid` is first shown. Calling it every frame
will mean the UI code will become unnecessarily slow.
Two safe-guards are in place:
* `Options::max_passes` is by default 2, meaning egui will never do more
than 2 passes even if `request_discard` is called on every pass
* If multiple passes is done for multiple frames in a row, a warning
will be printed on the screen in debug builds:
### Breaking changes
A bunch of things that had "frame" in the name now has "pass" in them
instead:
* Functions called `begin_frame` and `end_frame` are now called
`begin_pass` and `end_pass`
* `FrameState` is now `PassState`
* etc
### TODO
* [x] Figure out good names for everything (`ctx.request_discard`)
* [x] Add API to query if we're gonna repeat this frame (to early-out
from expensive rendering)
* [x] Clear up naming confusion (pass vs frame) e.g. for `FrameState`
* [x] Figure out when to call this
* [x] Show warning on screen when there are several frames in a row with
multiple passes
* [x] Document
* [x] Default on or off?
* [x] Change `Context::frame_nr` name/docs
* [x] Rename `Context::begin_frame/end_frame` and deprecate the old ones
* [x] Test with Rerun
* [x] Document breaking changes
Note this will break people depending on eframe or egui-wgpu with
--no-default-features.
I don't know what to do about that to be honest.
* Closes#4914
* [x] I have followed the instructions in the PR template
---------
Co-authored-by: Andreas Reich <r_andreas2@web.de>
* Closes <https://github.com/emilk/egui/issues/4490>
* [x] I have followed the instructions in the PR template
---
Unfortunately, this PR contains a bunch of breaking changes because
`Context` no longer has one style, but two. I could try to add some of
the methods back if that's desired.
The most subtle change is probably that `style_mut` mutates both the
dark and the light style (which from the usage in egui itself felt like
the right choice but might be surprising to users).
I decided to deviate a bit from the data structure suggested in the
linked issue.
Instead of this:
```rust
pub theme: Theme, // Dark or Light
pub follow_system_theme: bool, // Change [`Self::theme`] based on `RawInput::system_theme`?
```
I decided to add a `ThemePreference` enum and track the current system
theme separately.
This has a couple of benefits:
* The user's theme choice is not magically overwritten on the next
frame.
* A widget for changing the theme preference only needs to know the
`ThemePreference` and not two values.
* Persisting the `theme_preference` is fine (as opposed to persisting
the `theme` field which may actually be the system theme).
The `small_toggle_button` currently only toggles between dark and light
(so you can never get back to following the system). I think it's easy
to improve on this in a follow-up PR :)
I made the function `pub(crate)` for now because it should eventually be
a method on `ThemePreference`, not `Theme`.
To showcase the new capabilities I added a new example that uses
different "accent" colors in dark and light mode:
<img
src="https://github.com/user-attachments/assets/0bf728c6-2720-47b0-a908-18bd250d15a6"
width="250" alt="A screenshot of egui's widget gallery demo in dark mode
using a purple accent color instead of the default blue accent">
<img
src="https://github.com/user-attachments/assets/e816b380-3e59-4f11-b841-8c20285988d6"
width="250" alt="A screenshot of egui's widget gallery demo in light
mode using a green accent color instead of the default blue accent">
---------
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
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* Closes https://github.com/emilk/egui/issues/3549
* [X] I have followed the instructions in the PR template
The syntax highlighting font size was always hardcoded to 12 or 10
depending on what case it was hitting (so not consistent). This is
particularly noticeable when you increase the font size to something
larger for the rest of the ui.
With this the default monospace font size is used by default.
Since the issue is closely related to #3549 I decided to implement the
ability to use override_font_id too.
## Visualized
Default monospace is set to 15 in all the pictures
Before/After without syntect:
Before/after _with_ syntect:
Font override after without/with syntect (monospace = 20):
### Breaking changes
- `CodeTheme::dark` and `CodeTheme::light` takes in the font size
- `CodeTheme::from_memory` takes in `Style`
- `highlight` function takes in `Style`
* [X] I have followed the instructions in the PR template
This allows you to transform widgets without having to put them on a new
layer.
Example usage:
https://github.com/user-attachments/assets/6b547782-f15e-42ce-835f-e8febe8d2d65
```rust
use eframe::egui;
use eframe::egui::{Button, Frame, InnerResponse, Label, Pos2, RichText, UiBuilder, Widget};
use eframe::emath::TSTransform;
use eframe::NativeOptions;
use egui::{CentralPanel, Sense, WidgetInfo};
pub fn main() -> eframe::Result {
eframe::run_simple_native("focus test", NativeOptions::default(), |ctx, _frame| {
CentralPanel::default().show(ctx, |ui| {
let response = ui.ctx().read_response(ui.next_auto_id());
let pressed = response
.as_ref()
.is_some_and(|r| r.is_pointer_button_down_on());
let hovered = response.as_ref().is_some_and(|r| r.hovered());
let target_scale = match (pressed, hovered) {
(true, _) => 0.94,
(_, true) => 1.06,
_ => 1.0,
};
let scale = ui
.ctx()
.animate_value_with_time(ui.id().with("Down"), target_scale, 0.1);
let mut center = response
.as_ref()
.map(|r| r.rect.center())
.unwrap_or_else(|| Pos2::new(0.0, 0.0));
if center.any_nan() {
center = Pos2::new(0.0, 0.0);
}
let transform = TSTransform::from_translation(center.to_vec2())
* TSTransform::from_scaling(scale)
* TSTransform::from_translation(-center.to_vec2());
ui.with_visual_transform(transform, |ui| {
Button::new(RichText::new("Yaaaay").size(20.0))
.sense(Sense::click())
.ui(ui)
});
});
})
}
```
Improves performances significantly (about 40 times) according to the
benchmarks.
* Closes <https://github.com/emilk/egui/issues/5086>
* [x] I have followed the instructions in the PR template
As most of the code refers to types in epaint, it makes sense to use the
Color32 alias from epaint as well.
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- [x] I have followed the instructions in the PR template
Before making this PR, I did take notice of a similar PR,
https://github.com/emilk/egui/pull/4833, but as it appears to be
abandoned, I decided to make this PR.
**Missing**
One of the checks doesn't pass as wgpu still uses glow `0.13.1`
```shell
cargo deny --all-features --log-level error --target aarch64-apple-darwin check
```
* [x] I have followed the instructions in the PR template
---------
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
Remove the crate visibility of the frame module. Useful at least when
using `Frame::begin` as otherwise the returned type is opaque to library
users and prevents from creating containers that use `Frame` with a
similar interface.
Alternative is to only export `frame::Prepared` as `PreparedFrame` or
something, but I saw that other submodules of containers are already
public.
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* Closes#2106
* [x] I have followed the instructions in the PR template
Extracted out of #4805
I'm using this widget type in [`egui-theme-switch`] but since it's not
built in I have to call `accesskit_node_builder` which is a bit
cumbersome :)
* [x] I have followed the instructions in the PR template
[`egui-theme-switch`]:
https://github.com/bash/egui-theme-switch/blob/main/src/lib.rs
Use `UiBuilder::new().sizing_pass().invisible()` instead.
Also changes `UiBuilder::sizing_pass` to no longer turn the ui
invisible. You'll have to opt-in to that instead when it makes sense,
e.g. for the first frame of a tooltip, but not when auto-sizing a column
in a `Table`.
This takes 3 hardcoded constants from `input_state.rs` and puts them in
a `InputOptions` struct that then gets added to `Options`. This allows
adjusting these values at runtime, for example, to increase
`MAX_CLICK_DIST` for touchscreen usage.
* [x] I have followed the instructions in the PR template
Currently egui will prevent all web events from propagating. This causes
issues in contexts where you are using egui in a larger web context that
wants to receive events that egui does not directly respond to. For
example, currently using egui in a VSCode extension will block all app
hotkeys, such as saving and opening the panel.
This adds a closure to `WebOptions` that takes in a reference to the
egui event that is generated from a web event and returns if the
corresponding web event should be propagated or not. The default for it
is to always return false.
Alternatives I considered were:
1. Having the propagation filter be a property of the focus in memory.
That way it could be configured by the view currently selected. I opted
away from that because I wanted to avoid lowering eframe implementation
specific stuff into egui.
2. Having events contain a `web_propagate` flag that could be set when
handling them. However, that would not be compatible with the current
system of egui events being handled outside of the web event handler.
I just recently started using egui so I am not sure how idiomatic my
approach here is. I would be happy to switch this over to a different
architecture if there are suggestions.
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* [x] I have followed the instructions in the PR template
I love egui! Thank you Emil <3
This request specifically enables an `eframe::App` which stores a
lifetime.
In general, I believe this is necessary because `eframe::App` currently
does not seem to provide a good place to allocate and then borrow from
long-lived data between `update()` calls. To attempt to borrow such
long-lived data from a field of the `App` itself would be to create a
self-referential struct. A hacky alternative is to allocate long-lived
data with `Box::leak`, but that's a code smell and would cause problems
if a program ever creates multiple Apps.
As a more specific motivating example, I am developing with the
[inkwell](https://github.com/TheDan64/inkwell/) crate which requires
creating a `inkwell::context::Context` instance which is then borrowed
from by a bazillion things with a dedicated `'ctx` lifetime. I need such
a `inkwell::context::Context` for the duration of my `eframe::App` but I
can't store it as a field of the app. The most natural solution to me is
to simply to lift the inkwell context outside of the App and borrow from
it, but that currently fails because the AppCreator implicitly has a
`'static` lifetime requirement due to the use of `dyn` trait objects.
Here is a simpler, self-contained motivating example adapted from the
current [hello world example](https://docs.rs/eframe/latest/eframe/):
```rust
use eframe::egui;
struct LongLivedThing {
message: String,
}
fn main() {
let long_lived_thing = LongLivedThing {
message: "Hello World!".to_string(),
};
let native_options = eframe::NativeOptions::default();
eframe::run_native(
"My egui App",
native_options,
Box::new(|cc| Ok(Box::new(MyEguiApp::new(cc, &long_lived_thing)))),
// ^^^^^^^^^^^^^^^^^
// BORROWING from long_lived_thing in App
);
}
struct MyEguiApp<'a> {
long_lived_thing: &'a LongLivedThing,
}
impl<'a> MyEguiApp<'a> {
fn new(cc: &eframe::CreationContext<'_>, long_lived_thing: &'a LongLivedThing) -> Self {
// Customize egui here with cc.egui_ctx.set_fonts and cc.egui_ctx.set_visuals.
// Restore app state using cc.storage (requires the "persistence" feature).
// Use the cc.gl (a glow::Context) to create graphics shaders and buffers that you can use
// for e.g. egui::PaintCallback.
MyEguiApp { long_lived_thing }
}
}
impl<'a> eframe::App for MyEguiApp<'a> {
fn update(&mut self, ctx: &egui::Context, frame: &mut eframe::Frame) {
egui::CentralPanel::default().show(ctx, |ui| {
ui.heading(&self.long_lived_thing.message);
});
}
}
```
This currently fails to compile with:
```plaintext
error[E0597]: `long_lived_thing` does not live long enough
--> src/main.rs:16:55
|
16 | Box::new(|cc| Ok(Box::new(MyEguiApp::new(cc, &long_lived_thing)))),
| ----------------------------------------------^^^^^^^^^^^^^^^^----
| | | |
| | | borrowed value does not live long enough
| | value captured here
| cast requires that `long_lived_thing` is borrowed for `'static`
17 | );
18 | }
| - `long_lived_thing` dropped here while still borrowed
|
= note: due to object lifetime defaults, `Box<dyn for<'a, 'b> FnOnce(&'a CreationContext<'b>) -> Result<Box<dyn App>, Box<dyn std::error::Error + Send + Sync>>>` actually means `Box<(dyn for<'a, 'b> FnOnce(&'a CreationContext<'b>) -> Result<Box<dyn App>, Box<dyn std::error::Error + Send + Sync>> + 'static)>`
```
With the added lifetimes in this request, I'm able to compile and run
this as expected on Ubuntu + Wayland. I see the CI has been emailing me
about some build failures and I'll do what I can to address those.
Currently running the check.sh script as well.
This is intended to resolve https://github.com/emilk/egui/issues/2152
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* Closes https://github.com/emilk/egui/issues/2152
* [x] I have followed the instructions in the PR template
eframe now has its own logic to find the storage_dir to persist the app
when the persistence feature is enabled, instead of using the
directories crate. The directory should be the same as before (verified
with a unit test).
* Closes <https://github.com/emilk/egui/issues/4884>
* [x] I have followed the instructions in the PR template
Fix: The viewport stops working when the program is minimized.
Fix: Logically, the weird parts have been normalized.
**Issue :**
The viewport stops working when the program is minimized.
* Related #3321
* Related #3877
* Related #3985
* Closes#3972
* Closes#4772
* Related #4832
* Closes#4892
**Solution :**
When `request_redraw()` is performed in Minimized state, the occasional
screen tearing phenomenon has disappeared.
( Probably expected to be the effect of #4814 )
To address the issue of the `Immediate Viewport` not updating in
Minimized state, we can call `request_redraw()`.
Adding the proposed changes from @SymmetricChaos
* Closes https://github.com/emilk/egui/issues/5044
* [x] I have followed the instructions in the PR template
* [x] I ran the check script
You can see this feature in action
[here](https://docs.rs/sysinfo/latest/src/sysinfo/common/system.rs.html#46)
or on any of dtolnay's crates and many others. I found myself going
through your project code recently on docs.rs and I was a bit sad I
couldn't have this feature enabled. This should fix it at next release.
:)
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* Closes <https://github.com/emilk/egui/issues/4776>
* [x] I have followed the instructions in the PR template
I've been meaning to look into this for a while but finally bit the
bullet this week. Contrary to what I initially thought, the problem of
blurry lines is unrelated to feathering because it also happens with
feathering disabled.
The root cause is that lines tend to land on pixel boundaries, and
because of that, frequently used strokes (e.g. 1pt), end up partially
covering pixels. This is especially noticeable on 1ppp displays.
There were a couple of things to fix, namely: individual lines like
separators and indents but also shape strokes (e.g. Frame).
Lines were easy, I just made sure we round them to the nearest pixel
_center_, instead of the nearest pixel boundary.
Strokes were a little more complicated. To illustrate why, here’s an
example: if we're rendering a 5x5 rect (black fill, red stroke), we
would expect to see something like this:
The fill and the stroke to cover entire pixels. Instead, egui was
painting the stroke partially inside and partially outside, centered
around the shape’s path (blue line):
Both methods are valid for different use-cases but the first one is what
we’d typically want for UIs to feel crisp and pixel perfect. It's also
how CSS borders work (related to #4019 and #3284).
Luckily, we can use the normal computed for each `PathPoint` to adjust
the location of the stroke to be outside, inside, or in the middle.
These also are the 3 types of strokes available in tools like Photoshop.
This PR introduces an enum `StrokeKind` which determines if a
`PathStroke` should be tessellated outside, inside, or _on_ the path
itself. Where "outside" is defined by the directions normals point to.
Tessellator will now use `StrokeKind::Outside` for closed shapes like
rect, ellipse, etc. And `StrokeKind::Middle` for the rest since there's
no meaningful "outside" concept for open paths. This PR doesn't expose
`StrokeKind` to user-land, but we can implement that later so that users
can render shapes and decide where to place the stroke.
### Strokes test
(blue lines represent the size of the rect being rendered)
`Stroke::Middle` (current behavior, 1px and 3px are blurry)
`Stroke::Outside` (proposed default behavior for closed paths)
`Stroke::Inside` (for completeness but unused at the moment)
### Demo App
The best way to review this PR is to run the demo on a 1ppp display,
especially to test hover effects. Everything should look crisper. Also
run it in a higher dpi screen to test that nothing broke 🙏.
Before:
After (notice the sharper lines):
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I removed (I hope so) all wildcard imports I found.
For me on my pc this improved the build time:
- for egui -5s
- for eframe -12s
* [x] I have followed the instructions in the PR template
Fix: Ensures correct IME behavior when the text input area gains or
loses focus.
Fix: Handling `state.ime_enabled` in multiple `TextEdit`.
Fix: A symptom of characters being copied when there are multiple
TextEdits.
* Related #4137
* Related #4358
* Closes#4374
* Related #4436
* Related #4794
* Related #4908
* Related #5008
Fix Issues: When focus is moved elsewhere, you must set
`state.ime_enabled = false`, otherwise the IME will have problems when
focus returns.
Fix Issues: A symptom of characters being copied when there are multiple
TextEdits.
Deletes all current `IME events`, preventing them from being copied to
`other TextEdits`, without saving the `TextEdit ID`,
( Related Issues: Some `LINUX` seem to trigger an IME enable event on
startup. So, when we gained focus, we do `state.ime_enabled = false`. )
